阅读说明：本技术 物理信号传输方法及装置、物理信号资源分配方法及装置 (Physical signal transmission method and device and physical signal resource allocation method and device ) 是由 林鹏 苏笛 张闯 钱辰 喻斌 于 2020-02-18 设计创作，主要内容包括：提供一种物理信号传输方法及装置、物理信号资源分配方法及装置。用于IAB节点的物理信号传输方法包括：获取用于发送物理信号的配置参数；当IAB节点的终端功能实体上行发送链路、终端功能实体下行接收链路、基站功能实体下行发送链路、基站功能实体上行接收链路进行同时同频的全双工传输时,根据获取的配置参数在相同时域资源上发送由所述IAB节点的终端功能实体发送的上行物理信号和由所述IAB节点的基站功能实体发送的下行物理信号。(A physical signal transmission method and device, and a physical signal resource allocation method and device are provided. The physical signal transmission method for the IAB node comprises the following steps: acquiring configuration parameters for transmitting physical signals; when a terminal function entity uplink sending link, a terminal function entity downlink receiving link, a base station function entity downlink sending link and a base station function entity uplink receiving link of the IAB node carry out full duplex transmission with the same frequency at the same time, sending an uplink physical signal sent by the terminal function entity of the IAB node and a downlink physical signal sent by the base station function entity of the IAB node on the same time domain resource according to the obtained configuration parameters.)

1. A physical signal transmission method for accessing a backhaul integrated IAB node comprises the following steps:

acquiring configuration parameters for transmitting physical signals;

when a terminal function entity uplink sending link, a terminal function entity downlink receiving link, a base station function entity downlink sending link and a base station function entity uplink receiving link of the IAB node carry out full duplex transmission with the same frequency at the same time, sending an uplink physical signal sent by the terminal function entity of the IAB node and a downlink physical signal sent by the base station function entity of the IAB node on the same time domain resource according to the obtained configuration parameters.

2. The physical signal transmission method for the IAB node of claim 1, wherein the physical signal comprises at least one of: a reference signal for self-interference channel estimation, a demodulation reference signal, a phase tracking reference signal, a sounding reference signal,

and/or, wherein the configuration parameters for transmitting the physical signal include uplink physical signal parameters and downlink physical signal parameters,

and/or wherein the uplink physical signal parameter comprises at least one of: the method comprises the following steps of carrying out cyclic shift amount information on an uplink physical signal, comb frequency domain resource structure information and comb frequency domain resource structure switching period information on the uplink physical signal, frequency hopping pattern information and frequency hopping switching interval information on the uplink physical signal, and frequency domain and time domain orthogonal superposition code information on the uplink physical signal, wherein downlink physical signal parameters comprise at least one of the following parameters: cyclic shift amount information of a downlink physical signal, comb frequency domain resource structure information and comb frequency domain resource structure switching period information of the downlink physical signal, frequency hopping pattern information and frequency hopping switching interval information of the downlink physical signal, and frequency domain and time domain orthogonal cover code information of the downlink physical signal,

and/or, the downlink physical signal parameter further includes a physical root sequence number of an uplink physical signal sent by the terminal function entity of the IAB node.

3. The method of claim 1 or 2, wherein the step of sending the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource according to the obtained configuration parameter comprises:

when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring different cyclic shift amounts for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters;

the uplink physical signal and the downlink physical signal to which different cyclic shift amounts are allocated are transmitted on the same time domain resource.

4. The method of claim 1 or 2, wherein the step of sending the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource according to the obtained configuration parameter comprises:

when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a comb-shaped frequency domain resource structure for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters;

and sending the uplink physical signal and the downlink physical signal configured with different comb frequency domain resource structures on the same time domain resource.

5. The method of claim 1 or 2, wherein the step of sending the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource according to the obtained configuration parameter comprises:

configuring frequency hopping patterns for the uplink physical signals and the downlink physical signals according to the acquired configuration parameters;

and transmitting the uplink physical signal and the downlink physical signal configured with different frequency hopping patterns on the same time domain resource.

6. The method of claim 1 or 2, wherein the step of sending the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource according to the obtained configuration parameter comprises:

when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a frequency domain orthogonal superposition code and a time domain orthogonal superposition code for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters;

and sending the uplink physical signal and the downlink physical signal which are configured with different frequency domain and time domain orthogonal superposition codes on the same time domain resource.

7. A resource allocation method for physical signals among IAB nodes comprises the following steps:

grouping all IAB nodes, and setting the resources of the physical signals of the IAB nodes in each group as all time division multiplexing or all frequency division multiplexing;

setting the resource of the physical signal of the IAB nodes in the groups as all groups of all time division multiplexing, and setting the resource of the physical signal of the IAB nodes in the groups as frequency division multiplexing;

the resources for the physical signals of the IAB nodes within a group are set to all groups of the entire frequency division multiplex, the resources for the physical signals of the IAB nodes between groups are set to the time division multiplex,

wherein the physical signal comprises at least an uplink physical signal.

8. The inter-IAB node resource allocation method of claim 7, wherein the step of setting the resources of the physical signals of the IAB nodes in each group to be all time division multiplexing or all frequency division multiplexing comprises:

when the resources of the physical signals of the IAB nodes in one group are set to be all time division multiplexing, allocating a first number of time domain resources different from other IAB nodes to each IAB node;

when the resource of the physical signal of the IAB node in one group is set to be full frequency division multiplexing, on the time domain resource where the resource of the physical signal is located, the bandwidth is divided into a plurality of frequency domain resources in which the segments are not overlapped with each other, and each IAB node is allocated with one segment of the frequency domain resources in the second segment.

9. The inter-IAB node resource allocation method of claim 7,

wherein, the time domain resource of the uplink physical signal is in the form of an absolute frame number, an absolute subframe number, an absolute time slot number and an absolute OFDM symbol number of the uplink physical signal resource, or the time domain resource of the uplink physical signal is in the form of a repetition period of the uplink physical signal resource and a relative frame number, a relative subframe number, a relative time slot number and a relative OFDM symbol number in the repetition period,

and/or, the form of the frequency domain resource of the uplink physical signal is at least one of the following: all physical resource block serial numbers of uplink physical signal resources of each frequency hopping or equivalent parameters of all physical resource block serial numbers can be calculated uniquely; the method comprises the steps of initially hopping all physical resource block sequence numbers of uplink physical signal resources or equivalent parameters which can uniquely calculate all physical resource block sequence numbers, wherein the initial hopping refers to a hopping starting point in a hopping period.

10. A physical signal transmission method for a terminal function entity of an IAB node, comprising:

determining resources needing to be avoided when receiving downlink signals and sending uplink signals;

and receiving the downlink physical signal and transmitting the uplink physical signal on resources other than the determined resource to be avoided.

11. The physical signal transmission method for a terminal function entity of an IAB node of claim 10,

further comprising: feeding back the downlink physical signal resource of the base station functional entity of the IAB node to the father node,

and/or, the resources to be avoided at least include time domain resources and frequency domain resources, and the time domain resources include at least one of the following: the frequency domain resource comprises at least one of the following frequency domain resources: the physical resource block number of the resource, the starting physical resource block number and the physical resource block number,

and/or, the determined resources to be avoided include uplink physical signal resources of the parent node terminal functional entity and downlink physical signal resources of the parent node base station functional entity, or the determined resources to be avoided include uplink physical signal resources of the parent node terminal functional entity and downlink physical signal resources of the parent node base station functional entity and downlink physical signal resources of the base station functional entity of the IAB node.

12. A method of physical signaling for a base station functional entity of an IAB node, comprising:

acquiring downlink physical signal resources of a base station functional entity of a child node;

and sending the downlink physical signal on resources except the acquired downlink physical signal resources of the base station functional entity of the child node.

13. A physical signaling apparatus for an IAB node, comprising:

a parameter acquisition unit configured to acquire configuration parameters for transmitting a physical signal; and

and the signal sending unit is configured to send the uplink physical signal sent by the terminal function entity of the IAB node and the downlink physical signal sent by the base station function entity of the IAB node on the same time domain resource according to the acquired configuration parameters when the uplink sending link of the terminal function entity, the downlink receiving link of the terminal function entity, the downlink sending link of the base station function entity and the uplink receiving link of the base station function entity of the IAB node carry out full duplex transmission with the same frequency at the same time.

14. An apparatus for allocating resources of a physical signal between IABs, comprising:

the first allocation unit is configured to group all the IAB nodes, and set the resources of the physical signals of the IAB nodes in each group to be all time division multiplexing or all frequency division multiplexing;

a second allocating unit configured to set resources of physical signals of inter-group IAB nodes to all groups that are all time division multiplexed, for resources of physical signals of intra-group IAB nodes to be frequency division multiplexed; and

a third allocating unit configured to set resources of physical signals of inter-group IAB nodes to all groups of all frequency division multiplexing for the resources of the physical signals of the intra-group IAB nodes, to time division multiplexing,

wherein the physical signal comprises at least an uplink physical signal.

15. A physical signaling apparatus for a terminal function entity of an IAB node, comprising:

a resource determining unit configured to determine a resource to be avoided when receiving a downlink signal and transmitting an uplink signal; and

and a first avoidance unit configured to receive the downlink physical signal and transmit the uplink physical signal on a resource other than the determined resource that needs to be avoided.

Technical Field

The present disclosure relates to the field of wireless communications. More specifically, the present disclosure relates to a method and an apparatus for transmitting a physical signal, and a method and an apparatus for allocating physical signal resources.

Background

In a conventional cellular network, a base station communicates directly with terminals located within its coverage area. Since 5G NR (New Radio) supports a millimeter wave frequency band with a higher frequency and the 5G NR supports a plurality of subcarrier intervals greater than 15kHz in consideration of service flexibility, the coverage area of a single 5G base station is relatively small. When a base station communicates with a UE at a longer distance, it often needs to relay with other devices. Therefore, 5G NR supports the IAB (Integrated Access and Backhaul) technology. There are two types of nodes in the IAB network, one is an IAB-node and the other is an IAB-node. The former functions as a base station in traditional cellular communication, and directly performs data interaction with other base stations or terminals in the coverage area of the former. The IAB-node has two functions, one is used as a terminal to communicate with other base stations, and the other is used as a base station to provide service for other base stations or terminals in the coverage area of the base station. Thus, in an IAB network there may be a data link starting from the IAB-donor and going through at least one IAB-node and finally to the terminal. To date, IAB technology only supports half-duplex communication. The problem of resource shortage for half-duplex communication is an important reason for limiting system capacity. In addition, the terminal function and the base station function of one IAB-node specified in the 5G NR are respectively realized by two sets of transceiver devices, that is, one IAB-node has two sets of entity devices to respectively realize the terminal function and the base station function of the IAB-node. The terminal implementing the IAB-node is called IAB-MT (Mobile-Termination), and the terminal implementing the base station is called IAB-DU (Donor Unit). For OTA (over-the-air) synchronization, the downlink timing of the IAB-DU of each IAB-node in the IAB network is perfectly aligned, i.e., each IAB-DU starts a downlink subframe at the same time.

With the rapid growth of mobile data services, especially the exponential growth of high definition video and ultra high definition video services, higher requirements are put on the transmission rate of wireless communication, and in order to meet the growing mobile service requirements, people need to put forward a new technology on the basis of 4G or 5G to further improve the transmission rate and throughput of a wireless communication system. The full-duplex technology can further improve the frequency spectrum utilization rate on the existing system, and the full-duplex system allows the uplink and downlink of a user to transmit simultaneously in the time domain and the frequency domain, so that the full-duplex system can theoretically reach twice the throughput of the half-duplex system, unlike the traditional half-duplex system which adopts time domain (time division duplex, TDD) or frequency domain (frequency division duplex, FDD) orthogonal division for the uplink and the downlink. Full-duplex equipment can simultaneously transmit and receive data on the same time-frequency resource, so that the full-duplex equipment has unique interference, namely self-interference, namely downlink signals transmitted by the equipment can be received by a receiving antenna of the equipment, and strong interference on uplink signals received at the same time and the same frequency is caused. Since the self-interference signal is directly received without spatial attenuation, the power of the self-interference signal is much higher than that of the uplink signal to be received, and if the self-interference signal is not deleted, the uplink signal cannot be correctly received. There is therefore a need for a reference signal for estimating the self-interference channel from the transmit antenna to the receive antenna.

