Patent ID: 9055560
Filing Date: 2015-06-09
Classification: H04W

Abstract:
1. A method for enhanced connection recovery, the method comprising: establishing a radio resource control (RRC) connection by a user equipment (UE) with a serving base station in a mobile communication network; detecting a radio link failure (RLF) of the RRC connection with the serving base station; transmitting an RRC reestablishment request message to a target base station after the RLF, wherein the RRC reestablishment request message comprises a non-access stratum (NAS) service request for obtaining UE context information, wherein the NAS service request is transmitted before performing a subsequent RRC connection setup procedure with the target base station; receiving an RRC reestablishment reject message from the target base station in response to the RRC reestablishment request message, wherein the RRC reestablishment reject message comprises an uplink resource grant; performing the RRC connection setup with the target base station using the uplink resource grant; and performing an RRC connection reconfiguration with the target base station after the RRC connection setup.