Resource allocation and resource selection method, device and storage medium

文档序号：516936 发布日期：2021-05-28 浏览：7次中文

阅读说明：本技术 资源分配和资源选择方法、设备和存储介质 (Resource allocation and resource selection method, device and storage medium ) 是由刘锟戴博方惠英于 2021-01-15 设计创作，主要内容包括：本申请提出一种资源分配和资源选择方法、设备和存储介质。该方法包括：配置第一类型通信节点所对应PRACH Preamble占用的PRACH时频资源；将PRACH时频资源发送至所述第一类型通信节点。(The application provides a resource allocation and resource selection method, equipment and a storage medium. The method comprises the following steps: configuring PRACH time frequency resources occupied by PRACH Preamble corresponding to the first type communication node; and sending the PRACH time frequency resource to the first type communication node.)

1. A method for resource allocation, comprising:

configuring PRACH time-frequency resources occupied by PRACH random access Preamble corresponding to the first type communication node;

and sending the PRACH time frequency resource to the first type communication node.

2. The method of claim 1, wherein the position of the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node includes at least one of:

PRACH time frequency resources occupied by PRACH Preamble corresponding to the second type communication node; a PRACH time-frequency resource dedicated for a first type of communication node.

3. The method according to claim 2, characterized in that, in case that the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type of communication node is located at a position that includes the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type of communication node, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type of communication node is configured from the PRACH Preamble corresponding to the second type of communication node that is used for not competing for the random access CBRA.

4. The method of claim 1, wherein the configuring the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first type communication node comprises:

indicating a starting index of the PRACH Preamble corresponding to the first type communication node through the first information;

or the starting index of the PRACH Preamble corresponding to the first type communication node is the ending index of the PRACH Preamble configured by the second type communication node plus K; k is an integer of 1 or more.

5. The method according to claim 4, wherein the ending index of the PRACH Preamble configured by the second type communication node comprises one of:

under the condition of supporting the first type PRACH, the method is the ending index of the first type PRACH Preamble;

and under the condition of supporting the second type PRACH, the ending index of the second type PRACH Preamble is obtained.

6. The method as claimed in claim 5, wherein the first and second types of Msg3 and Msg3 are supported and comprise one of:

under the condition of supporting the first type of PRACH, the ending index of the first type of PRACH Preamble is the ending index of the Preamble corresponding to the first type of Msg 3;

and under the condition of supporting the second type PRACH, the ending index of the second type PRACH Preamble is the ending index of the Preamble corresponding to the first type Msg 3.

7. The method of claim 1, wherein when the first type of PRACH is configured by the first type of communication node, the configuring a time-frequency resource occupied by a PRACH Preamble corresponding to the first type of communication node further comprises:

and indicating the PRACH Preamble number corresponding to the first type communication node through the second information.

8. The method of claim 1, wherein when the first type of PRACH and the second type of PRACH are configured by the first type of communication node, the configuring a time-frequency resource occupied by a PRACH Preamble corresponding to the first type of communication node further comprises:

indicating the number of the first type PRACH preambles corresponding to the first type communication nodes through the second information;

9. The method according to claim 7, wherein the number of PRACH preambles corresponding to the second type of Msg3 is indicated by the fourth information in case that the first type of communication node supports the first type of Msg 3.

10. The method according to claim 8, wherein if the first type communication node supports the first type Msg3, the number of PRACH preambles corresponding to the second type Msg3 of the first type PRACH is indicated by the fourth information; and indicating the PRACH Preamble number corresponding to the second type Msg3 of the second type PRACH through the fifth information.

11. The method according to claim 1, wherein, in a case that the first type communication node includes a first type terminal and a second type terminal, the configuring the time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node includes:

indicating the number of first type PRACH preambles corresponding to the first type terminal through sixth information;

and indicating the number of the first type PRACH preambles corresponding to the second type terminal through seventh information.

12. The method according to claim 11, wherein, in case that the first type communication node supports the first type Msg3, eighth information is used to indicate the number of PRACH preambles corresponding to the second type Msg3 of the first type terminal; and indicating the PRACH Preamble quantity corresponding to the second type Msg3 of the second type terminal by adopting ninth information.

13. The method according to claim 1, wherein the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first type communication node are used by the first type communication node when an initial bandwidth BWP configured for the first type communication node is greater than an operating bandwidth of the first type communication node.

