1,017 research outputs found
WIRELESS LOCAL AREA NETWORK CONCEPTUAL DESIGN AND PLANNING IN CAMPUS (PRACTICE IN UTP)
Wireless communication is currently in a state of rapid evolution. This evolution is
driven by the numerous advantages of the wireless networks. Wireless Local Area
Network (WLAN) is one of the new networking environments where it supports
the mobility of the network user without being encumbered by the existing cable.
Since the current Local Area Network (LAN) in Universiti Teknologi PETRONAS
(UTP) is fairly growth with good performance reliability, shifting the current
setup to WLAN is locally accepted. This will benefit all the UTP users including
students, respective lecturers, and beneficial for administration line of staff. The
current planning and setup will cover certain stages in order to build a high
reliability and best performance of the WLAN environment. Data transmission
and signal strength for the area is practically surveyed in order to obtain best
performance and ability to transmit data in bit per second required.
Research and questionnaire have also been done throughout the UTP students and
IT Media Services Executives, in orderto determine the best design concept to be
applied in UTP campus and to determine the best place for WLAN to be
implemented. Usage models are required in order to support the activity that
will be in the WLANenvironment. The conceptual designofWLAN environment
will cater the area of the student residential including the Student Centre, cafeteria
and student residential. With the design, location of all the devices such as the
wireless access point (AP) and security access point (SAP) to roam the signal
coverage and to secure the signal for data transmission can be determined. The
technology used in data transmission is also being covered in this research paper,
which includes the Spread Spectrum LAN. To ensure the system meets the
budgeted cost, the author came out with the budgeting plan for all the devices
allocated for the WLAN setup. The WLAN planning and setup in UTP will help
the UTP management in getting the idea to implement a WLAN environment
insidethe campusas wellto compliance with the currentLANsetup
Demystifying Wireless Technologies: Navigating Through The Wireless Technology Maze
A significant part of the growth in consumer-to-business electronic commerce is likely to originate from the increasing numbers of mobile computing devices and smart telephone devices. Most of the data from mobile computers will be carried over by emerging wireless networks. Many wireless technologies and standards are now available. As a result, it is becoming increasingly difficult for non-domain experts like managers, to sort through the maze of wireless technologies and standards to make business decisions involving these technologies. This article surveys existing and emerging wireless technologies and uses the Open System Interconnect (OSI) framework to organize the wireless landscape. The survey provides a quick reference to the entire spectrum of wireless technologies in use today
Fast Authentication in Heterogeneous Wireless Networks
The growing diffusion of wireless devices is leading to an increasing demand for mobility and security. At the same time, most applications can only tolerate short breaks in the data flow, so that it is a challenge to find out mobility and authentication methods able to cope with these constraints. This paper aims to propose an authentication scheme which significantly shortens the authentication latency and that can be deployed in a variety of wireless environments ranging from common Wireless LANs (WLANs) to satellite-based access networks
Improving the Performance of Wireless LANs
This book quantifies the key factors of WLAN performance and describes methods for improvement. It provides theoretical background and empirical results for the optimum planning and deployment of indoor WLAN systems, explaining the fundamentals while supplying guidelines for design, modeling, and performance evaluation. It discusses environmental effects on WLAN systems, protocol redesign for routing and MAC, and traffic distribution; examines emerging and future network technologies; and includes radio propagation and site measurements, simulations for various network design scenarios, numerous illustrations, practical examples, and learning aids
Treatment-Based Classi?cation in Residential Wireless Access Points
IEEE 802.11 wireless access points (APs) act as the central communication hub inside homes, connecting all networked devices to the Internet. Home users run a variety of network applications with diverse Quality-of-Service requirements (QoS) through their APs. However, wireless APs are often the bottleneck in residential networks as broadband connection speeds keep increasing. Because of the lack of QoS support and complicated configuration procedures in most off-the-shelf APs, users can experience QoS degradation with their wireless networks, especially when multiple applications are running concurrently.
This dissertation presents CATNAP, Classification And Treatment iN an AP , to provide better QoS support for various applications over residential wireless networks, especially timely delivery for real-time applications and high throughput for download-based applications. CATNAP consists of three major components: supporting functions, classifiers, and treatment modules. The supporting functions collect necessary flow level statistics and feed it into the CATNAP classifiers. Then, the CATNAP classifiers categorize flows along three-dimensions: response-based/non-response-based, interactive/non-interactive, and greedy/non-greedy. Each CATNAP traffic category can be directly mapped to one of the following treatments: push/delay, limited advertised window size/drop, and reserve bandwidth. Based on the classification results, the CATNAP treatment module automatically applies the treatment policy to provide better QoS support.
CATNAP is implemented with the NS network simulator, and evaluated against DropTail and Strict Priority Queue (SPQ) under various network and traffic conditions. In most simulation cases, CATNAP provides better QoS supports than DropTail: it lowers queuing delay for multimedia applications such as VoIP, games and video, fairly treats FTP flows with various round trip times, and is even functional when misbehaving UDP traffic is present. Unlike current QoS methods, CATNAP is a plug-and-play solution, automatically classifying and treating flows without any user configuration, or any modification to end hosts or applications
WiLiTV: A Low-Cost Wireless Framework for Live TV Services
With the evolution of HDTV and Ultra HDTV, the bandwidth requirement for
IP-based TV content is rapidly increasing. Consumers demand uninterrupted
service with a high Quality of Experience (QoE). Service providers are
constantly trying to differentiate themselves by innovating new ways of
distributing content more efficiently with lower cost and higher penetration.
In this work, we propose a cost-efficient wireless framework (WiLiTV) for
delivering live TV services, consisting of a mix of wireless access
technologies (e.g. Satellite, WiFi and LTE overlay links). In the proposed
architecture, live TV content is injected into the network at a few residential
locations using satellite dishes. The content is then further distributed to
other homes using a house-to-house WiFi network or via an overlay LTE network.
Our problem is to construct an optimal TV distribution network with the minimum
number of satellite injection points, while preserving the highest QoE, for
different neighborhood densities. We evaluate the framework using realistic
time-varying demand patterns and a diverse set of home location data. Our study
demonstrates that the architecture requires 75 - 90% fewer satellite injection
points, compared to traditional architectures. Furthermore, we show that most
cost savings can be obtained using simple and practical relay routing
solutions
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