在LTE-Advanced网络下的Device-to-Device通信

Device-to-Device（D2D）通信是一种在系统的控制下,允许终端之间通过复用小区资源直接进行通信的新型技术,它能够增加蜂窝通信系统频谱效率,降低终端发射功率,在一定程度上解决无线通信系统频谱资源匮乏的问题。与其他应用于非许可频段的同类技术相比,D2D具有干扰可控等优点。文章对D2D技术原理进行了介绍,阐述了它应用的必要性和应用场景、它对比同类技术的优点,以及在应用中的关键问题。

Device-to-Device Communication as an Underlay to LTE-Advanced Networks

Device-to-Device（D2D） communication is a new technology that allows terminals communicate with each other directly by reusing the radio resources under the control of the system.It can reduce the transmit power of the terminals,and increase the spectrum efficiency of communication system,which solves the problem of spectrum scarcity to a certain extent.Comparing with other similar technologies that use non-licensed frequency,D2D communication has the advantage of controlled interference.This paper introduces the key elements of D2D communication,explains the necessity of its application and usable scenarios,describes the advantages of D2D communication comparing with other similar technologies,and points out the key issues of its application.