CN117200947A

CN117200947A - Information transmission method and communication device

Info

Publication number: CN117200947A
Application number: CN202210584139.XA
Authority: CN
Inventors: 朱世超; 孙飞; 曾清海
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2023-12-08
Also published as: WO2023226664A1

Abstract

The application provides an information transmission method and a communication device, wherein the method comprises the following steps: receiving first information sent by source access network equipment, wherein the first information is used for determining a first RA-RNTI and a first wave beam, the first RA-RNTI is used for scrambling a first PDCCH, the first PDCCH is used for bearing scheduling information of msg2, and the first wave beam is used for transmitting the msg1 and the msg2; determining a first RA-RNTI and a first beam based on the first information; receiving a first PDCCH broadcasted by target access network equipment; descrambling the first PDCCH based on the first RA-RNTI to obtain the scheduling information of the msg2; based on the msg2 scheduling information, msg2 broadcast by the target access network device is received through the first beam. Based on the method provided by the application, the non-group-head UE is favorable for accurately receiving the TA information of the group-head UE and the uplink resource allocation information of the non-group-head UE.

Description

Information transmission method and communication device

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information transmission method and a communications device.

Background

In a mobile communication system, in a basic handover procedure, mobility management of a connected User Equipment (UE) is controlled by an access network device, i.e. the access network device instructs the UE to which cell to handover to and how to perform the handover by sending a handover message. For example, the existing cell handover procedure may be as shown in fig. 1. Wherein:

101. The source base station transmits a radio resource control (radio resource control, RRC) reconfiguration message to the UE in a connected state. For example, the RRC reconfiguration message may include parameters of a measurement object, a reporting configuration, a measurement identity, and the like.

102. And the UE forms a measurement report to the source base station connected currently after measuring a series of cells according to the RRC reconfiguration message.

103. After receiving the measurement report, the source base station determines whether the UE needs to perform cell handover.

104. If it is determined that the UE needs to perform cell handover, the source base station sends a handover request message to the target base station.

105. After receiving the handover request, the target base station determines whether to allow the access of the UE according to the number of own connections and the like.

106. If the UE is allowed to access, the target base station sends a handover confirm message to the source base station. For example, the handover confirm message contains information about the target cell and configuration parameters required for the UE to access the target cell.

107. After receiving the handover confirm message sent by the target base station, the source base station sends an RRC reconfiguration message (i.e., a handover command) to the UE. The content included in the RRC reconfiguration message is the handover confirm message from step 106, which corresponds to the source base station being transparent.

108. After receiving the RRC reconfiguration message, the UE initiates random access to the target base station according to the RRC reconfiguration message.

In the existing switching flow, the UE disconnects from the source base station, and before the UE successfully accesses the target base station, the UE transmits and receives data with a short interruption.

109. The UE sends an RRC reconfiguration complete message to the target base station.

110. After receiving the RRC reconfiguration complete message, the target base station sends a context release message to the source base station, so that the source base station releases the context of the UE.

The random access procedure of step 108 may be expanded as shown in fig. 2, wherein:

201. the UE transmits message 1 (msg 1) to the target base station using beam 1 corresponding to the SSB. The msg1 includes a preamble.

Specifically, the UE may select an SSB with signal quality higher than the threshold value, and transmit msg1 to the target base station using beam 1, where beam 1 is the beam corresponding to the selected SSB.

202. After the target base station receives msg1, it sends message 2 (msg 2) to the UE using beam 1. The msg2 includes Timing Advance (TA) information and initial uplink resource allocation information (UL grant) of the UE for uplink synchronization.

Before the target base station transmits msg2, a PDCCH for scheduling msg2 may also be transmitted. The PDCCH is scrambled by a random access radio network temporary identity (random access radio network temporary identifier, RA-RNTI). After the target base station receives msg1, the RA-RNTI may be determined based on the time-frequency resources of the preamble.

Accordingly, the UE also determines RA-RNTI based on the time-frequency resources of the preamble. And descrambling the PDCCH through the RA-RNTI to acquire the scheduling information of the msg2. The UE receives msg2 using beam 1 based on the scheduling information of msg2.

In order to save signaling overhead, a Group handover (Group HO) technique is currently proposed. The source base station may consider a plurality of UEs as one "Group", and make a cell handover decision in a unit of a Group, and when cell handover is required, request a target base station to make a cell handover in a unit of a Group. After the source base station sends a group switching request to the target base station, the target base station prepares resources for all the UEs in the group.

Considering that the distance between UEs in a group is close, in order to save signaling overhead, the group head UE may be made to transmit msg1, and the non-group head UE may not transmit msg1. Non-group head UEs may directly receive msg2, where msg2 includes TA information of group head UEs and uplink resource allocation information of all UEs. And the non-group-head UE performs uplink synchronization according to the TA information of the group-head UE. How to accurately receive TA information of the non-group-head UE and uplink resource allocation information of the non-group-head UE is a problem to be solved currently.

Disclosure of Invention

The embodiment of the application provides an information transmission method and a communication device, which are beneficial to non-group-head UE (user equipment) to accurately receive TA (timing advance) information of group-head UE and uplink resource allocation information of the non-group-head UE.

In a first aspect, the present application provides an information transmission method. Alternatively, the method may be performed by a non-head-set UE, or may be performed by a component of the non-head-set UE (e.g., a processor, a chip, or a system-on-chip, etc.), or may be implemented by a logic module or software that is capable of implementing all or part of the functions of the non-head-set UE. The method comprises the following steps:

receiving first information sent by source access network equipment, wherein the first information is used for determining a first random access radio network temporary identifier (RA-RNTI) and a first beam, the first RA-RNTI is used for scrambling a first Physical Downlink Control Channel (PDCCH), the first PDCCH is used for carrying scheduling information of a message (msg) 2, the first beam is used for transmitting msg1 and msg2, the msg1 comprises a preamble, and the msg2 comprises Time Advance (TA) information of a group head UE in a UE group and uplink resource allocation information of all UEs in the UE group; determining a first RA-RNTI and a first beam based on the first information; receiving a first PDCCH scrambled by a first RA-RNTI broadcasted by target access network equipment; descrambling the first PDCCH based on the first RA-RNTI to obtain the scheduling information of the msg 2; based on the msg2 scheduling information, msg2 broadcast by the target access network device is received through the first beam.

It can be seen that, based on the method described in the first aspect, the non-group-head UE may acquire the first RA-RNTI and transmit the first beam of msg2, so that the first PDCCH may be parsed based on the first RA-RNTI to obtain the scheduling information of msg2, and further, based on the scheduling information of msg2 and the first beam, msg2 may be received. The msg2 includes TA information of the group head UE and uplink resource allocation information of the non-group head UE. Therefore, based on the method described in the first aspect, it is beneficial for the non-group-head UE to accurately receive TA information of the group-head UE and uplink resource allocation information of the non-group-head UE.

In one possible implementation, the specific implementation manner of receiving the first information sent by the source access network device is: the first information transmitted by the source access network device through a Radio Resource Control (RRC) message is received. The transmission of the first information by RRC message is less modified to the existing protocol.

In one possible implementation, the specific implementation manner of receiving the first information sent by the source access network device is: receiving a second PDCCH broadcasted by source access network equipment, wherein the second PDCCH is scrambled by a G-RNTI of a UE group, and the second PDCCH is used for bearing scheduling information of the first information; descrambling the second PDCCH based on the G-RNTI of the UE group to obtain scheduling information of the first information; the scheduling information based on the first information receives first information broadcast by the source access network device. The first information is sent in a broadcast mode, so that signaling overhead can be saved.

In one possible implementation, after receiving the first information sent by the source access network device, third information may also be sent to the source access network device, where the third information indicates that the non-group-head UE has received the first information. By indicating to the source access network device that the non-group-head UE has received the first information, the source access network device may notify the target access network device that the first PDCCH and msg2 may be transmitted when all of the non-group-head UEs have received the first information. Thereby avoiding that the target access network equipment sends the first PDCCH and the msg2 prematurely, and the non-group-head UE cannot successfully receive the first PDCCH and the msg2.

In one possible implementation, the first information indicates one or more of the following information: the first RA-RNTI, a Physical Random Access Channel (PRACH) resource to which the preamble corresponds, the preamble, an identity of the first beam, or an identity of a Synchronization Signal Block (SSB) to which the first beam corresponds. Based on this possible implementation, it is advantageous for the non-group-headed UE to accurately determine the first RA-RNTI and the first beam.

In one possible implementation, before receiving the first information sent by the source access network device, a second command sent by the source access network device may also be received; the second command carries the identifier of the group head UE; or the second command carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the first command name sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE. Based on this possible implementation, which UEs are non-group head UEs may be notified by the second command, so that the non-group head UEs may perform the corresponding operation.

In one possible implementation, the second command also carries a group mobile user temporary identity (G-RNTI) for the UE group. Based on the possible implementation manner, the non-group-head UE can acquire the G-RNTI, so that the second PDCCH can be analyzed based on the G-RNTI later to obtain the scheduling information of the first information.

In one possible implementation, the first command and the second command indicate a cell handover. Based on the possible implementation manner, the first command and the second command are used for both cell handover and indication of the non-group-head UE, so that additional signaling can be avoided, and signaling overhead can be saved.

In a second aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the source access network device, or by a component of the source access network device (e.g., a processor, a chip, or a system-on-a-chip, etc.), or by a logic module or software that is capable of implementing all or part of the functions of the source access network device. The method comprises the following steps:

receiving first information sent by target access network equipment, wherein the first information is used for determining a first random access radio network temporary identifier (RA-RNTI) and a first beam, the first RA-RNTI is used for scrambling a first Physical Downlink Control Channel (PDCCH), the first PDCCH is used for carrying scheduling information of a message (msg) 2, the first beam is used for transmitting msg1 and msg2, the msg1 comprises a preamble, and the msg2 comprises Time Advance (TA) information of a group head UE in a UE group and uplink resource allocation information of all UEs in the UE group; and sending the first information to non-group head UE in the UE group.

In one possible implementation, the specific implementation of sending the first information to the non-group-head UE in the UE group is: the first information is transmitted to non-group-head UEs in the UE group through a Radio Resource Control (RRC) message.

In one possible implementation, the specific implementation of sending the first information to the non-group-head UE in the UE group is: broadcasting a second PDCCH, wherein the second PDCCH is scrambled by a group mobile user temporary identity (G-RNTI) of the UE group, and the second PDCCH is used for bearing scheduling information of the first information; the first information is broadcast.

In one possible implementation, after sending the first information to the non-head-of-group UEs in the UE group, a timer may also be started; when the timer expires, second information is transmitted to the target access network device, the second information indicating transmission of the first PDCCH and msg2. Based on the possible implementation manner, the target access network device can be prevented from sending the first PDCCH and the msg2 too early, so that the non-group-head UE cannot successfully receive the first PDCCH and the msg2.

In one possible implementation, after the first information is sent to the non-group-head UEs in the UE group, when receiving third information sent by all the non-group-head UEs, second information may also be sent to the target access network device, where the second information indicates that the first PDCCH and msg2 are sent, and the third information indicates that the non-group-head UE has received the first information. Based on the possible implementation manner, the target access network device can be prevented from sending the first PDCCH and the msg2 too early, so that the non-group-head UE cannot successfully receive the first PDCCH and the msg2.

