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wi-fi
(8770 results)-
White Papers
Four-Way TOA and Software-Based Trilateration of IEEE 802.11 Devices
July 1, 2008 12:00am PDT
In this paper the authors present an algorithm that measures the round trip times of IEEE 802.11 MAC packets in order to trilaterate WLAN nodes. They show that if one use packet sequences (e.g.,...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
A Differentiated Cooperative MAC for QoS Enhancement in Wireless LANs
July 1, 2008 12:00am PDT
The Quality of Service (QoS) support in Wireless Local Area Networks (WLANs) faces a big challenge due to timecorrelated fading channel. Conventional Automatic Repeat reQuest (ARQ) schemes based...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Bandwidth Estimation and Distributed Traffic Regulation in Wireless Local Area Networks
July 1, 2008 12:00am PDT
In this paper, the authors introduce distributed traffic regulation for Wireless Local Area Networks (WLANs) operating in ad hoc mode. They use the concept of service curve to determine the...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
OMEGA ICT Project: Towards Convergent Gigabit Home Networks
July 1, 2008 12:00am PDT
Gigabit home networks represent a key technology to make the Future Internet success a reality. The OMEGA European project aims to define and demonstrate such networks. Consumers will require...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Area Throughput for CSMA Based Wireless Sensor Networks
July 1, 2008 12:00am PDT
In this paper the authors present a mathematical approach to evaluate the Area Throughput of a multi-sink Wireless Sensor Network (WSN), where nodes transmit their packets to a sink, selected...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
A New Technique to the Channel Assignment Problem in Mobile Communication Networks
July 1, 2008 12:00am PDT
Channel allocation has been considered a NP-complete problem, and involves a very important issue for the adequate dimensioning of wireless communication networks. One of the possibilities for its...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
On Quasi-Equally Spaced Sampling in Wireless Sensor Networks
July 1, 2008 12:00am PDT
In this paper the authors study wireless sensor networks for monitoring applications. They focus on the problem of sampling and reconstruction of multidimensional bandlimited signals, when the...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Modelling Interference Margins in FFR Enabled WiMAX Systems for Cell Dimensioning
July 1, 2008 12:00am PDT
WiMAX technology has gained worldwide attention due to its potential for providing ubiquitous, broadband wireless access at a competitive cost and quality basis to the current DSL (Digital...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
On the Efficiency of Interference Coordination Schemes in Emerging Cellular Wireless Networks
July 1, 2008 12:00am PDT
In this paper, the efficiencies of different interference coordination schemes are evaluated for emerging wireless networks and the possible impact on intra-cell scheduling is studied through...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Improvement of Bit Error Rate Using Channel Interleaving for Channel Binding WLAN Prototype
July 1, 2008 12:00am PDT
High speed wireless LAN prototype of 324 Mbit/sec has been developed. Six channel binding of 802.11a signal on frequency domain was employed for increasing PHY data rate. Frame aggregation was...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Opportunistic Cooperation and Selective Forwarding, a Virtual MIMO Scheme for Wireless Networks
July 1, 2008 12:00am PDT
Multipath fading greatly degrades system performance of wireless networks. Conventionally diversity is introduced to mitigate fading. In this paper the authors study space diversity in multi-hop...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Cooperative Handoff in Wireless Networks
July 1, 2008 12:00am PDT
In 802.11-based wireless networks the STAtions (STAs) are associated with the available Access Points (APs) and communicate through them. In traditional handoff schemes the STAs get information...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Authenticated Reliable and Semi-Reliable Communication in Wireless Sensor Networks
July 1, 2008 12:00am PDT
Secure communication in wireless ad hoc sensor networks is a major research concern in the networking community. Especially the few available resources in terms of processing power and available...
Provided by: University of Erlangen-Nuremberg
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White Papers
Performance Comparison of Multipath Reactive Ad Hoc Routing Protocols
July 1, 2008 12:00am PDT
The recent proliferation of wireless devices extends the scope of Mobile Ad hoc NETworks (MANETs) applications beyond the military domain to include civil and commercial application scenarios....
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Decentralized Optimization of Wireless Sensor Network Lifetime Based on Neural Network Dynamics
July 1, 2008 12:00am PDT
The wireless sensor networks, which collect various data from a physical environment, are usually defined as an ad hoc network consisted of a huge number of tiny wireless sensor nodes whose...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Location Tracking Assisted Handover Algorithms for Broadband Wireless Networks
July 1, 2008 12:00am PDT
The design of an efficient handover technique is considered a crucial topic in the cellular-based wireless networks. Feasible handover process can minimize the performance degradation as the...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
A Layer 2 Scheme for Inter-RAT Handover Between UMTS and WiMAX in Tight Coupling Architecture
July 1, 2008 12:00am PDT
The future B3G or 4G mobile networks will consist of heterogeneous networks, including GSM, UMTS, and WiMAX. In order to realize a seamless vertical handover (inter-RAT handover), a variety of...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
An Architecture for Community Mesh Networking
July 1, 2008 12:00am PDT
The advances on wireless mesh networks are shifting the communications paradigm, where users can benefit from their cooperation to exchange information and make use of the spectrum space, forming...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Constrained Opportunistic Power Control in Wireless Networks
July 1, 2008 12:00am PDT
In the Opportunistic Power Control algorithm (OPC), designed in, each user tries to keep the product of its transmit power and its experienced effective interference to a constant, called the...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Bidirectional Stochastic Channel Models Are in General WSSUS
July 1, 2008 12:00am PDT
This paper considers a general approach for the computation of all functional characteristics of a probabilistic wireless channel model using a bidirectional parametric description. It is shown...
Provided by: Institute of Electrical and Electronics Engineers
