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Improvement of Upstream Bandwidth Utilization Using Two-Upstream-Wavelengths TDM-PON System  

Chung, Jun-Hoi (국민대학교 전자공학부 광대역통신 연구실)
Park, Jae-Uk (국민대학교 전자공학부 광대역통신 연구실)
Choi, Byung-Chul (국민대학교 전자공학부 광대역통신 연구실)
Yoo, Jea-Hoon (한국전자통신연구원 WPON기술팀)
Kim, Byoung-Whi (한국전자통신연구원 WPON기술팀)
Park, Young-Il (국민대학교 전자공학부 광대역통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.8B, 2008 , pp. 609-614 More about this Journal
Abstract
Upstream data frame of TDM-PON includes various types of overheads, and there exist guard bands between consecutive frames from different ONUs. Although they are indispensible in synchronization and performance, they cause bandwidth waste at the same time. To solve this problem, a new TDM-PON that uses two types of wavelengths in upstream transmission is suggested. By even distribution of two wavelengths among ONUs and overhead overlap between frames that use different wavelengths, almost 100% bandwidth efficiency could be achieved. A serializer that multiplexes signals from two wavelengths is implemented for this purpose.
Keywords
TDM-PON; Bandwidth Utilization; GE-PON; Overhead; Guard band;
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