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A Survey Of MAC Protocols For Ad Hoc Networks And IEEE 802.11
White Papers This paper explains limitations of the IEEE 802.11 standard and most of the typical problems in ad hoc networks where the standard is applied. The paper is a compendium of knowledge about problems and new approaches in ad hoc networks.
[July 9, 2007, 0:00]
Quality Of Service Aware MAC Based On IEEE 802.11 For Multihop Ad-Hoc Networks
White Papers Quality of Service (QoS) support for such applications in mobile ad hoc networks (MANETs) requires acceptable channel conditions, QoS-aware mechanisms for channel access, identification of proper forwarding (transit) nodes, as well as measures for...
[October 20, 2005, 0:00]
IEEE 802.11b Wireless LAN: Engineered Design Versus Ad Hoc Approach
White Papers Because of the low equipment cost for wireless fidelity APs (access points), the legitimate question arises: Is it worthwhile spending money to engineer the number of APs needed to cover an office area, or is it more cost effective to estimate the...
[October 20, 2005, 0:00]
SSCH: Slotted Seeded Channel Hopping For Capacity Improvement In IEEE 802.11 Ad-Hoc Wireless Networks
White Papers This paper presents a link-layer protocol called Slotted Seeded Channel Hopping, or SSCH, that increases the capacity of an IEEE 802.11 network by utilizing frequency diversity. SSCH can be implemented in software over an IEEE 802.11-compliant...
[January 10, 2006, 23:00]
IEEE 802.11 Performance In An Ad-Hoc Environment
White Papers IEEE 802.11 is the new standard for communication in a wireless LAN. Its need arose from the many differences between traditional wired and wireless LANs. This paper briefly introduces the protocol and presents the results of the simulation of the...
[February 7, 2006, 23:00]
Enhancements Of The IEEE 802.11, A MAC Protocol For Ad Hoc Network With History Of Power Adjustment
White Papers This paper proposes a MAC protocol which improves disadvantages of the IEEE 802.11 DCF standard, like the blocking problem, scheduling concurrent transmissions (the hidden and exposed problem). Through many simulations, it shows that the algorithm...
[March 24, 2008, 23:00]
Benefits Of Packet Aggregation In Ad-Hoc Wireless Network
White Papers Emerging mesh networks build on IEEE 802.11 wireless local area networking technology to deliver Internet access to mobile users or to areas where traditional wired access technologies are unprofitable.
[May 12, 2006, 0:00]
A MAC Protocol For Wireless Ad Hoc Networks With Power Control
White Papers IEEE 802.11 has become the standard for Wireless LAN's both in infrastructure and in ad hoc mode, although originally it was developed for a single access point scenario. Probably this is the main reason for many problems and limitations arising in...
[February 7, 2006, 23:00]
Multipath Routing And Multiple Description Coding In Ad-Hoc Networks: A Simulation Study
White Papers This paper presents a simulation study of the combination of MDC and multipath routing from a network perspective with a realistic medium access control protocol (IEEE 802.11) and a widely used routing protocol.
[May 12, 2006, 0:00]
Media Streaming Performance In A Portable Wireless Classroom Network
White Papers This paper presents empirical measurements of wireless media streaming traffic in an IEEE 802.11b wireless ad hoc network. The results show that the IEEE 802.11b WLAN can support up to 8 clients with good media streaming quality, with each client...
[May 10, 2006, 0:00]
Improving Ad Hoc Routing For Future Wireless Multihop Networks
White Papers Therefore the performance of Ad Hoc Routing using IEEE 802.11a turned out to be unexpected inefficient. This paper presents a new concept to improve Ad Hoc Routing Protocols exploiting IEEE 802.11a Link Adaptation capabilities.
[June 30, 2006, 0:00]
Architecting A High-Capacity Last-Mile Wireless Mesh Network
White Papers Despite availability of multiple non-overlapping channels in the 2.4GHz and the 5GHz spectrum, most IEEE 802.11-based multi-hop ad hoc networks operate in a single channel. This paper describes novel multi-channel WMN architecture, called Hyacinth...
[June 30, 2006, 0:00]
An Experimental Study Of VoIP Multicast In 802.11b Ad-Hoc Networks
White Papers This paper presents experimental studies on the use of IEEE 802.11b wireless Ad Hoc networks for Multicast. The experiments show that the maximal throughput achievable in such networks is 1.76 Mbps for an 802.11 Data Rate of 2 Mbps.
[October 20, 2005, 0:00]
Improving The Performance Of TCP In The Presence Of Interacting UDP Flows In Ad Hoc Networks
White Papers This paper studies how fairness affects the performance of TCP over ad hoc networks with IEEE 802.11 at the MAC layer. The problem addressed is that the throughput of TCP flows degrades severely in the presence of heavily loaded UDP flows.
[January 14, 2008, 23:00]
A Medium Access Control Protocol With Retransmission Using NACK And Directional Antennas For Broadcasting In Wireless Ad-Hoc Networks
White Papers To improve the throughput performance keeping high reliable broadcasting, the paper proposes an efficient Medium Access Control protocol for broadcasting in wireless ad-hoc networks with IEEE 802.11. In the proposed protocol, to reduce the number...
[June 30, 2006, 0:00]
Improving Performance Of Wireless Ad Hoc Networks Using A Few Point-to-Point Links
White Papers The current wireless technologies such as IEEE 802.11 (Wi-Fi) make ad hoc networking viable for small regions involving a few tens of mobile nodes, but such networks are unreliable. This paper investigates the benefits of adding a few...
[July 31, 2007, 0:00]
Performance Of Reliable Transport Protocol Over IEEE 802.11 Wireless LAN: Analysis And Enhancement
White Papers IEEE 802.11 Medium Access Control (MAC) is proposed to support asynchronous and time bounded delivery of radio data packets in infrastructure and ad hoc networks. The basis of the IEEE 802.11 WLAN MAC protocol is Distributed Coordination Function...
[December 6, 2007, 23:00]
Network Measurements Of A Wireless Classroom Network
White Papers Experiments are conducted on an ad hoc IEEE 802.11b wireless LAN, using a wireless-enabled ApacheWeb server, several wireless clients, and a wireless network analyzer. The advent of mobile computers and wireless networks enables the deployment of...
[May 10, 2006, 0:00]
QoS Extensions To Mobile Ad Hoc Routing Supporting Real-Time Applications
White Papers This paper analyzes and evaluates some Quality of Service (QoS) extensions to ad hoc routing in IEEE 802.11 wireless mobile ad hoc networks from the aspects of real-time applications. Mobile Ad hoc NETworks (MANETs), temporarily created by mobile...
[May 10, 2006, 0:00]
Initial Experiences In Building An Ad-Hoc Test Network
White Papers In this paper, the principles of such networks are presented along with advantages and disadvantages of using IEEE 802.11b and Bluetooth as wireless access in ad-hoc networks. Mobile ad-hoc networks are self-organized networks of mobile nodes with...
[November 17, 2005, 23:00]
