感知不确定下卫星认知无线网络多频谱接入优化策略

肖楠; 王伟; 梁俊; 刘玉磊; 张振浩

doi:10.11999/JEIT170613

感知不确定下卫星认知无线网络多频谱接入优化策略

doi: 10.11999/JEIT170613

基金项目:

国家自然科学基金(61501496)，陕西省自然科学基金(2017JM6093)

计量
- 文章访问数: 1162
- HTML全文浏览量: 181
- PDF下载量: 168
- 被引次数: 0
出版历程
- 收稿日期: 2017-06-27
- 修回日期: 2017-12-07
- 刊出日期: 2018-04-19

Optimized Multi-Spectrum Access Strategy under Sensing Uncertainty for Cognitive Satellite Communication Network

Funds:

The National Natural Science Foundation of China (61501496), The Natural Science Foundation of Shaanxi Province (2017JM6093)

摘要

摘要: 针对卫星认知无线网络频谱感知不确定性较大导致传统频谱接入机制效率降低的问题，该文提出一种基于动态多频谱感知的信道接入优化策略。认知LEO卫星根据频谱检测概率与授权用户干扰门限之间的关系，实时调整不同频谱感知结果下的信道接入概率。在此基础上以系统吞吐量最大化为目标，设计了一种基于频谱检测概率和虚警概率联合优化的判决门限选取策略，并推导了最佳感知频谱数量。仿真结果表明，认知用户能够在不大于授权用户最大干扰门限的前提下，根据授权信道空闲状态动态选择最佳频谱感知策略，且在检测信号信噪比较低时以更加积极的方式接入授权频谱，降低了频谱感知不确定性对信道接入效率的影响，提高了认知系统吞吐量。
- 卫星认知通信 /
- 感知不确定 /
- 频谱接入 /
- 门限优化 /
- 吞吐量
Abstract: In allusion to the low efficiency of traditional spectrum access strategies caused by high spectrum sensing uncertainty of satellite cognitive communication network, a novel optimized channel access strategy based on dynamic multi-spectrum sensing is proposed. The cognitive LEO satellite could adjust the probability of channel access in time with different spectrum sensing results according to the relationship between spectrum detection probability and maximum interference threshold of primary user. In order to achieve the maximize throughput of cognitive system, a strategy for decision threshold selection based on joint optimization between spectrum detection probability and false alarm probability is designed, and the optimized number of sensing spectrums is derived. Simulation results indicate that cognitive LEO satellite is able to select optimized spectrum sensing strategy dynamically according to the idle states of primary channels with the interference limitation of primary user, and access primary channels more positively especially when the signal-to-noise ratio of detecting signals is low. The influence of spectrum sensing uncertainty on the efficiency of channel access is depressed and the throughput of cognitive system is improved by the proposed channel access strategy.
- Cognitive satellite communication /
- Sensing uncertainty /
- Spectrum access /
- Threshold optimization /
- Throughput

HTML全文

参考文献(16)

SHREE Krishna Sharma, SYMEON Chatzinotas, and BJORN Ottersten. Cognitive radio techniques for satellite communication systems[C]. IEEE 78th Conference on Vehicular Technology, Las Vegas, NV, USA, 2013: 1-5. doi: 10.1109/VTCFall.2013.6692139.

LIOLIS Konstantinos, SCHLUETER Gerald, KRAUSE Jens, et al. Cognitive radio scenarios for satellite communications: the CoRaSat approach[C]. IEEE International Conference on Future Network and Mobile Summit, Lisboa, Portugal, 2013: 1-10.

DANIELE Tarchi, ALESSANDRO Guidotti, VINCENZO Icolari, et al. Technical challenges for cognitive radio application in satellite communications[C]. IEEE International Conference on Cognitive Oriented Wireless Networks, Oulu, Finland, 2014: 136-142. doi: 10.4108/icst. crowncom.2014.255727.

HYOIL K and KANG G S. Optimal online sensing sequence in multichannel cognitive radio networks[J]. IEEE Transactions on Mobile Computer, 2012, 12(7): 1349-1362. doi: 10.1109/TMC.2012.108.

YUAN Guangxiang, RYAN C Grammenos, YANG Yang, et al. Performance analysis of selective opportunistic spectrum access with traffic prediction[J]. IEEE Transactions on Vehicular Technology, 2009, 59(4): 1949-1959. doi: 10.1109/ TVT.2009.2039155.

金顺福, 代羽. 带有接入阈值和超时隙的认知无线网络频谱分配策略[J]. 电子与信息学报, 2014, 36(8): 1817-1823. doi: 10.3724/SP.J.1146.2013.01417.

JIN Shunfu and DAI Yu. A spectrum allocation strategy with an access threshold and super-slot in cognitive radio networks[J]. Journal of Electronics Information Technology, 2014, 36(8): 1817-1823. doi: 10.3724/SP.J.1146. 2013.01417.

郭文慧, 王亚林, 韩迎鸽. 基于POMDP的信道感知接入算法[J]. 计算机工程与应用, 2014, 50(5): 203-207. doi: 10.3778/ j.issn.1002-8331.1306-0379.

GUO Wenhui, WANG Yalin, and HAN Yingge. Channel sensing and access algorithm based on POMDP[J]. Computer Engineering and Applications, 2014, 50(5): 203-207. doi: 10.3778/j.issn.1002-8331.1306-0379.

LIU Keqin, ZHAO Qing, and BHASKAR Krishnamachari. Dynamic multichannel access with imperfect channel state detection[J]. IEEE Transactions on Signal Processing, 2010, 58(5): 2795-2808. doi: 10.1109/TSP.2010.2041600.

YI Shi and YALIN E S. Spectrum learning and access for cognitive satellite communications under jamming[C]. IEEE Conference on Communications and Network Security (CNS), Philadelphia, PA, USA, 2016: 978-986. doi: 10.1109/CNS. 2016.7860538.

JIN Lai, ERYK Dutkiewicz, REN Ping Liu, et al. Dynamic spectrum access with two-channel sensing in cognitive radio networks[C]. International Conference on Cognitive Radio and Networks Symposium, Ottawa, ON, Canada, 2012: 1757-1762. doi: 10.1109/ICC.2012.6364284.

JIN Lai, ERYK D, LIU Renping, et al. Opportunistic spectrum access with two channel sensing in cognitive radio networks[J]. IEEE Transactions on Mobile Computing, 2015, 14(1): 126-138. doi 10.1109/TMC.2013.152.

肖楠, 梁俊, 刘玉磊. 基于动态多频谱感知的认知无线网络信道接入策略[J]. 上海交通大学学报, 2016, 50(5): 788-795. doi: 10.16183/j.cnki.jsjtu.2016.05.022.

XIAO Nan, LIANG Jun, and LIU Yulei. Channel access strategy based on dynamic multi-spectrum sensing in cognitive radio networks[J]. Journal of Shanghai Jiao Tong University, 2016, 50(5): 788-795. doi: 10.16183/j.cnki.jsjtu. 2016.05.022.

YAN Qi, YANG Jiawei, ZHANG Wen, et al. Optimal allocation of sensing duration among multiple channels in cognitive radio[J]. IEICE Electronics Express, 2011, 8(6): 346-352.

施引文献

资源附件(0)

访问统计