Social Welfare Maximization in Two-Tier Heterogeneous Cellular Networks

In this letter, an optimal bandwidth (BW) partitioning problem is studied for two-tier heterogeneous cellular networks (HCNs) with social welfare maximization (SWM) as an objective. Social welfare is represented as the sum of users' surplus and service provider's profit. For the SWM, the u...

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Bibliographic Details
Published inIEEE communications letters Vol. 23; no. 10; pp. 1826 - 1830
Main Authors Lohan, Poonam, Seo, Jun-Bae, De, Swades
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
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Summary:In this letter, an optimal bandwidth (BW) partitioning problem is studied for two-tier heterogeneous cellular networks (HCNs) with social welfare maximization (SWM) as an objective. Social welfare is represented as the sum of users' surplus and service provider's profit. For the SWM, the unique optimal BW-fraction is analytically obtained for the two tiers, where the spectrum is orthogonally partitioned between the tiers. By making the users indifferent to tiers for services, two different pricing schemes are presented. To ensure the feasibility of pricing schemes and the uniqueness of the optimal BW-fraction, the limits on operational cost factor are defined. It is shown that while satisfying the indifference principle, i.e., providing an equal surplus to the users from both tiers' services, the differential pricing scheme offers a better control over the users' surplus and service provider's profit than the single pricing scheme. Simulations validate the analytical results. The effects of different system parameters on the optimal BW-fraction and the associated load to the different tiers are also addressed.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2019.2927699