14. The method according to claim 1, comprising, in case the initial BWP configured for the first-type communication node is less than or equal to the operating bandwidth of the first-type communication node, one of:

under the condition that the first type communication node supports or enables a Coverage Recovery (CR) function, PRACH time-frequency resources occupied by PRACH Preamble corresponding to the first type communication node are used by the first type communication node;

and under the condition that the first type communication node does not support or enable the CR function, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type communication node is used by the first type communication node.

15. The method according to claim 13 or 14, wherein the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first type of communication node include one of:

a PRACH time frequency resource dedicated to the first type of communication node;

a PRACH time frequency resource shared by a third type communication node and the first type communication node; wherein the third type communication node is a communication node that supports or enables a coverage enhancement CE function; and the shared PRACH time frequency resource is used for the first type communication node and/or the third type communication node to send PRACH Preamble.

16. The method according to claim 15, wherein, when the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first-type communication node include a PRACH time-frequency resource shared by a third-type communication node and the first-type communication node, indication information of the communication node is carried by an Msg3 message, and the indication information of the communication node indicates that the communication node is the first-type communication node or the third-type communication node.

17. The method according to claim 15, wherein, when the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first-type communication node include a PRACH time-frequency resource shared by a third-type communication node and the first-type communication node, the size of the frequency domain resource occupied by the Msg3 message is smaller than or equal to a working bandwidth of the first-type communication node.

18. The method according to claim 1, characterized in that the usage of the PRACH Preamble in the PRACH time frequency resource corresponding to the second type communication node by the first type communication node is indicated through signaling;

under the condition that the signaling indicates that the first type communication node uses the PRACH Preamble in the PRACH time frequency resource corresponding to the second type communication node, the method comprises at least one of the following steps:

under the condition that the first type communication node supports or enables CR, PRACH time-frequency resources occupied by PRACH Preamble corresponding to the first type communication node are used by the first type communication node;

under the condition that a first type communication node does not support or enable CR, PRACH time-frequency resources occupied by PRACH Preamble corresponding to a second type communication node are used by the first type communication node;

and under the condition that the signaling indicates that the first type communication node does not use the PRACH Preamble in the PRACH time frequency resource corresponding to the second type communication node, the PRACH time frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is used by the first type communication node.

19. A method for resource selection, comprising:

receiving PRACH time frequency resources sent by a fourth communication node;

and selecting the PRACH time frequency resource occupied by the PRACH Preamble from the PRACH time frequency resources.

20. The method according to claim 19, wherein the location of the PRACH time-frequency resource occupied by the PRACH Preamble selected by the first type of communication node comprises at least one of:

PRACH time frequency resources occupied by PRACH Preamble corresponding to the second type communication node; a PRACH time-frequency resource dedicated for a first type of communication node.

21. The method according to claim 19, wherein, when the PRACH time-frequency resource occupied by the PRACH Preamble selected by the first type of communication node is located at a position that includes the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type of communication node, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type of communication node is configured from the PRACH Preamble corresponding to the second type of communication node that is used for other than CBRA.

22. The method according to claim 19, wherein the PRACH time-frequency resources occupied by the PRACH Preamble selected by the first type of communication node are PRACH time-frequency resources dedicated to the first type of communication node, when the initial BWP configured for the first type of communication node is greater than the operating bandwidth of the first type of communication node.

23. The method according to claim 19, wherein in case the initial BWP configured for the first-type communication node is less than or equal to the operating bandwidth of the first-type communication node, comprising one of:

under the condition that the first type communication node supports or enables a CR function, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is a PRACH time frequency resource special for the first type communication node;

and under the condition that the first type communication node does not support or enable the CR function, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is the PRACH time frequency resource occupied by the PRACH Preamble corresponding to the second type communication node.

24. The method according to claim 19, characterized by indicating the usage of the PRACH Preamble in the PRACH time frequency resource by the first type of communication node to the second type of communication node through signaling;

under the condition that the first type communication node supports or enables CR, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is a PRACH time frequency resource special for the first type communication node;

under the condition that a first type communication node does not support or enable CR, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is the PRACH time frequency resource occupied by the PRACH Preamble corresponding to a second type communication node;

and under the condition that the signaling indicates that the first type communication node does not use the PRACH Preamble in the PRACH time frequency resource corresponding to the second type communication node, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is the PRACH time frequency resource special for the first type communication node.

25. A communication device, comprising: a communication module, a memory, and one or more processors;

the communication module is configured to perform communication interaction among the first type communication node, the second type communication node and other communication nodes;

the memory configured to store one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-18 or 19-24.

26. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method according to any one of claims 1-18 or 19-24.

