CR网络中基于BCR-MAC协议的频谱接入策略
发布时间：2018-11-06 13:55
【摘要】：现代无线网络应用对高数据率的要求引发了频谱资源利用方面的探究。为了提高频谱利用率，有策略提出让主用户和次用户共享资源。认知无线电被认为是提高频谱利用率的一种潜在的解决方案，由于其在无线网络中考虑了动态频谱接入。为了有效部署认知无线电网络，MAC层实行了协作通信。 CR网络频谱分配的一个主要问题是怎样接入频谱并能保留次级用户链路。本文的目的是基于BCR-MAC协议对这种技术提出不同的MAC替代方案。此方案易于识别检测错误，例如漏检和错检。 本文采用备份信道预约机制的MAC协议来用处理等待的次级用户链路从而避免了其与主用户的冲突。最近关于BCR协议的概念是根据包括占有率，信道现状，剩余空闲时间和释放时间等标准来选择信道。这种方案提供了有效的次级用户链路支持，同时也减少了对主次用户的干扰。 由MATLAB和NS得到的仿真结果验证了BCR-MAC协议的鲁棒性。
[Abstract]:The demand for high data rate in modern wireless network applications leads to the exploration of spectrum resource utilization. In order to improve spectrum efficiency, a strategy is proposed to share resources between primary and secondary users. Cognitive radio is considered as a potential solution to improve spectrum efficiency because it considers dynamic spectrum access in wireless networks. In order to deploy cognitive radio networks effectively, the MAC layer implements cooperative communication. One of the main problems of spectrum allocation in CR networks is how to access the spectrum and retain secondary user links. The purpose of this paper is to propose different MAC alternatives to this technique based on BCR-MAC protocol. This scheme is easy to identify and detect errors, such as miss and error detection. In this paper, the MAC protocol of backup channel reservation mechanism is used to deal with the waiting secondary user link so as to avoid the conflict between the secondary user and the primary user. Recently, the concept of BCR protocol is to select the channel according to the criteria including occupancy rate, channel status, remaining idle time and release time. This scheme provides effective secondary user link support and reduces interference to primary and secondary users. The simulation results obtained from MATLAB and NS verify the robustness of BCR-MAC protocol.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925
本文编号：2314474
[Abstract]:The demand for high data rate in modern wireless network applications leads to the exploration of spectrum resource utilization. In order to improve spectrum efficiency, a strategy is proposed to share resources between primary and secondary users. Cognitive radio is considered as a potential solution to improve spectrum efficiency because it considers dynamic spectrum access in wireless networks. In order to deploy cognitive radio networks effectively, the MAC layer implements cooperative communication. One of the main problems of spectrum allocation in CR networks is how to access the spectrum and retain secondary user links. The purpose of this paper is to propose different MAC alternatives to this technique based on BCR-MAC protocol. This scheme is easy to identify and detect errors, such as miss and error detection. In this paper, the MAC protocol of backup channel reservation mechanism is used to deal with the waiting secondary user link so as to avoid the conflict between the secondary user and the primary user. Recently, the concept of BCR protocol is to select the channel according to the criteria including occupancy rate, channel status, remaining idle time and release time. This scheme provides effective secondary user link support and reduces interference to primary and secondary users. The simulation results obtained from MATLAB and NS verify the robustness of BCR-MAC protocol.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925
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1 胡瑞佑;CR网络中基于BCR-MAC协议的频谱接入策略[D];华中科技大学;2014年
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