NDLI: Call admission and code allocation strategies for WCDMA systems with multirate traffic

Content Provider	IEEE Xplore Digital Library
Author	Cruz-Perez, F.A. Vazquez-Avila, J.L. Seguin-Jimenez, A. Ortigoza-Guerrero, L.
Copyright Year	1983
Abstract	In this paper, call admission and code allocation schemes are proposed to provide service differentiation in the forward link of wideband code-division multiple-access (WCDMA) systems. In particular, this paper proposes multiple leaf code reservation (MLCR) schemes, where different numbers of orthogonal variable spreading factor (OVSF) leaf codes (i.e., codes of the lowest layer of the OVSF code tree) are reserved to differentiate users with different bandwidth requirements. Leaf codes are only reserved for as long as the call admission process lasts. Once the decision of whether a new request is admitted or not has been made, a Code Dereservation procedure is carried out to increase flexibility in the code assignment phase. The performance of these MLCR strategies with/without code reassignments is then evaluated. Analysis shows that MLCR schemes are also useful in improving fair access among different traffic classes. In addition, perfect fair access among requests with different data rates can be achieved when code reassignments are jointly employed with the proposed OVSF-code reservation schemes.
Starting Page	26
Ending Page	35
Page Count	10
File Size	483713
File Format	PDF
ISSN	07338716
Volume Number	24
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Traffic control Wideband Communication system control Resource management Transceivers Cities and towns Bandwidth Communication system traffic control Multimedia communication wideband code-division multiple access (WCDMA) Admission control code-division multiaccess code reassignment multimedia communication orthogonal variable spreading factor (OVSF) code allocation OVSF code reservation queueing analysis resource management
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Electrical and Electronic Engineering

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