Random access method and equipment

文档序号：196773 发布日期：2021-11-02 浏览：39次中文

阅读说明：本技术 一种随机接入方法及设备 (Random access method and equipment ) 是由孙韶辉缪德山于 2020-04-30 设计创作，主要内容包括：本申请公开了一种随机接入方法及设备。本申请中,终端接收网络设备发送的至少一个上行波束的配置信息,所述配置信息指示上行波束的方向、频带信息中的至少一项,以及对应的PRACH资源；终端根据终端位置以及卫星位置确定对应的上行波束方向,从所述至少一个上行波束中,选择一个方向与确定出的上行波束方向相匹配的上行波束,并在所选择的上行波束上基于该上行波束对应的PRACH资源发起随机接入。(The application discloses a random access method and equipment. In the application, a terminal receives configuration information of at least one uplink beam sent by a network device, wherein the configuration information indicates at least one of the direction and frequency band information of the uplink beam and a corresponding PRACH resource; and the terminal determines the corresponding uplink beam direction according to the terminal position and the satellite position, selects an uplink beam with the direction matched with the determined uplink beam direction from the at least one uplink beam, and initiates random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.)

1. A random access method, comprising:

receiving configuration information of at least one uplink beam sent by network equipment, wherein the configuration information indicates at least one of the direction and frequency band information of the uplink beam and corresponding Physical Random Access Channel (PRACH) resources;

determining a corresponding uplink beam direction according to the terminal position and the satellite position;

selecting an uplink beam with a direction matched with the determined uplink beam direction from the at least one uplink beam;

and initiating random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.

2. The method of claim 1, wherein determining the corresponding uplink beam direction based on the terminal location and the satellite location comprises:

acquiring terminal positioning information and satellite ephemeris information;

determining the position of the satellite according to the satellite ephemeris information;

and determining the uplink beam direction of the terminal according to the terminal positioning information and the position of the satellite.

3. The method of claim 1, further comprising:

receiving corresponding relation information of downlink beams and uplink beams sent by network equipment, wherein one downlink beam corresponds to one uplink beam set;

selecting an uplink beam from the at least one uplink beam having a direction matching the determined uplink beam direction, comprising:

determining an uplink beam set corresponding to a downlink beam currently selected by the terminal according to the corresponding relation information;

and selecting an uplink beam with the direction matched with the determined uplink beam direction according to the configuration information of the uplink beam in the determined uplink beam set.

4. The method according to any of claims 1-3, wherein the uplink beam in the configuration information is a network side uplink receive beam, and the downlink beam is a network side downlink transmit beam.

5. A random access method, comprising:

grouping the at least one uplink beam, wherein one uplink beam group comprises at least one uplink beam;

and sequentially trying to initiate random access on uplink beams in different uplink beam groups based on corresponding PRACH resources, and stopping trying when a random access response is received.

6. The method of claim 5, wherein the uplink beams within the same uplink beam packet have the same beam direction, different frequency bands; alternatively, the uplink beams in the same uplink beam packet have the same frequency band and different directions.

7. The method of claim 5, further comprising:

and if a plurality of random access responses are received, selecting one of the random access responses, and responding to the selected random access response.

8. The method according to any of claims 5-7, wherein the uplink beam in the configuration information is a network side uplink receive beam, and the downlink beam is a network side downlink transmit beam.

9. A random access method, comprising:

sending configuration information of at least one uplink beam, wherein the configuration information indicates at least one of the direction and frequency band information of the uplink beam and corresponding Physical Random Access Channel (PRACH) resources;

receiving a random access request sent by a terminal on one beam of the at least one uplink beam based on a corresponding PRACH resource;

and sending a random access response to the terminal according to the random access request.

10. The method of claim 9, further comprising:

and in the process of sending the configuration information of at least one uplink beam, configuring the same or different PRACH resource sets for the terminal capable of acquiring the positioning information and the terminal incapable of acquiring the positioning information.

