基于网络编码的动态频谱接入性能研究

Research on Performance of Dynamic Spectrum Access Based on Network Coding

探讨了网络编码应用到认知无线电网络中的可能性,通过马尔可夫模型分析了采用网络编码技术后无线网络中的用户服务性能,并通过理论分析和数值仿真表验证了网络编码技术可有效降低次用户和主用户的冲突概率,增加次用户的实际吞吐率;同时应用在频谱分配机制中也可改进主用户的频谱预测能力,对主、次用户频谱的利用均有所帮助。

The feasibility of the application of network coding to cognitive radio network was discussed in this paper. The user service performance of network coding in wireless network was analyzed by means of Markov model. Theoretical analysis and numerical simulation show that network coding can effectively reduce the conflict probability of secondary and primary users, increase user throughput. In addition, its application to spectrum allocation is able to improve the spectrum prediction capability of the primary users and beneficial for the spectrum utilization of primary and secondary users.