Uppror Media Group

Displaying 1-23 of 23 results

  • White Papers // Jul 2013

    Skew Handling in Aggregate Streaming Queries on GPUs

    Now-a-days, the data to be processed by database systems has grown so large that any conventional, centralized technique is inadequate. At the same time, General Purpose computation on GPU (GPGPU) recently has successfully drawn attention from the data management community due to its ability to achieve significant speed-ups at a...

    Provided By Uppror Media Group

  • White Papers // Apr 2013

    Electronically-Switched Directional Antennas for Wireless Sensor Networks: A Full-Stack Evaluation

    The authors study the benefits of Electronically-Switched Directional (ESD) antennas in Wireless Sensor Networks (WSNs). ESD antennas have proved beneficial in cellular and ad-hoc networks, by increasing the communication range and by alleviating contention in directions other than the destination. The advantages in WSNs are, however, still largely to be...

    Provided By Uppror Media Group

  • White Papers // Jan 2013

    An Integrated Specification and Verification Technique for Highly Concurrent Data Structures

    The authors present a technique for automatically verifying safety properties of concurrent programs, in particular programs which rely on subtle dependencies of local states of different threads, such as lock-free implementations of stacks and queues in an environment without garbage collection. Their technique addresses the joint challenges of infinite-state specifications,...

    Provided By Uppror Media Group

  • White Papers // Dec 2012

    Understanding Link Dynamics in Wireless Sensor Networks With Dynamically Steerable Directional Antennas

    By radiating the power in the direction of choice, Electronically Switched Directional (ESD) antennas can reduce network contention and avoid packet loss. There exists some ESD antennas for wireless sensor networks, but so far researchers have mainly evaluated their directionality. There are no studies regarding the link dynamics of ESD...

    Provided By Uppror Media Group

  • White Papers // May 2012

    Measurement-Based Evaluation of Robust Linear Precoding for Downlink CoMP

    The authors study the design and evaluation of joint processing Coordinated Multi-Point (CoMP) downlink transmission. Precoders will then be designed based on outdated Channel State Information (CSI), so interference cannot be eliminated completely as by an ideal Zero-Forcing (ZF) solution. They here strive to design and evaluate realistic linear transmit...

    Provided By Uppror Media Group

  • White Papers // May 2012

    Avoiding Overages by Deferred Aggregate Demand for PEV Charging on the Smart Grid

    The authors model the aggregate overnight demand for electricity by a large community of (possibly hybrid) Plug-in Electric Vehicles (PEVs) each of whose power demand follows a prescribed profile and is interruptible. Rather than a spot-price system for household consumers (which would necessarily need to be operated by automated means...

    Provided By Uppror Media Group

  • White Papers // Mar 2012

    A Ubiquitous Publish/Subscribe Platform for Wireless Sensor Networks with Mobile Mules

    Existing publish/subscribe architectures for wireless sensors networks only support stationary sensors interconnected with each other. They cannot handle mobile sensors or remote sensors that are sparsely deployed. In this paper, the authors propose a novel ubiquitous publish/subscribe system that supports data access from both mobile sensors and stationary sensors. Their...

    Provided By Uppror Media Group

  • White Papers // Mar 2012

    An Optimisation-Based Approach for Wireless Sensor Deployment in Mobile Sensing Environments

    The authors consider a novel application in wireless sensor networks where mobile phones and wireless sensors can collaborate to collect sensing data. Although mobile phones can perform sensing at different locations, it is a challenge to provide stable sensing quality and availability over the entire area. One approach is to...

    Provided By Uppror Media Group

  • White Papers // Mar 2012

    A Location-Based Publish/Subscribe Framework for Wireless Sensors and Mobile Phones

    Wireless Sensor Networks (WSNs) have been widely deployed for environmental monitoring and urban sensing applications. With the advancement of mobile phones, mobile users have increasing demands for sensing data relevant to their locations and activities. It is crucial to support reliable ubiquitous sensing for mobile users to retrieve sensing data...

