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Imperial College London
(106 results)-
White Papers
Network Routing Control With G-Networks
March 17, 2011, 12:00am PDT
G-Networks are queueing networks in which the novel idea of 'Negative customers' has been introduced. In contrast with the regular customers, called positive customers and treated in the normal...
Provided by Imperial College London
-
Whitepapers
WikiSensing: An Online Collaborative Approach for Sensor Data Management
October 1, 2012, 12:00am PDT
This paper presents a new methodology for collaborative sensor data management known as WikiSensing. It is a novel approach that incorporates online collaboration with sensor data management. The...
Provided by Imperial College London
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White Papers
QoI-Aware Wireless Sensor Network Management for Dynamic Multi-Task Operations
April 23, 2010, 12:00am PDT
QoI-aware WSN O&M represents a broad area of research challenges that this paper only begins to address. Contrary to other research focusing on the network utility maximization problem with...
Provided by Imperial College London
-
White Papers
Utility-Based Gateway Deployment for Supporting Multi-Domain DTNs
April 18, 2010, 12:00am PDT
Due to technology or policy constraints, communications across network domains usually require the intervention of gateways, and their proper deployment is crucial to the overall performance. In...
Provided by Imperial College London
-
White Papers
Enabling Inter-Domain DTN Communications by Networked Static Gateways
July 27, 2009, 12:00am PDT
Due to technology or policy constraints, communications across domains usually require the intervention of gateways, and their proper deployment is crucial to the overall system. This paper...
Provided by Imperial College London
-
White Papers
On the Application of Network Coding With Diversity to Opportunistic Scheduling
July 29, 2009, 12:00am PDT
In this paper, the authors study the application of network coding to opportunistic scheduling for wireless uplink channels. The key idea proposed in this paper is to always schedule the user with...
Provided by Imperial College London
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Whitepapers
Privacy-Preserving Location and Mobility Management to Support Tether-Free Patients in Ad-Hoc Networks
May 24, 2012, 12:00am PDT
A major driver of healthcare cost is the inefficiencies associated keeping less-critical patients overnight in the hospital when these patients could be treated as outpatients and received...
Provided by Imperial College London
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Whitepapers
Secure Execution of Distributed Session Programs
October 19, 2011, 12:00am PDT
The development of the SJ Framework for session-based distributed programming is part of recent and ongoing research into integrating session types and practical, real-world programming languages....
Provided by Imperial College London
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Whitepapers
Energy Efficient Resource Allocation Strategy for Cloud Data Centres
September 1, 2011, 12:00am PDT
Cloud computing data centres are emerging as new candidates for replacing traditional data centres. Cloud data centres are growing rapidly in both number and capacity to meet the increasing...
Provided by Imperial College London
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Whitepapers
A New Distributed Optimization Framework for Hybrid Ad-Hoc Networks
August 29, 2011, 12:00am PDT
The continuously increasing demand for resources in modern networks urges for more efficient resource allocation. Such an allocation of resources to network users can be formulated as an...
Provided by Imperial College London
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Whitepapers
MIMO Routing With QoS Provisioning
November 11, 2008, 12:00am PST
Multiple-Input-Multiple-Output (MIMO) transceivers can take advantage of random channel fading and multi-path delay spread for multiplying transfer rates (multiplexing gain), improve transmission...
Provided by Imperial College London
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White Papers
A Framework for Opportunistic Allocation of Wireless Resources
September 5, 2007, 12:00am PDT
Wireless multi-hop, mesh networks are being considered as a candidate to backhaul data traffic from access networks to the wired Internet. To enhance system performance, scheduling algorithms for...
Provided by Imperial College London
-
White Papers
On Proportional Fair Scheduling in Multi-Antenna Wireless Mesh Networks - Theoretical Analysis
August 13, 2008, 12:00am PDT
Proportional Fair Scheduling (PFS) provides good balance between throughput and fairness via multi-user diversity and game-theoretic equilibrium. Very little analytical work exists on...
Provided by Imperial College London
-
White Papers
Proportional Fair Scheduling: Analytical Insight Under Rayleigh Fading Environment
December 29, 2007, 12:00am PST
This paper provides analytical expressions to evaluate the performance of a random access wireless network in terms of user throughput and network throughput, subject to the constraint of...
