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mobile and wireless
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Mission Statement
TechRepublic's ITPapers is the Web's largest library of free technical IT white papers, webcasts, and case studies. Covering IT categories including Data Management, IT Management, Networking, Communications, Enterprise Applications, Storage, Security and much more, TechRepublic's White Paper Directory is the best source for technical white papers and IT information.
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White Papers
Tracing Real Time Location of a Friend in Mobile System
Mar 2012
The application of this project is to track a number of people even in crowded natural environments. A system of this sort would be useful in a number of applications, such as human-computer...
Provided by Engg Journals Publications
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White Papers
Comparison and Study of AOMDV and DSDV Routing Protocols in MANET Using NS-2
Mar 2012
A Mobile Ad hoc NETwork (MANET) is a collection of wireless mobile nodes communicating with each other using multi-hop wireless. One of the main challenges of MANET is the design of robust routing...
Provided by Engg Journals Publications
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White Papers
Optimization of Rectangular Microstrip Antenna Using Radial Basis Function Neural Network
Mar 2012
The mobile communication systems usually require a portable wireless antenna size in order to meet as requirement of mobile units. Microstrip patch antenna is one of the best suitable antennas for...
Provided by Engg Journals Publications
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White Papers
Cluster Level Optimization of Residual Energy Consumption in Wireless Sensor Networks for Lifetime Enhancement
Feb 2012
Network lifetime is perhaps the most important metric for the evaluation of sensor networks. In a resource-constrained environment, the consumption of every limited resource must be considered The...
Provided by Engg Journals Publications
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White Papers
Performance Evaluation of Reactive, Proactive and Hybrid Routing Protocols in MANET
Feb 2012
This Mobile Ad hoc NETworks (MANET) is a set of wireless mobile nodes dynamically form spontaneous network which works without centralized administration. Due to this characteristic, there are...
Provided by Engg Journals Publications
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White Papers
Cooperative Communications: A New Trend in the Wireless World
Feb 2012
This Wireless channel while offering independence of movement also introduces un-reliability in the messages received at the destination. Various strategies have been introduced so far to mitigate...
Provided by Engg Journals Publications
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White Papers
An Efficient Approach for Routing in Wireless Ad Hoc Network Using Artificial Intelligence
Feb 2012
MANETs are the set of small, low infrastructure communication setup that operates by consuming the energy of batteries. Thus, it is very much important for MANETs to perform efficiently. For...
Provided by Engg Journals Publications
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White Papers
Space Frequency Coded OFDM
Apr 2012
The authors are going to implement and study a space frequency coded OFDM system which consists of two transmitters and a single receiver. Simple Alamouti spacetime code is used. An M-ary PSK...
Provided by International Journal of Scientific Engineering and Technology
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White Papers
RFID (Radio Frequency IDentification) Growth in Daily Life
Apr 2012
There are three general methods to identify and track assets: paper and pencil or similar manual record keeping techniques; bar code techniques using printed paper or plastic labels with laser...
Provided by International Journal of Scientific Engineering and Technology
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White Papers
An Effect of Route Caching Scheme in DSR for Vehicular Adhoc Networks
Jan 2012
Routing is one of the most significant challenges in Vehicular ad hoc networks and is critical for the basic network operations. Nodes (vehicles) in a Vehicular ad hoc network are allowed to move...
Provided by Engg Journals Publications
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White Papers
A Probabilistic Approach of Coverage Prediction in Mobile Ad Hoc Networks
Dec 2011
A fundamental issue arising in Mobile Ad-hoc NETworks (MANETs) is the selection of the optimal path between any two nodes. It's very difficult to select of optimal path due to different factors...
Provided by Engg Journals Publications
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White Papers
Personalised Subscription Pricing for Optimised Wireless Mesh Network Deployment
Mar 2008
Wireless Mesh Networks (WMN) represent semi-infrastructured ad hoc networks, where nodes act as both access points and routers. Wireless links between nodes are used to relay communication to a...
Provided by Reed Elsevier
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White Papers
Connected K-Target Coverage Problem in Wireless Sensor Networks With Different Observation Scenarios
Apr 2008
In this paper, the authors consider the problem of scheduling sensor activities to maximize network lifetime while maintaining both discrete K-target coverage and network connectivity. In K-target...
Provided by Reed Elsevier
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White Papers
Traffic and Energy Consumption of an IEEE 802.15.4 Network in the Presence of Authenticated, ECC Diffie - Hellman Ephemeral Key Exchange
Apr 2008
In this paper, the authors have modeled traffic and energy consumption in a secured, power managed wireless sensor network implemented using IEEE 802.15.4 technology. The network is secured...
