Title :
Adaptive service rate for soft handoff cellular CDMA systems over Nakagami-m fading channels
Author :
Tsai, Tsung-Hua ; Wu, Tsan-Ming
Author_Institution :
Dept. of Electr. Eng., Chung Yuan Christian Univ., Chung-Li
Abstract :
A novel efficient call admission control (CAC) scheme for the soft handoff mechanism in cellular code-division multiple-access (CDMA) systems over Nakagami-m fading channels with the impact of the Doppler frequency is proposed. Equipped with a soft handoff queue, a continuous-time Markov chain (CTMC) model for the CAC which is modified by an adaptive service rate algorithm against the Doppler frequency degradation is discussed. Computer calculations for the new call blocking probability and the handoff dropping probability have been evaluated to confirm our new design.
Keywords :
Markov processes; Nakagami channels; cellular radio; code division multiple access; telecommunication congestion control; Doppler frequency degradation; Nakagami-m fading channels; adaptive service rate; call blocking probability; cellular code-division multiple-access systems; continuous-time Markov chain model; efficient call admission control scheme; handoff dropping probability; soft handoff cellular CDMA systems; Adaptive control; Call admission control; Degradation; Fading; Frequency conversion; Frequency estimation; Multiaccess communication; Probability; Programmable control; Traffic control; Cellular CDMA; Doppler frequency; Nakagami-m; fading channels; soft handoff;
Conference_Titel :
Consumer Electronics, 2008. ISCE 2008. IEEE International Symposium on
Conference_Location :
Vilamoura
Print_ISBN :
978-1-4244-2422-1
Electronic_ISBN :
978-1-4244-2422-1
DOI :
10.1109/ISCE.2008.4559520