Provided by Imperial College London
-
White Papers
Fair Resource Allocation Under Rayleigh And/or Rician Fading Environments
June 22, 2008, 12:00am PDT
Proportional Fair Scheduling (PFS) provides good balance between throughput and fairness via multi-user diversity and game-theoretic equilibrium. Very little analytical work exists on...
Provided by Imperial College London
-
White Papers
A Cross-Layer Framework of QoS Routing and Distributed Scheduling for Mesh Networks
February 18, 2008, 12:00am PST
Cross-layer routing and scheduling algorithms design for wireless backhaul mesh network has attracted much research interest recently. The network is expected to support various types of...
Provided by Imperial College London
-
White Papers
A Distributed Scheduling Algorithm With QoS Provisions in Multi-Hop Wireless Mesh Networks
August 15, 2008, 12:00am PDT
Multi-hop Wireless Mesh Networks (WMNs) are considered a promising technology to backhaul heterogeneous data traffic from wireless access networks to the wired Internet. WMNs are expected to...
Provided by Imperial College London
-
White Papers
A Novel Cross-Layer QoS Routing Algorithm for Wireless Mesh Networks
December 7, 2007, 12:00am PST
Wireless Mesh Networks (WMNs) are expected to support various types of applications with different Quality of Service (QoS) requirements. Existing works are limited to layered approaches that...
Provided by Imperial College London
-
White Papers
An Efficient Cross-Layer Simulation Architecture for Mesh Networks
January 16, 2009, 12:00am PST
Wireless Mesh Networks (WMNs) are emerging as a promising technology for backhauling data traffic from wireless access networks to the wired Internet. Such networks are expected to support various...
Provided by Imperial College London
-
White Papers
Cross-Layer Design for QoS in Wireless Mesh Networks
March 15, 2009, 12:00am PDT
Cross-layer design for Quality of Service (QoS) in Wireless Mesh Networks (WMNs) has attracted much research interest recently. Such networks are expected to support various types of applications...
Provided by Imperial College London
-
White Papers
Dynamic Control of Data Ferries Under Partial Observations
January 3, 2010, 12:00am PST
Controlled mobile helper nodes called data ferries have recently been proposed to bridge communications between disconnected nodes in a delay-tolerant manner. While existing work has explored...
Provided by Imperial College London
-
White Papers
Cooperative Transmit-Power Estimation in MANETs
January 4, 2008, 12:00am PST
Transmit-power estimation is an important part in power-aware designs of Mobile Ad-hoc NETworks (MANETs). In this paper, the authors consider the cooperation among multiple monitor-nodes to...
Provided by Imperial College London
-
White Papers
Connectivity Dynamics for Vehicular Ad-Hoc Networks in Signalized Road Systems
July 29, 2009, 12:00am PDT
In this paper, the authors analyze the connectivity dynamics of vehicular ad-hoc networks in a generic signalized urban route. Given the velocity profile of an urban route as a function of space...
Provided by Imperial College London
-
White Papers
Optimal Transmission Probabilities in VANETs With Inhomogeneous Node Distribution
July 28, 2009, 12:00am PDT
In a Vehicular Ad-hoc NETwork (VANET), the amount of interference from neighboring nodes to a communication link is governed by the vehicle density dynamics in vicinity and transmission...
Provided by Imperial College London
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White Papers
Hierarchical Mobility Control for Data Ferries Under Constrained Message Delays
June 8, 2011, 12:00am PDT
The authors consider the problem of controlling mobile data ferries for message delivery among disconnected, scattered domains in a highly partitioned network. Existing work on data ferry control...
Provided by Imperial College London
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White Papers
Energy-Efficient Broadcasts in Wireless Sensor Networks With Multiple Virtual Channels
December 22, 2009, 12:00am PST
Multichannel solutions are increasingly used to cope with the problem of low capacity in sensor networks resulting from high contention during wake-up periods of nodes. The authors can consider...
