DocumentCode :
1481876
Title :
Performance evaluation of wireless multimedia CDMA networks using adaptive transmission control
Author :
Wu, Jianming ; Kohno, Ryuji
Author_Institution :
Div. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
Volume :
14
Issue :
9
fYear :
1996
fDate :
12/1/1996 12:00:00 AM
Firstpage :
1688
Lastpage :
1697
Abstract :
When multimedia information including speech, image, data etc. are transmitted, the difference in information rates, required quality, and traffic performance should be taken into account. A wireless spread spectrum system can achieve a flexible balance of these differences because of inherent asynchronous code-division multiple-access (CDMA) capability. In order to accomplish wireless multimedia communication, three parameters are investigated: the transmission power, packet length, and time slot. We propose and investigate two methods to accomplish wireless multimedia communication by using these parameters: (1) a method based on control of both transmission power and transmission packet length and (2) a method based on control of both transmission power and adaptive time slot. We derive the optimal transmission packet length and transmission power in (1) and derive optimal adaptive time slot and transmission power in (2) by using traffic of measurement and nonlinear programming. By the comparison, the two proposed methods are compared to the minislotted alternating priority (MSAP). Numerical results demonstrate that the proposed methods, when the priority of each medium is graded, show better performance than other systems in terms of average throughput and delay time of all media
Keywords :
adaptive control; code division multiple access; delays; multimedia communication; nonlinear programming; packet radio networks; power control; pseudonoise codes; spread spectrum communication; telecommunication control; telecommunication traffic; DS-CDMA; adaptive time slot control; adaptive transmission control; asynchronous code division multiple access; average throughput; delay time; information rates; minislotted alternating priority; multimedia information transmission; nonlinear programming; optimal adaptive time slot; optimal transmission power; packet length control; performance evaluation; traffic performance; transmission power control; wireless multimedia CDMA networks; wireless multimedia communication; wireless spread spectrum system; Adaptive control; Communication system control; Information rates; Multiaccess communication; Multimedia communication; Programmable control; Speech; Spread spectrum communication; Telecommunication traffic; Wireless communication;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/49.545691
Filename :
545691
Link To Document :
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