The full duplex technology and the IAB technology are combined, so that the frequency spectrum utilization rate and the data throughput of a network can be effectively improved, and the method is an important option of the future 6G technology.

Disclosure of Invention

Exemplary embodiments of the present disclosure provide a method and an apparatus for transmitting a physical signal for an IAB node, a method and an apparatus for allocating a resource of a physical signal between IAB nodes, a method and an apparatus for transmitting a physical signal for a terminal function entity of an IAB node, and a method and an apparatus for transmitting a physical signal for a base station function entity of an IAB node, so as to effectively improve a spectrum utilization rate and a data throughput of a network.

According to an exemplary embodiment of the present disclosure, there is provided a physical signal transmission method for an IAB node, including: acquiring configuration parameters for transmitting physical signals; when a terminal function entity uplink sending link, a terminal function entity downlink receiving link, a base station function entity downlink sending link and a base station function entity uplink receiving link of the IAB node carry out full duplex transmission with the same frequency at the same time, sending an uplink physical signal sent by the terminal function entity of the IAB node and a downlink physical signal sent by the base station function entity of the IAB node on the same time domain resource according to the obtained configuration parameters.

Optionally, the physical signal may comprise at least one of: reference signals for self-interference channel estimation, demodulation reference signals, phase tracking reference signals and sounding reference signals.

Optionally, the configuration parameters for transmitting the physical signal may include an uplink physical signal parameter and a downlink physical signal parameter.

Optionally, the uplink physical signal parameter may include at least one of: cyclic shift amount information of an uplink physical signal, comb-shaped frequency domain resource structure information and comb-shaped frequency domain resource structure switching period information of the uplink physical signal, frequency hopping pattern information and frequency hopping switching interval information of the uplink physical signal, and frequency domain and time domain orthogonal cover code information of the uplink physical signal,

optionally, the downlink physical signal parameter may include at least one of: the information of the cyclic shift amount of the downlink physical signal, the information of the comb frequency domain resource structure and the switching period of the comb frequency domain resource structure of the downlink physical signal, the information of the frequency hopping pattern and the frequency hopping switching interval of the downlink physical signal, and the information of the frequency domain and the time domain orthogonal superposition code of the downlink physical signal.

Optionally, the downlink physical signal parameter may further include a physical root sequence number of the uplink physical signal sent by the terminal function entity of the IAB node.

Optionally, the step of sending, according to the obtained configuration parameter, the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource may include: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring different cyclic shift amounts for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; the uplink physical signal and the downlink physical signal to which different cyclic shift amounts are allocated are transmitted on the same time domain resource.

Optionally, the step of sending, according to the obtained configuration parameter, the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource may include: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a comb-shaped frequency domain resource structure for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; and sending the uplink physical signal and the downlink physical signal configured with different comb frequency domain resource structures on the same time domain resource.

Optionally, the step of sending, according to the obtained configuration parameter, the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource may include: configuring frequency hopping patterns for the uplink physical signals and the downlink physical signals according to the acquired configuration parameters; and transmitting the uplink physical signal and the downlink physical signal configured with different frequency hopping patterns on the same time domain resource.

Optionally, the step of sending, according to the obtained configuration parameter, the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource may include: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a frequency domain orthogonal superposition code and a time domain orthogonal superposition code for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; and sending the uplink physical signal and the downlink physical signal which are configured with different frequency domain and time domain orthogonal superposition codes on the same time domain resource.

According to an exemplary embodiment of the present disclosure, there is provided a resource allocation method for a physical signal between IAB nodes, including: grouping all IAB nodes, and setting the resources of the physical signals of the IAB nodes in each group as all time division multiplexing or all frequency division multiplexing; setting the resource of the physical signal of the IAB nodes in the groups as all groups of all time division multiplexing, and setting the resource of the physical signal of the IAB nodes in the groups as frequency division multiplexing; setting the resource of the physical signal of the IAB nodes in the group as all the groups of the whole frequency division multiplexing, and setting the resource of the physical signal of the IAB nodes in the group as the time division multiplexing, wherein the physical signal at least comprises an uplink physical signal.

Optionally, the step of setting the resource of the physical signal of the IAB node in each group to be full time division multiplexing or full frequency division multiplexing includes: when the resources of the physical signals of the IAB nodes in one group are set to be all time division multiplexing, allocating a first number of time domain resources different from other IAB nodes to each IAB node; when the resource of the physical signal of the IAB node in one group is set to be full frequency division multiplexing, on the time domain resource where the resource of the physical signal is located, the bandwidth is divided into a plurality of frequency domain resources in which the segments are not overlapped with each other, and each IAB node is allocated with one segment of the frequency domain resources in the second segment.

Optionally, the form of the time domain resource of the uplink physical signal may be an absolute frame number, an absolute subframe number, an absolute slot number, and an absolute OFDM symbol number of the uplink physical signal resource, or the form of the time domain resource of the uplink physical signal may be a repetition period of the uplink physical signal resource and a relative frame number, a relative subframe number, a relative slot number, and a relative OFDM symbol number in the repetition period.

Optionally, the form of the frequency domain resource of the uplink physical signal may be at least one of the following: all physical resource block serial numbers of uplink physical signal resources of each frequency hopping or equivalent parameters of all physical resource block serial numbers can be calculated uniquely; the method comprises the steps of initially hopping all physical resource block sequence numbers of uplink physical signal resources or equivalent parameters which can uniquely calculate all physical resource block sequence numbers, wherein the initial hopping refers to a hopping starting point in a hopping period.

According to an exemplary embodiment of the present disclosure, there is provided a physical signal transmission method for a terminal function entity of an IAB node, including: determining resources needing to be avoided when receiving downlink signals and sending uplink signals; and receiving the downlink physical signal and transmitting the uplink physical signal on resources other than the determined resource to be avoided.

Optionally, the resources to be avoided may include at least a time domain resource and a frequency domain resource, and the time domain resource may include at least one of the following: the frame number, the subframe number, the slot number or the OFDM symbol number, the starting OFDM symbol position and the number of OFDM symbols, and the frequency domain resource may include at least one of: the physical resource block number of the resource, the starting physical resource block number and the physical resource block number.

Optionally, the physical signal transmission method for the terminal function entity of the IAB node may further include: and feeding back the downlink physical signal resource of the base station functional entity of the IAB node to the father node.

Optionally, the determined resource to be avoided includes an uplink physical signal resource of the parent node terminal functional entity and a downlink physical signal resource of the parent node base station functional entity, or the determined resource to be avoided includes an uplink physical signal resource of the parent node terminal functional entity, a downlink physical signal resource of the parent node base station functional entity and a downlink physical signal resource of the base station functional entity of the IAB node.

According to an exemplary embodiment of the present disclosure, there is provided a physical signal transmission method for a base station functional entity of an IAB node, including: acquiring downlink physical signal resources of a base station functional entity of a child node; and sending the downlink physical signal on resources except the acquired downlink physical signal resources of the base station functional entity of the child node.

According to an exemplary embodiment of the present disclosure, there is provided a physical signal transmission apparatus for an IAB node, including: a parameter acquisition unit configured to acquire configuration parameters for transmitting a physical signal; and the signal sending unit is configured to send the uplink physical signal sent by the terminal function entity of the IAB node and the downlink physical signal sent by the base station function entity of the IAB node on the same time domain resource according to the acquired configuration parameters when the uplink sending link of the terminal function entity, the downlink receiving link of the terminal function entity, the downlink sending link of the base station function entity and the uplink receiving link of the base station function entity of the IAB node carry out full duplex transmission with the same frequency at the same time.

Optionally, the physical signal may comprise at least one of: reference signals for self-interference channel estimation, demodulation reference signals, phase tracking reference signals and sounding reference signals.

Optionally, the configuration parameters for transmitting the physical signal may include an uplink physical signal parameter and a downlink physical signal parameter.

Optionally, the uplink physical signal parameter may include at least one of: the method comprises the following steps of carrying out cyclic shift amount information on an uplink physical signal, comb frequency domain resource structure information and comb frequency domain resource structure switching period information on the uplink physical signal, frequency hopping pattern information and frequency hopping switching interval information on the uplink physical signal, and frequency domain and time domain orthogonal superposition code information on the uplink physical signal.

Optionally, the downlink physical signal parameter may include at least one of: the information of the cyclic shift amount of the downlink physical signal, the information of the comb frequency domain resource structure and the switching period of the comb frequency domain resource structure of the downlink physical signal, the information of the frequency hopping pattern and the frequency hopping switching interval of the downlink physical signal, and the information of the frequency domain and the time domain orthogonal superposition code of the downlink physical signal.

Optionally, the downlink physical signal parameter may further include a physical root sequence number of the uplink physical signal sent by the terminal function entity of the IAB node.

Optionally, the signal transmitting unit may be configured to: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring different cyclic shift amounts for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; the uplink physical signal and the downlink physical signal to which different cyclic shift amounts are allocated are transmitted on the same time domain resource.

Optionally, the signal transmitting unit may be configured to: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a comb-shaped frequency domain resource structure for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; and sending the uplink physical signal and the downlink physical signal configured with different comb frequency domain resource structures on the same time domain resource.

Optionally, the signal transmitting unit may be configured to: configuring frequency hopping patterns for the uplink physical signals and the downlink physical signals according to the acquired configuration parameters; and transmitting the uplink physical signal and the downlink physical signal configured with different frequency hopping patterns on the same time domain resource.

Optionally, the signal transmitting unit may be configured to: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a frequency domain orthogonal superposition code and a time domain orthogonal superposition code for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; and sending the uplink physical signal and the downlink physical signal which are configured with different frequency domain and time domain orthogonal superposition codes on the same time domain resource.

According to an exemplary embodiment of the present disclosure, there is provided an apparatus for resource allocation of a physical signal between IAB nodes, including: the first allocation unit is configured to group all the IAB nodes, and set the resources of the physical signals of the IAB nodes in each group to be all time division multiplexing or all frequency division multiplexing; a second allocating unit configured to set resources of physical signals of inter-group IAB nodes to all groups that are all time division multiplexed, for resources of physical signals of intra-group IAB nodes to be frequency division multiplexed; and a third allocating unit configured to set the resources of the physical signals of the inter-group IAB nodes to time division multiplexing for all groups in which the resources of the physical signals of the intra-group IAB nodes are set to all frequency division multiplexing, wherein the physical signals at least include uplink physical signals.

Optionally, the first allocation unit is configured to: when the resources of the physical signals of the IAB nodes in one group are set to be all time division multiplexing, allocating a first number of time domain resources different from other IAB nodes to each IAB node; when the resource of the physical signal of the IAB node in one group is set to be full frequency division multiplexing, on the time domain resource where the resource of the physical signal is located, the bandwidth is divided into a plurality of frequency domain resources in which the segments are not overlapped with each other, and each IAB node is allocated with one segment of the frequency domain resources in the second segment.

Optionally, the form of the time domain resource of the uplink physical signal may be an absolute frame number, an absolute subframe number, an absolute slot number, and an absolute OFDM symbol number of the uplink physical signal resource, or the form of the time domain resource of the uplink physical signal may be a repetition period of the uplink physical signal resource and a relative frame number, a relative subframe number, a relative slot number, and a relative OFDM symbol number in the repetition period.