In one possible implementation, the first information indicates one or more of the following information: the first RA-RNTI, a Physical Random Access Channel (PRACH) resource to which the preamble corresponds, the preamble, an identity of the first beam, or an identity of a Synchronization Signal Block (SSB) to which the first beam corresponds.

In one possible implementation, before receiving the first information sent by the target access network device, the following steps may be further performed: transmitting a group switching request to target access network equipment, wherein the group switching request is used for requesting cell switching of a UE group, and the group switching request carries an identifier of a group head UE; receiving switching confirmation information sent by target access network equipment; sending a first command to a group head UE; sending a second command to the non-group head UE; the first command and the second command both carry the identifier of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE, and the second command carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

In one possible implementation, the second command also carries a group mobile user temporary identity (G-RNTI) for the UE group.

In one possible implementation, the first command and the second command indicate a cell handover.

In a third aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the target access network device, or may be performed by a component (e.g., a processor, a chip, or a system-on-a-chip) of the target access network device, or may be implemented by a logic module or software that is capable of implementing all or part of the functions of the target access network device. The method comprises the following steps:

receiving a message (msg) 1 transmitted by a group head User Equipment (UE) in a group of UEs using a first beam, the msg1 including a preamble; transmitting first information to a source access network device, wherein the first information is used for determining a first random access radio network temporary identifier (RA-RNTI) and a first beam, the first RA-RNTI is used for scrambling a first Physical Downlink Control Channel (PDCCH), the first PDCCH is used for bearing scheduling information of msg2, and the msg2 comprises Time Advance (TA) information of a group head UE and uplink resource allocation information of all UEs in a UE group; broadcasting a first PDCCH scrambled by a first RA-RNTI; msg2 is broadcast over the first beam.

In one possible implementation, before transmitting the first PDCCH scrambled by the first RA-RNTI, second information transmitted by the source access network device may also be received, the second information indicating transmission of the first PDCCH and msg2.

In one possible implementation, before receiving a message (msg) 1 sent by a group head UE in a User Equipment (UE) group by using a first beam, a group handover request sent by a source access network device may also be received, where the group handover request is used to request cell handover for the UE group, and the group handover request carries an identifier of the group head UE; and sending the handover confirmation information to the source access network device.

The advantages of the second and third aspects may be referred to as the corresponding advantages of the first aspect, and are not described here in detail.

In a fourth aspect, the present application provides an information transmission method. Alternatively, the method may be performed by a non-head-set UE, or may be performed by a component of the non-head-set UE (e.g., a processor, a chip, or a system-on-chip, etc.), or may be implemented by a logic module or software that is capable of implementing all or part of the functions of the non-head-set UE. The method comprises the following steps:

Receiving a first PDCCH scrambled by a group mobile user temporary identifier (G-RNTI) of a UE group, which is broadcasted by target access network equipment, wherein the first PDCCH is used for bearing scheduling information of first information; descrambling the first PDCCH based on the G-RNTI to obtain scheduling information of the first information; and receiving first information broadcasted by the target access network equipment based on the scheduling information of the first information, wherein the first information comprises Time Advance (TA) information of the group head UE in the UE group and uplink resource allocation information of all non-group head UEs in the UE group.

Based on the method described in the fourth aspect, the target access network device may broadcast TA information of the group-head UEs in the UE group and uplink resource allocation information of all non-group-head UEs in the UE group based on the G-RNTI. Thus, the non-group head UE may receive TA information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group based on the G-RNTI.

In one possible implementation, a second command sent by the source access network device may also be received, where the second command carries a G-RNTI of the UE group; the second command also carries an identifier of the group head UE; or the second command also carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the signaling name of the first command sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE. Based on this possible implementation, which UEs are non-group head UEs may be notified by the second command, so that the non-group head UEs may perform the corresponding operation. And the G-RNTI of the UE group can be indicated through the second command, and the first PDCCH can be descrambled based on the G-RNTI to obtain the scheduling information of the first information.

In a fifth aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the target access network device, or may be performed by a component (e.g., a processor, a chip, or a system-on-a-chip) of the target access network device, or may be implemented by a logic module or software that is capable of implementing all or part of the functions of the target access network device. The method comprises the following steps:

receiving a message (msg) 1 transmitted by a group head User Equipment (UE) in a group of UEs using a first beam, the msg1 including a preamble; broadcasting msg2 over a first beam; broadcasting a first PDCCH, wherein the first PDCCH is scrambled by a group mobile user temporary identity (G-RNTI) of a UE group, and the first PDCCH is used for bearing scheduling information of first information; first information is broadcast, wherein the first information comprises Time Advance (TA) information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group.

In one possible implementation, before receiving a message (msg) 1 sent by a group head UE in a User Equipment (UE) group by using a first beam, a group handover request sent by a source access network device may also be received, where the group handover request is used to request cell handover for the UE group, and the group handover request carries an identifier of the group head UE and a G-RNTI of the UE group; and sending the handover confirmation information to the source access network device.

In a sixth aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the source access network device, or by a component of the source access network device (e.g., a processor, a chip, or a system-on-a-chip, etc.), or by a logic module or software that is capable of implementing all or part of the functions of the source access network device. The method comprises the following steps:

transmitting a group switching request to target access network equipment, wherein the group switching request is used for requesting cell switching of a UE group, and the group switching request carries an identifier of a group head UE in the UE group and a G-RNTI of the UE group; receiving switching confirmation information sent by target access network equipment; sending a first command to a group head UE; sending a second command to the non-group-head UE, wherein the second command carries the G-RNTI of the UE group; the first command and the second command also carry the identifier of the group head UE; or the first command also carries information for indicating that the UE receiving the first command is a group head UE, and the second command also carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

The advantages of the fifth and sixth aspects are referred to as the corresponding advantages of the fourth aspect, and are not described here.

In a seventh aspect, the present application provides an information transmission method. Alternatively, the method may be performed by a non-head-set UE, or may be performed by a component of the non-head-set UE (e.g., a processor, a chip, or a system-on-chip, etc.), or may be implemented by a logic module or software that is capable of implementing all or part of the functions of the non-head-set UE. The method comprises the following steps:

and receiving TA information of the group head UE and uplink resource allocation information of the non-group head UE in the UE group sent by the source access network equipment.

Based on the method described in the seventh aspect, the non-group-head UE may accurately receive TA information of the group-head UE and uplink resource allocation information of the non-group-head UE in the UE group from the source access network device.

In one possible implementation, the specific implementation manner of receiving the TA information of the group-head UE and the uplink resource allocation information of the non-group-head UE in the UE group sent by the source access network device is: and receiving TA information of the group head UE and uplink resource allocation information of the non-group head UE in the UE group sent by the source access network equipment through a Radio Resource Control (RRC) message.

In one possible implementation, the specific implementation manner of receiving the TA information of the group-head UE and the uplink resource allocation information of the non-group-head UE in the UE group sent by the source access network device is: receiving a first PDCCH broadcasted by source access network equipment, wherein the first PDCCH is scrambled by a group mobile user temporary identifier (G-RNTI) of a UE group, the first PDCCH is used for bearing scheduling information of first information, and the first information comprises Time Advance (TA) information of group-head UEs in the UE group and uplink resource allocation information of all non-group-head UEs in the UE group; descrambling the first PDCCH by using the G-RNTI to obtain scheduling information of the first information; the receiving source access network device broadcasts the first information based on the scheduling information of the first information.

In one possible implementation, a second command sent by the source access network device may also be received; the second command carries the identifier of the group head UE; or the second command carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the signaling name of the first command sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE. Based on this possible implementation, which UEs are non-group head UEs may be notified by the second command, so that the non-group head UEs may perform the corresponding operation.

In one possible implementation, the second command also carries a group mobile user temporary identity (G-RNTI) for the UE group. Based on the possible implementation manner, the G-RNTI of the UE group may be indicated by the second command, and the first PDCCH may be descrambled based on the G-RNTI to obtain scheduling information of the first information.

In one possible implementation, the first command and the second command indicate a cell handover. In this possible implementation, the first command and the second command are used for both cell handover and for indicating the non-group-headed UE, so that the addition of extra signaling can be avoided, and the signaling overhead can be saved.

In an eighth aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the source access network device, or by a component of the source access network device (e.g., a processor, a chip, or a system-on-a-chip, etc.), or by a logic module or software that is capable of implementing all or part of the functions of the source access network device. The method comprises the following steps:

receiving first information sent by target access network equipment, wherein the first information comprises Time Advance (TA) information of group head UE in a User Equipment (UE) group and uplink resource allocation information of all non-group head UE in the UE group; and sending TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE.

In one possible implementation, the specific implementation of sending the TA information of the group head UE and the uplink resource allocation information of the non-group head UE to the non-group head UE is: and sending TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE through a Radio Resource Control (RRC) message.

In one possible implementation, the specific implementation of sending the TA information of the group head UE and the uplink resource allocation information of the non-group head UE to the non-group head UE is: broadcasting a first PDCCH, wherein the first PDCCH is scrambled by a group mobile user temporary identity (G-RNTI) of a UE group, and the first PDCCH is used for bearing scheduling information of first information; the first information is broadcast.

In one possible implementation, the method further comprises: transmitting a group switching request to target access network equipment, wherein the group switching request is used for requesting cell switching of a UE group, and the group switching request carries an identifier of a group head UE in the UE group; receiving switching confirmation information sent by target access network equipment; sending a first command to a group head UE; sending a second command to the non-group head UE; the first command and the second command carry the identification of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE, and the second command carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

In a ninth aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the target access network device, or may be performed by a component (e.g., a processor, a chip, or a system-on-a-chip) of the target access network device, or may be implemented by a logic module or software that is capable of implementing all or part of the functions of the target access network device. The method comprises the following steps:

receiving a message (msg) 1 transmitted by a group head User Equipment (UE) in a group of UEs using a first beam, the msg1 including a preamble; broadcasting msg2 using a first beam; and sending first information to the source access network equipment, wherein the first information comprises Time Advance (TA) information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group.

The advantages of the eighth aspect and the ninth aspect may be found in the corresponding advantages of the seventh aspect, and are not described here in detail.

In a tenth aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the source access network device, or by a component of the source access network device (e.g., a processor, a chip, or a system-on-a-chip, etc.), or by a logic module or software that is capable of implementing all or part of the functions of the source access network device. The method comprises the following steps: transmitting a first command to a group head UE in the UE group; sending a second command to a group head UE in the UE group; the first command and the second command carry the identification of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE, and the second command carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE. Based on the possible implementation manner, which UE is the head UE can be accurately notified through the first command, so that the head UE can perform the corresponding operation, and which UEs are the non-head UEs can be accurately notified through the second command, so that the non-head UEs can perform the corresponding operation.

In one possible implementation, the second command also carries a group mobile user temporary identity (G-RNTI) for the UE group. Based on the possible implementation manner, the G-RNTI of the UE group may be indicated by the second command, so that the TA information of the group head UE and the uplink resource allocation information of the non-group head UE within the UE group may be subsequently received based on the G-RNTI.

