Abstract: A method, user equipment and non-transitory computer readable memory for establishing an emergency service using a wireless network includes unilaterally deactivating, at the user equipment when the user equipment needs to establish an emergency service, at least one active context with the wireless network without deactivating at least one other active context. Thereafter directing to the wireless network, a request to establish the emergency service that identifies the emergency service and one or more contexts that remain active after the unilateral deactivation of the at least one active context by the user equipment, synchronizing, in response to and based on the request, current context status information of the user equipment with the wireless network, and then establishing the emergency service using the wireless network with which the active context was deactivated.

Abstract: A method, user equipment and non-transitory computer readable memory for establishing an emergency service using a wireless network includes unilaterally deactivating, at the user equipment when the user equipment needs to establish an emergency service, at least one active context with the wireless network without deactivating at least one other active context. Thereafter directing to the wireless network, a request to establish the emergency service that identifies the emergency service and one or more contexts that remain active after the unilateral deactivation of the at least one active context by the user equipment, synchronizing, in response to and based on the request, current context status information of the user equipment with the wireless network, and then establishing the emergency service using the wireless network with which the active context was deactivated.

Abstract: A method, user equipment and non-transitory computer readable memory for establishing an emergency service using a wireless network includes unilaterally deactivating, at the user equipment when the user equipment needs to establish an emergency service, at least one active context with the wireless network without deactivating at least one other active context. Thereafter directing to the wireless network, a request to establish the emergency service that identifies the emergency service and one or more contexts that remain active after the unilateral deactivation of the at least one active context by the user equipment, synchronizing, in response to and based on the request, current context status information of the user equipment with the wireless network, and then establishing the emergency service using the wireless network with which the active context was deactivated.

Abstract: A user equipment UE with an active connection (radio or logical) with a wireless network needs to establish an emergency service. The UE unilaterally deactivates an active session or context with the wireless network, and thereafter sends to the wireless network signaling to establish the emergency service, in which the signaling specifically identifies the service as an emergency service. In one embodiment (FIG. 1) the UE locally detaches from an active packet domain communication and sends an emergency attach so as to clear resources. In another embodiment (FIG. 2) the UE deactivates one or more contexts and sends an extended service request which identifies one or more context which remains active after the deactivating. In another embodiment (FIG. 3), after the signaling to establish the emergency service (SERVICE REQUEST) the UE sends a deactivation message explicitly indicating which context(s) is/are deactivated (PDN CONTEXT DEACTIVATION or PDN DISCONNECT REQUEST).

Abstract: A user equipment UE with an active connection (radio or logical) with a wireless network needs to establish an emergency service. The UE unilaterally deactivates an active session or context with the wireless network, and thereafter sends to the wireless network signaling to establish the emergency service, in which the signaling specifically identifies the service as an emergency service. In one embodiment (FIG. 1) the UE locally detaches from an active packet domain communication and sends an emergency attach so as to clear resources. In another embodiment (FIG. 2) the UE deactivates one or more contexts and sends an extended service request which identifies one or more context which remains active after the deactivating. In another embodiment (FIG. 3), after the signaling to establish the emergency service (SERVICE REQUEST) the UE sends a deactivation message explicitly indicating which context(s) is/are deactivated (PDN CONTEXT DEACTIVATION or PDN DISCONNECT REQUEST).