摘要
针对多小区场景下建立的跨小区D2D通信链路,由于距离或障碍物等因素引起的通信信道质量不佳的问题,引入中继技术,借助空闲的蜂窝用户做中继,建立D2D中继两跳通信链路。对D2D中继两跳链路的干扰情况进行分析,提出一种联合资源优化算法,通过选择合适的资源达到减小蜂窝通信对D2D通信干扰的目的。然后建立以最大链路速率为目标的联合优化模型,并引入对偶分解理论进行分析。通过发射功率与拉格朗日因子的相互迭代更新,得到功率控制和资源分配的联合优化。仿真结果表明,端到端的链路速率和频谱效率都能得到有效地提升。
Aiming at the bad channel tance or obstacle factors in multi-cell lular user served as a relay and estab quality caused by cross-cell D2D communication link due to disscenario, a relay technology is introduced by exploiting the idle cellishing a two-hop communication link. Based on the analysis of the interference of two-hop D2D link using relay, a joint resource optimization algorithm is investigated to reduce the interference of cellular communication to D2D communication by selecting the appropriate resource blocks. Then, a joint optimization model on the maximum link rate for the target is established and the dual decomposition theory is introduced to be analyzed. The joint optimization of the power control and the resource allocation is achieved by the iteration of the transmit power and the Lagrange factor, repectively. Simulation results show that both the link rate and throughput analysis of end-to-end path can be effectively improved.
出处
《南京邮电大学学报（自然科学版）》
北大核心
2017年第3期60-67,共8页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
重庆市自然科学基金(cstc2012jj A40054)资助项目
关键词
多小区
D2D通信
中继
干扰管理
联合优化
multi-cells
D2D communication
relay
interference management
joint optimization
作者简介
通讯作者：杨丰瑞,电话：023—81324059,E—mail：yangfengrui@cqcyit．com,杨丰瑞（1963-），男，重庆市人。重庆邮电大学通信新技术应用研究中心教授。主要研究方向为通信新技术应用。
