Power-Controlled Rate and Coverage Adaptation for WCDMA cellular networks

To efficiently utilize the limited spectrum of interference limited Wide-band Code-Division Multiple-Access (WCDMA) cellular networks, transmission rates allocation and base station association for mobile users need to be optimal. In this paper, Power-Controlled Rate and Coverage Adaptation (PCRCA) module is proposed to balance network load, maximize number of users admitted to the system while assuring their Quality of Service (QoS) requirements. It is a cooperative scheme which allows nearby sectors of two adjacent cells to dynamically change their coverage to meet the optimal transmission rates allocation for their mobile users. A heuristic algorithm is implemented to solve an optimization model of the proposed scheme. The obtained power and capacity gains as well as outage probability of the proposed algorithm is compared to the obtained results of a system with only power-controlled rate adaptation mechanism.

[1]  Zaher Dawy,et al.  Fixed Relaying with Advanced Antennas for CDMA Cellular Networks. , 2006 .

[2]  Abd-Elhamid M. Taha,et al.  Directional cell breathing: a module for congestion control and load balancing in WCDMA networks , 2006, IWCMC '06.

[3]  Victor C. M. Leung,et al.  A novel dynamic cell configuration scheme in next-generation situation-aware CDMA networks , 2005, 2005 IEEE 61st Vehicular Technology Conference.

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

[5]  Satish K. Tripathi,et al.  Understanding the effects of hotspots in wireless cellular networks , 2004, IEEE INFOCOM 2004.

[6]  Jens Zander,et al.  Performance of optimum transmitter power control in cellular radio systems , 1992 .

[7]  Seong-Lyun Kim,et al.  Combined power control and transmission rate selection in cellular networks , 1999, Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).

[8]  R.W. Nettleton,et al.  Power control for a spread spectrum cellular mobile radio system , 1983, 33rd IEEE Vehicular Technology Conference.

[9]  Sang Wu Kim,et al.  Combined rate and power adaptation in DS/CDMA communications over Nakagami fading channels , 2000, IEEE Trans. Commun..

[10]  Yu-Chee Tseng,et al.  Interference analysis and resource allocation for TDD-CDMA systems to support asymmetric services by using directional antennas , 2005, IEEE Trans. Veh. Technol..

[11]  Roy D. Yates,et al.  A Framework for Uplink Power Control in Cellular Radio Systems , 1995, IEEE J. Sel. Areas Commun..

[12]  David J. Goodman,et al.  Distributed power control in cellular radio systems , 1994, IEEE Trans. Commun..

[13]  Oriol Sallent,et al.  Network-controlled cell-breathing for capacity improvement in heterogeneous CDMA/TDMA scenarios , 2006, IEEE Wireless Communications and Networking Conference, 2006. WCNC 2006..

[14]  Andrew J. Viterbi,et al.  On the capacity of a cellular CDMA system , 1991 .

[15]  Zaher Dawy,et al.  WLC26-4: Fixed Relaying with Advanced Antennas for CDMA Cellular Networks , 2006, IEEE Globecom 2006.

[16]  Laurie G. Cuthbert,et al.  Reducing Congestion over Hotspot Clusters in WCDMA Networks , 2007, 2007 IEEE Wireless Communications and Networking Conference.

[17]  Gerard J. Foschini,et al.  A simple distributed autonomous power control algorithm and its convergence , 1993 .