Abstract
AbstractIn this chapter, we investigate the energy-efficient resource allocation in heterogeneous orthogonal frequency division multiple access (OFDMA) networks. Section 7.1 introduces the motivation of developing energy-efficient resource allocation for heterogeneous OFDMA networks. Section 7.2 presents the system model. Section 7.3 formulates the energy-efficient resource allocation problem as a mixed-integer nonlinear fractional programing (MINLFP) problem and transforms it into an equivalent concave mixed-integer nonlinear programing (MINLP) problem in a parametric subtractive form. Section 7.4 derives the global optimal solution. Section 7.5 decomposes the resource allocation into two sub-problems, namely resource block (RB) allocation and transmit power control (TPC), and develops the sub-optimal scheme. Section 7.6 presents the simulation results, and Sect. 7.7 concludes this chapter.
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