基于中继节点辅助的Femtocell混合接入控制算法

发布时间：2018-01-05 01:00

本文关键词：基于中继节点辅助的Femtocell混合接入控制算法　出处：《通信学报》2017年01期 　论文类型：期刊论文

【摘要】：针对异构网络融合环境提出一种基于中继节点辅助的毫微微蜂窝(Femtocell)混合接入控制算法,为Femtocell网络相邻用户(NUE,neighboring user)提供较好的性能支持。该算法将中继节点部署在网络外围的架构,通过中继放大转发或直传链路的传播方式对NUE进行数据传输,并设置Femtocell网络注册用户(FUE,Femtocell user)的Qo S门限值、宏蜂窝用户(MUE,Macrocell user)的跨层同频干扰容忍门限值以及Femtocell基站(FBS,Femtocell base station)下行总功率受限为约束,将上述资源分配问题建模成最优化问题,通过采用对偶分解算法进行求解,并将直传与中继放大转发模式相结合,从而适用于多用户多基站环境下Femtocell混合接入。仿真结果显示,所提算法不仅能够对FUE的Qo S进行保护,还能有效降低对MUE的跨层同频干扰,而且动态、灵活地改变NUE的接入模式,较大幅度地提高NUE的系统性能,且在一定区域内采用中继转发链路获得的数据传输速率要比采用传统直传链路的数据速率高约25%左右。
[Abstract]:A hybrid access control algorithm based on relay node assisted femto cell is proposed for heterogeneous network fusion environment. It is a nue for adjacent users of Femtocell network. Neighboring users provide better performance support. This algorithm deploys relay nodes to the architecture around the network. The NUE is transmitted through the transmission mode of relay amplifying, forwarding or direct transmission link, and the registered user of Femtocell network is set up. The QoS threshold for Femtocell users is the macro cellular user's mue. The cross-layer co-frequency interference tolerance threshold for Macrocell users and the Femtocell base station. Femtocell base station) is constrained by the total power. The above resource allocation problem is modeled as an optimization problem, which is solved by dual decomposition algorithm. Combining direct transmission with relay amplification and forwarding mode, it is suitable for Femtocell hybrid access in multi-user and multi-base station environment. The simulation results show. The proposed algorithm can not only protect the QoS of FUE, but also effectively reduce the cross-layer co-frequency interference to MUE, and dynamically and flexibly change the access mode of NUE. The system performance of NUE is greatly improved, and the data transmission rate obtained by using relay forwarding link in a certain area is about 25% higher than that of traditional direct link.
【作者单位】：东南大学移动通信国家重点实验室;山东科技大学电子通信与物理学院;美国加利福尼亚州立大学洛杉矶分校信息系统实验室;
【基金】：国家自然科学基金资助项目(No.61471164,No.61401399) 中央高校基本科研业务费专项资金资助江苏省普通高校研究生科研创新计划基金资助项目(No.KYLX_0133) 山东科技大学人才引进科研启动基金资助项目(No.2016RCJJ010)~~
【分类号】：TN929.5
【正文快照】： 3.美国加利福尼亚州立大学洛杉矶分校信息系统实验室,美国洛杉矶90001)第1期刘诚毅等:基于中继节点辅助的Femtocell混合接入控制算法·55·1引言毫微微蜂窝网络(Femtocell)作为一种极具有应用价值的技术,能够在传统的宏蜂窝网络(Macrocell)盲区和室内环境中提供无线宽带接入覆

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