Patent ID: 8374625

Claim:
A method comprising: storing, by a mobile station while in an active state, a neighborhood paging list; transitioning from active state to idle state; receiving a paging group ID from a local base station; determining that the paging group ID received from the local base station does not match any of the paging group IDs on the mobile station's neighborhood paging list; and updating the neighborhood paging list based on information received from the local base station, the updated neighborhood paging list including a paging group ID (PGID) identifying a local paging area corresponding to the local base station and a list of neighbor paging group IDs identifying one or more paging areas that are neighbors to the local paging area; wherein the storing is performed by the mobile station in response to the mobile station performing a network re-entry procedure with a base station where the mobile station was previously active; and wherein the storing comprises: receiving, from the base station where the mobile station was last active, a paging group ID that identifies the last active paging area where the mobile station was last in an active state; receiving a list of neighbor paging group IDs from the base station that identify one of more paging areas that are neighbors to the last paging area; and storing the neighborhood paging list that includes the paging group ID that identifies the last paging area where the mobile station was in an active state and the list of neighbor paging group IDs that identify neighbor paging areas to the last paging area.