Technical Field

The present application relates to communications, and in particular, to a resource allocation and resource selection method, apparatus, and storage medium.

Background

Compared with the previous communication system, the New Radio (NR) system has higher configuration flexibility and wider application bandwidth. Therefore, terminals with higher capability requirements are required to support NR. However, not all scenarios need to support such high performance terminals, such as Wearable devices (Wearable), Video Surveillance (Video Surveillance), and Industrial Wireless Sensors (Industrial Wireless Sensors). For these scenarios, NR terminals with simplified functionality may suffice. Such Reduced Capability UEs (RedCap UEs) support smaller bandwidths and smaller number of antennas.

Due to the reduction of the bandwidth and the number of antennas of the red beacon UE, the transmission performance of the UpLink Channel (UpLink Channel) and the reception performance of the DownLink Channel (DownLink Channel) are worse than those of the normal NR UE. Therefore, some enhancements to the red map UE in UL and DL are needed to achieve the same transmission performance as NR UE.

During the Initial Access Procedure (Initial Random Access Procedure), it is unclear from the base station whether the UE is a red beacon UE. Therefore, the Msg1(PRACH Preambles) sent by the UE needs to implicitly notify the base station whether the current UE is a RedCap, and the base station may select whether to perform enhancement processing on the UL channel and the DL channel subsequently according to the type of the UE after receiving the PRACH Preamble. Therefore, how to allocate the time-frequency resources of the red map UE is an urgent problem to be solved.

Disclosure of Invention

In view of this, embodiments of the present application provide a method, a device, and a storage medium for resource allocation and resource selection, which implement allocation of time-frequency resources occupied by first-type communication nodes.

An embodiment of the present application provides a resource allocation method, including:

configuring PRACH time frequency resources occupied by PRACH Preamble corresponding to the first type communication node;

and sending the PRACH time frequency resource to the first type communication node.

An embodiment of the present application provides a resource allocation apparatus, including:

the configuration module is configured to configure PRACH time-frequency resources occupied by PRACH random access Preamble corresponding to the first type of communication node;

a transmitter configured to transmit the PRACH time-frequency resource to the first type communication node.

The embodiment of the application provides a resource selection method, which comprises the following steps:

receiving PRACH time frequency resources sent by a fourth communication node;

and selecting the PRACH time frequency resource occupied by the PRACH Preamble from the PRACH time frequency resources.

An embodiment of the present application provides a resource selection apparatus, including:

the receiver is configured to receive a PRACH time frequency resource sent by a fourth communication node;

and the selector is configured to select the PRACH time frequency resource occupied by the PRACH Preamble from the PRACH time frequency resources.

An embodiment of the present application provides a communication device, including: a communication module, a memory, and one or more processors;

the communication module is configured to perform communication interaction between at least two communication nodes;

the memory configured to store one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the method of any of the embodiments described above.

The embodiment of the present application provides a storage medium, wherein the storage medium stores a computer program, and the computer program realizes the method of any one of the above embodiments when being executed by a processor.

Drawings

Fig. 1 is a flow chart of a random access procedure provided in the prior art;

FIG. 2 is a schematic diagram of a rollback procedure for a 2-step RA type CBRA provided in the prior art;

FIG. 3 is a diagram of a mapping relationship between SSBs and preambles provided in the prior art;

fig. 4 is a flowchart of a resource allocation method according to an embodiment of the present application;

FIG. 5 is a flowchart of a resource selection method provided in an embodiment of the present application;

fig. 6 is a schematic resource allocation diagram provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of another resource allocation provided in the embodiments of the present application;

FIG. 8 is a schematic diagram of another resource allocation provided in the embodiments of the present application;

fig. 9 is a block diagram illustrating a resource allocation apparatus according to an embodiment of the present application;

fig. 10 is a block diagram illustrating a resource selection apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Hereinafter, embodiments of the present application will be described with reference to the drawings. The present application is described below with reference to the accompanying drawings of embodiments, which are provided for illustration only and are not intended to limit the scope of the present application.

In NR systems, two types of random access procedures are supported: a 4-step RA type to transmit MSG1 and a 2-step RA type to transmit MSGA. Fig. 1 is a flow chart of a random access procedure provided in the prior art. As shown in fig. 1, both types of RA procedures support Contention Based Random Access (CBRA) and non-Contention Random Access (CFRA).

The network does not configure both 4-step and 2-step RA type CFRA resources for BandWidth parts (BWP). A CFRA of the 2-step RA type only supports handover.