    Provided By Uppror Media Group

  • White Papers // Jan 2012

    Counter-Example Guided Fence Insertion under TSO

    The authors give a sound and complete fence insertion procedure for concurrent finite-state programs running under the classical TSO memory model. This model allows \"Write to read\" relaxation corresponding to the addition of an unbounded store buffer between each processor and the main memory. They introduce a novel machine model,...

    Provided By Uppror Media Group

  • White Papers // Jan 2012

    B-IFDMA - A Power Efficient Multiple Access Scheme for Non-Frequency-Adaptive Transmission

    Within the EU FP6 Integrated Projects WINNER and WINNER II, multiple access schemes for frequency-adaptive and non-frequency-adaptive transmission for a future broadband mobile wireless system are investigated. This paper presents a novel power efficient multiple access scheme for non-frequency-adaptive uplink transmission denoted Block Interleaved Frequency Division Multiple Access (B-IFDMA), which...

    Provided By Uppror Media Group

  • White Papers // Oct 2011

    On Kalman Filtering With Fading Wireless Channels Governed by Power Control

    The authors study stochastic stability for Kalman filtering over fading wireless channels where variable channel gains are counteracted by the use of power control to alleviate the effects of packet drops. The Kalman filter and the controller are located at a single gateway which acquires data from the wireless sensors....

    Provided By Uppror Media Group

  • White Papers // May 2011

    Mobile Sources in an Information-Centric Network with Hierarchical Names: An Indirection Approach

    An increasing amount of information is available from mobile devices. The authors consider the problem of retrieving data from mobile sources in an information-centric network architecture called Named Data Networking. They propose an approach in which indirection points locally map requests for persistent data names to requests for temporary location...

    Provided By Uppror Media Group

  • White Papers // Apr 2011

    Evaluation and Enhancement of TCP With Network Coding in Wireless Multihop Networks

    In this paper, the authors, based on NS-2 simulator, evaluate the performances of different TCP protocols with network coding in wireless multihop networks, and then propose two schemes to enhance the performances of TCPs with network coding. In particular the network coding scheme considered and used here is COPE, which...

    Provided By Uppror Media Group

  • White Papers // Mar 2011

    Stability of State Estimation Over Sensor Networks With Markovian Fading Channels

    Stochastic stability for centralized Kalman filtering over a wireless sensor network with correlated fading channels is studied. On their route to the gateway, sensor packets, possibly aggregated with measurements from several nodes, may be dropped because of fading links. By assuming the network states to be Markovian, the authors establish...

    Provided By Uppror Media Group

  • White Papers // Jul 2010

    Utility of Joint Processing Schemes

    Joint processing between base stations has been shown as an efficient technique to mitigate inter-cell interference and increase data rates, in particular at the cell edges. In this paper, the authors evaluate the utility of Internet applications in a joint processing enabled cluster of base stations. Utility is used to...

    Provided By Uppror Media Group

  • White Papers // Jun 2010

    Flow Augmenting Routing With Network Coding for Lifetime Maximization in Wireless Networks

    The life-time maximization routing with network coding in wireless multihop networks is considered in this paper. The problems are formulated in three different cases: no network coding, two-way network coding, and overhearing network coding. Flow Augmenting routing (FA) is used to solve the first case, and then it is extended...

    Provided By Uppror Media Group

  • White Papers // Jun 2010

    Dynamic Load Balancing in 3GPP LTE Multi-Cell Networks With Heterogeneous Services

    Load balancing among multi-cells in 3GPP Long Term Evolution (LTE) networks with heterogeneous services is investigated. It is formulated as a multi-objective optimization problem, the objectives of which are load balancing index of services with QoS requirements and network utility of other services. The constraints are physical resource limits and...

