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mobile - wireless communications
(58934 results)-
Whitepapers
On the User-Centric Connection Availability of Mobile Wireless Networks
Apr 2011
In this paper, the authors study the connection availability of wireless networks from the perspective of end users with individual mobility, in contrast to existing studies mainly focusing on...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Channel Aggregation in Cognitive Radio Networks With Practical Considerations
Apr 2011
In Cognitive Radio (CR) networks, licensed spectrum that can be shared by Secondary Users (SUs) is always restricted by the needs of Primary Users (PUs). Although Channel Aggregation (CA) can...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Power Allocation for Cognitive Radio Networks Under Channel Uncertainty
Apr 2011
Cognitive Radio (CR) networks can re-use the RF spectrum licensed to the Primary User (PU) network by carefully controlling the interference to the PUs. However, due to lack of explicit support...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Value of Prediction in Opportunistic Radio Systems
Apr 2011
In opportunistic spectrum access, radios sense their environment and adapt communication to utilize unused licensed spectrum without interfering with licensed users. A true cognitive radio,...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
LocalTree: An Efficient Algorithm for Mobile Peer-to-Peer Live Streaming
Apr 2011
Mobile Peer-To-Peer (P2P) technique is a promising approach to provide live video streaming. In mobile P2P streaming, mobile devices relay their received packets in a multi-hop manner by means of...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Content-Based Image Compression for Arbitrary-Resolution Display Devices
Apr 2011
In this paper addresses the increasing demand of visual signal delivery to terminals with arbitrary resolutions (like in mobile multimedia communication and cloud computing) for universal access...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
The Effect of Redundancy on Video Broadcasting in Vehicular Networks
Apr 2011
Advancements in on-board and wireless communication technologies provide the backbone for the deployment of a wireless network among vehicles. Most of the envisioned applications would offer...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Interference Strength Alignment and Uplink Channel Allocation in Linear Cellular Networks
Apr 2011
The authors find the uplink channel allocation that maximizes the total throughput in linear (one-dimensional) cellular systems, under arbitrary fairness constraints defined by resource...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Distributed Beam Scheduling in Multi-Cell Networks Via Auction Over Competitive Markets
Apr 2011
The capacity of a wireless network could be considerably improved by employing directional antennas which are capable of illuminating multiple beams toward different directions. However, more...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Impact of Delayed Limited Feedback on the Sum-Rate of Intercell Interference Nulling
Apr 2011
Users in a multicell cooperative system can feedback Channel State Information (CSI) of desired and interfering channels to the base station(s) using finite-bandwidth links to manage co-channel...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Predictive Scheduling in Drive-Thru Networks With Flow-Level Dynamics and Deadlines
Apr 2011
This paper addresses the downlink scheduling issue in drive-thru networks which is characterized by flow-level dynamics and user basis deadlines. Vehicular users requesting for data download...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Efficient Discovery of Spectrum Opportunities Via Adaptive Collaborative Spectrum Sensing in Cognitive Radio Networks
Apr 2011
In this paper, the authors construct a novel MAC-layer sensing framework for fast discovery of spectrum opportunities. They employ the sequential probability ratio test and a novel collaborative...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Scalable Video Coding With Compressive Sensing for Wireless Videocast
Apr 2011
Channel coding such as Reed-Solomon (RS) and convolutional codes has been widely used to protect video transmission in wireless networks. However, this type of channel coding can effectively...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Layered Video Transmission Using Wireless Path Diversity Based on Grey Relational Analysis
Apr 2011
Scalable video applications have been gaining popularity during last years. Providing high quality video over wireless networks towards heterogeneous receivers is a challenging task due to erratic...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Time and Cost-Efficient Modeling and Generation of Large-Scale TPCC/TPCE/TPCH Workloads
Jul 2011
Large-scale TPC workloads are critical for the evaluation of datacenter-scale storage systems. However, these workloads have not been previously characterized, in-depth, and modeled in a DC...
Provided by Stanford University
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Whitepapers
A Wireless Sensor Network for Precision Agriculture and Its Performance
Aug 2011
The use of wireless sensor networks is essential for implementation of information and control technologies in precision agriculture. The authors present their design of network stack for such an...