Provided by Imperial College London
-
White Papers
Preamble Sampling MAC Protocols With Persistent Receivers in Wireless Sensor Networks
March 20, 2009, 12:00am PDT
The authors provide an analytical framework for preamble sampling techniques for MAC protocols in wireless sensor networks, from which they derive closed-form formulas for lifetime and reliability...
Provided by Imperial College London
-
White Papers
Randomized Scheduling Algorithm for Data Aggregation in Wireless Sensor Networks
February 2, 2010, 12:00am PST
The authors consider a wireless sensor network in which a routing tree has been established to transmit the information from a set of source nodes to a data sink. The existing algorithms to...
Provided by Imperial College London
-
White Papers
A Test-Based Scheduling Protocol (TBSP) for Periodic Data Gathering in Wireless Sensor Networks
July 26, 2010, 12:00am PDT
The authors propose TBSP, a TDMA protocol for gathering information periodically from multiple data sources to a central location across multiple hops. TBSP incurs a lower overhead than the...
Provided by Imperial College London
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White Papers
Clique-Based Location Estimations for Wireless Sensors in GPS-Free Environments
May 26, 2008, 12:00am PDT
In this paper, the authors present a distributed, self-organizing, localization method for wireless sensors and a scheme for reducing position estimate errors by employing a novel concept of...
Provided by Imperial College London
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White Papers
Link Residual-Time Estimation for VANET Cross-Layer Design
April 29, 2009, 12:00am PDT
Traditional network design may underestimate the dependencies between different layers of the protocol stack and fail to exploit the direct coupling of physical-layer operations to the network...
Provided by Imperial College London
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White Papers
Link Classification and Residual Time Estimation Through Adaptive Modeling for VANETs
January 26, 2009, 12:00am PST
Vehicular ad hoc networks design has drawn a lot of research attention. High node mobility, an inherent characteristic of VANETs, results in short lived links and rapid topology changes; this...
Provided by Imperial College London
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White Papers
On the Design of a Quality-of-Service Driven Routing Protocol for Wireless Cooperative Networks
April 27, 2008, 12:00am PDT
In this paper, a quality-of-service driven routing protocol is proposed for wireless cooperative networks. The key contribution of the proposed protocol is to bring the performance gain of...
Provided by Imperial College London
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White Papers
Simple Solutions for the Second Decade of Wireless Sensor Networking
March 5, 2010, 12:00am PST
At 2010, the authors are at the effective end of the first decade of Wireless Sensor Network (WSN) research and that the aspects such as energy efficient routing have pretty much had their day as...
Provided by Imperial College London
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White Papers
Deconstructing Internet Paths: An Approach for AS-Level Detour Route Discovery
March 24, 2009, 12:00am PDT
Detour paths provide overlay networks with improved performance and resilience. Finding good detour routes with methods that scale to millions of nodes is a challenging problem. The authors...
Provided by Imperial College London
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White Papers
Neighbor Discovery With Activity Monitoring in Multichannel Wireless Mesh Networks
January 4, 2010, 12:00am PST
One way of improving performance of wireless mesh networks is to use multiple non-overlapping channels. At the same time, the mesh network must continuously self-adapt to varying radio conditions...
Provided by Imperial College London
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White Papers
Presentation Abstract: Remote Elderly Care Monitoring in WASP
March 2, 2010, 12:00am PST
The European project "Wireless Accessible Sensor Populations" (WASP) aims to develop cost-efficient solutions to facilitate WSN deployment and application-driven optimization. This paper addresses...
Provided by Imperial College London
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White Papers
Towards a Radio-Controlled Time Synchronized Wireless Sensor Network
September 1, 2010, 12:00am PDT
Wireless sensor networks are deployed to monitor real-world phenomena, and are seeing growing demand in commerce and industry. These networks can benefit from time synchronized clocks on...
Provided by Imperial College London
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White Papers
YA-MAC: Handling Unified Unicast and Broadcast Traffic in Multi-Hop Wireless Sensor Networks
April 25, 2011, 12:00am PDT
This paper introduces YA-MAC, an agile Medium Access Control (MAC) protocol to provide high throughput for both unicast and broadcast traffic in Duty-Cycled Multi-hop Wireless Sensor Networks...