Optionally, the form of the frequency domain resource of the uplink physical signal may be at least one of the following: all physical resource block serial numbers of uplink physical signal resources of each frequency hopping or equivalent parameters of all physical resource block serial numbers can be calculated uniquely; the method comprises the steps of initially hopping all physical resource block sequence numbers of uplink physical signal resources or equivalent parameters which can uniquely calculate all physical resource block sequence numbers, wherein the initial hopping refers to a hopping starting point in a hopping period.

According to an exemplary embodiment of the present disclosure, there is provided a physical signal transmission apparatus for a terminal function entity of an IAB node, including: a resource determining unit configured to determine an uplink physical signal resource and a downlink physical signal resource of a resource acquisition parent node that need to be avoided when receiving a downlink signal and transmitting an uplink signal; and a first transmission unit configured to receive the downlink physical signal and transmit the uplink physical signal on a resource other than the uplink physical signal resource and the downlink physical signal resource of the parent node acquired by the determined resource needing to be avoided.

Optionally, the resources to be avoided may include at least a time domain resource and a frequency domain resource, and the time domain resource may include at least one of the following: the frame number, the subframe number, the slot number or the OFDM symbol number, the starting OFDM symbol position and the number of OFDM symbols, and the frequency domain resource may include at least one of: the physical resource block number of the resource, the starting physical resource block number and the physical resource block number.

Optionally, the physical signal transmission apparatus for an end function entity of an IAB node may further include: and the resource feedback unit is configured to feed back the downlink physical signal resource of the base station functional entity of the IAB node to the father node.

Optionally, the determined resource to be avoided includes an uplink physical signal resource of the parent node terminal functional entity and a downlink physical signal resource of the parent node base station functional entity, or the determined resource to be avoided includes an uplink physical signal resource of the parent node terminal functional entity, a downlink physical signal resource of the parent node base station functional entity and a downlink physical signal resource of the base station functional entity of the IAB node.

According to an exemplary embodiment of the present disclosure, there is provided a physical signal transmission apparatus for a base station functional entity of an IAB node, including: a resource obtaining unit configured to obtain a downlink physical signal resource of a base station functional entity of a child node; and a second transmission unit configured to transmit the downlink physical signal on a resource other than the acquired downlink physical signal resource of the base station functional entity of the child node.

According to an exemplary embodiment of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a physical signal transmission method for an IAB node, a resource allocation method for a physical signal between IAB nodes, a physical signal transmission method for a terminal function entity of an IAB node, or a physical signal transmission method for a base station function entity of an IAB node according to an exemplary embodiment of the present disclosure.

According to an exemplary embodiment of the present disclosure, there is provided a computing apparatus including: a processor; a memory storing a computer program which, when executed by the processor, implements a physical signal transmission method for an IAB node, a resource allocation method for a physical signal between IAB nodes, a physical signal transmission method for a terminal function entity of the IAB node, or a physical signal transmission method for a base station function entity of the IAB node according to an exemplary embodiment of the present disclosure.

According to the physical signal transmission method and device for the IAB node, through orthogonal resource division, when a terminal function entity uplink transmission link, a terminal function entity downlink receiving link, a base station function entity downlink transmission link and a base station function entity uplink receiving link of the IAB node carry out simultaneous co-frequency full duplex transmission, an uplink physical signal sent by the terminal function entity of the IAB node and a downlink physical signal sent by the base station function entity of the IAB node are sent on the same time domain resource according to the acquired configuration parameters, so that the time domain resource is saved, and the throughput of an IAB system is improved.

According to the method and the device for allocating the resources of the physical signals among the IAB nodes, all the IAB nodes are grouped, and the resources of the physical signals of the IAB nodes in each group are set to be all time division multiplexing or all frequency division multiplexing; setting the resource of the physical signal of the IAB nodes in the groups as all groups of all time division multiplexing, and setting the resource of the physical signal of the IAB nodes in the groups as frequency division multiplexing; the resources of the physical signals of the IAB nodes in the groups are set to all groups of all frequency division multiplexing, and the resources of the physical signals of the IAB nodes in the groups are set to time division multiplexing, so that the orthogonal resources are distributed to all the IAB nodes, and the signal interference is avoided.

According to the physical signal transmission method and device for the terminal function entity of the IAB node in the exemplary embodiment of the present disclosure, by acquiring the uplink physical signal resource and the downlink physical signal resource of the parent node, the downlink physical signal is received and the uplink physical signal is transmitted on the resource other than the acquired uplink physical signal resource and the downlink physical signal resource of the parent node, so as to avoid the resource, thereby achieving self-interference cancellation.

According to the physical signal transmission method and device for the base station functional entity of the IAB node in the exemplary embodiments of the present disclosure, the downlink physical signal resource of the base station functional entity of the sub-node is acquired, and the downlink physical signal is sent on the resource other than the acquired downlink physical signal resource of the base station functional entity of the sub-node, so as to avoid the resource, thereby achieving self-interference cancellation.

Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.

Drawings

The above and other objects and features of the exemplary embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate exemplary embodiments, wherein:

FIG. 1 shows a schematic diagram of an air interface link in an IAB scenario;

fig. 2 illustrates a flowchart of a physical signal transmission method for an IAB node according to an exemplary embodiment of the present disclosure;

fig. 3 shows a schematic diagram of a comb structure mapping pattern of self-interference reference signals within an IAB node in an IAB scenario;

FIG. 4 shows a schematic diagram of an intra-IAB self-interference reference signal frequency hopping pattern in an IAB scenario;

fig. 5 illustrates a flowchart of a resource allocation method of a physical signal between IAB nodes according to an exemplary embodiment of the present disclosure;

fig. 6a shows a schematic diagram of an example of resource allocation of time division multiplexed physical signals between IAB nodes, according to an example embodiment of the present disclosure;

fig. 6b is a diagram illustrating an example of resource allocation of physical signals between frequency division multiplexed (frequency hopping) IAB nodes according to an exemplary embodiment of the present disclosure;

fig. 7 shows a flowchart of a physical signal transmission method for a terminal function entity of an IAB node according to an exemplary embodiment of the present disclosure;

fig. 8 illustrates a flowchart of a physical signal transmission method for a base station functional entity of an IAB node according to an exemplary embodiment of the present disclosure;

fig. 9 shows a block diagram of a physical signaling apparatus for an IAB node according to an example embodiment of the present disclosure;

fig. 10 is a block diagram illustrating a resource allocation apparatus for physical signals between IAB nodes according to an exemplary embodiment of the present disclosure;

fig. 11 shows a block diagram of a physical signal transmission apparatus of a terminal function entity for an IAB node according to an exemplary embodiment of the present disclosure;

fig. 12 shows a block diagram of a physical signal transmission arrangement of a base station functional entity for an IAB node according to an example embodiment of the present disclosure; and

fig. 13 shows a schematic diagram of a computing device according to an example embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present disclosure by referring to the figures.

Fig. 1 shows a schematic diagram of an air interface link in an IAB scenario. In a full-duplex IAB node, there are 4 air interface links, as shown in fig. 1, a downlink (denoted as DL2) from a transmitting end of an IAB-DU to a terminal or a receiving end of a child node IAB-MT, an uplink (denoted as UL2) from the transmitting end of the child node IAB-MT to the receiving end of the IAB-DU, a downlink (denoted as DL1) from the transmitting end of the IAB-doror parent node IAB-DU to the receiving end of the IAB-MT, and an uplink (denoted as UL1) from the IAB-MT to the receiving end of the IAB-doror parent node IAB-DU, respectively. The invention aims at a scene of carrying out four-air interface link full duplex transmission, namely carrying out data transmission on DL1, DL2, UL1 and UL2 on the same time-frequency resource. It should be noted that the present disclosure is also applicable to two simplified scenarios, i.e., full duplex transmission of DL1 with DL2 and full duplex transmission of UL1 with UL 2.

Since the cell-level parameters of the IAB-MT are given by the IAB-node or the parent node IAB-DU to which the IAB-MT is connected, and the parameters of the IAB-DUs of all the IAB nodes are given by the IAB-node, if the prior art is adopted, different root sequence numbers are used for the uplink physical signal sent by the IAB-MT and the downlink physical signal sent by the IAB-DU in the same IAB node. Depending on the nature of the ZC sequence, if two reference signals are generated from different physical root sequence numbers, their correlation values are inversely proportional to the sequence length regardless of the cyclic shift selection of the two reference signals. Therefore, ZC sequences (or cyclically shifted signals) generated from different numbers of physical root sequences have certain orthogonality, and the longer the sequence length is, the better the orthogonality is. However, orthogonality of ZC sequences of different root sequence numbers is limited by the sequence length and two reference signals cannot be truly completely orthogonalized, so orthogonality is weaker than that provided by cyclic shift. Self-interference cancellation requires extremely high self-interference channel estimation accuracy, so adopting this method may affect the self-interference cancellation capability.

Fig. 2 illustrates a flowchart of a physical signal transmission method for an IAB node according to an exemplary embodiment of the present disclosure.

Referring to fig. 2, in step S201, configuration parameters for transmitting a physical signal are acquired.

In an exemplary embodiment of the present disclosure, the physical signal comprises at least one of the following physical signals: reference signals for self-interference channel estimation, demodulation reference signals, phase tracking reference signals, sounding reference signals, etc. In the exemplary embodiments of the present disclosure, reference signals for self-interference channel estimation are taken as an example for explanation.

In an exemplary embodiment of the present disclosure, the configuration parameters for transmitting the physical signal include an uplink physical signal parameter and a downlink physical signal parameter.

In an exemplary embodiment of the present disclosure, the uplink physical signal parameter includes, but is not limited to, at least one of: the method comprises the following steps of carrying out cyclic shift amount information on an uplink physical signal, comb frequency domain resource structure information and comb frequency domain resource structure switching period information on the uplink physical signal, frequency hopping pattern information and frequency hopping switching interval information on the uplink physical signal, and frequency domain and time domain orthogonal superposition code information on the uplink physical signal.

In an exemplary embodiment of the present disclosure, the downlink physical signal parameter includes, but is not limited to, at least one of: the information of the cyclic shift amount of the downlink physical signal, the information of the comb frequency domain resource structure and the switching period of the comb frequency domain resource structure of the downlink physical signal, the information of the frequency hopping pattern and the frequency hopping switching interval of the downlink physical signal, and the information of the frequency domain and the time domain orthogonal superposition code of the downlink physical signal.

In an exemplary embodiment of the present disclosure, the downlink physical signal parameter further includes a physical root sequence number of an uplink physical signal sent by the terminal function entity of the IAB node.

Specifically, the IAB-MT acquires configuration parameters for transmitting an uplink physical signal, and the IAB-DU of the IAB node acquires configuration parameters for transmitting a downlink physical signal. The uplink physical signal for self-interference channel estimation may be denoted as UL SI-RS, and the downlink physical signal for self-interference channel estimation may be denoted as DL SI-RS.

The uplink physical signal parameter at least includes one of the following: the information of the UL SI-RS cyclic shift amount, the information of the comb-shaped frequency domain resource structure and the information of the comb-shaped frequency domain resource structure switching period of the UL SI-RS, the information of the frequency hopping pattern and the information of the frequency hopping switching interval of the UL SI-RS, and the information of the orthogonal superposition code (OCC sequence) of the frequency domain and the time domain used by the UL SI-RS.

The UL SI-RS cyclic shift amount information indicates the cyclic shift amount used by the UL SI-RS, for example, the UL SI-RS cyclic shift amount information may have two optional values of 0 and 1, where 0 indicates that the UL SI-RS cyclic shift amount is 0, and 1 indicates that the UL SI-RS uses a cyclic shift amount that is half the length of the UL SI-RS.

The comb frequency domain resource structure information indicates that the UL SI-RS performs resource mapping on odd numbered subcarriers or performs resource mapping on even numbered subcarriers within the bandwidth where the UL SI-RS is located, and the comb frequency domain resource structure switching period information indicates a switching period of the comb frequency domain resource structure used by the UL SI-RS, for example, the comb frequency domain resource structure switching period information may be 2 bits, "00" indicates no switching, "01" indicates switching with a slot as a period, "10" indicates switching with a subframe as a period, and "11" indicates switching with a frame as a period.