Provided by Iowa State University
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Whitepapers
Approximation Algorithms for Many-to-Many Traffic Grooming in WDM Mesh Networks
Dec 2009
A large number of network applications today allow several users to interact together using the many-to-many service mode. In many-to-many communication, also referred to as group communication, a...
Provided by Iowa State University
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Whitepapers
Cluster Based Cooperative Caching Technique in Mobile Ad Hoc Networks
Jan 2012
One of the most attractive techniques used to improve the data retrieval performance in wireless mobile environment is caching. In Mobile Ad hoc NETworks (MANETs), updating of cached data item...
Provided by EuroJournals
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Whitepapers
Energy Efficient Cooperative Caching in Mobile Ad Hoc Networks
Dec 2010
MANETs or mobile ad hoc networks are a form of wireless networks which do not require a base station for providing network connectivity. Mobile ad hoc networks have many characteristics which...
Provided by Indian Institute of Technology Roorkee
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Whitepapers
On the Role of Vehicular Mobility in Cooperative Content Caching
Mar 2012
In this paper, the authors analyze the performance of cooperative content caching in Vehicular Ad hoc NETworks (VANETs). In particular, they characterize, using analysis and simulations, the...
Provided by Nile University
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Whitepapers
Application of Path Duration Study in Multihop Ad Hoc Networks
Mar 2008
Some ad hoc protocols allow the discovery and/or storage of multiple routes to the same destination node. The selection of the path to utilize is commonly based on the criterion of the minimum...
Provided by Springer Science+Business Media
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Whitepapers
High Efficiency, High Switching Speed, AlGaAs/Gaas P-HEMT DC-DC Converter for Integrated Power Amplifier Modules
Sep 2010
In wireless communication systems, the efficiency of the Radio Frequency Power Amplifiers (RF-PA) dominates the power consumption of the radio transceiver. In addition, to improve spectral...
Provided by Rensselaer Polytechnic Institute
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Whitepapers
Triple-Push Operation for Combined Oscillation/Divison Functionality in Millimeter-Wave Frequency Synthesizers
Oct 2010
This paper proposes the use of N-push operation for combining the functions of the VCO and divider in the mm-wave frequency range. If employed in a PLL, the Combined VCO/Divider (C-VCO/D) would...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Analysis and Optimization of Transformer-Based Series Power Combining for Reconfigurable Power Amplifiers
Aug 2010
Transformer-based series power combiners are analyzed within the context of reconfigurable, watt-level, wideband digital envelope tracking transmitters. A model is developed for designing and...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A 1.94 to 2.55 GHz, 3.6 to 4.77 GHz Tunable CMOS VCO Based on Double-Tuned, Double-Driven Coupled Resonators
Sep 2009
This paper presents a multi-band CMOS VCO using a double-tuned, current-driven transformer load. The dual frequency range oscillator is based on enabling/disabling the driving current in the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A 0.5-V 3.6/5.2 GHz CMOS Multi-Band LC VCO for Ultra Low-Voltage Wireless Applications
Jun 2008
In this paper, an ultra low-voltage multiband CMOS VCO based on tunable band-limited negative resistance approach is presented. The proposed technique eliminates the need for switching elements...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Trends in Broadband Wireless Networks Technologies
Dec 2011
The growth of wireless broadband networks is expected to gradually outpace landline communications because advancements in these technologies have continued to enable higher broadband speeds. In...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Database and Information Security Concerns
Dec 2011
With rise in reliance on distributed information systems for daily business, all business organization are now vulnerable to security threats. A number of techniques are currently available to...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Solving FPGA Routing Using Ant Colony Optimization With Minimum CPU Time
Dec 2011
In this paper ANT colony optimization algorithm are used to solve geometric FPGA routing for a route based routing constraint model in FPGA design architecture which is a NP complete problem in...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Mobile Ad-Hoc Network Routing Principle and Protocol Evaluation Metrices
Dec 2011
A mobile ad-hoc network is comprised of mobile hosts that can communicate with each other using wireless links. A MANET is a system of wireless mobile nodes that dynamically self organize in...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Context Based Location Management for MANET in Disaster Area Using Mobile Agent
Dec 2011
A major challenge faced in Mobile Ad Hoc NETworks (MANET) is locating mobile devices for communication, especially with high node mobility and sparse node density due to disaster in disaster area....
