D2D通信中基于RLE编码二叉树发现消息的设计

摘要

D2D (Device-to-Device)通信是通信网络中近邻设备之间直接进行信息交换的技术,它使得设备在具有相同且同处于激活状态应用程序的情况下,实现与邻近设备间的直接链路通信.针对大数据量的设备应用程序与有限频谱资源之间存在的矛盾,提出基于RLE编码二叉树结构构造发现消息的方法.通过使用应用程序标识值范围替代传统上使用的应用程序标识值,可以减少发现消息大小以提高节点发现的能力,并且在接收到邻近设备发送的发现消息时,通过解码后进行的迭代细分查找法可以达到快速查找的目的.最后通过理论分析和仿真实验进行了结果的正确性验证.%Device-to-device communication is the technology for directly exchanging information directly between the neighboring devices,which enables the devices to implement the direct communication between the device and the adjacent device in the case of the same and active application.However,due to the large data and limited resources,a method is proposed of discovering message based on RLE encoding binary tree structure,which is designed to realize the discovery message of the device under the adjacent service.Replacing the traditional application identity value by using an application's identity value range reduces the discovery message size and improves the discovery capability of the node,and is able to achieve a quick lookup by decoding the discovery messages that send by neighboring devices.The correctness of the proposed method is verified by theoretical analysis and experimental simulation.