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With enormous growth in the telecommunication industry, energy efficiency has become a critical issue. Base stations and the core network account for a large amount of energy consumption today. Traditional energy saving techniques switch some base stations off completely during light loads to save energy. This creates problems for the backhaul network and(More)
One of the emerging networking standards that gap between the physical world and the cyber one is the Internet of Things. In the Internet of Things, smart objects communicate with each other, data are gathered and certain requests of users are satisfied by different queried data. The development of energy efficient schemes for the IoT is a challenging issue(More)
In this paper, we investigate the problem of power optimization at base stations in 4G networks based on the available instantaneous channel state information. We focus on minimizing the power consumed at the base station end, whereas much of the power optimization-related work in the literature today is targeted at the mobile end. Further, a common feature(More)
Many wireless network standards include quality-of-service (QoS) features at the MAC layer. These features provide nodes transmitting high priority delay sensitive traffic such as voice and video preferential access to the channel over nodes carrying low priority delay tolerant traffic such as file transfer and email. However, such schemes are unfair to low(More)
Given the significant energy consumption in operating base stations (BSs), improving their energy efficiency is an important problem in cellular networks. To this end, this paper proposes a novel framework, called DCR (dynamic cell reconfiguration) that dynamically adjust the set of active BSs and user association according to user traffic demand for energy(More)
Indoor navigation for visually impaired is a highly challenging area due to the nature of limitations such as absence of GPS, inaccuracies with distance estimation with available technologies such as Bluetooth, Wi-Fi, etc. and particularly with mapping places visited for the first time or places that have been rebuilt to change from original layout. This(More)
As the Internet grows larger, measuring and characterizing its dynamics becomes essential for purposes ranging from the optimization of future network equipment to modeling the effects of new protocols on the existing traffic mix. One important aspect of Internet connections is bandwidth utilization with data sent using the TCP protocol. In this paper, we(More)
To prolong the lifetime of battery powered wireless devices, standard protocols for WLANs have the provision for such devices to transition to a "sleep" state periodically. Being in the "sleep" state entails minimal power consumption by a wireless device but it also increases the average packet delay that the device encounters. This paper proposes a simple,(More)