The 4-step RA type MSG1 consists of a Random Access Preamble (Preamble) of a Physical Random Access CHannel (PRACH). After MSG1 transmission, the UE listens for network responses within the configuration window. For CFRA, a dedicated Preamble for MSG1 transmission is allocated by the network, and upon receiving a random access response from the network, the UE ends the random access procedure, as shown in (c) of fig. 1. For CBRA, upon receiving a random access response, the UE transmits MSG3 using the UL granted in the response and monitors the contention result, as shown in fig. 1 (a). If the contention result is unsuccessful after the MSG3 transmission or retransmission, the UE returns an MSG1 transmission.

The 2-step RA type MSGA includes a Preamble on PRACH and a payload on PUSCH. After MSGA transmission, the UE listens for network responses within the configuration window. For CFRA, dedicated Preamble and PUSCH resources are configured for MSGA transmission, and upon receiving a network response, the UE ends the random access procedure, as shown in (d) of fig. 1. For CBRA, if the contention result is successful after receiving the network response, the UE ends the random access procedure, as shown in (b) of fig. 1; fig. 2 is a schematic diagram of a fallback procedure of a 2-step RA type CBRA provided in the prior art, and as shown in fig. 2, if a fallback indication is received in an MSGB, a UE performs MSG3 transmission using an authorized UL in the fallback indication and monitors a contention result. If the contention result is unsuccessful after MSG3 transmission or retransmission, the UE returns an MSGA transmission.

If the random access procedure with the 2-step RA type is not completed after a number of MSGA transmissions, the UE configuration may be switched to a CBRA with the 4-step RA type.

The mapping relationship between the SSB and the PRACH time-frequency resource (occupancy) is as follows:

and (3) SSB: i.e., SS/PBCH block, in which downlink synchronization signals, including Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSs), and PBCH (physical broadcast channel), in which MIB information is carried, are carried. In NR, since multiple Beam transmissions are supported, SSBs also support transmissions in multiple Beam directions, which is a simple understanding that multiple SSBs are supported to transmit in a time division manner.

The PRACH Occasion refers to a corresponding time-frequency resource when the PRACH Preamble is sent. Multiple PRACH acquisitions may be included in the frequency domain at the same time. Meanwhile, time domain periodic transmission is supported.

Because there is SSB in NR, PRACH Occasion and SSB form a corresponding relationship in the random access process, that is, one PRACH Occasion may correspond to 1 SSB, and may also correspond to multiple SSBs, which are all configured by the base station. The value of the high-level parameter indication N indicates that N SSBs correspond to one PRACH occase; for contention random access, there are high-level parameter indications N and R, which respectively indicate that there are N SSBs corresponding to one PRACH occasion and each SSB corresponds to R preambles.

Fig. 3 is a mapping relationship diagram between SSBs and preambles provided in the prior art. As shown in fig. 3, taking N ═ 2 and R ═ 24 as an example, N ═ 2 indicates that 2 SSBs correspond to one PRACH occasion, R ═ 24 indicates that 24 competing Preambles correspond to one SSB, totalNumberOfRA-Preambles indicate how many Preambles are in common for corresponding to the SSB, and one PRACH occasion corresponds to all 64 Preambles.

Under the indication of SSB number configuration, PRACH time frequency resource configuration, and parameters N and R in the SSB period, the SSB and PRACH occase can be mapped specifically according to the sequence of frequency domain first and time domain second.

In an embodiment, fig. 4 is a flowchart of a resource allocation method provided in an embodiment of the present application. This embodiment may be performed by a fourth communication node. The fourth communication node may be a network side (e.g., a base station). As shown in fig. 4, the present embodiment includes: S110-S120.

S110, configuring PRACH time frequency resources occupied by PRACH Preamble corresponding to the first type communication node.

And S120, sending the PRACH time frequency resource to the first type communication node.

