Browsing Qatar Mobility Innovations Center by Publication Date
Now showing items 1-20 of 314
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A Nash bargaining solution for energy-efficient content distribution over wireless networks with mobile-to-mobile cooperation
( IEEE , 2011 , Conference)A game theoretical formulation for energy minimization in mobile-to-mobile cooperative networks is provided. The problem is formulated as a Nash bargaining game, and the Nash bargaining solution is derived. Furthermore, a ... -
A channel-aware reservation protocol for cooperative content distribution over OFDMA networks
( IEEE , 2011 , Conference)In this paper, a channel aware resource reservation protocol for content distribution in an OFDMA wireless network with mobile-to-mobile cooperation is presented. The proposed approach consists of a reservation phase and ... -
An OFDMA communication protocol for wireless sensor networks used for leakage detection in underground water infrastructures
( IEEE , 2011 , Conference)In this paper, an application of wireless sensor networks for leakage detection in underground water pipes is considered. A mobile sensor immersed in the water pipe is assumed to communicate with relay nodes on the ground ... -
Enhancing the performance of OFDMA underlay cognitive radio networks via secondary pattern nulling and primary beam steering
( IEEE , 2011 , Conference)Cognitive radio networks are receiving a lot of research attention lately. Most user equipment in state-of-the-art wireless communication systems are equipped with two antennas. In this paper, we take advantage of the two ... -
Novel time-frequency reservation Aloha scheme for OFDMA systems
( IEEE , 2011 , Conference)A novel reservation Aloha scheme is presented for OFDMA systems. The proposed scheme is based on two dimensional reservation in time and frequency. The proposed approach is compared to other OFDMA extensions of reservation ... -
Beam and RB allocation in LTE uplink with opportunistic beamforming
( IEEE , 2011 , Conference)Opportunistic beamforming is investigated in the context of multicell LTE uplink resource allocation. A scheduling algorithm based on beam and resource block (RB) allocation with opportunistic beamforming is presented. ... -
A novel distributed scheduling scheme for OFDMA uplink using channel information and probabilistic transmission
( Elsevier , 2011 , Article)Distributed uplink scheduling in OFDMA systems is considered. In the proposed model, mobile terminals have the responsibility of making their own transmission decisions. The proposed scheme is based on two dimensional ... -
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. ... -
A fairness-based preemption algorithm for LTE-Advanced
( IEEE , 2012 , Conference)In this paper, we propose a fairness-based preemption algorithm for 3GPP LTE-Advanced. It considers bearers' priorities as well as their QoS over-provisioning with respect to their minimum QoS needs into the partial ... -
On real-time video streaming over LTE networks with mobile-to-mobile cooperation
( IEEE , 2012 , Conference)Real-time video streaming over LTE networks is investigated in the presence of mobile-to-mobile collaboration. Mobiles are grouped into collaborative clusters using a low-complexity clustering algorithm. In each cluster, ... -
Green communications in LTE networks with environmentally friendly small cell base stations
( IEEE , 2012 , Conference)Green communications in LTE networks with environmentally friendly small cell base stations (BSs) are investigated. An approach to reassign mobile users to different LTE BSs is proposed. The objective is to achieve energy ... -
Cooperative relay-based multicasting for energy and delay minimization
( IEEE , 2012 , Conference)Relay-based multicasting for the purpose of cooperative content distribution is studied. Optimized relay selection is performed with the objective of minimizing the energy consumption or the content distribution delay ... -
Distributed Load Balancing through Self Organisation of cell size in cellular systems
( IEEE , 2012 , Conference)Uneven traffic load among the cells increases call blocking rates in some cells and causes low resource utilisation in other cells and thus degrades user satisfaction and overall performance of the cellular system. Various ... -
Call admission control with resource reservation for multi-service OFDM networks
( IEEE , 2012 , Conference)In OFDM wireless networks, the radio resources are assigned to the users based on their quality of service needs and depending on their channel quality. Thus, during a call session, the bandwidth requirements and needed ... -
Delay efficient cooperation in public safety vehicular networks using LTE and IEEE 802.11p
( IEEE , 2012 , Conference)Cooperative schemes for critical content distribution over vehicular networks are presented and analyzed. The first scheme is based on unicasting from the base station, whereas the second is based on threshold based ... -
Performance study of the implementation of green communications in LTE networks
( IEEE , 2012 , Conference)The application of green communications to LTE networks is analyzed. An approach to reassign mobile users to different LTE BSs is proposed. The objective is to achieve energy savings by switching off lightly loaded BSs ... -
Energy-efficient Device-to-Device communications in LTE public safety networks
( IEEE , 2012 , Conference)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 ... -
Optimized green operation of LTE networks in the presence of multiple electricity providers
( IEEE , 2012 , Conference)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 ... -
Heterogeneous LTE/802.11a mobile relays for data rate enhancement and energy-efficiency in high speed trains
( IEEE , 2012 , Conference)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) ... -
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 ...