A Cost Function Model for CRRM over Heterogeneous Wireless Networks

Authors:
António Serrador;Luís M. Correia
Affiliations:
Instituto Superior Técnico/Instituto de Telecomunicações, Technical University of Lisbon, Lisbon, Portugal;Instituto Superior Técnico/Instituto de Telecomunicações, Technical University of Lisbon, Lisbon, Portugal
Venue:
Wireless Personal Communications: An International Journal
Year:
2011

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Abstract

Heterogeneous cellular networks performance is usually analysed by taking several Key Performance Indicators (KPIs) into account, their proper balance being required in order to guarantee a desired Quality of Service (QoS). An approach to simplify and integrate a set of KPIs into a single one is presented, by using the proposed Cost Function model that includes these KPIs, providing a single evaluation parameter as output, and reflecting network conditions and Common Radio Resource Management (CRRM) strategies performance. This paper proposes a Cost Function that enables the implementation of different CRRM algorithms and policies, by manipulating KPIs according to user's or operator's perspectives, allowing for a better QoS. Results show that different policies can in fact be established, with a different impact on the network, e.g., with median values ranging by a factor higher than two.