An OVSF code assignment scheme utilizing multiple rake combiners for W-CDMA

Li-Hsing Yen; Ming Chun Tsou

doi:10.1109/ICC.2003.1204063

An OVSF code assignment scheme utilizing multiple rake combiners for W-CDMA

Li-Hsing Yen^*, Ming Chun Tsou

^*Corresponding author for this work

Department of Computer Science

Research output: Contribution to journal › Conference article › peer-review

19 Scopus citations

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 advantages 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.

Original language	English
Pages (from-to)	3312-3316
Number of pages	5
Journal	IEEE International Conference on Communications
Volume	5
DOIs	https://doi.org/10.1109/ICC.2003.1204063
State	Published - 2003
Event	2003 International Conference on Communications (ICC 2003) - Anchorage, AK, United States Duration: 11 May 2003 → 15 May 2003

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title = "An OVSF code assignment scheme utilizing multiple rake combiners for W-CDMA",

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 advantages 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.",

author = "Li-Hsing Yen and Tsou, {Ming Chun}",

year = "2003",

doi = "10.1109/ICC.2003.1204063",

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T1 - An OVSF code assignment scheme utilizing multiple rake combiners for W-CDMA

AU - Yen, Li-Hsing

AU - Tsou, Ming Chun

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N2 - 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 advantages 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.

AB - 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 advantages 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.

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JO - IEEE International Conference on Communications

JF - IEEE International Conference on Communications

T2 - 2003 International Conference on Communications (ICC 2003)

Y2 - 11 May 2003 through 15 May 2003

ER -

An OVSF code assignment scheme utilizing multiple rake combiners for W-CDMA

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