Release cause for transition from connected state
Systems, methods, and apparatus for handling communications relating to suspending a user equipment in a radio access network (RAN) are disclosed. An example method includes the user equipment receiving a radio resource control (RRC) release message from a network node. The user equipment determines that the RRC release message includes a suspend configuration field. The user equipment applies delta signalling corresponding to a suspend configuration indicated by the suspend configuration field and transitions to an inactive state.
1. A method performed by a user equipment (UE), the method comprising:
receiving a radio resource control (RRC) release message from a network node;
determining that the RRC release message includes a suspend configuration field;
applying delta signalling corresponding to a suspend configuration indicated by the suspend configuration field; and
transitioning the user equipment to an inactive state.
2. The method of claim 1 , wherein the suspend configuration field indicates a configuration corresponding to the inactive state.
3. The method of claim 1 , wherein applying delta signalling comprises:
receiving changed suspend configuration information indicated by the suspend configuration field; and
accessing unchanged suspend configuration information from previously stored suspend configuration information on the user equipment.
4. The method of claim 1 , wherein the suspend configuration includes RAN Notification Area (RNA) information.
5. The method of claim 1 , wherein the delta signalling is applied to update RAN Notification Area (RNA) information in the suspend configuration.
6. The method of claim 1 , wherein the transitioning of the user equipment to the inactive state is performed during a connection of the user equipment to a 5G core network from a long term evolution (LTE) network.
7. The method of claim 1 , wherein the RRC release message is received while user equipment is operating in a connected state.
8. A non-transitory computer readable medium storing computer readable program code executable by processing circuitry of a user equipment to perform operations comprising:
receiving a radio resource control (RRC) release message from a network node;
determining that the RRC release message includes a suspend configuration field;
applying delta signalling corresponding to a suspend configuration indicated by the suspend configuration field; and
transitioning the user equipment to an inactive state.
9. The non-transitory computer readable medium of claim 8 , wherein the suspend configuration field indicates a configuration corresponding to the inactive state.
10. The non-transitory computer readable medium of claim 8 , wherein applying delta signalling comprises:
receiving changed suspend configuration information indicated by the suspend configuration field; and
accessing unchanged suspend configuration information from previously stored suspend configuration information on the user equipment.
11. The non-transitory computer readable medium of claim 8 , wherein the suspend configuration includes RAN Notification Area (RNA) information.
12. The non-transitory computer readable medium of claim 8 , wherein the delta signalling is applied to update RAN Notification Area (RNA) information in the suspend configuration.
13. The non-transitory computer readable medium of claim 8 , wherein the transitioning of the user equipment to the inactive state is performed during a connection of the user equipment to a 5G core network from a long term evolution (LTE) network.
14. The non-transitory computer readable medium of claim 8 , wherein the RRC release message is received while user equipment is operating in a connected state.
15. A user equipment comprising:
a non-transitory memory; and
processing circuitry coupled to the non-transitory memory and configured to read instructions from the non-transitory memory to perform operations comprising:
receiving a radio resource control (RRC) release message from a network node;
determining that the RRC release message includes a suspend configuration field;
applying delta signalling corresponding to a suspend configuration indicated by the suspend configuration field; and
transitioning the user equipment to an inactive state.
16. The user equipment of claim 15 , wherein the suspend configuration field indicates a configuration corresponding to the inactive state.
17. The user equipment of claim 15 , wherein applying delta signalling comprises:
receiving changed suspend configuration information indicated by the suspend configuration field; and
accessing unchanged suspend configuration information from previously stored suspend configuration information on the user equipment.
18. The user equipment of claim 15 , wherein the suspend configuration includes RAN Notification Area (RNA) information.
19. The user equipment of claim 15 , wherein the delta signalling is applied to update RAN Notification Area (RNA) information in the suspend configuration.
20. The user equipment of claim 15 , wherein the RRC release message is received while user equipment is operating in a connected state.