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Routing plays an important role in the overall architecture of the Internet of Things. IETF has standardized the RPL routing protocol to provide the interoperability for low-power and lossy networks (LLNs). LLNs cover a wide scope of applications, such as building automation, industrial control, healthcare, and so on. LLNs applications require reliable and energy-efficient routing support. Point-to-point...
Considering a heterogeneous cellular network where macro base stations (MBSs) are powered by grid power and small base stations (SBSs) are powered by renewable energy. We investigate the grid energy minimization problem by optimizing both the MBS active probability (MAP) and the SBS transmit power (STP) under the constraints of user quality of service (QoS) and renewable energy. Using tools from stochastic...
We study the user association problem targeting on the throughput optimization for energy harvesting (EH) relay-assisted cellular networks where the base stations (BSs) are powered by grid power and the relay stations (RSs) are powered by renewable energy. Since the harvested energy of RS is stochastic and not always large enough, our challenge is how to match the user association with the energy...
In this paper, we investigate the energy efficiency maximization problem of analog network coding (ANC) based two-way relay (TWR) assisted cellular network under quality of service (QoS) constraints through transmit power optimization. Circuit power cannot be ignored since it influences energy efficiency greatly. However, the difficulty is that maximizing energy efficiency is shown to be non-convex...
In future cellular systems, some energy harvesting (EH) powered relaying nodes may be deployed to achieve energy saving and quality of service (QoS) improvement, while base stations still get energy from power grid to ensure basic coverage requirements. In this paper, we focus on maximizing the energy efficiency (EE) of the non-EH source with the help of the EH decode-and-forward (DF) relaying nodes...
The advent of cloud systems has spurred the emergence of an impressive assortment of Internet services. Recent pressures on enhancing the profitability by curtailing surging dollar costs on energy have posed challenges to, as well as placed a new emphasis on, designing energy-efficient request dispatching and resource management algorithms. What further adds to the design challenge is the highly diverse...
In this paper, we focus on the delay constrained scheduling problem for wireless link communication under the practical concerns, such as the practical power consumption of transmitter and energy used for channel estimation. In particular, we target to design an energy-efficient scheduling policy that minimizes the total energy expenditure while satisfying the deadline constraint based on knowledge...
In this paper, we study energy-efficient channel aggregation problem in cognitive radio networks, where a secondary user senses multiple channels simultaneously or sequentially in the sensing period and subsequently aggregate those channels sensed free. We aim at designing the optimal sensing time and power allocation to achieve the maximum energy efficiency, meanwhile considering the maximum transmit...
Data transmitted in large scale dense wireless sensor networks (WSN) is often highly spatial correlated, and filtering out the spatial redundancy has been proved to be effective in energy conserving. At the same time, according to the results of Min Dong, different MAC mechanisms should be applied to different SNR regimes. But no existing MAC schemes design exploiting spatial correlation take this...
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