11. The method according to claim 9 or 10, wherein the uplink beam in the configuration information is a network side uplink receive beam, and the downlink beam is a network side downlink transmit beam.

12. A terminal, comprising: a processor, memory, transceiver;

the transceiver receives and transmits data under the control of the processor;

the memory storing computer instructions;

the processor is used for reading the computer instructions and executing the following operations:

determining a corresponding uplink beam direction according to the terminal position and the satellite position;

selecting an uplink beam with a direction matched with the determined uplink beam direction from the at least one uplink beam;

and initiating random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.

13. The terminal of claim 12, wherein the operations further comprise:

receiving corresponding relation information of downlink beams and uplink beams sent by network equipment, wherein one downlink beam corresponds to one uplink beam set;

selecting an uplink beam from the at least one uplink beam having a direction matching the determined uplink beam direction, comprising:

determining an uplink beam set corresponding to a downlink beam currently selected by the terminal according to the corresponding relation information;

and selecting an uplink beam with the direction matched with the determined uplink beam direction according to the configuration information of the uplink beam in the determined uplink beam set.

14. A terminal, comprising: a processor, memory, transceiver;

the transceiver receives and transmits data under the control of the processor;

the memory storing computer instructions;

the processor is used for reading the computer instructions and executing the following operations:

grouping the at least one uplink beam, wherein one uplink beam group comprises at least one uplink beam;

15. The terminal of claim 14, wherein uplink beams within the same uplink beam packet have the same beam direction, different frequency bands; alternatively, the uplink beams in the same uplink beam packet have the same frequency band and different directions.

16. A network device, comprising: a processor, memory, transceiver;

the transceiver receives and transmits data under the control of the processor;

the memory storing computer instructions;

the processor is used for reading the computer instructions and executing the following operations:

receiving random access sent by the terminal on one beam of the at least one uplink beam based on the corresponding PRACH resource;

and sending a random access response to the terminal according to the random access request.

17. The network device of claim 16, wherein the operations further comprise:

18. A terminal, comprising:

a receiving module, configured to receive configuration information of at least one uplink beam sent by a network device, where the configuration information indicates at least one of a direction of the uplink beam and frequency band information, and a corresponding physical random access channel PRACH resource;

the processing module is used for determining the corresponding uplink beam direction according to the terminal position and the satellite position; selecting an uplink beam with a direction matched with the determined uplink beam direction from the at least one uplink beam; and

and initiating random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.

19. A terminal, comprising:

a receiving module, configured to receive configuration information of at least one uplink beam sent by a network device, where the configuration information indicates at least one of a direction and frequency band information of the uplink beam, and a corresponding physical random access channel PRACH resource;

the processing module is used for grouping the at least one uplink beam, and one uplink beam group comprises at least one uplink beam; and

20. A network device, comprising:

a sending module, configured to send configuration information of at least one uplink beam, where the configuration information indicates at least one of a direction of the uplink beam and frequency band information, and a corresponding PRACH resource of a physical random access channel;

a receiving module, configured to receive a random access request sent by a terminal on one of the at least one uplink beam based on a corresponding PRACH resource;

and the processing module is used for sending a random access response to the terminal according to the random access request.

21. A computer-readable storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of claims 1-8.

22. A computer-readable storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of claims 9-11.

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a random access method and apparatus.

Background

In satellite communication systems, multiple beams or multi-layer beams (the coverage area of one beam in a multi-layer beam may be included in the coverage area of other beams) are typically configured for improved data communication capacity, and the coverage direction and service time of each beam is varied. Due to the movement of the satellite and the beam hopping, higher requirements are put on the random access for selecting the uplink beam.

Therefore, there is a need to provide a random access mechanism to achieve efficient random access of terminals in a satellite communication system.

Disclosure of Invention

The embodiment of the application provides a random access method and equipment, which are used for realizing random access in a satellite communication system.

