Soft capacity modeling for WCDMA radio resource management

Bing, Cao; Dahlberg, Teresa A.

doi:10.1590/S0104-65002003000100001

Abstract

This work addresses wireless capacity models and capacity consumption models for 3G WCDMA system analysis. Uplink and downlink capacities are viewed as multiple heterogeneous circuit-switched and packet-switched pools of various bit rate channels, wherein traffic channels and control channels contend for the same capacity within a cell. An individual user's consumption of capacity is formulated as a function of the user's traffic class, activity factor and negotiated QoS. Simulation based analysis, of resource management algorithms that employ admission control and channel rate- and type-switching, are undertaken to compare results obtained using the proposed capacity and capacity consumption models to that obtained using existing homogeneous models. The primary results demonstrate that differentiating between channel modes, giving consideration to control channel utilization, and giving consideration to user's service type can each significantly impact the results and conclusions drawn from resource management protocol analysis.

Capacity Model; 3G; WCDMA; Radio Resource Management

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ARTICLES

Soft capacity modeling for WCDMA radio resource management

Bing Cao^{I, III}; Teresa A. Dahlberg^{II, III}

^IStudent Member, IEEE

^IIMember, IEEE

^IIIComputer Science Department, University of North Carolina at Charlotte, Charlotte, NC 28223, USA {bcao,tdahlberg}@uncc.edu

ABSTRACT

This work addresses wireless capacity models and capacity consumption models for 3G WCDMA system analysis. Uplink and downlink capacities are viewed as multiple heterogeneous circuit-switched and packet-switched pools of various bit rate channels, wherein traffic channels and control channels contend for the same capacity within a cell. An individual user's consumption of capacity is formulated as a function of the user's traffic class, activity factor and negotiated QoS. Simulation based analysis, of resource management algorithms that employ admission control and channel rate- and type-switching, are undertaken to compare results obtained using the proposed capacity and capacity consumption models to that obtained using existing homogeneous models. The primary results demonstrate that differentiating between channel modes, giving consideration to control channel utilization, and giving consideration to user's service type can each significantly impact the results and conclusions drawn from resource management protocol analysis.

Keywords: Capacity Model, 3G, WCDMA, Radio Resource Management.

T. A. Dahlberg is a professor in the Computer Science Department, University of North Carolina at Charlotte, Charlotte, NC 28223, USA (corresponding author, e-mail: tdahlber@uncc.edu).

B.Cao is a doctoral student in the Computer Science Department, University of North Carolina at Charlotte, Charlotte, NC 28223, USA (e-mail: bcao@uncc.edu).

[1] Gilhousen K. J., Jacobs I.M., Padovani R., Viterbi A. J., Weaver I. A. and Wheatly C.E., "On the capacity of a cellular CDMA system", IEEE Transactions on Vehicular Technology, vol. 40, May 1991, pp 303-312.
[2] Viterbi A.M., and Viterbi A. J, "Erlang capacity of a power controlled CDMA system", IEEE Journal on Selected Areas in Communications, vol. 11, No. 6, Aug 1993, pp. 892-920.
[3] C. Comaniciu, N. Mandayam, D. Famolari and P. Agrawal, "Admission and Flow Control in Multimedia CDMA, in Proceedings of IEEE Multimedia Conference, New York, NY, July 2000.
[4] Homa H. and Toskala A.,WCDMA for UMTS: Radio Access For Third Generation Mobile Communications, Revised Edition, Wiley, 2001.
[5] Eitan Altman, "Capacity of Multi-service Cellular Networks with Transmission-Rate Control: A Queueing Analysis", MOBICOM'02, Atlanta, Georgia, USA, Sep 23-28,2002.
[6] Rui Luo, PingZhi Fan, "Capacity Evaluation of Packet-Switched CDMA System", IEEE Communication Letters, vol. 15, No 8, Aug, 2001.
[7] Yoshihiro Ishikawa, Narumi Umeda, "Capacity Design and Performance of Call Admission Control in Cellular CDMA Systems", IEEE Journal on selected areas in communications, vol. 15, No.8, Oct, 1997.
[8] K. Parsa, S.S. Ghssemzadeh, S. Kazeminejad, "Systems Engineering of Data Services in UMTS W-CDMA Systems", International Conference on Communications, Helsinki, Finland, June 2001.
[9] GBT wireless, CPCH Technical Overview, [Online], Available: http://www.getwireless.com/pages/tech/tech.html
[10] Ramjee Prasad, Tero Ojanpera, "An Overview of CDMA Evolution Towards WideBand CDMA", IEEE Communications Surveys, Fourth Quarter, 1998. vol. 1 No.1.
[11] 3 GPP, Radio Resource Management Strategies (Release 4), 3GPP TR25.992 V4.2.0, March 2002.
[12] 3GPP, QoS Concept and Architecture (Release 4), 3GPP TS23.107 V4.2.0, Oct 2001.
[13] 3GPP, Physical Channels and mapping of transport channels onto physical channels (Release 1999), 3GPP TS25.211V3.5.0,Dec2000.
[14] 3GPP, Physical Layer Procedures (FDD) (Release 1999), 3GPP TS25.214 V3.5.0, Dec 2000.
[15] 3GPP, Services provided by the Physical layer, 3GPP TS25.302 V3.5.0, June 2000.
[16] JavaSim, [Online], Available : http://www.javasim.org
[17] Universal Mobile Telecommunication System (UMTS), Selection procedures for the choice of radio transmission technologies of the UMTS (UMTS 30.03 version 3.2.0), TR 101 102 V3.2.0, April 1998.