Provided by Reed Elsevier
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White Papers
Joint Transmit Power and Physical Carrier Sensing Adaptation Based on Loss Differentiation for High Density IEEE 802.11 WLAN
Mar 2008
In High Density (HD) IEEE 802.11 WLAN, packet loss can occur due to co-channel interference (asynchronous interference) or collisions (synchronous interference). In order to effectively mitigate...
Provided by Reed Elsevier
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White Papers
Multihop Cellular Networks: Technology and Economics
Mar 2008
Recently, Multi-hop Cellular Networks (MCNs) were proposed to preserve the advantages of traditional single-hop cellular networks with multi-hop ad hoc relaying networks, while minimizing the...
Provided by Reed Elsevier
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White Papers
Tapping Into the Fountain of CPUs - On Operating System Support for Programmable Devices
Mar 2008
The constant race for faster and more powerful CPUs is drawing to a close. No longer is it feasible to significantly increase the speed of the CPU without paying a crushing penalty in power...
Provided by Association for Computing Machinery
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White Papers
Successive Maximization for Systematic Design of Universally Capacity Approaching Rate-Compatible Sequences of LDPC Code Ensembles Over Binary-Input Output-Symmetric Memoryless Channels
Jul 2011
A systematic construction of capacity achieving Low-Density Parity Check (LDPC) code ensemble sequences over the Binary Erasure Channel (BEC) has been proposed by Saeedi et al. based on a method,...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
The Effect of IntelliDrive on the Efficiency of Highway Transportation Systems
Dec 2010
Recently, the IntelliDrive initiative has been proposed by the US Department Of Transportation (USDOT) to enhance on-road safety and efficiency. In this paper, the authors provide a mathematical...
Provided by Hindawi Publishing
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White Papers
Hybrid Channel Codes for Efficient FSO/RF Communication Systems
Oct 2010
Conventional hybrid RF and optical wireless communication systems make use of parallel Free Space Optical (FSO) and Radio Frequency (RF) channels to achieve higher reliability than individual...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Connectivity Properties of Large-Scale Sensor Networks
Apr 2009
In wireless sensor networks, both nodes and links are prone to failures. In this paper, the authors study connectivity properties of large-scale wireless sensor networks and discuss their implicit...
Provided by Springer Science+Business Media
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White Papers
Results on Punctured Low-Density Parity-Check Codes and Improved Iterative Decoding Techniques
Dec 2008
The authors study some coding schemes using Low-Density Parity-Check (LDPC) codes. They specifically concentrate on improved decoding methods and rate-compatible LDPC codes. One of the most...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Unequal Error Protection Using Partially Regular LDPC Codes
Jul 2010
In this paper, the authors propose a scheme to construct Low-Density Parity-Check (LDPC) codes that are suitable for Unequal Error Protection (UEP). They derive Density Evolution (DE) formulas for...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
On Bit Error Rate Performance of Polar Codes in Finite Regime
Oct 2010
Polar codes have been recently proposed as the first low complexity class of codes that can provably achieve the capacity of symmetric binary-input memoryless channels. Here, the authors study the...
Provided by University of Massachusetts
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White Papers
Coverage and Adaptive Scheduling Algorithms for Criticality Management on Video Wireless Sensor Networks
Aug 2009
In WSN-based surveillance systems power conservation is an important issue but one must also ensure that the application's objectives are met. In this paper, the authors jointly address the...
Provided by Universite de Pau et des Pays de l'Adour
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White Papers
A Congestion Control Framework for Handling Video Surveillance Traffics on WSN
Jul 2009
This paper focuses on congestion control but while previous works considered scalar sensor nodes which only report events in the size of a few bytes, the authors are addressing congestion control...
Provided by CNRS
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White Papers
Soft-Decision Metrics for Coded Orthogonal Signaling in Symmetric Alpha-Stable Noise
Jan 2008
This paper derives new soft-decision metrics for coded orthogonal signaling in impulsive noise. For the case of a known channel amplitude and known noise dispersion, exact metrics are derived both...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Rapidly-Deployable Mesh Network Testbed
Oct 2009
This paper describes a wireless mesh network test-bed for research in rapid deployment and auto-configuration of mesh nodes. Motivated by the needs of first responders and military personnel...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver
Dec 2008
This paper proposes a simple non-coherent amplify-and-forward receiver for the relay channel and evaluates its diversity performance for Rayleigh fading channels. The authors use the generalized...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Quantize-and-Forward Relaying With M-Ary Phase Shift Keying
Feb 2008
Using cooperative transmission, two or more single-antenna users can share their antennas to achieve spatial diversity in a slow fading channel. One relaying protocol that achieves diversity,...