In an eleventh aspect, the present application provides an information transmission method. Alternatively, the method may be performed by a non-head-set UE, or may be performed by a component of the non-head-set UE (e.g., a processor, a chip, or a system-on-chip, etc.), or may be implemented by a logic module or software that is capable of implementing all or part of the functions of the non-head-set UE. The method comprises the following steps:

receiving a second command sent by source access network equipment;

the second command carries the identifier of the group head UE; or the second command carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the signaling name of the first command sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

In a twelfth aspect, the present application provides an information transmission method. Alternatively, the method may be performed by the cluster head UE, or may be performed by a component (such as a processor, a chip, or a chip system) of the cluster head UE, or may be implemented by a logic module or software that can implement all or part of the functions of the cluster head UE. The method comprises the following steps:

receiving a first command sent by source access network equipment;

the first command carries an identifier of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE; or the signaling names of the first command and the second command sent by the source access network device to the non-group-head UE are different, the first command indicates that the UE receiving the first command is the information of the group-head UE, and the second command indicates that the UE receiving the second command is the information of the non-group-head UE.

The advantages of the eleventh and twelfth aspects may be referred to as the corresponding advantages of the tenth aspect, and are not described here in detail.

In a thirteenth aspect, the present application provides a UE group determining method. Alternatively, the method may be performed by the source access network device, or by a component of the source access network device (e.g., a processor, a chip, or a system-on-a-chip, etc.), or by a logic module or software that is capable of implementing all or part of the functions of the source access network device. The method comprises the following steps:

receiving measurement reports of a plurality of UEs; determining a plurality of second User Equipments (UEs) from the plurality of UEs based on measurement reports of the plurality of UEs, the measurement reports corresponding to the second UEs indicating that the neighbor cell signal quality is higher than the serving cell signal quality by a first threshold, or that the serving cell signal quality is lower than a second threshold and the neighbor cell signal quality is higher than a third threshold; it is determined whether to divide the plurality of second UEs into one UE group based on the locations of the plurality of second UEs.

Based on this possible implementation, the UE groups that need to be cell switched can be accurately divided.

In one possible implementation, determining whether to divide the plurality of second UEs into one UE group based on the locations of the plurality of second UEs is performed by: if the degree of dispersion of the positions of the plurality of second UEs is smaller than or equal to a fourth threshold, dividing the plurality of second UEs into a UE group; if the degree of dispersion of the positions of the plurality of second UEs is greater than the fourth threshold, the plurality of second UEs are not divided into one UE group.

UEs are far apart and are considered unsuitable for group handover techniques if they are more discrete. Therefore, based on this possible implementation, the UE groups that need to be cell switched can be reasonably divided.

In one possible implementation, the cluster head UE is closest to the center location of the UE cluster in the UE cluster.

In one possible implementation, the method further comprises: and determining the position of the second UE based on the optimal beam corresponding to the second UE and Time Advance (TA) information. Based on this possible implementation, the location of the second UE can be accurately determined.

In a fourteenth aspect, the present application provides a communication apparatus, where the communication apparatus may be a non-group-head UE or a source access network device or a target access network device, or may be an apparatus in a non-group-head UE or a source access network device or a target access network device, or may be an apparatus that can be used in a matching manner with a non-group-head UE or a source access network device or a target access network device. The communication device may also be a chip system. The communication device may perform the method of any of the first to thirteenth aspects. The functions of the communication device can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the functions described above. The unit or module may be software and/or hardware. The operations and advantageous effects performed by the communication device may be referred to the method and advantageous effects described in any of the first to thirteenth aspects.

In a fifteenth aspect, the present application provides a communications apparatus comprising a processor, the method of any of the first to thirteenth aspects being performed when the processor invokes a computer program in memory.

In a sixteenth aspect, the present application provides a communication device comprising a processor and a memory, the processor and the memory coupled; the processor is configured to implement the method according to any one of the first to thirteenth aspects.

In a seventeenth aspect, the present application provides a communication device comprising a processor, a memory, and a transceiver, the processor and the memory coupled; the transceiver is configured to transmit and receive data, and the processor is configured to implement the method according to any one of the first to thirteenth aspects.

In an eighteenth aspect, the present application provides a communications device comprising a processor and an interface for receiving or outputting signals, the processor being arranged to implement a method according to any one of the first to thirteenth aspects by logic circuitry or execution of code instructions.

In a nineteenth aspect, the present application provides a computer readable storage medium having stored therein a computer program or instructions which, when executed by a communications device, implement a method as in any of the first to thirteenth aspects.

In a twentieth aspect, the present application provides a computer program product comprising instructions which, when read and executed by a computer, cause the computer to perform the method according to any of the first to thirteenth aspects.

Drawings

Fig. 1 is a flow chart of a cell handover method according to the present application;

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

FIG. 3 is a schematic diagram of a system architecture according to the present application;

fig. 4 is a schematic flow chart of an information transmission method provided by the present application;

fig. 5 is a schematic flow chart of an information transmission method provided by the present application;

fig. 6 is a schematic flow chart of an information transmission method provided by the application;

fig. 7 is a schematic flow chart of an information transmission method provided by the present application;

fig. 8 is a schematic flow chart of an information transmission method provided by the present application;

fig. 9 is a schematic flow chart of an information transmission method provided by the application;

fig. 10 is a schematic flow chart of an information transmission method provided by the present application;

FIG. 11 is a schematic flow chart of an information transmission method according to the present application;

Fig. 12 is a flow chart of a UE group determining method provided in the present application;

fig. 13 is a schematic structural diagram of a communication device according to the present application;

fig. 14 is a schematic structural diagram of a communication device according to the present application;

fig. 15 is a schematic structural diagram of a chip according to the present application.

Detailed Description

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

The terms first and second and the like in the description, in the claims and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and more, "and/or" for describing an association relationship of an association object, and three kinds of relationships may exist, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

For a better understanding of the embodiments of the present application, the following first describes a system architecture related to the embodiments of the present application:

the technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA) systems, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication systems, fifth generation (5th generation,5G) systems or new radio, NR) future communication systems, and the like.

Referring to fig. 3, fig. 3 is a schematic diagram of a system architecture according to an embodiment of the application. As shown in fig. 3, the system architecture includes a UE group, a source access network device, and a target access network device.

The UE group, the source access network device and the target access network device related to the system architecture in fig. 3 are respectively described below.

1. Source access network device

The source access network device is an access network device in a serving cell of the UE group.

The interface between the access network device and the terminal device may be a Uu interface (or referred to as a null interface). Of course, in future communications, the names of these interfaces may be unchanged or may be replaced with other names, as the application is not limited in this regard.

The access network device is a node or device for accessing the terminal device to the wireless network. The access network device may be any device having a wireless transceiver function, including but not limited to: an evolved node B (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, a base station (gNodeB or gNB) in NR or a transmission receiving point (TransmissionReceptionPoint, TRP), a base station for 3GPP subsequent evolution, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, and the like. The base station may be: macro base station, micro base station, pico base station, small station, relay station, or balloon station, etc. Multiple base stations may support networks of the same technology as mentioned above, or may support networks of different technologies as mentioned above. A base station may contain one or more co-sited or non-co-sited TRPs. The access network device may also be a radio controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in the context of a cloud radio access network (Cloud Radio Access Network, CRAN). The access network device may also be a server, a wearable device, or an in-vehicle device, etc. The following description will take an access network device as a base station as an example. The access network devices may be the same type of base station, or may be different types of base stations. The base station may communicate with the terminal device or may communicate with the terminal device through the relay station. The terminal device may communicate with a plurality of base stations of different technologies, for example, the terminal device may communicate with a base station supporting an LTE network, may communicate with a base station supporting a 5G network, and may support dual connectivity with the base station of the LTE network and the base station of the 5G network.

2. Target access network equipment

The target access network device is an access network device in a cell to which the UE group wants to access when the neighbor cell signal is higher than the serving cell signal by a first threshold, or when the serving cell signal is lower than a second threshold and the neighbor cell signal is higher than a third threshold. The description of the access network device may be referred to below the source access network device as a description of the access network device, and is not repeated herein.

3. UE group

The UE group includes a plurality of UEs. The cell switching may be performed in a UE Group unit, that is, the source access network device may consider a plurality of UEs as one "Group", and perform a cell switching decision in a Group unit, and when the cell switching needs to be performed, request the target access network device to perform the cell switching in a Group unit. After the source access network device sends a group switching request to the target access network device, the target access network device prepares resources for all the UEs in the UE group. One UE in the UE group is a group head UE, and the other UEs are non-group head UEs.

After the source access network device sends a handover command for cell handover to all UEs in the UE group, the group head UE needs to send msg1 (message 1) to the target access network device, and receive msg2 sent by the target access network device, where the msg2 includes TA information of the group head UE and uplink resource allocation information of all UEs. Non-group head UEs need not transmit msg1 and can directly receive msg2. That is, the group head UE needs to perform random access, and the non-group head UE does not need to perform random access.

The UE includes a device that provides voice and/or data connectivity to a user, e.g., the UE is a device with wireless transceiver capabilities that may be deployed on land, including indoor or outdoor, hand-held, wearable, or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) UE, an Augmented Reality (AR) UE, a wireless terminal in an industrial control (industrial control), a vehicle-mounted UE, a wireless terminal in a self driving (self driving), a wireless terminal in a remote medical (remote medical), a wireless terminal in a smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in a smart city (smart city), a wireless terminal in a smart home (smart home), a wearable UE, or the like. The embodiment of the application does not limit the application scene. A UE may also be referred to as a terminal, access UE, vehicle terminal, industrial control terminal, UE unit, UE station, mobile station, remote UE, mobile device, terminal device, wireless communication device, UE proxy, UE apparatus, or the like. The terminal may also be fixed or mobile. In the present application, UE will be referred to hereinafter as UE.

In order to accurately receive TA information of a group head UE and uplink resource allocation information of the non-group head UE, the embodiment of the application provides an information transmission method and a communication device. The information transmission method and the communication device provided by the embodiment of the application are further described below:

referring to fig. 4, fig. 4 is a flowchart of an information transmission method according to an embodiment of the present application. In the method described in fig. 4, the non-group-head UE may acquire the first RA-RNTI and transmit the first beam of msg2, so that the first PDCCH may be parsed based on the first RA-RNTI to obtain the scheduling information of msg2, and then msg2 may be received based on the scheduling information of msg2 and the first beam. The msg2 includes TA information of the group head UE and uplink resource allocation information of the non-group head UE. In fig. 4, the group head UE, the non-group head UE, the source access network device, and the target access network device are taken as the execution bodies of the method as an example, and the application is not limited to the execution bodies of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 4 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

401. The group head UE adopts a first wave beam to send msg1 to target access network equipment. Accordingly, the target access network device may receive the msg1 transmitted by the group head UE using the first beam.

Wherein the msg1 includes a preamble. msg1 is used for random access.

Alternatively, the UE may select an SSB with a signal quality higher than the threshold, and the first beam may be a beam corresponding to the selected SSB. The beam corresponding to the SSB refers to the beam transmitting the SSB. There is a correspondence between the identity of the SSB and the beam that transmitted the SSB.

402. The target access network device sends first information to the source access network device. Accordingly, the source access network device may receive the first information.

The first information is used for determining a first random access radio network temporary identifier (random access radio network temporary identifier, RA-RNTI) and a first beam, the first RA-RNTI is used for scrambling a first Physical Downlink Control Channel (PDCCH), the first PDCCH is used for carrying scheduling information of msg2, and the msg2 comprises Time Advance (TA) information of a group head UE and uplink resource allocation information of all UEs in the UE group. The scheduling information of msg2 may be time-frequency resource information of msg2.

Since the scheduling information of msg2 is carried on the first PDCCH, and the target access network device transmits msg2 using the first beam. Therefore, the non-group head UE needs to know the first RA-RNTI and the first beam to parse the first PDCCH based on the first RA-RNTI to obtain the scheduling information of msg2, and receive msg2 using the first beam based on the scheduling information of msg2.

