Granted Patent B2

US 12,587,907 · App. 17/926,231 · Granted Mar 24, 2026

Inventors: Kun Cao (Shenzhen, CN); Lin Chen (Shenzhen, CN); Tao Qi (Shenzhen, CN); Liping Wang (Shenzhen, CN); Hao Zhu (Shenzhen, CN)

Assignee: ZTE CORPORATION

H04W36/0007H04W36/0061

Abstract

Claims (51)

1 . A handover method, applied to a first network device, comprising:

transmitting a handover request to a second network device, wherein the handover request carries Multicast Broadcast Service (MBS) session/bearer information; wherein the MBS session/bearer information comprises Quality of Service (QOS) configuration information of the MBS session/bearer currently received by a terminal, wherein the QoS configuration information is used to indicate each QoS flow in a QoS flow list mapped to a Radio Bearer (RB) corresponding to a MBS service that the terminal is receiving currently, which includes one or more QoS flow identities, QoS parameters of Qos flow level, and MBS session identity information; and

receiving a handover request response transmitted by the second network device, wherein the handover request response comprises at least one of the following:

MBS session/bearer information that can be accepted by the second network device, MBS session/bearer information that cannot be accepted by the second network device, terminal UE (User Equipment) scheduling configuration information of the second network device, or bearer configuration information of the second network device;

wherein the QoS configuration information is provided to the second network device in the handover request to enable the second network device to determine, for the terminal upon handover, whether to configure a bearer for the MBS session that is consistent with a bearer configuration used by the first network device,

wherein the MBS session/bearer information comprises at least one of the following:

the MBS session/bearer information that a terminal is interested in, the MBS session/bearer information currently received by the terminal, or terminal capability information, and

wherein the terminal capability information is used for indicating that: the terminal supports receiving a unicast service and an MBS session in the same time slot; or, the terminal does not support receiving the unicast service and the MBS session in the same time slot.

2 . The method according to claim 1 , wherein the MBS session information that the terminal is interested in comprises at least one of the following:

identity information of an MBS session that the terminal is interested in, an MBS area identity, receiving priority information, or the MBS session receiving mode information that the terminal expects.

3 . The method according to claim 2 , wherein the receiving priority information comprises at least one of the following:

priority of unicast reception, priority of broadcast/multicast reception, or priority of receiving the MBS session.

4 . The method according to claim 2 , wherein the identity information of the MBS session that the terminal is interested in comprises at least one of the following: an MBS session identity, a Temporary Mobile Group Identity (TMGI) of the MBS session, or a Protocol Data Unit (PDU) session identity indicating a broadcast/multicast session.

5 . The method according to claim 1 , wherein the MBS session/bearer information currently received by the terminal comprises at least one of the following:

identity information of the MBS session/bearer currently received by the terminal, receiving mode information of the MBS session/bearer currently received by the terminal, Radio Bearer (RB) configuration information of an MBS bearer currently received by the terminal.

6 . The method according to claim 5 , wherein the MBS session/bearer receiving mode information that the terminal expects comprises at least one of the following: Point to Point (PTP) reception, Point to Multipoint (PTM) reception, or PTP and PTM simultaneous reception; the receiving mode information of the MBS session/bearer currently received by the terminal comprises at least one of the following: PTP reception, PTM reception, or PTP and PTM simultaneous reception.

7 . The method according to claim 5 , wherein the RB configuration information comprises at least one of the following: PTP bearer configuration information or PTM bearer configuration information,

wherein the PTP bearer configuration information is used for configuring a PTP bearer, and the PTP bearer configuration information comprises at least one of the following:

a PTP RB identify, Service Data Adaptation Protocol (SDAP) configuration information, Packet Data Aggregation Protocol (PDCP) configuration information, or Radio Link Control (RLC) bearer configuration information;

the PTM bearer configuration information is used for configuring a PTM bearer, and the PTM bearer configuration information comprises at least one of the following:

a PTM RB identify, a logical channel identify, the SDAP configuration information, the PDCP configuration information, or the RLC bearer configuration information.

