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家庭基站中基于随机矩阵的能量动态检测频谱分配机制
丁凯,刘占军,李召义,胡腾
0
(重庆邮电大学 移动通信技术重庆市重点实验室,重庆 400065)
摘要:
针对家庭基站和宏基站并存的情况下会导致相互干扰以及协调使用频谱需要信令开销问题,提出了一种基于随机矩阵的频谱分配机制。该机制将动态的检测空闲频谱点的频谱感知技术应用于家庭基站和宏基站共存网络中,家庭基站在一个时间段内接收各个频点上的信号,利用随机矩阵能量动态检测频谱可用性,实时感知网络中的频谱空洞,生成可借用频谱点集合,选择业务请求用户服务质量高的家庭用户借用该集合。该方法以复杂度为代价,避免使用信令交互找到可用频谱,从而减少了网络信令开销。仿真结果表明所提机制能够提高网络容量和公平性以及网络链路效率。
关键词:  家庭基站  频谱分配  频谱感知  随机矩阵
DOI:
基金项目:国家高技术研究发展计划(863计划)项目(2014AA01A701) ;重庆邮电大学博士启动基金项目
Spectrum allocation mechanism based on dynamic detection of random matrix energy in femtocell base station
DING Kai,LIU Zhanjun,LI Zhaoyi,HU Teng
()
Abstract:
The coexistance of femtocell base station and the macro base station can cause mutual interference and coordination of spectrum requires signaling overhead. For the problems,a mechanism of spectral allocation based on random matrix is proposed. The mechanism applies dynamic idle spectrum points detection spectrum sensing techniques to femtocell base stations and macro base station coexistence networks. The femtocell base station receives signals at each frequency point within a period of time,then detects the spectrum availability dynamically by using random matrix energy and perceives the spectrum of holes in the network. Finally,the femtocell base station generates a collection of borrowable spectrum points,and selects the femtocell users whose quality of service request of the user service is high to borrow the collection. This method avoids using signaling to find available spectrum at the cost of complexity,thereby reducing network signaling overhead. Simulation shows that the mechanism can improve network capacity,fairness and network link efficiency.
Key words:  femtocell base station  spectrum allocation  spectrum sensing  random matrix
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