CN114258145B

CN114258145B - Random access method, device, base station, terminal and storage medium

Info

Publication number: CN114258145B
Application number: CN202010997173.0A
Authority: CN
Inventors: 王俊伟; 刘天心; 郑方政
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2023-08-29
Anticipated expiration: 2040-09-21
Also published as: WO2022057314A1; CN114258145A

Abstract

The application discloses a random access method, a random access device, a base station, a terminal and a storage medium, and relates to the technical field of wireless communication. The specific implementation scheme is as follows: the method comprises the steps of receiving a random access request sent by a terminal, sending a random access response to the terminal, wherein the random access response carries measurement indication information and is used for indicating the terminal to detect the beam quality of a synchronous broadcast block SSB, receiving a Radio Resource Control (RRC) connection request sent by the terminal, wherein the RRC connection request carries quality detection information, the quality detection information is obtained by detecting the beam quality according to the measurement indication information by the terminal, and sending a first RRC connection response to the terminal, wherein the first RRC connection response carries the beam indication information and is used for indicating the terminal to determine a target SSB for sending and/or receiving data according to the quality detection information.

Description

Random access method, device, base station, terminal and storage medium

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a random access method, a device, a base station, a terminal, and a storage medium.

Background

The random access is a basic function of wireless communication, and after the terminal is synchronized with the uplink of the system through the random access process, the terminal can be scheduled by the system to perform uplink transmission. Among them, the random access procedure has two forms, allowing either contention-based access (meaning inherent collision risk) or contention-free access.

In contention-based random access, the base station configures a beam associated with the current random access procedure. And at high frequency bands above 52.6GHz, has higher propagation path loss than at low frequency bands. In order to cope with the loss of fast propagation and expand the coverage distance, the beam width of the beam forming operation needs to be narrower, the beam with the narrow width concentrates the energy of data and control transmission, the data receiving quality of the system is improved, but the coverage area of the beam with the narrow width is narrow, and more frequent synchronization needs to be carried out to keep communication in the moving process of the terminal. Therefore, in the contention-based random access procedure, beam transmission management is important to improve the success rate of the random access procedure.

Disclosure of Invention

The application provides a random access method, a device, a base station, a terminal and a storage medium for improving the success rate of a random access process.

According to an aspect of the present application, there is provided a random access method for a base station, including:

receiving a random access request sent by a terminal;

transmitting a random access response to the terminal, wherein the random access response carries measurement indication information and is used for indicating the terminal to detect the beam quality of the synchronous broadcast block SSB;

receiving a Radio Resource Control (RRC) connection request sent by the terminal, wherein the RRC connection request carries quality detection information, and the quality detection information is obtained by the terminal through beam quality detection according to the measurement indication information;

and sending a first RRC connection response to the terminal, wherein the first RRC connection response carries beam indication information which is used for indicating the terminal to determine a target SSB for sending and/or receiving data according to the quality detection information.

Optionally, in a first possible implementation manner of the first aspect, before the receiving the random access request sent by the terminal, the method further includes:

and broadcasting a System Information Block (SIB) message to the terminal, wherein the SIB message carries an association relation among SSBs, the association relation is used for determining candidate SSBs for quality detection, and the candidate SSBs comprise a first SSB adopted by the terminal for sending the random access request and a second SSB with the association relation with the first SSB.

Optionally, in a second possible implementation manner of the first aspect, the receiving a radio resource control RRC connection request sent by the terminal includes:

and monitoring the beam corresponding to the first SSB and the beam corresponding to the second SSB to receive the RRC connection request.

In a third possible implementation manner of the first aspect, optionally,

the quality detection information is further used for indicating the terminal to monitor SSB corresponding to the beam with failed avoidance when sending the RRC connection request, and the sending the first RRC connection response to the terminal includes:

according to the quality detection information, eliminating SSB corresponding to the beam with failed monitoring avoidance and SSB with quality lower than a set quality threshold from the first SSB and the second SSB to obtain reserved SSB;

according to the reserved SSB, monitoring a corresponding wave beam to determine a wave beam with successful monitoring avoidance;

and if the SSB corresponding to the beam with successful monitoring avoidance is the same as the SSB corresponding to the beam for receiving the random access request, sending a first RRC connection response.

In a fourth possible implementation manner of the first aspect, optionally,

and monitoring the corresponding wave beam according to the reserved SSB to determine the wave beam with successful monitoring avoidance, and then further comprising:

And if the SSB corresponding to the beam with successful monitoring avoidance is different from the SSB for receiving the random access request, sending the second RRC connection response, wherein the second RRC connection response does not carry the beam indication information.

Optionally, in a fifth possible implementation manner of the first aspect, the association relationship includes: a list of associations;

the association list comprises indexes of the first SSB and indexes of the second SSB with association relation.

Optionally, in a sixth possible implementation manner of the first aspect, the association relationship includes: associating strategies;

the association policy comprises a number threshold, wherein the number threshold is used for determining the first SSB and the second SSB with association relation in an available SSB sequence of the base station, and the number of continuous or discontinuous available SSBs between the second SSB and the first SSB is smaller than or equal to the number threshold.

Optionally, in a seventh possible implementation manner of the first aspect, the number threshold includes a number threshold along a positive order and/or a negative order of the available SSB sequences.

Optionally, in an eighth possible implementation manner of the first aspect, the SIB message further carries reference signal configuration information, which is used to indicate channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

The beam indication information includes: the method comprises the steps of determining strategy indication information of the target SSB, determining strategy indication information of a target CSI-RS from the target SSB associated CSI-RS, and combining one or more of an index value of the target CSI-RS and an index value of the target SSB.

Optionally, in a ninth possible implementation manner of the first aspect, an index value of the CSI-RS associated with the SSB having the index value of M is greater than or equal to (nxm) and less than or equal to (nxm+n-1); wherein N is the total number of CSI-RSs associated with a single SSB, and N and M are natural numbers.

Optionally, in a tenth possible implementation manner of the first aspect, the quality detection information includes: one or more of an index value of a best quality SSB, a reference signal received power value RSRP of each of the candidate SSBs, an RSRP of each of the candidate SSB-associated CSI-RS, a quality rank of each of the candidate SSBs, and a quality rank of each of the candidate SSB-associated CSI-RS.

Optionally, in an eleventh possible implementation manner of the first aspect, after the sending a random access response to the terminal, the method further includes:

and sending a retransmission instruction of the RRC connection request to the terminal, wherein the retransmission instruction carries the measurement instruction information.

Optionally, in a twelfth possible implementation manner of the first aspect, the target SSB is configured to receive data on a downlink shared channel PDSCH and/or send data on an uplink shared channel PUSCH by the terminal.

Optionally, in a thirteenth possible implementation manner of the first aspect, the measurement indication information is carried on reserved bits in downlink control information DCI.

Optionally, in a fourteenth possible implementation manner of the first aspect, the beam indication information is carried in a downlink allocation index field in downlink control information DCI.

According to a second aspect of the present application, there is provided a random access method for a terminal, comprising:

sending a random access request to a base station;

receiving measurement indication information sent by the base station;

transmitting a Radio Resource Control (RRC) connection request to the base station, wherein the RRC connection request carries quality detection information, and the quality detection information is obtained by detecting the beam quality of a synchronous broadcast block (SSB) according to the measurement indication information by a terminal;

receiving an RRC connection response sent by the base station, wherein the RRC connection response carries beam indication information and is used for indicating a terminal to determine a target SSB according to the quality detection information;

And transmitting and/or receiving data by adopting the target SSB.

Optionally, in a first possible implementation manner of the second aspect, before the sending a random access request to the base station, the method further includes:

receiving a System Information Block (SIB) message broadcast by the base station, wherein the SIB message carries an association relation among SSBs;

determining the candidate SSB according to the association relation; the candidate SSB comprises a first SSB adopted by the terminal for sending the random access request and a second SSB which has an association relation with the first SSB.

Optionally, in a second possible implementation manner of the second aspect, the sending a radio resource control RRC connection request to the base station includes:

monitoring the beam corresponding to the first SSB and the beam corresponding to the second SSB to determine a beam with successful monitoring avoidance;

and transmitting the RRC connection request by adopting the beam with the successful monitoring avoidance.

Optionally, in a third possible implementation manner of the second aspect,

the number of the beams for monitoring and avoiding success is multiple; the sending the RRC connection request by using the beam with the successful listening avoidance includes:

Screening the beams successfully monitored and avoided according to the quality detection information to obtain reserved beams;

and transmitting the RRC connection request by adopting the reserved beam.

Optionally, in a fourth possible implementation manner of the second aspect,

after the monitoring is performed on the beam corresponding to the first SSB and the beam corresponding to the second SSB to determine the beam with successful monitoring avoidance, the method further includes:

deleting a reference signal receiving power value (RSRP) of the SSB corresponding to the beam with failed monitoring avoidance in the quality detection information;

or in the quality detection information, updating quality sequencing of SSB corresponding to the beam with failed monitoring avoidance;

or in the quality detection information, updating quality sequencing of SSB corresponding to the beam with failed monitoring avoidance, and re-sequencing the SSB with successful monitoring avoidance;

or deleting the index value of the SSB corresponding to the beam with failed monitoring avoidance in the quality detection information.

Optionally, in a fifth possible implementation manner of the second aspect, the receiving an RRC connection response sent by the base station includes:

and monitoring the beam corresponding to the first SSB and the beam with successful monitoring avoidance so as to receive the RRC connection response sent by the base station.

Optionally, in a sixth possible implementation manner of the second aspect, the association relationship includes: a list of associations;

Optionally, in a seventh possible implementation manner of the second aspect, the association relationship includes: associating strategies;

Optionally, in an eighth possible implementation manner of the second aspect, the number threshold includes a number threshold along a positive order and/or a negative order of the available SSB sequences.

Optionally, in a ninth possible implementation manner of the second aspect, the SIB message further carries reference signal configuration information, which is used to indicate channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

The beam indication information includes: one or more combinations of the determination policy indication information of the target SSB, the determination policy indication information for determining a target CSI-RS from the target SSB-associated CSI-RSs, an index value of the target CSI-RS, and an index value of the target SSB

Optionally, in a tenth possible implementation manner of the second aspect, the quality detection information includes: one or more of an index value of a best quality SSB, a reference signal received power value RSRP of each of the candidate SSBs, an RSRP of each of the candidate SSB-associated CSI-RS, a quality rank of each of the candidate SSBs, and a quality rank of each of the candidate SSB-associated CSI-RS.

Optionally, in an eleventh possible implementation manner of the second aspect, the receiving measurement indication information sent by the base station includes:

receiving a retransmission instruction of the RRC connection request sent by the base station, wherein the retransmission instruction carries the measurement instruction information;

or receiving a random access response sent by the base station, wherein the random access response carries the measurement indication information.

Optionally, in a twelfth possible implementation manner of the second aspect, the measurement indication information is carried on reserved bits in downlink control information DCI; the beam indication information is carried in a downlink allocation index field in downlink control information DCI.

According to a third aspect of the present application there is provided a base station comprising a memory, a transceiver and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

receiving a random access request sent by a terminal;

Optionally, in a first possible implementation manner of the third aspect, before the receiving the random access request sent by the terminal, the method further includes:

Optionally, in a second possible implementation manner of the third aspect, the receiving a radio resource control RRC connection request sent by the terminal includes:

Optionally, in a third possible implementation manner of the third aspect, the quality detection information is further used to instruct the terminal to monitor SSB corresponding to a beam with failed back-off when sending the RRC connection request, and the sending a first RRC connection response to the terminal includes:

Optionally, in a fourth possible implementation manner of the third aspect, after the monitoring a corresponding beam according to the reserved SSB to determine a beam that monitors to avoid success, the method further includes:

Optionally, in a fifth possible implementation manner of the third aspect, the association relationship includes: a list of associations;

Optionally, in a sixth possible implementation manner of the third aspect, the association relationship includes: associating strategies;

Optionally, in a seventh possible implementation manner of the third aspect, the number threshold includes a number threshold along a positive order and/or a negative order of the available SSB sequences.

Optionally, in an eighth possible implementation manner of the third aspect, the SIB message further carries reference signal configuration information, which is used to indicate channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

Optionally, in a ninth possible implementation manner of the third aspect, an index value of the CSI-RS associated with the SSB having the index value of M is greater than or equal to (nxm) and less than or equal to (nxm+n-1); wherein N is the total number of CSI-RSs associated with a single SSB, and N and M are natural numbers.

