Abstract
Femtocell is an efficient solution for mobile operators to expand indoor coverage and increase network capacity. In this paper, we study the downlink resource allocation problem of two-tier macrocell–femtocell networks. We first formulate the problem as a Mixed Integer Non-Linear Program (MINLP) which aims to maximize the capacity of clustered femtocell networks subject to hard delay constraints of flows with different priorities. Next, we build \((\rho (\theta ),\sigma (\theta ))\) arrival model for the traffics and apply Stochastic Network Calculus (SNC) to transforming the delay constraints into alternative minimum transmission rate requirements, then we propose a resource allocation algorithm called S-SAPCS to solve the MINLP. Simulation results show that the proposed algorithm has near-optimal performance. We also design a scheme based on deterministic network calculus to show that S-SAPCS is able to exploit the statistical multiplexing gain among multiple flows, which improves the throughput significantly.
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This work is supported by the National Natural Science Foundation of China (NSFC) under Grant No. 61370065, the National Science and Technology Pillar Program (2015BAK12B00), and the Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality (IDHT20130519).
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Chen, X., Si, Y. & Xiang, X. Delay-bounded resource allocation for femtocells exploiting the statistical multiplexing gain. J Supercomput 71, 3217–3236 (2015). https://doi.org/10.1007/s11227-015-1494-9
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DOI: https://doi.org/10.1007/s11227-015-1494-9