G.SHDSL接口卡多PVC的设计与实现  

The Design and Implementation of Multiple PVC G.SHDSL Interface Card

作　　者：周莹莹[1] 姜珊[1] 

机构地区：[1]中国石油大学(北京)地球物理与信息工程学院电子工程系,北京102249

出　　处：《科学技术与工程》2010年第34期8451-8456,共6页Science Technology and Engineering

摘　　要：G.SHDSL利用现有双绞线支持最大5.7Mb/s的对称接入速率,可以解决现有DSL上下行速率不对称和传输距离近的缺点,满足双向对称的商用宽带需求。描述了在PPPOEOA协议模式下,通过硬件逻辑及软件设计,增加以太网私有协议头,用户端设备G.SHDSL接口卡实现配置条多条PVC的方式。详细阐述了其关键技术的设计与实现。验证结果表明本系统每条PVC均可承载流量,且能完全满足对称高速率的远距离传输要求。Using existing twisted pair,G.SHDSL can support the maximal symmetrical speed of 5.7 Mb/s both in upstream and downstream.It can resolve the disadvantages of asymmetrical transmission speed and short distance existed in present DSL so as to meet the reduirement of symmetrical bandwidth for commerce.In the mode of PPPoE over AAL5,by means of adding private protocol on the head of ethernet standard protocol,customer premise equipment—G.SHDSL interface card could config multiple permanence virtual circuits,the designs of the key technologies were expounded in detail too.The result proves that each PVC can carry data traffic,and can totally satisfy the transmission of high symmetrical speed and far distance.

关 键 词：单线对高速数字用户线 异步传输模式 永久虚电路 快速以太网 收发 

分 类 号：TP334.7[自动化与计算机技术—计算机系统结构]