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提出了一种多信道自适应媒体接入控制(MAC)协议,该协议引入了竞争控制信道和预留控制信道.认知用户在接入过程中,首先在竞争控制信道上预约、预留控制信道子帧,然后再通过预留控制信道基于请求带宽预约数据信道,同时认知用户通过维护信道状态表来分配和回收信道资源.仿真结果表明,该协议可有效地调度多用户多信道接入,具有良好的可扩展性和端到端吞吐性能,可大大降低冲突和拥塞概率及端到端时延.
A multi-channel adaptive media access control (MAC) protocol is proposed, which introduces a contention control channel and a reserved control channel.Cognitive users in the access process, the first reservation in the contention control channel, reserved control Channel sub-frame, and then reserve the data channel based on the request bandwidth by reserving the control channel, at the same time, the cognitive user allocates and reclaims the channel resource by maintaining the channel state table.The simulation results show that this protocol can effectively schedule multi-user multi-channel access , With good scalability and end-to-end throughput performance, can greatly reduce the conflict and congestion probability and end-to-end delay.