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该文提出了机会频谱接入网络中一种新的多信道MAC协议--OSAM-MAC。它工作在多信道环境中,可以进行频谱感知,利用空闲频谱。采用OSAM-MAC协议,认知用户首先感知所有信道的使用情况,当用户有通信需求时交换信道状态列表,然后选择信道,减少了控制信息开销。同时,避免了隐藏终端问题。仿真结果证明,采用该协议可以提高系统累积吞吐量。
This paper proposes a new multi-channel MAC protocol called OSAM-MAC in opportunistic spectrum access network. It operates in a multichannel environment that allows spectrum sensing and utilization of idle spectrum. Using OSAM-MAC protocol, cognitive users first perceive the use of all channels, when users have communication needs to exchange channel status list, and then select the channel, reducing the control information overhead. At the same time, to avoid hidden terminal problems. Simulation results show that using this protocol can improve the system cumulative throughput.