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Analysis of Different Propagation Model for IPSec-LANMAR Routing Protocol to Secure Network Layer for MANET in Emergency Area Environment
Dec 2011
Mobile Ad hoc NETworks (MANETs) consist of a collection of wireless mobile nodes, which dynamically exchange data among themselves without the reliance of a fixed base station. It have potential...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Dynamic Routing Key Distribution in Security Considerations
Dec 2011
In wireless network to protect the sensitive data Security has become one of the major issues for data communication over wired and wireless networks. Different from the past work on the designs...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
An Impression of Routing Protocol in Manet
Dec 2011
Ad Hoc network is a collection of wireless mobile hosts forming a temporary network without the aid of any centralized administration, in which individual nodes cooperate by forwarding packets to...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Efficient Scheduling in Computational Grid With an Improved Ant Colony Algorithm
Dec 2011
Grid Computing is a form of distributed computing that involves coordinating and sharing computing, application, network resources across dynamic and geographically dispersed organizations. The...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
A Novel Solution for Effective Bandwidth Utilization in 802.16 Networks
Dec 2011
Bandwidth is reserved for each application to ensure the QoS. In this paper, the authors propose a scheme, named Effective Bandwidth Utilization, to recycle the unused and free bandwidth without...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
A Survey on Behaviour of AODV and OLSR Routing Protocol of Manets Under Black Hole Attack
Dec 2011
A wireless ad-hoc network is a temporary network set up by wireless nodes usually moving randomly and communicating without a network infrastructure. Due to security vulnerabilities of the routing...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Reliable Multi-Hop Routing in Wireless Sensor Networks
Dec 2011
The optimal reliable Multi-hop virtual Multiple-Input Single-Output (vMISO) routing in ad hoc networks. Under a high node density regime, Optimal cooperating set cardinality curves are derived,...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
A Software Framework for User Level QoS in Unreliable Internet Connection
Jun 2011
This paper describes a QoS framework that provides support for user Quality of Service (QoS) specification and service enforcement in low-quality connection environment using user-oriented...
Provided by International Journal on Computer Science and Technology (IJCST)
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Whitepapers
Use of Mobile Devices for Location Tracking
Jun 2011
Mobile penetration in India has reached 66.20% with a subscriber base of 826.93 million mobile phone subscribers as of April 2011. Besides ubiquitous access, a Mobile Device is useful for getting...
Provided by International Journal on Computer Science and Technology (IJCST)
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White Papers
Validation of a Wireless Traffic Vibration Monitoring System for the Voigt Bridge
Jul 2009
Recently, a variety of wireless structural health monitoring systems has been demonstrated as viable substitutes for traditional high-cost tethered monitoring systems. In this study, a prototype...
Provided by University of Michigan
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White Papers
Strategic Network Utilization in a Wireless Structural Control System for Seismically Excited Structures
May 2009
The benefits associated with structural control include the mitigation of undesired structural responses and reduction in the probability of damage to structural components during seismic events....
Provided by American Society of Civil Engineers
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White Papers
Integral SHM-System for Offshore Wind Turbines Using Smart Wireless Sensors
Sep 2007
Currently, wind turbines can incur unforeseen damage up to five times a year. Particularly during bad weather, wind turbines located offshore are difficult to access for visual inspection. As a...
Provided by University of Michigan
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White Papers
Generic Network Forensic Data Acquisition From Household and Small Business Wireless Routers
Mar 2010
People are benefiting tremendously from pervasively deployed WiFi networks. However, criminals may exploit the anonymity of WiFi communication and wireless routers to access illegal content such...
Provided by Towson University
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White Papers
Traffic Aware Power Saving Protocol in Multi-Hop Mobile Ad-Hoc Networks
Aug 2007
This paper presents an optimization of PSM to improve its energy conservation. According to PSM, time is divided into beacon intervals. At the beginning of each beacon interval, all stations must...
