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EPFL
(61 results)-
White Papers
SOWER: SelfÂ-Organizing Wireless Network for Messaging
January 1, 2010, 12:00am PST
Short Message Service (SMS) has become extremely popular in many countries, and represents a multi-billion dollars market. Yet many consumers consider that the price cellular network operators...
Provided by EPFL
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White Papers
Self-Policing Mobile Ad-Hoc Networks
January 1, 2010, 12:00am PST
Misbehavior in mobile ad-hoc networks occurs for several reasons. Selfish nodes misbehave to save power or to improve their access to service relative to others. Malicious intentions result in...
Provided by EPFL
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White Papers
Teaching Enterprise Architecture and Service Oriented Architecture in Practice
June 6, 2007, 12:00am PDT
Many companies expect their IT developers to understand their business strategy and to specify IT systems that will impact favorably the execution of their business strategy. Enterprise...
Provided by EPFL
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White Papers
Performance Profiling in a Virtualized Environment
May 26, 2010, 12:00am PDT
Virtualization is a key enabling technology for cloud computing. Many applications deployed in a cloud run in virtual machines. However, profilers based on CPU performance counters do not work...
Provided by EPFL
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White Papers
Independent Faults in the Cloud
July 6, 2010, 12:00am PDT
Byzantine Fault Tolerant (BFT) protocols are replication-based solutions to the problem of tolerating the arbitrary failures of software and hardware components. The essential assumption for...
Provided by EPFL
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White Papers
Trustful Cumulus Clouds
December 1, 2010, 12:00am PST
Cloud computing offers an appealing business model and it is tempting for companies to delegate their IT services to the cloud. Yet, a company might find it risky to do so for sensible services...
Provided by EPFL
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White Papers
Joint Synchronization, Routing and Energy Saving in CSMA/CA Multi-Hop Hybrid Networks
March 3, 2010, 12:00am PST
Multi-hop hybrid networks can help providing both high bandwidth and broad coverage for wireless data networks. The authors focus on CSMA/CA-based networks and take IEEE 802.11 as a concrete...
Provided by EPFL
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White Papers
Network Loss Inference With Second Order Statistics of End-to-End Flows
August 23, 2007, 12:00am PDT
The authors address the problem of calculating link loss rates from end-to-end measurements. Contrary to existing works that use only the average end-to-end loss rates or strict temporal...
Provided by EPFL
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White Papers
GNSS-Based Positioning: Attacks and Countermeasures
December 30, 2009, 12:00am PST
Increasing numbers of mobile computing devices, user-portable, or embedded in vehicles, cargo containers, or the physical space, need to be aware of their location in order to provide a wide range...
Provided by EPFL
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White Papers
Middleware-Based Database Replication: The Gaps Between Theory and Practice
June 1, 2008, 12:00am PDT
The need for high availability and performance in data management systems has been fueling a long running interest in database replication from both academia and industry. However, academic groups...
Provided by EPFL
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White Papers
Deadlock Immunity: Enabling Systems To Defend Against Deadlocks
December 1, 2008, 12:00am PST
Deadlock immunity is a property by which programs, once afflicted by a given deadlock, develop resistance against future occurrences of that and similar deadlocks. The authors describe a technique...
Provided by EPFL
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White Papers
Secure Neighborhood Discovery: A Fundamental Element for Mobile Ad Hoc Networking
November 30, 2007, 12:00am PST
Pervasive computing systems will likely be deployed in the near future, with the proliferation of wireless devices and the emergence of ad hoc networking as key enablers. Coping with mobility and...
Provided by EPFL
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White Papers
Cell Phones as Imaging Sensors
April 20, 2010, 12:00am PDT
Camera phones are ubiquitous, and consumers have been adopting them faster than any other technology in modern history. When connected to a network, though, they are capable of more than just...
Provided by EPFL
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White Papers
A Mobile World of Security
July 30, 2010, 12:00am PDT
Mobile users are increasing fast in numbers, new types of services and applications become available, and new mobile systems (e.g., for intelligent transportation) emerge. Meanwhile, the need for...
