一种基于SDN的BBU-RRH动态分配算法
首发时间:2018-02-20
摘要:在云无线接入网(C-RAN)中,一个基带单元(BBU)可以为一组有限的射频拉远头(RRH)提供服务,BBU和RRH之间的逻辑连接应该是动态的,且随着网络负载的变化而变化的。针对该问题,将SDN控制器加入BBU池中,设计一种新型的基于SDN技术的C-RAN架构,并研究了BBU-RRH动态映射问题;将BBU-RRH动态映射制定为线性整数优化问题,并改进了离散粒子群(DPSO)算法作为解决优化问题的进化算法。仿真结果表明,本文算法可以有效改善网络性能。
关键词: 云无线接入网 BBU RRH 离散粒子群算法 软件定义网络
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A Dynamic BBU-RRH Allocation Algorithm Based on SDN
Abstract:In the Cloud Radio Access Network(C-RAN),One Base Band Unit(BBU) is capable of serving a finite set of Remote Radio Head(RRH) and mapping between BBU and RRH cluster should be dynamic and expected to alter with varying traffic and processing loads over time. Aiming at this issue, the SDN controller is added to the BBU pool and we design a novel C-RAN architecture based on SDN technology,and the dynamic mapping problem of BBU-RRH is studied. Dynamic BBU-RRH mapping is formulated as a linear integer-based constrained optimization problem. The Discrete Particle Swarm Optimization (DPSO) algorithm is improved as an evolutionary algorithm to solve the optimization problem. Simulation results show that the proposed algorithm can effectively improve the network performance.
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