In an embodiment, the first type of communication node is referred to as a RedCap UE and the second type of communication node is referred to as an NR UE. In the embodiment, the fourth communication node configures the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first type communication node, and sends the PRACH time-frequency resources to the first type communication node, so that the first type communication node performs PRACH Preamble transmission on the PRACH time-frequency resources corresponding thereto. In the embodiment, the first type communication node uploads the PRACH Preamble to the fourth communication node by using its corresponding PRACH time-frequency resource, and after the fourth communication node receives the PRACH Preamble, whether to perform enhancement processing on subsequent UL and DL channels may be selected according to the type of the communication node. And under the condition that the type of the communication node is the first type communication node, performing enhancement processing on UL and DL channels so as to achieve the same transmission performance as that of the second type communication node. In an embodiment, the location of the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node includes at least one of:

PRACH time frequency resources occupied by PRACH Preamble corresponding to the second type communication node; a PRACH time-frequency resource dedicated for a first type of communication node. In the embodiment, when the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first type communication node are located, and include the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the second type communication node, it means that the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first type communication node and the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the second type communication node share the same PRACH time-frequency resources. In the embodiment, when the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is located includes the PRACH time-frequency resource dedicated to the first type communication node, it means that the first type communication node and the second type communication node use the respective independent PRACH time-frequency resources to carry the transmission of the PRACH Preamble.

In an embodiment, when the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is located at a position including the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type communication node, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is configured from the PRACH Preamble corresponding to the second type communication node, which is not the CBRA.

In an embodiment, configuring PRACH time-frequency resources occupied by PRACH Preamble corresponding to the first type communication node includes:

indicating a starting index of the PRACH Preamble corresponding to the first type communication node through the first information;

In an embodiment, the ending index of the PRACH Preamble configured by the second type communication node includes one of:

under the condition of supporting the first type PRACH, the method is the ending index of the first type PRACH Preamble;

and under the condition of supporting the second type PRACH, the ending index of the second type PRACH Preamble is obtained.

In an embodiment, the first type of PRACH refers to a 4-step PRACH; the second type of PRACH refers to a 2-step PRACH; the first type PRACH Preamble refers to 4-step PRACH Preamble, and the second type PRACH Preamble refers to 2-step PRACH Preamble.

In an embodiment, in the case of supporting the first type Msg3 and the second type Msg3, one of:

under the condition of supporting the first type of PRACH, the ending index of the first type of PRACH Preamble is the ending index of the Preamble corresponding to the first type of Msg 3;

and under the condition of supporting the second type PRACH, the ending index of the second type PRACH Preamble is the ending index of the Preamble corresponding to the first type Msg 3. In an embodiment, the first type Msg3 refers to GroupB; the second type Msg3 refers to GroupA.

In an embodiment, configuring, when the first type communication node configures a first type PRACH, a time-frequency resource occupied by a PRACH Preamble corresponding to the first type communication node further includes:

and indicating the PRACH Preamble number corresponding to the first type communication node through the second information.

In an embodiment, configuring, when the first type communication node configures a first type PRACH and a second type PRACH, a time-frequency resource occupied by a PRACH Preamble corresponding to the first type communication node, further includes:

indicating the number of the first type PRACH preambles corresponding to the first type communication nodes through the second information;

indicating the number of second type PRACH preambles corresponding to the first type communication nodes through the third information; wherein, the starting index of the second type PRACH Preamble is the ending index of the first type PRACH Preamble configured by the second information plus one. In the embodiment, the first type PRACH Preamble number refers to a number of 4-step PRACH preambles; the second type PRACH Preamble number refers to the number of 2-step PRACH preambles.

In an embodiment, in a case that the first type communication node supports the first type Msg3, the fourth information indicates the number of PRACH preambles corresponding to the second type Msg 3.

In an embodiment, under the condition that the first type communication node supports the first type Msg3, indicating the number of PRACH preambles corresponding to the second type Msg3 of the first type PRACH through the fourth information; and indicating the PRACH Preamble number corresponding to the second type Msg3 of the second type PRACH through the fifth information.

In an embodiment, configuring a time-frequency resource occupied by a PRACH Preamble corresponding to a first type communication node when the first type communication node includes a first type terminal and a second type terminal includes:

indicating the number of first type PRACH preambles corresponding to the first type terminal through sixth information;

and indicating the number of the first type PRACH Preamble corresponding to the second type terminal through the seventh information. In an embodiment, the first type terminal is characterized by BW Reduction with Antenna Size Reduction, wherein the first type terminal only needs to configure the bandwidth of the Msg; the second type of terminal is characterized by a BW Reduction with Antenna Size Reduction, wherein the second type of terminal is designed to enhance the bandwidth configuration of Msg3 and for Msg transmission.

In an embodiment, under the condition that the first-type communication node supports the first-type Msg3, indicating the number of PRACH preambles corresponding to the second-type Msg3 of the first-type terminal by using eighth information; and indicating the PRACH Preamble quantity corresponding to the second type Msg3 of the second type terminal by adopting ninth information.