Optionally, in a tenth possible implementation manner of the third aspect, the quality detection information includes: one or more of an index value of a best quality SSB, a reference signal received power value RSRP of each of the candidate SSBs, an RSRP of each of the candidate SSB-associated CSI-RS, a quality rank of each of the candidate SSBs, and a quality rank of each of the candidate SSB-associated CSI-RS.

Optionally, in an eleventh possible implementation manner of the third aspect, after the sending a random access response to the terminal, the method further includes:

Optionally, in a twelfth possible implementation manner of the third aspect, the target SSB is configured to receive data on a downlink shared channel PDSCH and/or transmit data on an uplink shared channel PUSCH by the terminal.

Optionally, in a thirteenth possible implementation manner of the third aspect, the measurement indication information is carried on reserved bits in downlink control information DCI.

Optionally, in a fourteenth possible implementation manner of the third aspect, the beam indication information is carried in a downlink allocation index field in downlink control information DCI.

According to a fourth aspect of the present application there is provided a terminal comprising a memory, a transceiver and a processor;

Sending a random access request to a base station;

receiving measurement indication information sent by the base station;

transmitting a Radio Resource Control (RRC) connection request to the base station, wherein the RRC connection request carries quality detection information, and the quality detection information is obtained by the terminal detecting the beam quality of a synchronous broadcast block (SSB) according to the measurement indication information;

receiving an RRC connection response sent by the base station, wherein the RRC connection response carries beam indication information and is used for indicating the terminal to determine a target SSB according to the quality detection information;

and transmitting and/or receiving data by adopting the target SSB.

Optionally, in a first possible implementation manner of the fourth aspect, before the sending a random access request to the base station, the method further includes:

Optionally, in a second possible implementation manner of the fourth aspect, the sending a radio resource control RRC connection request to the base station includes:

and transmitting the RRC connection request by adopting the beam with the successful monitoring avoidance. Optionally, in a third possible implementation manner of the fourth aspect,

and transmitting the RRC connection request by adopting the reserved beam.

Optionally, in a fourth possible implementation manner of the fourth aspect,

Optionally, in a fifth possible implementation manner of the fourth aspect, the receiving an RRC connection response sent by the base station includes:

Optionally, in a sixth possible implementation manner of the fourth aspect, the association relationship includes: a list of associations;

Optionally, in a seventh possible implementation manner of the fourth aspect, the association relationship includes: associating strategies;

Optionally, in an eighth possible implementation manner of the fourth aspect, the number threshold includes a number threshold along a positive order and/or a negative order of the available SSB sequences.

Optionally, in a ninth possible implementation manner of the fourth aspect, the SIB message further carries reference signal configuration information, which is used to indicate channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

Optionally, in a tenth possible implementation manner of the fourth aspect, the quality detection information includes: one or more of an index value of a best quality SSB, a reference signal received power value RSRP of each of the candidate SSBs, an RSRP of each of the candidate SSB-associated CSI-RS, a quality rank of each of the candidate SSBs, and a quality rank of each of the candidate SSB-associated CSI-RS.

Optionally, in an eleventh possible implementation manner of the fourth aspect, the receiving measurement indication information sent by the base station includes:

Optionally, in a twelfth possible implementation manner of the fourth aspect, the measurement indication information is carried on reserved bits in downlink control information DCI; the beam indication information is carried in a downlink allocation index field in downlink control information DCI.

According to a fifth aspect of the present application, there is provided a random access apparatus for a base station, comprising:

the first receiving module is used for receiving a random access request sent by the terminal;

a first sending module, configured to send a random access response to the terminal, where the random access response carries measurement indication information, and is configured to instruct the terminal to detect beam quality of the synchronous broadcast block SSB;

the second receiving module is used for receiving a Radio Resource Control (RRC) connection request sent by the terminal, wherein the RRC connection request carries quality detection information, and the quality detection information is obtained by the terminal through beam quality detection according to the measurement indication information;

And the second sending module is used for sending a first RRC connection response to the terminal, wherein the first RRC connection response carries beam indication information and is used for indicating the terminal to determine a target SSB for sending and/or receiving data according to the quality detection information.

According to a sixth aspect of the present application, there is provided a random access apparatus for a terminal, comprising:

the first sending module is used for sending a random access request to the base station;

the first receiving module is used for receiving measurement indication information sent by the base station;

a second sending module, configured to send a radio resource control RRC connection request to the base station, where the RRC connection request carries quality detection information, where the quality detection information is obtained by detecting, by a terminal, beam quality of a synchronous broadcast block SSB according to the measurement indication information;

the second receiving module is used for receiving an RRC connection response sent by the base station, wherein the RRC connection response carries beam indication information and is used for indicating a terminal to determine a target SSB according to the quality detection information;

and the transmission module is used for transmitting and/or receiving data by adopting the target SSB.

According to a seventh aspect of the present application, there is provided a processor-readable storage medium storing a computer program for causing the processor to execute the random access method according to the first aspect.

According to an eighth aspect of the present application, there is provided a processor-readable storage medium storing a computer program for causing the processor to execute the random access method according to the second aspect.

The solution provided by the embodiment of the application comprises the following beneficial effects:

in the application, a base station receives a random access request sent by a terminal, sends a random access response to the terminal, the random access response carries measurement indication information and is used for indicating the terminal to detect the beam quality of a synchronous broadcast block SSB, the radio resource control RRC connection request sent by the terminal is received, the RRC connection request carries quality detection information, the quality detection information is obtained by the terminal according to the measurement indication information by carrying out beam quality detection, and a first RRC connection response is sent to the terminal, wherein the first RRC connection response carries the beam indication information and is used for indicating the terminal to determine a target SSB for sending and/or receiving data according to the quality detection information, so that the reselection of a beam according to the detected beam quality of the SSB in the random access process is realized, and the success rate of the random access process is improved.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.

Drawings

The drawings are included to provide a better understanding of the present application and are not to be construed as limiting the application. Wherein:

fig. 1 is a schematic flow chart of a random access method according to an embodiment of the present application;

fig. 2 is a schematic flow chart of another random access method according to an embodiment of the present application;

fig. 3 is a schematic diagram of an SSB sequence available to a base station according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating a configuration of SSB associated SSB according to an embodiment of the present application;

FIG. 5 is a schematic diagram of SSB subdivision according to an embodiment of the present application

Fig. 6 is a schematic diagram corresponding to SSB-associated CSI-RS provided in the present application;

fig. 7 is a flow chart of another random access method according to the present embodiment;

fig. 8 is a flow chart of another random access method according to the present embodiment;

fig. 9 is a flow chart of another random access method according to an embodiment of the present application;

fig. 10 is a flowchart of another random access method according to an embodiment of the present application;

Fig. 11 is a flow chart of another random access method according to an embodiment of the present application;

fig. 12 is a flowchart of another random access method according to an embodiment of the present application;

fig. 13 is a schematic flow chart of a random access interaction method according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a random access device according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a random access device according to an embodiment of the present application.

Detailed Description

In the embodiment of the application, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in embodiments of the present application means two or more, and other adjectives are similar.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The embodiment of the application provides a random access method, a device, a base station, a terminal and a storage medium, which are used for improving the success rate and the performance gain of a random access process.

Fig. 1 is a flow chart of a random access method provided in an embodiment of the present application, where the method is used for a base station, and as shown in fig. 1, the method includes the following steps:

step 101, receiving a random access request sent by a terminal.

In an embodiment of the present application, the random access request is used to implement a random access procedure, for example, a random access (RandomAccess, RA) procedure in a New Radio (NR) access system with a fifth generation (the Fifth Generation, 5G) of beamforming. The random access procedure is used to achieve radio access to the access network.

The implementation body of the embodiment is a base station, and the base station may include a plurality of cells for providing services for the terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The base station may be configured to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The base station may also coordinate attribute management for the air interface. For example, the base station according to the embodiment of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), or a base station (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), or an evolved base station (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, or a 5G base station (gNB) in a 5G network architecture (next generation system), or a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), or the like. In some network structures, a base station may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Step 102, a random access response is sent to the terminal, wherein the random access response carries measurement indication information for indicating the terminal to detect the beam quality of the synchronous broadcast block SSB.

In the embodiment of the application, a base station sends a random access response to a terminal according to a received random access request sent by the terminal, wherein the random access response carries measurement indication information to indicate the terminal to detect and obtain the beam quality of each synchronous broadcast block (Synchronization Signal Block, SSB) according to the measurement indication information so as to generate detection information of each SSB beam quality, and simultaneously indicates the terminal to send the quality detection information to the base station.

Step 103, receiving a radio resource control RRC connection request sent by the terminal, where the RRC connection request carries quality detection information, and the quality detection information is obtained by performing quality detection by the terminal according to measurement instruction information.

In the embodiment of the application, the base station receives a radio resource control (Radio Resource Control, RRC) connection request sent by the terminal, the connection request carries quality detection information obtained by quality detection of the beams of each SSB by the terminal, and further, the base station determines a target SSB for sending and/or receiving data by the terminal from a plurality of SSBs according to the beam quality of each synchronous broadcast block SSB indicated in the quality detection information, thereby, the target SSB for sending and/or receiving the data by the terminal is redetermined according to the quality detection information containing the beam quality condition of each SSB acquired by the terminal, and because each SSB is provided with a corresponding beam, when the target SSB for sending and/or receiving the data by the terminal is redetermined, the corresponding beam is changed, namely, the reselection of the beam is realized, rather than the data propagation by adopting a fixed beam in the whole random access process, and the success rate of the random access process is improved.

Step 104, a first RRC connection response is sent to the terminal, where the first RRC connection response carries beam indication information, and is used to instruct the terminal to determine, according to the quality detection information, a target SSB for sending and/or receiving data.

The target SSB is a SSB with higher quality determined according to the quality detection information. In one embodiment of the present application, the target SSB is configured to receive data on the downlink shared channel PDSCH and/or transmit data on the uplink shared channel PUSCH by the terminal.

In this embodiment, in different scenarios, information carried in RRC sent by a base station to a terminal is different, in this embodiment, an RRC connection response carrying beam indication information is referred to as a first connection response, and an RRC connection response not carrying beam indication information is referred to as a second connection response, where the second connection response will be specifically described in a subsequent embodiment, and will not be described herein.

In the embodiment of the application, the base station sends the first RRC connection response to the terminal, wherein the first RRC connection response carries the beam indication information for indicating the target SSB for sending and/or receiving the data according to the quality detection information, so that the terminal performs data transmission according to the beam corresponding to the target SSB, and the success rate of the random access process is improved.

In the random access method of the embodiment of the application, a random access request sent by a terminal is received, a random access response is sent to the terminal, wherein the random access response carries measurement indication information and is used for indicating the terminal to detect the beam quality of a synchronous broadcast block SSB, a radio resource control RRC connection request sent by the terminal is received, the RRC connection request carries quality detection information, the quality detection information is obtained by the terminal detecting the beam quality according to the measurement indication information, and a first RRC connection response is sent to the terminal, wherein the first RRC connection response carries the beam indication information and is used for indicating the terminal to determine a target SSB for sending and/or receiving data according to the quality detection information.

Based on the above embodiment, when the beam quality of the SSB currently used by the base station is poor, the beam needs to be switched, that is, the SSB needs to be reselected, so in order to perform SSB selection, in the present application, an associated SSB is set for each SSB, and since the corresponding beam directions between the associated SSBs may be similar, the reliability of beam switching is improved. For this purpose, the present embodiment provides a flow chart of another random access method, as shown in fig. 2, and step 101 includes the following steps:

In step 201, a system information block SIB message is broadcasted to a terminal, where the SIB message carries an association relationship between SSBs.

The system message block (System Information Block, SIB) message carries an association relationship between SSBs, where the association relationship is used to determine a candidate SSB for quality detection, and the candidate SSB includes a first SSB used by a terminal to send a random access request, and a second SSB having an association relationship with the first SSB. The number of the second SSBs having an association relationship with the first SSB may be one or more, which is not limited in this embodiment.