Provided by Academy Publisher
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White Papers
Cross-Layering in an Industrial Wireless Sensor Network: Case Study of OCARI
Aug 2009
Wireless sensor networks are adapted to monitoring applications. Specific solutions have to be developed for industrial environments in order to deal with the harsh radio conditions and the QoS...
Provided by Academy Publisher
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White Papers
Localization in Wireless Sensor Networks
Dec 2010
Due to the close integration of sensor networks with the real world, the categories time and location are fundamental for many applications of sensor networks, to interpret sensing results or to...
Provided by ICT Innovations
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White Papers
TOSThreads: Thread-Safe and Non-Invasive Preemption in TinyOS
Nov 2009
Many threads packages have been proposed for programming wireless sensor platforms. However, many sensor network operating systems still choose to provide an eventdriven model, due to efficiency...
Provided by Association for Computing Machinery
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White Papers
Performance Evaluation of the Collection Tree Protocol Based on Its Implementation for the Castalia Wireless Sensor Networks Simulator
Aug 2010
Many wireless sensor network applications rely on the availability of a collection service to route data packets towards a sink node. The service is typically accessed through well defined...
Provided by ETH Zurich
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White Papers
FairWaiting Protocol: Achieving Isolation InWireless Sensornets
Oct 2007
The authors present the Fair Waiting Protocol (FWP), a novel method of improving visibility through the isolation of competing network protocols on CSMA networks. Sitting between layers 2 and 3,...
Provided by Stanford University
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White Papers
The Factor K: Inferring Protocol Performance Using Inter-Link Reception Correlation
Oct 2009
This paper explores metrics that capture to what degree packet reception on different links is correlated. It shows that a widely used metric is a bad measure and presents normalized cross...
Provided by Stanford University
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White Papers
A Case for Evaluating Sensor Network Protocols Concurrently
Sep 2010
Researchers typically evaluate and compare protocols on the testbeds by running them one at a time. This methodology ignores the variation in link qualities and wireless environment across these...
Provided by Association for Computing Machinery
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White Papers
The Case for a Network Protocol Isolation Layer
Nov 2009
Network protocols are typically designed and tested individually. In practice, however, applications use multiple protocols concurrently. This discrepancy can lead to failures from unanticipated...
Provided by Association for Computing Machinery
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White Papers
Interference-Aware Transmission Power Control for Wireless Sensor Networks
Nov 2008
Maintaining the lowest possible transmission power in the Wireless Sensor Networks (WSNs) is vulnerable to the interference fluctuations because of the bad signal-to-Interference-Plus-Noise-Ratio...
Provided by Institute of Electronics, Information and Communication Engineers
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White Papers
Flush: A Reliable Bulk Transport Protocol for Multihop Wireless Networks
Nov 2007
The authors present Flush, a reliable, high goodput bulk data transport protocol for wireless sensor networks. Flush provides end-to-end reliability, reduces transfer time, and adapts to...
Provided by Association for Computing Machinery
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White Papers
Interface Contracts for TinyOS
Apr 2009
TinyOS applications are built with software components that communicate through narrow interfaces. Since components enable fine grained code reuse, this approach has been successful in creating...
Provided by Association for Computing Machinery
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White Papers
SWAT: Enabling Wireless Network Measurements
Nov 2008
Measuring low-level wireless network properties allows researchers to understand how protocols and applications perform in different environments. In this demo, the authors present SWAT - a...
Provided by Association for Computing Machinery
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White Papers
Increasing the Reliability of Wireless Sensor Networks With a Distributed Testing Framework
Jun 2007
Designing Wireless Sensor Networks (WSNs) has proven to be a slow, tedious and error-prone process due to the inherent intricacies of designing a distributed, wireless, and embedded system. A...
Provided by Association for Computing Machinery
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White Papers
Koala: Ultra-Low Power Data Retrieval in Wireless Sensor Networks
Mar 2008
The authors present Koala, a reliable data retrieval system designed to operate at permille (.1%) duty cycles, essential for long term environmental monitoring networks. Koala achieves these low...
