Patent ID: 7505775
Filing Date: 2009-03-17
Classification: H04W,Y02D

Abstract:
1. A method of verifying availability of a mobile subscriber station that is in an idle-mode, the method comprising: requesting to a base station by the mobile subscriber station to enter an idle-mode, wherein the base station is associated with a paging group comprising a plurality of base stations, and wherein each base station in the same paging group maintains an idle-mode list; receiving from the base station an idle-mode response command to enter the idle-mode, the idle-mode response command comprising at least one of a paging identifier, a paging cycle and a paging cycle offset; and receiving from the base station a paging command comprising an action code associated with performing ranging, wherein if a ranging request is not received by the base station during a predetermined period, the base station continues to transmit the paging command until a paging retrial count reaches a predetermined threshold and each idle-mode list of each base station in the same paging group is updated to remove the mobile subscriber station in response to a backbone message from the base station, the backbone message being associated with unavailability of the mobile subscriber station in the same paging group.