In the embodiment of the application, the base station broadcasts the system information block SIB message to the terminal, and the SIB message configured by the base station carries the association information among the SSBs, and the corresponding beam directions among the associated SSBs are similar, so that the SSBs can be conveniently reselected among the associated SSBs. Meanwhile, in order to reduce the number of candidate SSBs for quality detection of the terminal, so as to reduce the detection quantity of the terminal, a first SSB adopted by the terminal for sending the random access request and a second SSB with an association relation with the first SSB are used as the candidate SSBs, so that the terminal detects the beam quality of the first SSB and the second SSB with the association relation with the first SSB according to measurement indication information carried by the received random access response, the data quantity of the terminal for quality detection is greatly reduced, and the detection efficiency is improved.

It should be understood that SSBs are synchronous broadcasting blocks of a base station for broadcasting data, each SSB has a corresponding beam, and beams of a base station corresponding to each SSB and beams of a terminal have a correspondence, that is, the SSBs of the base station are determined, so that the corresponding beams for transmitting and/or receiving data can be determined.

In this embodiment, the base station configures SSBs with association relationships for each SSB, which may be determined by the following possible implementation manners:

in one possible implementation manner of the embodiment of the present application, the association relationship includes: and (3) associating the list.

The association list comprises indexes of the first SSB and indexes of the second SSB with association relation. Wherein the index of the SSB is used to identify the SSB.

For example, the base station is configured with 64 actually transmitted SSBs, each configured with 2 associated SSBs, and table 1-1 is a schematic diagram of an association list.

TABLE 1-1

For example, if the index of the first SSB to which the terminal transmits the random access request is 1, the indexes of the corresponding second SSBs having association relations are 0 and 2.

Note that, in table 1, the number of SSBs having association relationships configured by each SSB is the same, and in an actual application scenario, the base station may also configure different numbers of SSBs having association relationships for each SSB, which is not limited in this embodiment.

In another possible implementation manner of the embodiment of the present application, the association relationship includes: and (5) associating strategies.

The association strategy comprises a number threshold value, wherein the number threshold value is used for determining a first SSB and a second SSB with association relation in an available SSB sequence of the base station, and the number of continuous or discontinuous available SSBs between the second SSB and the first SSB is smaller than or equal to the number threshold value. Wherein the number threshold comprises a number threshold along the positive and/or negative order of the available SSB sequences.

In the embodiment of the present application, in the SSB sequences available to the base station, each SSB may be available, or a portion of SSBs may be unavailable, which is specifically described below for different scenarios.

In one scenario of the present application, SSBs contained in the SSB sequence of the base station are all available, and the second SSB having an association relationship is determined for each first SSB by 3 possible implementations for the association policy.

In one possible implementation of an embodiment of the present application, the number threshold is a number threshold along the positive order of the available SSB sequences.

For example, the SSB sequences available to the base station are { SSB0, SSB1, SSB2, … SSBn }, fig. 3 is a schematic diagram of an SSB sequence available to the base station according to the embodiment of the present application, as shown in fig. 3, for example, the number of SSBs available to the base station is 64, the sequence is regarded as a clockwise cyclic sequence, a threshold value of the number along the positive sequence of the available SSB sequences is configured, for example, 2, and the first SSB used by the current terminal to send a random access request is SSB1, and the second SSB having an association relationship with SSB1 is SSB2 and SSB3.

In a second possible implementation of the embodiment of the present application, the number threshold is a number threshold in reverse order along the available SSB sequence.

For example, the SSB sequences available to the base station are { SSB0, SSB1, SSB2, … SSBn }, as shown in fig. 3, for example, the number of SSBs available to the base station is 64, the sequences are regarded as a clockwise cyclic sequence, the number threshold along the positive sequence of the available SSB sequences is configured to be 1, for example, the first SSB used by the current terminal to send the random access request is SSB2, and the second SSB associated with SSB2 is SSB1.

In a third possible implementation of an embodiment of the present application, the number threshold comprises a number threshold along the positive and negative order of the available SSB sequences.

For example, the SSB sequence available to the base station is { SSB0, SSB1, SSB2, … SSBn }, as shown in fig. 3, for example, the number of SSBs available to the base station is 64, the sequence is regarded as a clockwise cyclic sequence, a number threshold along the positive sequence of the available SSB sequence is configured to be 1, for example, and a number threshold along the negative sequence of the available SSB sequence is configured to be 2, for example, the first SSB used by the current terminal to transmit the random access request is SSB1, and the second SSBs associated with SSB1 are SSB0, SSB2, and SSB3.

In one scenario of the present application, not every SSB in the SSB sequence available to the base station is actually available, that is, not every SSB is an SSB that is effectively available for transmitting broadcast data, and therefore, it is required, as a possible implementation, to determine the second SSB that has an association with the first SSB by means of grouping identifiers of SSBs, based on the number and location of SSBs actually transmitted by the cell broadcast by the base station in the SBI.

For example, as shown in fig. 4, the number of SSBs available to the base station is 64, and the 64 SSBs are divided into 8 groups of 8 SSBs each, that is, the location of each SSB is indicated by the group. In the application, an 8-bit character string is used for indicating whether each group of SSBs is transmitted or not, and an 8-bit character string is used for indicating whether each group of SSBs is transmitted or not, wherein 0 in the character string represents non-transmission, and 1 represents transmission.

For example, the strings corresponding to 8 SSBs are: 11111111, i.e. 8 SSBs are sent; the character strings corresponding to each group of SSB are as follows: 11101111, i.e. a group of SSBs, wherein SSB3 does not transmit, i.e. SSB3 does not act as a second SSB having an association with the first SSB, in the second SSB determining that an association with the first SSB exists.

In this embodiment, taking group 1 as an example, the index of 8 SSBs in group 1 is: [ SSB0, SSB1, SSB2, SSB3, SSB4, SSB5, SSB6, SSB7], wherein SSB3 is an unusable SSB.

As a possible implementation manner, based on the association policy, the number threshold includes a number threshold along the positive sequence and the negative sequence of the available SSB sequence, for example, the number threshold along the positive sequence of the available SSB sequence is 1, the number threshold along the negative sequence of the available SSB sequence is 2, and if the first SSB employed by the terminal to send the random access request is SSB1, the determined second SSB associated with SSB1 is SSB0, SSB2, and SSB4.

As another possible implementation manner, based on the association policy, the number threshold includes a number threshold along the positive sequence of the available SSB sequence, for example, the number threshold along the positive sequence of the available SSB sequence is 2, and if the first SSB employed by the terminal to transmit the random access request is SSB1, the determined second SSB associated with SSB1 is SSB2 and SSB4. As yet another possible implementation, based on the association policy, the number threshold includes a number threshold in reverse order of the available SSB sequence, for example, the number threshold in reverse order of the available SSB sequence is 2, and if the first SSB employed by the terminal to transmit the random access request is SSB4, the determined second SSB associated with SSB4 is SSB1 and SSB2.

It should be noted that, when SSBs having association relationships are determined, the SSBs may be determined together according to the association policy and the association relationships, and the principle is the same, which is not described in detail in this embodiment.

In the random access method of the embodiment, a system information block SIB message broadcasted by a base station is received, the SIB message carries an association relation between SSBs, and candidate SSBs are determined according to the association relation, so that when a terminal detects the quality of a synchronous broadcast block SSB according to measurement indication information, quality detection can be performed on the candidate SSBs, wherein the candidate SSBs include a first SSB adopted by the terminal to send a random access request, and a second SSB having an association relation with the first SSB, and the number of SSBs for quality detection is reduced because quality detection is not performed on all SSBs.

In practical application, when the base station and the terminal interact at high frequency, the used frequency spectrum can be a licensed frequency spectrum or an unlicensed frequency spectrum, if the licensed frequency spectrum is used, idle confirmation of a channel is not needed, and if the licensed frequency spectrum is used, namely a shared frequency spectrum, a monitoring avoidance mechanism (Listen Before Talk, LBT) is needed, namely idle confirmation of the channel is needed.

Based on the above embodiments, fig. 7 is a flow chart of another random access method provided in this embodiment, which corresponds to a high-band licensed spectrum scenario, and idle confirmation of a channel is not required. As shown in fig. 7, the method comprises the steps of:

in step 601, a system information block SIB message is broadcasted to a terminal, where the SIB message carries an association relationship between SSBs and reference signal configuration information.

In this embodiment, the association relationship between SSBs is used to determine a candidate SSB for quality detection, where the candidate SSB includes a first SSB used by a terminal to send the random access request, and a second SSB having an association relationship with the first SSB. The SIB message also carries reference signal configuration information for indicating the channel state information reference signal (CSI-RS) associated with each SSB.

In step 601, the association relationship between SSBs carried in SIB messages may refer to the explanation in the embodiment of fig. 2, and the principle is the same, which is not repeated here.

In this embodiment, the SIB message carries an association relationship between SSBs, and at the same time, the SIB message also carries reference signal configuration information for indicating a CSI-RS (Channel-state information RS) associated with each SSB, where the purpose of the CSI-RS is to evaluate a Channel state to achieve beam refinement, that is, associate a beam with the CSI-RS, so as to achieve fine division of the beam, so as to improve a success rate of a random access procedure. The base station configures the associated channel state information reference information for each SSB, which can be implemented by the following two possible implementation manners:

In a possible implementation manner of the embodiment of the present application, the base station configures reference signal configuration information for each SSB, where the reference signal configuration information includes a CSI-RS set, and the CSI set includes CSI-RS associated with a corresponding SSB, where the number of CSI-RS associated with the corresponding SSB may be the same or different, and the embodiment is not limited. As shown in tables 1-2 below.

TABLE 1-2

For example, a beam corresponding to the first SSB used by the terminal to send the random access request is beam 1, an index of a corresponding synchronization broadcast block SSB is SSB1, and CSI-RS associated with SSB1 is { CSI-RS3, CSI-RS4}, that is, CSI-RS3 and CSI-RS4 are indicated by numbers 1 and 2 in fig. 5.

In another possible implementation manner of the embodiment of the present application, a base station configures one CSI-RS set, where each CSI-RS in the CSI-RS set has a corresponding index value. The total number of the CSI-RSs associated with the single SSB is configured to be N, and the index value of the CSI-RSs associated with the corresponding SSB is determined based on the index value. Wherein, the index value of the CSI-RS associated with the SSB with the index value of M is larger than or equal to (N multiplied by M) and smaller than or equal to (N multiplied by M+N-1), and N and M are natural numbers.

For example, fig. 6 is a schematic diagram corresponding to each SSB-associated CSI-RS, as shown in fig. 6, for example, a beam corresponding to a first SSB used by a terminal to send a random access request is beam 1, an index of a corresponding synchronization broadcast block is SSB1, and a total number of SSB 1-associated CSI-RS is n=3, where the associated CSI-RS is calculated as { CSI-RS3, CSI-RS4, CSI-RS5} according to the formula { n×m, …, n×m+n-1 }.

In the random access method of the embodiment, the base station configures the channel state information reference signals associated with each SSB, and as each SSB has a corresponding wave beam, the refinement processing of the wave beam corresponding to the SSB is realized, so that the success rate of the random access method is improved.

Step 602, receiving a random access request sent by a terminal.

Specifically, step 602 may refer to step 101 in the embodiment of fig. 1, and the principle is the same, which is not described herein again.

Step 603, sending a random access response to the terminal, where the random access response carries measurement indication information, and is used to instruct the terminal to detect the beam quality of the synchronous broadcast block SSB and the beam quality of the CSI-RS associated with the candidate SSB.

In the embodiment of the application, when the base station sends a random access response to the terminal, measurement instruction information carried by the random access response is carried by reserved bits in downlink control information (Downlink Control Information, DCI) so as to instruct the terminal to measure quality information. For example, the reserved bit in DCI 1_0 indicates that the terminal needs to measure the reported quality detection information.

In tables 1-3, there is shown a measurement indication information generated using reserved 3 bits in DCI, see in particular tables 1-3 below. And using a plurality of bits in the reserved bits in the DCI to instruct the terminal to measure and report different reference signals to the base station. For example, the plurality of bits may take the highest N bits or the lowest N bits of the reserved bits.

For example, information that the terminal needs to measure is indicated by 8 combinations using the highest 3 bits of the reserved bits according to the following table.

Tables 1 to 3

For example, the value of 3 reserved bits in the downlink control information DCI 1_0 is 110, and the base station instructs the terminal to report the current SSB and its associated SSB, and the quality ranking of CSI-RS having an association relationship with the current SSB.