Provided by National Institute of Standards and Technology
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White Papers
Software Based MIMO Channel Emulator
Dec 2010
Fox is a software based channel emulator that models a wireless channel with up to 4x4 MIMO paths. While currently supporting 802.11n channel models, Fox can be extended to incorporate other...
Provided by Wireless Innovation Forum
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White Papers
SMALL: A Strategy-Proof Mechanism for Radio Spectrum Allocation
Mar 2011
With the growing deployment of wireless communication technologies, radio spectrum is becoming a scarce resource. Thus mechanisms to efficiently allocate the available spectrum are of interest. In...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Open or Close: On the Sharing of Femtocells
Mar 2011
The femtocell is an enabling technology to handle exponentially increasing wireless data traffic. Despite extensive attentions paid to resource control, e.g., power control and load balancing in...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Group Registration With Distributed Databases for Location Tracking in 3G Wireless Networks
Feb 2008
The increase of subscribers in wireless networks has led to the need for efficient location tracking strategies. Location tracking is used to keep track of a Mobile Terminal (MT). The network...
Provided by Reed Elsevier
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White Papers
A Link Layer Adaptive Pacing Scheme for Improving Throughput of Transport Protocols in Wireless Mesh Networks
Feb 2008
In this paper, the authors study the performance of a static multi-hop wireless network, specifically that of the backhaul network of a two-tier Wireless Mesh Network (WMN) operating on IEEE...
Provided by Reed Elsevier
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White Papers
SAM-MAC: An Efficient Channel Assignment Scheme for Multi-Channel Ad Hoc Networks
Feb 2008
Using multi-channel MAC protocols in Mobile Ad hoc NETworks (MANETs) is a promising way to improve the throughput performance. Channel assignment, which directly determines the efficiency of the...
Provided by Reed Elsevier
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White Papers
Practical Large-Scale Latency Estimation
Jan 2008
The authors present the implementation of a large-scale latency estimation system based on GNP and incorporated into the Google content delivery network. Their implementation employs standard...
Provided by Reed Elsevier
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White Papers
Stability - Throughput Tradeoff and Routing in Multi-Hop Wireless Ad Hoc Networks
Feb 2008
The authors study the throughput of multi-hop routes and stability of forwarding queues in a wireless ad-hoc network with random access channel. They focus on a wireless network with static nodes,...
Provided by Reed Elsevier
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White Papers
Approximate Analysis of LRU in the Case of Short Term Correlations
Jan 2008
One of the most widely considered cache replacement policies is Least Recently Used (LRU) based on which many other policies have been developed. LRU has been studied analytically in the...
Provided by Reed Elsevier
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White Papers
Performance Analysis of Scheduling and Interference Coordination Policies for OFDMA Networks
Jan 2008
In orthogonal frequency division multiple access systems there is an intimate relationship between the packet scheduler and the Inter-Cell Interference Coordination (ICIC) functionalities: they...
Provided by Reed Elsevier
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White Papers
Improving Spectral and Temporal Efficiency of Collocated IEEE 802.15.4 LR-WPANs
May 2009
The number of frequency channels specified for IEEE 802.15.4 Low-Rate Wireless Personal Area Networks (LR-WPANs) does not suffice to operate a variety of collocated WPAN applications that the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
S-ARQ: A New Truncated ARQ for IP-Based Wireless Network
Feb 2010
Automatic Repeat reQuest (ARQ) is a very effective technique against transmission error at the Medium Access Control (MAC) layer. An erroneous MAC Protocol Data Unit (MPDU) can be typically...
Provided by Seoul National University
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White Papers
Idle Mode for Deep Power Save in IEEE 802.11 WLANs
Feb 2010
Along with the wide acceptance of IEEE 802.11 Wireless Local Area Network (WLAN), new applications such as Internet Protocol (IP) telephony over WLAN are fast emerging today. For battery-powered...
Provided by Seoul National University
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White Papers
Performance Analysis of IEEE 802.16m Sleep Mode for Heterogeneous Traffic
May 2010
The authors numerically analyze the performance of the emerging 802.16m's sleep mode operation in order to gain a new insight regarding its power consumption and traffic transmission delay when a...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Performance Analysis of Block ACK Scheme for IEEE 802.11e Networks
Apr 2010
The demand for the IEEE 802.11 Wireless Local-Area Networks (WLANs) has been drastically increasing along with many emerging applications and services over WLAN. However, the IEEE 802.11 Medium...
