Open AccessTwo‐Stage Resource Allocation to Improve Utilization of Synchronous OFDM‐PON Supporting Service Differentiation
Author(s) -
Doo KyeongHwan,
Bang Junseong,
Han Man Soo,
Lee Jonghyun,
Lee Sangsoo
Publication year - 2015
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.15.0114.0922
Subject(s) - orthogonal frequency division multiplexing , computer science , frame (networking) , passive optical network , resource allocation , computer network , upstream (networking) , optical line termination , service (business) , real time computing , statistical time division multiplexing , multiplexing , wavelength division multiplexing , telecommunications , channel (broadcasting) , wavelength , physics , economy , optoelectronics , economics
We propose a two‐stage resource allocation algorithm for the high link utilization of an orthogonal frequency‐division multiplexing passive optical network (OFDM‐PON). 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.