It should be noted that the measured values in tables 1-3 refer to quality values measured by the terminal, such as the reference signal received power value RSRP, or other measured values that may be used to indicate quality conditions, which are not limited in this embodiment.

It should be understood that, in an actual application scenario, the measurement indication information sent by the base station to the terminal may occupy more bits, so that the quality detection information indicating the measurement of the terminal may include a plurality of the tables 1-3, for example, include the current SSB and the measurement value of the CSI-RS and the quality ordering of the current SSB and the associated SSB, CSI-RS, which is not limited in this embodiment.

The quality detection information reported to the base station by the terminal may be quality detection information measured before the base station transmits the measurement instruction information to the terminal, quality detection information after the measurement instruction information is transmitted to the terminal, or a combination of both, which is not limited in this embodiment.

In step 604, a radio resource control RRC connection request sent by the terminal is received, where the RRC connection request carries quality detection information, and the quality detection information is obtained by performing beam quality detection by the terminal according to measurement instruction information.

Wherein the quality detection information includes: one or more of an index value of the best quality SSB, a reference signal received power value (Reference Signal Receiving Power, RSRP) of each candidate SSB, an RSRP of each candidate SSB-associated CSI-RS, a quality rank of each candidate SSB, and a quality rank of each candidate SSB-associated CSI-RS.

In the embodiment of the application, the quality detection information is obtained by performing quality detection according to the indication of the measurement indication information, the measurement indication information can indicate the terminal to perform quality detection to obtain one or more of the quality detection information, and the quality detection information can be flexibly set according to the requirements of actual application scenes, and the embodiment is not limited.

Step 605, a first RRC connection response is sent to the terminal, where the first RRC connection response carries beam indication information, and is used to instruct the terminal to determine, according to quality detection information, a target SSB for sending and/or receiving data.

In this embodiment, the target SSB is configured to receive data on the downlink shared channel PDSCH and/or transmit data on the uplink shared channel PUSCH by the terminal.

Wherein, beam indication information includes: the method comprises the steps of determining strategy indication information of a target SSB, determining strategy indication information of the target CSI-RS from target SSB associated CSI-RS, and combining one or more of index values of the target CSI-RS and index values of the target SSB.

In one scenario, if the target SSB does not have an associated CSI-RS, the beam indication information includes: the policy indication information for determining the target SSB and the index value of the target SSB, that is, the terminal determines the target SSB from the first SSB and the associated second SSB according to the beam indication information, and the index value of the target SSB.

In another scenario, if the target SSB has an associated CSI-RS, the beam indication information includes determination policy indication information for determining the target CSI-RS from the target SSB associated CSI-RS, and an index value of the target CSI-RS.

In the embodiment of the present application, the beam indication information is carried in a downlink allocation index field in downlink control information DCI. Because the downlink allocation index field in the DCI belongs to the reserved field in the DCI, the downlink allocation index field in the DCI is used for bearing the beam indication information, so that the increase of information bits in the DCI can be avoided, the original DCI size is kept, and the data quantity is reduced.

In one scenario, the beam indication information may be indicated by using 1 bit in the downlink allocation index field in DCI, for example, when the base station indicates that the terminal uses the current beam corresponding to the SSB to transmit and receive, or when the beam corresponding to the SSB with the best quality does not have the beam corresponding to the CSI-RS with the association relationship, the beam indication information is indicated by using 1 bit.

In another scenario, the beam indication information may be indicated by using 2 bits in the downlink allocation index field in the DCI, for example, when the base station sends the first RRC connection response, the SSB used has an associated CSI-RS, and indicates the terminal to receive the beam indication information on the beam corresponding to the associated CSI-RS.

In the actual scenario, more bits may be used to indicate the beam indication information, which is not limited in this embodiment.

In the random access method of the embodiment of the application, in the authorized frequency spectrum of the high frequency band, on the basis of introducing beam switching and beam refinement in the random access process, the base station transmits the random access response carrying the measurement indication information to the terminal so as to report the quality information of the corresponding SSB beam, thereby the terminal and the base station timely adjust the target SSB of the terminal for transmitting and/or receiving data according to the quality measurement result, and the success probability of random access is improved through the switching of the target SSB under the condition that the channel is easy to be interfered.

Based on the above embodiment, in the random access process of the unlicensed spectrum, since the channel on the unlicensed spectrum is a shared channel, the availability of the channel cannot be guaranteed at any time, so that a listening avoidance mechanism LBT is required, and the LBT is a channel access mechanism, so that the same spectrum resources can be effectively shared between wireless local area networks. LBT requires that the channel be monitored before transmitting data, clear channel assessment be performed, and data transmission be performed again under the condition that the channel is clear, so as to improve the success probability of data transmission. To this end, the present application provides a flow chart of a random access method, as shown in fig. 8, which includes the following steps:

in step 701, a system information block SIB message is broadcasted to a terminal, where the SIB message carries an association relationship between SSBs and reference signal configuration information.

Step 702, a random access request sent by a terminal is received.

Step 703, sending a random access response to the terminal, where the random access response carries measurement indication information, and is used to instruct the terminal to detect the beam quality of the synchronous broadcast block SSB and the beam quality of the CSI-RS associated with the candidate SSB.

Specifically, the steps 701 to 703 may refer to the explanation in the above embodiments, and the principles are the same, which is not repeated here.

In step 704, the beam corresponding to the first SSB and the beam corresponding to the second SSB are monitored to receive the RRC connection request.

In an unlicensed spectrum scenario, when a base station receives an RRC connection request sent by a terminal, since the terminal has performed detection of monitoring avoidance for a first SSB and an associated second SSB, and determines an SSB that is successfully monitored and avoided from the first SSB and the second SSB, that is, determines an SSB in an idle state, to be used for sending the RRC connection request, the base station needs to monitor a beam corresponding to the first SSB and a beam corresponding to the second SSB, so that the success rate of receiving the RRC connection request is improved by receiving the RRC connection request.

Step 705, according to the quality detection information, eliminating SSBs corresponding to the beam with failed listening avoidance and SSBs with quality lower than a set quality threshold from the first SSB and the second SSB, so as to obtain reserved SSBs.

The quality detection information is further used for indicating the SSB corresponding to the beam with the failure of monitoring avoidance when the terminal sends the RRC connection request, that is, the quality detection information includes quality detection information of the beam corresponding to the first SSB and the second SSB, and SSBs corresponding to the beam with the failure of monitoring avoidance in the first SSB and the second SSB.

In this embodiment, the base station excludes SSBs corresponding to the beam with failed listening avoidance and SSBs with quality lower than a set quality threshold from the first SSB and the second SSB according to quality detection information obtained from the terminal, so as to obtain reserved SSBs in the terminal, so as to improve quality of the reserved SSBs in the terminal.

In step 706, according to the reserved SSB, the corresponding beam is monitored to determine a beam for which the monitoring avoidance is successful.

In this embodiment, at the base station side, the base station monitors, according to the reserved SSB, a beam corresponding to the reserved SSB, so as to determine the SSB corresponding to the beam where the base station side monitors that the avoidance is successful, that is, determine the SSB that the base station side can be used to perform RRC connection response transmission.

In step 707, if the SSB corresponding to the beam for which the listening avoidance is successful is the same as the SSB corresponding to the beam for receiving the random access request, a first RRC connection response is sent.

In the embodiment of the present application, the connection response sent by the device includes two types, which are called a first RRC connection response and a second RRC connection response for convenience of distinction, where the first RRC connection response includes beam indication information, and the second RRC connection response does not include beam indication information.

In this embodiment, if the base station prepares to send an RRC connection response, the SSB corresponding to the beam that is monitored to avoid success is the same as the SSB corresponding to the beam that is used to receive the random access request sent by the terminal, that is, the SSB corresponding to the beam that is used to send data at the base station end has no change, and if the SSB that is monitored to avoid success has an associated CSI-RS, an RRC connection response that carries beam indication information is sent, so that the terminal switches to the beam corresponding to the CSI-RS, and beam switching is achieved.

For example, the base station end monitors SSB corresponding to the beam with successful avoidance, for example, SS1, and receives SSB corresponding to the beam of the random access request sent by the terminal, and also SSB1, and in this case, sends an RRC connection response carrying beam indication information, so that the terminal switches to CSI-RS with corresponding quality meeting the preset requirement.

Step 708, if the SSB corresponding to the beam with successful monitoring and avoidance is different from the SSB for receiving the random access request, a second RRC connection response is sent, where the second RRC connection response does not carry beam indication information

In the embodiment of the application, if the SSB corresponding to the beam with successful monitoring avoidance is different from the SSB for receiving the random access request, the base station needs to switch the SSB to the SSB corresponding to the beam with successful monitoring avoidance currently, and the terminal does not need to be instructed to switch the SSB, so that a second connection response which does not carry beam indication information is sent.

For example, the base station end monitors SSB corresponding to the beam with successful avoidance, for example, SS2, and receives SSB corresponding to the beam with the random access request sent by the terminal, for example, SSB1, that is, SSB2 is different from SSB1, which indicates that the base station needs to switch the beam, the base station directly switches to SSB2 corresponding to the beam with successful avoidance, and sends a second RRC connection response on SSB 2.

In the random access method of the embodiment of the application, in the random access process of the unlicensed spectrum, based on beam switching, beam refinement and beam quality measurement reporting operation, monitoring avoidance is carried out on a plurality of beams so as to determine SSB corresponding to the beams with successful monitoring avoidance, if the SSB with successful monitoring avoidance changes, the SSB is switched to the SSB with successful monitoring avoidance, thereby enhancing the robustness and success rate of the channel transmission of the unlicensed spectrum.

Based on the above embodiment, after the random access response is sent to the terminal, the base station does not receive the RRC connection request sent by the terminal within the preset time, then the retransmission indication of the RRC connection request may be sent to the terminal, and the retransmission indication is provided with measurement indication information, so that the terminal performs quality detection according to the measurement indication information carried in the retransmission indication to obtain corresponding quality detection information and uploads the corresponding quality detection information to the base station, thereby improving the success rate of the random access process.

In order to implement the foregoing embodiments, the embodiments of the present application provide a random access method, which is used for a terminal, and fig. 9 is a schematic flow chart of another random access method provided in the embodiments of the present application.

As shown in fig. 9, the method comprises the steps of:

Step 901, a random access request is sent to a base station.

The execution body of the embodiment is a terminal, which may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem, and so on. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and embodiments of the present application are not limited in this respect.

Step 902, receiving measurement instruction information sent by a base station.

In this embodiment, the terminal detects the beam quality of the synchronous broadcast block SSB according to the measurement instruction information, and obtains quality detection information.

In one possible implementation manner of the embodiment of the present application, the terminal receives a random access response sent by the base station, where the random access response carries measurement indication information, so that the terminal detects quality of a beam corresponding to the synchronous broadcast block SSB according to the measurement indication information, and obtains quality detection information.

In another possible implementation manner of the embodiment of the present application, a retransmission indication of an RRC connection request sent by a base station is received, where the retransmission indication carries measurement indication information. After the base station sends the random access response to the terminal, the base station does not receive the RRC connection request sent by the terminal within the preset time, and can send retransmission indication of the RRC connection request to the terminal, and measurement indication information is carried in the retransmission indication, so that the terminal can acquire the measurement indication information carried in the retransmission indication, the situation that the terminal does not receive the measurement indication information is avoided, the terminal performs quality detection according to the measurement indication information to obtain corresponding quality detection information, and the base station is uploaded, and the success rate of the random access process is improved.

In step 903, a radio resource control RRC connection request is sent to the base station, where the RRC connection request carries quality detection information, where the quality detection information is obtained by the terminal detecting beam quality of the synchronization broadcast block SSB according to measurement indication information.

In the embodiment of the application, a terminal sends a Radio Resource Control (RRC) connection request to a base station, wherein the connection request carries quality detection information obtained by the terminal for carrying out quality detection on beams of each SSB, so that the base station determines a target SSB for carrying out data transmission by the terminal from a plurality of SSBs of the terminal according to the quality detection information, and the SSB for carrying out data transmission by the terminal is redetermined according to the quality detection information containing the beam quality condition of each SSB acquired from the terminal.

Step 904, receiving an RRC connection response sent by the base station, where the RRC connection response carries beam indication information, and is used to instruct the terminal to determine the target SSB according to the quality detection information.

The target SSB is SSB with higher quality determined by the terminal according to the quality detection information.

