DocumentCode :
1851897
Title :
Power assignment strategies and traffic control for wireless multimedia DS-CDMA systems
Author :
Wong, Wilson W S ; Sousa, Elvino S.
Author_Institution :
Wireless Commun. Lab., Toronto Univ., Ont., Canada
Volume :
1
fYear :
1996
fDate :
15-18 Oct 1996
Firstpage :
188
Abstract :
We propose a wireless multimedia DS-CDMA system with dynamic power assignment (DPA) for adaptive traffic control. The system supports service groups with different quality of service (QoS) requirements specified in terms of both transmission bit rate and bit error rate (BER). The optimal received power level for each service group is obtained by minimizing a cost function consisting of the weighted sum of the blocking rates of different service groups subject to their QoS requirements. The performance is compared to a similar system with fixed power assignment (FPA) in which the received power level for each service group is assigned based only on its transmission bit rate. Simulation results show that DPA algorithm can support much higher offered traffic loads, on merit of the blocking probability. By implementing the cost function with different weighting coefficients, we can assign different blocking probabilities to different service groups to cope with the demands in the system. The DPA algorithm therefore plays the role of a “movable blocking boundary” in the system which can accommodate multimedia traffic and priority-based capacity access
Keywords :
adaptive control; code division multiple access; coding errors; error statistics; land mobile radio; multimedia communication; power control; probability; pseudonoise codes; spread spectrum communication; telecommunication congestion control; telecommunication traffic; BER; DPA algorithm; QoS requirements; adaptive traffic control; bit error rate; blocking probability; blocking rates; cost function; dynamic power assignment; fixed power assignment; mobile communication; movable blocking boundary; multimedia traffic; offered traffic loads; optimal received power level; priority-based capacity access; quality of service; service groups; simulation results; system performance; transmission bit rate; weighted sum; weighting coefficients; wireless multimedia DS-CDMA systems; Adaptive control; Bit error rate; Bit rate; Cost function; Multiaccess communication; Multimedia systems; Programmable control; Quality of service; Telecommunication traffic; Traffic control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1996. PIMRC'96., Seventh IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
0-7803-3692-5
Type :
conf
DOI :
10.1109/PIMRC.1996.567543
Filename :
567543
Link To Document :
بازگشت