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Detection of Fault ONUs in TDM-PON Using CDMA Modulation Scheme  

Choi, Byung-Chul (국민대학교 전자공학부 광대역통신실험실)
Park, Jae-Uk (국민대학교 전자공학부 광대역통신실험실)
Chung, Jun-Hoi (국민대학교 전자공학부 광대역통신실험실)
Park, Young-Il (국민대학교 전자공학부 광대역통신실험실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.1A, 2008 , pp. 1-6 More about this Journal
Abstract
TDM-PON has a disadvantage that entire PON system gets into trouble when only one ONU is out of order and sends optical signal constantly. This paper suggests a scheme to find the fault location. TDMA is impossible when upstream traffic is interrupted by continuous wave signal from a troubled ONU. Therefore, CDMA coding is introduced in separating fault ONUs, and detection algorithm is verified.
Keywords
TDM-PON; Fault detection; CDMA;
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  • Reference
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