A wireless communication system, an apparatus, and a method for transmitting information to describe network topology of the wireless communication system in a mobile multi-hop relay standard are disclosed. The system can either be a two-hop relay station system or a multi-hop relay station system. The apparatus can use a CDMA ranging code set to transmit information and manage other apparatuses of the wireless communication system under a mobile multi-hop relay standard. The CDMA ranging code set comprises a mobile station (MS) code set and a relay station (RS) code set. The MS code set is used to transmit information from the MS to the base station (BS). Likewise, the RS code set is used to transmit information from the RS and the BS.