In a first aspect, a random access method is provided, including:

receiving configuration information of at least one uplink beam sent by a network device, wherein the configuration information indicates at least one of the direction and frequency band information of the uplink beam and a corresponding Physical Random Access Channel (PRACH) resource;

determining a corresponding uplink beam direction according to the terminal position and the satellite position;

selecting an uplink beam with a direction matched with the determined uplink beam direction from the at least one uplink beam;

and initiating random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.

In the embodiment of the application, the network side sends the beam configuration information to the terminal, and the beam configuration information indicates the direction, the frequency band and the corresponding PRACH resource of the uplink beam, so that the terminal can determine the corresponding uplink beam direction according to the terminal position and the satellite position, and selects an uplink beam with the direction matched with the determined uplink beam direction from at least one uplink beam for random access, thereby realizing random access in the satellite communication system.

In some embodiments, determining the corresponding uplink beam direction from the terminal location and the satellite location comprises: acquiring terminal positioning information and satellite ephemeris information; determining the position of the satellite according to the satellite ephemeris information; and determining the uplink beam direction of the terminal according to the terminal positioning information and the position of the satellite.

In some embodiments, further comprising:

receiving corresponding relation information of downlink beams and uplink beams sent by network equipment, wherein one downlink beam corresponds to one uplink beam set;

selecting an uplink beam from the at least one uplink beam having a direction matching the determined uplink beam direction, comprising:

determining an uplink beam set corresponding to a downlink beam currently selected by the terminal according to the corresponding relation information;

and selecting an uplink beam with the direction matched with the determined uplink beam direction according to the configuration information of the uplink beam in the determined uplink beam set.

In some embodiments, the uplink beam in the configuration information is a network side uplink receiving beam, and the downlink beam is a network side downlink transmitting beam.

In a second aspect, a random access method is provided, including:

grouping the at least one uplink beam, wherein one uplink beam group comprises at least one uplink beam;

In the embodiment of the application, the uplink beams are grouped, so that the terminal can sequentially try to initiate random access on the uplink beams in each uplink beam group, and when the try is successful (that is, a random access response sent by the network device is received), it is indicated that the beam direction of the uplink beam in the currently tried uplink beam group is matched with the position of the terminal, so that the uplink beam matched with the position of the terminal can be obtained for the terminal without satellite positioning capability to perform random access.

In some embodiments, the uplink beams within the same uplink beam packet have the same beam direction, different frequency bands; alternatively, the uplink beams in the same uplink beam packet have the same frequency band and different directions.

In some embodiments, further comprising: and if a plurality of random access responses are received, selecting one of the random access responses, and responding to the selected random access response.

In some embodiments, the uplink beam in the configuration information is a network side uplink receiving beam, and the downlink beam is a network side downlink transmitting beam.

In a third aspect, a random access method is provided, including:

receiving a random access request sent by a terminal on one beam of the at least one uplink beam based on a corresponding PRACH resource;

and sending a random access response to the terminal according to the random access request.

In some embodiments, further comprising: and in the process of sending the configuration information of at least one uplink beam, configuring the same or different PRACH resource sets for the terminal capable of acquiring the positioning information and the terminal incapable of acquiring the positioning information.

In some embodiments, the uplink beam in the configuration information is a network side uplink receiving beam, and the downlink beam is a network side downlink transmitting beam.

In a fourth aspect, a terminal is provided, including:

In a fifth aspect, a terminal is provided, including:

the processing module is used for grouping the at least one uplink beam, and one uplink beam group comprises at least one uplink beam; and sequentially trying to initiate random access on uplink beams in different uplink beam groups based on corresponding PRACH resources, and stopping trying when receiving a random access response.

In a sixth aspect, a network device is provided, comprising:

a receiving module, configured to receive a random access request sent by a terminal on one of the at least one uplink beam based on a corresponding PRACH resource;

and the processing module is used for sending a random access response to the terminal according to the random access request.

