Title :
Resource allocation with adaptive QoS for multimedia transmission over W-CDMA channels
Author :
Zhang, Qian ; Zhu, Wenwu ; Wang, Guijin ; Zhang, Ya-Qin
Author_Institution :
Beijing Sigma Center, Microsoft Res. China, Beijing, China
Abstract :
This paper addresses the important issues of resource allocation and rate adaptation for multiple media, such as audio, video, email, and Web traffic, transmitted over W-CDMA (wideband code division multiple access) channel with adaptive QoS (quality of service) support. In order to have QoS support for different types of media, we develop an architecture combining the link layer with application layer controls. It consists of the following contributions: (1) an appropriate model to estimate the varying fading channel is proposed; (2) a hybrid delay-constrained ARQ (automatic repeat request) and UEP (unequal error protection) mechanism that dynamically adapt to the time-varying channel is presented to meet the QoS requirements for different applications; (3) a new resource allocation scheme that considers varying media characteristics is described to be adapted to changing bit error rate (BER) conditions. Simulation results demonstrate the effectiveness of our proposed scheme
Keywords :
adaptive systems; automatic repeat request; broadband networks; code division multiple access; delays; error statistics; fading channels; land mobile radio; multimedia communication; multiuser channels; quality of service; radio networks; time-varying channels; BER; W-CDMA channels; Web traffic; adaptive QoS; application layer controls; audio traffic; automatic repeat request; bit error rate; email; hybrid delay-constrained ARQ; link layer; multimedia transmission; multiple media; quality of service; rate adaptation; resource allocation; simulation results; third generation wireless networks; time-varying channel; unequal error protection; varying fading channel estimation; video traffic; wideband code division multiple access; Automatic control; Automatic repeat request; Bit error rate; Delay estimation; Electronic mail; Multiaccess communication; Quality of service; Resource management; Traffic control; Wideband;
Conference_Titel :
Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6596-8
DOI :
10.1109/WCNC.2000.904623
