Title :
Nonlinear power assignment and its impact on the capacity of multimedia CDMA systems
Author :
Li, Ying ; Zhu, Shihua ; Wang, Yonggrrng
Author_Institution :
Dept. of Inf. & Commun. Eng., Xi´´an Jiaotong Univ., China
Abstract :
When multimedia traffic is introduced into code division multiple access (CDMA) mobile networks, power should be assigned to users according to different bit rate and quality of service (QoS) requirements, in order to provide each user an acceptable connection. We derive the sufficient and necessary convergence condition for the power assignment algorithm taking into account only average signal-to-interference ratio (SIR) requirements, and study the normalized demand (demand-to-resource ratio) for a given outage probability requirement. Lower and upper bounds of the normalized demand are obtained and two new power assignment algorithms taking into account both average SIR and outage probability requirements are proposed. Numerical results confirm the advantage of the proposed algorithm
Keywords :
cellular radio; channel capacity; code division multiple access; convergence of numerical methods; multimedia communication; packet radio networks; power control; quality of service; telecommunication control; telecommunication traffic; QoS; average SIR; code division multiple access; convergence condition; demand-to-resource ratio; mobile networks; multimedia CDMA systems; multimedia traffic; nonlinear power assignment; normalized demand; outage probability; quality of service; signal-to-interference ratio; system capacity; 3G mobile communication; Bit rate; Communication system traffic control; Convergence; Multiaccess communication; Multimedia systems; Power control; Power distribution; Quality of service; Upper bound;
Conference_Titel :
Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-6394-9
DOI :
10.1109/ICCT.2000.889347