Thus, in order for the non-group head UE to successfully receive msg2, the target access network device does not transmit the first PDCCH and msg2 immediately after receiving msg 1. But first sends the first information to the source access network device so that the source access network device can send the first information to the non-head-of-group UE. The non-group head UE can then determine the first RA-RNTI and the first beam based on the first information. After the target access network device sends the first information to the source access network device, the target access network device sends the first PDCCH and the msg2. Thus, after determining the first RA-RNTI and the first beam, the non-group-head UE analyzes the first PDCCH based on the first RA-RNTI to obtain the scheduling information of msg2, and receives the msg2 based on the scheduling information of the msg2 and the first beam.

403. The source access network device sends first information to the non-group-head UE. Accordingly, the non-head-of-group UE may receive the first information.

In one possible implementation, the source access network device may send the first information to the non-group-headed UE in one of two ways.

Mode one: the source access network device sends the first information to non-group-headed UEs in the UE group via a radio resource control (radio resource control, RRC) message. Accordingly, the non-group head UE in the UE group receives the first information sent by the source access network device through the RRC message.

Mode two: the source access network device broadcasts a second PDCCH, wherein the second PDCCH is scrambled by a group mobile user temporary identifier (group radio network temporary identifier, G-RNTI) of the UE group, and the second PDCCH is used for bearing scheduling information of the first information; the source access network device broadcasts the first information. Correspondingly, non-group-head UE in the UE group can receive a second PDCCH broadcasted by source access network equipment, the second PDCCH is scrambled by G-RNTI of the UE group, and the second PDCCH is used for bearing scheduling information of the first information; the non-group head UE may receive first information broadcast by the source access network device based on scheduling information of the first information.

Each cell group corresponds to a G-RNTI, which is used to distinguish cell groups. Therefore, the second PDCCH can be scrambled through the G-RNTI, so that only the UE in the cell group corresponding to the G-RNTI can successfully descramble the second PDCCH to obtain the scheduling information of the first information. And the non-group-head UE in the cell group corresponding to the G-RNTI can receive the first information broadcast by the source access network equipment based on the scheduling information of the first information.

404. The non-group head UE determines a first RA-RNTI and a first beam based on the first information.

In the embodiment of the application, after receiving the first information, the non-group-head UE determines the first RA-RNTI and the first beam based on the first information.

In one possible implementation, the first information indicates one or more of the following information: the first RA-RNTI, physical random access channel (physical random access channel, PRACH) resource to which the preamble corresponds, the preamble, an identity of the first beam, or an identity of a synchronization signal block (synchronization signal and PBCH block, SSB) to which the first beam corresponds. Based on this possible implementation, it is advantageous for the non-group-headed UE to accurately determine the first RA-RNTI and the first beam.

The non-group head UE may determine the first RA-RNTI based on any one of a first RA-RNTI, PRACH resources, a preamble, an identity of the first beam, and an identity of the SSB to which the first beam corresponds.

For example, assume that the first information indicates PRACH resources corresponding to a preamble. The non-group head UE may calculate the first RA-RNTI based on the PRACH resources.

It is assumed that the first information indicates a preamble. Because the PRACH resource, the preamble, the first beam and the SSB have a corresponding relation, the non-group-head UE can determine the PRACH resource based on the preamble and calculate the first RA-RNTI based on the PRACH resource.

It is assumed that the first information indicates the identity of the first beam. Because the PRACH resource, the preamble, the first beam and the SSB are in corresponding relation, the non-group-head UE can determine the PRACH resource based on the identification of the first beam, and then calculate the first RA-RNTI based on the PRACH resource.

It is assumed that the first information indicates the identity of the SSB. Because the PRACH resource, the preamble, the first beam and the SSB identifier have a corresponding relation, the non-group-head UE can determine the PRACH resource based on the SSB identifier, and then calculate the first RA-RNTI based on the PRACH resource.

Because there is a correspondence between the PRACH resource, the preamble, the first beam, and the SSB identifier, the non-group-headed UE may determine the first beam based on any one parameter of the PRACH resource, the preamble, the first beam identifier, or the SSB identifier corresponding to the first beam.

405. The target access network device broadcasts a first PDCCH scrambled by a first RA-RNTI. Accordingly, the group head UE and the non-group head UE may receive a first PDCCH scrambled by the first RA-RNTI, which is broadcast by the target access network device.

In the embodiment of the application, the target access network equipment can calculate the first RA-RNTI based on the PRACH resource. After the target access network device sends the first information to the source access network device, a first PDCCH scrambled by the first RA-RNTI is broadcasted.

406. And descrambling the first PDCCH by the non-group-head UE based on the first RA-RNTI to obtain the scheduling information of the msg2.

In the embodiment of the application, after the non-group-head UE receives the first PDCCH, the first PDCCH is descrambled based on the first RA-RNTI to obtain the scheduling information of msg2, so that the msg2 can be received based on the scheduling information of the msg2 later.

Similarly, after the first PDCCH is received by the group head UE, the first PDCCH may also be descrambled based on the first RA-RNTI to obtain the scheduling information of msg2, so that msg2 may be received based on the scheduling information of msg2. The group head UE may determine the first RA-RNTI based on the PRACH resource in advance.

407. The target access network device broadcasts msg2 over the first beam. Accordingly, the group head UE and the non-group head UE may receive msg2 broadcasted by the target access network device through the first beam based on the scheduling information of msg2 in the first PDCCH.

It can be seen that, based on the method described in fig. 4, the non-group-head UE may acquire the first RA-RNTI and transmit the first beam of msg2, so that the first PDCCH may be parsed based on the first RA-RNTI to obtain the scheduling information of msg2, and then based on the scheduling information of msg2 and the first beam, msg2 may be received. The msg2 includes TA information of the group head UE and uplink resource allocation information of the non-group head UE. Therefore, based on the method described in fig. 4, it is beneficial for the non-group-head UE to accurately receive TA information of the group-head UE and uplink resource allocation information of the non-group-head UE.

Referring to fig. 5, fig. 5 is a flowchart of another information transmission method according to an embodiment of the present application. The embodiment depicted in fig. 5 is a modification of the embodiment depicted in fig. 4. In the embodiment described in fig. 5, after the target access network device sends the first information to the source access network device, the source access network device notifies the target access network device that the first PDCCH and the msg2 can be sent, and the target access network device sends the first PDCCH and the msg2 only, so that the target access network device is prevented from sending the first PDCCH and the msg2 prematurely, and the non-group-head UE cannot successfully receive the first PDCCH and the msg2. In fig. 5, the group head UE, the non-group head UE, the source access network device, and the target access network device are taken as the execution bodies of the method as an example, and the application is not limited to the execution bodies of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 5 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

501. The group head UE adopts a first wave beam to send msg1 to target access network equipment. Accordingly, the target access network device may receive the msg1 transmitted by the group head UE using the first beam.

Wherein the msg1 includes a preamble. msg1 is used for random access.

502. The target access network device sends first information to the source access network device. Accordingly, the source access network device may receive the first information.

The first information is used for determining a first random access radio network temporary identifier (RA-RNTI) and a first beam, the first RA-RNTI is used for scrambling a first Physical Downlink Control Channel (PDCCH), the first PDCCH is used for carrying scheduling information of msg2, and the msg2 comprises Time Advance (TA) information of a group head UE and uplink resource allocation information of all UEs in the UE group.

503. The source access network device sends first information to the non-group-head UE. Accordingly, the non-head-of-group UE may receive the first information.

The descriptions of steps 501 to 503 may be referred to the description of the embodiment described in fig. 4, and are not repeated herein.

504. The source access network device starts a timer.

In the embodiment of the application, after the source access network equipment sends the first information to the non-group-head UE, a timer is started.

505. The non-group head UE determines a first RA-RNTI and a first beam based on the first information.

The description of step 505 may be referred to the description of the embodiment described in fig. 4, and is not repeated herein.

506. The non-group head UE sends third information to the source access network device, the third information indicating that the non-group head UE has received the first information. Accordingly, the source access network device may receive the third information.

In the embodiment of the application, after receiving the first information, the non-group-head UE sends third information to the source access network equipment. Step 505 may be performed first followed by step 506, or step 506 may be performed first followed by step 505.

507. When the timer expires or third information sent by all non-group head UEs is received, the source access network device sends second information to the target access network device, wherein the second information indicates to send the first PDCCH and the msg2. Accordingly, the target access network device may receive the second information.

In one possible implementation, step 504 may also be performed without performing step 506. The source access network device transmits second information to the target access network device when the timer expires, the second information indicating transmission of the first PDCCH and msg2.

In one possible implementation, step 506 may also be performed without performing step 504. And when the source access network equipment receives the third information sent by all the non-group-head UEs, the source access network equipment sends the second information to the target access network equipment. Fig. 5 is performed as an example in both step 504 and step 506.

In the embodiment of the present application, after receiving the second information, the target access network device executes step 508.

508. The target access network device broadcasts a first PDCCH scrambled by a first RA-RNTI. Accordingly, the group head UE and the non-group head UE may receive a first PDCCH scrambled by the first RA-RNTI, which is broadcast by the target access network device.

509. And descrambling the first PDCCH by the non-group-head UE based on the first RA-RNTI to obtain the scheduling information of the msg2.

510. The target access network device broadcasts msg2 over the first beam. Accordingly, the group head UE and the non-group head UE may receive msg2 broadcasted by the target access network device through the first beam based on the scheduling information of msg2 in the first PDCCH.

The descriptions of steps 508 to 510 may be referred to the description of the embodiment described in fig. 4, and are not repeated herein.

It can be seen that, based on the method described in fig. 5, it is beneficial to avoid that the target access network device sends the first PDCCH and msg2 prematurely, so that the non-group-head UE cannot successfully receive the first PDCCH and msg2.

Referring to fig. 6, fig. 6 is a flowchart of an information transmission method according to an embodiment of the present application. The embodiment depicted in fig. 6 is a modification of the embodiment depicted in fig. 5. In the embodiment depicted in fig. 6, the source access network device may inform which UE is a group head UE and which UE is a non-group head UE, so that the group head UE and the non-group head UE perform corresponding operations. In fig. 6, the group head UE, the non-group head UE, the source access network device, and the target access network device are taken as the execution bodies of the method as an example, and the application is not limited to the execution bodies of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 6 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

601. The source access network device sends a group switch request to the target access network device. Accordingly, the target access network device may receive the set of handover requests.

The group switching request is used for requesting cell switching of the UE group, and the group switching request carries the identification of the group head UE. That is, the group switch request may indicate to the target access network device which UE is the group head UE.

Optionally, the identity of the group head UE may be a cell radio network temporary identity (cell radio network temporary identifier, C-RNTI) of the group head UE. Alternatively, the identifier of the group head UE may be other information that may represent the group head UE.

By indicating the group head UE to the target access network device, the subsequent target access network device can only recognize whether the msg1 is sent by the group head UE after receiving the msg 1. If the msg1 is sent by the group head UE, the target access network device sends first information to the source access network device.

602. The target access network device sends a handover confirmation message to the source access network device. Accordingly, the source access network device may receive the handover confirmation information.

603. The source access network device sends a first command to the group head UE. Accordingly, the group head UE may receive the first command.

604. The source access network device sends a second command to the non-group-head UE. Accordingly, the non-head-of-group UE may receive the second command.

