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학술지 Two-Step Scheduling Scheme to Support Fairness and QoS in DVB-S2 System
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저자
박만규, 강동배, 오덕길
발행일
201511
출처
KSII Transactions on Internet and Information Systems, v.9 no.11, pp.4419-4435
ISSN
1976-7277
출판사
한국인터넷정보학회
DOI
https://dx.doi.org/10.3837/tiis.2015.11.009
협약과제
15MR2800, (통합)적응형 위성방송통신 전송 기술 개발, 오덕길
초록
The use of an efficient packet scheduling scheme for a forward link in satellite communication networks is very important to support fairness for each return channel satellite terminal (RCST) and the service differentiations for user traffics. To support fairness and QoS for each RCST with service-level agreement (SLA), the Adaptive Coding and Modulation (ACM) system in a satellite hub has to process packets with considering modulation and coding (MODCOD) and packet types. Although a DVB-S2 system with ACM scheme has higher transmission efficiency, it cannot offer fairness or quality of service (QoS) to RCSTs. Because the data are transmitted with high MODCOD in regions with clear skies, while data are transmitted using low MODCOD in regions experiencing rain events. In this paper, we propose a two-step scheduling scheme offering fairness and QoS to RCSTs, while minimizing a decrease in throughput. The proposed scheme is carried out performance evaluations using a computer simulation. As results of this simulation, the proposed scheduler was shown to support bandwidth fairness to an individual RCST, and provide a level of QoS differentiation for user traffics
키워드
ACM, DVB-S2, Fairness, QoS, Scheduling
KSP 제안 키워드
Adaptive Coding and Modulation(ACM), Computer simulation(MC and MD), DVB-S2, Forward link, Packet scheduling, Performance evaluation, QoS differentiation, Return channel, Scheduling Scheme, Service-level Agreement(SLA), Two-Step