Publication Dates

Publication in this collection
14 Sept 2004
Date of issue
Apr 2003

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] [1] Gilhousen K. J., Jacobs I.M., Padovani R., Viterbi A. J., Weaver I. A. and Wheatly C.E., "On the capacity of a cellular CDMA system", IEEE Transactions on Vehicular Technology, vol. 40, May 1991, pp 303-312.

[2] [2] Viterbi A.M., and Viterbi A. J, "Erlang capacity of a power controlled CDMA system", IEEE Journal on Selected Areas in Communications, vol. 11, No. 6, Aug 1993, pp. 892-920.

[3] [3] C. Comaniciu, N. Mandayam, D. Famolari and P. Agrawal, "Admission and Flow Control in Multimedia CDMA, in Proceedings of IEEE Multimedia Conference, New York, NY, July 2000.

[4] [4] Homa H. and Toskala A.,WCDMA for UMTS: Radio Access For Third Generation Mobile Communications, Revised Edition, Wiley, 2001.

[5] [5] Eitan Altman, "Capacity of Multi-service Cellular Networks with Transmission-Rate Control: A Queueing Analysis", MOBICOM'02, Atlanta, Georgia, USA, Sep 23-28,2002.

[6] [6] Rui Luo, PingZhi Fan, "Capacity Evaluation of Packet-Switched CDMA System", IEEE Communication Letters, vol. 15, No 8, Aug, 2001.

[7] [7] Yoshihiro Ishikawa, Narumi Umeda, "Capacity Design and Performance of Call Admission Control in Cellular CDMA Systems", IEEE Journal on selected areas in communications, vol. 15, No.8, Oct, 1997.

[8] [8] K. Parsa, S.S. Ghssemzadeh, S. Kazeminejad, "Systems Engineering of Data Services in UMTS W-CDMA Systems", International Conference on Communications, Helsinki, Finland, June 2001.

[9] [9] GBT wireless, CPCH Technical Overview, [Online], Available: http://www.getwireless.com/pages/tech/tech.html

[10] [10] Ramjee Prasad, Tero Ojanpera, "An Overview of CDMA Evolution Towards WideBand CDMA", IEEE Communications Surveys, Fourth Quarter, 1998. vol. 1 No.1.

[11] [11] 3 GPP, Radio Resource Management Strategies (Release 4), 3GPP TR25.992 V4.2.0, March 2002.

[12] [12] 3GPP, QoS Concept and Architecture (Release 4), 3GPP TS23.107 V4.2.0, Oct 2001.

[13] [13] 3GPP, Physical Channels and mapping of transport channels onto physical channels (Release 1999), 3GPP TS25.211V3.5.0,Dec2000.

[14] [14] 3GPP, Physical Layer Procedures (FDD) (Release 1999), 3GPP TS25.214 V3.5.0, Dec 2000.

[15] [15] 3GPP, Services provided by the Physical layer, 3GPP TS25.302 V3.5.0, June 2000.

[16] [16] JavaSim, [Online], Available : http://www.javasim.org

[17] [17] Universal Mobile Telecommunication System (UMTS), Selection procedures for the choice of radio transmission technologies of the UMTS (UMTS 30.03 version 3.2.0), TR 101 102 V3.2.0, April 1998.

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Soft capacity modeling for WCDMA radio resource management

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