D2D-U: Device-to-Device Communications in Unlicensed Bands for 5G System

被引：115
|
作者：
Zhang, Hongliang [1 ]
Liao, Yun [1 ]
Song, Lingyang [1 ]
机构：
[1] Peking Univ, Sch Elect Engn & Comp Sci, Beijing 100871, Peoples R China
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2017年 / 16卷 / 06期
关键词：
Device-to-device unlicensed; carrier aggregation; resource allocation; matching theory; LTE; MANAGEMENT;
D O I：
10.1109/TWC.2017.2683479
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Device-to-device (D2D) communication, which enables direct communication between nearby mobile devices, is an attractive add-on component to improve spectrum efficiency and user experience by reusing licensed cellular spectrum in 5G system. In this paper, we propose to enable D2D communication in unlicensed spectrum (D2D-U) as an underlay of the uplink LTE network for further booming the network capacity. A sensing-based protocol is designed to support the unlicensed channel access for both LTE and D2D users. We further investigate the subchannel allocation problem to maximize the sum rate of LTE and D2D users while considering their interference to the existing Wi-Fi systems. Specifically, we formulate the subchannel allocation as a many-to-many matching problem with externalities, and develop an iterative user-subchannel swap algorithm. Analytical and simulation results show that the proposed D2D-U scheme can significantly improve the system sum rate.
引用
收藏
页码：3507 / 3519
页数：13
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