Information notification method, communication node, and storage medium

1 . An information notification method, the method being applied to a first communication node and comprising:

determining a position of a resource, wherein the resource is configured to send notification information which is configured to indicate that multicast control channel (MCCH) information is updated, the resource comprises at least a time domain resource and a frequency domain resource, the frequency domain resource is located in a downlink bandwidth part (BWP), the notification information is indicated by using a bitmap in downlink control information (DCI) of a physical downlink control channel (PDCCH), the bitmap indicates a MCCH which is updated, and the PDCCH is sent in a common search space in the downlink BWP; and

sending position information of the resource to a second communication node, and sending the notification information on the resource;

wherein the resource further comprises a beam resource, and the position of the resource further comprises a position of the beam resource;

wherein position information of the beam resource is indicated by using a transmission configuration indication (TCI) state and quasi co-location (QCL) information in RRC signaling, in a case where the RRC signaling comprises at least two TCI states, the position information of the beam resource is indicated by using one of the at least two TCI states activated by a media access control control element (MAC CE), and a reference signal corresponding to the QCL information is configured to receive the PDCCH in which the notification information is located.

2 . The method according to claim 1 , wherein the notification information and the updated MCCH information indicated by the notification information are located in a same modification period, and a cyclic redundancy check (CRC) of the PDCCH is scrambled by using a radio network temporary identity (RNTI) dedicated to the notification information.

3 . The method according to claim 1 , wherein the second communication node interested in receiving a multicast broadcast service (MBS) service reads the MCCH information at least once in each modification period.

4 . The method according to claim 1 , wherein the frequency domain resource being located in the downlink BWP comprises one of the following:

the frequency domain resource being located in an initial downlink BWP;

the frequency domain resource being located in a specific downlink BWP of the second communication node; or

the frequency domain resource being located in a default downlink BWP;

the initial downlink BWP is equal to bandwidth of a control resource set CORESET # 0 ; or, the initial downlink BWP is configured by radio resource control (RRC) signaling.

5 . The method according to claim 1 , wherein position information of the frequency domain resource is indicated by using a bitmap in RRC signaling, and the bitmap in the RRC signaling indicates a physical resource block (PRB) occupied by the notification information in the downlink BWP.

6 . The method according to claim 1 , wherein the time domain resource comprises a slot period, a slot offset, a slot number, a symbol offset, and a symbol number, wherein the symbol offset is indicated by using a bitmap.

7 . The method according to claim 1 , wherein the position information of the resource is indicated by using RRC signaling.

8 . An information notification method, the method being applied to a second communication node and comprising:

receiving position information of a resource sent by a first communication node, wherein the resource is configured to send notification information which is configured to indicate that multicast control channel (MCCH) information is updated, the resource comprises at least a time domain resource and a frequency domain resource, the frequency domain resource is located in a downlink bandwidth part (BWP), the notification information is indicated by using a bitmap in downlink control information (DCI) of a physical downlink control channel (PDCCH), the bitmap indicates a MCCH which is updated, and the PDCCH is sent in a common search space in the downlink BWP;

wherein the resource further comprises a beam resource, and a position of the resource further comprises a position of the beam resource;

wherein position information of the beam resource is indicated by using a transmission configuration indication (TCI) state and quasi co-location (QCL) information in RRC signaling, in a case where the RRC signaling comprises at least two TCI states, the position information of the beam resource is indicated by using one of the at least two TCI states activated by a media access control control element (MAC CE), and a reference signal corresponding to the QCL information is configured to receive the PDCCH in which the notification information is located.

9 . The method according to claim 8 , further comprising:

listening to the notification information sent by the first communication node at a position of the resource, wherein the listening is performed by using a radio network temporary identity (RNTI) dedicated to the notification information in the common search space in the downlink BWP; and

acquiring updated MCCH content in a same modification period according to the notification information.

10 . The method according to claim 8 , wherein the second communication node interested in receiving a multicast broadcast service (MBS) service reads the MCCH information at least once in each modification period.

11 . The method according to claim 8 , wherein the frequency domain resource being located in the downlink BWP, comprising one of the following:

the frequency domain resource being located in an initial downlink BWP;

the frequency domain resource being located in a specific downlink BWP of the second communication node; or

the frequency domain resource being located in a default downlink BWP;

the initial downlink BWP is equal to bandwidth of a control resource set CORESET #0; or,

the initial downlink BWP is configured by radio resource control (RRC) signaling.

12 . The method according to claim 8 , wherein position information of the frequency domain resource is indicated by using a bitmap in RRC signaling, and the bitmap in the RRC signaling indicates a physical resource block (PRB) occupied by the notification information in the downlink BWP.

13 . The method according to claim 8 , wherein the time domain resource comprises a slot period, a slot offset, a slot number, a symbol offset, and a symbol number, wherein the symbol offset is indicated by using a bitmap.

14 . The method according to claim 8 , wherein the position information of the resource is indicated by using RRC signaling.

15 . A communication node, comprising a processor, wherein

the processor is configured, when executing a computer program, to implement a information notification method,

wherein the information notification method comprises:

determining a position of a resource, wherein the resource is configured to send notification information which is configured to indicate that multicast control channel (MCCH) information is updated, the resource comprises at least a time domain resource and a frequency domain resource, the frequency domain resource is located in a downlink bandwidth part (BWP), the notification information is indicated by using a bitmap in downlink control information (DCI) of a physical downlink control channel (PDCCH), the bitmap indicates a MCCH which is updated, and the PDCCH is sent in a common search space in the downlink BWP; and

sending position information of the resource to a second communication node, and sending the notification information on the resource;

wherein the resource further comprises a beam resource, and the position of the resource further comprises a position of the beam resource;

wherein position information of the beam resource is indicated by using a transmission configuration indication (TCI) state and quasi co-location (QCL) information in RRC signaling, in a case where the RRC signaling comprises at least two TCI states, the position information of the beam resource is indicated by using one of the at least two TCI states activated by a media access control control element (MAC CE), and a reference signal corresponding to the QCL information is configured to receive the PDCCH in which the notification information is located.

16 . A non-transitory computer-readable storage medium storing a computer program which, when executed by a processor, implements the information notification method according to claim 1 .