Provided by EPFL
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White Papers
Least-Cost Opportunistic Routing
September 28, 2007, 12:00am PDT
In opportunistic routing, each node maintains a group of candidate relays to reach a particular destination, and transmits packets to any node in this group. If a single candidate relay receives...
Provided by EPFL
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White Papers
Hierarchical Routing in Dynamic -Doubling Networks
August 31, 2007, 12:00am PDT
In this paper the authors formulate the problem of routing over dynamic networks with finite doubling dimension. This is motivated by communication in mobile wireless networks, where the...
Provided by EPFL
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White Papers
Game Theory in Wireless Networks: A Tutorial
June 25, 2007, 12:00am PDT
The behavior of a given wireless device may affect the communication capabilities of a neighboring device, notably because the radio communication channel is usually shared in wireless networks....
Provided by EPFL
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White Papers
SeTraStream: Semantic-Aware Trajectory Construction Over Streaming Movement Data
May 28, 2011, 12:00am PDT
With the growth of location-based tracking technology like GPS, RFID and GSM networks, an enormous amount of trajectory data are generated from various real life applications, including traffic...
Provided by EPFL
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White Papers
NC Node Selection Game in Collaborative Streaming Systems
January 15, 2010, 12:00am PST
Network coding has been recently proposed as an efficient method to improve throughput, minimize delays and remove the need for reconciliation between network nodes in distributed streaming...
Provided by EPFL
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White Papers
Security Observance Throughout the Life-Cycle of Embedded Systems
May 16, 2008, 12:00am PDT
Embedded systems are an established part of life. Their security requirements underline the importance of properly formulated, implemented, and enforced security policies throughout their...
Provided by EPFL
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White Papers
Compromising Electromagnetic Emanations of Wired And Wireless Keyboards
June 1, 2009, 12:00am PDT
Computer keyboards are often used to transmit confidential data such as passwords. Since they contain electronic components, keyboards eventually emit electromagnetic waves. These emanations could...
Provided by EPFL
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White Papers
Building a Calculus of Data Structures
November 10, 2009, 12:00am PST
Techniques such as verification condition generation, predicate abstraction, and expressive type systems reduce software verification to proving formulas in expressive logics. Programs and their...
Provided by EPFL
-
White Papers
Cooperative Packet Forwarding in Multi-Domain Sensor Networks
January 1, 2011, 12:00am PST
Sensor networks are large scale networks of low-power devices that collaborate in order to perform a given task. The sensors are limited in battery energy, capacity and computational power. In...
Provided by EPFL
-
White Papers
SOWER: Self-Organizing Wireless Network for Messaging
January 1, 2011, 12:00am PST
Short Message Service (SMS) has become extremely popular in many countries, and represents a multi-billion dollars market. Yet, many consumers consider that the price cellular network operators...
Provided by EPFL
-
White Papers
Non-Cooperative Multi-Radio Channel Allocation in Wireless Networks
May 31, 2007, 12:00am PDT
Channel allocation was extensively studied in the framework of cellular networks. But the emergence of new system concepts, such as cognitive radio systems, has brought this topic into the focus...
Provided by EPFL
-
White Papers
TraNS: Realistic Joint Traffic and Network Simulator for VANETs
November 4, 2007, 12:00am PDT
Realistic simulation is a necessary tool for proper evaluation of newly developed protocols for Vehicular Ad Hoc NETworks (VANETs). Several recent efforts focused on achieving this goal. Yet, to...
Provided by EPFL
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Whitepapers
Network-Coded Multihop Multicast: Topology and Encoding Complexity
May 24, 2012, 12:00am PDT
In this paper, some novel results on the encoding complexity of network coding and its relation with the network topology are reported. The encoding complexity in network coding is defined as the...
