Maintaining a multicast/broadcast radio bearer in an idle state or an inactive state

1. A method of wireless communication performed by a user equipment (UE), comprising:

receiving a configuration for a multicast/broadcast radio bearer (MRB);

entering an idle state or an inactive state after the MRB has been configured; and

maintaining the MRB while the UE is in the idle state or the inactive state subject to one or more limitations, of the configuration, associated with maintaining the MRB in the idle state or the inactive state, wherein the one or more limitations cause the UE to refrain from using one or more timers while the UE is in the idle state or the inactive state, and wherein the one or more timers include one or more of:

a first timer associated with preventing transmission of multiple status reports within a time period defined by the first timer, or

a second timer associated with discarding an incomplete packet responsive to all segments of the incomplete packet not being received within a time period defined by the second timer.

2. The method of claim 1 , wherein maintaining the MRB includes storing a context associated with the MRB in memory of the UE rather than deleting the context from memory upon entering the idle state or the inactive state.

3. The method of claim 1 , wherein the one or more limitations apply to the MRB while the UE is in the idle state or the inactive state and do not apply to the MRB while the UE is in a connected state.

4. The method of claim 1 , further comprising:

exiting the idle state or the inactive state to enter a connected state; and

communicating using the MRB while in the connected state using the configuration.

5. The method of claim 1 , further comprising receiving one or more retransmissions via the MRB while in the idle state or the inactive state.

6. The method of claim 1 , wherein the one or more limitations prohibit the UE from transmitting a radio link control (RLC) status report while the UE is in the idle state or the inactive state.

7. The method of claim 1 , wherein the one or more limitations further cause the UE to ignore a polling request, for triggering transmission of a radio link control (RLC) status report, while the UE is in the idle state or the inactive state.

8. The method of claim 1 , further comprising:

receiving a polling request, for triggering transmission of a radio link control (RLC) status report, while the UE is in the idle state or the inactive state; and

refraining from transmitting the RLC status report in response to the polling request based at least in part on the UE being in the idle state or the inactive state and based at least in part on the one or more limitations.

9. The method of claim 1 , wherein the one or more timers include the first timer.

10. The method of claim 1 , wherein the one or more timers include the second timer.

11. A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors configured to:

receive a configuration for a multicast/broadcast radio bearer (MRB);

enter an idle state or an inactive state after the MRB has been configured; and

maintain the MRB while the UE is in the idle state or the inactive state subject to one or more limitations, of the configuration, associated with maintaining the MRB in the idle state or the inactive state, wherein the one or more limitations cause the UE to refrain from using one or more timers while the UE is in the idle state or the inactive state, and wherein the one or more timers include one or more of:

a first timer associated with preventing transmission of multiple status reports within a time period defined by the first timer, or

a second timer associated with discarding an incomplete packet responsive to all segments of the incomplete packet not being received within a time period defined by the second timer.

12. The UE of claim 11 , wherein the one or more processors, when maintaining the MRB, are configured to store a context associated with the MRB in the memory rather than deleting the context from the memory upon entering the idle state or the inactive state.

13. The UE of claim 11 , wherein the one or more limitations apply to the MRB while the UE is in the idle state or the inactive state and do not apply to the MRB while the UE is in a connected state.

14. The UE of claim 11 , wherein the one or more processors are further configured to:

exit the idle state or the inactive state to enter a connected state; and

communicate using the MRB while in the connected state using the configuration.

15. The UE of claim 11 , wherein the one or more processors are further configured to receive one or more retransmissions via the MRB while in the idle state or the inactive state.

16. The UE of claim 11 , wherein the one or more limitations prohibit the UE from transmitting a radio link control (RLC) status report while the UE is in the idle state or the inactive state.

17. The UE of claim 11 , wherein the one or more limitations further cause the UE to ignore a polling request, for triggering transmission of a radio link control (RLC) status report, while the UE is in the idle state or the inactive state.

18. The UE of claim 11 , wherein the one or more processors are further configured to:

receive a polling request, for triggering transmission of a radio link control (RLC) status report, while the UE is in the idle state or the inactive state; and

refrain from transmitting the RLC status report in response to the polling request based at least in part on the UE being in the idle state or the inactive state and based at least in part on the one or more limitations.

19. The UE of claim 11 , wherein the one or more timers include the first timer.

20. The UE of claim 11 , wherein the one or more timers include the second timer.

21. A method of wireless communication performed by a user equipment (UE), comprising:

receiving a configuration for a multicast/broadcast radio bearer (MRB);

storing a context associated with the MRB in a memory of the UE based at least in part on the configuration;

entering an idle state or an inactive state, after the MRB has been configured and the context has been stored, without removing the context from the memory; and

maintaining the MRB while the UE is in the idle state or the inactive state subject to one or more limitations, of the configuration, associated with maintaining the MRB in the idle state or the inactive state based at least in part on entering the idle state or the inactive state without removing the context from the memory, wherein the one or more limitations cause the UE to refrain from using one or more timers while the UE is in the idle state or the inactive state, and wherein the one or more timers include one or more of:

a first timer associated with preventing transmission of multiple status reports within a time period defined by the first timer, or

a second timer associated with discarding an incomplete packet responsive to all segments of the incomplete packet not being received within a time period defined by the second timer.

22. The method of claim 21 , wherein the one or more limitations apply to the MRB while the UE is in the idle state or the inactive state and do not apply to the MRB while the UE is in a connected state.

23. The method of claim 21 , wherein the one or more limitations prohibit the UE from transmitting a radio link control (RLC) status report while the UE is in the idle state or the inactive state.

24. The method of claim 21 , wherein the one or more limitations further cause the UE to ignore a polling request, for triggering transmission of a radio link control (RLC) status report, while the UE is in the idle state or the inactive state.

25. A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors configured to:

receive a configuration for a multicast/broadcast radio bearer (MRB);

store a context associated with the MRB in the memory based at least in part on the configuration;

enter an idle state or an inactive state, after the MRB has been configured and the context has been stored, without removing the context from the memory; and

maintain the MRB while the UE is in the idle state or the inactive state subject to one or more limitations, of the configuration, associated with maintaining the MRB in the idle state or the inactive state based at least in part on entering the idle state or the inactive state without removing the context from the memory, wherein the one or more limitations cause the UE to refrain from using one or more timers while the UE is in the idle state or the inactive state, and wherein the one or more timers include one or more of:

a first timer associated with preventing transmission of multiple status reports within a time period defined by the first timer, or

a second timer associated with discarding an incomplete packet responsive to all segments of the incomplete packet not being received within a time period defined by the second timer.

26. The UE of claim 25 , wherein the one or more limitations apply to the MRB while the UE is in the idle state or the inactive state and do not apply to the MRB while the UE is in a connected state.

27. The UE of claim 25 , wherein the one or more limitations prohibit the UE from transmitting an RLC status report while the UE is in the idle state or the inactive state.

28. The UE of claim 25 , wherein the one or more limitations further cause the UE to ignore a polling request for triggering transmission of a radio link control (RLC) status report while the UE is in the idle state or the inactive state.

29. The UE of claim 25 , wherein the one or more timers include the first timer.

30. The UE of claim 25 , wherein the one or more timers include the second timer.