Method of handover of MBS session, and system and apparatus thereof

1 . A wireless communication method for use in a target wireless network node, the method comprising:

receiving, from a network function, an area identifier of the target wireless network node in a multicast broadcast service (MBS) session during a handover of the MBS session to the target wireless network node, wherein the network function comprises a session management function; and

transmitting, to the session management function, a path switch request associated with the MBS session,

wherein the area identifier is received in a response of the path switch request.

2 . The wireless communication method of claim 1 ,

wherein the network function comprises a source wireless network node associated with the handover.

3 . The wireless communication method of claim 2 , further comprising:

receiving, from the source wireless network node, an area identifier of the source wireless network node.

4 . The wireless communication method of claim 1 , wherein the area identifier of the target wireless network node is received in a handover request.

5 . The wireless communication method of claim 1 , further comprising:

receiving, location information corresponding to the area identifier,

wherein the location information comprises at least one of a tracking area identity list associated with the area identifier, a cell list associated with the area identifier, a multicast address associated with the area identifier or a multicast address associated with the MBS session.

6 . The wireless communication method of claim 1 , further comprising:

transmitting, to a multicast broadcast session management function of the MBS session, a request for establishing a downlink tunnel of the MBS session, wherein the request comprises the area identifier of the target wireless network node.

7 . The wireless communication method of claim 6 , further comprising:

receiving, from the multicast broadcast session management function, a response comprising a multicast address associated with the area identifier or a multicast address associated with the MBS session.

8 . A wireless communication method for use in a session management function, the method comprising:

transmitting, to a target wireless network node, an area identifier of the target wireless network node in a multicast broadcast service (MBS) session during a handover of the MBS session to the target wireless network node; and

receiving, from the target wireless network node, a path switch request associated with the MBS session,

wherein the area identifier of the target wireless network node is transmitted in a response of the path switch request.

9 . The wireless communication method of claim 8 , wherein the area identifier of the target wireless network node is transmitted in a handover request.

10 . The wireless communication method of claim 8 , further comprising:

transmitting, to the target wireless network node, location information corresponding to the area identifier of the target wireless network node,

wherein the location information comprises at least one of a tracking area identity list associated with the area identifier, a cell list associated with the area identifier, a multicast address associated with area identifier or a multicast address associated with of the MBS session.

11 . The wireless communication method of claim 8 , further comprising:

receiving, from a multicast broadcast session management function, information of a correlation between each area identifier associated with the MBS session and corresponding location information,

wherein the location information comprises at least one of a tracking area identity list associated with the area identifier, a cell list associated with the area identifier, a multicast address associated with the area identifier or a multicast address associated with of the MBS session.

12 . A target wireless network node, comprising:

a communication unit, configured to:

receive, from a network function, an area identifier of the target wireless network node in a multicast broadcast service (MBS) session during a handover of the MBS session to the target wireless network node, wherein the network function comprises a session management function; and

transmit, to the session management function, a path switch request associated with the MBS session,

wherein the area identifier is received in a response of the path switch request.