Weight Based Channel Selection Towards 5G in the Unlicensed Spectrum  

作　　者：Yu Zeng Ting Zhou Honglin Hu Yang Yang Jinfeng Tian Zhenhong Li 

机构地区：[1]Shanghai Institute of Microsystem and Information Technology(SIMIT),Chinese Academy of Sciences,No.865 Changning Road,Changning District,Shanghai 200050,China [2]University of Chinese Academy of Sciences,No.19A Yuquan Road,Shijingshan District,Beijing 100049,China [3]Shanghai Advanced Research Institute(SARI),Chinese Academy of Sciences,No.99 Haike Road,Pudong District,Shanghai 201210,China [4]ShanghaiTech University,Shanghai 201210,China [5]TCL Communication Technology Holdings Ltd.Shanghai R&D Center,Building C,5-9F,No.232,Liangjing Road,Zhangjiang H igh-tech Park,Shanghai 201203,China

出　　处：《China Communications》2018年第8期54-66,共13页中国通信（英文版）

基　　金：partly supported by the National Science and Technology Major Project(grant no.16510711600);the National Natural Science Foundation of China(grant no.61631013);partly supported by the National Natural Science Foundation of China(grant no.61401440)

摘　　要：The growth of the wireless and mobile communication data traffic has brought severe challenges to the present telecommu- nication systems. To meet the ever-increasing mobile traffic demand in the next 5th generation （SG） communication systems, deploying 5G in the unlicensed spectrum （SG-U）, has been regarded as a promising technology. The Third Generation Partnership Project （3GPP） has specified the standardization of the Li- censed Assisted Access （LAA） and its extension enhanced LAA （eLAA）, to opportunistically transmit in the unlicensed spectrum. The LAA/eLAA systems share unlicensed spectrum resource with other networks, e.g., the Wi-Fi systems. In this article, we analyze the coexistence between the eLAA and the Wi-Fi systems in the unlicensed spectrum. We firstly establish the system model where the eLAA coexists with the Wi-Fi systems. Then, we theoretically derive and figure out the unfairness in the multi-channel occupancy rate between the eLAA and the Wi-Fi systems. After that, we propose a weight based channel selection method to improve the fairness of the coexistence. The numerical results demonstrate that by avoiding contentions and declining collisions, our method not only enhances the fairness, but also improves the overall unlicensed spectrum usage rate.The growth of the wireless and mobile communication data traffic has brought severe challenges to the present telecommunication systems. To meet the ever-increasing mobile traffic demand in the next 5 th generation(5 G) communication systems, deploying 5 G in the unlicensed spectrum(5 G-U), has been regarded as a promising technology. The Third Generation Partnership Project(3 GPP) has specified the standardization of the Licensed Assisted Access(LAA) and its extension enhanced LAA(e LAA), to opportunistically transmit in the unlicensed spectrum. The LAA/e LAA systems share unlicensed spectrum resource with other networks, e.g., the Wi-Fi systems. In this article, we analyze the coexistence between the e LAA and the Wi-Fi systems in the unlicensed spectrum. We firstly establish the system model where the e LAA coexists with the Wi-Fi systems. Then, we theoretically derive and figure out the unfairness in the multi-channel occupancy rate between the e LAA and the Wi-Fi systems. After that, we propose a weight based channel selection method to improve the fairness of the coexistence. The numerical results demonstrate that by avoiding contentions and declining collisions, our method not only enhances the fairness, but also improves the overall unlicensed spectrum usage rate.

关 键 词：5G unlicensed spectrum eLAA WI-FI multi-channel transmission 

分 类 号：TN929.5[电子电信—通信与信息系统]