基于竞争接入技术的LTE与Wi-Fi在未授权频段的共存研究  

An Overview of LAA-based LTE and Wi-Fi Co-Existence in Unlicensed Band

作　　者：秦子超 李艾静 王海 QIN Zi-chao;LI Ai-jing;WANG Hai(Army Engineering University of PLA,Nanjing Jiangsu 210007,China)

机构地区：[1]陆军工程大学,江苏南京210007

出　　处：《通信技术》2020年第10期2461-2466,共6页Communications Technology

基　　金：国家自然科学基金项目(No.61702545)。

摘　　要：信息化时代,智能设备在人们生活中发挥着重要作用。无论是LTE网络还是Wi-Fi网络,都为给用户提供更好更优质的服务而在不断发展。然而,尽管有很多技术已经用于提高频谱利用率,在授权频段工作的LTE网络仍然面临频谱资源紧缺的问题。将LTE的工作频段扩展到未授权频段是一个可行的解决方案,而当前已经有多种技术为LTE与Wi-Fi在未授权频段的共存提供技术支持,其中基于先听后发的授权频段辅助接入技术是目前比较合理且合适的一种共存机制。因此,全面分析该共存机制的关键技术及参数配置,并基于竞争接入信道的思路,提出通过时域-频域二维表的方式来交互控制信息,从而实现竞争接入信道的效果,为LTE与Wi-Fi的共存提供一种新思路。In the information age,intelligent devices play a very important role in people’s life.Both LTE network and Wi-Fi network are developing continuously to provide users with better and better service quality.However,although many technologies have been used to improve the spectrum utilization,LTE networks working in authorized frequency bands are still facing the problem of the shortage of spectrum resources.It is a feasible solution to extend LTE’s working frequency band to unlicensed frequency band.At present,there are many technologies providing technical support for the coexistence of LTE and Wi-Fi in the unauthorized frequency band.Among them,the authorized band auxiliary access technology based on listening before sending is a reasonable and suitable coexistence mechanism.Therefore,the key technology and parameter configuration of the co-existence mechanism are comprehensively analyzed.Based on the idea of competitive access channel,a two dimensional table of time-domain and frequency-domain is proposed to interact control information,so as to achieve the effect of competitive access channel,and provide a new idea for the coexistence of LTE and Wi-Fi.

关 键 词：共存 未授权频段 竞争接入 正交频分复用 

分 类 号：TN929.5[电子电信—通信与信息系统]