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http://dx.doi.org/10.6109/JKIICE.2009.13.8.1549

Implementation of a DBA Algorithm with the Maximum Link Bandwidth Allocation in the G-PON  

Chung, Hae (금오공과대학교 전자공학부)
Hong, Jung-Ho (아이쓰리시스템(주))
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.13, no.8, 2009 , pp. 1549-1560 More about this Journal
Abstract
In the TDMA PON system, the DBA is essential for ONUs to send data efficiently to the upstream. In this paper, we implement a DBA processor for the G-PON OLT with downstream and upstream rate, 2.5 and 1.25 Gbps, respectively, The processor collects bandwidth request messages from ONUs at every cycle time and allocates properly bandwidth to each Alloc-ID with considering priority and fairness for traffics. In the proposed DBA algorithm, one cycle time consists of multiple G-PON frames ($m{\times}125{\mu}s$) for high link efficiency. In particular, the link efficiency is higher because the algorithm adopts a method that an additional overhead is eliminated when an allocated bandwidth is laid between two G-PON frames for an ONU. This enables that the processor flexibly allocates the bandwidth from zero to the maximum link capacity for an ONU. The proposed DBA processor is implemented with the FPGA and shows bandwidth allocating processes for ONUs with logic analyzer.
Keywords
G-PON; DBA; Cycle time; Time slot assignment;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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