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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]
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]
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]
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]
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]
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]
Increasing Fairness And Efficiency Using The MadMac Protocol In Ad Hoc Networks
White Papers The IEEE 802.11 MAC layer is known for its unfairness behavior in ad hoc networks. It is still a real challenge to design a fair MAC protocol for ad hoc networks that is distributed, topology independent, that relies on no explicit information...
[May 30, 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]
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]
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]
Transmission Power Control In Wireless Ad Hoc Networks: Challenges, Solutions, And Open Issues
White Papers The Ad Hoc mode of the IEEE 802.11 standard is, by far, the most dominant MAC protocol for ad hoc networks. Recently, power control in mobile ad hoc networks has been the focus of extensive research. Its main objectives are to reduce the total...
[April 21, 2006, 0:00]
ICAM: Integrated Cellular And Ad-Hoc Multicast
White Papers The proxy then forwards the packets to the receivers through an IEEE 802.11-based ad-hoc network. This paper proposes ICAM, Integrated Cellular and Ad-hoc Multicast, to increase 3G multicast throughput through opportunistic use of ad-hoc relays.
[December 12, 2006, 23:00]
Extended Abstract: Understanding The Effect Of Access Point Density On Wireless LAN Performance
White Papers This paper presents a systematic experimental study of the effect of inter-cell interference on IEEE 802.11 performance. With increasing penetration of WiFi into residential areas and usage in ad hoc conference settings, chaotic un-planned...
[December 5, 2007, 23:00]
Centralized Channel Assignment And Routing Algorithms For Multi-Channel Wireless Mesh Networks
White Papers The IEEE 802.11 Wireless LAN standards allow multiple non-overlapping frequency channels to be used simultaneously to increase the aggregate bandwidth available to end-users. However, bandwidth aggregation is rarely used in the context of multi-hop...
[June 30, 2006, 0:00]
Searching Local Information In Mobile Databases
White Papers A Mobile Ad-hoc NETwork (MANET) is a set of moving objects that communicate with each other via unregulated, short-range wireless technologies such as IEEE 802.11, Bluetooth, or Ultra Wide Band (UWB).
[June 30, 2006, 0:00]
A Short Look On Power Saving Mechanisms In The Wireless LAN Standard Draft IEEE 802.11
White Papers This paper describes simulations of the power saving mechanism of the upcoming standard for wireless Local Area Networks IEEE 802.11. Simulations were made for a ad-hoc-network with 8 stations. They were performed in order to see how typical...
[December 6, 2007, 23:00]
UCAN: Unified Cellular And Ad-Hoc Network
White Papers In UCAN, a mobile client has both 3G cellular link and IEEE 802.11-based peer-to-peer links. This paper proposes the Unified Cellular and Ad-Hoc Network (UCAN) architecture for enhancing cell throughput, while maintaining fairness.
[January 10, 2006, 23:00]
