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학술지 QoS-Guaranteed Multiuser Scheduling in MIMO Broadcast Channels
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저자
이승환, John Thompson, 김진업
발행일
200910
출처
ETRI Journal, v.31 no.5, pp.481-488
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.09.0109.0017
협약과제
08MR5400, 이동통신 무선접속방식의 환경 적응형 자율제어 기술 연구, 김진업
초록
This paper proposes a new multiuser scheduling algorithm that can simultaneously support a variety of different quality-of-service (QoS) user groups while satisfying fairness among users in the same QoS group in MIMO broadcast channels. Toward this goal, the proposed algorithm consists of two parts: a QoS-aware fair (QF) scheduling within a QoS group and an antenna trade-off scheme between different QoS groups. The proposed QF scheduling algorithm finds a user set from a certain QoS group which can satisfy the fairness among users in terms of throughput or delay. The antenna tradeoff scheme can minimize the QoS violations of a higher priority user group by trading off the number of transmit antennas allocated to different QoS groups. Numerical results demonstrate that the proposed QF scheduling method satisfies different types of fairness among users and can adjust the degree of fairness among them. The antenna trade-off scheme combined with QF scheduling can improve the probability of QoS-guaranteed transmission when supporting different QoS groups.
키워드
Broadcast channel, dirty paper coding (DPC), Fairness, Multiple input multiple output (MIMO), Multiuser scheduling, Quality-of-service (QoS), Weighted sum-rate capacity