Provided by Reed Elsevier
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White Papers
Resolving Intra-Class Unfairness in 802.11 EDCA
Sep 2010
The de facto quality-of-service provisioning mechanism for wireless LANs is the Enhanced Distributed Channel Access (EDCA), which provides enhanced service differentiation based on four different...
Provided by Springer Science+Business Media
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White Papers
Adaptive Sleep Mode Management in IEEE 802.16m Wireless Metropolitan Area Networks
Mar 2011
The emerging IEEE 802.16m standard provides a new sleep mode operation for Mobile Stations (MSs). It evolves from the sleep mode operation in the IEEE 802.16 standard but with more advanced...
Provided by Reed Elsevier
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White Papers
A Game Theoretical Approach to Clustering of Ad-Hoc and Sensor Networks
Jul 2009
Game theory has been used for decades in fields of science such as economics and biology, but recently it was used to model routing and packet forwarding in wireless ad-hoc and sensor networks....
Provided by Aristotle University of Thessaloniki
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White Papers
SYNAPSE: A Network Reprogramming Protocol for Wireless Sensor Networks Using Fountain Codes
Sep 2009
Wireless reprogramming is a key functionality in Wireless Sensor Networks (WSNs). In fact, the requirements for the network may change in time, or new parameters might have to be loaded to change...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
VPAL: Video Packet Adaptation Layer for Reliable Video Multicast Over IEEE 802.11n WLAN
Jun 2010
In this paper, the authors propose a scheme, called Video Packet Adaptation Layer (VPAL), for reliable video multicast over the IEEE 802.11n WLAN. VPAL is composed of raptor coding for reliable...
Provided by Reed Elsevier
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White Papers
Efficient Target Tracking Through Binary-Detection in Sparsely Deployed WSN
Apr 2011
The problem of tracking moving objects with help of Wireless Sensor Network (WSN) has been studied in past. Most of the solutions rely on the use of specialized and expensive sensors, and on dense...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Error-Resilient Image Transmission Over Multihop Wireless Networks
Apr 2011
Guarding against channel errors in wireless networks has been a challenging research problem, especially when transmitting time-constrained contents, like streaming video or image. Source...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Modified SPIN for Wireless Sensor Networks
Apr 2011
Data transmission is one of the major challenges in Wireless Sensor Network (WSN). Different routing protocols have been proposed to save energy during data transmission in WSN. Routing protocols...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Got Traffic? an Evaluation of Click Traffic Providers
Mar 2011
Internet advertising has been a highly profitable means by which companies and organizations can pay to attract visitors to their web sites. Over time, satisfying the demand for this service has...
Provided by Association for Computing Machinery
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White Papers
On the Empirical Performance of Self-Calibrating WiFi Location Systems
Jul 2011
The pervasive deployment of 802.11 in modern enterprise buildings has long made it an attractive technology for constructing indoor location services. To this end, a broad range of algorithms have...
Provided by UC Regents
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White Papers
Handling High Mobility in Next-Generation Wireless Ad Hoc Networks
Jul 2009
Next-generation ad hoc networks need to be able to handle high mobility in order to support a wide range of emerging applications such as vehicular networks. Maintaining communication links of an...
Provided by John Wiley & Sons
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White Papers
Efficient and Scalable Merging Algorithms for Wireless Traces
Aug 2009
Analysis of wireless experimentation results is a complex task to achieve. As multiple probes are needed in order to get a global view of a wireless experimentation, the resulting packet traces...
Provided by INRIA
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White Papers
Distributed Detection of Clone Attacks in Wireless Sensor Networks
Jul 2010
Wireless Sensor Networks (WSNs) are often deployed in hostile environments where an adversary can physically capture some of the nodes, first re-program and then replicate them in a large number...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Developing Wireless Sensor Network Applications in a Virtual Environment
Jan 2010
The authors describe their "Holistic" platform for developing wireless ad hoc sensor networks and focus on its most representative and essential virtualization component: VUE2 (the Virtual...
Provided by Springer Science+Business Media
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White Papers
Optimizing Cognitive Ad-Hoc Wireless Networks for Green Communications
Jan 2011
This paper investigates the potential of smart routing in minimization of radio environment pollution in cognitive ad-hoc wireless networks. A wireless ad-hoc sensor network based on the IEEE...
