Patent ID: 11882433
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. An apparatus comprising:
a processor coupled to a memory storing instructions and configured to execute the instructions to cause the apparatus to:
receive, from a source access network device, a radio resource control (RRC) release message comprising suspend configuration information, wherein the suspend configuration information indicates the apparatus to enter an inactive state;
perform verification of integrity protection of the RRC release message using an RRC integrity protection key;
retain, when the verification succeeds, an inactive-radio network temporary identifier (I-RNTI) and first indication information, wherein the first indication information indicates a user plane security protection method used before the apparatus enters the inactive state from a connected state, and wherein the user plane security protection method indicates whether at least one of user plane encryption protection or user plane integrity protection is enabled;
send an RRC resume request to a target access network device; and
activate, by using the user plane security protection method, user plane security between the apparatus and the target access network device when receiving an RRC resume message from the target access network device.