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학술지 QoE-Aware Scheduling for Sigmoid Optimization in Wireless Networks
Cited 12 time in scopus Download 0 time Share share facebook twitter linkedin kakaostory
저자
이길수, 김홍석, 조윤희, 이승환
발행일
201410
출처
IEEE Communications Letters, v.18 no.11, pp.1995-1998
ISSN
1089-7798
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LCOMM.2014.2354409
협약과제
14MI9100, (통합)초연결 스마트 모바일 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
초록
This letter proposes a quality-of-experience (QoE)-aware scheduler that maximizes the average number of satisfied users. QoE is different from quality-of-service (QoS) in that QoE is determined by users' subjective satisfaction while QoS is objectively measured. Hence, users' satisfaction needs to be incorporated into the scheduler to better understand QoE maximization. In this regard we propose a simple but effective user participation scheme exploiting one-bit feedback that indicates user's satisfaction upon the end of service. Then, user-centric QoE function is derived, which serves our objective function. Assuming that the QoE function can be successfully modeled by a sigmoid function we solve the non-convex sigmoid optimization. We show that, interestingly, adding non-trivial fairness constraints for starvation prevention can convexify the problem, and we obtain the unique optimal solution. By comparing the case without user participation we show that user participation can substantially improve the total QoE, e.g., nearly 100% improvement of the low 10 percentile users and 40% improvement of the low 50 percentile users.
KSP 제안 키워드
Non-convex, Optimal Solution, QoE maximization, Satisfied users, User-Centric, Wireless network, fairness constraints, objective function, one-bit feedback, quality of experience(QoE), quality of service(QoS)