Provided by Imperial College London
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White Papers
Rule-Based Verification of Network Protocol Implementations Using Symbolic Execution
May 15, 2011, 12:00am PDT
The secure and correct implementation of network protocols for resource discovery, device configuration and network management is complex and error-prone. Protocol specifications contain...
Provided by Imperial College London
-
White Papers
Link Residual-Time Estimation for VANET Cross-Layer Design
April 29, 2009, 12:00am PDT
Traditional network design may underestimate the dependencies between different layers of the protocol stack and fail to exploit the direct coupling of physical-layer operations to the network...
Provided by Imperial College London
-
White Papers
Clique-Based Location Estimations for Wireless Sensors in GPS-Free Environments
May 26, 2008, 12:00am PDT
In this paper, the authors present a distributed, self-organizing, localization method for wireless sensors and a scheme for reducing position estimate errors by employing a novel concept of...
Provided by Imperial College London
-
White Papers
A Test-Based Scheduling Protocol (TBSP) for Periodic Data Gathering in Wireless Sensor Networks
July 26, 2010, 12:00am PDT
The authors propose TBSP, a TDMA protocol for gathering information periodically from multiple data sources to a central location across multiple hops. TBSP incurs a lower overhead than the...
Provided by Imperial College London
-
White Papers
Randomized Scheduling Algorithm for Data Aggregation in Wireless Sensor Networks
February 2, 2010, 12:00am PST
The authors consider a wireless sensor network in which a routing tree has been established to transmit the information from a set of source nodes to a data sink. The existing algorithms to...
Provided by Imperial College London
-
White Papers
Preamble Sampling MAC Protocols With Persistent Receivers in Wireless Sensor Networks
March 20, 2009, 12:00am PDT
The authors provide an analytical framework for preamble sampling techniques for MAC protocols in wireless sensor networks, from which they derive closed-form formulas for lifetime and reliability...
Provided by Imperial College London
-
White Papers
Energy-Efficient Broadcasts in Wireless Sensor Networks With Multiple Virtual Channels
December 22, 2009, 12:00am PST
Multichannel solutions are increasingly used to cope with the problem of low capacity in sensor networks resulting from high contention during wake-up periods of nodes. The authors can consider...
Provided by Imperial College London
-
White Papers
Hierarchical Mobility Control for Data Ferries Under Constrained Message Delays
June 8, 2011, 12:00am PDT
The authors consider the problem of controlling mobile data ferries for message delivery among disconnected, scattered domains in a highly partitioned network. Existing work on data ferry control...
Provided by Imperial College London
-
White Papers
Optimal Transmission Probabilities in VANETs With Inhomogeneous Node Distribution
July 28, 2009, 12:00am PDT
In a Vehicular Ad-hoc NETwork (VANET), the amount of interference from neighboring nodes to a communication link is governed by the vehicle density dynamics in vicinity and transmission...
Provided by Imperial College London
-
White Papers
Connectivity Dynamics for Vehicular Ad-Hoc Networks in Signalized Road Systems
July 29, 2009, 12:00am PDT
In this paper, the authors analyze the connectivity dynamics of vehicular ad-hoc networks in a generic signalized urban route. Given the velocity profile of an urban route as a function of space...
Provided by Imperial College London
-
White Papers
Cooperative Transmit-Power Estimation in MANETs
January 4, 2008, 12:00am PST
Transmit-power estimation is an important part in power-aware designs of Mobile Ad-hoc NETworks (MANETs). In this paper, the authors consider the cooperation among multiple monitor-nodes to...
Provided by Imperial College London
-
White Papers
Dynamic Control of Data Ferries Under Partial Observations
January 3, 2010, 12:00am PST
Controlled mobile helper nodes called data ferries have recently been proposed to bridge communications between disconnected nodes in a delay-tolerant manner. While existing work has explored...
Provided by Imperial College London
-
White Papers
Cross-Layer Design for QoS in Wireless Mesh Networks
March 15, 2009, 12:00am PDT
Cross-layer design for Quality of Service (QoS) in Wireless Mesh Networks (WMNs) has attracted much research interest recently. Such networks are expected to support various types of applications...
