基于D2D通信的流量卸载技术综述

Survey of D2D-based Traffic Offloading

随着各类移动终端与高带宽需求业务的普及,蜂窝网流量已呈现出爆炸性增长的趋势;同时,由于网络用户分布不均匀,蜂窝网流量分布也存在不均衡的现象。基于D2D(Device-to-Device)通信的流量卸载(Traffic offloading)是解决数据流量急剧增加和不均匀分布的一种经济、有效的技术。首先,根据D2D通信在流量卸载中所承担的任务,将基于D2D通信的流量卸载技术分为以D2D通信为目标和以D2D通信为中继两类;然后,详细介绍每一类技术的研究现状并分析讨论各自的优缺点;最后,提出下一步的潜在研究方向。

With the drastic growth of mobile smart devices and widespread use of various video traffic,the next generation wireless networks will face the explosive increase of data traffic.Meanwhile,the uneven distribution of users leads to an unbalanced distribution of cellular traffic.Device-to-device(D2D)-based traffic offloading is a cost-effective technique to solve the surging cellular traffic and unbalanced traffic distribution.Firstly,according to the role of D2D in traffic offloading,this paper divided D2D-based traffic offloading into two categories,i.e.,regarding D2D communication as target and regarding D2D communication as relaying.Secondly,this paper provided a detailed overview of the advantages and disadvantages of each category.Finally,this paper proposed potential research directions in D2D-based traffic offloading.