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In this paper, the interplay between cooperative device‐to‐device (D2D) communications and green cellular communications in the long term evolution (LTE) and LTE‐advanced (LTE‐A) cellular systems is investigated. An efficient approach for grouping mobile terminals (MTs) into cooperative clusters is described. In each cluster, MTs cooperate via D2D communications to share content of common interest...
Energy aware coordination between mobile devices and the cellular network infrastructure is studied. The objective is to rely on both device-to-device (D2D) communications and any small cell base stations (BSs) that can be powered by renewable energy in order to offload traffic from the mains powered macrocell BSs (MBSs) and small cell BSs (SCBSs) in a heterogeneous network (HetNet). This would allow...
This paper describes a method for BS on/off switching in LTE-Advanced (LTE-A). The proposed method uses information exchanged between base stations (BSs) on the X2 interface in order to determine the BSs that should be switched on or off. It does not require centralized intelligence controlling the on/off switching in the network. Instead, it relies on always active coverage BSs that control the on/off...
In this paper, the optimization of base station (BS) deployment is investigated. After determining an approximate number of required BSs to cover an area of interest, the positions of these BSs are determined using the simulated annealing (SA) algorithm. Deployment using SA is compared to a benchmark approach consisting of a uniform deployment of the BSs over the area of interest. Scenarios with uniform...
In this paper, a game theoretical framework for energy efficient operation of heterogeneous LTE cellular networks is proposed. Within this framework, two game theoretic concepts are studied and analyzed. The first approach is a coalition-based method that assumes a group of base stations (BSs) in a network form a coalition. The second approach is based on the Nash bargaining solution and considers...
Performance enhancements of cellular networks for passengers in high speed railway systems are investigated. Relays placed on top of each train car are proposed. These relays communicate with the cellular base station (BS) over Long Term Evolution (LTE) long range links and with the mobile terminals (MTs) inside the train cars using IEEE 802.11a short range links. Scenarios with unicasting and multicasting...
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