基于SWIPT的多用户双向中继协作系统资源分配算法研究

RESOURCE ALLOCATION ALGORITHM BASED ON SWIPT IN TWO-WAY MULTI-USER RELAYING COOPERATIVE SYSTEM

在双向中继协作系统中,随着用户数和中继数量增加,节点间的传输干扰成为影响系统性能的不可忽略因素,如何考虑节点间传输干扰并设计合理的资源分配算法是提升性能的关键。对此设计一种实现简单、复杂度相对较低、可扩展性好的避免干扰资源分配算法RABST(Resource Allocation based on SWIPT and TDMA)。考虑了中继节点能量和信息的分配比例、传输功率等资源的分配,以及多用户的链路资源来提高链路的总传输速率和利用率。将RABST建模成优化问题并求解,优化了系统的资源分配并最大化了系统吞吐量。仿真实验证明了RABST可以有效地增大系统吞吐量。

In the two-way relaying cooperative system,as the number of users and relays increase,the transmission interference between nodes becomes a non-negligible factor affecting the performance of the system.How to design a reasonable resource allocation algorithm by considering the transmission interference between nodes is the key to improving performance.This paper designs a simple,relatively low complexity and scalable resource allocation algorithm(RABST)to avoid interference.It considered the ratio of energy and information,transmission power and the link resources of multi-users to improve total transmission rate and link utilization.By modeling the RABST as an optimization problem and solving it,the resource allocation of the system was optimized and the system throughput was maximized.Simulation experiments show that the RABST can increase system throughput significantly.