Patent ID: 11950133
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method of a network entity for an inter-system change from a first mode to a second mode in a wireless communication system, the method comprising:
receiving, from a user equipment (UE), a request message including first information related to whether a header compression for control plane CIoT 5GS optimization is supported by the UE, wherein the first information is indicated by a value included in a capability information element (IE) of the request message; and
transmitting, to the UE, an accept message including second information related to whether the header compression is supported by the network entity,
wherein based on the first information indicating that the header compression is supported at the UE, the second information indicating that the header compression is supported at the network entity, the UE operating in a single-registration mode in the network entity supporting an N26 interface, a modification procedure for negotiating header compression configuration is initiated,
wherein in case of the inter-system change of the UE from the first mode, a S1 mode, to the second mode, a N1 mode, the request message is a message for requesting registration, and
wherein the header compression configuration is negotiated based on the modification procedure.