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The widely studied network energy efficiency (EE)-optimal problems (NEPs) emphasize optimality of system EE without taking fairness into account. In this paper, we focus on the max–min EE-optimal problem (MEP) by means of power allocation in interference-limited wireless networks. The MEP offers fairness assurance for users in terms of EE by maximizing the EE of the worst-case user. We show that the...
In this paper, by jointly considering antenna selection and power allocation, we address the energy efficiency (EE) maximization problem with delay performance taken into account in downlink distributed antenna systems (DAS). To characterise system EE, we first define a revenue-cost (RC) function as the weighted difference between sum transmit rate and total energy consumption. We then formulate the...
The IEEE 802.16 standards are based on Orthogonal Frequency Division Multiplexing (OFDM) and multi-user OFDM (also known as OFDMA) for their desirable characteristics and potentials. Although well established, these standards only provide a framework of necessary mechanisms for deployable systems. Majority of the resource allocation issues are left unspecified. The conventional one-dimension scheduling...
In this paper, a resource management approach based on IEEE1900.4 architecture for heterogeneous wireless network is given. The rest of the paper is organized as follows. In Section II, the radio resource management approach consisting inter-network resource allocation, RAN resource reservation and access network selection in heterogeneous network is present.
Cognitive radio is an emerging technique to improve the spectrum utilization in future wireless communication systems. In this paper, we study the power allocation strategy of cognitive orthogonal frequency division multiplexing (OFDM) system, where both primary user and cognitive user have multiple channels to transmit. The mathematical optimization problem is first formulated, based on the interference...
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