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Resource allocation with interference mitigation in femtocellular networks
( John Wiley & Sons, Ltd. , 2012 , Article)The introduction of femtocells enabled high data rates and better indoor coverage without the need for expanding or increasing the density of cellular networks deployment or upgrading the cellular network infrastructure. ... -
Energy-efficient Device-to-Device communications in LTE public safety networks
( IEEE , 2012 , Conference Paper)Device-to-Device communications are studied in the framework of LTE public safety networks. We propose a model where devices cooperate on the short range by forming coalitions for the purpose of energy efficiency. In each ... -
Air quality monitoring and prediction system using machine-to-machine platform
(2012 , Conference Paper)This paper presents an ambient air quality monitoring and prediction system. The system consists of several distributed monitoring stations that communicate wirelessly to a backend server using machine-to-machine communication ... -
Cooperative wireless sensor networks for green internet of things
( Association for Computing Machinery , 2012 , Conference Paper)Green internet of things are investigated by studying energy efficiency in wireless sensor networks. A cooperative multihop data transmission approach is presented and analyzed. Significant energy savings are achieved with ... -
Enhancing the QoS of real-time video streaming over LTE MBMS using D2D communications
( Association for Computing Machinery , 2012 , Conference Paper)Real-time video streaming over LTE multicast and broadcast multimedia services (MBMS) is investigated. The impact of device-to-device (D2D) communications in enhancing the quality of service (QoS) and reducing energy ... -
An energy-efficient M2M communication method for leakage detection in underground water pipes
( Association for Computing Machinery , 2012 , Conference Paper)An application of machine-to-machine (M2M) communication for leakage detection in underground water infrastructures is considered. A mobile sensor immersed in the water pipe is assumed to communicate with relay nodes on ... -
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 ... -
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 ... -
A genetic algorithm solution for the operation of green LTE networks with energy and environment considerations
( Springer , 2012 , Conference Paper)The Base Station (BS) sleeping strategy has become a well-known technique to achieve energy savings in cellular networks by switching off redundant BSs mainly for lightly loaded networks. Besides, the exploitation of ... -
A new MAC design in LTE for MIMO multiuser schemes
( IEEE , 2013 , Conference Paper)Long Term Evolution (LTE) supports closed-loop Multiple Input Multiple Output (MIMO) techniques, as a mechanism to improve system performance. An open topic since the appearance of MIMO is whether the feedback load, that ... -
Can dynamic pricing make femto users and service providers happy?
( IEEE Computer Society , 2013 , Conference Paper)Femtocell is a promising technology that will improve wireless resources efficiency through frequency spatial reuse however, its integration with the current cellular systems has been considered a fundamental challenge. ... -
Power consumption in spatial cognition
( wiley , 2013 , Article)Multiple input multiple output adds a new dimension to be exploited in cognitive radio by simultaneously serving several users. The spatial domain that is added through multiple input multiple output is another system ... -
Enhanced service delivery for cognitive systems within multiple antenna scenarios
( IEEE Computer Society , 2013 , Conference Paper)Multiple Input Multiple Output (MIMO) is a well established technology that when jointly considered with Cognitive Radio (CR) it will create interactions that need to be optimized. The capability to provide service to more ... -
A novel energy saving MIMO mechanism in LTE systems
( Institute of Electrical and Electronics Engineers Inc. , 2013 , Conference Paper)Long Term Evolution (LTE) supports closed-loop MIMO techniques to improve its performance, but in order to exploit multiuser MIMO channel capabilities, the design of an efficient MAC scheme that supports Multiuser MIMO is ... -
Energy optimization in multiuser quantized feedback systems
( Springer Nature , 2013 , Article)This article explores the effects of quantization of feedback information on energy consumption in multiuser wireless communication systems. In order to optimize the energy consumption of the system, the article concentrates ... -
Energy optimization in unsynchronized TDD systems for joint uplink downlink scheduling
( IEEE , 2013 , Conference Paper)Energy is an important resource in wireless communications systems that has to be optimized in order to guarantee low interference in the network as well as efficient use of the available resources. One of the prominent ... -
Energy efficient techniques for 802.11n multiuser MAC WLANs
( Institute of Electrical and Electronics Engineers Inc. , 2013 , Conference Paper)In this paper we evaluate the energy efficiency of MIMO technologies introduced in the emerging IEEE 802.11n standard for infrastructure based WLANs. The main focus is on exploiting multiuser capabilities of MIMO technologies, ... -
A modified joint uplink-downlink opportunistic scheduling for Quality of Service guarantees
( IEEE , 2013 , Conference Paper)Quality of Service (QoS) is a very important metric in wireless communication systems, where both Uplink (UL) and Downlink (DL) connections request strict QoS demands in terms of rate, delay, etc. for their proper operation. ... -
Enhancing the quality of experience of video streaming in LTE networks using distributed antenna systems
( IEEE , 2013 , Conference Paper)Video transmission over long term evolution (LTE) networks is studied. The use of distributed antenna systems (DAS) is proposed to enhance the video quality of experience (QoE). Real time video streaming over both the ...
