METHOD AND DEVICE FOR MULTICAST/BROADCAST SERVICE-RELATED OPERATIONS
Methods and devices for Multicast/Broadcast Service (MBS)-related operations are provided. The method includes receiving a Radio Resource Control (RRC) release message from a Base Station (BS), the RRC release message including a suspending configuration indicating that the UE is allowed to receive, in an RRC_INACTIVE state, data of an MBS Radio Bearer (MRB) associated with a multicast session; transitioning to the RRC_INACITVE state in response to receiving the RRC release message; and receiving the data of the MRB after transitioning to the RRC_INACTIVE state.
1 . A method performed by a User Equipment (UE) for Multicast/Broadcast Service (MBS)-related operations, the method comprising:
receiving a Radio Resource Control (RRC) release message from a Base Station (BS), the RRC release message comprising a suspending configuration indicating that the UE is allowed to receive, in an RRC_INACTIVE state, data of an MBS Radio Bearer (MRB) associated with a multicast session;
transitioning to the RRC_INACITVE state in response to receiving the RRC release message; and
receiving the data of the MRB after transitioning to the RRC_INACTIVE state.
2 . The method of claim 1 , further comprising:
receiving deactivation signaling from the BS, the deactivation signaling indicating that the multicast session associated with the MRB is to be deactivated; and
stopping receiving the data of the MRB in response to receiving the deactivation signaling.
3 . The method of claim 2 , further comprising:
receiving activation signaling from the BS after stopping receiving the data of the MRB, the activation signaling indicating that the multicast session associated with the MRB is to be activated; and
resuming reception of the data of the MRB in response to receiving the activation signaling.
4 . The method of claim 3 , wherein receiving the activation signaling from the BS comprises:
receiving a paging message from the BS, the paging message comprising a Temporary Mobile Group Identity (TMGI) associated with the multicast session.
5 . The method of claim 1 , further comprising:
joining a multicast session associated with the MRB before receiving the data of the MRB.
6 . The method of claim 1 , further comprising:
refraining from transmitting a Hybrid Automatic Repeat Request (HARM) feedback corresponding to the data of the MRB.
7 . The method of claim 1 , further comprising:
transmitting a capability report to the BS, the capability report indicating that the UE supports receiving the data of the MRB in the RRC_INACTIVE state.
8 . The method of claim 1 , wherein receiving the data of the MRB comprises:
applying a Group Radio Network Temporary Identifier (G-RNTI) to receive the data of the MRB.
9 . A User Equipment (UE) for Multicast/Broadcast Service (MBS)-related operations, the UE comprising:
at least one processor; and
at least one memory coupled to the at least one processor, the at least one memory storing one or more computer-executable instructions that, when executed by the at least one processor, cause the UE to:
receive a Radio Resource Control (RRC) release message from a Base Station (BS), the RRC release message comprising a suspending configuration indicating that the UE is allowed to receive in an RRC_INACTIVE state, data of an MBS Radio Bearer (MRB) associated with a multicast session;
transition to the RRC_INACITVE state in response to receiving the RRC release message; and
receive the data of the MRB after transitioning to the RRC_INACTIVE state.
10 . The UE of claim 9 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
receive deactivation signaling from the BS, the deactivation signaling indicating that the multicast session associated with the MRB is to be deactivated; and
stop receiving the data of the MRB in response to receiving the deactivation signaling.
11 . The UE of claim 10 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
receive activation signaling from the BS after stopping receiving the data of the MRB, the activation signaling indicating that the multicast session associated with the MRB is to be activated; and
resume reception of the data of the MRB in response to receiving the activation signaling.
12 . The UE of claim 11 , wherein receiving the activation signaling from the BS comprises:
receiving a paging message from the BS, the paging message comprising a Temporary Mobile Group Identity (TMGI) associated with the multicast session.
13 . The UE of claim 9 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
join a multicast session associated with the MRB before receiving the data of the MRB.
14 . The UE of claim 9 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
refrain from transmitting a Hybrid Automatic Repeat Request (HARM) feedback corresponding to the data of the MRB.
15 . The UE of claim 9 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
transmit a capability report to the BS, the capability report indicating that the UE supports receiving the data of the MRB in the RRC_INACTIVE state.
16 . The UE of claim 9 , wherein receiving the data of the MRB comprises:
applying a Group Radio Network Temporary Identifier (G-RNTI) to receive the data of the MRB.
17 . A Base Station (BS) for Multicast/Broadcast Service (MBS)-related operations, the BS comprising:
at least one processor; and
at least one memory coupled to the at least one processor, the at least one memory storing one or more computer-executable instructions that, when executed by the at least one processor, cause the BS to:
transmit a Radio Resource Control (RRC) release message to a User Equipment (UE), causing the UE to transition to an RRC_INACTIVE state, the RRC release message comprising a suspending configuration that indicates to the UE that the UE is allowed to receive, in the RRC_INACTIVE state, data of an MBS Radio Bearer (MRB) associated with a multicast session; and
transmit the data of the MRB to the UE after transmitting the RRC release message to the UE.
18 . The BS of claim 17 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the BS to:
transmit deactivation signaling to the UE, causing the UE to stop receiving the data of the MRB,
wherein the deactivation signaling indicates that the multicast session associated with the MRB is to be deactivated.
19 . The BS of claim 18 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the BS to:
transmit, after transmitting the deactivation signaling, activation signaling to the UE, causing the UE to resume reception of the data of the MRB,
wherein the activation signaling indicates that the multicast session associated with the MRB is to be activated.
20 . The BS of claim 19 , wherein transmitting the activation signaling to the UE comprises:
transmitting a paging message to the UE, the paging message comprising a Temporary Mobile Group Identity (TMGI) associated with the multicast session.
21 . The BS of claim 17 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the BS to:
receive a capability report from the UE, the capability report indicating that the UE supports receiving the data of the MRB in the RRC_INACTIVE state.