优化传输性能的机会协作中继系统动态时间分配策略

doi:10.13190/j.jbupt.2019-007

北京邮电大学学报 ›› 2019, Vol. 42 ›› Issue (5): 36-41,99.doi: 10.13190/j.jbupt.2019-007

优化传输性能的机会协作中继系统动态时间分配策略

李陶深^1,2, 宁倩丽¹, 王哲¹

1. 广西大学计算机与电子信息学院, 南宁 530004;
2. 南宁学院信息工程学院, 南宁 530200

收稿日期:2019-01-16 出版日期:2019-10-28 发布日期:2019-11-25
作者简介:李陶深(1957-),男,教授,博士生导师,E-mail:l9920091@gxu.edu.cn.
基金资助:
国家自然科学基金项目（61762010）

Dynamic Time Allocation Strategy of Opportunity Cooperative Relay System for Optimizing Transmission Performance

LI Tao-shen^1,2, NING Qian-li¹, WANG Zhe¹

1. School of Computer, Electronics and Information, Guangxi University, Nanning 530004, China;
2. School of Information Engineering, Nanning University, Nanning 530200, China

Received:2019-01-16 Online:2019-10-28 Published:2019-11-25

摘要/Abstract

摘要： 为了优化能量收集无线网络传输性能，延长网络中能量受限型节点的生命周期，提出了一种基于解码转发策略的机会协作中继系统动态时间分配策略.在满足系统最低传输速率的约束下，推导出中断概率与时间分配系数之间的关系表达式；通过减小系统中断概率来优化时间分配系数，得出系统吞吐量和能量效率的表达式；设计了一种基于次优迭代的时间分配算法，实现问题的求解.仿真实验结果表明，在非理想信道状况下，所提出的策略有较高的系统吞吐量和能量效率，可优化无线网络的传输性能，提高可靠运行度.

关键词: 能量收集无线网络, 无线携能传输, 机会协作中继, 动态时间分配策略, 中断概率

Abstract: A dynamic time allocation strategy for opportunistic cooperative relay system was proposed to optimize the transmission and extend the life cycle of energy-constrained nodes in energy harvesting wireless network. The relationship between outage probability and time distribution coefficient was derived under the constraint of satisfying the minimum transmission rate of the system. By reducing the system outage probability, the time allocation coefficient was optimized and the expression of the system throughput and energy efficiency was deduced. A suboptimal iteration time allocation algorithm was designed to solve the problem. The simulation results show that the proposed strategy is of higher system throughput and energy efficiency under the non-ideal channel condition, which will optimize the transmission performance and improve the reliability of the system.

Key words: energy harvesting wireless network, simultaneous wireless information and power transfer, opportunity cooperative relay, dynamic time allocation strategy, outage probability

中图分类号:

TN393

李陶深, 宁倩丽, 王哲. 优化传输性能的机会协作中继系统动态时间分配策略[J]. 北京邮电大学学报, 2019, 42(5): 36-41,99.

LI Tao-shen, NING Qian-li, WANG Zhe. Dynamic Time Allocation Strategy of Opportunity Cooperative Relay System for Optimizing Transmission Performance[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2019, 42(5): 36-41,99.

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优化传输性能的机会协作中继系统动态时间分配策略

Dynamic Time Allocation Strategy of Opportunity Cooperative Relay System for Optimizing Transmission Performance

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