Provided by EPFL
-
White Papers
Understanding and Tackling the Root Causes of Instability in Wireless Mesh Networks
December 21, 2010, 12:00am PST
The authors investigate, both theoretically and experimentally, the stability of CSMA-based wireless mesh networks, where a network is said to be stable if and only if the queue of each relay node...
Provided by EPFL
-
White Papers
A Practical Hand-on Guide for Deploying a Large-Scale Wireless Multi-Hop Network
November 30, 2010, 12:00am PST
The knowledge of how to exactly deploy a wireless multi-hop network can be of interest for both researchers and engineers. Engineers may be interested in the possibility of extending the coverage...
Provided by EPFL
-
White Papers
Understanding and Tackling the Root Causes of Instability in Wireless Mesh Networks: (Extended Version)
October 4, 2010, 12:00am PDT
The authors addressed the problem of network stability in CSMA-based linear wireless mesh network and provide three main contributions. First, they identified two key factors impacting the...
Provided by EPFL
-
White Papers
Effect of 802.11 Adaptive Exponential Backoffs on the Fluidity of Downlink Flows in Mesh Networks
February 20, 2008, 12:00am PST
Efficient multihop traffic management is a need for successful Wireless Mesh Networks (WMNs) deployment. Using an analogy with fluid mechanism, the authors classify a flow as laminar if the...
Provided by EPFL
-
White Papers
Joint Scheduling, Power Control and Routing in Symmetric, One-dimensional, Multi-Hop Wireless Networks
March 24, 2010, 12:00am PDT
The authors are interested in finding a jointly optimal scheduling, routing and power control that achieves max-min fair rate allocation in a multi-hop wireless network. This is a highly complex...
Provided by EPFL
-
White Papers
Spectrum Sharing Games of Infrastructure-Based Cognitive Radio Networks
September 1, 2008, 12:00am PDT
The IEEE 802.22 standard is the first proposed standard for the cognitive radio networks in which a set of Base Stations (BSs) make opportunistic spectrum access to provide wireless access to the...
Provided by EPFL
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White Papers
Concurrent and Parallel Transmissions Are Optimal for Low Data-Rate IR-UWB Networks
September 4, 2008, 12:00am PDT
The Internet of things, emerging pervasive and sensor networks are low data-rate wireless networks with, a priori, no specific topology and no fixed infrastructure. Their primary requirements are...
Provided by EPFL
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White Papers
Certificate Revocation List Distribution in Vehicular Communication Systems
July 3, 2011, 12:00am PDT
The need to evict compromised, faulty, or illegitimate nodes is well understood in prominent projects designing security architectures for Vehicular Communication (VC) systems. The basic approach...
Provided by EPFL
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White Papers
RRB-Trees: Efficient Immutable Vectors
October 31, 2011, 12:00am PDT
Immutable vectors are a convenient data structure for functional programming and part of the standard library of modern languages like Clojure and Scala. The common implementation is based on wide...
Provided by EPFL
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White Papers
A Generic Parallel Collection Framework
July 31, 2010, 12:00am PDT
Most applications manipulate structured data. Modern languages and platforms provide collection frameworks with basic data structures like lists, hash-tables and trees. These data structures come...
Provided by EPFL
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White Papers
Capabilities for Uniqueness and Borrowing
April 2, 2010, 12:00am PDT
An important application of unique object references is safe and efficient message passing in concurrent object-oriented programming. However, to prevent the ill effects of aliasing, practical...
Provided by EPFL
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White Papers
Deprecating the Observer Pattern
April 1, 2010, 12:00am PDT
Programming interactive systems by means of the observer pattern is hard and error-prone yet is still the implementation standard in many production environments. The authors present an approach...
Provided by EPFL
-
White Papers
Concurrent Programming Paradigms, a Comparison in Scala
May 5, 2009, 12:00am PDT
There is a rapid rise of multi-cores in recent hardware architectures. To exploit computational power of multi-core architectures, software should shift to be as concurrent as possible; and...
