【资料名称】：LAPDm协议的实现方案

【资料作者】：王凯

【资料日期】：2012,。9

【资料语言】：英文

【资料格式】：DOC

【资料目录和简介】：

The Link Access Procedures on Dm channel (LAPDm) is the data link layer of GSM (Global System for Mobile Communications) cellular network. According to the requirements of virtual base station and 3GPP protocols, a modified scheme for implementing LAPDm on GSM virtual base station was proposed. The scheme can reduce the useless data link status and simplify the operational flow leading to higher reliability and efficiency. In this paper, we designed a framework for realizing the proposed scheme and presented detailed analyses about its program structure, status transition, errors detection and correction approach, timer and retransmission mechanism. Finally, the framework was ported to virtual base station platform and monitored by OT Drive software.