Network-controlled cell-breathing for capacity improvement in heterogeneous CDMA/TDMA scenarios

This paper proposes a new common radio resource management (CRRM) methodology which allows increasing the capacity of heterogeneous CDMA/TDMA. This is achieved by controlling the effective cell radius of the CDMA-based system (i.e. a network-controlled cell-breathing) through appropriate initial RAT selection and vertical handover strategies, so that the interference level in the CDMA-based RAT is reduced while at the same time the target coverage area is assured by means of the cooperation of the FDMA/TDMA based RATs. The proposed approach is evaluated by means of system level simulations in a detailed scenario including UTRAN and GERAN as examples of CDMA and FDMA/TDMA-based access technologies. Results reveal that throughput improvements up to 24% can be achieved with respect to other CRRM strategies based on load balancing principles

[1]  A. Mitschele-Thiel,et al.  Force-based load balancing in co-located UMTS/GSM networks , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[2]  Susan J. Lincke,et al.  Vertical handover policies for common radio resource management , 2005, Int. J. Commun. Syst..

[3]  P. Hakalin,et al.  Adaptive load balancing between multiple cell layers , 2002, Proceedings IEEE 56th Vehicular Technology Conference.

[4]  Oriol Sallent,et al.  Radio Resource Management Strategies in UMTS , 2005 .

[5]  Oriol Sallent,et al.  On the Suitability of Load Balancing Principles in Heterogeneous Wireless Access Networks , 2005 .

[6]  Oriol Sallent,et al.  Radio Resource Management Strategies in UMTS: Perez-Romero/Radio Resource Management Strategies in UMTS , 2005 .

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

[8]  Joan J. Olmos,et al.  Transport block error rates for UTRA-FDD downlink with transmission diversity and turbo coding , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[9]  Oriol Sallent,et al.  Common radio resource management: functional models and implementation requirements , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.

[10]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.