In the embodiment of the application, the terminal receives the RRC connection response sent by the base station, wherein the RRC connection response carries the beam indication information for indicating the target SSB for sending and/or receiving data by the terminal according to the quality detection information, so that the terminal performs data transmission according to the beam corresponding to the target SSB, and the success rate of the random access process is improved.

In step 905, data is transmitted and/or received using the target SSB.

In one embodiment of the present application, the target SSB is configured to receive data on the downlink shared channel PDSCH and/or transmit data on the uplink shared channel PUSCH by the terminal.

In the random access method of the embodiment of the application, in the random access process, the terminal sends a random access request to the base station, and then the terminal receives measurement indication information sent by the base station, the terminal detects the beam quality of the synchronous broadcast block SSB according to the measurement indication information, and when the terminal sends an RRC connection request to the base station, the beam quality detection information carrying the SSB is reported to the base station, so that the base station determines a target SSB for data transmission of the terminal according to the quality detection information, and sends the beam indication information to the terminal to indicate the determined target SSB, thereby realizing the re-determination of the SSB in the random access process, realizing the re-selection of the beam based on the beam corresponding to the re-determined SSB, and improving the success rate of the random access process.

Based on the above embodiment, when the beam quality of the SSB currently used by the base station is poor, the beam needs to be switched, that is, the SSB needs to be reselected, so in order to perform SSB selection, in the present application, an associated SSB is set for each SSB, and since the corresponding beam directions between the associated SSBs may be similar, the reliability of beam switching is improved. For this purpose, the present embodiment provides a flowchart of yet another random access method, as shown in fig. 10, and the step 901 includes the following steps:

in step 1001, a system information block SIB message broadcasted by a base station is received, where the SIB message carries an association relationship between SSBs.

The SIB message carries an association relation between SSBs, wherein the association relation is used for determining candidate SSBs for quality detection, and the candidate SSBs comprise a first SSB adopted by a terminal for sending a random access request and a second SSB with the association relation with the first SSB. The number of the second SSBs having an association relationship with the first SSB may be one or more, which is not limited in this embodiment.

In the embodiment of the application, the terminal receives the system information block SIB message broadcast by the base station, the SIB message configured by the base station carries the associated information of each SSB, the corresponding beam directions among the associated SSBs are similar, so that the SSB can be conveniently reselected among the associated SSBs, and the accuracy of SSB reselection is improved. Meanwhile, in order to reduce the number of candidate SSBs for quality detection of the terminal, so as to reduce the detection quantity of the terminal, a first SSB adopted by the terminal for sending the random access request and a second SSB with an association relation with the first SSB are used as the candidate SSBs, so that the terminal detects the beam quality of the first SSB and the second SSB with the association relation with the first SSB according to measurement indication information carried by the received random access response, the data quantity of the terminal for quality detection is greatly reduced, and the detection efficiency is improved.

It should be understood that SSBs are synchronous broadcasting blocks of a base station for broadcasting data, each SSB has a corresponding beam, and beams of a base station corresponding to each SSB and beams of a terminal have a correspondence, that is, the SSBs of the base station are determined, so that the beams of the terminal for transmitting and/or receiving data can be determined.

Wherein, the base station configures the SSBs with association relations for each SSB, which is determined by the following possible implementation manners:

For example, the base station is configured with 64 actually transmitted SSBs, each configured with 2 associated SSBs, and table 2-1 is a schematic diagram of the association list.

Index of SSB	Index of associated SSBs
		0	63,1
1	0,2
		2	1，3
3	2，5
		……	……
63	62,1

TABLE 2-1

For example, if the index of the first SSB where the terminal sends the random access request to the base station is 1, the index of the corresponding second SSB having the association relationship is 0 and 2.

Note that, in table 2-1, the number of SSBs having association relationships configured by each SSB is the same, and in the actual application scenario, the base station may also configure different numbers of SSBs having association relationships for each SSB, which is not limited in this embodiment.

The association strategy comprises a number threshold value, wherein the number threshold value is used for determining a first SSB and a second SSB with association relation in an available SSB sequence of the base station, and the number of continuous or discontinuous available SSBs between the second SSB and the first SSB is smaller than or equal to the number threshold value. Wherein the number threshold comprises a number threshold along the positive and/or negative order of the available SSB sequences. In the embodiment of the present application, in the SSB sequences available to the base station, each SSB may be available, or a portion of SSBs may be unavailable, which is specifically described below for different scenarios.

It should be noted that, corresponding strings may be set for each group, and the strings set for each group may also be different to indicate the SSB sending situation in each group, thereby implementing personalized setting.

As another possible implementation manner, based on the association policy, the number threshold includes a number threshold along the positive sequence of the available SSB sequence, for example, the number threshold along the positive sequence of the available SSB sequence is 2, and if the first SSB employed by the terminal to transmit the random access request is SSB1, the determined second SSB associated with SSB1 is SSB2 and SSB4.

As yet another possible implementation, based on the association policy, the number threshold includes a number threshold in reverse order of the available SSB sequence, for example, the number threshold in reverse order of the available SSB sequence is 2, and if the first SSB employed by the terminal to transmit the random access request is SSB4, the determined second SSB associated with SSB4 is SSB1 and SSB2.

In practical application, when the base station and the terminal interact with each other at high frequency, the used frequency spectrum can be a licensed frequency spectrum or an unlicensed frequency spectrum, if the used frequency spectrum is the licensed frequency spectrum, idle confirmation of a channel is not needed, and if the used frequency spectrum is the unlicensed frequency spectrum, namely the shared frequency spectrum, a monitoring avoidance mechanism LBT is needed, namely the idle confirmation of the channel is needed. The following description is directed to different scenarios.

Based on the above embodiments, the present embodiment provides a flow chart of another random access method, which corresponds to a high-band licensed spectrum scenario, and does not need to perform idle acknowledgement of a channel. As shown in fig. 11, the method comprises the steps of:

in step 1101, a system information block SIB message broadcasted by a base station is received, where the SIB message carries an association relationship between SSBs and reference signal configuration information.

In step 1101, the association relationship between SSBs carried in SIB messages may be the same as that explained in the corresponding embodiment of fig. 10, and will not be repeated here.

In a possible implementation manner of the embodiment of the present application, the base station configures reference signal configuration information for each SSB, where the reference signal configuration information includes a CSI-RS set, and the CSI set includes CSI-RS associated with a corresponding SSB, where the number of CSI-RS associated with the corresponding SSB may be the same or different, and the embodiment is not limited. As shown in table 2-2 below.

TABLE 2-2

In this embodiment, the base station configures the channel state information reference signals associated with each SSB, and since each SSB has a corresponding beam, the refinement processing of the beam corresponding to the SSB is achieved, so as to improve the success rate of the random access method.

Step 1102, a random access request is sent to a base station.

Specifically, referring to step 901 in the corresponding embodiment of fig. 9, the principles are the same, and will not be repeated here.

In step 1103, measurement instruction information sent by the base station is received.

In the embodiment of the application, the terminal receives measurement instruction information sent by the base station, wherein the measurement instruction information is carried on reserved bits in downlink control information DCI so as to instruct the terminal to measure quality information. For example, the reserved bit in DCI 1_0 indicates that the terminal needs to measure reported quality information.

In tables 2-3, there is shown a measurement indication information generated using reserved 3 bits in DCI, see in particular tables 2-3 below. And using a plurality of bits in the reserved bits in the DCI to instruct the terminal to measure and report different reference signals to the base station. For example, the plurality of bits may take the highest N bits or the lowest N bits of the reserved bits, where N is a natural number.

Tables 2 to 3

It should be noted that the measured values in tables 2-3 refer to quality values measured by the terminal, such as the reference signal received power value RSRP, or other measured values that may be used to indicate quality conditions, which are not limited in this embodiment.

It should be understood that, in an actual application scenario, the measurement indication information sent by the base station to the terminal may occupy more bits, so that the quality detection information indicating the measurement of the terminal may include a plurality of the tables 2-3, for example, include the current SSB and the measurement value of the CSI-RS and the quality ordering of the current SSB and the associated SSB, CSI-RS, which is not limited in this embodiment.

In step 1104, a radio resource control RRC connection request is sent to the base station, where the RRC connection request carries quality detection information, where the quality detection information is obtained by detecting, by the terminal, beam quality of the synchronization broadcast block SSB according to the measurement indication information, and detecting beam quality of CSI-RS associated with the candidate SSB.

Wherein the quality detection information includes: one or more of an index value of the SSB with the best quality, a reference signal received power value RSRP of each candidate SSB, an RSRP of each candidate SSB-associated CSI-RS, a quality rank of each candidate SSB, and a quality rank of each candidate SSB-associated CSI-RS.

The quality detection information reported to the base station by the terminal may be a measurement result before the base station transmits the measurement instruction information to the terminal, or may be quality detection information after the measurement instruction information is transmitted to the terminal, or a combination of both, which is not limited in this embodiment.

In step 1105, an RRC connection response sent by the base station is received, where the RRC connection response carries beam indication information, and the beam indication information is used to instruct the terminal to determine the target SSB according to the quality detection information.

Specifically, referring to step 904 in the embodiment of fig. 9, the principles are the same, and will not be described herein.

In step 1106, the target SSB is employed to transmit and/or receive data.

In yet another scenario, if the target SSB has an associated CSI-RS, the beam indication information includes: the method comprises the steps of determining strategy indication information of a target SSB, determining strategy indication information of a target CSI-RS from target SSB associated CSI-RSs, an index value of the target CSI-RS and an index value of the target SSB.

Further, in one scenario, the beam indication information may be indicated by 1 bit, for example, when the base station only instructs the terminal to transmit and receive using the beam corresponding to the SSB, or when the SSB with the best quality does not have the associated CSI-RS, the beam indication information may be indicated by 1 bit.

In another scenario, the beam indication information may be indicated by using 2 bits, for example, when the terminal receives the first RRC connection response sent by the base station, the SSB used has an associated CSI-RS, and indicates the terminal to receive the first RRC connection response on the beam corresponding to the associated CSI-RS.

In the random access method of the embodiment of the application, in the authorized frequency spectrum of the high frequency band, on the basis of introducing beam switching and beam refinement in the random access process, the terminal receives the random access response carrying the measurement instruction information and sent by the base station so as to carry out quality detection on the SSB to generate quality detection information, thereby the terminal and the base station can timely adjust the target SSB of the data transmission of the terminal according to the quality measurement result, and the success probability of random access is improved under the condition that the channel is easy to be interfered.

Based on the above embodiment, in the random access process of the unlicensed spectrum, since the channel on the unlicensed spectrum is a shared channel, the availability of the channel cannot be guaranteed at any time, so a listening avoidance mechanism (Listen Before Talk, LBT) is needed, and LBT is a channel access mechanism, so that the same spectrum resources can be effectively shared between wireless local area networks. LBT requires that the channel be monitored before transmitting data, clear channel assessment be performed, and data transmission be performed again under the condition that the channel is clear, so as to improve the success probability of data transmission. To this end, the present application provides a flow chart of a random access method, as shown in fig. 12, which includes the following steps:

step 1201, a system information block SIB message broadcasted by a base station is received, where the SIB message carries an association relationship between SSBs and reference signal configuration information.

Specifically, the principle is the same and will not be described again herein with reference to the explanation in step 901 in the corresponding embodiment of fig. 9.

Step 1202, a random access request is sent to a base station.

Step 1203, receiving measurement indication information sent by the base station.

Specifically, reference may be made to steps 901-902 in the embodiment of fig. 9, and the principles are the same, and will not be repeated here.

In step 1204, the beam corresponding to the first SSB and the beam corresponding to the second SSB are monitored to determine a beam for which the monitoring avoidance is successful.

In the embodiment of the application, in an unlicensed spectrum scene, when a terminal sends an RRC connection request to a base station, channels corresponding to a first SSB and a second SSB with an association relation are not necessarily in an idle state, so that a beam corresponding to the first SSB and a beam corresponding to the second SSB need to be monitored to determine a beam with successful monitoring avoidance, and the success rate of the terminal for sending the RRC connection request is improved.

In step 1205, the RRC connection request is sent using a beam that monitors for successful back-off.

In one embodiment of the application, after the beam with successful monitoring avoidance is determined, the RRC connection request is sent by using the beam with successful monitoring avoidance, so that the success rate of sending and receiving the RRC connection request by the terminal is improved.

