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Radial Sub-band Allocation with Downlink Interference Mitigation in Macro–Femto Environment

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Abstract

Femtocell deployment is an important strategy when it comes to improvement of QoS metrics in areas of poor cell coverage like indoors in an LTE environment. This, however, is accompanied by bottlenecks in resource allocation and trade-offs in accuracy for interference management in the heterogeneous two-tier network of macro and femtocell environment. To that end, we propose two schemes using radial division of cells that allocate sub-bands to both femtocell users and macrocell users which in turn, mitigates co-channel interference. Simulation results show that our proposed schemes, commonly named as radial sub-band allocation (RSA-1 and RSA-2) improve performance as measured by signal to interference and noise ratio, sum throughput, outage probability, and channel reuse efficiency while maintaining a balance in computational complexity with existing schemes like F-ALOHA. Further experimentation revealed that the proposed version also works exceedingly well in ultra-dense environments.

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  1. National Institute of Technology Durgapur, Durgapur, India

    Soumi Basu, Anish Pradhan & Sanjay Dhar Roy

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  1. Soumi Basu
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  2. Anish Pradhan
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  3. Sanjay Dhar Roy
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Correspondence to Anish Pradhan.

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Basu, S., Pradhan, A. & Dhar Roy, S. Radial Sub-band Allocation with Downlink Interference Mitigation in Macro–Femto Environment. Wireless Pers Commun 106, 955–969 (2019). https://doi.org/10.1007/s11277-019-06198-0

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