8 . The method according to claim 1 , wherein the MBS session/bearer information that can be accepted indicated in the handover request response comprises at least one of the following:

an MBS session/bearer identity that can be accepted by the second network device, a receiving mode of the broadcast/unicast service session, or Quality of Service (QOS) configuration information of the service session/bearer that can be accepted;

or, wherein the MBS session/bearer information that cannot be accepted indicated in the handover request response comprises at least one of the following:

an MBS session/bearer identity that cannot be accepted by the second network device, or a reason that the second network device cannot accept the MBS session/bearer corresponding to the MBS session/bearer identity;

or, wherein the bearer configuration information of the second network device comprises at least one of the following:

a Point to Multipoint (PTM) radio bearer identify, a logical channel identify, Service Data Adaptation Protocol (SDAP) configuration information, Packet Data Aggregation Protocol (PDCP) configuration information, or Radio Link Control (RLC) bearer configuration information;

or, wherein the UE scheduling configuration information of the second network device indicated in the handover request response comprises at least one of the following:

scheduling information of a multicast service channel, or physical layer parameters required for configuring the multicast service channel;

or, wherein the handover request response further comprises at least one of the following: System Information Block (SIB) configuration information of the second network device, multicast control channel configuration information, or multicast service channel configuration information;

or, wherein the transmitting a handover request to the second network device comprises:

transmitting the handover request to an Access and Mobility Management Function (AMF), and forwarding the handover request to the second network device through the AMF, wherein the handover request received by the second network device carries the MBS session/bearer information;

or, wherein the MBS session information is further used for indicating: MBS services corresponding to MBS sessions, wherein

the MBS sessions and the MBS services are in one-to-one correspondence.

9 . A handover method, applied to a second network device, comprising:

receiving a handover request transmitted by a first network device, wherein the handover request carries Multicast Broadcast Service (MBS) session/bearer information, the MBS session information is used for indicating an MBS session, and the MBS bearer information is used for indicating an MBS bearer, wherein the MBS session/bearer information comprises Quality of Service (Qos) configuration information of the MBS session/bearer currently received by a terminal, wherein the Qos configuration information is used to indicate each QoS flow in a QoS flow list mapped to a Radio Bearer (RB) corresponding to a MBS service that the terminal is receiving currently, which includes one or more QoS flow identities, QoS parameters of QoS flow level, and MBS session identity information; and

determining, using the QoS configuration information, whether to configure a bearer for the MBS session for the terminal that is consistent with a bearer configuration used by the first network device;

returning a handover response to the first network device according to the handover request, wherein the handover response is used for indicating at least one of the following: MBS session/bearer information that can be accepted by the second network device, MBS session/bearer information that cannot be accepted by the second network device, terminal UE (User Equipment) scheduling configuration information of the second network device, or bearer configuration information of the second network device,

wherein the MBS session/bearer information comprises at least one of the following:

the MBS session/bearer information that a terminal is interested in, the MBS session/bearer information currently received by the terminal, or terminal capability information, and

wherein the terminal capability information is used for indicating that: the terminal supports receiving a unicast service and an MBS session in the same time slot; or, the terminal does not support receiving the unicast service and the MBS session in the same time slot.

10 . The method according to claim 9 , wherein the MBS session/bearer information comprises at least one of the following:

the MBS session/bearer information that a terminal is interested in, the MBS session/bearer information currently received by the terminal, or terminal capability information.

11 . The method according to claim 10 , wherein the MBS session/bearer information that the terminal is interested in comprises at least one of the following:

identity information of the MBS session that the terminal is interested in, an MBS area identity, receiving priority information, or the MBS session/bearer receiving mode information that the terminal expects.

12 . The method according to claim 11 , wherein the receiving priority information comprises at least one of the following:

priority of unicast reception, priority of broadcast/multicast reception, or the priority of receiving an MBS session;

or, wherein the MBS session/bearer information currently received by the terminal comprises at least one of the following:

identity information of the MBS session/bearer currently received by the terminal, receiving mode information of the MBS session/bearer currently received by the terminal, Radio Bearer (RB) configuration information of an MBS bearer currently received by the terminal.

13 . A non-transitory computer-readable storage medium, storing a computer program, wherein the computer program is configured to implement the method of any one of claims 1-8 and 9-12 .

14 . An electronic apparatus, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to implement the method of any one of claims 1-8 and 9-12 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (30)