Previous
Wireless LANs - Standards and security
News In an ad hoc mode, the wireless network card is configured to talk with other wireless network access cards that are within its range. They can act in an ad hoc mode, as in client-to-client, or in a pure client-to-access point mode.
[May 8, 2002, 9:42]
Ad Hoc UAV Ground Network (AUGNet)
White Papers This paper describes an implementation of a wireless mobile ad hoc network with radio nodes mounted at fixed sites, on ground vehicles, and in small (10kg) UAVs. In the first, the UAV acts as a prominent radio node that connects disconnected ground...
[March 2, 2009, 20:51]
Message Ferrying: Proactive Routing in Highly-Partitioned Wireless Ad Hoc Networks
White Papers Due to node mobility, limited radio power, node failure and wide deployment area, ad hoc networks are often vulnerable to network partitioning. An ad hoc network allows devices with wireless interfaces to communicate with each other without any...
[August 25, 2007, 1:00]
MMSN: Multi-Frequency Media Access Control for Wireless Sensor Networks
White Papers In wireless sensor networks, each device is typically equipped with a single radio transceiver and applications adopt much smaller packet sizes compared to those in general wireless ad hoc networks. Multi-frequency media access control has been...
[August 25, 2007, 1:00]
Bluetooth: Threats and Security Measures
White Papers Bluetooth is an open industry standard for the unlicensed short-range radio communication of voice and data between IT devices, eliminating any need for wires and cables and permitting ad hoc networking.
[March 16, 2009, 4:06]
How to Outperform IEEE 802.11: Interference Aware (IA) MAC
White Papers They are mostly based on IEEE 802.11 protocol which is known to show low performance in ad hoc networks. Also when infrastructured networks (many access points are placed) are considered, a single transmission could block many radio cells.
[May 12, 2006, 0:00]
Performance Evaluation of Multiple-Rate Mobile Ad Hoc Networks
White Papers This paper presents a simulation study on the performance of multiple-rate mobile ad hoc networks (MANETs), based on an evolved ns-2 simulator. At the physical layer, realistic models such as Walfisch-Ikagami radio propagation model and lognormal...
[July 20, 2007, 1:00]
Performance Issues With IEEE 802.11 in Ad Hoc Networking
White Papers Thus, studies in wireless multi-hop networks, also called ad hoc networks often rely on the use of the IEEE 802.11 standard for the physical and MAC layers. But, since a couple of years, the use of 802.11 in ad hoc networks has been discussed.
[July 20, 2007, 6:07]
Architecture and Algorithms for an IEEE 802.11-Based Multi-Channel Wireless Mesh Network
White Papers Even though multiple non-overlapped channels exist in the 2.4GHz and 5GHz spectrum, most IEEE 802.11-based multi-hop ad hoc networks today use only a single channel. As a result, these networks rarely can fully exploit the aggregate bandwidth...
[October 20, 2005, 0:00]
Medium Access Control in Mobile Ad Hoc Networks: Challenges and Solutions
White Papers Mobile Ad hoc NETworks (MANETs) are useful in environment where fixed network infrastructure is unavailable. However, characteristics of MANETs such as radio link vulnerability, mobility, limited power pose great challenges on MAC design.
[March 2, 2009, 20:53]
A Dynamic and Distributed Scatternet Formation Protocol for Real-Life Bluetooth Scatternets
White Papers Several such piconets can be interconnected into a scatternet to form a wireless ad hoc network. Bluetooth is a universal radio interface for short-range wireless networks. The basic Bluetooth network topology is a single-hop star-shaped piconet.
[September 29, 2005, 3:00]
Standards-Based Radio Networks: Improve Tactical Integration
White Papers Finally, network routers and radios must be able to form ad hoc networks with minimal configuration or changes. New software-defined radios allow a single radio to operate with multiple waveforms to provide a wide range of capabilities depending on...
[August 30, 2009, 1:22]
An Intrusion Detection Tool for AODV-Based Ad Hoc Wireless Networks
White Papers Mobile ad hoc network routing protocols are highly susceptible to subversion. This paper discusses some of the threats to wireless ad hoc networks, and, specifically, some attacks against the AODV routing protocol.
[August 10, 2007, 11:30]
IRMA: Integrated Routing and MAC Scheduling in Multi-Hop Wireless Mesh Networks
White Papers The IRMA approach is motivated by the fact that conventional contention-based MAC protocols such as 802.11 do not perform well in combination with independent ad hoc routing protocols such as DSR, DSDV or AODV due to interactions between...
[August 23, 2007, 1:00]
Video Streaming Over Bluetooth: A Survey
White Papers In recent years, wireless ad hoc networks have been a growing area of research. However, current Bluetooth network is not suitable for traditional media encoding and real-time transmission due to limited bandwidth, high degree of error rates, and...
[September 20, 2005, 3:00]
Hybrid Mesh Ad-Hoc On-Demand Distance Vector Routing Protocol
White Papers WMNs can be considered as a super-set of traditional Mobile Ad-hoc NETworks (MANETs), where the network is comprised of mobile client de-vices (MESH CLIENTs). Such hybrid WMNs is characterized by a high level of heterogeneity, since static MESH...
[August 13, 2007, 15:14]
On the Scalability of Hierarchical Hybrid Wireless Networks
White Papers The network under consideration, which arises in mesh networking scenarios such as 802.11s, aims to achieve better capacity than ad hoc networks without infrastructure support, and also reduces the investment on wired infrastructure.
[August 23, 2007, 1:00]
Implementing Voice Over Wireless Networks: Realities and Challenges
White Papers The cold reality is that ad-hoc design methods and site surveys are insufficient for wireless networks supporting high volume applications. Making matters worse, Radio Frequency (RF) interference, RF noise, and the physical environment dramatically...
[May 31, 2008, 1:01]
Bluetooth shipments take off
News It is more efficient for an ad hoc connection, but isn't ideal for a wireless network in an office. Analysts projected that chipset shipments of Bluetooth, the short-range radio technology for connecting PCs, consumer gadgets and peripherals, will...
[December 3, 2001, 13:33]
Rupert Goodwins' Diary
Blog Everyone becomes their own little hotspot, and ad-hoc networks fan out across a city like umbrellas opening in the rain. Radio hams are prone to complain that all this new digital stuff is filling the airwaves with so much crud they can't hear each...
[June 14, 2002, 18:19]
