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학술지 Two-Stage Resource Allocation to Improve Utilization of Synchronous OFDM-PON Supporting Service Differentiation
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저자
두경환, 방준성, 한만수, 이종현, 이상수
발행일
201508
출처
ETRI Journal, v.37 no.4, pp.657-666
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.15.0114.0922
협약과제
14MI9300, (통합)대용량 WDM 액세스망핵심 및 선행기술개발, 이상수
초록
We propose a two-stage resource allocation algorithm for the high link utilization of an orthogonal frequencydivision multiplexing passive optical network (OFDMPON). An OFDM-PON is assumed to use a synchronous frame structure in supporting service differentiation. In distributing resources, the proposed algorithm first allocates a time window for each optical network unit (ONU), and then it arranges a subchannel, which is a group of subcarriers. This algorithm needs to satisfy two constraints. First, computations for the resource allocation should be done using a frame unit. Second, an ONU has to use a single subchannel to send upstream data for multiple services within a frame duration. We show through a computer simulation that the proposed algorithm improves the link utilization.
키워드
OFDM-PON, RRsource allocation, Service differentiation, Synchronous frame, Utilization
KSP 제안 키워드
Computer simulation(MC and MD), Frame duration, Frame structure, OFDM-PON, Optical network unit(ONU), Orthogonal frequency division Multiplexing(OFDM), Passive optical network, Resource allocation algorithm, Service differentiation, Show through, Synchronous frame