Patent ID: 7480508
Filing Date: 2009-01-20
Classification: H04W

Abstract:
1. In a network supporting a broadcast-multicast service and serving a plurality of sectors, a method by which a mobile user determines a change in tracking area, comprising: receiving, by the mobile user, mapping data classifying groups of sectors into a plurality of tracking areas, each sector having one or more groups of mobile users, the mapping data associates a given sector identifier for each sector to one of the plurality of tracking areas to create associations between each sector and tracking area that are known to each mobile user of the one or more groups; receiving, by the mobile user, at least two pilot signals from at least two of the sectors; if a tracking area update enabled indicator for a current sector that has not been dropped is enabled and a timer interval has expired, comparing, by the mobile user, each of the at least two pilot signals to a threshold based on an adding criteria; and determining, by the mobile user, a change in tracking area from a previous transmission of a tracking area registration based on the comparing and the mapping data.