DocumentCode :
3079909
Title :
Cross Layer Resource Allocation Design for Uplink Video OFDMA Wireless Systems
Author :
Wang, Dawei ; Cosman, Pamela C. ; Milstein, Laurence B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, San Diego, La Jolla, CA, USA
fYear :
2011
fDate :
5-9 Dec. 2011
Firstpage :
1
Lastpage :
6
Abstract :
We study an uplink video communication system with multiple users in a centralized wireless cell. The multiple access scheme is Orthogonal Frequency Division Multiple Access (OFDMA). Both physical layer channel state information (CSI) and application layer rate distortion (RD) information of video streams are collected by the base station. With the goal of minimizing the average video distortion across all the users in the system, we design an iterative resource allocation algorithm for subcarrier assignment and power allocation. Based on the physical layer resource allocation decision, the user will adapt the application layer video source coding rate. To show the advantage of this cross layer algorithm, numerical results are compared with two baseline resource allocation algorithms using only physical layer information or only application layer information. Bit-level simulation results are presented which take into account the imperfection of the video coding rate control, as well as channel errors.
Keywords :
OFDM modulation; cellular radio; frequency division multiple access; iterative methods; resource allocation; video coding; CSI; RD; bit-level simulation; cross layer resource allocation design; iterative resource allocation algorithm; layer rate distortion information; orthogonal frequency division multiple access; physical layer channel state information; power allocation; subcarrier assignment; uplink video OFDMA wireless systems; video coding rate control; wireless cell; Algorithm design and analysis; Base stations; Cross layer design; Optimization; Physical layer; Resource management; Streaming media;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
ISSN :
1930-529X
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
Type :
conf
DOI :
10.1109/GLOCOM.2011.6134147
Filename :
6134147
Link To Document :
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