    Provided By Uppror Media Group

  • White Papers // Mar 2010

    Cross-Layer Optimization of Wireless Multi-Hop Networks with Network Coding

    In this paper, the authors present a cross-layer algorithm for joint optimization of congestion control, routing, and scheduling in wireless multi-hop networks with network coding. They introduce virtual flow variables in the formulation of capacity region of the networks. The utility maximization problem subject to constraints on the capacity region...

    Provided By Uppror Media Group

  • White Papers // Dec 2009

    Constrained Optimisation Over Massive Databases

    Constrained optimisation is increasingly considered by industry as a major candidate to cope with hard problems of practical relevance. However, the approach of exploiting, in those scenarios, current constraint or mathematical programming solvers has severe limitations, which clearly demand new methods: data is usually stored in potentially very-large databases, and...

    Provided By Uppror Media Group

  • White Papers // Jul 2009

    Cost Design for Cross-Layer Resource Allocation in Cognitive Radio Ad Hoc Networks

    In this paper, cost function for routing is studied. By introduction of improved cost function, an improved algorithm is proposed. Compared with the original algorithm, the improved algorithm is more stable and the feasible solution obtained is closer to the upper bound of optimal solution. The optimal solution lies between...

    Provided By Uppror Media Group

  • White Papers // May 2009

    New Response Time Bounds for Fixed Priority Multiprocessor Scheduling

    Recently, there have been several promising techniques developed for schedulability analysis and response time analysis for multiprocessor systems based on over-approximation. This paper contains two contributions. First, to improve the analysis precision, the authors apply Baruah's window analysis framework to response time analysis for sporadic tasks on multiprocessor systems where...

    Provided By Uppror Media Group

  • White Papers // Nov 2008

    Innovations-Based State Estimation With Wireless Sensor Networks

    The authors study a state estimation architecture for sensor networks, where several sensors transmit quantized innovations to a central estimator. Transmission is via a wireless channel, which is prone to fading leading to random packet loss. State estimation is carried out at the gateway via a time-varying Kalman filter which...

    Provided By Uppror Media Group

  • White Papers // Jul 2013

    Skew Handling in Aggregate Streaming Queries on GPUs

    Now-a-days, the data to be processed by database systems has grown so large that any conventional, centralized technique is inadequate. At the same time, General Purpose computation on GPU (GPGPU) recently has successfully drawn attention from the data management community due to its ability to achieve significant speed-ups at a...

    Provided By Uppror Media Group

  • White Papers // Mar 2012

    A Ubiquitous Publish/Subscribe Platform for Wireless Sensor Networks with Mobile Mules

    Existing publish/subscribe architectures for wireless sensors networks only support stationary sensors interconnected with each other. They cannot handle mobile sensors or remote sensors that are sparsely deployed. In this paper, the authors propose a novel ubiquitous publish/subscribe system that supports data access from both mobile sensors and stationary sensors. Their...

    Provided By Uppror Media Group

  • White Papers // May 2011

    Mobile Sources in an Information-Centric Network with Hierarchical Names: An Indirection Approach

    An increasing amount of information is available from mobile devices. The authors consider the problem of retrieving data from mobile sources in an information-centric network architecture called Named Data Networking. They propose an approach in which indirection points locally map requests for persistent data names to requests for temporary location...

    Provided By Uppror Media Group

  • White Papers // Apr 2013

    Electronically-Switched Directional Antennas for Wireless Sensor Networks: A Full-Stack Evaluation

    The authors study the benefits of Electronically-Switched Directional (ESD) antennas in Wireless Sensor Networks (WSNs). ESD antennas have proved beneficial in cellular and ad-hoc networks, by increasing the communication range and by alleviating contention in directions other than the destination. The advantages in WSNs are, however, still largely to be...

    Provided By Uppror Media Group

  • White Papers // Dec 2012

    Understanding Link Dynamics in Wireless Sensor Networks With Dynamically Steerable Directional Antennas

    By radiating the power in the direction of choice, Electronically Switched Directional (ESD) antennas can reduce network contention and avoid packet loss. There exists some ESD antennas for wireless sensor networks, but so far researchers have mainly evaluated their directionality. There are no studies regarding the link dynamics of ESD...

