System and method for connection identification allocation in a broadband wireless access communication system

The present invention is a medium access control protocol data unit consisting of a header area and a payload area including user data including the control information: in a broadband wireless access communication system having a (MAC PDU Medium Access Control Protocol Data Unit) structure, the header region has a first length set in advance, the mobile subscriber first CID field indicates a connection identifier of the terminal and has a second length set in advance, the connection of the first CID field according to a predetermined control identifier is the concatenation and a second CID field and the second-type region that indicates whether a second CID field indicates a connection identifier of the mobile subscriber station; Subsequent detection of the CID assigned to any mobile subscriber station haeyaham, determines a CID to be allocated to the mobile subscriber station; If the length of the determined CID be the same as the first length sikimyeo including the determined CID in the first CID field, to include information indicating the type of area it does not use the second CID field and transmits the MAC PDU to the MSS. CID, MAC header, addressing, Extend CID sub-header, addressing