In a seventh aspect, a terminal is provided, including: a processor, memory, transceiver; the transceiver receives and transmits data under the control of the processor; the memory storing computer instructions; the processor is configured to read the computer instructions and execute the method according to any one of the first aspect.

In an eighth aspect, there is provided a terminal comprising: a processor, memory, transceiver; the transceiver receives and transmits data under the control of the processor; the memory storing computer instructions; the processor is configured to read the computer instructions and execute the method according to any one of the second aspect.

In a ninth aspect, there is provided a network device comprising: a processor, memory, transceiver; the transceiver receives and transmits data under the control of the processor; the memory storing computer instructions; the processor is configured to read the computer instructions to perform the method according to any one of the third aspects.

In a tenth aspect, there is provided a computer-readable storage medium having stored thereon computer-executable instructions for causing the computer to perform the method of any of the first or second aspects above.

In an eleventh aspect, there is provided a computer-readable storage medium having stored thereon computer-executable instructions for causing the computer to perform the method of any of the above third aspects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a beam mapping of a satellite system in an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating an information configuration flow in an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a random access procedure in an embodiment of the present application;

fig. 4 illustrates a random access flow diagram in a further embodiment of the present application;

fig. 5 is a schematic structural diagram illustrating a network device provided in an embodiment of the present application;

fig. 6 and 7 are schematic structural diagrams of a terminal provided by an embodiment of the present application;

fig. 8 is a schematic structural diagram illustrating a network device according to another embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal according to another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Some terms in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

(1) In the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning.

(2) In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(3) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

(4) The network device is a device for providing a wireless communication function for the terminal, and includes but is not limited to: a gbb in 5G, a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved node B or home node B, HNB), a BaseBand Unit (BBU), a transmission point (TRP), a Transmission Point (TP), a mobile switching center (msc), and the like. The base station in the present application may also be a device that provides a terminal with a wireless communication function in other communication systems that may appear in the future. In the embodiments of the present application, a "base station" is described as an example. In satellite communication systems, base stations may be classified as terrestrial base stations, also known as gateway stations, or as satellite-borne base stations, i.e. base stations that are part of the satellite load. In the present application, "base station" may also refer to a base station for terrestrial communications.

(5) A terminal is a device that can provide voice and/or data connectivity to a user. For example, the terminal device includes a handheld device, an in-vehicle device, and the like having a wireless connection function. Currently, the terminal device may be: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), or a wireless terminal in smart home (smart home), etc.

(6) A beam may correspond to a cell or a carrier or a fractional Bandwidth (BWP). In the NR cell, the bandwidths of different BWPs are different, the configuration parameters of other physical layer channels/signals of each BWP are usually configured independently, and the network device may configure different BWPs to the terminal, so that the uplink and downlink bandwidths used by the terminal are variable.

One beam may be designated as an uplink beam or a downlink beam, and in the embodiment of the present application, a beam designated as a downlink is referred to as a downlink beam, and a beam designated as an uplink is referred to as an uplink beam. The uplink beam is a network side uplink receiving beam, and the downlink beam is a network side downlink transmitting beam. That is, in the embodiment of the present application, the uplink beam is defined from the perspective of the network side, that is, the uplink receiving beam formed by the antenna of the base station or the satellite does not include the uplink transmitting beam of the terminal.

In a satellite communication system, beam signals of a satellite are distinguished from downlink transmission and uplink reception, the directions of uplink beams and downlink beams can be configured independently, and the mapping relation between frequency and beams can also be configured flexibly. As shown in fig. 1, one downlink beam may correspond to only one uplink beam, that is, the downlink beam and the uplink beam are paired one to one, and one downlink beam may also correspond to a plurality of uplink beams.

In a satellite communication system, beams can be divided into a "first beam" and a "second beam" according to the size of the coverage area of the beam, and the coverage area of the second beam is larger than that of the first beam. The first beam may also be referred to as a spot beam, and the second beam may also be referred to as a broad beam. In a satellite communication system, due to asymmetric uplink and downlink transmission gains or implementation limitations of satellite beams, a downlink beam is generally transmitted by a wide beam, and an uplink beam is received by a wide beam or a narrow beam.

