NDLI: An OVSF Code assignment scheme utilizing multiple Rake combiners for W-CDMA

Content Provider	IEEE Xplore Digital Library
Author	Li-Hsing Yen Ming-Chun Tsou
Copyright Year	2003
Description	Author affiliation: Dept. of Comput. Sci. & Inf. Eng., Chung Hua Univ., Hsinchu, Taiwan (Li-Hsing Yen; Ming-Chun Tsou)
Abstract	Orthogonal variable spreading factor (OVSF) codes have been proposed as the channelization codes used in the wideband CDMA access technology of IMT-2000. OVSF codes have the advantage of supporting variable bit rate services, which is important to emerging multimedia applications. The objective of OVSF code assignment algorithm is to minimize the probability of code request denial due to inappropriate resource allocation. In this paper, we propose an efficient OVSF code assignment scheme that utilizes multiple Rake combiners in user equipments. Our approach finds in constant time all feasible codewords for any particular request, trying to minimize both rate wastage and code fragments. The simulation result shows that our scheme outperforms previous work in the probability of request denial. The code management overhead is also minimal in our scheme.
Starting Page	3312
Ending Page	3316
File Size	367707
Page Count	5
File Format	PDF
ISBN	0780378024
DOI	10.1109/ICC.2003.1204063
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Bit rate 3G mobile communication Computer science Wideband Resource management Quality of service Multimedia systems Frequency conversion Binary trees
Content Type	Text
Resource Type	Article

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