Provided by Johns Hopkins University
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White Papers
PAC Vs. MAC for Decentralized Detection Using Non-coherent Modulation
Mar 2009
In decentralized detection, local sensor observations have to be communicated to a fusion center through the wireless medium, inherently a Multiple-Access Channel (MAC). As communication is...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Intra-Car Wireless Sensor Networks
May 2010
Modern vehicles incorporate tens of sensors to provide vital sensor information such as temperature, air quality, tire pressure, distances to nearby objects, etc., for the Electronic Control Units...
Provided by Carnegie Mellon University
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White Papers
Energy-Efficient Anonymous Multicast in Mobile Ad-Hoc Networks
Sep 2007
Protecting personal privacy and energy efficiency are two primary concerns for mobile ad hoc networks. However, no energy-efficient multicast algorithm designed for preserving anonymity has been...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
SAMPL: A Simple Aggregation and Message Passing Layer for Sensor Networks
Nov 2008
In recent years, wireless sensor networking has shown great promise in applications ranging from industrial control, environmental monitoring and inventory tracking. Given the resource-constrained...
Provided by Association for Computing Machinery
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White Papers
On the Impact of Manufacturing Process Variations on the Lifetime of Sensor Networks
Oct 2007
As an emerging technology, sensor networks provide the ability to accurately monitor the characteristics of wide geographical areas over long periods of time. The lifetime of individual nodes in a...
Provided by Association for Computing Machinery
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White Papers
Challenges in Deploying Steerable Wireless Testbeds
Jul 2010
Phased array antennas enable the use of real-time beam-forming and null-steering to further increase control of signal strength and interference in wireless networks. Understanding the potential...
Provided by University of Colorado
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White Papers
Guaranteeing Secrecy in Wireless Networks Using Artificial Noise
Aug 2007
The broadcast nature of the wireless medium makes the communication over this medium vulnerable to eavesdropping. This report considers the problem of secret communication between two nodes, over...
Provided by Carnegie Mellon University
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White Papers
Quantifying the Costs of a Nationwide Broadband Public Safety Wireless Network
Sep 2008
The problems facing the public safety wireless communication systems in the US could be significantly reduced or eliminated through the deployment of a single nationwide network that serves all...
Provided by Carnegie Mellon University
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White Papers
Detecting Network-Wide and Router-Specific Misconfigurations Through Data Mining
Feb 2009
Recent studies have shown that router misconfigurations are common and can have dramatic consequences to the operations of a network. Misconfigurations can compromise the security of an entire...
Provided by Association for Computing Machinery
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White Papers
IMS Architecture for 3G Mobile and PC Audio/video Convergence
Oct 2007
One of the most discussed challenges that worldwide carriers are facing today is the telecommunication networks convergence. Third generation mobile networks and broadband access to the Internet...
Provided by Mirial
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White Papers
An Interactive Visual Communication Architecture Proposal for Telehealth
Nov 2009
Amongst the one-and-a-half billion people around the world surfing the Internet regularly, millions have gone online seeking medical information. The widespread access to broadband Internet,...
Provided by Mirial
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White Papers
Collision Free MAC Protocols for Wireless Ad Hoc Networks Based on BIBD Architecture
Dec 2007
Wireless Ad hoc networks represent a powerful telecommunication infrastructure that is being exploited for enabling general wireless networking connectivity for a variety of significant...
Provided by Academy Publisher
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White Papers
Store and Forward Applications in Telemedicine for Wireless IP Based Networks
Dec 2007
Telemedicine is the use of telecommunications technology to provide medical information and services. It may be as simple as two health professionals discussing a case over the telephone, or as...
Provided by Academy Publisher
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White Papers
An Improved Packet Loss Recovery in VoIP Using Combined Source and Receiver Based Technique
Nov 2009
Voice over Internet Protocol is an upcoming technology that enables voice communication through the Internet. The transmission of audio data over packet switched networks faces lot of difficulties...
