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Effect of mobile terminal heterogeneity on call blocking/dropping probability in cooperative heterogeneous cellular networks

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Abstract

It is envisaged that next generation wireless networks (NGWN) will be heterogeneous, consisting of multiple radio access technologies (RATs) coexisting in the same geographical area. In these heterogeneous wireless networks, mobile terminals of different capabilities (heterogeneous terminals) will be used by subscribers to access network services. We investigate the effect of using heterogeneous mobile terminals (e.g. single-mode, dual-mode, triple-mode, etc.) on call blocking and call dropping probabilities in cooperative heterogeneous wireless networks. We develop analytical models for heterogeneous mobile terminals and joint radio resource management in heterogeneous wireless networks. Using a two-class three-RAT heterogeneous wireless network as an example, the effect of using heterogeneous terminals in the network is evaluated. Results show the overall call blocking/dropping probability experienced by subscribers in heterogeneous wireless networks depends on the capabilities of mobile terminals used by the subscribers. In the worst case scenario, when all subscribers use single-mode mobile terminals, each subscriber is confined to a single RAT and consequently, joint radio resource management in heterogeneous wireless network has no improvement on new call blocking and handoff call dropping probabilities. However, in the best case scenario, when all subscribers use three-mode terminals, new class-1 call blocking probability decreases from 0.37 (for 100% single-mode terminals) to 0.05, at the arrival rate of 6 calls per minute. New class-2 call blocking probability also decreases from 0.8 to 0.52. Similarly, handoff class-1 call dropping probability decreases from 0.14 to 0.003, and handoff class-2 call dropping probability decreases from 0.44 to 0.09.

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Authors and Affiliations

  1. Department of Electrical Engineering, University of Cape Town, Rondebosch, South Africa

    Olabisi E. Falowo & H. Anthony Chan

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  1. Olabisi E. Falowo
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  2. H. Anthony Chan
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Correspondence to Olabisi E. Falowo.

Additional information

This work is supported in part by Telkom, Nokia Siemens Networks, TeleSciences, and National Research Foundation, South Africa, under the Broadband Center of Excellence program.

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Falowo, O.E., Chan, H.A. Effect of mobile terminal heterogeneity on call blocking/dropping probability in cooperative heterogeneous cellular networks. Telecommun Syst 47, 337–349 (2011). https://doi.org/10.1007/s11235-010-9322-2

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