Qatar University Institutional Repository: Recent submissions
Now showing items 141-160 of 28749
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Cooperative ad hoc networks for energy and delay efficient content distribution with fast channel variations
( John Wiley and Sons Ltd , 2012 , Article)Cooperative ad hoc networks for the efficient distribution of content of common interest are studied in the case of fast channel variations. Mobiles are grouped into cooperative clusters for the purpose of receiving the ... -
On the extension of traditional resource allocation algorithms in LTE-A to joint UL-DL scheduling with FDD carrier aggregation
( IEEE , 2014 , Conference Paper)Through and spectral efficiency maximization are two of the most challenging issues to be addressed by current and future cellular networks. To achieve these goals however, radio resources need to be utilized in a coordinated ... -
Wireless sensor network for real-time air pollution monitoring
( IEEE , 2013 , Conference Paper)This paper presents an ambient real-time air quality monitoring system. The system consists of several distributed monitoring stations that communicate wirelessly with a backend server using machine-to-machine communication. ... -
Enhanced connectivity in railroad networks using LTE relays with directive antennas
( IEEE , 2013 , Conference Paper)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 mobile terminals (MTs) ... -
Energy-efficient two-hop LTE resource allocation in high speed trains with moving relays
( IEEE , 2014 , Conference Paper)High-speed railway system equipped with moving relay stations placed on the middle of the ceiling of each train wagon is investigated. The users inside the train are served in two hops via the 3GPP Long Term Evolution (LTE) ... -
On the impact of D2D traffic offloading on energy efficiency in green LTE-A HetNets
( John Wiley and Sons Ltd , 2015 , Article)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 ... -
A practical approach for base station on/off switching in green LTE-A HetNets
( IEEE , 2014 , Conference Paper)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 ... -
On using relays with carrier aggregation for planning 5G networks supporting M2M traffic
( IEEE , 2014 , Conference Paper)In this paper, the joint use of carrier aggregation (CA) and relay stations (RSs) to support machine-to-machine (M2M) traffic in 5G networks is investigated. The focus of the paper is mainly on fixed M2M devices, periodically ... -
Achieving energy efficiency in LTE with joint D2D communications and green networking techniques
( IEEE , 2013 , Conference Paper)In this paper, the joint operation of cooperative device-to-device (D2D) communications and green cellular communications is investigated. An efficient approach for grouping mobile terminals (MTs) into cooperative clusters ... -
Physically separated uplink and downlink transmissions in LTE HetNets based on CoMP concepts
( Institution of Engineering and Technology , 2014 , Conference Paper)In this paper, we present a novel transmission and reception scheme in LTE heterogeneous networks (HetNets) that exploits the concept of Coordinated Multipoint (CoMP). In the proposed scheme, the uplink (UL) and downlink ... -
Performance of green LTE networks powered by the smart grid with time varying user density
( IEEE , 2013 , Conference Paper)In this study, we implement a green heuristic algorithm involving the base station sleeping strategy that aims to ensure energy saving for the radio access network of the 4GLTE (Fourth Generation Long Term Evolution) mobile ... -
SVC video streaming over cooperative LTE/802.11p vehicle-to-infrastructure communications
( IEEE , 2013 , Conference Paper)Collaborative techniques for real-time video streaming of scalable video coded (SVC) videos over vehicle to infrastructure (V2I) communications are investigated. In the studied methods, roadside units (RSUs) communicate ... -
Exploiting multiple wireless interfaces in smartphones for traffic offloading
( IEEE , 2013 , Conference Paper)Smartphones are evolving at a fast rate in terms of their computational, storage, and communications capabilities. A high-end smartphone is equipped with multiple wireless interfaces with varying bit rates, energy consumption ... -
A game theoretic framework for energy efficient deployment and operation of heterogeneous LTE networks
( IEEE , 2013 , Conference Paper)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 ... -
Interference mitigation in femtocell networks with joint channel sensing and resource allocation
( IEEE , 2015 , Conference Paper)Joint channel sensing and resource allocation in femtocell networks is investigated. An approach consisting of using jointly a sensing module in addition to a normal femto module performing resource allocation simultaneously ... -
Heterogeneous LTE/802.11a mobile relays for data rate enhancement and energy-efficiency in high speed trains
( IEEE , 2012 , Conference Paper)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) ... -
Optimized green operation of LTE networks in the presence of multiple electricity providers
( IEEE , 2012 , Conference Paper)Energy efficiency aspects in cellular networks can significantly contribute to the reduction of greenhouse gas emissions and help to save the environment. The base station (BS) sleeping strategy has become a well-known ... -
Green networking in cellular hetnets: A unified radio resource management framework with base station ON/OFF switching
( IEEE , 2017 , Conference Paper)In this paper, the problem of energy efficiency in cellular heterogeneous networks (HetNets) is investigated using radio resource and power management combined with the base station (BS) ON/OFF switching. The objective is ... -
Transmit Power Minimization and Base Station Planning for High-Speed Trains with Multiple Moving Relays in OFDMA Systems
( IEEE , 2017 , Conference Paper)A high-speed railway system equipped with moving relay stations placed on the middle of the ceiling of each train wagon is investigated. The users inside the train are served in two hops via orthogonal frequency-division ... -
Multi-operator collaboration for green cellular networks under roaming price consideration
( IEEE , 2014 , Conference Paper)This paper investigates the collaboration between multiple mobile operators to optimize the energy efficiency of cellular networks. Our framework studies the case of LTE-Advanced networks deployed in the same area and ...