A MAC Protocol Based on OFDMA Technique

The media access control(MAC) protocol applied for orthogonal frequency division multiple access(OFDMA) system—centralized mini-slot packet reservation multiple access(CMPRMA) protocol was presented.The proposed protocol divides the radio resources into mini-time-frequency blocks,which are the basic transmission units.As the central controller,Base station manages the resource allocation dynamically for users' access and data transmission.It not only inherits the advantages of mini-packet reservation multiple access(MPRMA) protocol,which can support real-time traffic well,but also can supply the resource reservation scheme for data traffic,and can support efficient transmission for multi-users and multi-traffics.