摘要: |
HFC(Hybrid Fiber Coax)为多媒体和宽带业务提供了一种宽带接入方式。本文论述了HFC接入网的结构和频谱安排,并结合HFC接入网的双向改造,对媒体接入层(MAC)和物理层(PHY)进行了具体分析,同时给出DOCSIS(Data-Over-Cable Service Interface Specification)规范中MAC协议解决上行信道分配问题的实现方法以及物理层的方案;最后,给出了符合DOCSIS规范的CM(Cable Modem)和CMTS(Cable Modem Terminal System)的软件和硬件实现方案。 |
关键词: 有线电视网络 双向HFC接入网 通信网 电缆调制解调器 DOCSIS |
DOI:10.3969/j.issn.1001-893X. |
修订日期:2001-05-16 |
基金项目: |
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Design and Realization of CM and CMTS Based on DOCSIS |
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Abstract: |
HFC (Hybrid Fiber Coax) provides a kind of broadband access way for multimedia and broadband services. The structure and the spectrum allocation scheme of HFC are described. The MAC layer and PHY layer of dual-direction HFC network are analyzed in detail. The upstream channel allocation scheme in MAC and the scenario of PHY in DOCSIS (Data-Over-Cable Service Interface Specification) are presented. Finally, The software and hardware designs of CM (Cable Modem) and CMTS (Cable Modem Terminal System) conforming to DOCSIS are given. |
Key words: CATV network,Dual HFC access network,Design |