Provided by University of Zagreb
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White Papers
Cost-Benefit Aware Routing Protocol for Wireless Sensor Networks With Hybrid Energy Storage System
Jan 2011
At the eve of a new decade, when energy concerns are at the top of the research priorities, this paper presents a new cost-benefit function for Wireless Sensor Networks (WSNs) powered by...
Provided by Universidade da Beira Interior
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White Papers
Patient Vital Signs Monitoring Using Wireless Body Area Networks
Feb 2010
Today hospitals are equipped with many electronic transmitting devices, which results in electromagnetic interference that may impair wireless transmissions between medical devices. On the other...
Provided by Rutgers University
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White Papers
Bio-Inspired Communications for Coordination Among Autonomous Underwater Vehicles
Mar 2010
To take measurements in space and time from the undersampled vast ocean, it is necessary to employ multiple autonomous underwater vehicles, such as gliders, that communicate and coordinate with...
Provided by Rutgers University
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White Papers
A Testbed for Performance Evaluation of Underwater Vehicle Team Formation and Steering Algorithms
Jun 2010
Underwater testbeds are key tools for performance evaluation of underwater communication and coordination algorithms to enable swarming of autonomous vehicles. The authors describe a demonstration...
Provided by Rutgers University
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White Papers
Demo Abstract: Performance Evaluation of Underwater Vehicle Coordination Algorithms Through Emulation
Oct 2010
In recent years, UnderWater Acoustic Sensor Networks (UW-ASNs) have been deployed to study dynamic oceanographic phenomena such as variations of salinity and temperature, and phytoplankton growth...
Provided by Association for Computing Machinery
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White Papers
On the Impact of Neighborhood Discovery on Geographical Routing in Wireless Sensor Networks
Apr 2011
In Wireless Sensor Networks (WSNs), sensing nodes operate in dynamic environments resulting in neighboring nodes being discovered or lost at any moment causing the network topology to change...
Provided by Rutgers University
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White Papers
SILENCE: Distributed Adaptive Sampling for Sensor-Based Autonomic Systems
Jun 2011
Adaptive sampling and sleep scheduling can help realize the much needed resource efficiency in densely deployed autonomic sensor-based systems that monitor and reconstruct physical or...
Provided by Association for Computing Machinery
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White Papers
QUO VADIS: QoS-Aware Underwater Optimization Framework for Inter-Vehicle Communication Using Acoustic Directional Transducers
Jul 2011
Underwater acoustic communications consume a significant amount of energy due to the high transmission power (10 - 50 W) and long data packet transmission times (0.1 - 1 s). Mobile Autonomous...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Overlay/Underlay Routing Issues in Wireless Mesh Networks
Jan 2011
Recent analyses of the network traffic show that an ever growing portion of it is generated by user communities that share their own resources in a peer-to-peer fashion. Internet Service...
Provided by University of Naples
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White Papers
A Demand-Assignment Algorithm Based on a Markov Modulated Chain Prediction Model for Satellite Bandwidth Allocation
Feb 2008
This paper deals with the problem of the design of a control-based demand-assignment algorithm for a satellite access network using a Markov modulated chain traffic prediction model. The objective...
Provided by Springer Science+Business Media
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White Papers
Handling Mobility in Wireless Sensor and Actor Networks
Feb 2010
In Wireless Sensor and Actor Networks (WSANs), the collaborative operation of sensors enables the distributed sensing of a physical phenomenon, while actors collect and process sensor data and...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Task Allocation for Networked Autonomous Underwater Vehicles in Critical Missions
Jun 2010
UnderWater Acoustic Sensor Networks (UW-ASNs) consist of stationary or mobile nodes such as Autonomous Underwater Vehicles (AUVs), which may be classified as propeller-driven vehicles and gliders...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Transmission of Patient Vital Signs Using Wireless Body Area Networks
Jul 2010
Triage is the process of prioritizing patients based on the severity of their condition when resources are insufficient. Hospitals today are equipped with more and more electronic medical devices....
Provided by Springer Science+Business Media
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White Papers
A Prototyping System for Mobile Devices
Aug 2007
The paper discusses an FPGA-based prototyping system with both wired and wireless programming and data exchange facilities. The system can be efficiently used for different types of portable...
