Browse > Article
http://dx.doi.org/10.6109/jkiice.2008.12.2.360

Backoff-based random access algorithm for offering differentiated QoS services in the random access channels of OFDMA systems  

Lee, Young-Du (울산대학교 전기전자정보시스템공학부)
Koo, In-Soo (울산대학교 전기전자정보시스템공학부)
Abstract
In this paper, in order that the various QoS(Qualify of Service)s that are required by different traffic class are guaranteed in the random access channels in multi-service multi-user OFDMA systems, the backoff-based random access algorithm is proposed and corresponding performance is analyzed in terms of the access success probability, the throughput, the average delay and the blocking probability. Through the numerical analysis, it is shown that the proposed backoff-based random access algorithm can provide the differentiated QoSs to random access attempts according to their service class.
Keywords
OFDMA; back-off based random access; Quality of Service(QoS);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 IEEE standard for wireless LAN medium access control (MAC) and physical layer (PHY) specifications : High-speed physical layer 1 the 5GHz Band, IEEE Standard 802.11 a, 1999
2 G. Xuelin et. al., "A new random access system for TD-OFDMA systems," Proceedings of ISCIT, pp.689-692, 2005
3 I. Stavrakakis and D. Kazakos, "A multiuser random access communication system for users with different priories," IEEE Trans. Communications, pp. 1538-1541, 1991
4 G. Hwang, D. Choi, "Adaptive random channel allocation scheme in Hiperlan type 2," IEEE Communications letters, vol. 6, No.1, pp.40-42
5 김기남, 김진호, 조성준, "OFDMA 시스템 상향 링크의 레인징 부호 검출 성능 향상 기법," 한국통신학회논문지, Vol.31, No.6A, 2006   과학기술학회마을