Optimal Traffic Sharing in GERAN

Authors:
Salvador Luna-Ramírez;Matías Toril;Mariano Fernández---Navarro;Volker Wille
Affiliations:
Communications Engineering Department, University of Málaga, Málaga, Spain;Communications Engineering Department, University of Málaga, Málaga, Spain;Communications Engineering Department, University of Málaga, Málaga, Spain;Performance Services, Nokia Siemens Networks, Huntingdon, UK
Venue:
Wireless Personal Communications: An International Journal
Year:
2011

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Abstract

In a mobile communications network, the uneven spatial distribution of traffic demand can be dealt with by redefining cell service areas. When resizing cells, network operators often aim at equalizing call blocking rates throughout the network in the hope that this will maximize the total carried traffic in the network. In this paper, an analytical teletraffic model for the traffic sharing problem in GSM-EDGE radio access network (GERAN) is presented. From this model, a closed-form expression is derived for the optimal traffic sharing criterion between cells. Using this expression, it can be shown that balancing call blocking rate between adjacent cells is not the optimal strategy. Results show that using the optimal traffic sharing criterion instead of balancing blocking rates across the network can increase network capacity, even under restrictions in the cell resizing process.