Provided by Academy Publisher
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White Papers
Key Management and Authentication in Ad Hoc Network Based on Mobile Agent
Aug 2009
Key management and authentication is important to security of Mobile Ad Hoc network (MANET). Based on the (t, n) threshold cryptography, this paper introduced mobile agents to exchange private key...
Provided by Academy Publisher
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White Papers
Mobile Agent System for Supply Chain Management
Dec 2009
In the 21st century, competition between companies has been turned into the competition between their supply chains. To satisfy the rapidly changing demands in global market, agile capability and...
Provided by Academy Publisher
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White Papers
A Large Scalable, Distributed Simulation Framework for Ambient Networks
Dec 2008
In this paper, the authors present a new simulation platform for complex, radio standard spanning mobile Ad Hoc networks. SimANet - Simulation Platform for Ambient Networks - allows the...
Provided by Academy Publisher
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White Papers
Media-Oriented Service Composition With Service Overlay Networks: Challenges, Approaches and Future Trends
May 2010
The massive and timely delivery of media is gradually integrating itself with the dynamic composition of media-oriented services so that new types of customized media services can be created...
Provided by Academy Publisher
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White Papers
Mobile TV Broadcasting
Apr 2008
Mobile TV take-off success will depend on the careful design of services, i.e. attractive content, marketing, i.e. sensible pricing, choice of optimum technology evolution, good handset, i.e. easy...
Provided by Nokia Siemens Networks
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White Papers
Contextual Information Access With Augmented Reality
Sep 2010
The authors have developed a prototype platform for contextual information access in mobile settings. Objects, people, and the environment are considered as contextual channels or cues to more...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Throughput and Fairness in CSMA/CA Wireless Networks
Jan 2011
While physical layer capture has been observed in real implementations of wireless devices accessing the channel like 802.11, log-utility fair allocation algorithms based on accurate channel...
Provided by Columbia University
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Whitepapers
Designing Securely Connected Wireless Sensor Networks in the Presence of Unreliable Links
Apr 2011
The authors investigate the secure connectivity of wireless sensor networks under the pair-wise key distribution scheme of Chan et al.. Unlike recent work which was carried out under the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Polygon Simplification for Location-Based Services Using Population Density
Apr 2011
An important group of Location-Based Services (LBS), including 9-1-1 service, rely on the mapping between a user's location and a service boundary in order to select the appropriate service...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
MRD: A Mashup Resource Discovery Approach Applying Semantics Indexing
Apr 2011
The mashup is a hot research topic in recent years. In this paper, the authors propose an efficient Mashup Resource Discovery (MRD) approach to facilitating mashup searching. Based on an index...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Adaptation of Bittorrent for Heterogeneous Networks and ISPs- Constraints
Apr 2011
The Bittorrent P2P (Peer-To-Peer) network is now well-known and widely used. In Europe, it is mainly used with people connected to ADSL networks. However, with the emergence of various access...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Near Optimum Majority-Logic Based Decoding of Low-Density Parity-Check Codes
Apr 2011
A reliability-based iterative majority-logic decoding algorithm for regular Low-Density Parity-Check (LDPC) codes was recently proposed by Huang et al. In this paper, the authors present an...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Architecture-Aware Construction of Raptor Codes
Apr 2011
Raptor codes are a class of concatenated codes composed of a fixed-rate precode and a Luby-Transform (LT) code that can be used as rate-less error-correcting codes over communication channels....
