Method and system for supporting fast recovery of user equipment

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive a first radio resource control (RRC) message from a user equipment (UE),
• transmit a UE context request message associated with the UE to a last serving base station,
• receive a UE context response message associated with the UE from the last serving base station,
• transmit a path switch request message to a mobility management node associated with the UE based on the UE context response message,
• receive a path switch response message from the mobility management node associated with the UE, and
• transmit information associated with releasing a context of the UE to the last serving base station based on the path switch response message,
• wherein the UE context request message includes a base station UE application protocol (AP) identifier allocated by the base station, and
• wherein the UE context response message includes the base station UE AP identifier allocated by the base station and a base station UE AP identifier allocated by the last serving base station.

A method performed by a last serving base station in a wireless communication system, the method comprising:

• receiving a user equipment (UE) context request message associated with a UE from a base station;
• performing a security check based on the UE context request message associated with the UE;
• transmitting a UE context response message associated with the UE to the base station based on a success of the security check;
• and
• receiving information associated with releasing a context of the UE from the base station,
• wherein the UE context request message includes a base station UE application protocol (AP) identifier allocated by the base station, and
• wherein the UE context response message includes the base station UE AP identifier allocated by the base station and a base station UE AP identifier allocated by the last serving base station.

A last serving base station in a wireless communication system, the last serving base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive a user equipment (UE) context request message associated with a UE from a base station,
• perform a security check based on the UE context request message associated with the UE,
• transmit a UE context response message associated with the UE to the base station based on a success of the security check, and
• receive information associated with releasing a context of the UE from the base station,
• wherein the UE context request message includes a base station UE application protocol (AP) identifier allocated by the base station, and
• wherein the UE context response message includes the base station UE AP identifier allocated by the base station and a base station UE AP identifier allocated by the last serving base station.

A method performed by a user equipment (UE) in a wireless communication system, the method comprising:

• transmitting a first radio resource control (RRC) message to a base station;
• and
• receiving a last serving RRC message associated with an RRC connection from the base station,
• wherein a UE context request message associated with the UE is transmitted from the base station to a last serving base station based on reception of the first RRC message,
• wherein the last serving RRC message associated with the RRC connection is transmitted from the base station, based on reception of a UE context response message associated with the UE at the base station,
• wherein the UE context request message includes a base station UE application protocol (AP) identifier allocated by the base station, and
• wherein the UE context response message includes the base station UE AP identifier allocated by the base station and a base station UE AP identifier allocated by the last serving base station.

A user equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver;
• and
• a controller configured to:
• transmit a first radio resource control (RRC) message to a base station, and
• receive a last serving RRC message associated with an RRC connection from the base station,
• wherein a UE context request message associated with the UE is transmitted from the base station to a last serving base station based on reception of the first RRC message,
• wherein the last serving RRC message associated with the RRC connection is transmitted from the base station, based on reception of a UE context response message associated with the UE at the base station,
• wherein the UE context request message includes a base station UE application protocol (AP) identifier allocated by the base station, and
• wherein the UE context response message includes the base station UE AP identifier allocated by the base station and a base station UE AP identifier allocated by the last serving base station.