Patent ID: 7653022
Filing Date: 2010-01-26
Classification: H04W,Y02D

Abstract:
1. A method for updating a sleep identifier (SLPID) by a base station (BS) in a broadband wireless access (BWA) communication system, the method comprising: transmitting a message including SLPID update information to a mobile station (MS) in sleep mode operation when there is no traffic directed to the MS, wherein the SLPID update information includes information on an old SLPID allocated to the MS and a new SLPID allocated to the MS for updating the old SLPID, and an SLPID is uniquely assigned by the BS whenever an MS is instructed to enter a sleep mode, wherein the SLPID update information includes M bits, the first M/2 bits among M bits indicate the old SLPID, the last M/2 bits among M bits indicate the new SLPID, and M is an integer greater than 2, and wherein the message is a traffic indication (MOB_TRF-IND) message, and the MOB_TRF-IND message includes a negative indication when there is no traffic directed to the MS.