In practical application, the terminal monitors the beams corresponding to each SSB, the number of the beams which are successfully monitored and avoided can be multiple, and when the number of the beams which are successfully monitored and avoided is multiple, the beams which can be reserved are screened from the beams which are successfully monitored and avoided according to quality detection information obtained by the terminal for detecting the quality of the candidate beams. Thus, in one possible implementation of an embodiment of the present application, step 1205 may also be implemented by:

the RRC connection request is transmitted using the reserved beam.

In this embodiment, since the number of the determined beams with successful listening and avoiding is multiple, the beams with successful listening and avoiding are screened according to the quality detection information obtained by detecting the terminal, as an implementation manner, the beams with successful listening and avoiding are screened according to the quality ordering of the beams in the quality detection information, so as to obtain reserved beams, for example, the reserved beams are beams corresponding to SSB with the best quality ordering, thereby improving the success rate of sending the RRC connection request.

In this embodiment, as a possible implementation manner, the quality detection information is sorted in ascending order according to the index of the SSB or the index of the associated CSI-RS to generate quality detection information, where the quality detection information includes the quality sorting of the SSB and/or the associated CSI-RS, and a value meaning schematic diagram of the quality sorting is shown in tables 2-4. When the ranking is larger than 0, the ranking value is smaller, and the beam quality corresponding to the SSB is better.

Tables 2 to 4

In step 1206, the beam corresponding to the first SSB and the beam with successful listening avoidance are listened to receive the RRC connection response sent by the base station.

The RRC connection response carries beam indication information, which is used for indicating the determined target SSB according to the quality detection information.

In the embodiment of the application, after the terminal sends the RRC connection request to the base station, the base station determines the target SSB for data transmission of the terminal according to the quality detection information carried in the RRC connection request, and sends the RRC connection response to the terminal, the base station also needs to detect the beam for monitoring avoidance so as to determine the beam for monitoring avoidance success, and the SSB corresponding to the beam for monitoring avoidance success, which is determined by the base station and can be used for sending the RRC connection response, can be the first SSB or the beam for monitoring avoidance success at the base station end, so that the terminal needs to monitor the beam corresponding to the first SSB and the beam for monitoring avoidance success so as to realize the RRC connection response sent by the receiving station, and the reliability of data issuing is improved.

It should be noted that, regarding the process of determining the beam with successful listening avoidance in the base station, reference may be made to the description in the corresponding embodiment of fig. 7, which is not repeated here.

In step 1207, the target SSB is employed to transmit and/or receive data.

Specifically, referring to step 905 in the embodiment of fig. 9, the principle is the same, and will not be described herein.

In the random access method of the embodiment of the application, in the unlicensed spectrum, on the basis of introducing beam switching and beam refinement in the random access process, a terminal receives a random access response carrying measurement indication information and sent by a base station, so as to perform quality detection on SSB beams to generate quality detection information, and monitor the SSB corresponding beams to determine the beams with successful monitoring avoidance, and the beams with successful monitoring avoidance are adopted for data transmission, thereby enhancing the robustness of unlicensed spectrum channel transmission.

Based on the above embodiment, after the beam corresponding to the first SSB and the beam corresponding to the second SSB are monitored to determine that the beam with successful monitoring avoidance needs to be updated, the following steps are further included after step 1204:

In one scenario, if quality detection information sent by a terminal to a base station does not need to include reference signal receiving power value RSRP of SSB, in the quality detection information, the reference signal receiving power value RSRP corresponding to a beam with failure in monitoring avoidance is deleted, so as to reduce data volume of the quality detection information required to be reported to the base station by the terminal, and improve transmission speed.

In the second scenario, if the quality detection information sent by the terminal to the base station does not need to include quality ordering of SSBs, the quality detection information is implemented by the following two implementation manners:

as an implementation manner, in the quality detection information, the SSB corresponding to the beam with failed listening avoidance is updated to quality order. For example, the quality sequence of SSBs corresponding to the beam with failed listening avoidance is updated to 0, and the quality sequences of SSBs corresponding to other beams without failed listening avoidance are unchanged, so as to improve the accuracy of quality sequence.

As another implementation manner, in the quality detection information, updating quality ranking of SSBs corresponding to the beam with failed listening avoidance, and re-performing quality ranking of SSBs corresponding to the beam with successful listening avoidance, for example, updating quality ranking of SSBs corresponding to the beam with failed listening avoidance to 0, excluding the value of 0, and re-performing quality ranking of SSBs corresponding to the beam with successful listening avoidance, so as to improve accuracy of quality ranking.

In the third scenario, if the quality detection information sent to the base station by the terminal does not need to include the index value of the SSB, the index value of the SSB corresponding to the beam failing to monitor avoidance is deleted in the quality detection information, so as to reduce the data volume of the quality detection information required to be reported to the base station by the terminal and improve the transmission speed.

In order to implement the above embodiment, the present embodiment provides an interaction method for random access, as shown in fig. 13, which includes the following steps:

in step 1301, the base station broadcasts a SIB message.

The SIB message carries association relations among SSBs and reference signal configuration information.

Step 1302, send a random access request to a base station.

Step 1303, a random access response carrying measurement indication information is sent to the terminal.

The measurement indication information carried by the random access response is used for indicating the quality of the SSB wave beam of the detection synchronous broadcast block.

In step 1304, an RRC connection request carrying quality detection information is sent to the base station.

The quality detection information carried in the RRC connection request is obtained by detecting the quality of the SSB according to the measurement indication information.

Step 1305, sending an RRC connection response to the terminal.

In one scenario of this embodiment, if the base station prepares to send an RRC connection response, the base station monitors SSBs corresponding to beams that have been successfully avoided, and SSBs corresponding to beams that are used to receive a random access request sent by the terminal are the same, that is, SSBs corresponding to beams that are used to send data at the base station end are unchanged, if the SSBs that have been successfully avoided are monitored to have associated CSI-RS, an RRC connection response carrying beam indication information is sent, and the terminal is informed of beams corresponding to CSI-RS to which switching is required, so that beam switching is achieved.

For example, the base station end monitors SSB corresponding to the beam with successful avoidance, for example, SS1, and receives SSB corresponding to the beam of the random access request sent by the terminal, and also SSB1, and in this case, sends an RRC connection response carrying beam indication information to inform the terminal of CSI-RS to which handover is required.

In another scenario of this embodiment, if the SSB corresponding to the beam with successful listening and avoiding is different from the SSB used for receiving the random access request, it is indicated that the base station needs to switch the SSB to the SSB corresponding to the beam with successful listening and avoiding currently, and it is not necessary to instruct the terminal to switch the SSB, so that a second connection response that does not carry beam indication information is sent.

In step 1306, the target SSB is employed to transmit and/or receive data.

It should be noted that the explanation of the method embodiment is also applicable to the interaction method of this embodiment, and will not be repeated here.

In an actual scene, when data transmission is performed between a base station and a terminal in a high frequency band, a corresponding frequency spectrum has a licensed frequency spectrum and an unlicensed frequency spectrum, wherein the licensed frequency spectrum can be understood as a dedicated frequency spectrum, and when the licensed frequency spectrum is used, a channel does not need to be monitored and avoided. And the unlicensed spectrum belongs to the shared spectrum, and when the shared spectrum is used for data transmission, the channel needs to be monitored firstly to determine the idle channel, so that channel collision is avoided, and data cannot be transmitted. In order to further clearly explain the random access method of the embodiment, the following describes the interaction flow between the terminal and the base station in the scene of licensed spectrum and unlicensed spectrum.

First: under the authorization scene, based on the association policy, a first SSB and a second SSB with association relation are determined.

The base station configures a broadcast system information block SIB message, wherein the SIB message carries the association relation among SSBs and reference signal configuration information.

Regarding the relevant configuration method of SIB messages to implement the configuration of SSBs associated with SSBs and the configuration method of CSI-RS associated with SSBs to implement beam selection and beam refinement, reference may be made to the explanation in the foregoing embodiments, and details thereof will not be repeated here.

After detecting the random access request sent by the terminal, the base station sends a random access response carrying measurement indication information to the terminal, so that the terminal measures the beam quality of the synchronous broadcast block SSB and the beam quality of the associated CSI-RS according to the measurement indication information to obtain quality detection information.

In this embodiment, the measurement indication information is carried in reserved bits in the downlink control information DCI, for example, the value corresponding to the reserved bits in DCI 1_0 of the downlink control channel PDCCH is 011, see the above table 2-3, and the base station indicates the terminal to report the quality measurement results of the current SSB and its associated SSB and CSI-RS.

Further, the terminal transmits an RRC connection request carrying quality detection information to the base station.

And the terminal reports the quality detection information of the current SSB and the associated SSB and CSI-RS to the base station according to the measurement indication information.

For example, the reported quality detection information includes SSB0, SSB1, SSB2, SSB4 and reference signal received power values RSRP for CSI-RS3, CSI-RS4, CSI-RS5, as shown in tables 3-1 and 3-2 below.

SSB index	RSRP value (dBm)
		0	-117
1	-95
		2	-80
4	-90

TABLE 3-1

CSI-RS index	RSRP value (dBm)
		4	-94
5	-90
		6	-85

TABLE 3-2

Further, the base station transmits a first RRC connection response carrying the beam indication information to the terminal.

In one scenario of this embodiment, if the base station prepares to send an RRC connection response, if the base station sends beam indication information by using the SSB that receives quality detection information sent by the terminal, and if there is an associated CSI-RS in the current SSB, then selecting the beam with the best quality from the CSI-RS that are associated, and sending an RRC connection response that carries the beam indication information, informing the terminal that the beam corresponding to the CSI-RS with the best quality needs to be switched to, so as to implement beam switching based on refined configuration of the previous beam.

In another scenario of this embodiment, when the base station prepares to send an RRC connection response, the base station uses the SSB of the random access request sent by the receiving terminal, and determines, according to the quality detection information, the SSB corresponding to the beam with better quality, where the base station needs to switch the SSB to the SSB corresponding to the currently determined beam with best quality, that is, if the SSB at the base station side changes, a first connection response carrying beam indication information is sent, so as to instruct the terminal to switch the corresponding beam, thereby increasing the success probability of random access under the condition that the channel is easy to be interfered.

For example, the quality detection information reported to the base station by the terminal includes beam quality detection information of SSB0, SSB1, SSB2 and SSB4, where the RSRP value corresponding to SSB2 is the largest, so that the quality of SSB2 is the best, and therefore, according to the beam indication information, the terminal uses SSB2 as the target SSB and uses the received beam corresponding to SSB2 as the target beam, so that the target SSB is switched according to the quality detection information, so as to adjust the beam corresponding to the SSB used by the terminal for data transmission, and increase the success probability of random access under the condition that the channel is easily interfered.

Second,: under the authorization scene, a first SSB and a second SSB with association relation are determined based on the association list.

The terminal sends a random access request to the base station, for example, the terminal sends a beam 1 selected by a signal, corresponding to a synchronous broadcast block SSB1, SSB with association relation with SSB1 is { SSB0, SSB2}, and CSI-RS with association relation with SSB1 is { CSI-RS3, CSI-RS4, CSI-RS5}.

Furthermore, the base station transmits a random access response carrying measurement instruction information to the terminal, so that the terminal measures the beam quality of the synchronous broadcast block SSB and the beam quality of the associated CSI-RS according to the measurement instruction information to obtain quality detection information.

In this embodiment, the measurement indication information is carried in reserved bits in the downlink control information DCI, for example, the value corresponding to the reserved bits in DCI 1_0 of the downlink control channel PDCCH is 110, see the above table 2-3, and the base station indicates the terminal to report the current SSB and its associated quality ranks of SSB and CSI-RS.

And the terminal reports quality detection information containing the current SSB and quality sequences of beams corresponding to the associated SSB and the CSI-RS to the base station according to the measurement indication information.

For example, the quality detection information reported by the terminal includes SSB0, SSB1, SSB2, CSI-RS3, CSI-RS4, and CSI-RS5, which are ranked according to the reference signal measurement results, e.g. table 3-3 and table 3-4, where the smaller the number corresponding to the ranking is, the better the signal quality is indicated.

SSB index	Corresponding beam quality ranking
		0	3
1	1
		2	2

TABLE 3-3

CSI-RS index	Corresponding beam quality ranking
		3	3
4	2
		5	1

Tables 3 to 4

And the base station sends a first RRC connection response carrying the beam indication information to the terminal according to the quality detection information reported by the terminal. The beam indication information is carried in a downlink allocation index field in downlink control information DCI. In this embodiment, the downlink allocation index field in the downlink control information DCI is used to instruct the terminal to receive the reception beam corresponding to the RRC connection response.