In terms of uplink beam selection and random access, the beam selection method of the terrestrial wireless communication system cannot be directly applied to the satellite communication system because the characteristics of satellite communication are not considered. The terminal for satellite communication generally has position management capability, and the satellite beam is more complicated in frequency, direction and array management than the terrestrial communication, so the uplink beam selection method directly using the terrestrial communication will bring larger transmission delay and more overhead.

The embodiment of the application provides a random access method for satellite communication, wherein in the aspect of uplink beam selection, beam selection can be carried out based on a terminal position, so that the requirements of beam selection and random access of a terminal can be effectively met. Based on the method of the embodiment, beam selection is performed based on terminal position information, or uplink random access attempt is performed based on packet beams, and the basic principle can be applied to ground mobile communication and also satellite communication.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 2, a schematic diagram of an information configuration process provided in the embodiment of the present application is shown, in which a network device may send beam configuration information to a terminal. As shown, the process may include:

s201: the network device sends configuration information of at least one uplink beam, where the configuration information indicates at least one of a direction of the uplink beam and frequency band information, and a corresponding Physical Random Access Channel (PRACH) resource.

Wherein, the direction of the uplink beam can be represented by the angle of the uplink beam.

In this step, the network device may send a system message, which carries the configuration information of the beam, so as to send the configuration information to the terminal.

In some embodiments, the network device may further notify the terminal of the correspondence information between the downlink beam and the uplink beam, for example, the configuration information may include the correspondence information between the downlink beam and the uplink beam. One downlink beam may correspond to one or more uplink beams, that is, one downlink beam may correspond to one uplink beam set.

In some embodiments, the network device may configure different sets of PRACH resources for the type of terminal (whether satellite positioning capability, also referred to as global navigation satellite system positioning (GNSS) capability is available) and may also configure the same set of PRACH resources. The terminal with the satellite positioning capability can acquire the positioning information of the terminal, and the terminal without the satellite positioning capability cannot acquire the positioning information of the terminal.

Specifically, in the process of sending the configuration information of at least one uplink beam, the network device may configure the same or different PRACH resource sets for a terminal that can acquire positioning information (a terminal with satellite positioning capability) and a terminal that cannot acquire positioning information (a terminal without satellite positioning capability).

S202: and the terminal receives the configuration information sent by the network equipment.

In this step, the terminal may obtain the beam configuration information and the PRACH resource allocation information carried in the system message by listening to the system message sent by the network device.

And the terminal stores the configuration information sent by the network equipment so as to select an uplink beam for random access according to the configuration information during random access.

In the embodiment of the present application, a terminal with satellite positioning capability and a terminal without satellite positioning capability select uplink beams in different manners to perform random access, and a random access procedure of the terminal with satellite positioning capability is described below with reference to fig. 3, and a random access procedure of the terminal without satellite positioning capability is described with reference to fig. 4.

Referring to fig. 3, a schematic diagram of a random access procedure provided in this embodiment of the present application, the procedure describes a process of selecting an uplink beam by a terminal with satellite positioning capability in a random access procedure, and as shown in the figure, the procedure may include:

s301: the terminal receives configuration information of at least one uplink beam sent by the network equipment, wherein the configuration information indicates at least one of the direction and the frequency band information of the uplink beam and a corresponding PRACH resource.

For the related content of the configuration information and the manner of sending the configuration information by the network device, reference may be made to the foregoing embodiments, which are not repeated here.

If the direction of the uplink beam is not indicated in the configuration information of the network, the default is that the beam is in the wide direction, and the terminal considers that the configured uplink beam can cover the ground area to which the terminal belongs. At this time, the terminal selects a PRACH resource corresponding to one of the configured uplink beams to perform signal transmission.

S302: and the terminal determines the corresponding uplink beam direction according to the terminal position and the satellite position.

