基于信道状态感知的多信道认知多址接入协议

doi:10.3969/j.issn.1000-436x.2014.04.008

通信学报 ›› 2014, Vol. 35 ›› Issue (4): 65-73.doi: 10.3969/j.issn.1000-436x.2014.04.008

基于信道状态感知的多信道认知多址接入协议

王亮,盛敏,张琰,马骁

西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071

出版日期:2014-04-25 发布日期:2017-07-03
基金资助:
国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;国家重点基础研究发展计划（“973计划）基金资助项目;教育部创新团队111基金资助项目;国家重大专项基金资助项目;国家重点实验室专项基金资项目;陕西省科学技术研究发展计划基金资助项目;国家高技术研究发展计划（“863”计划）基金资助项目

CAM-MAC: channel aware multi-channel MAC protocol in cognitive radio network

Liang WANG,Min SHENG,Yan ZHANG,Xiao MA

State Key Lab of ISN ＆ Information Science Institute, Xidian Univ., Xi'an 710071, China

Online:2014-04-25 Published:2017-07-03
Supported by:
The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Key Basic Research Program of China(973 Program);The 111 Project;The National Science and Technology Major Project;The Special Research Fund of State Key Laboratory;The Natural Science Basic Research Plan of Shaanxi Province;The National High Technology R＆D Program of China(863 Pro-gram)

摘要/Abstract

摘要：

针对多信道认知无线网络中预约信道与多个数据传输信道的状态不一致会降低认知多址协议性能的问题，提出了基于数据信道状态感知的多信道认知多址协议——CAM-MAC协议。该协议在预约信道上优化握手机制来减少平均成功预约时长；而在Nakagami衰落数传信道上采用跨层方法设计了基于瞬时SNR的自适应传输机制来提高数据传输速率。通过上述机制，CAM-MAC协议可以有效提升系统性能。分析与仿真均表明：该协议在饱和吞吐量上有较大提升，在特定场景下可提高约50%。

关键词: 多信道MAC协议, 自适应传输, 认知无线网络, 动态频谱接入

Abstract:

For multi-channel cognitive radio network (CRN), the inconsistent transmission conditions of common control channel (CCC) and data channels deteriorate the performance of cognitive MAC protocols. Focusing on this problem, a novel channel aware multi-channel cognitive MAC protocol (CAM-MAC) was proposed, which consists of two-level four-way handshaking mechanism. The first level two-way handshaking was optimized to reduce the mean successful reservation time on CCC. The other level two-way handshaking was implemented by a cross-layer approach to adopt the adaptive transmission based on instantaneous SNR on each Nakagami fading data channel to improve the data rate. These mechanisms improve the performance of CAM-MAC. Simulation results validate the throughput of CAM-MAC outper-forms that of the existing one, about 50% improvement in the throughput under certain conditions.

Key words: multichannel MAC protocol;, adaptive transmission, cognitive radio networks, dynamic spectrum access

王亮,盛敏,张琰,马骁. 基于信道状态感知的多信道认知多址接入协议[J]. 通信学报, 2014, 35(4): 65-73.

Liang WANG,Min SHENG,Yan ZHANG,Xiao MA. CAM-MAC: channel aware multi-channel MAC protocol in cognitive radio network[J]. Journal on Communications, 2014, 35(4): 65-73.

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参考文献 13

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参数名称	取值	解释
RTS	30 byte	RTS帧长
CTS	30 byte	CTS帧长
CT	20 byte	CT帧长
TP	20 byte	TP帧长
ACK	20 byte	ACK帧长
SIFS	16 μs	短帧间隔
DIFS	34 μs	DCF帧间隔
σ	9 μs	时隙长度
RC	1 Mbit/s	控制信道速率
CW_max	1 024	最大退避窗值

M-QAM	使用概率	信噪比范围/dB
信道中断	0.118 3	0≤γ＜21
BPSK	0.210 1	21≤γ＜26
4-QAM	0.303 7	26≤γ＜30.2
8-QAM	0.231 9	30.2≤γ＜33
16-QAM	0.136 0	γ≥33

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基于信道状态感知的多信道认知多址接入协议

CAM-MAC: channel aware multi-channel MAC protocol in cognitive radio network

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