Provided by EPFL
-
Whitepapers
Network-Coded Multihop Multicast: Topology and Encoding Complexity
May 24, 2012, 12:00am PDT
In this paper, some novel results on the encoding complexity of network coding and its relation with the network topology are reported. The encoding complexity in network coding is defined as the...
Provided by EPFL
-
Whitepapers
Expected Loss Bounds for Authentication in Constrained Channels
December 2, 2011, 12:00am PST
The authors derive bounds on the expected loss for authentication protocols in channels which are constrained due to noisy conditions and communication costs. This is motivated by a number of...
Provided by EPFL
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Whitepapers
The Cicada Attack: Degradation and Denial of Service in IR Ranging
October 28, 2010, 12:00am PDT
The authors explain that an interferer with malicious intentions can significantly degrade the performance of Impulse-Radio (IR) ranging. The cicada attack they have developed can decrease the...
Provided by EPFL
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White Papers
Achieving Maximal Path Diversity in Low-Delay Application-Level Multicast
August 13, 2009, 12:00am PDT
Given the stringent delay requirements and capacity constraints of the interactive ALM, it is (usually) still possible to create a system with a high path diversity at both the overlay and the IP...
Provided by EPFL
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White Papers
Walking in Facebook: A Case Study of Unbiased Sampling of OSNs
December 15, 2009, 12:00am PST
With more than 250 million active users, FaceBook (FB) is currently one of the most important online social networks. The authors' goal in this paper is to obtain a representative (unbiased)...
Provided by EPFL
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White Papers
On-Demand Recovery in Middleware Storage Systems
August 11, 2010, 12:00am PDT
This paper presents a recovery architecture for in-memory data management systems. Recovery in such systems boils down to solving two problems: retrieving and installing the last committed image...
Provided by EPFL
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White Papers
Comfusy: A Tool for Complete Functional Synthesis Tool Presentation
May 11, 2010, 12:00am PDT
Synthesis of program fragments from specifications can make programs easier to write and easier to reason about. The authors present Comfusy, a tool that extends the compiler for the...
Provided by EPFL
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White Papers
MUNCH - Automated Reasoner for Sets and Multisets
April 19, 2010, 12:00am PDT
This system description provides an overview of the MUNCH reasoner for sets and multisets. MUNCH takes as the input a formula in a logic that supports expressions about sets, multi-sets, and...
Provided by EPFL
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White Papers
On Using Static Analysis to Detect Type Errors in PHP Applications
April 8, 2010, 12:00am PDT
The authors describe their experience in using abstract interpretation to analyze applications written in PHP. Their work focuses on reconstructing type information from mostly un-annotated code....
Provided by EPFL
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White Papers
Lightweight Polymorphic Effects
March 29, 2012, 12:00am PDT
Type-and-effect systems are a well-studied approach for reasoning about the computational behavior of programs. Nevertheless, there is only one example of an effect system that has been adopted in...
Provided by EPFL
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White Papers
CCNoC: On-Chip Interconnects for Cache-Coherent Manycore Server Chips
May 22, 2010, 12:00am PDT
Many-core chips are emerging as the architecture of choice to provide power-scalability and improve performance while riding the Moore's law. On-chip interconnects are increasingly playing a...
Provided by EPFL
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White Papers
Ron Was Wrong, Whit Is Right
February 17, 2012, 12:00am PST
The authors performed a sanity check of public keys collected on the web. Their main goal was to test the validity of the assumption that different random choices are made each time keys are...
Provided by EPFL
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White Papers
ECM at Work
February 23, 2012, 12:00am PST
The performance of the Elliptic Curve Method (ECM) for integer factorization plays an important role in the security assessment of RSA-based protocols as a co-factorization tool inside the number...
Provided by EPFL
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White Papers
Implementing Joins Using Extensible Pattern Matching
December 14, 2007, 12:00am PST
Join patterns are an attractive declarative way to synchronize both threads and asynchronous distributed computations. The authors explore joins in the context of extensible pattern matching that...
