Patent ID: 7844268

Claim:
A method of notifying of service information changes according to the state of a first user equipment (UE: UE-A) in a wireless communication system, comprising the steps of: establishing a connection with a second UE (UE-B) and receiving a service by the connection; updating, upon generation of an event triggering a change in the state of UE-A during the service, an available service list for UE-A (UE-ASL-A) being supported in the UE-A after the state change; sending service information indicating the updated UE-ASL-A to UE-B; receiving an available service list for UE-B (UE-ASL-B) responding to the service information indicating the updated UE-ASL-A; comparing the updated UE-ASL-A with UE-ASL-B and updating a list of common available services (ASL) according to the comparison; and notifying the UE-A of the updated ASL, while maintaining the connection.