Provided by Imperial College London
-
White Papers
An Efficient Cross-Layer Simulation Architecture for Mesh Networks
January 16, 2009, 12:00am PST
Wireless Mesh Networks (WMNs) are emerging as a promising technology for backhauling data traffic from wireless access networks to the wired Internet. Such networks are expected to support various...
Provided by Imperial College London
-
White Papers
A Novel Cross-Layer QoS Routing Algorithm for Wireless Mesh Networks
December 7, 2007, 12:00am PST
Wireless Mesh Networks (WMNs) are expected to support various types of applications with different Quality of Service (QoS) requirements. Existing works are limited to layered approaches that...
Provided by Imperial College London
-
White Papers
A Distributed Scheduling Algorithm With QoS Provisions in Multi-Hop Wireless Mesh Networks
August 15, 2008, 12:00am PDT
Multi-hop Wireless Mesh Networks (WMNs) are considered a promising technology to backhaul heterogeneous data traffic from wireless access networks to the wired Internet. WMNs are expected to...
Provided by Imperial College London
-
White Papers
A Cross-Layer Framework of QoS Routing and Distributed Scheduling for Mesh Networks
February 18, 2008, 12:00am PST
Cross-layer routing and scheduling algorithms design for wireless backhaul mesh network has attracted much research interest recently. The network is expected to support various types of...
Provided by Imperial College London
-
White Papers
Fair Resource Allocation Under Rayleigh And/or Rician Fading Environments
June 22, 2008, 12:00am PDT
Proportional Fair Scheduling (PFS) provides good balance between throughput and fairness via multi-user diversity and game-theoretic equilibrium. Very little analytical work exists on...
Provided by Imperial College London
-
White Papers
Proportional Fair Scheduling: Analytical Insight Under Rayleigh Fading Environment
December 29, 2007, 12:00am PST
This paper provides analytical expressions to evaluate the performance of a random access wireless network in terms of user throughput and network throughput, subject to the constraint of...
Provided by Imperial College London
-
White Papers
On Proportional Fair Scheduling in Multi-Antenna Wireless Mesh Networks - Theoretical Analysis
August 13, 2008, 12:00am PDT
Proportional Fair Scheduling (PFS) provides good balance between throughput and fairness via multi-user diversity and game-theoretic equilibrium. Very little analytical work exists on...
Provided by Imperial College London
-
White Papers
A Framework for Opportunistic Allocation of Wireless Resources
September 5, 2007, 12:00am PDT
Wireless multi-hop, mesh networks are being considered as a candidate to backhaul data traffic from access networks to the wired Internet. To enhance system performance, scheduling algorithms for...
Provided by Imperial College London
-
White Papers
On the Application of Network Coding With Diversity to Opportunistic Scheduling
July 29, 2009, 12:00am PDT
In this paper, the authors study the application of network coding to opportunistic scheduling for wireless uplink channels. The key idea proposed in this paper is to always schedule the user with...
Provided by Imperial College London
-
White Papers
Enabling Inter-Domain DTN Communications by Networked Static Gateways
July 27, 2009, 12:00am PDT
Due to technology or policy constraints, communications across domains usually require the intervention of gateways, and their proper deployment is crucial to the overall system. This paper...
Provided by Imperial College London
-
White Papers
Utility-Based Gateway Deployment for Supporting Multi-Domain DTNs
April 18, 2010, 12:00am PDT
Due to technology or policy constraints, communications across network domains usually require the intervention of gateways, and their proper deployment is crucial to the overall performance. In...
Provided by Imperial College London
-
White Papers
QoI-Aware Wireless Sensor Network Management for Dynamic Multi-Task Operations
April 23, 2010, 12:00am PDT
QoI-aware WSN O&M represents a broad area of research challenges that this paper only begins to address. Contrary to other research focusing on the network utility maximization problem with...
Provided by Imperial College London
-
White Papers
Network Routing Control With G-Networks
March 17, 2011, 12:00am PDT
G-Networks are queueing networks in which the novel idea of 'Negative customers' has been introduced. In contrast with the regular customers, called positive customers and treated in the normal...
Provided by Imperial College London
-
White Papers
Random Re-Routing With Traffic Reduction for Wireless Sensor Networks
May 7, 2008, 12:00am PDT
Wireless Sensor Networks carry much traffic of routine data that are measured by sensors which monitor the environment. When unusual events occur, high priority traffic are generated to report...
