상세정보
학술지
Subchannel Multiplexing Scheme for Mobile Broadband Wireless Access Service in AMC-based OFDMA System
- 저자
- 김동회, 강충구
- 발행일
- 200507
- 출처
- IEICE Transactions on Communications, v.E88-B no.7, pp.2810-2818
- ISSN
- 0916-8516
- 출판사
- 일본, 전자정보통신학회 (IEICE)
- 협약과제
- 05MM1100, 4세대 이동통신 기술개발, 황승구
- 초록
- In the adaptive modulation and coding (AMC)-based orthogonal frequency division multiple access (OFDMA) system for broad-band wireless service, a large number of users with short packets cause a serious capacity mismatch problem, which incurs resource under-utilization when the data rate of subchannel increases with a better channel condition. To handle the capacity mismatch problem, we propose an AMC-based subchannel multiplexing (ASM) scheme, which allows for sharing the same subchannel among the different simultaneous flows of the same user. Along with the ASM scheme, we also consider multi-class scheduling scheme, which employs the different packet scheduling algorithm for the different service class, e.g., packet loss rate-based (PLR) scheduling algorithm for real-time (RT) service and modified minimum bit rate-based (MMBR) scheduling algorithm for non-real-time (NRT) service. In the typical integrated service scenario with voice, video, and data traffic, we have shown that the proposed schemes significantly improve the overall system capacity. Copyright © 2005 The Institute of Electronics, Information and Communication Engineers.
- KSP 제안 키워드
- Adaptive Modulation and Coding(AMC), Bit Rate, Broadband Wireless Access(BWA), Class scheduling, Data traffic, Frequency division multiple access(FDMA), Information and communication, Integrated Services(InterServ), MisMatch problem, Mobile Broadband, Number of users