The hopping pattern information indicates the hopping pattern used by the UL SI-RS, and the hopping switching interval information indicates the time interval between two times of hopping by the UL SI-RS, for example, the hopping switching interval information may have four optional values, 0 indicates no switching, 1 indicates a time interval of a slot, 2 indicates a time interval of a subframe, and 3 indicates a time interval of a frame.

The orthogonal cover code information indicates orthogonal cover codes of a frequency domain and a time domain used by the UL SI-RS, and the orthogonal cover code information may indicate OCC sequences used in the frequency domain and the time domain with 2 bits, respectively, "00" indicates that an OCC sequence is not used, "01" indicates that an OCC sequence used is [ 11 ], and "10" indicates that an OCC sequence used is [ 1-1 ].

The IAB-MT may explicitly acquire the uplink physical signal parameters, or implicitly acquire the uplink physical signal parameters. The explicit obtaining of the uplink physical signal parameter may be implemented by at least one of the following two ways: the first explicit acquisition mode is to acquire from the higher layer signaling when establishing Radio Resource Control (RRC) connection, and add Information Element (IE) indicating uplink physical signal parameters to the higher layer signaling. The second explicit acquisition method is to acquire from the downlink control information from the IAB-Donor the parent node IAB-DU, and a field indicating the uplink physical signal parameter needs to be added to the downlink control information. The implicit acquisition of the uplink physical signal parameters can be realized by using preset parameters.

The downlink physical signal parameter should contain a physical root sequence number of the same IAB node, IAB-MT, and should also contain at least one of the following: cyclic shift amount information used by the DL SI-RS, comb frequency domain resource structure information and comb frequency domain resource structure switching period information of the DL SI-RS, frequency hopping pattern information and frequency hopping switching interval information of the DL SI-RS, and frequency domain and time domain orthogonal superposition code (OCC sequence) information used by the DL SI-RS.

The cyclic shift amount information indicates the cyclic shift amount used by the DL SI-RS, and for example, the cyclic shift amount information may have two selectable values of 0 and 1, where 0 indicates that the cyclic shift amount used by the DL SI-RS is 0 and 1 indicates that the cyclic shift amount used by the DL SI-RS is half the length of the DL SI-RS.

The comb frequency domain resource structure information indicates that the DL SI-RS performs resource mapping on odd numbered subcarriers or performs resource mapping on even numbered subcarriers within the bandwidth where the DL SI-RS is located, and the comb frequency domain resource structure switching period information indicates the switching period of the comb frequency domain resource structure used by the DL SI-RS, for example, the comb frequency domain resource structure switching period information may be 2 bits, "00" indicates no switching, "01" indicates switching with the slot as the period, "10" indicates switching with the subframe as the period, and "11" indicates switching with the frame as the period.

The hopping pattern information indicates the hopping pattern used by the DL SI-RS, and the hopping switching interval information indicates the time interval between two times of hopping by the DL SI-RS, for example, the hopping switching interval information may have four optional values, 0 indicates no switching, 1 indicates a time interval of slot, 2 indicates a time interval of subframe, and 3 indicates a time interval of frame.

The orthogonal cover code information indicates orthogonal cover codes of a frequency domain and a time domain used by the DL SI-RS, the orthogonal cover code information may indicate OCC sequences used in the frequency domain and the time domain with 2 bits, respectively, "00" indicates that an OCC sequence is not used, "01" indicates that an OCC sequence used is [ 11 ], and "10" indicates that an OCC sequence used is [ 1-1 ].

The IAB-DU of the IAB node may explicitly acquire the downlink physical signal parameters or implicitly acquire the downlink physical signal parameters. The explicit acquisition of the downlink physical signal parameter may be obtained from the higher layer signaling or downlink control information of the IAB-Donor parent node IAB-DU, or may be obtained from the same IAB node IAB-MT. The implicit acquisition of the downlink physical signal parameters can be realized by using preset parameters.

In step S202, when the terminal functional entity uplink transmission link, the terminal functional entity downlink receiving link, the base station functional entity downlink transmission link, and the base station functional entity uplink receiving link of the IAB node perform full duplex transmission with the same frequency at the same time, the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node are sent on the same time domain resource according to the acquired configuration parameters.

In an exemplary embodiment of the present disclosure, when an uplink physical signal transmitted by a terminal functional entity of the IAB node and a downlink physical signal transmitted by a base station functional entity of the IAB node are transmitted on the same time domain resource according to the obtained configuration parameter, when waveforms of the uplink physical signal and the downlink physical signal are the same, different cyclic shift amounts may be first configured for the uplink physical signal and the downlink physical signal according to the obtained configuration parameter, and then the uplink physical signal and the downlink physical signal configured with the different cyclic shift amounts may be transmitted on the same time domain resource.

In the exemplary embodiment of the present disclosure, when the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node are sent on the same time domain resource according to the obtained configuration parameter, when waveforms of the uplink physical signal and the downlink physical signal are the same, different frequency domain comb resource structures may be first configured for the uplink physical signal and the downlink physical signal according to the obtained configuration parameter, and then the uplink physical signal and the downlink physical signal configured with the comb frequency domain resource structures may be sent on the same time domain resource.

In an exemplary embodiment of the present disclosure, when the uplink physical signal sent by the terminal function entity of the IAB node and the downlink physical signal sent by the base station function entity of the IAB node are sent on the same time domain resource according to the obtained configuration parameters, different frequency hopping patterns may be first configured for the uplink physical signal and the downlink physical signal according to the obtained configuration parameters, and then the uplink physical signal and the downlink physical signal configured with the frequency hopping patterns may be sent on the same time domain resource.

In the exemplary embodiment of the present disclosure, when the uplink physical signal sent by the terminal functional entity of the IAB node and the downlink physical signal sent by the base station functional entity of the IAB node are sent on the same time domain resource according to the obtained configuration parameter, when the waveforms of the uplink physical signal and the downlink physical signal are the same, different frequency domain and time domain orthogonal superposition codes may be first configured for the uplink physical signal and the downlink physical signal according to the obtained configuration parameter, and then the uplink physical signal and the downlink physical signal configured with the frequency domain and time domain orthogonal superposition codes may be sent on the same time domain resource.

Specifically, the UL SI-RS transmitted by the IAB-MT and the DL SI-RS transmitted by the same IAB node IAB-DU are on the same time domain resource, and the orthogonal resource division of the UL SI-RS and the DL SI-RS can be carried out by adopting a non-time domain division mode. The implementation mode of the non-time domain orthogonal resource division is at least one of the following modes: the first is to adopt cyclic shift to perform orthogonal resource division of UL SI-RS and DL SI-RS in the same IAB node, that is, UL SI-RS and DL SI-RS are generated by the same basic sequence through different cyclic shifts, and when performing self-interference channel estimation, self-interference channels experienced by UL SI-RS and DL SI-RS can be orthogonally distinguished in a transform domain. The second is to perform orthogonal resource division of UL SI-RS and DL SI-RS in the same IAB node in the frequency domain, which can be implemented by frequency hopping or by adopting a comb structure (i.e., UL SI-RS is transmitted on odd subcarriers or even subcarriers in the bandwidth, and DL SI-RS is transmitted on the remaining subcarriers). And thirdly, orthogonal resource division of UL SI-RS and DL SI-RS in the same IAB node is carried out by adopting a code division mode, namely different orthogonal codes are adopted for the UL SI-RS of the IAB-MT and the DL SI-RS of the same IAB node IAB-DU.

(1) Enhancing orthogonality of UL SI-RS and DL SI-RS with cyclic shifts

In the same IAB node, the cyclic shift amount indicated by UL SI-RS cyclic shift amount information in uplink physical signal parameters received by the IAB-MT is different from the cyclic shift amount indicated by DL SI-RS cyclic shift amount information in downlink self-interference channel estimation reference signal parameters received by the IAB-DU, so that the orthogonality of the UL SI-RS and the DL SI-RS is enhanced.

If multiple reference signals are generated from the same base sequence and have different cyclic shifts, the cyclic shifts can provide good orthogonality for the reference signals, and when the length of the reference signals is long enough and the difference in the cyclic shifts of the reference signals is large enough, the orthogonality provided by the cyclic shifts can be good enough, and thus is often used to increase the capacity of the reference signals (i.e., transmit more reference signals on the same resource). In both 4G LTE and 5G NR systems, ZC sequences are selected as the base sequence of reference signals for channel estimation, and therefore the present patent is also described with reference signals generated by ZC sequences. In addition, objects scattering the self-interference signal are often near the antenna, so the multi-path ratio of the self-interference channel is small and fixed. The measured data shows that the time delay expansion of the self-interference channel is very small, and the energy corresponding to the time domain impulse of the channel is concentrated in a very small range near the main path. Therefore, if cyclic shift is adopted for reference signal orthogonalization, good enough orthogonality can be provided, and self-interference channels experienced by UL SI-RS and DL SI-RS can be separated without interference, so that the accuracy of self-interference channel estimation can be ensured.

When full duplex transmission of completely simultaneous co-frequency is performed between the IAB-MT and the IAB-DU, that is, when four links of UL1, UL2, DL1 and DL2 exist simultaneously and occupy the same frequency resource in fig. 1, the UL SI-RS transmitted by the IAB-MT and the DL SI-RS transmitted by the IAB-DU have the same length and frequency domain position, and if the UL SI-RS and the DL SI-RS are generated from the same physical root sequence number and have a sufficiently large time domain cyclic shift compared with the self-interference channel delay spread, after performing least square channel estimation of the frequency domain self-interference channel, two reference signals can be separated in the time domain (the domain where fourier transform or inverse fourier transform of the frequency domain is located) without affecting the accuracy of the respective self-interference channel estimation. To achieve the maximum cyclic shift interval, the cyclic shift amounts of UL SI-RS and DL SI-RS should differ by L/2, where L is the reference signal length.

If Cyclic shift discrimination is used to enhance the orthogonality of UL SI-RS and DL SI-RS, then the waveforms of IAB-MT and IAB-DU must be the same, or both CP-OFDM (Cyclic Prefix-OFDM), or both DFT-OFDM (Discrete Fourier Transform-OFDM), or both some other waveform, otherwise UL SI-RS and DL SI-RS cannot be discriminated from each other. For example, if the UL SI-RS transmitted by the IAB-MT and the DL SI-RS transmitted by the IAB-DU use CP-OFDM and DFT-OFDM, respectively, the DL SI-RS will have one more DFT operation than the UL SI-RS, and thus in the time domain, the energy of the least-squares channel estimation result obtained by the DL SI-RS will be dispersed to the entire time domain, and channel separation cannot be performed.

(2) Enhancing UL SI-RS and DL SI-RS orthogonality using comb frequency domain resource structures

In the same IAB node, when UL SI-RS comb-shaped frequency domain resource structure information in uplink physical signal parameters acquired by IAB-MT indicates that UL SI-RS performs resource mapping on odd (or even) numbered subcarriers, DL SI-RS comb-shaped frequency domain resource structure information in downlink physical signal parameters acquired by IAB-DU indicates DL SI-RS performs resource mapping on even (or odd) numbered subcarriers, and the switching periods indicated by the comb-shaped frequency domain resource structure switching period information of IAB-MT and IAB-DU are the same, the orthogonality of UL SI-RS and DL SI-RS is enhanced.