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Spatial Multiplexing With MMSE Receivers in Ad Hoc Networks
Apr 2011
The performance of spatial multiplexing systems with linear minimum-mean-squared-error receivers is investigated in ad hoc networks. The authors present new exact closed-form expressions for the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Modelling QoS Performance of IEEE 802.11 DCF Under Practical Channel Fading Conditions
Apr 2011
The authors consider the impacts of channel fading on the Quality of Service (QoS) performance of the IEEE 802.11 system. Traditional 2-D Markov chain models, while suitable for throughput...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Analytical Model for Broadcast Packet Reception Rates in Two-Dimensional MANETs
Apr 2011
In this paper, an analytic model is developed to derive a closed form broadcast packet reception rates in IEEE 802.11 based Two-Dimensional (2-D) Mobile Ad-hoc NETworks (MANETs), which is the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Field Experimental Results on E-UTRA Downlink Throughput Using Polarization Diversity Antennas
Mar 2009
The 3GPP has extensively discussed the 3G Long Term Evolution (LTE) and the core specifications were frozen at the end of 2008. The Evolved UMTS Terrestrial Radio Access (EUTRA), which is the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Interference Management Through Resource Allocation in Multi-Cell OFDMA Networks
Mar 2009
This paper addresses the problem of Inter-Cell Interference (ICI) management in the context of single frequency broadband OFDMA-based networks. Five proposals, based on a combination of ICI...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Autonomous Inter Cell Interference Avoidance Under Fractional Load for Downlink Long Term Evolution
Mar 2009
The main source of interference in OFDMA system in downlink is inter-cell interference, which can severely limit the throughput of users near the cell edge. The Inter-Cell Interference...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Multi-Layer Optimized Packet Scheduling for OFDMA-Based Cellular Systems
Mar 2009
Orthogonal Frequency Division Multiple Access (OFDMA) systems have recently drawn considerable attention as potential candidates for future generation cellular systems. To achieve proportional...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Adjacent Channel Interference Between Asynchronous TDD Cellular Networks
Mar 2009
The increasing user density and higher data rate demands of future wireless networks are to be met with new technologies under the scope of IMT-Advanced. The required high data rates can be...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Interference-Aware Resource Allocation for Device-to-Device Radio Underlaying Cellular Networks
Mar 2009
Future cellular networks such as IMT-Advanced are expected to allow underlaying direct Device-To-Device (D2D) communication for spectrally efficient support of e.g. rich multimedia local services....
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Comparative Analysis of Non-Synchronized Initial Random Access for Mobile Broadband Systems
Mar 2009
In this paper, a comparative analysis of the performance of the non-synchronized initial random access channel in Mobile WiMAX and E-UTRA systems under different conditions (fast fading, multiuser...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Towards Random Access Channel Self-Tuning in LTE
Mar 2009
Future radio access networks are expected to show a high degree of self-organization. This paper addresses self-tuning of the Random Access CHannel (RACH) in the 3G Long Term Evolution (LTE). The...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Link Level Investigation of ACK/NACK Bundling for LTE TDD
Mar 2009
In LTE TDD there is typically no one-to-one association between UL and DL subframes, and for DL heavy asymmetries with more DL than UL subframes, ACK/NACK reports for multiple DL subframes need to...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Distributed Power Control Mechanisms for HSDPA Femtocells
Mar 2009
Femtocells are low-cost, miniature basestations intended to improve indoor coverage in 3G networks and beyond. One of the main issues in adopting femtocells en masse is the surge in interference...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Simplified Cross-Layer Optimization for Power Allocation in MIMO-OFDM Systems
Mar 2009
This paper suggests an efficient power allocation scheme for Multiple Input and Multiple Output - Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems achieving near-optimum. The authors...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Short-Term Power Allocation for Slowly Fading Channels Based on Markov Prediction
Mar 2009
An optimal power allocation algorithm for delay-limited energy-constrained data transmission in block-fading channels, where blocks are separated in time, is proposed in this paper. Using this...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Performance of Device-to-Device Underlay Communication With Simple Power Control
Mar 2009
The authors address Device-To-Device (D2D) communication as a potential resource reuse technique underlaying the cellular network. They consider the shared channel of the two systems as an...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Novel Rate Allocation Scheme For Throughput Maximization Considering Rate Fairness in Wireless Relay Systems
Mar 2009
This paper proposes a rate allocation scheme for throughput maximization considering rate fairness in wireless relay systems. The throughput maximization problem is formulated to two link data...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Effect of Relaying on Coverage in 3GPP LTE-Advanced