In some embodiments, the terminal may obtain terminal positioning information and satellite ephemeris information, determine a position of the satellite according to the satellite ephemeris information, and determine an uplink beam direction of the terminal according to the terminal positioning information and the position of the satellite.

The terminal can acquire position information of the terminal based on a Global Positioning System (GPS) or a Beidou system and other satellite positioning systems. The terminal can use the satellite ephemeris information stored by the terminal, can also obtain the satellite ephemeris information based on network broadcasting, and can also obtain the satellite ephemeris information in other modes such as off-line copying. And judging the position of the satellite at a certain moment according to the ephemeris information of the satellite.

S303: and the terminal selects an uplink beam with the direction matched with the determined uplink beam direction from at least one uplink beam indicated by the configuration information.

In some embodiments, the terminal may further receive correspondence information between downlink beams and uplink beams sent by the network device, where one downlink beam may correspond to one or more uplink beams. When the terminal selects the uplink beam, the terminal may determine an uplink beam set (one uplink beam set includes at least one uplink beam) corresponding to the downlink beam currently selected by the terminal according to the corresponding relationship information, and select an uplink beam whose direction matches the determined uplink beam direction according to the configuration information of the uplink beam in the determined uplink beam set.

S304: and the terminal initiates random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.

In this step, the terminal may send a PRACH signal (i.e., a random access request) to the network device on the selected uplink beam to initiate a random access process, and the network device detects and determines the PRACH signal of the terminal, and sends a response signal (i.e., a random access response) of the PRACH signal to the terminal when the strength of the signal exceeds a certain threshold. The implementation method of the random access process may adopt a method specified by a communication protocol, which is not limited in the embodiment of the present application.

It can be seen from the above process that the network side sends the beam configuration information to the terminal, and the beam configuration information indicates the direction, frequency band and corresponding PRACH resource of the uplink beam, so that the terminal can determine the corresponding uplink beam direction according to the terminal position and the satellite position, and selects an uplink beam whose direction matches the determined uplink beam direction from at least one uplink beam for random access, thereby implementing random access in the satellite communication system.

Referring to fig. 4, a schematic diagram of a random access procedure provided in this embodiment of the present application describes a process of selecting an uplink beam in a random access procedure for a terminal without satellite positioning capability, but the method may also be applied to a terminal with satellite positioning capability. As shown, the process may include:

s401: the terminal receives configuration information of at least one uplink beam sent by the network equipment, wherein the configuration information indicates at least one of the direction and the frequency band information of the uplink beam and a corresponding PRACH resource.

S402: and the terminal groups the at least one uplink beam, and one uplink beam group comprises at least one uplink beam.

In some embodiments, beam grouping may be based on the following principles: the uplink beams in the same uplink beam group have the same beam direction and different frequency bands; alternatively, the uplink beams in the same uplink beam packet have the same frequency band and different directions.

S403: and the terminal sequentially tries to initiate random access on uplink beams in different uplink beam groups based on corresponding PRACH resources, and stops trying when receiving random access response.

In this step, the terminal may send PRACH signals (i.e., random access requests) to the network device on each uplink beam in the uplink beam packet to initiate a random access process, the network device detects and determines the PRACH signal of the terminal, and sends a response signal (i.e., random access response) of the PRACH to the terminal when the strength of the signal exceeds a certain threshold. And the terminal respectively monitors the random access responses corresponding to different uplink beams in the time appointed on the downlink beams. The terminal has no positioning capability, so that the uplink beam direction cannot be directly selected, the PRACH signal is transmitted in different beam directions or frequency bands occupied by different beams, and the network detects the signal transmitted by the terminal, so that the beam coverage range of the terminal is determined.

If the terminal does not receive the random access response sent by the network equipment within the set time after respectively sending the random access request to the network equipment on each uplink beam in one uplink beam group, the terminal selects the next uplink beam group and repeats the operation. When the terminal receives the random access response sent by the network equipment, the attempt is stopped, namely, the next uplink beam group is not selected to send the random access request, but the currently received random access response is processed to complete the subsequent random access process.

