基于业务类型的无线ATM差错控制技术研究  

Research on Error Control Scheme for Wireless ATM Based on Service Type

作　　者：顾青[1] 王思兵[1] 李建华[1] 诸鸿文[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《通信技术》2000年第4期27-31,共5页Communications Technology

基　　金：上海市科技发展基金!(编号 98JC14008)

摘　　要：首先分析了无线 ATM技术在差错控制方面存在的问题；然后在此基础上设计了基于业务类型的无线 ATM差错控制方案，针对不同类型的业务采用级联前向纠错 FEC或 FEC与自动反馈重传 ARQ相结合的技术。在该差错控制方案中，设计了信道级 FEC和信元级 FEC来保证实时型业务所需的误比特率，同时采用信道级 FEC和信元级 ARQ相结合的方式来保证非实时型数据业务所需的服务质量。最后通过解析分析和计算机仿真，验证了该差错控制方案的有效性和可行性。In the wireless ATM network, one of the key issues is to guarantee various QoS under the condition of the error prone characteristics. In this paper, the error control scheme based on the service type is introduced into wireless ATM. This scheme designs two level FEC, the channel－ level FEC and the cell－ level FEC to guarantee bit error rate for real time application. It also combines the channel－ level FEC and the cell－ level ARQ for non－ real time data communication to guarantee its QoS. Through computer simulation, it is confirmed that this error control scheme of wireless ATM can support efficiently for various type of ATM service.

关 键 词：无线ATM 差错控制 业务类型 无线通信 

分 类 号：TN92[电子电信—通信与信息系统] TN915.2[电子电信—信息与通信工程]