    Provided By Uppror Media Group

  • White Papers // Dec 2009

    Constrained Optimisation Over Massive Databases

    Constrained optimisation is increasingly considered by industry as a major candidate to cope with hard problems of practical relevance. However, the approach of exploiting, in those scenarios, current constraint or mathematical programming solvers has severe limitations, which clearly demand new methods: data is usually stored in potentially very-large databases, and...

    Provided By Uppror Media Group

  • White Papers // May 2009

    New Response Time Bounds for Fixed Priority Multiprocessor Scheduling

    Recently, there have been several promising techniques developed for schedulability analysis and response time analysis for multiprocessor systems based on over-approximation. This paper contains two contributions. First, to improve the analysis precision, the authors apply Baruah's window analysis framework to response time analysis for sporadic tasks on multiprocessor systems where...

    Provided By Uppror Media Group

  • White Papers // Jan 2012

    Counter-Example Guided Fence Insertion under TSO

    The authors give a sound and complete fence insertion procedure for concurrent finite-state programs running under the classical TSO memory model. This model allows \"Write to read\" relaxation corresponding to the addition of an unbounded store buffer between each processor and the main memory. They introduce a novel machine model,...

    Provided By Uppror Media Group

  • White Papers // Jan 2013

    An Integrated Specification and Verification Technique for Highly Concurrent Data Structures

    The authors present a technique for automatically verifying safety properties of concurrent programs, in particular programs which rely on subtle dependencies of local states of different threads, such as lock-free implementations of stacks and queues in an environment without garbage collection. Their technique addresses the joint challenges of infinite-state specifications,...

    Provided By Uppror Media Group

  • White Papers // Jun 2010

    Flow Augmenting Routing With Network Coding for Lifetime Maximization in Wireless Networks

    The life-time maximization routing with network coding in wireless multihop networks is considered in this paper. The problems are formulated in three different cases: no network coding, two-way network coding, and overhearing network coding. Flow Augmenting routing (FA) is used to solve the first case, and then it is extended...

    Provided By Uppror Media Group

  • White Papers // Mar 2011

    Stability of State Estimation Over Sensor Networks With Markovian Fading Channels

    Stochastic stability for centralized Kalman filtering over a wireless sensor network with correlated fading channels is studied. On their route to the gateway, sensor packets, possibly aggregated with measurements from several nodes, may be dropped because of fading links. By assuming the network states to be Markovian, the authors establish...

    Provided By Uppror Media Group

  • White Papers // Oct 2011

    On Kalman Filtering With Fading Wireless Channels Governed by Power Control

    The authors study stochastic stability for Kalman filtering over fading wireless channels where variable channel gains are counteracted by the use of power control to alleviate the effects of packet drops. The Kalman filter and the controller are located at a single gateway which acquires data from the wireless sensors....

    Provided By Uppror Media Group

  • White Papers // Apr 2011

    Evaluation and Enhancement of TCP With Network Coding in Wireless Multihop Networks

    In this paper, the authors, based on NS-2 simulator, evaluate the performances of different TCP protocols with network coding in wireless multihop networks, and then propose two schemes to enhance the performances of TCPs with network coding. In particular the network coding scheme considered and used here is COPE, which...

    Provided By Uppror Media Group

  • White Papers // Jun 2010

    Dynamic Load Balancing in 3GPP LTE Multi-Cell Networks With Heterogeneous Services

    Load balancing among multi-cells in 3GPP Long Term Evolution (LTE) networks with heterogeneous services is investigated. It is formulated as a multi-objective optimization problem, the objectives of which are load balancing index of services with QoS requirements and network utility of other services. The constraints are physical resource limits and...

