DH-MAC: A Dynamic Channel Hopping MAC Protocol for Cognitive Radio Networks
DH-MAC: A Dynamic Channel Hopping MAC Protocol for Cognitive Radio Networks
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DOI：
10.1109/icc.2010.5502694
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
Chao-Fong Shih;Tsung Ying Wu;W. Liao
中科院分区：
文献类型：
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作者：
Chao-Fong Shih;Tsung Ying Wu;W. Liao
在本文中，我们提出了一种称为动态跳跃MAC（DH-MAC）的信道跳跃MAC协议，以提高认知无线电网络中频谱的利用率。在DH-MAC中，每个次要用户（SU）使用适应主要用户（PU）活动的信道跳变序列来切换其操作信道。我们提出的 DH-MAC 机制具有以下优点。 1) 不需要专用的公共控制通道进行操作。 2) 支持干扰范围内多个 SU 对同时传输的多重交会。 3) 两个SU的会合通道不会长时间被PU阻塞。 4)与现有方案相比，它允许SU在可用信道上操作的概率更高。 5) 一个认知无线电收发器就足够了。仿真结果表明，DH-MAC在更高的聚合吞吐量和对PU扰动的鲁棒性方面优于现有方案。
In this paper, we propose a channel-hopping MAC protocol called dynamic hopping MAC (DH-MAC) to improve the utilization of spectrum in cognitive radio networks. In DH-MAC, each secondary user (SU) switches its operation channel with a channel-hopping sequence which is adaptive to the activity of primary users (PUs). Our proposed DH-MAC mechanism enjoys the following merits. 1) It needs no dedicated common control channel for operation. 2) It supports multiple rendezvous for multiple simultaneous transmission pairs of SUs within the interfering range. 3) The rendezvous channel of two SUs will not be blocked by PUs for a long time. 4) It allows SUs a higher probability to operate on available channels as compared with existing schemes. 5) One cognitive radio transceiver is sufficient. The simulation results show that DH-MAC outperforms existing schemes in terms of higher aggregate throughput and more robustness to the disturbance of PUs.