In an embodiment, when the initial BWP configured for the first type communication node is greater than the working bandwidth of the first type communication node, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is used by the first type communication node. In an embodiment, the initial BWP may be an initial upstream BWP or an initial downstream BWP. In the initial random access process, upstream messages (including Msg1, Msg3) are sent on the initial upstream BWP; during initial random access, downstream messages (including Msg2, Msg4) are sent on an initial downstream BWP. In an embodiment, the operating bandwidth of the first type communication node may also be referred to as a maximum bandwidth supported by the first type communication node, a configured bandwidth of the first type communication node, a default bandwidth of the first type communication node, or a predetermined bandwidth of the first type communication node.

In an embodiment, in case the initial BWP configured for the first-type communication node is less than or equal to the operating bandwidth of the first-type communication node, it comprises one of:

under the condition that the first type communication node is a first type communication node supporting or enabling a Coverage Recovery (CR) function, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is a PRACH time-frequency resource special for the first type communication node;

and under the condition that the first type communication node does not support or enable the CR function, the PRACH time frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is the PRACH time frequency resource occupied by the PRACH Preamble corresponding to the second type communication node. In an embodiment, a first type of communication node that supports or enables a CR function, which may also be referred to as a Msg3 message, supports a coverage recovery CR function; the Msg3 message supports a first type of communication node that repeats the transmission function; a first type of communication node having antenna size limitation (antenna size limitation) capability; a first type of communication node having device size limitation (device size limitation) capability; a coverage-limited first type of communication node; and the first type communication node with a downlink (Reference Signal Received Power, RSRP) measurement value less than or equal to a preset threshold value. The configuration mode of the preset threshold comprises the following steps: base station configuration; and (4) pre-configuration.

In an embodiment, the PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first type of communication node include one of:

a PRACH time frequency resource dedicated to the first type of communication node;

PRACH time frequency resources shared by the third type communication node and the first type communication node; the third type communication node is a communication node which supports or enables a Coverage Enhancement (CE) function; and the shared PRACH time frequency resource is used for the first type communication node and/or the third type communication node to send the PRACH Preamble.

In an embodiment, under the condition that PRACH time-frequency resources occupied by a PRACH Preamble corresponding to a first-type communication node include PRACH time-frequency resources shared by a third-type communication node and the first-type communication node, indication information of the communication node is carried through an Msg3 message, and the indication information of the communication node indicates that the communication node is the first-type communication node or the third-type communication node.

In an embodiment, under the condition that PRACH time-frequency resources occupied by the PRACH Preamble corresponding to the first-type communication node include PRACH time-frequency resources shared by the third-type communication node and the first-type communication node, the size of frequency domain resources occupied by the Msg3 message is smaller than or equal to the working bandwidth of the first-type communication node.

In an embodiment, a first type communication node is indicated through signaling to correspond to the use condition of a PRACH Preamble in a PRACH time frequency resource to a second type communication node;

under the condition that the signaling indicates that the first type communication node uses the second type communication node to correspond to the PRACH Preamble in the PRACH time frequency resource, the method comprises at least one of the following steps:

under the condition that the first type communication node supports or enables CR, the PRACH time frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is the PRACH time frequency resource special for the first type communication node;

under the condition that the first type communication node does not support or enable CR, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type communication node;

In the embodiment, it is explicitly indicated through signaling whether the first type communication node may use the PRACH Preamble in the PRACH time-frequency resource corresponding to the second type communication node. Under the condition that the signaling indicates that the first type communication node can use the second type communication node to correspond to the PRACH Preamble in the PRACH time-frequency resource, the method comprises at least one of the following steps: under the condition that the first type communication node supports or enables CR, PRACH time-frequency resources occupied by PRACH Preamble corresponding to the first type communication node can be used by the first type communication node;

and under the condition that the first type communication node does not support or enable CR, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type communication node can be used by the first type communication node.

And under the condition that the signaling indicates that the first type communication node cannot use the PRACH Preamble in the PRACH time frequency resource corresponding to the second type communication node, the PRACH time frequency resource occupied by the PRACH Preamble corresponding to the first type communication node can be used by the first type communication node.

In an embodiment, fig. 5 is a flowchart of a resource selection method provided in an embodiment of the present application. The present embodiment is applied to a first type communication node. As shown in FIG. 5, the present embodiment includes S210-S220.

S210, receiving the PRACH time frequency resource sent by the fourth communication node.

S220, selecting PRACH time frequency resources occupied by PRACH Preamble from the PRACH time frequency resources.