In one possible implementation, the first command and the second command each carry an identification of the head UE. Alternatively, the first command and the second command may be the same.

In another possible implementation, the first command carries information indicating that the UE receiving the first command is a group head UE, and the second command carries information indicating that the UE receiving the second command is a non-group head UE. Alternatively, the names of the first command and the second command may be the same, and both carry the first cell. The first cell in the first command is used to indicate that the UE that received the first command is a non-group-head UE. The first cell in the second command is used to indicate that the UE receiving the second command is a non-group-head UE. The value of the first cell in the first command is different from the value of the first cell in the second command. For example, the value of the first cell in the first command is 1, and the value of the first cell in the second command is 0. Alternatively, the value of the first cell in the first command is 0 and the value of the first cell in the second command is 1.

In yet another possible implementation, the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is information of a group head UE, and the second command indicates that the UE receiving the second command is information of a non-group head UE. That is, by transmitting different names of commands to different types of UEs, it is indicated whether the UE receiving the command is a group head UE.

In one possible implementation, the first command and the second command indicate a cell handover. That is, the first command and the second command may be a handover command. Based on the possible implementation manner, the first command and the second command are used for both cell handover and indication of the non-group-head UE, so that additional signaling can be avoided, and signaling overhead can be saved.

In another possible implementation, the first command and the second command may not be handover commands.

605. The group head UE adopts a first wave beam to send msg1 to target access network equipment. Accordingly, the target access network device may receive the msg1 transmitted by the group head UE using the first beam.

Wherein the msg1 includes a preamble. msg1 is used for random access.

606. The target access network device sends first information to the source access network device. Accordingly, the source access network device may receive the first information.

607. The source access network device sends first information to the non-group-head UE. Accordingly, the non-head-of-group UE may receive the first information.

608. The source access network device starts a timer.

609. The non-group head UE determines a first RA-RNTI and a first beam based on the first information.

610. The non-group head UE sends third information to the source access network device, the third information indicating that the non-group head UE has received the first information. Accordingly, the source access network device may receive the third information.

In the embodiment of the application, after receiving the first information, the non-group-head UE sends third information to the source access network equipment.

611. When the timer expires or third information sent by all non-group head UEs is received, the source access network device sends second information to the target access network device, wherein the second information indicates to send the first PDCCH and the msg2. Accordingly, the target access network device may receive the second information. After the target access network device receives the second information, step 612 is performed.

612. The target access network device broadcasts a first PDCCH scrambled by a first RA-RNTI. Accordingly, the group head UE and the non-group head UE may receive a first PDCCH scrambled by the first RA-RNTI, which is broadcast by the target access network device.

613. And descrambling the first PDCCH by the non-group-head UE based on the first RA-RNTI to obtain the scheduling information of the msg2.

614. The target access network device broadcasts msg2 over the first beam. Accordingly, the group head UE and the non-group head UE may receive msg2 broadcasted by the target access network device through the first beam based on the scheduling information of msg2 in the first PDCCH.

The descriptions of steps 605 to 614 may be referred to the descriptions in the embodiments described in fig. 4 and 5, and are not repeated herein.

In one possible implementation, steps 608, 610 and 611 in fig. 6 may not be performed. Fig. 6 exemplifies the execution of step 608, step 610 and step 611.

It can be seen that based on the method described in fig. 6, which UE is the head UE can be accurately notified through the first command and the second command, so that the head UE and the non-head UE can perform corresponding operations.

Referring to fig. 7, fig. 7 is a flowchart of another information transmission method according to an embodiment of the present application. The method depicted in fig. 7 is a solution in parallel with the method depicted in fig. 4. In fig. 7, the target access network device may broadcast TA information of the group-headed UEs in the UE group and uplink resource allocation information of all non-group-headed UEs in the UE group based on the G-RNTI. Thus, the non-group head UE may receive TA information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group based on the G-RNTI. In fig. 7, the group head UE, the non-group head UE, the source access network device, and the target access network device are taken as the execution bodies of the method as an example, and the application is not limited to the execution bodies of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 7 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

701. The group head UE adopts a first wave beam to send msg1 to target access network equipment. Accordingly, the target access network device may receive the msg1 transmitted by the group head UE using the first beam.

The description of step 701 may refer to the description of step 401, which is not repeated herein.

702. The target access network device broadcasts msg2 over the first beam. Accordingly, the group head UE may receive msg2 using the first beam based on the scheduling information of msg2.

In the embodiment of the present application, after receiving msg1, the target access network device may also broadcast a second PDCCH, where the second PDCCH carries scheduling information of msg2. After broadcasting the second PDCCH, the target access network device broadcasts msg2 over the first beam.

703. The target access network device broadcasts a first PDCCH. Accordingly, the non-group head UE may receive the first PDCCH.

The first PDCCH is scrambled by the G-RNTI of the UE group, and the first PDCCH is used for bearing scheduling information of the first information. The first information includes TA information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group.

Each cell group corresponds to a G-RNTI, which is used to distinguish cell groups. Therefore, the first PDCCH can be scrambled through the G-RNTI, so that only the UE in the cell group corresponding to the G-RNTI can successfully descramble the first PDCCH to obtain the scheduling information of the first information. And the non-group-head UE in the cell group corresponding to the G-RNTI can receive the first information broadcast by the target access network equipment based on the scheduling information of the first information.

704. And descrambling the first PDCCH by the non-group-head UE based on the G-RNTI to obtain scheduling information of the first information.

In the embodiment of the application, after receiving the first PDCCH, the non-group-head UE descrambles the first PDCCH based on the G-RNTI to obtain the scheduling information of the first information so as to receive the first information based on the scheduling information of the first information.

705. The target access network device broadcasts the first information. Accordingly, the non-group-head UE receives first information broadcast by the target access network device based on the scheduling information of the first information in the first PDCCH.

It can be seen that, based on the method described in fig. 7, the target access network device may broadcast the TA information of the group-headed UEs in the UE group and the uplink resource allocation information of all non-group-headed UEs in the UE group based on the G-RNTI. Thus, the non-group head UE may receive TA information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group based on the G-RNTI. Therefore, based on the method described in fig. 7, it is beneficial for the non-group-head UE to accurately receive TA information of the group-head UE and uplink resource allocation information of the non-group-head UE.

Referring to fig. 8, fig. 8 is a flowchart of an information transmission method according to an embodiment of the present application. The embodiment depicted in fig. 8 is a modification of the embodiment depicted in fig. 7. In the embodiment depicted in fig. 6, the source access network device may inform which UE is a group head UE and which UE is a non-group head UE, so that the group head UE and the non-group head UE perform corresponding operations. In fig. 8, a group head UE, a non-group head UE, a source access network device, and a target access network device are taken as an execution body of the method as an example, and the present application is not limited to the execution body of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 8 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

801. The source access network device sends a group switch request to the target access network device. Accordingly, the target access network device may receive the set of handover requests.

The group switching request is used for requesting cell switching of the UE group, and the group switching request carries an identifier of a group head UE in the UE group and a G-RNTI of the UE group. That is, the group switch request may indicate to the target access network device which UE is the group head UE.

Alternatively, the identity of the group head UE may be a C-RNTI of the group head UE. Alternatively, the identifier of the group head UE may be other information that may represent the group head UE.

The target access network device may then scramble the first PDCCH based on the G-RNTI by indicating the G-RNTI of the UE group to the target access network device.

802. The target access network device sends a handover confirmation message to the source access network device. Accordingly, the source access network device may receive the handover confirmation information.

803. The source access network device sends a first command to the group head UE. Accordingly, the group head UE may receive the first command.

804. The source access network device sends a second command to the non-group-head UE. Accordingly, the non-head-of-group UE may receive the second command.

Wherein the second command carries the G-RNTI of the UE group. The G-RNTI of the UE group is indicated by the second command so that the first PDCCH may be subsequently descrambled based on the G-RNTI.

805. The group head UE adopts a first wave beam to send msg1 to target access network equipment. Accordingly, the target access network device may receive the msg1 transmitted by the group head UE using the first beam.

806. The target access network device broadcasts msg2 over the first beam. Accordingly, the group head UE may receive msg2 using the first beam based on the scheduling information of msg2.

807. The target access network device broadcasts a first PDCCH. Accordingly, the non-group head UE may receive the first PDCCH.

The first PDCCH is scrambled by a group mobile user temporary identity (G-RNTI) of the UE group, and the first PDCCH is used for carrying scheduling information of the first information. The first information includes Timing Advance (TA) information of the group head UE and uplink resource allocation information of all non-group head UEs within the UE group.

808. And descrambling the first PDCCH by the non-group-head UE based on the G-RNTI to obtain scheduling information of the first information.

809. The target access network device broadcasts the first information. Accordingly, the non-group-head UE receives first information broadcast by the target access network device based on the scheduling information of the first information in the first PDCCH.

The descriptions of steps 805 to 809 can be referred to the description in the embodiment described in fig. 7, and are not repeated here.

It can be seen that based on the method described in fig. 8, which UE is the head UE can be accurately notified through the first command and the second command, so that the head UE and the non-head UE can perform corresponding operations.

Referring to fig. 9, fig. 9 is a flowchart of an information transmission method according to an embodiment of the application. The method depicted in fig. 9 is a solution that is juxtaposed to the methods depicted in fig. 4 and 7. In fig. 9, the target access network device may send TA information of the group head UE and uplink resource allocation information of all non-group head UEs to the source access network device, and the source access network device sends the TA information of the group head UE and the uplink resource allocation information of the non-group head UE to the non-group head UEs. In fig. 9, a group head UE, a non-group head UE, a source access network device, and a target access network device are taken as examples of the execution bodies of the method, and the present application is not limited to the execution bodies of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 9 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

901. the group head UE adopts a first wave beam to send msg1 to target access network equipment. Accordingly, the target access network device may receive the msg1 transmitted by the group head UE using the first beam.

902. The target access network device broadcasts msg2 using the first beam. Accordingly, the group head UE may receive msg2 using the first beam based on the scheduling information of msg2.

903. The target access network equipment sends first information to the source access network equipment, wherein the first information comprises TA information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group. Accordingly, the source access network device may receive the first information.

904. And the source access network equipment sends TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE. Accordingly, the non-group-head UE may receive TA information of the group-head UE and uplink resource allocation information of the non-group-head UE, which are sent by the source access network device.

In the embodiment of the application, after receiving the first information, the source access network device sends TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE.

In one possible implementation, the source access network device may send TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE in one of the following two manners.

Mode one: and the source access network equipment sends TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE through the RRC message. Accordingly, the non-group-head UE in the UE group receives TA information of the group-head UE in the UE group and uplink resource allocation information of the non-group-head UE, which are sent by the source access network equipment through the RRC message.

Mode two: the source access network equipment broadcasts a first PDCCH, wherein the first PDCCH is scrambled by a G-RNTI of a UE group, and the first PDCCH is used for bearing scheduling information of first information; the source access network device broadcasts the first information. Correspondingly, the non-group-head UE receives a first PDCCH broadcasted by source access network equipment; the non-group head UE uses the G-RNTI to descramble the first PDCCH to obtain scheduling information of the first information; the non-group head UE receives first information broadcast by the source access network equipment based on the scheduling information of the first information in the first PDCCH.