Provided by Imperial College London
-
White Papers
Experimental Insights Into Quality of Information
June 12, 2008, 12:00am PDT
In this paper the authors examine the Quality of Information (QoI) at the output of a wireless sensor network by considering the difference between the monitored environment and the interpreted...
Provided by Imperial College London
-
White Papers
Simulating the Power Consumption of Computer Networks
October 11, 2010, 12:00am PDT
The authors introduce a high-fidelity simulation model to evaluate the power consumption of computer networks derived from measured data on routers. To this end, they design and use a power...
Provided by Imperial College London
-
White Papers
A Multiple Criteria, Measurement-Based Admission Control Mechanism for Self-Aware Networks
May 14, 2008, 12:00am PDT
High demand and network congestion, can prevent multimedia applications and users from obtaining the network service they require for a successful operation. A way to control traffic congestion...
Provided by Imperial College London
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White Papers
A Sensor Network to Profile the Electrical Power Consumption of Computer Networks
August 27, 2010, 12:00am PDT
The authors introduce a sensor network to measure the individual power consumption of a large number of network elements in near-real time. A main application of this system is to obtain profiles...
Provided by Imperial College London
-
White Papers
Adaptive Packet Prioritisation for Wireless Sensor Networks
February 11, 2009, 12:00am PST
The cost of a large wireless sensor network consisting of hundreds of devices may only be justified if it is deployed for multiple monitoring tasks. Introducing multiple tasks to the system...
Provided by Imperial College London
-
White Papers
Quality of Information: An Empirical Approach
July 7, 2008, 12:00am PDT
In this paper the authors examine the Quality of Information (QoI) at the output of a wireless sensor network by considering the difference between the monitored environment and the interpreted...
Provided by Imperial College London
-
White Papers
Energy and Time Trade-Offs in Duplicate Packet Transmission
July 13, 2007, 12:00am PDT
Sensor and ad hoc networks are designed to function in uncertain environments. The transmission medium, the possible mobility and unreliability of nodes, and possible malicious interventions by...
Provided by Imperial College London
-
White Papers
Self-Healing for Pervasive Computing Systems
February 28, 2010, 12:00am PST
The development of small wireless sensors and smart-phones, which include various sound, video, motion and location sensors have facilitated new pervasive applications. These pervasive systems are...
Provided by Imperial College London
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White Papers
A Framework for Energy Aware Routing in Packet Networks
January 1, 2009, 12:00am PST
The increasing importance of wired packet networks as the transport substrate on which many communication technologies are converging also increases the importance of making these networks...
Provided by Imperial College London
-
White Papers
Admission of Packet Flows in a Self-Aware Network
July 20, 2007, 12:00am PDT
The demand for stable and reliable networks which can offer packet delivery under Quality of Service constraints led to the development of autonomous networks that use adaptive packet routing in...
Provided by Imperial College London
-
White Papers
Energy-Aware Routing in the Cognitive Packet Network
March 17, 2011, 12:00am PDT
An Energy Aware Routing Protocol (EARP) is proposed to minimise a performance metric that combines the total consumed power in the network and the QoS that is specified for the flows. The...
Provided by Imperial College London
-
White Papers
Routing and G-Networks to Optimise Energy and Quality of Service in Packet Networks
July 23, 2010, 12:00am PDT
The authors formulate the problem of joint energy and Quality of Service (QoS) optimisation in packet networks and show how it can be formalised using the control capabilities inherent in...
Provided by Imperial College London
-
White Papers
A Distributed Admission Control Mechanism for Multi-Criteria QoS
August 26, 2010, 12:00am PDT
Admission control based on multiple criteria has always been a desirable feature for computer networks. In the past, the authors presented such a system, but it was based on a centralised decision...
Provided by Imperial College London
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White Papers
Performance Trade-Offs in a Network Coding Router
May 14, 2010, 12:00am PDT
The authors consider the problem of optimizing the performance of a network coding router with two stochastic flows. They develop a queuing model which accounts for the fact that coding is not...
Provided by Imperial College London
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