In an embodiment, the location of the PRACH time-frequency resource occupied by the PRACH Preamble selected by the first type communication node includes at least one of:

PRACH time frequency resources occupied by PRACH Preamble corresponding to the second type communication node; a PRACH time-frequency resource dedicated for a first type of communication node.

In an embodiment, under the condition that the PRACH time-frequency resource occupied by the PRACH Preamble selected by the first type communication node is located at a position including the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type communication node, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is configured from the PRACH Preamble corresponding to the second type communication node, which is used for non-contention random access CBRA.

In an embodiment, when an initial bandwidth BWP configured for the first type communication node is greater than a working bandwidth of the first type communication node, the PRACH time-frequency resource occupied by the PRACH Preamble selected by the first type communication node is a PRACH time-frequency resource dedicated to the first type communication node.

In an embodiment, in case the initial BWP configured for the first-type communication node is less than or equal to the operating bandwidth of the first-type communication node, it comprises one of:

under the condition that the first type communication node supports or enables the coverage recovery CR function, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is the PRACH time frequency resource special for the first type communication node;

under the condition that the first type communication node supports or enables CR, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is the PRACH time frequency resource special for the first type communication node;

under the condition that the first type communication node does not support or enable CR, the PRACH time frequency resource occupied by the PRACH Preamble selected by the second type communication node is the PRACH time frequency resource occupied by the PRACH Preamble corresponding to the second type communication node;

and under the condition that the signaling indicates that the first type communication node does not use the PRACH Preamble in the PRACH time frequency resource corresponding to the second type communication node, the PRACH time frequency resource occupied by the PRACH Preamble selected by the first type communication node is the PRACH time frequency resource special for the first type communication node.

In an embodiment, a resource allocation process is described by taking an example where one RO multiplexes preambles of two SSBs, and configures a 4-step PRACH, and where a first type communication node is a reccap UE and a second type communication node is an NR UE. Here, RO refers to PRACH frequency domain resources (occusitions). Fig. 6 is a schematic resource allocation diagram according to an embodiment of the present application. As shown in fig. 6, in SSB0 and SSB1, the PRACH time domain resource occupied by the PRACH Preamble corresponding to the red beacon UE is located in the PRACH time domain resource occupied by the PRACH Preamble corresponding to the NR UE. Specifically, the first information is Starting Preamble-Recdap-R17, the second information is ssb-perRACH-OcvasioninAndCB-Preamble PerSSB-Recdap-R17, and the fourth information is numberOfRA-Preamble GroupA-Recdap-R17.

In an embodiment, SSB-perRACH-occupancy and cb-Preamble PerssB is the Preamble number used to configure one SSB configuration in NR UEs. Wherein, the numberOfRA-Preamble Group is the number of preambles used to configure Group A. In the embodiment, the time domain resource occupied by the PRACH Preamble used by the reccap UE is the Preamble resource of the CFRA in the PRACH Preamble used by the NR UE; the Starting index of the RedCap PRACH Preamble is indicated by Starting Preamble-RedCap-R17. If the initial index of the Recepap PRACH Preamble is not configured, the default is started from the Preamble end index +1 configured by ssb-perRACH-OccasionindCB-Preamble PerSSB; ssb-perRACH-OccasionindCB-Preamble PerSSB-Recmap-R17 is used to indicate the PRACH Preamble number of the Recmap UE; if the RedCap UE supports GroupB, the number OfRA-Preamble Group pA-RedCap-R17 is used to indicate the number of preambles corresponding to Group A.

In an embodiment, a resource allocation process is described by taking an example that one RO multiplexes preambles of two SSBs, and configures a 4-step PRACH and a 2-step PRACH, and a first type communication node is a reccap UE and a second type communication node is an NR UE. Here, RO refers to PRACH frequency domain resources (occusitions). Fig. 7 is a schematic diagram of another resource allocation provided in the embodiment of the present application. As shown in fig. 7, in SSB0 and SSB1, the PRACH time domain resource occupied by the PRACH Preamble corresponding to the red beacon UE is located in the PRACH time domain resource occupied by the PRACH Preamble corresponding to the NR UE. Specifically, the first information is Starting Preamble-Recdap-R17, the second information is ssb-perRACH-OcvasioninAndCB-PreamblePerSSB-Recdap-R17, the third information is msgA-CB-PreamblePerSSB-PersharedRO-R17, the fourth information is numberOfRA-PreambleGroupA-Recdap-R17, and the fifth information is MsgA-numberOfRA-PreambleGroupA-Recdap-R17.

