Minimum Duration Outage of a DS-CDMA Cellular System Due to Cell Traffic Intensity

Cell Traffic Untensity 에 따른 DS-CDMA 셀룰러 시스템의 최소기간 차단율

  • Kim, Nam-Soo (Computer and Communication Eng., Chungju University)
  • Published : 2001.06.01

Abstract

The minimum duration outage probability of a cellular system is defined the probability that the received signal level is hold under minimum required threshold duration. This definition is more realistic compared to the outage probability which is the received signal strength level is below predefined threshold level. Especially, in a DS-CDMA cellular system the received signal-to-interference ratio is a function of cell traffic, while the former researches are only considered the minimum duration outage probability independent of the cell traffic. We noticed that the minimum outage probability is rapidly increases as cell traffic increase.

셀룰러 시스템에서 최소기간 차단율은 수신된 신호 레벨이 최소기간 이상 계속하여 임계치 이하로 될 확률을 의미한다. 이는 수신 신호만을 대상으로 하여 임계치 이하로 될 때는 오수신으로 정의하는 것보다 더욱 현실적이다. 특히 DS-CDMA 셀룰러 시스템에서는 셀의 통화량에 따라서 수신되는 신호대 간섭비가 계속하여 가변되는데 기존의 해석에서는 셀의 통화량과는 무관하게 최소기간 차단율을 해석하였으나, 이 논문에서는 셀의 통화량에 따른 최소기간 차단을 유도한다. 해석결과 셀의 통화량이 증가할수록 최소기간 오수신율을 급격히 증가함을 알 수 있었다.

Keywords

References

  1. Proc. of IEEE 5th International symposium on spread spectrum techniques and applications v.1 Outage evaluation in a CDMA cellular network employing a distributed channel access control protocol R. P. Narrainen;F. Takawira
  2. Proc. of WPWC' 00 Partially coherent MC-CDMA cownlink performance in Rayleigh fading channels N. S. Kim;D. K. Cho
  3. Proc. of Personal, Indoor and Mobile Radio Communications v.94 no.2 Outage probability for the uplink of a DS-CDMA system operating over a LEO mobile satellite channel B. R. Vojcic;L. B. Milstein;R. L. Pickholts
  4. Proc. of ITC-CSCC' 99 Soft handoff under cell breathing in DS-CDMA cellular network N. S. Kim
  5. IEEE Vehicular Technology Conference Minimum duration outage for cellular systems: A level crossing analysis N. B. Mandayam;Pi-Chun Chen;J. M. Holtzman
  6. Proceedings of ICUPC' 96 Minimum duration outage for cellular systems with reception diversity P. C. Chen;N. B. Mandayam;J. M. Holtzman
  7. IEEE Journal on Selected Areas in Communi. v.17 no.11 Duration of outage intervals in macrodiversity cellular systems F. Graziosi;F. Santucci
  8. IEEE Journal on Selected Areas in Communi. v.11 no.6 Erlang capacity of a power controlled CDMA system Audrey M. Viterbi;Andrew J. Viterbi
  9. IEEE Trans. on Veh. Technol. v.94 no.1 Capacity, throughput, and delay analysis of a cellular DS CDMA system with imperfect power control and imperfect sectorization M. Jansen;R. Prasad
  10. IEEE Trans. on Communi. v.42 no.2/3/4 Other-cell interference in cellular power controlled CDMA A. J. Viterbi;A. M. Viterbi;E. Zehavi
  11. Data network D. Bertsekas;R. Gallager
  12. CDMA principles of spread spectrum communication A. J. Viterbi
  13. Extremes and related properties of random sequences and processes M. R. Leadbetter;G. Lindgren;H. Rootzen