Each cell group corresponds to a G-RNTI, which is used to distinguish cell groups. Therefore, the first PDCCH can be scrambled through the G-RNTI, so that only the UE in the cell group corresponding to the G-RNTI can successfully descramble the first PDCCH to obtain the scheduling information of the first information. And the non-group-head UE in the cell group corresponding to the G-RNTI can receive the first information broadcast by the source access network equipment based on the scheduling information of the first information.

As can be seen, based on the method described in fig. 9, the target access network device may send TA information of the group head UE and uplink resource allocation information of all non-group head UEs to the source access network device, and the source access network device sends the TA information of the group head UE and the uplink resource allocation information of the non-group head UE to the non-group head UEs. Therefore, based on the method described in fig. 9, it is advantageous for the non-group-head UE to accurately receive TA information of the group-head UE and uplink resource allocation information of the non-group-head UE.

Referring to fig. 10, fig. 10 is a flowchart of an information transmission method according to an embodiment of the present application. The embodiment depicted in fig. 10 is a modification of the embodiment depicted in fig. 9. In the embodiment depicted in fig. 9, the source access network device may inform which UE is a group head UE and which UE is a non-group head UE, so that the group head UE and the non-group head UE perform corresponding operations. In fig. 10, a group head UE, a non-group head UE, a source access network device, and a target access network device are taken as an execution body of the method as an example, and the present application is not limited to the execution body of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 10 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

1001. The source access network device sends a group switch request to the target access network device. Accordingly, the target access network device may receive the set of handover requests.

The group switching request is used for requesting cell switching of the UE group, and the group switching request carries the identification of the group head UE in the UE group. That is, the group switch request may indicate to the target access network device which UE is the group head UE.

1002. The target access network device sends a handover confirmation message to the source access network device. Accordingly, the source access network device may receive the handover confirmation information.

1003. The source access network device sends a first command to the group head UE. Accordingly, the cluster head UE may receive the first command.

1004. The source access network device sends a second command to the non-group-head UE. Accordingly, the non-head-of-group UE may receive the second command.

1005. The group head UE adopts a first wave beam to send msg1 to target access network equipment. Accordingly, the target access network device may receive the msg1 transmitted by the group head UE using the first beam.

1006. The target access network device broadcasts msg2 using the first beam. Accordingly, the group head UE may receive msg2 using the first beam based on the scheduling information of msg2.

1007. The target access network equipment sends first information to the source access network equipment, wherein the first information comprises TA information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group. Accordingly, the source access network device may receive the first information.

1008. And the source access network equipment sends TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE. Accordingly, the non-group-head UE may receive TA information of the group-head UE and uplink resource allocation information of the non-group-head UE, which are sent by the source access network device.

The descriptions of steps 1005 to 1008 can be referred to the description of the embodiment described in fig. 9, and are not repeated here.

It can be seen that based on the method described in fig. 10, which UE is the head UE can be accurately notified through the first command and the second command, so that the head UE and the non-head UE can perform corresponding operations.

Referring to fig. 11, fig. 11 is a flowchart of an information transmission method according to an embodiment of the present application. In fig. 11, a group head UE, a non-group head UE, a source access network device, and a target access network device are taken as examples of the execution bodies of the method, and the present application is not limited to the execution bodies of the method. For example, the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device in fig. 11 may also be a chip, a chip system, or a processor supporting the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device to implement the method, or may be a logic module or software capable of implementing all or part of the functions of the cluster head UE, the non-cluster head UE, the source access network device, or the target access network device. Wherein:

1101. The source access network device sends a first command to a group head UE in the UE group. Accordingly, the cluster head UE may receive the first command.

1102. The source access network device sends a second command to non-group head UEs in the UE group. Accordingly, the non-head-of-group UE may receive the second command.

Based on the method described in fig. 11, which UE is the head UE can be accurately notified through the first command, so that the head UE can perform the corresponding operation, and which UEs are the non-head UEs can be accurately notified through the second command, so that the non-head UE can perform the corresponding operation.

Fig. 12 is a flowchart of a UE group determining method according to an embodiment of the present application. In fig. 12, the source access network device is taken as an example of the implementation subject of the method, and the implementation subject of the method is not limited by the present application. For example, the source access network device in fig. 12 may also be a chip, a system-on-chip, or a processor that supports the source access network device to implement the method, or may be a logic module or software that can implement all or part of the functionality of the source access network device. Wherein:

1201. the source access network device receives measurement reports for a plurality of UEs.

Optionally, the neighbor cell signal quality and/or the serving cell signal quality may be included in the measurement report.

1202. The source access network device determines a plurality of second UEs from the plurality of UEs based on measurement reports of the plurality of UEs, wherein the measurement reports corresponding to the second UEs indicate that the signal quality of the neighbor cell is higher than the signal quality of the serving cell by a first threshold, or the signal quality of the serving cell is lower than a second threshold and the signal quality of the neighbor cell is higher than a third threshold.

For example, the source access network device receives measurement reports reported by UE1 to UE 5. The measurement reports corresponding to UE 1-UE 4 indicate that the neighbor cell signal quality is higher than the serving cell signal quality by a first threshold, or that the serving cell signal quality is lower than a second threshold and the neighbor cell signal quality is higher than a third threshold. The measurement report corresponding to the UE5 indicates that the signal quality of the neighboring cell is less than or equal to the first threshold compared to the signal quality of the serving cell, or that the signal quality of the serving cell is greater than or equal to the second threshold and the signal quality of the neighboring cell is less than the third threshold. Then the second UE includes UEs 1-4.

1203. The source access network device determines whether to divide the plurality of second UEs into one UE group based on the locations of the plurality of second UEs.

In the embodiment of the present application, after the source access network device determines the plurality of second UEs, it determines whether to divide the plurality of second UEs into one UE group based on the positions of the plurality of second UEs.

In one possible implementation, the source access network device may determine the location of the second UE based on the best beam and TA information corresponding to the second UE. Based on this possible implementation, the location of the second UE can be accurately determined.

In one possible implementation, the source access network device determines whether to divide the plurality of second UEs into one UE group based on the locations of the plurality of second UEs, where the specific implementation is:

If the degree of dispersion among the positions of the plurality of second UEs is less than or equal to a fourth threshold, dividing the plurality of second UEs into a UE group; if the degree of dispersion between the locations of the plurality of second UEs is greater than the fourth threshold, the plurality of second UEs are not divided into one UE group.

The location between UEs is highly discrete, and they are considered to be far apart, which is not suitable for the group handover technique. Therefore, based on this possible implementation, the UE groups that need to be cell switched can be reasonably divided.

In one possible implementation, the position of the cluster head UE is closest to the center position of the UE cluster in the UE cluster.

In the method described in fig. 12, each UE reports a measurement report to a source access network device, and the source access network device divides a UE group that needs to perform cell handover based on the measurement reports reported by a plurality of UEs, and selects a group head UE. Fig. 12 is applicable to a scenario in which a UE of a passenger on a vehicle (e.g., a bus or subway) communicates with an access network device outside the vehicle.

Alternatively, fig. 12 may be combined with the methods described in fig. 4-11. I.e. the source access network device in fig. 4-11 may also perform the steps in fig. 12.

It can be seen that based on the method described in fig. 12, the UE groups that need to be cell switched can be accurately divided.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus shown in fig. 13 may be used to perform some or all of the functions of the non-head-set UE in the above-described method embodiment. The device can be a non-group-head UE, a device in the non-group-head UE or a device which can be matched with the non-group-head UE for use. The communication device may also be a chip system. The communication apparatus shown in fig. 13 may include a communication unit 1301 and a processing unit 1302. The processing unit 1302 is configured to perform data processing. The communication unit 1301 integrates a receiving unit and a transmitting unit. The communication unit 1301 may also be referred to as a transceiving unit. Alternatively, the communication unit 1301 may be split into a receiving unit and a transmitting unit. Wherein:

a communication unit 1301, configured to receive first information sent by a source access network device, where the first information is used to determine a first random access radio network temporary identifier (RA-RNTI) and a first beam, where the first RA-RNTI is used to scramble a first Physical Downlink Control Channel (PDCCH), where the first PDCCH is used to carry scheduling information of a message (msg) 2, where the first beam is used to transmit msg1 and msg2, where the msg1 includes a preamble, and where the msg2 includes Time Advance (TA) information of a group head UE in a UE group and uplink resource allocation information of all UEs in the UE group;

A processing unit 1302 configured to determine a first RA-RNTI and a first beam based on the first information; a communication unit 1301, configured to receive a first PDCCH scrambled by a first RA-RNTI, which is broadcast by a target access network device; the processing unit 1302 is further configured to descramble the first PDCCH based on the first RA-RNTI to obtain scheduling information of msg 2; the communication unit 1301 is further configured to receive msg2 broadcasted by the target access network device through the first beam based on the scheduling information of msg2.

In one possible implementation, the manner in which the communication unit 1301 receives the first information sent by the source access network device is specifically: the first information transmitted by the source access network device through a Radio Resource Control (RRC) message is received.

In one possible implementation, the manner in which the communication unit 1301 receives the first information sent by the source access network device is specifically: receiving a second PDCCH broadcasted by source access network equipment, wherein the second PDCCH is scrambled by a G-RNTI of a UE group, and the second PDCCH is used for bearing scheduling information of the first information; descrambling the second PDCCH based on the G-RNTI of the UE group to obtain scheduling information of the first information; the scheduling information based on the first information receives first information broadcast by the source access network device.

In one possible implementation, the communication unit 1301 is further configured to, after receiving the first information sent by the source access network device, send third information to the source access network device, where the third information indicates that the non-group-head UE has received the first information.

In a possible implementation, the communication unit 1301 is further configured to receive, before receiving the first information sent by the source access network device, a second command sent by the source access network device; the second command carries the identifier of the group head UE; or the second command carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the first command name sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus shown in fig. 13 may be configured to perform some or all of the functions of the source access network device in the above-described method embodiment. The device may be a source access network device, a device in the source access network device, or a device that can be used in a matching manner with the source access network device. The communication device may also be a chip system. The communication apparatus shown in fig. 13 may include a communication unit 1301 and a processing unit 1302. The processing unit 1302 is configured to perform data processing. The communication unit 1301 integrates a receiving unit and a transmitting unit. The communication unit 1301 may also be referred to as a transceiving unit. Alternatively, the communication unit 1301 may be split into a receiving unit and a transmitting unit. Wherein:

a communication unit 1301, configured to receive first information sent by a target access network device, where the first information is used to determine a first random access radio network temporary identifier (RA-RNTI) and a first beam, where the first RA-RNTI is used to scramble a first Physical Downlink Control Channel (PDCCH), where the first PDCCH is used to carry scheduling information of a message (msg) 2, where the first beam is used to transmit msg1 and msg2, where the msg1 includes a preamble, and where the msg2 includes Time Advance (TA) information of a group head UE in a UE group and uplink resource allocation information of all UEs in the UE group; the communication unit 1301 is further configured to send the first information to a non-group-head UE in the UE group.

In one possible implementation, the manner in which the communication unit 1301 sends the first information to the non-group-head UE in the UE group is specifically: the first information is transmitted to non-group-head UEs in the UE group through a Radio Resource Control (RRC) message.

In one possible implementation, the manner in which the communication unit 1301 sends the first information to the non-group-head UE in the UE group is specifically: broadcasting a second PDCCH, wherein the second PDCCH is scrambled by a group mobile user temporary identifier (G-RNTI) of the UE group, and the second PDCCH is used for bearing scheduling information of the first information; the first information is broadcast.

