Radio resource management for CDMA systems with interference guard margin (IGM)

A call admission control (CAC) scheme and a resource reservation estimation (RRE) method suitable for the wide-band code division multiple access (W-CDMA) systems are proposed in this work. The proposed CAC scheme gives preferential treatment to high priority calls, such as handoff calls, by pre-reserving a certain amount of channel margin against the interference effect. It is called the interference guard margin (IGM) scheme. The amount of guard margin is determined by the measurement performed by the RRE module in base stations. Each RRE module dynamically adjusts the level of guard margin by referencing traffic conditions in neighboring cells based upon users' requests. A comprehensive service model is adopted to accommodate the scenario of multiple services supported in the W-CDMA system. The service model of consideration includes not only mobile terminal's service rate (source rate) but also different levels of priorities, mobility and rate adaptivity characteristics. Simulations are conducted with OPNET to study the performance of the proposed scheme in term of the objective function under different traffic conditions.

[1]  P.-O. Gaasvik,et al.  Different methods of giving priority to handoff traffic in a mobile telephone system with directed retry , 1991, [1991 Proceedings] 41st IEEE Vehicular Technology Conference.

[2]  Antti Toskala,et al.  Wcdma for Umts , 2002 .

[3]  C.-C. Jay Kuo,et al.  Differentiated QoS-aware priority handoff in cell-based multimedia wireless network , 2000, Electronic Imaging.

[4]  Harri Holma,et al.  Uplink admission control and soft capacity with MUD in CDMA , 1999, Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).

[5]  Stephen S. Rappaport,et al.  Traffic Model and Performance Analysis for Cellular Mobile Radio Telephone Systems with Prioritized and Nonprioritized Handoff Procedures - Version 2a , 2000 .

[6]  Mahmoud Naghshineh,et al.  Control and quality-of-service provisioning in high-speed microcellular networks , 1994, IEEE Personal Communications.

[7]  Irene Katzela.  Modeling and Simulating Communication Networks: A Hands-on Approach Using Opnet , 1998 .

[8]  Magnus Almgren,et al.  Radio Resource Management for Wireless Networks , 2001 .

[9]  Andrew J. Viterbi,et al.  Erlang Capacity of a Power Controlled CDMA System , 1993, IEEE J. Sel. Areas Commun..

[10]  Mischa Schwartz,et al.  Distributed call admission control in mobile/wireless networks , 1996, IEEE J. Sel. Areas Commun..

[11]  Zhao Liu,et al.  SIR-based call admission control for DS-CDMA cellular systems , 1994, IEEE J. Sel. Areas Commun..

[12]  Mahmoud Naghshineh,et al.  Distributed call admission control in mobile/wireless networks , 1995, Proceedings of 6th International Symposium on Personal, Indoor and Mobile Radio Communications.

[13]  Krishna M. Sivalingam,et al.  Dynamic resource allocation schemes during handoff for mobile multimedia wireless networks , 1999, IEEE J. Sel. Areas Commun..

[14]  J. Shapira.  Microcell engineering in CDMA cellular networks , 1994 .

[15]  Antti Toskala,et al.  WCDMA for UMTS: Radio Access for Third Generation Mobile Communications , 2000 .

[16]  Stephen S. Rappaport,et al.  Traffic model and performance analysis for cellular mobile radio telephone systems with prioritized and nonprioritized handoff procedures , 1986, IEEE Transactions on Vehicular Technology.

[17]  Jon M. Peha,et al.  Novel heuristics for call admission control in cellular systems , 1997, Proceedings of ICUPC 97 - 6th International Conference on Universal Personal Communications.