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Policies for the reconfiguration of cognitive wireless infrastructures to 3G Radio Access Technologies


The ceaseless evolution of wireless communications is reflected nowadays on the introduction of Beyond-3G (B3G) systems, characterized by the coexistence and cooperation of various Radio Access Technologies (RATs), over a common infrastructure. Major facilitator of this convergence is the advent of cognitive networks, which deploy elements (base stations and mobile terminals) that are able to proactively adapt to environmental stimuli, so that to optimize their performance. Part of the adaptation action takes place in cognitive base stations that own several reconfigurable transceivers, which are controlled by appropriate management functionality and may dynamically change their operating parameters. Each reconfiguration set includes a specific RAT, carrier frequency, as well as demand volume to be allocated per transceiver. Accordingly, proper evaluation of the various candidate reconfiguration sets appears to be of high significance. To this effect, in this paper we consider a cognitive network segment with transceivers operating at 3G RAT/carrier and we solve the DAMC problem (Demand Allocation into Multiple Carriers problem), which aims at evaluating and selecting the optimum policy to allocate the demand into the available 3G carrier frequencies. Optimality is expressed in terms of minimizing the total transmitted/received power per base station, thus deciding for the reconfigurations with the least impact on network interference. Indicative simulation scenarios and results are also presented for the validation and verification of the proposed functionality.

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This work has been performed in the framework of the EU funded projects E2R and E2R II. The authors would like to acknowledge the contributions of their colleagues from E2R and E2R II consortia.

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Correspondence to Kostas A. Tsagkaris.

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Tsagkaris, K.A., Dimitrakopoulos, G. & Demestichas, P. Policies for the reconfiguration of cognitive wireless infrastructures to 3G Radio Access Technologies. Wireless Netw 15, 391–405 (2009).

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  • B3G communications
  • Cognitive networks
  • Demand allocation policies
  • Multiple carriers
  • Power-based optimization
  • Radio Access Technologies (RATs)
  • Reconfigurations