一种改进的基于MMAC协议的认知无线网络MAC协议

摘要/Abstract

摘要：

面对当前频谱资源稀缺和多种异构无线接入技术并存的通信网络格局，认知无线网络技术的提出被

认为是解决该问题的关键技术。媒体访问控制MAC协议决定了节点通过共享的无线信道发送和接收数据的

方式，MAC协议能否合理地利用有限的无线信道资源对认知无线网络的性能起着决定性的影响。围绕如何

设计高效的认知无线网络MAC协议，提出了CRMMAC协议，CRMMAC是一种基于专用控制信道的MAC协议，

该协议是将MMAC协议进行了适当的改进，使之适合于认知无线网络环境，从网络假设条件、信道使用模型

、协议帧结构、感知和接入信道的策略等方面详细阐述了该协议。仿真分析表明CRMMAC协议具有较好的

性能。

关键词: 认知无线网络, MAC协议, 频谱感知, 信道接入

Abstract:

The cognitive radio network is proposed in the face of scarce spectrum resources

and a variety of heterogeneous wireless access techniques. Media Access Control (MAC)

protocol decides how the nodes in the networks receive and send data by shared wireless

channels. Whether the MAC protocol can use the limited channel effectively or not plays a

very important role in the performance of the cognitive radio network. Focusing on designing

and implementing an excellent MAC protocol in cognitive radio networks, CRMMAC is

proposed, which is an improved MAC protocol based on MMAC. In CRMMAC, there is a dedicated

control channel. The network conditions, channel usage model, protocol frame structure and

channel access strategy are presented. The simulation result shows that the proposed

protocol has good performance.

Key words: cognitive radio networks;media access control protocol;spectrum sense;channel access

王挥，高刃. 一种改进的基于MMAC协议的认知无线网络MAC协议[J]. J4, 2013, 35(12): 66-75.

WANG Hui,GAO Ren. An improved MMAC based MAC protocol for cognitive radio network [J]. J4, 2013, 35(12): 66-75.

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