Wherein the meaning of beam pointing information in different scenarios is shown in tables 3-5 below, which are examples only and are not limiting of the application.

Tables 3 to 5

For example, the base station sends beam indication information while the beam 1 is still being sent, that is, the beam currently used by the base station is not changed, the base station determines that the quality of the beam 1 is better according to the beam quality detection information reported by the terminal, if the corresponding beam 1 is SSB1, it determines that the SSB1 is the target SSB, and further, since the SSB1 also has the CSI-RS3, CSI-RS4 and CSI-RS5 with association relations, the beam corresponding to the CSI-RS5 with the best quality is used for the terminal to receive the first RRC connection response. According to the quality detection information, the target SSB is switched to adjust the wave beam corresponding to the SSB used for data transmission by the terminal, and the success probability of random access is increased under the condition that a channel is easy to be interfered. Second,: under an unauthorized scene, a first SSB and a second SSB with association relation are determined based on the association list.

The terminal sends a random access request to the base station, for example, the terminal selects beam 1, SSB corresponding to the synchronous broadcast block SSB1 and having an association relationship with SSB1 is { SSB0, SSB2}, and CSI-RS having an association relationship with SSB1 is { CSI-RS3, CSI-RS4, CSI-RS5}.

Further, in an unlicensed scenario, the terminal sends an RRC connection request carrying quality detection information to the base station.

In the unauthorized scenario, the method for the terminal to monitor and avoid each beam may refer to the description in the corresponding embodiment of fig. 12, which is not repeated herein.

Further, quality detection information including quality ranks of the current SSB and its associated SSB and CSI-RS is reported to the base station based on the measurement instruction information.

For example, the quality detection information reported by the terminal includes SSB0, SSB1, SSB2, CSI-RS3, CSI-RS4, and CSI-RS5, which are ranked according to the reference signal measurement results, e.g. table 3-6 and table 3-7, where the smaller the number corresponding to the ranking is, the better the signal quality is indicated.

SSB index	Corresponding beam quality ranking
		0	0
1	1
		2	2

Tables 3 to 6

CSI-RS index	Corresponding beam quality ranking
		3	3
4	2
		5	1

Tables 3 to 7

Further, the base station transmits a first RRC connection response carrying the beam indication information to the terminal. The beam indication information is carried in a downlink allocation index field in downlink control information DCI.

The base station monitors an RRC connection request sent by the terminal on the SSB of the random request and the SSB related to the SSB, eliminates SSB which does not exceed a measurement threshold and fails in LBT in quality report, obtains reserved SSB, monitors and avoids LBT on the reserved SSB and the related CSI-RS, and sends a first RRC connection response on the SSB with successful monitoring and avoidance, wherein the carried beam indication information is carried in a downlink allocation index field in downlink control information DCI.

In one scenario of the embodiment of the present application, if the SSB corresponding to the beam with successful listening and avoiding is different from the SSB used for receiving the random access request, it is indicated that the base station needs to switch the SSB to the SSB corresponding to the beam with successful listening and avoiding currently, and the terminal does not need to be instructed to switch the SSB, so as to send a second connection response that does not carry beam indication information.

In another scenario of this embodiment, if the base station prepares to send an RRC connection response, it monitors that the SSB corresponding to the beam that has been successfully avoided is the same as the SSB corresponding to the beam that is used to receive the random access request sent by the terminal, that is, the SSB corresponding to the beam that is used to send data at the base station end has no change, and if it monitors that there is an associated CSI-RS in the SSB that has been successfully avoided, it sends an RRC connection response that carries beam indication information, and informs the terminal that the beam corresponding to the CSI-RS needs to be switched to, so as to implement beam switching.

As shown in tables 3 to 8 below, a downlink assignment index field in downlink control information DCI may be used as the beam indication field.

Tables 3 to 8

In the unauthorized scenario, the method for the base station to monitor the avoidance to determine the beam that the monitoring of the avoidance is successful may refer to the description in the embodiment of fig. 7, which is not repeated here.

Further, the terminal monitors the beam corresponding to the first SSB and the beam with successful monitoring avoidance to receive the RRC connection response sent by the base station, and the method for performing beam monitoring avoidance by the terminal may refer to the description in the embodiment corresponding to fig. 12, which is not repeated herein.

It should be noted that, each table in the embodiments of the present application, and the embodiments in the listed scenarios are only examples, and do not limit the present application.

In order to implement the above embodiments, the present embodiment provides a base station, and fig. 14 is a schematic structural diagram of the base station provided in the embodiment of the present application.

As shown in fig. 14, the base station comprises a memory 1401, a transceiver 1402 and a processor 1403.

A memory 1401 for storing a computer program; a transceiver 1402 for transceiving data under the control of the processor 1403; a processor 1403 for reading the computer program in the memory 1401 and performing the following operations:

receiving a random access request sent by a terminal;

receiving a Radio Resource Control (RRC) connection request sent by a terminal, wherein the RRC connection request carries quality detection information, and the quality detection information is obtained by the terminal through beam quality detection according to measurement indication information;

It should be noted that the explanation of the embodiment of fig. 1 is also applicable to the base station of this embodiment, and the principle is the same, and will not be repeated here.

The processor 1403 may be CPU, ASIC, FPGA or CPLD, and the processor 1403 may also employ a multi-core architecture.

In a possible implementation manner of the embodiment of the present application, before the receiving the random access request sent by the terminal, the method further includes:

In a possible implementation manner of the embodiment of the present application, the receiving the radio resource control RRC connection request sent by the terminal includes:

In a possible implementation manner of the embodiment of the present application, the quality detection information is further used to instruct the terminal to monitor SSB corresponding to a beam with failed back-off when sending the RRC connection request, and the sending a first RRC connection response to the terminal includes:

In a possible implementation manner of the embodiment of the present application, after the monitoring of the corresponding beam according to the reserved SSB to determine a beam with a successful monitoring avoidance, the method further includes:

In one possible implementation manner of the embodiment of the present application, the association relationship includes: a list of associations;

In one possible implementation manner of the embodiment of the present application, the association relationship includes: associating strategies;

In one possible implementation of an embodiment of the present application, the number threshold comprises a number threshold along a positive order and/or a negative order of the available SSB sequences.

In a possible implementation manner of the embodiment of the present application, the SIB message further carries reference signal configuration information, which is used to indicate channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

In one possible implementation manner of the embodiment of the present application, the index value of the CSI-RS associated with the SSB with the index value of M is greater than or equal to (nxm) and less than or equal to (nxm+n-1); wherein N is the total number of CSI-RSs associated with a single SSB, and N and M are natural numbers.

In a possible implementation manner of the embodiment of the present application, the quality detection information includes: one or more of an index value of a best quality SSB, a reference signal received power value RSRP of each of the candidate SSBs, an RSRP of each of the candidate SSB-associated CSI-RS, a quality rank of each of the candidate SSBs, and a quality rank of each of the candidate SSB-associated CSI-RS.

In one possible implementation manner of the embodiment of the present application, after the sending of the random access response to the terminal, the method further includes:

In a possible implementation manner of the embodiment of the present application, the target SSB is configured to receive data on a downlink shared channel PDSCH and/or transmit data on an uplink shared channel PUSCH by the terminal.

In one possible implementation manner of the embodiment of the present application, the measurement indication information is carried on reserved bits in downlink control information DCI.

In one possible implementation manner of the embodiment of the present application, the beam indication information is carried in a downlink allocation index field in downlink control information DCI.

It should be noted that, the base station provided in the embodiment of the present application can implement all the method steps implemented in the method embodiments of fig. 1, fig. 2, fig. 7 and fig. 8, and the method steps implemented in the base station side of fig. 13, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiments in the embodiment are omitted herein.

In order to achieve the above embodiment, the embodiment of the present application further provides a terminal. Fig. 15 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in fig. 15, the terminal includes a memory 1501, a transceiver 1502, and a processor 1503.

As shown in fig. 15, includes a memory 1501, a transceiver 1502, and a processor 1503.

A memory 1501 for storing a computer program; a transceiver 1502 for transceiving data under control of the processor; a processor 1503 for reading the computer program in the memory and performing the following operations:

sending a random access request to a base station;

receiving measurement indication information sent by a base station;

transmitting a Radio Resource Control (RRC) connection request to a base station, wherein the RRC connection request carries quality detection information, and the quality detection information is obtained by detecting the beam quality of a synchronous broadcast block (SSB) according to measurement indication terminal information;

receiving an RRC connection response sent by a base station, wherein the RRC connection response carries beam indication information and is used for indicating a terminal to determine a target SSB according to quality detection information;

the target SSB is employed to transmit and/or receive data.

The processor 1503 may be CPU, ASIC, FPGA or a CPLD, and the processor 1503 may employ a multi-core architecture.

Further, in one possible implementation manner of the embodiment of the present application, before sending the random access request to the base station, the method further includes:

In one possible implementation manner of the embodiment of the present application, the sending a radio resource control RRC connection request to the base station includes:

In one possible implementation manner of the embodiment of the present application, the number of beams for which the listening avoidance is successful is multiple; the sending the RRC connection request by using the beam with the successful listening avoidance includes:

And transmitting the RRC connection request by adopting the reserved beam.

In a possible implementation manner of the embodiment of the present application, after monitoring the beam corresponding to the first SSB and the beam corresponding to the second SSB to determine a beam for which monitoring avoidance is successful, the method further includes:

In one possible implementation manner of the embodiment of the present application, the receiving the RRC connection response sent by the base station includes:

In a possible implementation manner of the embodiment of the present application, the receiving measurement indication information sent by the base station includes:

In one possible implementation manner of the embodiment of the present application, the measurement indication information is carried on reserved bits in downlink control information DCI; the beam indication information is carried in a downlink allocation index field in downlink control information DCI.

It should be noted that, the above terminal provided in this embodiment of the present application can implement all the method steps implemented in the method embodiments of fig. 9 to 12 and the method steps implemented in the terminal side of fig. 13, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiments in this embodiment are omitted.

In order to implement the above embodiment, the embodiment of the present application further provides a random access device. Fig. 16 is a schematic structural diagram of a random access device according to an embodiment of the present application.

As shown in fig. 16, the apparatus includes: a first receiving module 1601, a first transmitting module 1602, a second receiving module 1603, and a second transmitting module 1604.

A first receiving module 1601, configured to receive a random access request sent by a terminal.

A first sending module 1602, configured to send a random access response to the terminal, where the random access response carries measurement indication information, and is configured to instruct the terminal to detect beam quality of the synchronization broadcast block SSB.

A second receiving module 1603, configured to receive a radio resource control RRC connection request sent by the terminal, where the RRC connection request carries quality detection information, where the quality detection information is obtained by the terminal performing beam quality detection according to the measurement indication information.

The second sending module 1604 is configured to send a first RRC connection response to the terminal, where the first RRC connection response carries beam indication information, and is configured to instruct the terminal to determine, according to the quality detection information, a target SSB for sending and/or receiving data.

Further, in a possible implementation manner of the embodiment of the present application, the apparatus further includes:

and the broadcasting module is used for broadcasting a System Information Block (SIB) message to the terminal, wherein the SIB message carries an association relation among SSBs, the association relation is used for determining candidate SSBs for quality detection, and the candidate SSBs comprise a first SSB adopted by the terminal for sending a random access request and a second SSB with the association relation with the first SSB.

In one possible implementation manner of the embodiment of the present application, the second receiving module 1603 is specifically configured to:

In a possible implementation manner of the embodiment of the present application, the quality detection information is further used for indicating SSB corresponding to a beam with failure to monitor for avoidance when the terminal sends the RRC connection request, and the second sending module 1604 is specifically configured to:

according to the quality detection information, eliminating SSB corresponding to the beam with monitoring avoidance failure and SSB with quality lower than a set quality threshold value from the first SSB and the second SSB to obtain reserved SSB;

In a possible implementation manner of the embodiment of the present application, the second sending module 1604 is further configured to:

and if the SSB corresponding to the beam with successful monitoring avoidance is different from the SSB for receiving the random access request, sending a second RRC connection response, wherein the second RRC connection response does not carry beam indication information.

the association strategy comprises a number threshold value, wherein the number threshold value is used for determining a first SSB and a second SSB with association relation in an available SSB sequence of the base station, and the number of continuous or discontinuous available SSBs between the second SSB and the first SSB is smaller than or equal to the number threshold value.

