A Medium Access Control (MAC) apparatus and method for use in a channel overlay network of a wireless access system. The wireless access system, which is based on a multi-carrier, includes a plurality of physical modules for receiving signals from a plurality of terminals, a plurality of MAC (Medium...http://www.google.com.hk/patents/US7593375?utm_source=gb-gplus-share專利 US7593375 - Medium access control apparatus for use in a channel overlay network