Provided by EPFL
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White Papers
Neighbor Discovery With Reception Status Feedback to Transmitters
December 16, 2009, 12:00am PST
Neighbor discovery is essential for the process of self-organization of a wireless network, where almost all routing and medium access protocols need knowledge of one-hop neighbors. In this paper,...
Provided by EPFL
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White Papers
Lightweight Language Support for Type-Based, Concurrent Event Processing
March 15, 2010, 12:00am PDT
Many concurrent applications are structured around type-based event handling. Scala provides a library for event-based actors, which allows common idioms to be expressed in a concise and intuitive...
Provided by EPFL
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White Papers
Tool Demo: Scala-Virtualized
October 17, 2011, 12:00am PDT
This paper describes Scala-Virtualized, which extends the Scala language and compiler with a small number of features that enable combining the benefits of shallow and deep embeddings of DSLs. The...
Provided by EPFL
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White Papers
Building-Blocks for Performance Oriented DSLs
August 3, 2011, 12:00am PDT
Domain-specific languages raise the level of abstraction in software development. While it is evident that programmers can more easily reason about very high-level programs, the same holds for...
Provided by EPFL
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White Papers
Towards Privacy-Friendly Online Advertising
April 30, 2009, 12:00am PDT
Modern web sites commonly interact with third-party domains to integrate advertisements and generate revenue from them. To improve the relevance of advertisements, online advertisers track user...
Provided by EPFL
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White Papers
Tools and Frameworks for Big Learning in Scala: Leveraging the Language for High Productivity and Performance
November 7, 2011, 12:00am PST
There is a lot of activity on leveraging Scala's expressiveness and ecosystem for large-scale learning tasks. This paper introduces three projects that are conducted in the context of the Scala...
Provided by EPFL
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White Papers
Matching Objects With Patterns
August 4, 2007, 12:00am PDT
Data in object-oriented programming is organized in a hierarchy of classes. The problem of object-oriented pattern matching is how to explore this hierarchy from the outside. This usually involves...
Provided by EPFL
-
White Papers
Concurrent Programming Paradigms, a Comparison in Scala
May 5, 2009, 12:00am PDT
There is a rapid rise of multi-cores in recent hardware architectures. To exploit computational power of multi-core architectures, software should shift to be as concurrent as possible; and...
Provided by EPFL
-
White Papers
Deprecating the Observer Pattern
April 1, 2010, 12:00am PDT
Programming interactive systems by means of the observer pattern is hard and error-prone yet is still the implementation standard in many production environments. The authors present an approach...
Provided by EPFL
-
White Papers
Capabilities for Uniqueness and Borrowing
April 2, 2010, 12:00am PDT
An important application of unique object references is safe and efficient message passing in concurrent object-oriented programming. However, to prevent the ill effects of aliasing, practical...
Provided by EPFL
-
White Papers
A Generic Parallel Collection Framework
July 31, 2010, 12:00am PDT
Most applications manipulate structured data. Modern languages and platforms provide collection frameworks with basic data structures like lists, hash-tables and trees. These data structures come...
Provided by EPFL
-
White Papers
RRB-Trees: Efficient Immutable Vectors
October 31, 2011, 12:00am PDT
Immutable vectors are a convenient data structure for functional programming and part of the standard library of modern languages like Clojure and Scala. The common implementation is based on wide...
Provided by EPFL
-
White Papers
Certificate Revocation List Distribution in Vehicular Communication Systems
July 3, 2011, 12:00am PDT
The need to evict compromised, faulty, or illegitimate nodes is well understood in prominent projects designing security architectures for Vehicular Communication (VC) systems. The basic approach...
Provided by EPFL
-
White Papers
Concurrent and Parallel Transmissions Are Optimal for Low Data-Rate IR-UWB Networks
September 4, 2008, 12:00am PDT
The Internet of things, emerging pervasive and sensor networks are low data-rate wireless networks with, a priori, no specific topology and no fixed infrastructure. Their primary requirements are...