As mentioned earlier, the delay spread of the self-interfering channel is small. Since the coherence bandwidth of the channel is inversely proportional to the delay spread, the coherence bandwidth of the self-interference channel is large, and the SI-RS can be transmitted with a lower frequency domain density without affecting the accuracy of the channel estimation. Therefore, taking the comb frequency domain resource structure switching period as one sub-frame as an example, the UL SI-RS and DL SI-RS can perform comb pattern transmission in the manner shown in fig. 3. Fig. 3 shows a schematic diagram of a comb structure mapping pattern of self-interference reference signals within an IAB node in an IAB scenario. If there are multiple segments of time domain resources for transmitting reference signals in a subframe, the comb structures of the multiple segments of time domain resources for transmitting reference signals can be alternated to ensure the accuracy of self-interference channel interpolation (the channel on the data symbol obtained by the channel on the pilot symbol needs to be subjected to time domain interpolation).

Similar to the case of using cyclic shift to enhance the orthogonality of the UL SI-RS and the DL SI-RS, if the orthogonality of the UL SI-RS and the DL SI-RS is enhanced by using a comb structure, the waveforms of the UL SI-RS and the DL SI-RS must be the same, otherwise, channel separation cannot be performed.

(3) Enhancing orthogonality of UL SI-RS and DL SI-RS using frequency hopping

In the same IAB node, if the frequency hopping pattern acquired by the IAB-MT is different from the frequency hopping pattern acquired by the IAB-DU, and the switching intervals of the frequency hopping patterns acquired by the IAB-MT and the IAB-DU are the same, the orthogonality of the UL SI-RS and the DL SI-RS is enhanced.

If the time-varying property of the self-interference channel is weak, the UL SI-RS and the DL SI-RS can also cover the bandwidth in a frequency hopping mode. For example, fig. 4 shows a schematic diagram of a self-interference reference signal frequency hopping pattern in an IAB node in an IAB scenario, as shown in fig. 4, an IAB-MT transmits a UL SI-RS on a lower half-bandwidth frequency resource, an IAB-DU transmits a DL SI-RS on a higher half-bandwidth frequency resource, and then resource mapping positions are exchanged on an even numbered subframe or slot, in odd numbered subframes or slots.

When the time-varying property of the self-interference channel is strong, the orthogonality of the UL SI-RS and the DL SI-RS cannot be enhanced by adopting frequency hopping, otherwise, the estimation precision of the self-interference channel is influenced.

(4) Method for enhancing orthogonality of UL SI-RS and DL SI-RS by adopting time domain OCC sequence or frequency domain OCC sequence or time-frequency domain two-dimensional OCC sequence

In the same IAB node, the frequency domain OCC sequence acquired by the IAB-MT is different from the frequency domain OCC sequence acquired by the IAB-DU, or the time domain OCC sequence acquired by the IAB-MT is different from the time domain OCC sequence acquired by the IAB-DU, so that the orthogonality of the UL SI-RS and the DL SI-RS is enhanced.

The OCC sequence may also be used to provide orthogonality when the time or frequency domain variation of the channel is not significant. However, when the self-interference channel has significant time-varying or frequency fading, the orthogonality provided by using the OCC sequence may be reduced, and in severe cases, the separation of the channel and the channel estimation accuracy may be significantly affected. In addition, the use of time-domain OCC sequences or frequency-domain OCC sequences or time-frequency-domain two-dimensional OCC sequences to enhance the orthogonality of UL SI-RS and DL SI-RS also requires that UL SI-RS and DL SI-RS use the same waveform.

The link of the IAB is a link starting from the IAB-donor, going through several IAB nodes, and finally reaching the terminal, on which there may be several IAB nodes. How to reasonably allocate the resources of the SI-RS between the IAB nodes is a key problem for full duplex transmission of each IAB node on the link.

The link of the IAB is a link starting from the IAB-donor, going through several IAB nodes, and finally reaching the terminal, on which there may be several IAB nodes. How to reasonably allocate the resources of the SI-RS between the IAB nodes is a key problem for full duplex transmission of each IAB node on the link. Here, the method for allocating SI-RS resources in the IAB node is not limited, and the method for allocating resources in the IAB node in the first embodiment may be used, or another method for allocating resources in the IAB node may be used. In the exemplary embodiment of the disclosure, when the resource allocation of the physical signal between the IABs nodes is performed, all the resources occupied by the UL SI-RS resource and the DL SI-RS resource of one IAB node in one transmission period are taken as an inseparable whole, which is called as the SI-RS resource of the IAB node. In one transmission period, each IAB node is assumed to use M OFDM symbols for self-interference channel estimation, and in the M OFDM symbols, the UL SI-RS transmitted by the terminal or the IAB-MT and the DL SI-RS transmitted by the IAB-donor the IAB-DU may be on the same symbol or different symbols. In an exemplary embodiment of the present disclosure, each IAB node may be allocated orthogonal resources so that the reference signal resources (i.e., UL SI-RS resources) used for self-interference channel estimation by the terminal or each IAB node IAB-MT and the reference signal resources (i.e., DL SI-RS resources) used for self-interference channel estimation by the IAB-node or each IAB node IAB-DU do not interfere with each other.

Fig. 5 illustrates a flowchart of a resource allocation method of a physical signal between IAB nodes according to an exemplary embodiment of the present disclosure. Fig. 6a illustrates a schematic diagram of an example of resource allocation of time division multiplexed physical signals between IAB nodes according to an exemplary embodiment of the present disclosure. Fig. 6b illustrates a schematic diagram of an example of resource allocation of physical signals between frequency division multiplexed (frequency hopping) IAB nodes according to an exemplary embodiment of the present disclosure.

Referring to fig. 5, in step S501, all IAB nodes are grouped, and resources of physical signals of the IAB nodes in each group are set to be all time division multiplexing or all frequency division multiplexing. Here, the physical signal includes at least an uplink physical signal.

As shown in fig. 6a, when the resources of the physical signal of all IAB nodes are all time division multiplexed, each IAB node is allocated a first number of time domain resources different from other IAB nodes, i.e., each IAB node is allocated a first number of OFDM symbols different from other nodes for self-interference channel estimation.

Assuming that K IAB nodes perform full duplex transmission, the SI-RS resources of the K IAB nodes may be on the same time domain resource, but are orthogonally divided in a frequency division multiplexing manner. Namely, on the time domain resource where the SI-RS resource is located, the bandwidth is divided into K frequency domain resources which are not overlapped with each other, and each IAB node sends a self-interference reference signal (UL SI-RS and/or DL SI-RS) for self-interference channel estimation on one of the frequency domain resources. In order to ensure that each IAB node can acquire the self-interference channel characteristics in the whole bandwidth, frequency hopping should be adopted. As shown in fig. 6b, when the resources of the physical signals of all the IAB nodes are frequency division multiplexed, on the time domain resource where the resource of the physical signal is located, the bandwidth is divided into a plurality of frequency domain resources, which are mutually non-overlapping, and each IAB node is allocated a segment of frequency domain resource in the second plurality of segments.

In the hopping pattern shown in fig. 6b, the bandwidth is divided into K non-overlapping subbands, and each IAB node transmits UL SI-RS and/or DL SI-RS on only one of the subbands in each subframe. Each IAB node then transmits UL SI-RS and/or DL SI-RS on a segment of unused subbands thereafter for each subframe. Thus, over K subframes, the SI-RS resources of each IAB node can traverse the entire bandwidth. In the K +1 th subframe, the frequency domain position of the SI-RS resource of each IAB node is the same as that in the 1 st subframe, and the process is repeated. Sub-band resource used by ith IAB node in jth sub-frameThe source number can be calculated by the following formula: s_i,jMod (i + j, K), where 0 ≦ i<K, j ≧ 0, mod (·) denotes the operation of taking the modulus value.

In an exemplary embodiment of the present disclosure, the time domain resource of the uplink physical signal may be in the form of an absolute frame number, an absolute subframe number, an absolute slot number, and an absolute OFDM symbol number of the uplink physical signal resource, or the time domain resource of the uplink physical signal may be in the form of a repetition period of the uplink physical signal resource and a relative frame number, a relative subframe number, a relative slot number, and a relative OFDM symbol number within the repetition period.

In an exemplary embodiment of the present disclosure, the frequency domain resource of the uplink physical signal is in the form of at least one of: all physical block (PRB) serial numbers of uplink physical signal resources of each frequency hopping or equivalent parameters capable of uniquely calculating all PRB serial numbers; the method comprises the steps of initially hopping all PRB serial numbers of uplink physical signal resources or equivalent parameters which can uniquely calculate all PRB serial numbers, wherein the initial hopping refers to a hopping starting point in one hopping period.

In step S502, resources for physical signals of intra-group IAB nodes are set to all groups that are all time-division multiplexed, and resources for physical signals of inter-group IAB nodes are set to be frequency-division multiplexed.

In step S503, resources for physical signals of intra-group IAB nodes are set to all groups of the entire frequency division multiplexing, and resources for physical signals of inter-group IAB nodes are set to the time division multiplexing.

After accessing the IAB-donor the parent node IAB-DU, the terminal or the IAB-MT acquires the time-frequency domain position of the resource (i.e., UL SI-RS resource) for self-interference channel estimation from the IAB-donor the parent node IAB-DU, and transmits a reference signal UL SI-RS for self-interference channel estimation on the resource.

Specifically, the UL SI-RS time domain resource acquired by the terminal or the IAB-MT from the IAB-donor the parent node IAB-DU is in the form of at least one of the following: the first form is the absolute frame number, absolute subframe number, absolute slot number, and absolute OFDM number of the UL SI-RS resource. The second form is the repetition period of the UL SI-RS resource and the relative frame number, relative subframe number, relative slot number and relative OFDM symbol number within the repetition period. The UL SI-RS frequency domain resource acquired by the terminal or the IAB-MT from the IAB-donor the parent node IAB-DU is at least one of the following forms: the first form is the whole PRB sequence number of the UL SI-RS resource for each frequency hopping or the equivalent parameter that can uniquely calculate the whole PRB sequence number, such as the sequence number and the number of the first PRB of the UL SI-RS resource, or the subband sequence number in a certain preset subband division manner. The second is the total PRB number of the UL SI-RS resource for initial frequency hopping or equivalent parameters that can uniquely calculate the total PRB number, such as the number and number of the first PRB, or the subband number. It should be noted that, firstly, the initial frequency hopping refers to the beginning of the frequency hopping within one frequency hopping period, and secondly, when the second form is adopted, the frequency hopping pattern needs to be additionally informed or a preset frequency hopping pattern needs to be adopted.

Specifically, the UL SI-RS resources that the terminal or the IAB-MT acquires from the IAB-donor the parent node IAB-DU may be either explicit or implicit. There are several ways to explicitly acquire UL SI-RS resources: the first approach is to obtain Information Elements (IE) from higher layer signaling when RRC connection is established, and to add Information Elements (IE) for notifying UL SI-RS resource location to the higher layer signaling. The second approach is to obtain from the downlink control information. And adding an uplink self-interference reference signal indication field in the downlink control information, wherein the value of the field indicates the time domain position and the frequency domain position of the terminal or the UL SI-RS resource used for self-interference channel estimation by the IAB-MT. Implicit acquisition of UL SI-RS resources can be achieved in several ways: the first method is that the UL SI-RS resource position of the father node IAB-MT and/or the time domain position and the frequency domain position of the DL SI-RS resource of the father node IAB-DU calculate the time domain position and the frequency domain position of the UL SI-RS resource of the IAB-MT according to a preset correlation function. For example, if the starting OFDM symbol sequence number of the UL SI-RS resource of the parent node IAB-MT is n and the SI-RS resource of each IAB node occupies M OFDM symbols, then the starting OFDM symbol sequence of the UL SI-RS resource of the terminal or IAB-MTThe number may be n + M. If the starting PRB number of the UL SI-RS resource of the parent node IAB-MT is L and occupies L PRBs, then the PRB number of the UL SI-RS resource of the terminal or IAB-MT is mod (L + L, N)_PRB) In which N is_PRBThe number of PRBs in the bandwidth. The calculation method of the correlation function is not limited to the above calculation method. The second is determined according to a preset inter-IAB node SI-RS resource allocation pattern. The preset inter-IAB node SI-RS resource allocation pattern should give the time domain position and frequency domain position of UL SI-RS resource of each terminal or IAB-MT on the connection, when the terminal or IAB-MT accesses IAB-donor father node IAB-DU, it needs to obtain a unique identifier from the high layer signaling or downlink control informationIndicating the relative position of the terminal or IAB-MT in the data link from the IAB-donor, e.g.The expression IAB-donor is,represents the IAB-MT of the access IAB-donor, and so on. The time-frequency position of SI-RS resources (UL SI-RS resources and DL SI-RS resources) of each IAB node is specified in the preset inter-IAB node SI-RS resource distribution pattern, and the terminal or the IAB-MT acquires the identifierThen, the time domain position and the frequency domain position of the UL SI-RS resource are directly obtained from the pattern.

