Load Control Scheme Using Rate Control for CDMA2000 1x System

CDMA2000 1x시스템에서 전송률제어를 이용한 부하제어 방식

  • Park, Hyung-Kun (Dept. of Information Technology Engineering, Korea University of Technology and Education)
  • Published : 2004.10.01

Abstract

In a CDMA system, the rapacity is variable and mainly depends on multiple access interference. The multiple access interference has a deep relationship with transmitted or received power. The capacity of CDMA2000 1x system is considered to be limited by the forward link capacity. In this paper, we show that the transmitted power can represent the total cell load and we propose a load control scheme for CDMA2000 1x system. CDMA2000 1x system has fast power control scheme and we can measure forward link cell load by using total transmitted power. In the proposed algorithm, by monitoring the total transmit power, we can simply adjust data rate to channel conditions and efficiently use radio resources. The proposed algorithm is practical algorithm to implement in the power controlled CDMA systems and enhances the system throughput and quality of service(QoS)

References

  1. 3GPP2 Physical layer standard for CDMA 2000 spread spectrum systems, 3GPP2 C.S0002-0 v.3.0, June 2001
  2. Ching Yao Huang, and Roy D. Yates, 'Call admission in power controlled CDMA system,' Proc. of VTC, pp.1665-1669, April 1996
  3. Wan Choi, Byung Shik Kang, Jun Cheol Lee, and Kuen Tae Lee, 'Forward link Erlang capacity of 3G CDMA system,' Proc. of 3GMobile Comm. Tech., pp. 213-217, March 2000
  4. Q. Shen and W. Krzymien, 'Optimal power assignment for maximum throughput in CDMA personal communication systems with integrated voice/ data traffic,' Wireless Personal Commun., vol. 8, pp. 277-289, Apr. 1998 https://doi.org/10.1023/A:1008892831909
  5. D. Jeong and W. Jeon, 'Rate controlled data transmission for IS-95 CDMA networks,' in VTC'97, pp. 1567-1571, May 1997
  6. S. Oh and K. Wasserman, 'Dynamic spreading gain control in multiservice cdma networks,' IEEE J. Select. Areas Commun., vol. 17, pp. 918-927, May 1999 https://doi.org/10.1109/49.768205
  7. J. Razavilar, R. Liu, and S. Marcus, 'Optimal rate control in wireless networks with fading channels,' in Proc. VTC'99, vol. 1, pp.807-813, May 1999
  8. Seong-Lyun Kim, Zvi Rosberg and Jens Zander, 'Combined Power Control and Transmission Rate Selection in Cellular Networks,' Proc. VTC, pp. 1653-1656, Sept. 1999.
  9. Lei Song, and Narayan B. Mandayam, 'Hierarchical SIR and Rate Control on the Forward Link for CDMA Data Users Under Delay and Error Constraints', IEEE JSAC Vol.19, No. 10, pp. 1871-1882, October 2001
  10. Kimmo Hitunen, and Riccardo De Bernardi, 'WCDMA downlink capacity estimation,' Proc. of VTC, pp. 992-996, May 2000