Method and apparatus for random access indication

1 . A method for random access indication, comprising:

receiving, by a serving base station, a radio resource management (RRM) measurement report sent by a terminal, wherein the measurement report comprises a measurement report of at least one neighboring cell, the measurement report of the at least one neighboring cell comprises: measurement object information configured to indicate at least one of a receiving antenna panel or a receiving beam used by the terminal to obtain the measurement value of the at least one neighboring cell;

wherein, the measurement object information comprises:

an identifier of the receiving beam; or

a first reference signal identifier, wherein the first reference signal identifier is configured to indicate the receiving beam;

selecting by the serving base station a target cell from the at least one neighboring cell;

sending by the serving base station a handover request signaling to a target base station to which the target cell belongs, wherein the handover request signaling comprises the measurement report of the target cell;

receiving by the serving base station a handover response signaling sent by the target base station, wherein the handover response signaling comprises indication information of at least one of a target antenna panel or a target beam; and

sending, by the serving base station, a random access indication signaling to the terminal, the random access indication signaling configured to indicate to the terminal at least one of the target antenna panel or the target beam for sending a random access preamble,

in response to the random access indication signaling indicating the target beam, the target antenna panel corresponding to the target beam is determined by the terminal based on a mapping relationship between antenna panels and beams;

in response to the terminal having beam correspondence capability, the target antenna panel and the target beam are determined by the terminal as the transmitting antenna panel and transmitting beam corresponding to the receiving antenna panel and receiving beam with optimal downlink signal;

in response to the terminal not having beam correspondence capability, the target antenna panel and the target beam are determined by the target base station based on a measurement value corresponding to each uplink reference signal; and

in response to a radio link failure, the random access indication signaling isa radio link recovery instruction or a beam recovery instruction, wherein the radio link recovery instruction or the beam recovery instruction comprises indication information of a target antenna panel, enabling the terminal to initiate random access to the serving base station using the target antenna panel to perform radio link recovery or beam recovery;

wherein, the random access indication signaling further comprises: indication information of at least one of an antenna panel or a beam configured to monitor a random access response (RAR) after the terminal sends the random access preamble.

2 . The method of claim 1 , wherein, the random access indication signaling is a handover instruction, and the handover instruction is configured to instruct the terminal to hand over to the target cell.

3 . The method of claim 1 , wherein, the measurement report of the at least one neighboring cell further comprises: an identifier of the at least one neighboring cell, and a measurement value of the at least one neighboring cell.

4 . The method of claim 3 , wherein, the measurement object information further comprises:

an identifier of the receiving antenna panel; or,

a first reference signal group identifier, wherein the first reference signal group identifier is configured to indicate the receiving antenna panel; or,

the first reference signal identifier, wherein the first reference signal identifier is configured to indicate the receiving antenna panel.

5 . The method of claim 1 , wherein, the handover request signaling further comprises configuration information of an uplink reference signal for uplink measurement by the terminal.

6 . The method of claim 1 , further comprising:

receiving by the serving base station candidate panel information sent by the terminal, wherein the candidate panel information is configured to indicate at least one candidate antenna panel for random access;

sending by the serving base station the candidate panel information to the target base station;

wherein, the target antenna panel is selected from the at least one candidate antenna panel.

7 . The method of claim 1 , further comprising:

receiving by the serving base station a radio link failure notification or a beam failure notification sent by the terminal;

wherein, the radio link failure notification is configured to notify the serving base station of a base station antenna panel where a radio link failure occurs, and the beam failure notification is configured to notify the serving base station of a base station antenna panel where a beam failure occurs.

8 . The method of claim 1 , wherein, the random access indication signaling is a secondary cell adding instruction, the secondary cell adding instruction is configured to instruct the terminal to access a target secondary cell.

9 . The method of claim 8 , further comprising:

selecting by the serving base station the target secondary cell from the at least one neighboring cell.

10 . The method of claim 1 , wherein, the random access indication signaling comprises:

at least one of an identifier of the target antenna panel or an identifier of the target beam; or,

at least one of an identifier of the target antenna panel or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate the target beam; or,

at least one of a second reference signal group identifier or a second reference signal identifier, wherein the second reference signal group identifier is configured to indicate the target antenna panel, and the second reference signal identifier is configured to indicate the target beam; or,

a second reference signal identifier, wherein the second reference signal identifier is configured to indicate at least one of the target antenna panel or the target beam.