The IAB-DU firstly acquires the position of DL SI-RS resource, and then allocates UL SI-RS resource for the terminal or IAB-MT accessing the IAB-DU.

The way the IAB-DU acquires DL SI-RS resources may be explicit or implicit. There may be 2 ways to explicitly acquire DL SI-RS resources: the first is configured by the IAB-donor through higher layer signaling, and the second is notified by the same IAB node IAB-MT. There are two ways to implicitly acquire DL SI-RS resources: the first is to calculate the time-frequency domain position of DL SI-RS according to the time-frequency domain position of UL SI-RS resource of the same IAB node IAB-MT and the resource allocation mode of SI-RS in the IAB node. For example, for the time domain position of the DL SI-RS, if the SI-RS resource allocation manner in the IAB node is that the OFDM symbols of the UL SI-RS and the DL SI-RS are adjacent and the UL SI-RS is in front, the IAB-DU may determine that the OFDM symbol of the DL SI-RS resource is n +1 according to the OFDM symbol sequence number n of the UL SI-RS. If the SI-RS resource allocation within the IAB node is not time division multiplexed, the IAB-DU may determine that the DL SI-RS and the UL SI-RS for the same IAB node IAB-MT are located within the same OFDM symbol. For the frequency domain position of the DL SI-RS, if the SI-RS resource allocation mode in the IAB node is that the UL SI-RS and the DL SI-RS are frequency division multiplexing, the DL SI-RS resource of the IAB-DU is in the bandwidth used by the SI-RS resource of the IAB node and is not used by the UL SI-RS. And if the allocation mode of the SI-RS resources in the IAB node is neither time division multiplexing nor frequency division multiplexing, the time frequency positions of the DL SI-RS resources of the IAB-DU and the UL SI-RS resources of the IAB-MT are the same.

An IAB-DU of an IAB node estimates the interference strength between the IAB-MT of the parent node and a terminal or a sub-node IAB-MT accessing the IAB-DU, allocates UL SI-RS resources for the terminal or the sub-node IAB-MT, if the interference strength exceeds the interference strength threshold, the IAB-DU allocates a time-frequency domain resource different from the UL SI-RS resource of the parent node IAB-MT and the UL SI-RS resource of the IAB-MT of the IAB node for a terminal accessing the IAB-DU or a child node IAB-MT, if the interference strength does not exceed the interference strength threshold, the IAB-DU can allocate resources at the same time-frequency domain position as UL SI-RS resources of the parent node IAB-MT to a terminal accessing the IAB-DU or the child node IAB-MT as the UL SI-RS resources of the terminal or the child node IAB-MT.

After the IAB-DU is accessed by the terminal or the sub-node IAB-MT, the distance and the arrival angle between the terminal or the sub-node IAB-MT and the IAB-DU can be estimated, and then the three-dimensional coordinate (x) of the terminal or the sub-node IAB-MT is calculated_p，y_p，z_p). After the IAB-MT of the same IAB node accesses the IAB-DU or IAB-doror of the father node, the Time Advance (TA) instruction sent by the IAB-DU or IAB-doror of the father node can be used to calculate the Time Advance (TA) with the father nodeThe distance between the IAB-DU and the IAB-doror of the father node is estimated through the pre-coding matrix or the beam direction of the IAB-MT, and the azimuth angle of the IAB-DU or the IAB-doror of the father node is further calculated, and the coordinate (x) of the IAB-DU or the IAB-doror of the father node relative to the IAB-MT is further calculated_c，y_c，z_c). Through the two coordinates, the IAB-DU can calculate the distance between the parent node IAB-MT and the child node IAB-MTAnd further estimates the interference strength between the parent node IAB-MT and the child node IAB-MT,where λ is the carrier wavelength and a is a correction factor.

Since the self-interference cancellation technique is an enabling technique of the full-duplex technique, that is, full-duplex transmission cannot be realized without self-interference cancellation, the performance of self-interference cancellation strongly affects the throughput of the full-duplex system. The quality of self-interference cancellation depends on the accuracy of the self-interference channel estimation, and therefore, the key to guarantee the accuracy of the self-interference channel estimation is the full-duplex technology. As mentioned above, since there may be multiple IAB nodes in an IAB scenario, the reference signal used by each IAB node for self-interference channel estimation may also be interfered with by a more complex component.

According to the prior art, as shown in fig. 1, when an IAB-MT and a parent node IAB-DU or IAB-dor perform full duplex transmission, the parent node IAB-DU or IAB-dor does not send downlink signals on SI-RS resources of the IAB-MT (time-frequency domain resources for performing self-interference channel estimation), and the IAB-MT does not send uplink signals on SI-RS resources of the parent node IAB-DU or IAB-dor, so as to ensure that the IAB-MT and the parent node IAB-DU or IAB-dor can perform self-interference channel estimation without interference. Similarly, this configuration is also applicable if full duplex transmission is performed between the IAB-DU and the child node IAB-MT and DL2/UL2 and DL1/UL1 do not perform 4-link full duplex transmission of the same frequency band. However, when at least one of the sub-node uplink UL2 and the IAB-DU downlink DL2 is in full duplex transmission with the IAB-MT uplink UL1, the IAB-DUs of the sub-nodes IAB-MT and IAB node will experience interference when data transmission is performed on the SI-RS resource of the IAB-MT of the IAB node. Similarly, when the IAB-DU of the IAB node performs full duplex transmission to the DL2 of the sub-node IAB-MT and the IAB-DU (or IAB-donor) of the parent node IAB-MT to the DL1 of the IAB-MT of the IAB node, the parent node IAB-DU is interfered when data transmission is performed on the SI-RS resource of the IAB-DU of the IAB node.

Fig. 7 shows a flowchart of a physical signal transmission method for a terminal function entity of an IAB node according to an exemplary embodiment of the present disclosure. The method shown in fig. 7 is suitable for IAB resource avoidance, i.e. an IAB node cannot transmit non-SI-RS signals on its own SI-RS resources, and cannot transmit any uplink or downlink signals on the SI-RS resources of other IAB nodes that may be interfered by the IAB node.

Referring to fig. 7, in step S701, resources that need to be avoided when receiving a downlink signal and transmitting an uplink signal are identified.

In an exemplary embodiment of the present disclosure, the determined resources that need to be avoided may include an uplink physical signal resource of the parent node terminal functional entity and a downlink physical signal resource of the parent node base station functional entity, or the determined resources that need to be avoided may include an uplink physical signal resource and a downlink physical signal resource of the parent node and a downlink physical signal resource of the base station functional entity of the IAB node.

In one embodiment, the determined resources to be avoided include an uplink physical signal resource of the parent node terminal functional entity and a downlink physical signal resource of the parent node base station functional entity. The method includes the steps that after a terminal or an IAB-MT accesses an IAB-donor a father node IAB-DU, the position of a time-frequency resource which needs to be avoided when a downlink signal is received or an uplink signal is sent is obtained, the resource needs to be avoided when the downlink signal is received or the uplink signal is sent, wherein the resource which needs to be avoided should include a resource (namely DL SI-RS resource) used by the father node IAB-DU for self-interference channel estimation, the difference of the method and the terminal is different from the prior art is that the resource which needs to be avoided should also include a resource (namely UL SI-RS resource) used by the father node IAB-MT for self-interference channel estimation, and the UL SI-RS resource and the DL SI-RS resource of the father node can be. The terminal or the IAB-MT avoids the UL SI-RS resource of the father node when sending the uplink data, can ensure that the father node IAB-MT is not interfered by the uplink signal from the terminal or the IAB-MT when carrying out self-interference channel estimation, ensures the self-interference channel estimation precision of the father node IAB-MT, and further ensures the system throughput.

In another embodiment, the determined resources to be avoided may include an uplink physical signal resource of the parent node terminal functional entity and a downlink physical signal resource of the parent node base station functional entity, and a downlink physical signal resource of the base station functional entity of the IAB node. When the terminal or the IAB-MT accesses the IAB-Donor or the father node IAB-DU, the full duplex capability of the node is reported to the IAB-Donor or the father node IAB-DU, and whether the IAB-DU of the same node with the IAB-MT can carry out full duplex transmission with the uplink/downlink of the IAB-MT or not is indicated. Then, the terminal or the IAB-MT acquires the positions of the time-frequency resources that need to be avoided when receiving the downlink signal and transmitting the uplink signal, and needs to avoid these resources when receiving the downlink signal and transmitting the uplink signal. These resources that should be avoided should contain the resources that the parent node IAB-DU or IAB-Donor uses for self-interference channel estimation (i.e. SI-RS resources). If the accessed base station is a father node IAB-DU, and the father node IAB-DU can carry out full duplex transmission with the uplink or the downlink of the father node IAB-MT, the resources to be avoided also comprise the resources (namely UL SI-RS resources) used by the father node IAB-MT for carrying out self-interference channel estimation, wherein the father node DL SI-RS and the UL SI-RS can be the same resources. When the IAB-DU of the same node has the capability of performing full duplex transmission with the uplink/downlink of the IAB-MT, the resource to be avoided should also include the resource used by the IAB-DU of the same node for performing self-interference channel estimation (i.e. DL SI-RS resource), and the UL SI-RS and DL SI-RS of the node may be the same resource. The IAB-MT avoids UL SI-RS resources of the father node and DL SI-RS resources of the IAB-DU of the same node when sending the uplink signal, can ensure that the IAB-MT of the father node and the IAB-DU of the same node are not interfered by the uplink signal from the IAB-MT when carrying out self-interference channel estimation, and ensure the self-interference channel estimation precision of the IAB-MT of the father node and the IAB-DU of the same node, thereby ensuring the system throughput. The IAB-MT avoids DL SI-RS resources of the IAB-DU of the same node when receiving the downlink signal, namely the father node IAB-DU does not send the downlink signal on the DL SI-RS resources of the IAB-DU of the same node, so that the estimation precision of the self-interference channel of the IAB-DU of the same node can be ensured, and the system throughput is further ensured.

The terminal or the IAB-MT may explicitly acquire the avoidance resource indication information or implicitly acquire the avoidance resource indication information. There are two ways to explicitly obtain the location of the resource to be avoided. The first way is to add an Information Element (IE) of resource avoidance indication in the higher layer signaling sent by the IAB-donor parent node IAB-DU to the terminal or IAB-MT, and the terminal or IAB-MT acquires the avoidance resource indication information from the information element of resource avoidance indication when acquiring the higher layer signaling. The second method is that an avoidance resource indication information field is added in the downlink control information sent by the IAB-donor the father node IAB-DU to the terminal or the IAB-MT, and the terminal or the IAB-MT acquires the avoidance resource indication information from the avoidance resource indication information field of the downlink control information when receiving the downlink control information. In any way, the content of the acquired avoidance resource indication information includes the time domain position and the frequency domain position of the avoidance resource, where the time domain position is a frame, a subframe, a time slot or an OFDM symbol where the avoidance resource is located, and may indicate the starting OFDM symbol position and the number of OFDM symbols either discretely or simultaneously. The frequency domain position is a Physical Resource Block (PRB) number for avoiding resources, and may be indicated discretely or may be indicated by a start PRB number and a PRB number at the same time. There are two ways to implicitly obtain the location of the resource to be avoided. The first is based on a predetermined fixed resource avoidance pattern. The resource avoidance pattern indicates the location of resources that each terminal or IAB-MT needs to avoid when receiving or transmitting data. And the second method is based on SI-RS resources (DL SI-RS resources and/or UL SI-RS resources) used for self-interference channel estimation, and indirectly acquiring according to a preset association mode. And after the terminal or the IAB-MT acquires the SI-RS resource used for self-interference channel estimation, determining the resource needing to be avoided according to a preset association mode. For example, if the SI-RS resources between IAB nodes are time division multiplexed, the terminal or IAB-MT may avoid several OFDM symbols adjacent to the OFDM symbol where its own SI-RS resources are located. If the SI-RS resources among the IAB nodes are frequency division multiplexing, the terminal or the IAB-MT can avoid a plurality of PRBs adjacent to the self SI-RS resources on the OFDM symbol where the self SI-RS resources are located.

