Browse > Article

An Adaptive Coverage Control Algorithm for Throughput Improvement in OFDMA-based Relay Systems  

Hyun, Myung-Reun (서강대학교 통신시스템 연구실)
Hong, Dae-Hyoung (서강대학교 통신시스템 연구실)
Lim, Jae-Chan (서강대학교 통신시스템 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.9B, 2009 , pp. 876-882 More about this Journal
Abstract
In this paper, we propose a sub-cell coverage control algorithm for enhancement of the cell throughput in OFDMA based relay systems. Relay station (RS) is exploited for improved quality of the received signal in cellular communication systems, especially in shadow areas. However, since a RS requires additional radio resource consumption for the link between the base station (BS) and the RS, we have to carefully control the coverage areas if a mobile station (MS) is serviced via the BS or the RS considering the cell throughput. We consider radio resource reuse as well for the sub-cell coverage configuration by applying various reuse patterns between RSs. We also consider a time varying system by adaptively changing the threshold for coverage depending on the MSs' traffic in the cell. We initially determine the sub-cell coverage of the system depending on the ratio of received signal-interference-noise-ratio (SINR) of the MS from the BS and RSs, respectively. Then, the "sub-cell coverage threshold" varies based on the "effective transmitted bits per sub-channel" with time. Simulation result shows that the proposed "time varying coverage control algorithm" leads to throughput improvement compared to the fixed sub-cell coverage configuration.
Keywords
Relay; Multi-hop; Coverage; OFDMA; Reuse;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 3GPP2/TSG-C.R1002, '1xEV-DV Evaluation methodology(V14)', June 2003
2 현명륜, 최혜영, 홍대형, 임재찬 'OFDMA 기반 Relay 시스템에서 Throughput 성능 향상을 위한 적응적 커버리지 조절기법' 2009 한국통신학회하계종합학술발표회
3 S. Wang, H. Yin, and S. Sheu, 'An Effective Path Selection Metric for IEEE 802.16-based Multi-hop Relay Networks,' ISCC 2007. 12th IEEE Symposium on , pp.1051-1056, 1-4 July 2007   DOI
4 C. Koo, Y. W. Chung, 'Dynamic Cell Coverage Control for Power Saving in IEEE802.16 Mobile Multihop Relay Systems,' Systems and Networks Communications, 2006. ICSNC '06. International Conference on, Oct. 2006   DOI
5 H. M. Zimmermann, J. Eberspacher, and M. Lott, 'Frequency Reuse for Cellular Multi-hop Networks,' in Proc VTC 2005 Fall, pp. 2297-2301, Sept. 2005   DOI
6 M. Shim, H. Choi, and D. Hong, 'Reuse partitioning for throughput and fairness improvement in OFDMA based relay system,' Journal of IEEK (The Institute of Electronics Engineers of Korea), Vol. 44-TC, Issue 9, pp. 17-24, Sept. 2007   과학기술학회마을
7 'IEEE 802.16's Relay TG,' http://www.ieee802.org/16/relay/index.html
8 H. Hu, H. Yanikomeroglu, D. Falconer, and S. Periyalwar, 'Range extension without capacity penalty in cellular networks with digital fixed relays,' in Proc. IEEE Globecom 2004, vol.5, pp.3053-3057, Dec. 2004   DOI
9 N. Esseling, B.H. Walke and R.Pabst, 'Performance Evaluation of a Fixed Relay Concept for next generation wireless systems,' in Proc. IEEE PIMRC, vol.2, Sept. 2004
10 IEEE C802.20-05/61r1, 'QFDD Performance Report1'
11 3GPP, Technical Specification Group Radio Access Networks; Feasibility Study for Orthogonal Frequency Division Multiplexing (OFDM) for UTRAN enhancement(Release 6) (TR 25.892 v6.0.0), 2004
12 'IEEE 802.16 TG m,' http://www.ieee802.org/16/tgm/index.html