Provided by Association for Computing Machinery
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White Papers
Distributed Routing Algorithms for Underwater Acoustic Sensor Networks
Sep 2010
Underwater Acoustic Sensor Networks (UW-ASNs) consist of devices with sensing, processing, and communication capabilities that are deployed underwater to perform collaborative monitoring tasks to...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Multimedia Cross-Layer Protocol for Underwater Acoustic Sensor Networks
Sep 2010
Underwater multimedia acoustic sensor networks will enable new underwater applications such as multimedia coastal and tactical surveillance, undersea explorations, picture and video acquisition...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
From Cloud Computing to Mobile Internet, From User Focus to Culture and Hedonism The Crucible of Mobile Health Care and Wellness Applications
Nov 2010
With the rise of mobile Internet and cloud computing new ubiquitous medical services will emerge coinciding with changes in demographics and social structures. Mobile e-health and wellness...
Provided by Aachen University
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White Papers
Resource Discovery and Request-Redirection for Dynamic Load Sharing in Multi-Provider Peering Content Delivery Networks
Mar 2009
A constellation of Content Delivery Networks (CDNs), termed as peering CDNs, endeavors to guarantee adequate delivery performance when the incoming request load is overwhelming for a single...
Provided by University of Melbourne
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White Papers
xShare: Supporting Impromptu Sharing of Mobile Phones
Jun 2009
Loaded with personal data, e.g. photos, contacts, and call history, mobile phones are truly personal devices. Yet it is often necessary or desirable to share the phones with others. This is...
Provided by Association for Computing Machinery
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White Papers
Reputation-Based Dependable Scheduling of Workflow Applications in Peer-to-Peer Grids
Jul 2010
Grids facilitate creation of wide-area collaborative environment for sharing computing or storage resources and various applications. Inter-connecting distributed Grid sites through peer-to-peer...
Provided by Reed Elsevier
-
White Papers
Personalised Subscription Pricing for Optimised Wireless Mesh Network Deployment
Mar 2008
Wireless Mesh Networks (WMN) represent semi-infrastructured ad hoc networks, where nodes act as both access points and routers. Wireless links between nodes are used to relay communication to a...
Provided by Reed Elsevier
-
White Papers
Connected K-Target Coverage Problem in Wireless Sensor Networks With Different Observation Scenarios
Apr 2008
In this paper, the authors consider the problem of scheduling sensor activities to maximize network lifetime while maintaining both discrete K-target coverage and network connectivity. In K-target...
Provided by Reed Elsevier
-
White Papers
Traffic and Energy Consumption of an IEEE 802.15.4 Network in the Presence of Authenticated, ECC Diffie - Hellman Ephemeral Key Exchange
Apr 2008
In this paper, the authors have modeled traffic and energy consumption in a secured, power managed wireless sensor network implemented using IEEE 802.15.4 technology. The network is secured...
Provided by Reed Elsevier
-
White Papers
Joint Transmit Power and Physical Carrier Sensing Adaptation Based on Loss Differentiation for High Density IEEE 802.11 WLAN
Mar 2008
In High Density (HD) IEEE 802.11 WLAN, packet loss can occur due to co-channel interference (asynchronous interference) or collisions (synchronous interference). In order to effectively mitigate...
Provided by Reed Elsevier
-
White Papers
Multihop Cellular Networks: Technology and Economics
Mar 2008
Recently, Multi-hop Cellular Networks (MCNs) were proposed to preserve the advantages of traditional single-hop cellular networks with multi-hop ad hoc relaying networks, while minimizing the...
Provided by Reed Elsevier
-
White Papers
Tapping Into the Fountain of CPUs - On Operating System Support for Programmable Devices
Mar 2008
The constant race for faster and more powerful CPUs is drawing to a close. No longer is it feasible to significantly increase the speed of the CPU without paying a crushing penalty in power...
Provided by Association for Computing Machinery
-
White Papers
Successive Maximization for Systematic Design of Universally Capacity Approaching Rate-Compatible Sequences of LDPC Code Ensembles Over Binary-Input Output-Symmetric Memoryless Channels
Jul 2011
A systematic construction of capacity achieving Low-Density Parity Check (LDPC) code ensemble sequences over the Binary Erasure Channel (BEC) has been proposed by Saeedi et al. based on a method,...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
The Effect of IntelliDrive on the Efficiency of Highway Transportation Systems
Dec 2010
Recently, the IntelliDrive initiative has been proposed by the US Department Of Transportation (USDOT) to enhance on-road safety and efficiency. In this paper, the authors provide a mathematical...