In step S702, reception of the downlink physical signal and transmission of the uplink physical signal are performed on resources other than the identified resource that needs to be avoided.

In an exemplary embodiment of the present disclosure, the determined resources that need to be avoided may include at least time domain resources and frequency domain resources, the time domain resources including at least one of: the frequency domain resource comprises at least one of the following frequency domain resources: the PRB sequence number, starting PRB sequence number, and PRB number of the resource.

Furthermore, in the exemplary embodiments of the present disclosure, the downlink physical signal resource of the base station functional entity of the IAB node may also be fed back to the parent node. Specifically, the IAB-MT may send downlink resource avoidance information to the IAB-DU or IAB-dor of the parent node, and indicate resources that need to be avoided when the IAB-dor or IAB-DU of the parent node sends downlink data, where the resources that need to be avoided should include resources that are used for self-interference channel estimation by the IAB-DU of the same IAB node as the IAB-MT, that is, DL-RS resources of the same IAB node, i.e., IAB-DU. After receiving the downlink resource avoiding information, the parent node IAB-DU or IAB-donor will avoid the resource indicated by the downlink resource avoiding indication information when sending downlink data to the IAB-MT.

The content of the DL SI-RS resource indicating the same IAB node IAB-DU in the downlink resource avoiding information is the downlink resource avoiding indication information, and can also comprise downlink resource avoiding position information.

The downlink resource avoidance position information indicates the time-frequency position of the resource needing to be avoided when the IDB-donor the father node IAB-DU sends downlink data to the IAB-MT, wherein the time-domain position can be the frame sequence number, the subframe sequence number, the time slot sequence number or the OFDM symbol sequence number of the DL SI-RS resource, and can also be the repetition period of the DL SI-RS resource and the specific frame sequence number, subframe sequence number, time slot sequence number or the OFDM sequence number in the repetition period. The frequency domain position can be a PRB serial number of the DL SI-RS resource, and can also be a starting PRB serial number and the number of PRBs of the DL SI-RS resource.

The downlink resource avoiding position information can be explicitly notified to the IAB-node or the father node IAB-DU by the IAB-MT, or implicitly acquired by the IAB-node or the father node IAB-DU without being sent. The explicit sending of the downlink avoidance resource location information may be performed in one of the following manners: the first scheme is to transmit as uplink control information on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the second scheme is to transmit via a newly added physical channel or physical signal for transmitting only downlink resource avoidance position information. The IAB-donor father node IAB-DU implicitly acquires the downlink resource avoiding position information, which is not sent by the IAB-MT but can be acquired by one of the following modes: the first mode is to determine the DL SI-RS position of the IAB-DU of the same IAB node with the IAB-MT according to a preset DL SI-RS resource pattern, and the second mode is to determine the DL SI-RS position of the IAB-DU of the same IAB node with the IAB-MT through a correlation mode according to the UL SI-RS resource position of the IAB-MT. If the UL SI-RS resource and the DL SI-RS resource inside each IAB node are time division multiplexed, the IAB-node or the parent node IAB-DU may obtain the DL SI-RS time domain position of the same IAB node IAB-DU according to the UL SI-RS time domain position of the IAB-MT, for example, the DL SI-RS resource is located in the OFDM symbol after the OFDM symbol where the UL SI-RS resource is located. If the UL SI-RS resource and the DL SI-RS resource inside each IAB node are frequency division multiplexed, the IAB-donor the parent node IAB-DU may obtain the PRB sequence number of the DL SI-RS of the same IAB node IAB-DU according to the PRB sequence number of the UL SI-RS of the IAB-MT, for example, the PRB where the DL SI-RS resource is located is a PRB that is not used by the UL SI-RS resource in the IAB-MT scheduling bandwidth. If the UL SI-RS resource and the DL SI-RS resource inside each IAB node are the same frequency at the same time, then the IAB-donor the father node IAB-DU can determine that the UL SI-RS of the IAB-MT and the DL SI-RS of the IAB-DU are the same resource.

The downlink resource avoidance instruction information indicates that the IAB-donor the father node IAB-DU needs to avoid the resource indicated by the downlink resource avoidance position information or does not avoid the resource indicated by the downlink resource avoidance position information when sending downlink data.

The IAB-MT may explicitly send the downlink resource avoidance instruction information, or may implicitly send the downlink resource avoidance information. The explicit sending of the downlink resource avoidance indication information may be implemented in one of the following manners: the first method is to transmit downlink resource avoidance instruction information in uplink control information, and for example, uplink control information with a length of 1 bit may be added to transmit downlink resource avoidance instruction information. The value of the uplink control information determines whether or not the IAB-donor parent node IAB-DU needs to avoid the resource indicated by the downlink resource avoidance position information when transmitting downlink data, and for example, a field value of 1 may indicate that avoidance is needed, and a field value of 0 may indicate that avoidance is not needed. The second is to use a special physical channel or physical signal to transmit the downlink resource avoidance indication information. The third mode is to design two different transmission modes for a certain uplink physical channel or uplink physical signal according to whether the parent node IAB-DU or IAB-donor needs to avoid the resource indicated by the downlink resource avoiding position information, wherein one transmission mode is adopted when avoiding is needed, and the other transmission mode is adopted when avoiding is not needed. When the father node IAB-DU or IAB-donor receives the uplink signal, the two transmission modes are blindly detected, and the downlink resource avoiding indication information can be obtained. For example, the two transmission schemes may use different scrambling sequences, or different interleavers, etc. The method for implicitly sending the downlink resource avoidance instruction information does not need the IAB-MT to send the downlink resource avoidance instruction information, the parent node IAB-DU or IAB-doror can default to the resource position that needs to be avoided when sending the downlink data after obtaining the resource position that needs to be avoided when sending the downlink data, and the way to obtain the resource position that needs to be avoided when sending the downlink data can be explicitly sent by the IAB-MT or can be determined by a preset fixed pattern.

Fig. 8 shows a flowchart of a physical signal transmission method for a base station functional entity of an IAB node according to an exemplary embodiment of the present disclosure.

Referring to fig. 8, in step S801, a downlink physical signal resource of a base station functional entity of a child node is acquired.

In step S802, downlink physical signals are transmitted on resources other than the acquired downlink physical signal resources of the base station functional entity of the child node.

In an exemplary embodiment of the present disclosure, the base station functional entity of the IAB node may determine, as a resource that needs to be avoided when sending downlink data, a downlink physical signal resource of the base station functional entity of the sub node that is fed back by the sub node, so as to send a downlink physical signal on a resource other than the downlink physical signal resource of the base station functional entity of the sub node.

The physical signal transmission method for the IAB node, the resource allocation method of the physical signal between the IAB nodes, the physical signal transmission method for the terminal functional entity of the IAB node, or the physical signal transmission method for the base station functional entity of the IAB node according to the exemplary embodiments of the present disclosure have been described above with reference to fig. 1 to 8. Hereinafter, a physical signal transmission apparatus for an IAB node, a resource allocation apparatus for a physical signal between IAB nodes, a physical signal transmission apparatus for a terminal function entity of an IAB node, or a physical signal transmission apparatus for a base station function entity of an IAB node and units thereof according to exemplary embodiments of the present disclosure will be described with reference to fig. 9 to 12.

Fig. 9 shows a block diagram of a physical signaling apparatus for an IAB node according to an example embodiment of the present disclosure.

Referring to fig. 9, the physical signal transmission apparatus for an IAB node includes a parameter acquisition unit 91 and a signal transmission unit 92.

The parameter acquisition unit 91 is configured to acquire configuration parameters for transmitting the physical signal.

The signal sending unit 92 is configured to send, according to the acquired configuration parameters, an uplink physical signal sent by the terminal functional entity of the IAB node and a downlink physical signal sent by the base station functional entity of the IAB node on the same time domain resource when a terminal functional entity uplink sending link, a terminal functional entity downlink receiving link, a base station functional entity downlink sending link, and a base station functional entity uplink receiving link of the IAB node perform full duplex transmission with the same frequency at the same time.

In an exemplary embodiment of the present disclosure, the physical signal may include at least one of: reference signals for self-interference channel estimation, demodulation reference signals, phase tracking reference signals and sounding reference signals.

In an exemplary embodiment of the present disclosure, the configuration parameters for transmitting the physical signal may include an uplink physical signal parameter and a downlink physical signal parameter.

In an exemplary embodiment of the present disclosure, the uplink physical signal parameter may include at least one of: the method comprises the following steps of carrying out cyclic shift amount information on an uplink physical signal, comb frequency domain resource structure information and comb frequency domain resource structure switching period information on the uplink physical signal, frequency hopping pattern information and frequency hopping switching interval information on the uplink physical signal, and frequency domain and time domain orthogonal superposition code information on the uplink physical signal.

In an exemplary embodiment of the present disclosure, the downlink physical signal parameter may include at least one of: the information of the cyclic shift amount of the downlink physical signal, the information of the comb frequency domain resource structure and the switching period of the comb frequency domain resource structure of the downlink physical signal, the information of the frequency hopping pattern and the frequency hopping switching interval of the downlink physical signal, and the information of the frequency domain and the time domain orthogonal superposition code of the downlink physical signal.

In an exemplary embodiment of the present disclosure, the downlink physical signal parameter may further include a physical root sequence number of an uplink physical signal sent by a terminal function entity of the IAB node.

In an exemplary embodiment of the present disclosure, the signal transmitting unit 92 may be configured to: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring different cyclic shift amounts for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; the uplink physical signal and the downlink physical signal to which different cyclic shift amounts are allocated are transmitted on the same time domain resource.

In an exemplary embodiment of the present disclosure, the signal transmitting unit 92 may be configured to: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a comb-shaped frequency domain resource structure for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; and sending the uplink physical signal and the downlink physical signal configured with different comb frequency domain resource structures on the same time domain resource.

In an exemplary embodiment of the present disclosure, the signal transmitting unit 92 may be configured to: configuring frequency hopping patterns for the uplink physical signals and the downlink physical signals according to the acquired configuration parameters; and transmitting the uplink physical signal and the downlink physical signal configured with different frequency hopping patterns on the same time domain resource.

In an exemplary embodiment of the present disclosure, the signal transmitting unit 92 may be configured to: when the waveforms of the uplink physical signal and the downlink physical signal are the same, configuring a frequency domain orthogonal superposition code and a time domain orthogonal superposition code for the uplink physical signal and the downlink physical signal according to the acquired configuration parameters; and sending the uplink physical signal and the downlink physical signal which are configured with different frequency domain and time domain orthogonal superposition codes on the same time domain resource.

Fig. 10 is a block diagram illustrating a resource allocation apparatus for physical signals between IAB nodes according to an exemplary embodiment of the present disclosure.

Referring to fig. 10, the apparatus for allocating resources for physical signals between IAB nodes includes a first allocation unit 101, a second allocation unit 102, and a third allocation unit 103.

