in a wireless communication system , a plurality of communication devices performs transmission and reception , each communication device including a signal processing unit / transmitting unit , a mac layer processing unit and an ip layer processing unit . the ip layer processing unit includes an ad hoc network processing unit , an address information management unit , a relay information storage unit and an arp information storage unit . the arp information storage unit stores an adaptive address code information table and the relay information storage unit stores a relay information table .