Patent ID: 8548472

Claim:
A Mobile Station (MS) operation method for cell selection at initial access in a wireless communication system in which one or more micro Base Stations (BSs) are comprised within a macro BS service coverage area, the method comprising: powering on; obtaining position information of the MS; performing an initial synchronization based on a preamble signal; after performing the initial synchronization, transmitting a ranging code to a first BS; after transmitting the ranging code, transmitting a ranging request message comprising the position information of the MS to the first BS; and receiving a ranging response message comprising information on at least one candidate BS from the first BS; determining a candidate BS with a highest preamble signal strength among the at least one candidate BS; and performing a ranging procedure to the candidate BS, wherein the first BS includes the macro BS, wherein the at least one candidate BS includes at least one micro BS, wherein the at least one candidate BS is selected so that a system capacity is increased, by the first BS, by considering the position information of the MS, and a position and loading of each of the one or more micro BSs and the macro BS, and wherein the position and the loading of each of the one or more micro BSs and the macro BS are shared through mutual information exchange.