Mar 2009
Current broadband wireless networks are characterized by large cell sizes. Yet, even in advanced networks that will be built using 3GPP Long Term Evolution (LTE), also referred to as 3GPP...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Distributed Point Coordination Function for Wireless Ad Hoc Networks
Mar 2009
In this paper, the authors describe a new MAC protocol for ad hoc networks called Distributed Point Coordination Function (DPCF). It constitutes an extension of the PCF of the IEEE 802.11 Standard...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Simple and Efficient Data Forwarding Mechanism in Wireless Relay Networks
Mar 2009
Wireless relay network is a low-cost solution for extending the service coverage and increasing the throughput of the conventional single-hop wireless network. By deploying a relay network, a Base...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Opportunistic Scheduling and Adaptive Modulation in Wireless Networks With Network Coding
Mar 2009
So far, many researches on network coding are performed with higher layer protocols such as MAC, routing, and flow control protocols without consideration of physical layer issues such as channel...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
An Asymptotically Fair Subcarrier Allocation Algorithm in OFDM Systems
Mar 2009
Dynamic subcarrier allocation improves the performance of OFDM systems by exploiting multi-user diversity. Fairness index is a parameter which indicates how fairly the subcarriers are allocated...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
HYGIENE Scheduling for OFDMA Wireless Cellular Networks
Mar 2009
Packet scheduling algorithms are viewed as one of the key mechanisms for increasing the diversity order, robustness and effectiveness of a wireless multi-user communication system. Traditional...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Analysis of Proportional Fair Scheduling With Partial Feedback Information for Multiuser Multicarrier Systems
Mar 2009
The authors consider multiuser multicarrier systems, where each non-symmetrically distributed user reports only partial indices of subcarriers whose normalized SNRs exceed the predetermined...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Interference Aware Scheduling for Soft Frequency Reuse
Mar 2009
In this paper, the authors present an interference aware phased scheduling strategy for a Soft Frequency Reuse (SFR) interference coordination scheme in an Orthogonal Frequency Division Multiple...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Applicability of Image Processing Techniques in the Radio Environment Characterisation
Mar 2009
This paper presents a novel framework based on image processing techniques for the radio environment characterisation. Specifically, after digitalising a given scenario in accordance with the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Comparison of Spectrum Sharing Techniques for IMT-A Systems in Local Area Networks
Mar 2009
The explosive growth of mobile communications on one hand and the overly crowded and expensive spectrum on the other hand have fueled hot debates on spectrum sharing techniques, anticipating...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Temporal and Spatial Spectrum Assignment in Next Generation OFDMA Networks Through Reinforcement Learning
Mar 2009
This paper proposes a Dynamic Spectrum Assignment strategy in the context of next generation multicell Orthogonal Frequency Division Multiple Access networks. The proposed strategy is able to...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Dynamic Frequency Planning Versus Frequency Reuse Schemes in OFDMA Networks
Mar 2009
In order to avoid inter-cell interference, OFDMA networks are flexible in terms of radio resource management techniques, supporting different Frequency Reuse Schemes (FRSs), which in turn, may...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
An Enhancement of Sleep Mode Operation in IEEE 802.16e Systems
Mar 2009
IEEE 802.16e has specified sleep mode operations depending on different types of power saving class for the purpose of energy saving. To solve the inefficient problem of multiple power saving...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Link Level Simulation Study of Downlink MIMO and Uplink HARQ in IEEE 802.16e Wimax System
Mar 2009
The performance of the UpLink (UL) and DownLink (DL) of IEEE 802.16e-2005 or Worldwide Inter-Operability Microwave Access (WiMAX) standard is studied via extensive computer simulations in this...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimization of Channel Quality Indication Signaling in WiMAX System
Mar 2009
Proportional Fair (PF) scheduling is a widely used technique in recent wireless communication systems. However, scheduling will also bring about a lot of signaling overhead especially in OFDMA...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Bandwidth Allocation for Video Streaming in WiMax Networks
Mar 2009
The authors describe an analytical model, based on a Markov chain, suitable to study different bandwidth allocation policies for video streams over a WiMax access link. The Markov chain models an...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
WiMax MBS Power Management, Channel Receiving and Switching Delay Analysis
Mar 2009
In Wimax MBS (Multicast-Broadcast System), the power savings and channel switching delay are two critical performance metrics that affects the viewing time capacity and quality of experience of...
Provided by Institute of Electrical & Electronic Engineers
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