In one possible implementation of an embodiment of the application, the number threshold comprises a number threshold along the positive and/or negative order of the available SSB sequences.

In a possible implementation manner of the embodiment of the present application, the SIB message further carries reference signal configuration information, which is used to indicate channel state information reference signals CSI-RS associated with each SSB; measurement indication information is also used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

beam indication information, comprising: the method comprises the steps of determining strategy indication information of a target SSB, determining strategy indication information of the target CSI-RS from target SSB associated CSI-RS, and combining one or more of index values of the target CSI-RS and index values of the target SSB.

In a possible implementation manner of the embodiment of the present application, the apparatus further includes:

and a third sending module, configured to send a retransmission instruction of the RRC connection request to the terminal, where the retransmission instruction carries the measurement instruction information.

It should be noted that, the base station provided in this embodiment of the present application can implement all the method steps implemented by the corresponding embodiment of the random access method implemented by the base station end, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.

In order to implement the above embodiment, the embodiment of the present application further provides a random access device. The device is disposed in a terminal, and fig. 17 is a schematic structural diagram of a random access device according to an embodiment of the present application.

As shown in fig. 17, the apparatus includes: a first transmitting module 1701, a first receiving module 1702, a second transmitting module 1703, and second receiving modules 1704 and 1705.

A first transmitting module 1701, configured to transmit a random access request to a base station.

The first receiving module 1702 is configured to receive measurement indication information sent by a base station.

And a second sending module 1703, configured to send a radio resource control RRC connection request to the base station, where the RRC connection request carries quality detection information, where the quality detection information is obtained by the terminal detecting beam quality of the synchronization broadcast block SSB according to the measurement indication information.

The second receiving module 1704 is configured to receive an RRC connection response sent by the base station, where the RRC connection response carries beam indication information, and is configured to instruct the terminal to determine the target SSB according to the quality detection information.

A transmission module 1705 for transmitting and/or receiving data using the target SSB.

a third receiving module, configured to receive a system information block SIB message broadcasted by a base station, where the SIB message carries an association relationship between SSBs;

The determining module is used for determining candidate SSB according to the association relation; the candidate SSB comprises a first SSB adopted by the terminal for sending the random access request and a second SSB which has an association relation with the first SSB.

In one possible implementation manner of the embodiment of the present application, the second sending module 1703 includes:

the monitoring unit is used for monitoring the beam corresponding to the first SSB and the beam corresponding to the second SSB so as to determine a beam with successful monitoring avoidance;

and the sending unit is used for sending the RRC connection request by adopting the beam with the successful monitoring avoidance.

In one possible implementation manner of the embodiment of the application, a plurality of beams which are monitored to be avoided successfully are monitored; the above-mentioned sending unit is specifically configured to:

screening the beams successfully monitored and avoided according to the quality detection information to obtain reserved beams; the RRC connection request is transmitted using the reserved beam.

In a possible implementation manner of the embodiment of the present application, the second sending module 1703 further includes:

an updating unit, configured to delete, in the quality detection information, a reference signal receiving power value RSRP for SSBs corresponding to beams that fail to monitor avoidance; or in the quality detection information, updating quality sequencing of SSB corresponding to the beam with failed monitoring avoidance; or in the quality detection information, updating quality sequencing of SSB corresponding to the beam with failed monitoring avoidance, and re-sequencing the SSB with successful monitoring avoidance; or deleting the index value of the SSB corresponding to the beam with failed monitoring avoidance in the quality detection information.

In one possible implementation manner of the embodiment of the present application, the second receiving module 1704 is specifically configured to:

In one possible implementation manner of the embodiment of the present application, the quality detection information includes: one or more of an index value of the SSB with the best quality, a reference signal received power value RSRP of each candidate SSB, an RSRP of each candidate SSB-associated CSI-RS, a quality rank of each candidate SSB, and a quality rank of each candidate SSB-associated CSI-RS.

In one possible implementation manner of the embodiment of the present application, the first receiving module 1702 is specifically configured to:

receiving a retransmission instruction of an RRC connection request sent by a base station, wherein the retransmission instruction carries measurement instruction information; or receiving a random access response sent by the base station, wherein the random access response carries measurement indication information.

In one possible implementation manner of the embodiment of the present application, the measurement indication information is carried on reserved bits in the downlink control information DCI; the beam indication information is carried in a downlink allocation index field in downlink control information DCI.

It should be noted that, the above terminal provided by the embodiment of the present application can implement all the method steps implemented by the method embodiment executed by the above terminal, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the present embodiment are omitted herein.

It should be noted that, in each embodiment of the present application, each functional unit may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or partly in the form of a software product or all or part of the technical solution, where the software product is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network side device, etc.) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

To achieve the above embodiments, the present application also proposes a processor-readable storage medium.

Wherein the processor readable storage medium stores a computer program for causing the processor to execute the present application to implement the random access method described in the embodiments of fig. 1, fig. 2, fig. 7 and fig. 8.

Among other things, processor-readable storage media can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disks, hard disks, tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.

Wherein the processor readable storage medium stores a computer program for causing the processor to perform the random access method according to the embodiments of the methods of fig. 9 to 12 of the present application.

It will be appreciated by those skilled in the art that 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, magnetic disk storage, 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 embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable 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 processor-executable instructions may also be stored in a processor-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 processor-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 processor-executable 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 modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A random access method, wherein the method is used for a base station, and comprises:

receiving a random access request sent by a terminal;

2. The random access method according to claim 1, wherein before the receiving the random access request sent by the terminal, further comprising:

3. The random access method according to claim 2, wherein the receiving the radio resource control RRC connection request sent by the terminal includes:

4. The random access method according to claim 3, wherein the quality detection information is further used to instruct the terminal to send the RRC connection request, to listen to SSBs corresponding to beams that fail to avoid, and the sending the first RRC connection response to the terminal includes:

5. The random access method according to claim 4, wherein after the corresponding beam is monitored according to the reserved SSB to determine a beam for which monitoring is successful, further comprising:

And if the SSB corresponding to the beam with successful monitoring avoidance is different from the SSB for receiving the random access request, sending a second RRC connection response, wherein the beam indication information is not carried in the second RRC connection response.

6. The random access method according to claim 2, wherein the association relation includes: a list of associations; the association list comprises indexes of the first SSB and indexes of the second SSB with association relation;

and/or, the association relationship comprises: associating strategies; the association policy comprises a number threshold, wherein the number threshold is used for determining the first SSB and the second SSB with association relation in an available SSB sequence of the base station, and the number of continuous or discontinuous available SSBs between the second SSB and the first SSB is smaller than or equal to the number threshold; wherein the number threshold comprises a number threshold along the positive and/or negative order of the available SSB sequences.

7. The random access method according to claim 2, wherein the SIB message further carries reference signal configuration information for indicating channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

8. The random access method according to any one of claims 1-7, further comprising, after the sending of the random access response to the terminal:

9. The random access method according to any of claims 1-7, wherein the target SSB is configured to receive data on a downlink shared channel PDSCH and/or transmit data on an uplink shared channel PUSCH by the terminal.

10. A random access method, wherein the method is used for a terminal, and comprises:

sending a random access request to a base station;

receiving measurement indication information sent by the base station;

and transmitting and/or receiving data by adopting the target SSB.

11. The random access method according to claim 10, wherein before the sending the random access request to the base station, further comprising:

according to the association relation, determining candidate SSB; the candidate SSB comprises a first SSB adopted by the terminal for sending the random access request and a second SSB which has an association relation with the first SSB.

12. The random access method according to claim 11, wherein the sending a radio resource control, RRC, connection request to the base station comprises:

13. The random access method according to claim 12, wherein the number of the beams for which the listening avoidance is successful is plural; the sending the RRC connection request by using the beam with the successful listening avoidance includes:

and transmitting the RRC connection request by adopting the reserved beam.

14. The random access method of claim 12, wherein after the listening to the beam corresponding to the first SSB and the beam corresponding to the second SSB to determine a beam for which listening avoidance is successful, further comprising:

15. The random access method according to claim 12, wherein the receiving the RRC connection response sent by the base station includes:

16. The random access method of claim 11, wherein the association relationship comprises: a list of associations; the association list comprises indexes of the first SSB and indexes of the second SSB with association relation;

and/or, the association relationship comprises: associating strategies; the association policy comprises a number threshold value, wherein the number threshold value is used for determining the first SSB and the second SSB with association relation in an available SSB sequence of the base station, and the number of available SSBs which are continuous or discontinuous between the second SSB and the first SSB is smaller than or equal to the number threshold value; wherein the number threshold comprises a number threshold along the positive and/or negative order of the available SSB sequences.

17. The random access method according to claim 11, wherein the SIB message further carries reference signal configuration information for indicating channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

18. The random access method according to any one of claims 10 to 17, wherein the receiving measurement indication information sent by the base station includes:

19. A base station comprising a memory, a transceiver, and a processor;

receiving a random access request sent by a terminal;

20. The base station according to claim 19, wherein before receiving the random access request sent by the terminal, the base station further comprises:

21. The base station according to claim 20, wherein the receiving the radio resource control, RRC, connection request sent by the terminal comprises:

22. The base station of claim 21, wherein the quality detection information is further configured to instruct the terminal to send the RRC connection request while listening for SSBs corresponding to beams that fail to avoid, and wherein the sending the first RRC connection response to the terminal includes:

23. The base station of claim 22, wherein after listening to the corresponding beam according to the reserved SSB to determine a beam for which listening to avoid is successful, further comprising:

24. The base station of claim 20, wherein the association relationship comprises: a list of associations; the association list comprises indexes of the first SSB and indexes of the second SSB with association relation;

25. The base station according to claim 20, wherein the SIB message further carries reference signal configuration information for indicating channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

26. The base station according to any of claims 19-25, further comprising, after said sending a random access response to said terminal:

27. The base station according to any of claims 19-25, wherein the target SSB is configured to receive data on a downlink shared channel PDSCH and/or transmit data on an uplink shared channel PUSCH by the terminal.

28. A terminal comprising a memory, a transceiver, and a processor;

sending a random access request to a base station;

receiving measurement indication information sent by the base station;

and transmitting and/or receiving data by adopting the target SSB.

29. The terminal of claim 28, wherein prior to sending the random access request to the base station, further comprising:

30. The terminal of claim 29, wherein the sending a radio resource control, RRC, connection request to the base station comprises:

31. The terminal of claim 30, wherein the number of beams for which the listening avoidance is successful is multiple; the sending the RRC connection request by using the beam with the successful listening avoidance includes:

and transmitting the RRC connection request by adopting the reserved beam.

32. The terminal of claim 30, wherein after the listening to the beam corresponding to the first SSB and the beam corresponding to the second SSB to determine a beam for which listening avoidance is successful, further comprising:

33. The terminal of claim 30, wherein the receiving the RRC connection response sent by the base station comprises:

34. The terminal of claim 29, wherein the association relationship comprises: a list of associations; the association list comprises indexes of the first SSB and indexes of the second SSB with association relation;

35. The terminal according to claim 29, wherein the SIB message further carries reference signal configuration information for indicating channel state information reference signals CSI-RS associated with each SSB; the measurement indication information is further used for indicating the quality detection of the CSI-RS associated with the candidate SSB;

36. The terminal according to any of the claims 28-35, wherein said receiving measurement indication information sent by the base station comprises:

37. A random access device for a base station, comprising:

A first sending module, configured to send a random access response to the terminal, where the random access response carries measurement indication information, and is configured to instruct the terminal to detect beam quality of a synchronous broadcast block SSB;

38. A random access device for a terminal, comprising:

a second sending module, configured to send a radio resource control RRC connection request to the base station, where the RRC connection request carries quality detection information, where the quality detection information is obtained by the terminal detecting beam quality of a synchronization broadcast block SSB according to the measurement indication information;

The second receiving module is used for receiving an RRC connection response sent by the base station, wherein the RRC connection response carries beam indication information and is used for indicating the terminal to determine a target SSB according to the quality detection information;

39. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to perform the random access method of any one of claims 1 to 9.

40. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to perform the random access method of any one of claims 10 to 18.