认知网新型动态频谱管理关键技术研究

Cognitive radio networking has been considered as a promising approach to alleviating the spectrum scarcity problem as well as to increase the spectrum utilization. The research on cognitive radio networks has been extremely hot in recent years, and the key enabling technologies of dynamic spectrum management is absolutely an important part. In this project, we mainly focus on the following four tasks: 1. We will design novel extended spectrum sensing schemes to exploit the available spectrum opportunities which could provide not only the presence information of the PU activities, but also their locations, transmit powers, and occupied spectrum bands. 2. We will analyze the mobility regularity of the spectrum available for secondary users, and predict the spectrum status in cognitive radio networks. 3. Taking into account the transmission delay, queuing delay, spectrum sensing delay, and spectrum negotiation delay, we will derive a novel delay model for cognitive radio networks, and design a delay-aware spectrum management scheme to enhance the performance of cognitive radio networks. 4. Based on all the above-mentioned research, we will investigate novel methodologies and theories to enhance throughput, delay, and fairness via cross-layer dynamic spectrum management.

认知无线电技术被认为是提高频谱利用率，解决频谱稀缺问题的有效技术。认知网中动态频谱管理策略的研究是当前通信领域中前沿且重要的课题之一。主要研究内容包括：1.研究新型的扩展频谱感知技术，发掘可用频谱资源的时域、频域、空域信息；2.分析频谱可用性变化规律，研究频谱状态预测技术；3.基于认知网的时延特性，建立认知网时延模型，研究面向时延的频谱管理技术；4.综合考虑网络的时延、吞吐量、公平性，研究认知网动态频谱跨层优化技术。鉴于目前针对认知网动态频谱管理技术的研究仍存在许多关键技术难点与实际问题，因此本课题的研究具有重要的理论和实际意义。

认知无线电技术被认为是提高频谱利用率，解决频谱稀缺问题的有效技术。认知网中动态频谱管理策略的研究是当前通信领域中前沿且重要的课题之一。主要研究内容包括：1.研究新型的扩展频谱感知技术，发掘可用频谱资源的时域、频域、空域信息；2.分析频谱可用性变化规律，研究频谱状态预测技术。鉴于目前针对认知网动态频谱管理技术的研究仍存在许多关键技术难点与实际问题，因此本课题的研究具有重要的理论和实际意义。.目前已完成的研究工作包括：1.设计了一种适用于多主用户、多次级用户场景的协作频谱预测方案；2.研究了一种认知无线电网络中的频谱感知间隔的决策方法；3.提出一种基于信道质量预测的动态频谱接入方案。基于本项目已发表文章7篇，其中SCI期刊2篇，国际会议5篇，申请发明专利2项，完成预期研究计划。