Patent ID: 8259678
Filing Date: 2012-09-04
Classification: H04W

Abstract:
1. A method for performing an uncontrolled handover in a mobile station (MS), comprising: determining, by the MS, whether a resource retain timer of a serving base station has expired, wherein the resource retain timer indicates time during which the serving base station retains context of the MS; if the resource retain timer has not expired, transmitting, by the MS to a target base station (TBS), a ranging request message during a network reentry procedure to the target base station, the ranging request message including a base station identifier of the serving base station and a station identifier used in the serving base station for identifying the MS; and receiving, by the MS from the TBS, a ranging response message in response to the ranging request message, the ranging response message including a temporary station identifier used for identifying the MS when a new station identifier is not assigned or the new station identifier to be used for identifying the MS by the TBS, wherein the ranging request message and the ranging response message are used for the uncontrolled handover.