In an embodiment, SSB-perRACH-OccasioninAndCB-Preamble PerSSB is the number of 4-step RACH preambles used to configure NR UEs for one SSB configuration. Wherein, the numberOfRA-Preamble Group is the number of preambles used to configure Group A. Wherein msgA-CB-Preamble PerSSB-PerSharedRO-R16 is the 2-step RACH Preamble number used to configure one SSB configuration in NR UE. Wherein, the number OfRA-Preamble Group pA-R16 is the Preamble number used to configure Group A.

In the embodiment, PRACH Preamble resources used by a RedCap UE occupy the Preamble resources of CFRA in the PRACH Preamble of an NR UE; the Starting index of the RedCap PRACH Preamble is indicated by Starting Preamble-RedCap-R17. If the starting index of the RedCap PRACH Preamble is not configured, default starting from Preamble ending index +1 configured by ssb-perRACH-OccasionindCB-Preamble PerSSB and msgA-CB-Preamble PerSSB-Preamble RO-r 16; ssb-perRACH-OccasionindCB-Preamble PerSSB-RedCap-R17 is used to indicate the 4-step PRACH Preamble number of RedCap UE; msgA-CB-Preamble PerSSB-PerSharedRO-r17 is used to indicate the 2-step PRACH Preamble number for a RedCap UE; and the starting index of the 2-step PRACH Preamble of the RedCap UE is Preamble ending index +1 configured by ssb-perRACH-OccasionindCB-Preamble PerSSB-RedCap-R17; if the RedCap UE supports GroupB, the number OfRA-Preamble Group pA-RedCap-R17 is used to indicate the number of preambles corresponding to Group A of the 4-step RACH, and the MsgA-number OfRA-Preamble Group pA-RedCap-R17 is used to indicate the number of preambles corresponding to Group A of the 2-step RACH.

In an embodiment, a resource allocation process is described by taking an example that one RO multiplexes preambles of two SSBs, a first type communication node is a recscapue, a second type communication node is an NR UE, and a 4-step PRACH is configured. Fig. 8 is a schematic diagram of another resource allocation provided in the embodiment of the present application. As shown in fig. 8, the red map UE and the NR UE use separate PRACH instances to carry the transmission of the PRACH Preamble; in an embodiment, only 4-step RACH is configured, and 2-step RACH is not configured. But it is not to say that the 2-step RACH cannot be supported in this scheme, a scheme similar to the above-mentioned scheme may be adopted to support Preamble configuration of the 2-step RACH.

In an embodiment, the sixth message is ssb-perRACH-occionino dcb-preambiesperssb-redmap-R17-BWReduced, the seventh message is ssb-perRACH-occionino dcb-preambiesperssb-redmap-R17-antennaredend, the eighth message is numberOfRA-preambiesgroupa-redmap-R17-BWReduced, and the ninth message is numberOfRA-preambiesgroupa-redmap-R17-antennaredend. In an embodiment, the sixth information is used to indicate the number of 4-step PRACH preambles of the first Type terminal (i.e., UE Type 1 reload); the seventh information is used to indicate the 4-step PRACH Preamble number of the second Type terminal (i.e. UE Type 2 reload);

if the RedCap UE supports GroupB, the eighth information is used for indicating the GroupA PRACH Preamble number of the UE Type 1 RedCap; the ninth information is used to indicate the number of GroupA PRACH preambles for UE Type 2red cap.

In the description of the above embodiments, the first type communication node refers to a red map UE, and the second type communication node refers to an NR UE.

In an embodiment, fig. 9 is a block diagram of a resource allocation apparatus according to an embodiment of the present application. This embodiment is performed by the fourth communication node. The fourth communication node may be a network side (e.g., a base station). As shown in fig. 9, the present embodiment includes: a configuration module 310 and a transmitter 320.

The configuration module 310 is configured to configure PRACH time-frequency resources occupied by a PRACH random access Preamble of a physical random access channel corresponding to the first type of communication node;

a transmitter 320 configured to transmit the PRACH time-frequency resource to the first type of communication node.

In an embodiment, the location of the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node includes at least one of:

PRACH time frequency resources occupied by PRACH Preamble corresponding to the second type communication node; a PRACH time-frequency resource dedicated for a first type of communication node.

In an embodiment, under the condition that the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is located at a position including the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the second type communication node, the PRACH time-frequency resource occupied by the PRACH Preamble corresponding to the first type communication node is configured from the PRACH Preamble for non-contention random access CBRA corresponding to the second type communication node.