A traffic model for CDMA cellular systems with soft capacity taken into account

Author

Narrainen, Rosy Pillay ; Takawira, Fambirai

Author_Institution

Dept. of Electr. & Electron. Eng., Natal Univ., Durban, South Africa

Volume

1

fYear

2000

fDate

36770

Firstpage

325

Abstract

DS-CDMA cellular networks are known to have time-varying interference-limited capacity. However, many papers in the literature have either assumed an infinite capacity or a fixed average value of capacity when mathematically analysing CDMA systems. We derive a more exact traffic model which take into account the soft nature of CDMA capacity and include slow fading. Using the central limit theorem, the system interference statistics are derived. The call blocking performance of the cellular network is then derived for three different call admission schemes

Keywords

cellular radio; channel capacity; fading channels; multiuser channels; queueing theory; radio networks; radiofrequency interference; spread spectrum communication; statistical analysis; telecommunication congestion control; telecommunication traffic; CDMA capacity; CDMA cellular systems; DS-CDMA cellular networks; call admission schemes; call blocking performance; central limit theorem; nonstationary M/M/C queue; slow fading; soft capacity; system interference statistics; time-varying interference-limited capacity; traffic model; Africa; Base stations; Call admission control; Fading; Frequency; Interference; Land mobile radio cellular systems; Multiaccess communication; Traffic control; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on

Conference_Location

Parsippany, NJ

Print_ISBN

0-7803-6560-7

Type

conf

DOI

10.1109/ISSSTA.2000.878138

Filename

878138