In one possible implementation, the processing unit 1302 is configured to start a timer after the communication unit 1301 sends the first information to the non-group-head UE in the UE group; the communication unit 1301 is further configured to send second information to the target access network device when the timer expires, where the second information indicates that the first PDCCH and msg2 are sent.

In one possible implementation, the communication unit 1301 is further configured to, after sending the first information to the non-group-head UEs in the UE group, send, when receiving third information sent by all the non-group-head UEs, second information to the target access network device, where the second information indicates that the first PDCCH and msg2 are sent, and the third information indicates that the non-group-head UE has received the first information.

In a possible implementation, the communication unit 1301 is further configured to, before receiving the first information sent by the target access network device, perform the following steps: transmitting a group switching request to target access network equipment, wherein the group switching request is used for requesting cell switching of a UE group, and the group switching request carries an identifier of a group head UE; receiving switching confirmation information sent by target access network equipment; sending a first command to a group head UE; sending a second command to the non-group head UE; the first command and the second command both carry the identifier of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE, and the second command carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus shown in fig. 13 may be configured to perform some or all of the functions of the target access network device in the above-described method embodiment. The device may be a target access network device, a device in the target access network device, or a device that can be matched with the target access network device for use. The communication device may also be a chip system. The communication apparatus shown in fig. 13 may include a communication unit 1301 and a processing unit 1302. The processing unit 1302 is configured to perform data processing. The communication unit 1301 integrates a receiving unit and a transmitting unit. The communication unit 1301 may also be referred to as a transceiving unit. Alternatively, the communication unit 1301 may be split into a receiving unit and a transmitting unit. Wherein:

a communication unit 1301 configured to receive a message (msg) 1 sent by a group head UE in a User Equipment (UE) group using a first beam, the msg1 including a preamble;

A communication unit 1301, configured to send first information to a source access network device, where the first information is used to determine a first random access radio network temporary identifier (RA-RNTI) and a first beam, where the first RA-RNTI is used to scramble a first Physical Downlink Control Channel (PDCCH), where the first PDCCH is used to carry scheduling information of msg2, where the msg2 includes Time Advance (TA) information of a group head UE and uplink resource allocation information of all UEs in the UE group; a communication unit 1301, configured to broadcast a first PDCCH scrambled with a first RA-RNTI; communication unit 1301 is also configured to broadcast msg2 over the first beam.

In one possible implementation, the communication unit 1301 is further configured to, before transmitting the first PDCCH scrambled by the first RA-RNTI, receive second information sent by the source access network device, the second information indicating that the first PDCCH and msg2 were transmitted.

In one possible implementation, the communication unit 1301 is further configured to, before receiving a message (msg) 1 sent by a group head UE in a group of User Equipments (UEs) using the first beam, perform the following steps: receiving a group switching request sent by source access network equipment, wherein the group switching request is used for requesting cell switching of a UE group, and the group switching request carries an identifier of a group head UE; and sending the switching confirmation information to the source access network equipment.

a communication unit 1301, configured to receive a first PDCCH scrambled by a group mobile user temporary identifier (G-RNTI) of a UE group, where the first PDCCH is broadcasted by a target access network device, and the first PDCCH is used to carry scheduling information of first information; the processing unit is used for descrambling the first PDCCH based on the G-RNTI to obtain scheduling information of the first information; the communication unit 1301 is further configured to receive first information broadcasted by the target access network device, where the first information includes Timing Advance (TA) information of a group-head UE in the UE group and uplink resource allocation information of all non-group-head UEs in the UE group, based on scheduling information of the first information.

In one possible implementation, the communication unit 1301 is further configured to receive a second command sent by the source access network device, where the second command carries a G-RNTI of the UE group; the second command also carries an identifier of the group head UE; or the second command also carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the signaling name of the first command sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

A communication unit 1301 configured to receive a message (msg) 1 sent by a group head UE in a User Equipment (UE) group using a first beam, the msg1 including a preamble; a communication unit 1301, configured to broadcast msg2 through the first beam; a communication unit 1301, configured to broadcast a first PDCCH, where the first PDCCH is scrambled by a group mobile user temporary identity (G-RNTI) of a UE group, and the first PDCCH is used to carry scheduling information of first information; the communication unit 1301 is further configured to broadcast first information, where the first information includes Time Advance (TA) information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group.

In one possible implementation, the communication unit 1301 is further configured to, before receiving a message (msg) 1 sent by a group head UE in a group of User Equipments (UEs) using the first beam, perform the following steps: receiving a group switching request sent by source access network equipment, wherein the group switching request is used for requesting cell switching of a UE group, and the group switching request carries an identifier of a group head UE and a G-RNTI of the UE group; and sending the switching confirmation information to the source access network equipment.

A communication unit 1301, configured to send a group handover request to a target access network device, where the group handover request is used to request cell handover for a UE group, where the group handover request carries an identifier of a group header UE in the UE group and a G-RNTI of the UE group; a communication unit 1301, configured to receive handover confirmation information sent by the target access network device; a communication unit 1301, configured to send a first command to a group head UE; a communication unit 1301, configured to send a second command to a non-group-head UE, where the second command carries a G-RNTI of the UE group; the first command and the second command also carry the identifier of the group head UE; or the first command also carries information for indicating that the UE receiving the first command is a group head UE, and the second command also carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

A communication unit 1301, configured to receive TA information of a group-head UE and uplink resource allocation information of a non-group-head UE in a UE group sent by a source access network device.

In one possible implementation, the manner in which the communication unit 1301 receives TA information of a group-head UE and uplink resource allocation information of a non-group-head UE in the UE group sent by the source access network device is specifically: and receiving TA information of the group head UE and uplink resource allocation information of the non-group head UE in the UE group sent by the source access network equipment through a Radio Resource Control (RRC) message.

In one possible implementation, the manner in which the communication unit 1301 receives TA information of a group-head UE and uplink resource allocation information of a non-group-head UE in the UE group sent by the source access network device is specifically:

receiving a first PDCCH broadcasted by source access network equipment, wherein the first PDCCH is scrambled by a group mobile user temporary identifier (G-RNTI) of a UE group, the first PDCCH is used for bearing scheduling information of first information, and the first information comprises Time Advance (TA) information of group head UE in the UE group and uplink resource allocation information of all non-group head UE in the UE group; descrambling the first PDCCH by using the G-RNTI to obtain scheduling information of the first information; the receiving source access network device broadcasts the first information based on the scheduling information of the first information.

In one possible implementation, the communication unit 1301 is further configured to receive a second command sent by the source access network device; the second command carries the identifier of the group head UE; or the second command carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the signaling name of the first command sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

A communication unit 1301, configured to receive first information sent by a target access network device, where the first information includes Time Advance (TA) information of a group-head UE in a User Equipment (UE) group and uplink resource allocation information of all non-group-head UEs in the UE group; communication unit 1301 is further configured to send TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE.

In one possible implementation, the manner in which the communication unit 1301 sends the TA information of the group head UE and the uplink resource allocation information of the non-group head UE to the non-group head UE is specifically: and sending TA information of the group head UE and uplink resource allocation information of the non-group head UE to the non-group head UE through a Radio Resource Control (RRC) message.

In one possible implementation, the manner in which the communication unit 1301 sends the TA information of the group head UE and the uplink resource allocation information of the non-group head UE to the non-group head UE is specifically: broadcasting a first PDCCH, wherein the first PDCCH is scrambled by a group mobile user temporary identifier (G-RNTI) of a UE group, and the first PDCCH is used for bearing scheduling information of first information; the first information is broadcast.

In one possible implementation, the communication unit 1301 is further configured to perform the following steps:

transmitting a group switching request to target access network equipment, wherein the group switching request is used for requesting cell switching of a UE group, and the group switching request carries an identifier of a group head UE in the UE group; receiving switching confirmation information sent by target access network equipment; sending a first command to a group head UE; sending a second command to the non-group head UE; the first command and the second command carry the identification of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE, and the second command carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

a communication unit 1301 configured to receive a message (msg) 1 sent by a group head UE in a User Equipment (UE) group using a first beam, the msg1 including a preamble; a communication unit 1301 configured to broadcast msg2 using the first beam; the communication unit 1301 is further configured to send first information to the source access network device, where the first information includes Time Advance (TA) information of the group head UE and uplink resource allocation information of all non-group head UEs in the UE group.

A communication unit 1301, configured to send a first command to a group head UE in a UE group; a communication unit 1301, configured to send a second command to a group head UE in the UE group; the first command and the second command carry the identification of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE, and the second command carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

A communication unit 1301, configured to receive a second command sent by a source access network device; the second command carries the identifier of the group head UE; or the second command carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the signaling name of the first command sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus shown in fig. 13 may be used to perform part or all of the functions of the cluster head UE in the above-described method embodiment. The device can be a group head UE, a device in the group head UE or a device which can be matched with the group head UE for use. The communication device may also be a chip system. The communication apparatus shown in fig. 13 may include a communication unit 1301 and a processing unit 1302. The processing unit 1302 is configured to perform data processing. The communication unit 1301 integrates a receiving unit and a transmitting unit. The communication unit 1301 may also be referred to as a transceiving unit. Alternatively, the communication unit 1301 may be split into a receiving unit and a transmitting unit. Wherein:

A communication unit 1301, configured to receive a first command sent by a source access network device; the first command carries an identifier of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE; or the signaling names of the first command and the second command sent by the source access network device to the non-group-head UE are different, the first command indicates that the UE receiving the first command is the information of the group-head UE, and the second command indicates that the UE receiving the second command is the information of the non-group-head UE.

A communication unit 1301 configured to receive measurement reports of a plurality of UEs; a processing unit 1302, configured to determine a plurality of second User Equipments (UEs) from the plurality of UEs based on measurement reports of the plurality of UEs, where the measurement report corresponding to the second UE indicates that the signal quality of the neighbor cell is higher than a first threshold or that the signal quality of the serving cell is lower than a second threshold and the signal quality of the neighbor cell is higher than a third threshold; the processing unit 1302 is further configured to determine whether to divide the plurality of second UEs into one UE group based on the locations of the plurality of second UEs.

In one possible implementation, the processing unit 1302 determines whether to divide the plurality of second UEs into one UE group based on the locations of the plurality of second UEs, including:

if the degree of dispersion of the positions of the plurality of second UEs is smaller than or equal to a fourth threshold, dividing the plurality of second UEs into a UE group; if the degree of dispersion of the positions of the plurality of second UEs is greater than the fourth threshold, the plurality of second UEs are not divided into one UE group.

In one possible implementation, the processing unit 1302 is further configured to determine a location of the second UE based on optimal beam and Time Advance (TA) information corresponding to the second UE.

Fig. 14 shows a schematic structure of a communication device. The communication apparatus 1400 may be a group head UE, a non-group head UE, a source access network device, or a target access network device in the above method embodiment, or may be a chip, a chip system, or a processor that supports the group head UE, the non-group head UE, the source access network device, or the target access network device to implement the above method. The communication device may be used to implement the method described in the above method embodiments, and reference may be made in particular to the description of the above method embodiments.

The communication device 1400 may include one or more processors 1401. The processor 1401 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminals, terminal chips, DUs or CUs, etc.), execute software programs, and process data of the software programs.

Optionally, the communication device 1400 may include one or more memories 1402 on which instructions 1404 may be stored, which may be executed on the processor 1401, to cause the communication device 1400 to perform the methods described in the method embodiments above. Optionally, the memory 1402 may also store data therein. The processor 1401 and the memory 1402 may be provided separately or may be integrated.

