王爽, 张萌, 董宏峰, et al. Design and optimization of back-off algorithm based on Licensed Assisted Access[J]. 2015, 28(12): 83-87. DOI: 10.13992/j.cnki.tetas.2015.12.022.
基于Licensed Assisted Access技术的退避算法设计与优化
摘要
随着无线宽带网络的发展
移动数据业务疯狂增长
频谱资源紧缺
为了扩充LTE容量
提高频谱利用率
LAA技术
即在非授权频段部署LTE网络
与其它无线接入技术(如Wi-Fi技术)融合共存的问题
逐渐成为研究焦点。因此
竞争机制中退避算法的设计成为关键。本文主要针对Wi-Fi与LAA共存的场景
基于LBT竞争机制
设计了3种退避算法
并在ns-3仿真平台上实现仿真
对比纯Wi-Fi环境下的性能表现
对退避算法进行合理的优化。
Abstract
The expansion of wireless broadband access network deployments is resulting in increased scarcity of available radio spectrum. To expand LTE capacity
increase the service efficiency of spectrum
LAA deploy the LTE system in the unlicensed bands
coexist with other wireless access technologies(such as Wi-Fi)
which has become the focus of the research. Hence
It is the heart of the matter that how to design a reasonable competition mechanism on LAA system. This paper mainly studies the coexistence mechanism of running LTE and Wi-Fi system simultaneously in the unlicensed frequency bands and achieves the system-level simulation. Three kinds of back-off algorithms have been put forward and optimized.