The first allocating unit 101 is configured to group all IAB nodes, and set the resources of the physical signals of the IAB nodes in each group to be all time division multiplexing or all frequency division multiplexing. Here, the physical signal includes at least an uplink physical signal.

The second allocating unit 102 is configured to set the resources of the physical signals of the inter-group IAB nodes to all groups that are all time division multiplexed, for the resources of the physical signals of the intra-group IAB nodes to frequency division multiplexed.

The third allocating unit 103 is configured to set the resources of the physical signals of the inter-group IAB nodes to time division multiplexing for all groups for which the resources of the physical signals of the intra-group IAB nodes are set to all frequency division multiplexing.

In an exemplary embodiment of the present disclosure, the first allocation unit 101 may be configured to: when the resources of the physical signals of the IAB nodes in one group are set to be all time division multiplexing, allocating a first number of time domain resources different from other IAB nodes to each IAB node; when the resource of the physical signal of the IAB node in one group is set to be full frequency division multiplexing, on the time domain resource where the resource of the physical signal is located, the bandwidth is divided into a plurality of frequency domain resources in which the segments are not overlapped with each other, and each IAB node is allocated with one segment of the frequency domain resources in the second segment.

In an exemplary embodiment of the present disclosure, the time domain resource of the uplink physical signal may be in the form of an absolute frame number, an absolute subframe number, an absolute slot number, and an absolute OFDM symbol number of the uplink physical signal resource, or in the form of a repetition period of the uplink physical signal resource and a relative frame number, a relative subframe number, a relative slot number, and a relative OFDM symbol number within the repetition period.

In an exemplary embodiment of the present disclosure, the frequency domain resource of the uplink physical signal may be in the form of at least one of: all physical resource block serial numbers of uplink physical signal resources of each frequency hopping or equivalent parameters of all physical resource block serial numbers can be calculated uniquely; all physical resource block numbers of the uplink physical signal resource of the initial frequency hopping or equivalent parameters capable of uniquely calculating all physical resource block numbers, where the initial frequency hopping refers to a frequency hopping starting point within one frequency hopping period.

Fig. 11 shows a block diagram of a physical signal transmission apparatus of a terminal function entity for an IAB node according to an exemplary embodiment of the present disclosure.

Referring to fig. 11, the physical signal transmission apparatus for the terminal function entity of the IAB node includes a resource determination unit 111 and a first transmission unit 112.

The resource determination unit 111 is configured to acquire an uplink physical signal resource and a downlink physical signal resource of a parent node.

In an exemplary embodiment of the present disclosure, the determined resources that need to be avoided may include an uplink physical signal resource of the parent node terminal functional entity and a downlink physical signal resource of the parent node base station functional entity, or the determined resources that need to be avoided may include an uplink physical signal resource and a downlink physical signal resource of the parent node and a downlink physical signal resource of the base station functional entity of the IAB node.

The first transmission unit 112 is configured to perform reception of the downlink physical signal and transmission of the uplink physical signal on a resource other than the acquired uplink physical signal resource and downlink physical signal resource of the parent node.

In an exemplary embodiment of the present disclosure, the determined resources that need to be avoided may include at least time domain resources and frequency domain resources, and the time domain resources may include at least one of: the frame number, the subframe number, the slot number or the OFDM symbol number, the starting OFDM symbol position and the number of OFDM symbols, and the frequency domain resource may include at least one of: the physical resource block number of the resource, the starting physical resource block number and the physical resource block number.

In an exemplary embodiment of the present disclosure, the physical signal transmission apparatus for a terminal function entity of an IAB node may further include: a resource feedback unit (not shown) is configured to feed back downlink physical signal resources of the base station functional entity of the IAB node to the parent node.

Fig. 12 shows a block diagram of a physical signal transmission apparatus of a base station functional entity for an IAB node according to an exemplary embodiment of the present disclosure.

Referring to fig. 12, the physical signal transmission apparatus for the base station functional entity of the IAB node includes a resource acquisition unit 121 and a second transmission unit 122.

The resource obtaining unit 121 is configured to obtain a downlink physical signal resource of a base station functional entity of a child node.

The second transmission unit 122 is configured to transmit the downlink physical signal on a resource other than the acquired downlink physical signal resource of the base station functional entity of the child node.

Further, according to an exemplary embodiment of the present disclosure, there is also provided a computer readable storage medium having stored thereon a computer program that, when executed, implements a physical signal transmission method for an IAB node, a resource allocation method for a physical signal between IAB nodes, a physical signal transmission method for a terminal function entity of an IAB node, or a physical signal transmission method for a base station function entity of an IAB node according to an exemplary embodiment of the present disclosure.

In an exemplary embodiment of the disclosure, the computer readable storage medium may carry one or more programs which, when executed, implement the steps of: acquiring configuration parameters for transmitting physical signals; when a terminal function entity uplink sending link, a terminal function entity downlink receiving link, a base station function entity downlink sending link and a base station function entity uplink receiving link of the IAB node carry out full duplex transmission with the same frequency at the same time, sending an uplink physical signal sent by the terminal function entity of the IAB node and a downlink physical signal sent by the base station function entity of the IAB node on the same time domain resource according to the obtained configuration parameters.

In an exemplary embodiment of the disclosure, the computer readable storage medium may carry one or more programs which, when executed, implement the steps of: when the resources of the physical signals of all the IAB nodes are all time division multiplexed, a first number of time domain resources different from other IAB nodes are allocated to each IAB node, when the resources of the physical signals of all the IAB nodes are all frequency division multiplexed, the bandwidth is divided into a plurality of frequency domain resources which are not overlapped with each other on the time domain resources where the resources of the physical signals are located, and one section of frequency domain resources in a second number of sections are allocated to each IAB node.

In an exemplary embodiment of the disclosure, the computer readable storage medium may carry one or more programs which, when executed, implement the steps of: and acquiring an uplink physical signal resource and a downlink physical signal resource of the father node, and receiving downlink physical signals and transmitting the uplink physical signals on resources except the acquired uplink physical signal resource and downlink physical signal resource of the father node.

In an exemplary embodiment of the disclosure, the computer readable storage medium may carry one or more programs which, when executed, implement the steps of: and acquiring the downlink physical signal resource of the base station functional entity of the child node, and sending the downlink physical signal on the resource except the acquired downlink physical signal resource of the base station functional entity of the child node.

A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer program embodied on the computer readable storage medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing. The computer readable storage medium may be embodied in any device; it may also be present separately and not assembled into the device.

The physical signal transmission apparatus for an IAB node, the resource allocation apparatus for physical signals between IAB nodes, the physical signal transmission apparatus for a terminal function entity of an IAB node, or the physical signal transmission apparatus for a base station function entity of an IAB node according to the exemplary embodiments of the present disclosure have been described above with reference to fig. 9 to 12. Next, a computing device according to an exemplary embodiment of the present disclosure is described with reference to fig. 13.

Fig. 13 shows a schematic diagram of a computing device according to an example embodiment of the present disclosure.

Referring to fig. 13, the computing apparatus 13 according to an exemplary embodiment of the present disclosure includes a memory 131 and a processor 132, the memory 131 having stored thereon a computer program that, when executed by the processor 132, implements a physical signal transmission method for an IAB node, a resource allocation method for a physical signal between IAB nodes, a physical signal transmission method for a terminal functional entity of an IAB node, or a physical signal transmission method for a base station functional entity of an IAB node according to an exemplary embodiment of the present disclosure.

In an exemplary embodiment of the disclosure, the computer program, when executed by the processor 132, may implement the steps of: acquiring configuration parameters for transmitting physical signals; when a terminal function entity uplink sending link, a terminal function entity downlink receiving link, a base station function entity downlink sending link and a base station function entity uplink receiving link of the IAB node carry out full duplex transmission with the same frequency at the same time, sending an uplink physical signal sent by the terminal function entity of the IAB node and a downlink physical signal sent by the base station function entity of the IAB node on the same time domain resource according to the obtained configuration parameters.

In an exemplary embodiment of the disclosure, the computer program, when executed by the processor 132, may implement the steps of: when the resources of the physical signals of all the IAB nodes are all time division multiplexed, a first number of time domain resources different from other IAB nodes are allocated to each IAB node, when the resources of the physical signals of all the IAB nodes are all frequency division multiplexed, the bandwidth is divided into a plurality of frequency domain resources which are not overlapped with each other on the time domain resources where the resources of the physical signals are located, and one section of frequency domain resources in a second number of sections are allocated to each IAB node.

In an exemplary embodiment of the disclosure, the computer program, when executed by the processor 132, may implement the steps of: and acquiring an uplink physical signal resource and a downlink physical signal resource of the father node, and receiving downlink physical signals and transmitting the uplink physical signals on resources except the acquired uplink physical signal resource and downlink physical signal resource of the father node.

In an exemplary embodiment of the disclosure, the computer program, when executed by the processor 132, may implement the steps of: and acquiring the downlink physical signal resource of the base station functional entity of the child node, and sending the downlink physical signal on the resource except the acquired downlink physical signal resource of the base station functional entity of the child node.

The computing device illustrated in fig. 13 is only one example and should not impose any limitations on the functionality or scope of use of embodiments of the disclosure.

The physical signal transmission method and apparatus for the IAB node, the resource allocation method and apparatus for the physical signal between the IAB nodes, the physical signal transmission method and apparatus for the terminal function entity of the IAB node, or the physical signal transmission method and apparatus for the base station function entity of the IAB node according to the exemplary embodiments of the present disclosure have been described above with reference to fig. 1 to 13. However, it should be understood that: the physical signal transmission means for the IAB nodes, the resource allocation means for the physical signals between the IAB nodes, the physical signal transmission means for the terminal functional entities of the IAB nodes, or the physical signal transmission means for the base station functional entities of the IAB nodes and their units shown in fig. 9 to 12 may be respectively configured as software, hardware, firmware, or any combination thereof to perform specific functions, the computing means shown in fig. 13 is not limited to including the above-shown components, but some components may be added or deleted as needed, and the above components may also be combined.

According to the physical signal transmission method and device for the IAB node, through orthogonal resource division, when a terminal function entity uplink transmission link, a terminal function entity downlink receiving link, a base station function entity downlink transmission link and a base station function entity uplink receiving link of the IAB node carry out simultaneous co-frequency full duplex transmission, an uplink physical signal sent by the terminal function entity of the IAB node and a downlink physical signal sent by the base station function entity of the IAB node are sent on the same time domain resource according to the acquired configuration parameters, so that the time domain resource is saved, and the throughput of an IAB system is improved.

According to the method and the device for allocating the resources of the physical signals among the IAB nodes, all the IAB nodes are grouped, and the resources of the physical signals of the IAB nodes in each group are set to be all time division multiplexing or all frequency division multiplexing; setting the resource of the physical signal of the IAB nodes in the groups as all groups of all time division multiplexing, and setting the resource of the physical signal of the IAB nodes in the groups as frequency division multiplexing; the resources of the physical signals of the IAB nodes in the groups are set to all groups of all frequency division multiplexing, and the resources of the physical signals of the IAB nodes in the groups are set to time division multiplexing, so that the orthogonal resources are distributed to all the IAB nodes, and the signal interference is avoided.

According to the physical signal transmission method and device for the terminal function entity of the IAB node in the exemplary embodiment of the present disclosure, by acquiring the uplink physical signal resource and the downlink physical signal resource of the parent node, the downlink physical signal is received and the uplink physical signal is transmitted on the resource other than the acquired uplink physical signal resource and the downlink physical signal resource of the parent node, so as to avoid the resource, thereby achieving self-interference cancellation.

According to the physical signal transmission method and device for the base station functional entity of the IAB node in the exemplary embodiments of the present disclosure, the downlink physical signal resource of the base station functional entity of the sub-node is acquired, and the downlink physical signal is sent on the resource other than the acquired downlink physical signal resource of the base station functional entity of the sub-node, so as to avoid the resource, thereby achieving self-interference cancellation.

While the present disclosure has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the following claims.