    Provided By Uppror Media Group

  • White Papers // Jul 2010

    Utility of Joint Processing Schemes

    Joint processing between base stations has been shown as an efficient technique to mitigate inter-cell interference and increase data rates, in particular at the cell edges. In this paper, the authors evaluate the utility of Internet applications in a joint processing enabled cluster of base stations. Utility is used to...

    Provided By Uppror Media Group

  • White Papers // Jul 2009

    Cost Design for Cross-Layer Resource Allocation in Cognitive Radio Ad Hoc Networks

    In this paper, cost function for routing is studied. By introduction of improved cost function, an improved algorithm is proposed. Compared with the original algorithm, the improved algorithm is more stable and the feasible solution obtained is closer to the upper bound of optimal solution. The optimal solution lies between...

    Provided By Uppror Media Group

  • White Papers // Mar 2010

    Cross-Layer Optimization of Wireless Multi-Hop Networks with Network Coding

    In this paper, the authors present a cross-layer algorithm for joint optimization of congestion control, routing, and scheduling in wireless multi-hop networks with network coding. They introduce virtual flow variables in the formulation of capacity region of the networks. The utility maximization problem subject to constraints on the capacity region...

    Provided By Uppror Media Group

  • White Papers // Nov 2008

    Innovations-Based State Estimation With Wireless Sensor Networks

    The authors study a state estimation architecture for sensor networks, where several sensors transmit quantized innovations to a central estimator. Transmission is via a wireless channel, which is prone to fading leading to random packet loss. State estimation is carried out at the gateway via a time-varying Kalman filter which...

    Provided By Uppror Media Group

  • White Papers // Jan 2012

    B-IFDMA - A Power Efficient Multiple Access Scheme for Non-Frequency-Adaptive Transmission

    Within the EU FP6 Integrated Projects WINNER and WINNER II, multiple access schemes for frequency-adaptive and non-frequency-adaptive transmission for a future broadband mobile wireless system are investigated. This paper presents a novel power efficient multiple access scheme for non-frequency-adaptive uplink transmission denoted Block Interleaved Frequency Division Multiple Access (B-IFDMA), which...

    Provided By Uppror Media Group

  • White Papers // May 2012

    Measurement-Based Evaluation of Robust Linear Precoding for Downlink CoMP

    The authors study the design and evaluation of joint processing Coordinated Multi-Point (CoMP) downlink transmission. Precoders will then be designed based on outdated Channel State Information (CSI), so interference cannot be eliminated completely as by an ideal Zero-Forcing (ZF) solution. They here strive to design and evaluate realistic linear transmit...

    Provided By Uppror Media Group

  • White Papers // May 2012

    Avoiding Overages by Deferred Aggregate Demand for PEV Charging on the Smart Grid

    The authors model the aggregate overnight demand for electricity by a large community of (possibly hybrid) Plug-in Electric Vehicles (PEVs) each of whose power demand follows a prescribed profile and is interruptible. Rather than a spot-price system for household consumers (which would necessarily need to be operated by automated means...

    Provided By Uppror Media Group

  • White Papers // Mar 2012

    An Optimisation-Based Approach for Wireless Sensor Deployment in Mobile Sensing Environments

    The authors consider a novel application in wireless sensor networks where mobile phones and wireless sensors can collaborate to collect sensing data. Although mobile phones can perform sensing at different locations, it is a challenge to provide stable sensing quality and availability over the entire area. One approach is to...

    Provided By Uppror Media Group

  • White Papers // Mar 2012

    A Location-Based Publish/Subscribe Framework for Wireless Sensors and Mobile Phones

    Wireless Sensor Networks (WSNs) have been widely deployed for environmental monitoring and urban sensing applications. With the advancement of mobile phones, mobile users have increasing demands for sensing data relevant to their locations and activities. It is crucial to support reliable ubiquitous sensing for mobile users to retrieve sensing data...

    Provided By Uppror Media Group