상세정보
학술지
Analysis of Modulation Order to Guarantee Real-Time Service Throughputs in OFDMA-PON
- 저자
- 방준성, 박창수
- 발행일
- 201504
- 출처
- IEEE Communications Letters, v.19 no.4, pp.549-552
- ISSN
- 1089-7798
- 출판사
- IEEE
- 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.
- 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