Patent ID: 7894831

Claim:
A method of controlling idle mode between a mobile subscriber station and a network at least comprising a serving base station and a target base station, the method comprising: requesting to enter an idle mode by the mobile subscriber station by transmitting an idle mode request to the serving base station; entering the idle mode by receiving an idle mode grant command from the serving base station, the idle mode grant command including an identifier (ID) of a paging controller which is a network entity retaining service and operational information for the mobile subscriber station and/or administering paging activity for the mobile subscriber station while in the idle mode; transmitting a ranging request message to the target base station, wherein the ranging request message includes the paging controller ID; receiving a ranging response message in response to the ranging request message from the target base station; and performing a network re-entry procedure with the target base station based on the ranging response message, wherein the target base station informs the serving base station via the paging controller using the paging controller ID that the idle mode of the mobile subscriber station is terminated.