Provided by EPFL
-
White Papers
Spectrum Sharing Games of Infrastructure-Based Cognitive Radio Networks
September 1, 2008, 12:00am PDT
The IEEE 802.22 standard is the first proposed standard for the cognitive radio networks in which a set of Base Stations (BSs) make opportunistic spectrum access to provide wireless access to the...
Provided by EPFL
-
White Papers
Joint Scheduling, Power Control and Routing in Symmetric, One-dimensional, Multi-Hop Wireless Networks
March 24, 2010, 12:00am PDT
The authors are interested in finding a jointly optimal scheduling, routing and power control that achieves max-min fair rate allocation in a multi-hop wireless network. This is a highly complex...
Provided by EPFL
-
White Papers
Effect of 802.11 Adaptive Exponential Backoffs on the Fluidity of Downlink Flows in Mesh Networks
February 20, 2008, 12:00am PST
Efficient multihop traffic management is a need for successful Wireless Mesh Networks (WMNs) deployment. Using an analogy with fluid mechanism, the authors classify a flow as laminar if the...
Provided by EPFL
-
White Papers
Understanding and Tackling the Root Causes of Instability in Wireless Mesh Networks: (Extended Version)
October 4, 2010, 12:00am PDT
The authors addressed the problem of network stability in CSMA-based linear wireless mesh network and provide three main contributions. First, they identified two key factors impacting the...
Provided by EPFL
-
White Papers
A Practical Hand-on Guide for Deploying a Large-Scale Wireless Multi-Hop Network
November 30, 2010, 12:00am PST
The knowledge of how to exactly deploy a wireless multi-hop network can be of interest for both researchers and engineers. Engineers may be interested in the possibility of extending the coverage...
Provided by EPFL
-
White Papers
Understanding and Tackling the Root Causes of Instability in Wireless Mesh Networks
December 21, 2010, 12:00am PST
The authors investigate, both theoretically and experimentally, the stability of CSMA-based wireless mesh networks, where a network is said to be stable if and only if the queue of each relay node...
Provided by EPFL
-
White Papers
TraNS: Realistic Joint Traffic and Network Simulator for VANETs
November 4, 2007, 12:00am PDT
Realistic simulation is a necessary tool for proper evaluation of newly developed protocols for Vehicular Ad Hoc NETworks (VANETs). Several recent efforts focused on achieving this goal. Yet, to...
Provided by EPFL
-
White Papers
Non-Cooperative Multi-Radio Channel Allocation in Wireless Networks
May 31, 2007, 12:00am PDT
Channel allocation was extensively studied in the framework of cellular networks. But the emergence of new system concepts, such as cognitive radio systems, has brought this topic into the focus...
Provided by EPFL
-
White Papers
SOWER: Self-Organizing Wireless Network for Messaging
January 1, 2011, 12:00am PST
Short Message Service (SMS) has become extremely popular in many countries, and represents a multi-billion dollars market. Yet, many consumers consider that the price cellular network operators...
Provided by EPFL
-
White Papers
Cooperative Packet Forwarding in Multi-Domain Sensor Networks
January 1, 2011, 12:00am PST
Sensor networks are large scale networks of low-power devices that collaborate in order to perform a given task. The sensors are limited in battery energy, capacity and computational power. In...
Provided by EPFL
-
White Papers
Building a Calculus of Data Structures
November 10, 2009, 12:00am PST
Techniques such as verification condition generation, predicate abstraction, and expressive type systems reduce software verification to proving formulas in expressive logics. Programs and their...
Provided by EPFL
-
White Papers
Compromising Electromagnetic Emanations of Wired And Wireless Keyboards
June 1, 2009, 12:00am PDT
Computer keyboards are often used to transmit confidential data such as passwords. Since they contain electronic components, keyboards eventually emit electromagnetic waves. These emanations could...
Provided by EPFL
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