Provided by Hindawi Publishing
-
White Papers
Hybrid Channel Codes for Efficient FSO/RF Communication Systems
Oct 2010
Conventional hybrid RF and optical wireless communication systems make use of parallel Free Space Optical (FSO) and Radio Frequency (RF) channels to achieve higher reliability than individual...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Connectivity Properties of Large-Scale Sensor Networks
Apr 2009
In wireless sensor networks, both nodes and links are prone to failures. In this paper, the authors study connectivity properties of large-scale wireless sensor networks and discuss their implicit...
Provided by Springer Science+Business Media
-
White Papers
Results on Punctured Low-Density Parity-Check Codes and Improved Iterative Decoding Techniques
Dec 2008
The authors study some coding schemes using Low-Density Parity-Check (LDPC) codes. They specifically concentrate on improved decoding methods and rate-compatible LDPC codes. One of the most...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Unequal Error Protection Using Partially Regular LDPC Codes
Jul 2010
In this paper, the authors propose a scheme to construct Low-Density Parity-Check (LDPC) codes that are suitable for Unequal Error Protection (UEP). They derive Density Evolution (DE) formulas for...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
On Bit Error Rate Performance of Polar Codes in Finite Regime
Oct 2010
Polar codes have been recently proposed as the first low complexity class of codes that can provably achieve the capacity of symmetric binary-input memoryless channels. Here, the authors study the...
Provided by University of Massachusetts
-
White Papers
Coverage and Adaptive Scheduling Algorithms for Criticality Management on Video Wireless Sensor Networks
Aug 2009
In WSN-based surveillance systems power conservation is an important issue but one must also ensure that the application's objectives are met. In this paper, the authors jointly address the...
Provided by Universite de Pau et des Pays de l'Adour
-
White Papers
A Congestion Control Framework for Handling Video Surveillance Traffics on WSN
Jul 2009
This paper focuses on congestion control but while previous works considered scalar sensor nodes which only report events in the size of a few bytes, the authors are addressing congestion control...
Provided by CNRS
-
White Papers
Soft-Decision Metrics for Coded Orthogonal Signaling in Symmetric Alpha-Stable Noise
Jan 2008
This paper derives new soft-decision metrics for coded orthogonal signaling in impulsive noise. For the case of a known channel amplitude and known noise dispersion, exact metrics are derived both...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Rapidly-Deployable Mesh Network Testbed
Oct 2009
This paper describes a wireless mesh network test-bed for research in rapid deployment and auto-configuration of mesh nodes. Motivated by the needs of first responders and military personnel...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Non-Coherent Amplify-and-Forward Generalized Likelihood Ratio Test Receiver
Dec 2008
This paper proposes a simple non-coherent amplify-and-forward receiver for the relay channel and evaluates its diversity performance for Rayleigh fading channels. The authors use the generalized...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Quantize-and-Forward Relaying With M-Ary Phase Shift Keying
Feb 2008
Using cooperative transmission, two or more single-antenna users can share their antennas to achieve spatial diversity in a slow fading channel. One relaying protocol that achieves diversity,...
Provided by National Institute of Standards and Technology
-
White Papers
Software Based MIMO Channel Emulator
Dec 2010
Fox is a software based channel emulator that models a wireless channel with up to 4x4 MIMO paths. While currently supporting 802.11n channel models, Fox can be extended to incorporate other...
Provided by Wireless Innovation Forum
-
White Papers
SMALL: A Strategy-Proof Mechanism for Radio Spectrum Allocation
Mar 2011
With the growing deployment of wireless communication technologies, radio spectrum is becoming a scarce resource. Thus mechanisms to efficiently allocate the available spectrum are of interest. In...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Open or Close: On the Sharing of Femtocells
Mar 2011
The femtocell is an enabling technology to handle exponentially increasing wireless data traffic. Despite extensive attentions paid to resource control, e.g., power control and load balancing in...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Group Registration With Distributed Databases for Location Tracking in 3G Wireless Networks
Feb 2008
The increase of subscribers in wireless networks has led to the need for efficient location tracking strategies. Location tracking is used to keep track of a Mobile Terminal (MT). The network...
Provided by Reed Elsevier
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White Papers
A Link Layer Adaptive Pacing Scheme for Improving Throughput of Transport Protocols in Wireless Mesh Networks
Feb 2008
In this paper, the authors study the performance of a static multi-hop wireless network, specifically that of the backhaul network of a two-tier Wireless Mesh Network (WMN) operating on IEEE...