Optionally, the communication device 1400 may also include a transceiver 1405, an antenna 1406. The transceiver 1405 may be referred to as a transceiver unit, a transceiver circuit, or the like, for implementing a transceiver function. The transceiver 1405 may include a receiver, which may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function. The processing unit 1302 shown in fig. 13 may be the processor 1401. Communication unit 1301 may be transceiver 1405.

In another possible design, processor 1401 may include a transceiver to implement the receive and transmit functions. For example, the transceiver may be a transceiver circuit, or an interface circuit. The transceiver circuitry, interface or interface circuitry for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit, interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, interface or interface circuit may be used for transmitting or transferring signals.

In yet another possible design, the processor 1401 may have instructions 1403 stored thereon, where the instructions 1403 run on the processor 1401, which may cause the communication device 1400 to perform the method described in the method embodiments above. Instructions 1403 may be solidified in processor 1401, in which case processor 1401 may be implemented in hardware.

In yet another possible design, communication device 1400 may include circuitry that may perform the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in embodiments of the present application may be implemented on integrated circuits (integrated circuit, ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (application specific integrated circuit, ASIC), printed circuit boards (printed circuit board, PCB), electronic devices, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (Bipolar Junction Transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication apparatus described in the above embodiment may be a group head UE, a non-group head UE, a source access network device, or a target access network device, but the scope of the communication apparatus described in the embodiment of the present application is not limited thereto, and the structure of the communication apparatus may not be limited by fig. 14. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem;

(2) A set of one or more ICs, optionally including storage means for storing data, instructions;

(3) An ASIC, such as a modem (MSM);

(4) Modules that may be embedded within other devices;

(5) Receivers, terminals, smart terminals, cellular telephones, wireless devices, handsets, mobile units, vehicle devices, network devices, cloud devices, artificial intelligence devices, etc.;

(6) Others, and so on.

For the case where the communication device may be a chip or a chip system, reference may be made to the schematic structural diagram of the chip shown in fig. 15. The chip 1500 shown in fig. 15 includes a processor 1501 and an interface 1502. Optionally, a memory 1503 may also be included. Wherein the number of processors 1501 may be one or more, and the number of interfaces 1502 may be a plurality.

For the case that the chip is used to implement the functions of the group head UE, the non-group head UE, the source access network device or the target access network device in the embodiment of the present application:

the interface 1502 is configured to receive or output a signal;

the processor 1501 is configured to perform data processing operations of a group head UE, a non-group head UE, a source access network device, or a target access network device.

It can be understood that some optional features of the embodiments of the present application may be implemented independently in some scenarios, independent of other features, such as the scheme on which they are currently based, so as to solve corresponding technical problems, achieve corresponding effects, or may be combined with other features according to requirements in some scenarios. Accordingly, the communication device provided in the embodiment of the present application may also implement these features or functions accordingly, which will not be described herein.

It should be appreciated that the processor in embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The application also provides a computer readable medium having stored therein a computer program or instructions which, when executed by a communication device, implement the functions of any of the method embodiments described above.

The application also provides a computer program product comprising instructions which, when read and executed by a computer, cause the computer to carry out the functions of any of the method embodiments described above.

In the above embodiments, the implementation may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An information transmission method, the method comprising:

receiving first information sent by source access network equipment, wherein the first information is used for determining a first random access radio network temporary identifier RA-RNTI and a first wave beam, the first RA-RNTI is used for scrambling a first physical downlink control channel PDCCH, the first PDCCH is used for carrying scheduling information of a message msg2, the first wave beam is used for transmitting msg1 and msg2, the msg1 comprises a preamble, and the msg2 comprises time advance TA information of a group head UE in a UE group and uplink resource allocation information of all UEs in the UE group;

determining the first RA-RNTI and the first beam based on the first information;

receiving the first PDCCH scrambled by the first RA-RNTI broadcasted by target access network equipment;

Descrambling the first PDCCH based on the first RA-RNTI to obtain the scheduling information of the msg 2;

and receiving the msg2 broadcasted by the target access network equipment through the first wave beam based on the scheduling information of the msg2.

2. The method of claim 1, wherein the receiving the first information sent by the source access network device comprises:

and receiving the first information sent by the source access network equipment through a Radio Resource Control (RRC) message.

3. The method of claim 1, wherein the receiving the first information sent by the source access network device comprises:

receiving a second PDCCH broadcasted by the source access network equipment, wherein the second PDCCH is scrambled by a group mobile user temporary identifier G-RNTI of the UE group, and the second PDCCH is used for bearing scheduling information of the first information;

descrambling the second PDCCH based on the G-RNTI of the UE group to obtain scheduling information of the first information;

and receiving the first information broadcast by the source access network equipment based on the scheduling information of the first information.

4. A method according to any of claims 1-3, wherein after receiving the first information sent by the source access network device, the method further comprises:

And sending third information to the source access network equipment, wherein the third information indicates that the first information is received.

5. The method according to any one of claims 1-4, wherein the first information indicates one or more of the following information: the first RA-RNTI, physical random access channel PRACH resources corresponding to the preamble, an identity of the first beam, or an identity of a synchronization signal block SSB corresponding to the first beam.

6. The method according to any of claims 1-5, wherein prior to receiving the first information sent by the source access network device, the method further comprises:

receiving a second command sent by the source access network equipment;

wherein, the second command carries the identifier of the group head UE; or the second command carries information for indicating that the UE receiving the second command is a non-group-head UE; or the second command is different from the first command name sent to the group head UE by the source access network equipment, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

7. The method of claim 6, wherein the second command further carries a group mobile user temporary identity, G-RNTI, of the UE group.

8. The method according to claim 6 or 7, wherein the first command and the second command indicate a cell handover.

9. An information transmission method, the method comprising:

receiving first information sent by target access network equipment, wherein the first information is used for determining a first random access radio network temporary identifier (RA-RNTI) and a first wave beam, the first RA-RNTI is used for scrambling a first Physical Downlink Control Channel (PDCCH), the first PDCCH is used for carrying scheduling information of a message msg2, the first wave beam is used for transmitting msg1 and msg2, the msg1 comprises a preamble, and the msg2 comprises Time Advance (TA) information of a group head UE in a UE group and uplink resource allocation information of all UEs in the UE group;

and sending the first information to non-group head UE in the UE group.

10. The method of claim 9, wherein the sending the first information to non-group-head UEs in the group of UEs comprises:

and sending the first information to non-group-head UEs in the UE group through a Radio Resource Control (RRC) message.

11. The method of claim 9, wherein the sending the first information to non-group-head UEs in the group of UEs comprises:

broadcasting a second PDCCH, wherein the second PDCCH is scrambled by a group mobile user temporary identifier G-RNTI of the UE group, and the second PDCCH is used for bearing scheduling information of the first information;

broadcasting the first information.

12. The method according to any one of claims 9-11, wherein after the sending the first information to non-group-head UEs in the UE group, the method further comprises:

starting a timer;

and when the timer expires, transmitting second information to the target access network equipment, wherein the second information indicates that the first PDCCH and the msg2 are transmitted.

13. The method according to any one of claims 9-12, wherein after the sending the first information to non-group-head UEs in the UE group, the method further comprises:

and when receiving third information sent by all the non-group-head UEs, sending second information to the target access network equipment, wherein the second information indicates to send the first PDCCH and the msg2, and the third information indicates that the non-group-head UE has received the first information.

14. The method according to any one of claims 9 to 13, wherein the first information indicates one or more of the following information: the first RA-RNTI, physical random access channel PRACH resources corresponding to the preamble, an identity of the first beam, or an identity of a synchronization signal block SSB corresponding to the first beam.

15. The method according to any of claims 9-14, wherein prior to receiving the first information sent by the target access network device, the method further comprises:

transmitting a group switching request to the target access network equipment, wherein the group switching request is used for requesting cell switching of the UE group, and the group switching request carries the identifier of the group head UE;

receiving switching confirmation information sent by target access network equipment;

sending a first command to the group head UE;

sending a second command to the non-group head UE;

wherein, the first command and the second command both carry the identifier of the group head UE; or the first command carries information for indicating that the UE receiving the first command is a group head UE, and the second command carries information for indicating that the UE receiving the second command is a non-group head UE; or the signaling names of the first command and the second command are different, the first command indicates that the UE receiving the first command is the information of the group head UE, and the second command indicates that the UE receiving the second command is the information of the non-group head UE.

16. The method of claim 15, wherein the second command further carries a group mobile user temporary identity, G-RNTI, of the UE group.

17. The method according to claim 15 or 16, wherein the first command and the second command indicate a cell handover.

18. An information transmission method, the method comprising:

receiving a message msg1 sent by a group head UE in a user equipment UE group by using a first wave beam, wherein the msg1 comprises a preamble;

transmitting first information to source access network equipment, wherein the first information is used for determining a first random access radio network temporary identifier (RA-RNTI) and the first beam, the first RA-RNTI is used for scrambling a first Physical Downlink Control Channel (PDCCH), the first PDCCH is used for bearing scheduling information of msg2, and the msg2 comprises Time Advance (TA) information of the group head UE and uplink resource allocation information of all UEs in the UE group;

broadcasting the first PDCCH scrambled by the first RA-RNTI;

the msg2 is broadcast over the first beam.

19. The method of claim 18, wherein prior to the transmitting the first PDCCH scrambled by the first RA-RNTI, the method further comprises:

And receiving second information sent by the source access network device, wherein the second information indicates to send the first PDCCH and the msg2.

20. The method of claim 18 or 19, wherein the first information indicates one or more of the following information: the first RA-RNTI, physical random access channel PRACH resources corresponding to the preamble, an identity of the first beam, or an identity of a synchronization signal block SSB corresponding to the first beam.

21. The method according to any of claims 18-20, characterized in that before receiving the message msg1 sent by the group head UE in the group of user equipments UE using the first beam, the method further comprises:

receiving a group switching request sent by the source access network device, wherein the group switching request is used for requesting cell switching of the UE group, and the group switching request carries the identifier of the group head UE;

and sending switching confirmation information to the source access network equipment.

22. A communication device comprising means for performing the method of any one of claims 1 to 8, or comprising means for performing the method of any one of claims 9 to 17, or comprising means for performing the method of any one of claims 18 to 21.

23. A communication device comprising a processor and a memory, the processor and the memory being coupled, the processor being configured to implement the method of any one of claims 1-8, or the processor being configured to implement the method of any one of claims 9-17, or the processor being configured to implement the method of any one of claims 18-21.

24. A chip comprising a processor and an interface, the processor and the interface being coupled; the interface being for receiving or outputting signals, the processor being for executing code instructions to cause the method of any one of claims 1 to 8, or to cause the method of any one of claims 9 to 17, or to cause the method of any one of claims 18 to 21.

25. A computer readable storage medium having stored therein computer executable instructions which, when invoked by the computer, cause the computer to perform the method of any of the preceding claims 1-8, or cause the computer to perform the method of any of the preceding claims 9-17, or cause the computer to perform the method of any of the preceding claims 18-21.

26. A computer program product, the computer program product comprising: computer program code which, when run by a computer, causes the computer to perform the method of any one of claims 1 to 8, or causes the computer to perform the method of any one of claims 9 to 17, or causes the computer to perform the method of any one of claims 18 to 21.