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학술지 Analysis of Modulation Order to Guarantee Real-Time Service Throughputs in OFDMA-PON
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저자
방준성, 박창수
발행일
201504
출처
IEEE Communications Letters, v.19 no.4, pp.549-552
ISSN
1089-7798
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LCOMM.2015.2401561
초록
In an orthogonal frequency-division multiple access passive optical network (OFDMA-PON), each optical network unit (ONU) chooses a modulation format based on the signal-to-noise ratio (SNR) at its receiver. An ONU with a high SNR can use a high-order modulation format to increase its transmission efficiency. When upstream resources are fully utilized, this increases an aggregated upstream throughput by ONUs, but the throughput is varied by ONUs' modulation orders. To guarantee upstream throughputs of real-time services, we first estimate the network throughout in a case that a total upstream resource is fully and fairly distributed to ONUs. By using the estimation, then, we present the lowest order of available modulation formats for the throughput guarantee. We investigate how the modulation order affects the number of ONUs that can be serviced in the OFDMA-PON.
키워드
Modulation order, optical network unit (ONU), orthogonal frequency-division multiple access passive optical network (OFDMA-PON), throughput
KSP 제안 키워드
Frequency division multiple access(FDMA), High order modulation, Modulation format, Modulation order, OFDMA-PON, Optical network unit(ONU), Orthogonal Frequency Division Multiple Access(OFDMA), Passive optical network, Signal noise ratio(SNR), Signal-to-Noise, high SNR