Provided by Reed Elsevier
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White Papers
SAM-MAC: An Efficient Channel Assignment Scheme for Multi-Channel Ad Hoc Networks
Feb 2008
Using multi-channel MAC protocols in Mobile Ad hoc NETworks (MANETs) is a promising way to improve the throughput performance. Channel assignment, which directly determines the efficiency of the...
Provided by Reed Elsevier
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White Papers
Practical Large-Scale Latency Estimation
Jan 2008
The authors present the implementation of a large-scale latency estimation system based on GNP and incorporated into the Google content delivery network. Their implementation employs standard...
Provided by Reed Elsevier
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White Papers
Stability - Throughput Tradeoff and Routing in Multi-Hop Wireless Ad Hoc Networks
Feb 2008
The authors study the throughput of multi-hop routes and stability of forwarding queues in a wireless ad-hoc network with random access channel. They focus on a wireless network with static nodes,...
Provided by Reed Elsevier
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White Papers
Approximate Analysis of LRU in the Case of Short Term Correlations
Jan 2008
One of the most widely considered cache replacement policies is Least Recently Used (LRU) based on which many other policies have been developed. LRU has been studied analytically in the...
Provided by Reed Elsevier
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White Papers
Performance Analysis of Scheduling and Interference Coordination Policies for OFDMA Networks
Jan 2008
In orthogonal frequency division multiple access systems there is an intimate relationship between the packet scheduler and the Inter-Cell Interference Coordination (ICIC) functionalities: they...
Provided by Reed Elsevier
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White Papers
The P2P War: Someone Is Monitoring Your Activities
Jan 2008
In an effort to legally prosecute P2P users, the RIAA and MPAA have reportedly started to create decoy users: they participate in P2P networks in order to identify illegal sharing of content. This...
Provided by Reed Elsevier
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White Papers
SCPS: A Self-Configuring Power-Saving Protocol for Wireless Ad Hoc Networks
Feb 2008
SCPS is a novel self-configuring power-saving protocol for wireless one-hop ad hoc networks. According to IEEE 802.11 WLAN standard, a station may enter a special Power-Saving (PS) mode. SCPS...
Provided by Reed Elsevier
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White Papers
CellSense: An Accurate Energy-Efficient GSM Positioning System
Jan 2012
Context-aware applications have been gaining huge interest in the last few years. With cell phones becoming ubiquitous computing devices, cell phone localization has become an important research...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Robust Technique for WLAN Device-Free Passive Motion Detection
Jan 2012
The authors present RASID: a system capable of detecting passive human motion using the already installed indoor wireless infrastructure. RASID applies a statistical anomaly detection technique to...
Provided by Alexandria University
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White Papers
Formal Specification and Analysis of PCF Protocol in the 802.11 Standard Using Systems of Communicating Machines
Jan 2012
With the widespread usage of the 802.11 protocol, it becomes important to study the protocol operation. In this paper, the authors propose a formal model for the point coordination function of the...
Provided by University of Maryland
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White Papers
Calibration-Free RF-Based Localization Algorithm for Sensor Actuator Networks Using Particle Filters
Jan 2012
A calibration-free localization algorithm for sensor actuator networks is presented in this paper. The algorithm uses sequential importance sampling to estimate the location of a number of...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Towards an Optimal Strategy for WLAN Location Determination Systems
Jan 2012
This paper presents a general analysis for the performance of WLAN location determination systems. In particular, the authors present an analytical method for calculating the average distance...
Provided by University of Maryland
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White Papers
Propagation Modeling for Accurate Indoor WLAN RSS-Based Localization
May 2010
WLAN RSS-based localization has been a hot research topic for the last years. To obtain high accuracy in the noisy wireless channel, WLAN location determination systems usually use a calibration...
Provided by Nile University
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White Papers
A Deterministic Large-Scale Device-Free Passive Localization System for Wireless Environments
Jun 2010
The widespread usage of wireless local area networks and mobile devices has fostered the interest in localization systems for wireless environments. The majority of research in the context of...
Provided by Association for Computing Machinery
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White Papers
Smart Devices for Smart Environments: Device-Free Passive Detection in Real Environments
Oct 2008
Device-free Passive (DfP) localization is a system envisioned to detect, track, and identify entities that do not carry any device, nor participate actively in the localization process. A DfP...
Provided by Nile University
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White Papers
Maximizing Multiuser Diversity Gains in IEEE 802.11 WLANs
Jan 2008
Opportunistic scheduling monitors the receivers' channel states and schedules packets to the receivers in relatively good channel conditions. Opportunistic scheduling can be easily implemented in...
Provided by Reed Elsevier
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