Proceedings ArticleDOI
On the performance of ad hoc networks with beamforming antennas
Ram Ramanathan
- pp 95-105
TLDR
A broad-based examination of this potential, focusing on exploiting the longer ranges as well as the reduced interference that beamforming antennas can provide, considers a number of enhancements to a convectional ad hoc network system, and evaluation the impact of each enhancement using simulation.Abstract:
Beamforming antennas have the potential to provide a fundamental breakthrough in ad hoc network capacity. We present a broad-based examination of this potential, focusing on exploiting the longer ranges as well as the reduced interference that beamforming antennas can provide. We consider a number of enhancements to a convectional ad hoc network system, and evaluation the impact of each enhancement using simulation. Such enhancements include "aggressive" and "conservative" channel access models for beamforming antennas, link power control, and directional neighbor discovery. Our simulations are based on detailed modeling on detailed modeling of steered as well as swiched beams using antenna patterns of varying gains, and a realistic radio and propagation model. For the scenarios studied, our results show that beamforming can yield a 28% to 118% (depending upon the density) improvement in throughput, and up to a factor-of-28 reduction in delay. Our study also tells us which mechanisms are likely to be more effective and under what conditions, which in turn identifies areas where future research is neederead more
Citations
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Wireless mesh networks: a survey
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Mobile ad hoc networking: imperatives and challenges
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Journal ArticleDOI
Flying Ad-Hoc Networks (FANETs)
TL;DR: In this paper, Flying Ad-Hoc Networks (FANETs) are surveyed which is an ad hoc network connecting the UAVs, and the main FANET design challenges are introduced.
Proceedings ArticleDOI
Using directional antennas for medium access control in ad hoc networks
TL;DR: The design focuses on using multi-hop RTSs to establish links between distant nodes, and then transmit CTS, DATA and ACK over a single hop, and shows that the directional MAC protocol can perform better than IEEE 802.11, although the performance is dependent on the topology configuration and the flow patterns.
Proceedings Article
Using Directional Antennas to Prevent Wormhole Attacks.
Lingxuan Hu,David Evans +1 more
TL;DR: A cooperative protocol whereby nodes share directional information to prevent wormhole endpoints from masquerading as false neighbors is presented, which greatly diminishes the threat of wormhole attacks and requires no location information or clock synchronization.
References
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Book
Wireless Communications: Principles and Practice
TL;DR: WireWireless Communications: Principles and Practice, Second Edition is the definitive modern text for wireless communications technology and system design as discussed by the authors, which covers the fundamental issues impacting all wireless networks and reviews virtually every important new wireless standard and technological development, offering especially comprehensive coverage of the 3G systems and wireless local area networks (WLANs).
Journal ArticleDOI
The capacity of wireless networks
Piyush Gupta,P. R. Kumar +1 more
TL;DR: When n identical randomly located nodes, each capable of transmitting at W bits per second and using a fixed range, form a wireless network, the throughput /spl lambda/(n) obtainable by each node for a randomly chosen destination is /spl Theta/(W//spl radic/(nlogn)) bits persecond under a noninterference protocol.
Proceedings ArticleDOI
MACAW: a media access protocol for wireless LAN's
TL;DR: This paper studies media access protocols for a single channel wireless LAN being developed at Xerox Corporation's Palo Alto Research Center and develops a new protocol, MACAW, which uses an RTS-CTS-DS-DATA-ACK message exchange and includes a significantly different backoff algorithm.
Optimized Link State Routing Protocol
TL;DR: Urethane prepolymer compositions are made from 1- isocyanato-3-isocyanatomethyl-3,5,5-trimethyl cyclohexane and polyols at a total NCO to OH ratio of at least 1.2:1, and the prepolymers are reacted with cycloaliphatic polyamines to give urea-urethanes.