wireless ATM links Research Papers (original) (raw)

In this paper we investigate the influence of buer,management for TCP on performance of the High Speed Downlink Channel (HS-DSCH) introduced in WCDMA release 5. HS-DSCH is a shared channel, but user data is buered,individually prior to the wireless link. Three queue man- agement principles, e.g., passive queuing, the Packet Discard Prevention Counter (PDPC) method,and the Random Early Detection

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- Buffer Management, Packet Loss, wireless ATM links, Round Robin

Mesh networks are candidate to play the role of switched Ethernet LANs over extended areas and with a sensibly higher flexibility. Actually, mesh networks can exploit both Ethernet and wireless technologies, e.g. Wi-Fi and/or free-space optical links, to provide a high degree of redundancy in an access network, and to provide users with powerful means to connect with each other.

- by Vincenzo Mancuso
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- Mesh Networks, Free Space Optics, Wireless Technology, Local Area Networks
- by Tamer Elbatt
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- Wireless Network, Vehicular Network, Fuel economy, wireless ATM links
- by Sangeetha .P
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- Distributed Computing, Time Synchronization, Wireless Network, Network Performance
- by Oliver Hahm and +1
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- Wireless Sensor Networks, Internet of Things, Internet Routing Protocol, Mobile Communication
- by amjad umar
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- Information Retrieval, Middleware, Virtual Enterprise, Client Server
- by Nick Van Helleputte
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- Energy Consumption, Impulse Radio, Power Consumption, Power Supply
- by Mst. Najnin Sultana
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- Distributed Computing, Smart Antenna, Wireless Systems, Space Technology

With the widespread growth of applications of Wireless Sensor Networks (WSNs), the need for reliable security mechanisms these networks has increased manifold. Many security solutions have been proposed in the domain of WSN so far. These solutions are usually based on well-known cryptographic algorithms. In this paper, we have made an effort to survey well known security issues in WSNs and study the behavior of WSN nodes that perform public key cryptographic operations. We evaluate time and power consumption of public key cryptography algorithm for signature and key management by simulation. Keywords—Wireless Sensor Networks, Security, Public Key Cryptography, Key Management.

- by georgios ellinas
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- Technology, Wireless Systems, Radio over fiber, Integrated Optics
- by Lyes Khelladi
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- Distributed Computing, Mobile Ad Hoc Network, Intrusion Detection, Key Management

The adoption of wireless sensor networks by applications that require complex operations, ranging from health care to industrial monitoring, has brought forward a new challenge of fulfilling the quality of service (QoS) requirements of these applications. However, providing QoS support is a challenging issue due to highly resource constrained nature of sensor nodes, unreliable wireless links and harsh operation environments.

- by Ozlem Incel
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- Engineering, Technology, Computer Networks, Health Care

Mobile ad hoc networks (MANETs) are a set of mobile nodes which are self-configuring and connected by wireless links automatically as per the defined routing protocol. The absence of a central management agency or a fixed infrastructure is a key feature of MANETs. These nodes communicate with each other by interchange of packets, which for those nodes not in wireless range goes hop by hop. Due to lack of a defined central authority, securitizing the routing process becomes a challenging task thereby leaving MANETs vulnerable to attacks, which results in deterioration in the performance characteristics as well as raises a serious question mark about the reliability of such networks. In this paper we have attempted to present an overview of the routing protocols, the known routing attacks and the proposed countermeasures to these attacks in various works.

A feature-rich second-generation 60-GHz transceiver chipset is introduced. It integrates dual-conversion superheterodyne receiver and transmitter chains, a sub-integer frequency synthesizer, full programmability from a digital interface, modulator and demodulator circuits to support analog modulations (e.g. MSK, BPSK), as well as a universal I&Q interface for digital modulation formats (e.g. OFDM). Achieved performance includes 6-dB receiver noise figure and 12 dBm transmitter output ldB compression point. Wireless link experiments with different modulation formats for 2-Gb/s real-time uncompressed HDTV transmission are discussed. Additionally, recent millimeter-wave package and antenna developments are summarized and a 60GHz silicon micromachined antenna is presented.

- by Scott Reynolds
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- Digital Modulation, Real Time, Frequency Synthesizer, Integrated Circuit

Internet-enabled wireless devices continue to proliferate and are expected to surpass tradition-al Internet clients in the near future. This has opened up exciting new opportunities in the mobile e-commerce market. However, data secu-rity... more

