Patent ID: 8743832
Filing Date: 2014-06-03
Classification: H04W

Abstract:
1. A method for performing an uncontrolled handover in a mobile station (MS), the method comprising: receiving, from a serving base station (SBS), a handover command message comprising one or more base station identifiers (BSIDs) of target base stations (TBSs) recommended by the SBS; transmitting, to the SBS, a handover indication message comprising an event code indicating all TBSs recommended by the SBS are unreachable and a BSID of a preferred TBS, when all TBSs recommended by the SBS are unreachable and the MS has the preferred TBS; performing a contention based CDMA ranging procedure with the preferred TBS; transmitting, to the preferred TBS, a ranging request message comprising a base station identifier of the SBS and a station identifier (STID) which the MS uses in the SBS; and receiving, from the preferred TBS, a ranging response message comprising a STID for the MS to use in the preferred TBS.