11 . A method for random access indication, comprising:

sending by a terminal a radio resource management (RRM) measurement report to a serving base station, wherein the measurement report comprises a measurement report of at least one neighboring cell, wherein, the measurement report of the at least one neighboring cell comprises: measurement object information, the measurement object information is configured to indicate at least one of a receiving antenna panel or a receiving beam used by the terminal to obtain the measurement value of the at least one neighboring cell;

receiving by the terminal a random access indication signaling; and

determining by the terminal at least one of a target antenna panel or a target beam for sending a random access preamble and at least one of an antenna panel or a beam configured to monitor a random access response (RAR) after the terminal sends the random access preamble based on the random access indication signaling;

wherein, the measurement object information comprises:

an identifier of the receiving beam; or

a first reference signal identifier, wherein the first reference signal identifier is configured to indicate the receiving beam;

in response to the random access indication signaling indicating the target beam, the terminal determines the target antenna panel corresponding to the target beam based on a mapping relationship between antenna panels and beams;

in response to the terminal having beam correspondence capability, the terminal determines the target antenna panel and the target beam as the transmitting antenna panel and transmitting beam corresponding to the receiving antenna panel and receiving beam with optimal downlink signal;

in response to the terminal not having beam correspondence capability, the target antenna panel and the target beam are determined by the target base station based on a measurement value corresponding to each uplink reference signal; and

in response to a radio link failure, the random access indication signaling is a radio link recovery instruction or a beam recovery instruction, wherein the radio link recovery instruction or the beam recovery instruction comprises indication information of a target antenna panel, the terminal initiates random access to the serving base station using the target antenna panel to perform radio link recovery or beam recovery.

12 . The method of claim 11 , wherein, the random access indication signaling is a handover instruction, and the handover instruction is configured to instruct the terminal to be handed over to a target cell.

13 . The method of claim 12 ,

wherein, the measurement report of the at least one neighboring cell further comprises: an identifier of the at least one neighboring cell, and a measurement value of the at least one neighboring cell.

14 . The method of claim 13 , further comprising:

sending by the terminal candidate panel information to the serving base station, wherein the candidate panel information indicates at least one candidate antenna panel for random access;

wherein, the target antenna panel is selected from the at least one candidate antenna panel.

15 . The method of claim 11 , the method further comprises:

sending by the terminal a radio link failure notification or a beam failure notification to a serving base station;

wherein, the radio link failure notification is configured to notify the serving base station of a base station antenna panel where a radio link failure occurs, and the beam failure notification is configured to notify the serving base station of a base station antenna panel where a beam failure occurs.

16 . The method of claim 11 , wherein, the random access indication signaling is a secondary cell adding instruction, the secondary cell adding instruction is configured to instruct the terminal to access a target secondary cell, the target secondary cell is selected from the at least one neighboring cell.

17 . An apparatus for random access indication, applied to a terminal, the apparatus comprising:

a processor; and

a memory configured to store instructions executable by the processor;

wherein, the processor is configured to:

send a radio resource management (RRM) measurement report to a serving base station, wherein the measurement report comprises a measurement report of at least one neighboring cell, the measurement report of the at least one neighboring cell comprises: measurement object information, the measurement object information is configured to indicate at least one of a receiving antenna panel or a receiving beam used by the terminal to obtain the measurement value of the at least one neighboring cell,

wherein, the measurement object information comprises:

an identifier of the receiving beam; or,

a first reference signal identifier, wherein the first reference signal identifier is configured to indicate the receiving beam;

receive a random access indication signaling, the random access indication signaling configured to indicate to the terminal at least one of a target antenna panel or a target beam for sending a random access preamble; and

determine at least one of the target antenna panel or the target beam for sending a random access preamble and at least one of an antenna panel or a beam configured to monitor a random access response (RAR) after the terminal sends the random access preamble based on the random access indication signaling;

in response to the random access indication signaling indicating the target beam, determine the target antenna panel corresponding to the target beam is based on a mapping relationship between antenna panels and beams;

in response to the terminal having beam correspondence capability, determine the target antenna panel and the target beam as the transmitting antenna panel and transmitting beam corresponding to the receiving antenna panel and receiving beam with optimal downlink signal;

in response to the terminal not having beam correspondence capability, the target antenna panel and the target beam are determined by the target base station based on a measurement value corresponding to each uplink reference signal; and

in response to a radio link failure, the random access indication signaling is a radio link recovery instruction or a beam recovery instruction, wherein the radio link recovery instruction or the beam recovery instruction comprises indication information of a target antenna panel, initiate random access to the serving base station using the target antenna panel to perform radio link recovery or beam recovery.