- by Sumit Gupta
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- Computer Science, Distributed Computing, Internet Security, Cryptography
- by Adam Champion
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- Open Access, Wireless Network, Wireless Network Security, Data Encryption
- by Pietro Camarda
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- Interactive Multimedia, Video Streaming, Videoconference, Quality of Service
- by Antonis Alexiou
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- Performance Evaluation, Mobile Internet, Cellular Network, Bit Error Rate
- by Liam Barry
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- Radio over fiber, Millimeter Wave Antennas, Switching, Antenna
- by Massimo Pozzoni and +1
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- Low Power, Low noise amplifier, Noise Figure, wireless ATM links
- by Ayon Chakraborty
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- Engineering, Genetics, Cognitive Science, Computer Science
- by Matheus Estimer
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- Biomedical Engineering, Hybrid Systems, Wireless Sensor Networks, Digital Control
- by Arthur van Roermund
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- Wireless Sensor Networks, Algorithm, Circuit Complexity, Spread Spectrum
- by Rodolfo Valenzuela M
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- Statistics, Vehicle Dynamics, Stability, Beamforming
- by Nick Van Helleputte
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- Impulse Radio, Power Consumption, Circuit Design, Energy efficient
- by Paul Bottomley
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- Engineering, Algorithms, Spine, Magnetic Resonance Imaging
- by B. Hochwald
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- Channel Coding, Optimization, Antenna arrays, Antenna Theory
- by maysam maysam
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- Radio Frequency Identification, Radio Frequency, Bit Error Rate, Smartcard
- by Carlos Couto
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- Electronics, Power Management, Smart Textiles, Sensor networks

Due to the advent of the Internet, electronic business transactions have exploded around the globe. Along with the Internet, wireless technology has exponentially developed as well. Today, new technologies that allow mobile (cellular) phones and other handheld devices to access the Internet have made wireless business transactions possible. This phenomenon is known as mobile commerce or M-Commerce. It has been predicted that the number of mobile phones connected to the mobile Internet will exceed the number of Internet-connected PCs before 2007. The mobile phone will therefore become the most prevalent device for accessing the Internet. Several industry analysts predict that Mcommerce will constitute a multibillion dollar business by 2005. However, M-Commerce brings new challenges in providing information security as information travels through multiple networks often across wireless links. What must be done to secure financial transactions via mobile commerce? Generally speaking, M...

- by SANWAR ALI
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- Business, Computer Science, Information Security, Digital Signature

Internet enabled wireless devices continue to proliferate and are expected to surpass traditional Internet clients in the near future. This has opened up exciting new opportunities in the mobile e-commerce market. However, data security and privacy remain major concerns in the current generation of "wireless Web" offerings. All such offerings today use a security architecture that lacks end-to-end security. This unfortunate choice is driven by perceived inadequacies of standard Internet security protocols like SSL (secure sockets layer) on less capable CPUs and low-bandwidth wireless links. This paper presents our experiences in implementing and using standard security mechanisms and protocols on small wireless devices. Our results show that SSL is a practical solution for ensuring end-to-end security of wireless Internet transactions even within todays technological constraints.

- by Thierry Turletti
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- Congestion Control, High Speed, wireless ATM links, Simulation Analysis
- by Khaled Elleithy and +1
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- Cognitive Science, wireless ATM links, Design and Implementation, Unmanned Aerial Vehicle

In 802.11 wireless links with disabled MAC retries, data and ACK packets within a TCP session collide resulting in packet losses. We show in this paper that in this situation, certain popular optimizations of TCP (fast-recovery) worsen... more

- by Sudipta Paul
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- Computer Science, Flow Control, Wireless networks, Wireless Network
- by William A Venezia
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- Remote Sensing, Control, Sensor Arrays, OPERATING SYSTEM
- by Meenakshi Kalra
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- Performance Evaluation, Mobile Ad Hoc Network, Wireless Network, Routing Protocol
- by Marco Antonio
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- Wireless Sensor Networks, Communication Theory, Modulation, Spread Spectrum
- by Martin Bouchard
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- Speech enhancement, Noise reduction, Speech Intelligibility, Auditory System
- by Keon Jang
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- Mobility, Wireless Network, Measurement, Rich Internet Application
- by Luis Alonso
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- Distributed Computing, Queueing theory, Mobile Communication, Delays
- by Michael Zhang
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- Ad Hoc Networks, Auxiliary information, Ad hoc network, Knowledge base
- by Salah AL-MAJEED
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- Business, Video Streaming, Wimax, Video Quality
- by Tin Luu Ngoc
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- Artificial Intelligence, Computational Modeling, Routing, Wireless Sensor Networks
- by Shuangqing Wei
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- wireless ATM links

A complete 3.1-10.6 GHz ultra-wide band receiver using 500 MHz-wide sub-banded binary phase shift keyed (BPSK) pulses has been specified, designed and integrated as a three chip and planar antenna solution. The system includes a custom designed 3.1-10.6 GHz planar antenna, direct-conversion RF front-end, 500 MS/s analog to digital converters, and a parallelized digital back-end for signal detection and demodulation. A 100 Mb/s wireless link has been established with this chipset. A bit-error-rate (BER) of 10-3 was recorded at -80 dBm at a rate of 100 Mb/s for properly acquired packets in the lowest frequency band. Bit-scaling of the ADC from 1 to 5 bits reveals a 4 dB improvement in the link budget

- by johnna powell
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- Bit Error Rate, Chip, Signal Detection, wireless ATM links