Patent ID: 7773988

Claim:
An initial network entry method by a Mobile Station (MS) in a wireless mobile communication system, the initial network entry method comprising: transmitting a ranging request message including a Medium Access Control (MAC) address including a product group IDentifier (ID) indicating a specific product group to which the MS corresponds in a predetermined format to a Base Station (BS); and receiving a ranging response message including information associated with basic capability negotiation and information associated with registration, corresponding to the product group ID, from the BS, wherein the information associated with basic capability negotiation and the information associated with registration are determined by the BS storing product group IDs of MSs previously performing a network entry, and information associated with basic capability negotiation and information associated with registration corresponding to each of the MSs, and wherein the MAC address includes 24 bits representing a manufacturer ID of the MS, 8 bits representing the product group ID, and 16 bits representing a serial number assigned to the MS by a manufacturer.