Patent ID: 8798621
Filing Date: 2014-08-05
Classification: H04W

Abstract:
1. A method for performing an idle-mode operation at a Mobile Station (MS) to which one or more paging groups are allocated, the method comprising: transmitting a deregistration request message requesting initiation of idle mode to a first Base Station (BS), wherein the deregistration request message includes mobility information indicating a mobility level of the MS, the mobility level representing a moving speed of the MS; receiving a deregistration command message including paging group information from the first BS, wherein the paging group information includes a primary paging group Identifier (ID) and a primary paging offset of a primary paging group allocated to the MS, and a secondary paging group ID, and a secondary paging offset of a secondary paging group allocated to the MS; and activating a paging group location update timer after moving from the primary paging group to the secondary paging group, wherein the primary paging group and the secondary paging group are set based on the mobility information, and wherein the mobility information indicates the mobility level of the MS as one of fast, medium, or slow.