| 摘要: |
| 在POS(Packet over SDH）设计实现中通常采用PPP/HDLC进行数据封装，这种方式通过标志以及字节填充实现对数据帧的定界，会遇到易受攻击和不适用于STM-16以上的高速链路处理等问题。针对HDLC的缺点，IETF建议了一种新的数据链路封装协议--SDL（Simple Data Link），它具有实现复杂度低、更适合于高速链路处理等优点。本文介绍了SDL的结构特点，并深入分析了SDL的同步性能。 |
| 关键词: 光传输网 同步数字系列 简单数据链路封装 帧结构 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:October 11, 2001 |
| 基金项目:国家自然科学基金 (项目编号 6 9896 2 4 2 )资助 |
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| Characteristics and Synchronous Performance of SDL |
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| Abstract: |
| Generally, packet over SDH (POS) protocol stack uses high-level data link control (HDLC) framing mechanism, which delineates protocol data units (PDUs) by means of a special bit pattern (flag) and byte stuffing operation. Nevertheless, this mechanism tends to be attacked and not suitable for higher-speed link over STM-16. Simple Data Link (SDL), a novel and effective protocol for framing asynchronous variable/fixed length packets, is recommended by IETF. In this paper, the characteristics of SDL are introduced and its synchronous performance is evaluated particularly. |
| Key words: Optical transmission network,SDH,SDL protocol,Frame structure, |