The implementation method of the random access process may adopt a method specified by a communication protocol, which is not limited in the embodiment of the present application.

Since a plurality of uplink beams may be included in an uplink beam packet, if a terminal attempts to receive a plurality of random access responses during a process of initiating random access by an uplink beam in the uplink beam packet, it may select one of the plurality of random access responses, for example, select an earliest received random access response, and perform a subsequent random access process based on the random access response.

As can be seen from the above description, grouping the uplink beams enables the terminal to sequentially try to initiate random access on the uplink beams in each uplink beam group, and when the attempt is successful (i.e., a random access response sent by the network device is received), it indicates that the beam direction of the uplink beam in the currently tried uplink beam group matches the terminal position, so that the uplink beam matching the terminal position can be obtained for random access. The method described above can be applied to terminals without satellite positioning capability.

In summary, the embodiments of the present application provide a method for selecting uplink beams in satellite communication, which determines different uplink beam selection strategies according to different positioning capabilities of terminals, so that the positioning capability of the terminal can be effectively utilized to quickly and accurately select a suitable uplink beam, thereby completing a random access process.

Based on the same technical concept, the embodiment of the application also provides the network equipment. The network device may implement the functions of the network device side in the foregoing embodiments.

Fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present application. The network device may include: a processing module 501, a sending module 502 and a receiving module 503.

A sending module 502, configured to send configuration information of at least one uplink beam, where the configuration information indicates at least one of a direction of the uplink beam and frequency band information, and a corresponding PRACH resource;

a receiving module 503, configured to receive a random access request sent by a terminal on one of the at least one uplink beam based on a corresponding PRACH resource;

a processing module 501, configured to send a random access response to the terminal according to the random access request.

In some embodiments, the processing module 501 is further configured to: and in the process of sending the configuration information of at least one uplink beam, configuring the same or different PRACH resource sets for the terminal capable of acquiring the positioning information and the terminal incapable of acquiring the positioning information.

In some embodiments, the uplink beam in the configuration information is a network side uplink receiving beam, and the downlink beam is a network side downlink transmitting beam.

It should be noted that, the network device provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.

Based on the same technical concept, the embodiment of the application also provides a terminal. The terminal can implement the functions of the terminal side in the foregoing embodiments.

Referring to fig. 6, a schematic structural diagram of a terminal provided in the embodiment of the present application is shown. The terminal may include: a processing module 601, a sending module 602, and a receiving module 603.

A receiving module 603, configured to receive configuration information of at least one uplink beam sent by a network device, where the configuration information indicates at least one of a direction of the uplink beam and frequency band information, and a corresponding PRACH resource;

a processing module 601, configured to determine a corresponding uplink beam direction according to a terminal position and a satellite position; selecting an uplink beam with a direction matched with the determined uplink beam direction from the at least one uplink beam; and initiating random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.

In some embodiments, the processing module 601 is specifically configured to: acquiring terminal positioning information and satellite ephemeris information; determining the position of the satellite according to the satellite ephemeris information; and determining the uplink beam direction of the terminal according to the terminal positioning information and the position of the satellite.

In some embodiments, the receiving module 603 is further configured to: receiving corresponding relation information of downlink beams and uplink beams sent by network equipment, wherein one downlink beam corresponds to one uplink beam set; the processing module 601 is specifically configured to: determining an uplink beam set corresponding to a downlink beam currently selected by the terminal according to the corresponding relation information; and selecting an uplink beam with the direction matched with the determined uplink beam direction according to the configuration information of the uplink beam in the determined uplink beam set.

In some embodiments, the uplink beam in the configuration information is a network side uplink receiving beam, and the downlink beam is a network side downlink transmitting beam.

It should be noted that, the terminal provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

Based on the same technical concept, the embodiment of the application also provides a terminal. The terminal can implement the functions of the terminal side in the foregoing embodiments.

