Patent ID: 9131354
Filing Date: 2015-09-08
Classification: H04W

Abstract:
1. A method for, by a terminal in an idle state in a wireless access system supporting machine-to-machine (M2M) communication, updating an M2M group identifier (MGID) for identifying a multicast service flow shared by a group of M2M terminals in an M2M group zone, the method comprising: receiving, from a first base station, the MGID and an M2M group zone identifier of the first base station; receiving, from a second base station, an M2M group zone identifier of the second base station; requesting MGID update to the second base station when the M2M group zone identifier of the second base station is different from the M2M group zone identifier of the first base station; and the second base station updating the MGID on the basis of a new MGID transmitted from the second base station as a response to the request.