中继增强的无线蜂窝多小区系统的联合调度与功率控制算法  

Coordinated Scheduling and Power Control Algorithm for Relay-enhanced Cellular Network with Multicells

作　　者：黄晓燕[1] 毛玉明[1] 吴凡[1] 冷甦鹏[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都611731

出　　处：《电子与信息学报》2012年第7期1665-1671,共7页Journal of Electronics & Information Technology

基　　金：国家科技重大专项(2010ZX03005-001;2010ZX03005-002-01);新世纪优秀人才支持计划(NCET-10-0294)资助课题

摘　　要：针对采用全局频率复用的中继增强的无线蜂窝多小区系统,该文考虑多种通信模式并存的混合场景,提出了一种干扰感知的联合资源分配策略。以最大化系统总吞吐量为目标,同时考虑小区间干扰对中继节点与移动站点的影响,以及基站与中继节点各自的发射功率约束。为了降低计算复杂度,针对用户与中继节点配对问题提出了一种基于小区间干扰的调度算法;针对功率控制问题分别提出了一种基于符号规划的最优功率分配算法和一种次优的最小能耗功率分配算法。仿真结果表明,该文所提算法逼近最优资源分配,在系统吞吐量与能量效率等性能方面具有显著优势。This paper proposes an interference-aware joint resource allocation scheme for relay-enhanced multicell networks with universal frequency reuse and the coexistence of different communication modes. The design of resource allocation is formulated as a non-linear combinatorial optimization issue with the objective of maximizing the overall system throughput, subject to interference and noise impairments, and individual power constraints at both Base Stations （BSs） and Relay Stations （RSs）. To reduce the computational complexity, an inter-cell interference-based scheduling algorithm is proposed to address the user and relay pairing issue. Furthermore, a signomial programming-based optimal power allocation algorithm and a suboptimal minimal energy-consumption power allocation algorithm are devised as well. Numerical results indicate that the proposed algorithms approach to the optimal resource allocation, so that the system performance can be significantly improved in terms of network throughput and energy efficiency.

关 键 词：无线通信 无线中继 小区间干扰 用户调度 中继节点选择 功率控制 

分 类 号：TN92[电子电信—通信与信息系统]