Referring to fig. 7, a schematic structural diagram of a terminal provided in the embodiment of the present application is shown. The terminal may include: a processing module 701, a sending module 702, and a receiving module 703.

A receiving module 703, configured to receive configuration information of at least one uplink beam sent by a network device, where the configuration information indicates at least one of a direction of the uplink beam and frequency band information, and a corresponding PRACH resource;

a processing module 701, configured to group the at least one uplink beam, where one uplink beam group includes at least one uplink beam; and sequentially trying to initiate random access on uplink beams in different uplink beam groups based on corresponding PRACH resources, and stopping trying when a random access response is received.

In some embodiments, the processing module 701 is further configured to: and if a plurality of random access responses are received, selecting one of the random access responses, and responding to the selected random access response.

In some embodiments, the uplink beam in the configuration information is a network side uplink receiving beam, and the downlink beam is a network side downlink transmitting beam.

Fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown, the network device may include: a processor 801, a memory 802, a transceiver 803, and a bus interface 804.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations. The transceiver 803 is used for receiving and transmitting data under the control of the processor 801.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 801, and various circuits, represented by the memory 802, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations.

The processes disclosed in the embodiments of the present application can be applied to the processor 801 or implemented by the processor 801. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 801. The processor 801 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 801 is configured to read the computer instructions in the memory 802 and execute the functions implemented by the network device in the flow chart shown in fig. 2.

Specifically, the processor 801 may read the computer instructions in the memory 802, performing the following operations: sending configuration information of at least one uplink beam, wherein the configuration information indicates at least one of the direction and the frequency band information of the uplink beam and a corresponding PRACH resource; receiving random access sent by the terminal on one beam of the at least one uplink beam based on the corresponding PRACH resource; and sending a random access response to the terminal according to the random access request.

Based on the same technical concept, the embodiment of the application also provides a terminal. The terminal can implement the functions of the terminal side in the foregoing embodiments.

Referring to fig. 9, a schematic structural diagram of a terminal provided in the embodiment of the present application is shown.

As shown, the terminal may include: a processor 901, a memory 902, a transceiver 903, and a bus interface 904.

The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations. The transceiver 903 is used for receiving and transmitting data under the control of the processor 901.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 901, and various circuits, represented by memory 902, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations.

The process disclosed in the embodiment of the present application may be applied to the processor 901, or implemented by the processor 901. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901. The processor 901 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 901 is configured to read the computer instructions in the memory 902 and execute the functions implemented by the terminal in the flow shown in fig. 3 or fig. 4.

Specifically, the processor 901 can read the computer instructions in the memory 902 to perform the following operations: receiving configuration information of at least one uplink beam sent by network equipment, wherein the configuration information indicates at least one of the direction and frequency band information of the uplink beam and a corresponding PRACH resource; determining a corresponding uplink beam direction according to the terminal position and the satellite position; selecting an uplink beam with a direction matched with the determined uplink beam direction from the at least one uplink beam; and initiating random access on the selected uplink beam based on the PRACH resource corresponding to the uplink beam.

In other embodiments, the processor 901 may read the computer instructions in the memory 902 to perform the following operations: receiving configuration information of at least one uplink beam sent by network equipment, wherein the configuration information indicates at least one of the direction and the frequency band information of the uplink beam and a corresponding PRACH resource; grouping the at least one uplink beam, wherein one uplink beam group comprises at least one uplink beam; and sequentially trying to initiate random access on uplink beams in different uplink beam groups based on corresponding PRACH resources, and stopping trying when a random access response is received.

Embodiments of the present application further provide a computer-readable storage medium, where computer-executable instructions are stored, and the computer-executable instructions are used to enable a computer to execute the method performed by the network device in the foregoing embodiments.

The embodiment of the present application further provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and the computer-executable instructions are used to enable a computer to execute the method executed by the terminal in the foregoing embodiment.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

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