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TCP Unfairness In Ad Hoc Wireless Networks And A Neighborhood RED Solution
White Papers Significant TCP unfairness in ad hoc wireless networks has been reported during the past several years. This unfairness results from the nature of the shared wireless medium and location dependency. If a node is viewed and its interfering nodes to...
[December 4, 2007, 23:00]
Effects Of Multipath Routing On TCP Performance In Ad Hoc Networks
White Papers In mobile ad hoc networks, one might expect multipath routing to provide some robustness to link failures and facilitate the transmission of packets along paths that avoid regions of congestion. This paper considers TCP goodput as the metric of...
[January 14, 2008, 23:00]
Improving TCP Performance In Ad Hoc Networks Using Signal Strength Based Link Management
White Papers Mobility in ad hoc networks causes frequent link failures, which in turn causes packet losses. TCP attributes these packet losses to congestion. This incorrect inference results in frequent TCP retransmission time-outs and therefore degradation in...
[January 14, 2008, 23:00]
Alleviating Effects Of Mobility On TCP Performance In Ad Hoc Networks Using Signal Strength Based Link Management
White Papers Mobility in ad hoc networks causes link failures, which in turn result in packet losses. TCP attributes these losses to congestion. This results in frequent TCP retransmission timeouts and degradation in TCP performance even at light loads.
[January 14, 2008, 23:00]
Analysis Of TCP Performance On Ad Hoc Networks Using Preemptive Maintenance Routing
White Papers In mobile Ad hoc networks, the topology of the network is constantly changing as nodes move in and out of each others range, breaking and establishing links. TCP performs poorly in such networks because packets that are lost due to path...
[January 14, 2008, 23:00]
An Edge-Based Approach For Improving TCP In Wireless Mobile Ad Hoc Networks
White Papers The Transmission Control Protocol (TCP) experiences severe performance degradation within wireless mobile ad hoc networks. The main reason is that the regular TCP does not discriminate packet losses due to medium error and disconnection (mobility...
[December 6, 2007, 23:00]
Hidden Terminal Analysis On TCP Stability Over Multihops Ad Hoc Networks
White Papers The goodput of TCP flow over multihops ad hoc networks varies enormously with the increase of hops number between the sender and receiver. This jitter leads to the TCP instability and impediments the web applications in multihops ad hoc networks.
[January 8, 2008, 23:00]
Balancing Throughput And Fairness For TCP Flows In Multihop Ad-Hoc Networks
White Papers Analyzing transport layer operation and enhancing its performance over multihop ad hoc networks have attracted a lot of attentions. Although the fundamental reasons for the performance degradation of TCP have been studied for many years, the tight...
[January 8, 2008, 23:00]
Performance Evaluation Of TCP Over Routing Protocols For Mobile Ad Hoc Networks
White Papers This paper investigates the performance of TCP of various (single-hop and multi-hop) routing protocols for mobile ad hoc networks. Using ns-2, it evaluates the TCP window size, throughput and packet delay over a single TCP connection.
[December 26, 2007, 23:00]
Interaction Between TCP And UDP Flows In Wireless Multi-Hop Ad Hoc Networks
White Papers This paper examines the interaction between TCP and UDP flows in wireless multi-hop ad hoc networks. The interaction between TCP and UDP flows are examined experimentally in simple scenarios, involving between three and four nodes.
[December 26, 2007, 23:00]
A Cross Layer Analysis Of TCP Instability In Multihop Ad Hoc Networks
White Papers It is well-known that due to the nature of some ad hoc network applications (e.g.emergency operation, battlefield communication), TCP instability can have a devastating impact on the Quality of Service requirements.
[December 26, 2007, 23:00]
TCP Adaptive RTO To Improve TCP Performance In Mobile Ad Hoc Networks
White Papers This paper proposes a new mechanism called TCP Adaptive RTO (TCP AR) that improves TCP performance in mobile ad hoc network s. In a mobile ad hoc network, temporary link failures and route changes occur frequently.
[December 26, 2007, 23:00]
Experimental Evaluation Of TCP Performance In Multi-Hop Wireless Ad Hoc Networks
White Papers This paper presents experimental measurements of TCP bulk data transfer performance in a multi-hop wireless ad hoc network environment. The first part of the paper studies how TCP throughput is affected by AODV routing, user mobility, and the...
[December 26, 2007, 23:00]
Interactions Between TCP, UDP And Routing Protocols In Wireless Multi-Hop Ad Hoc Networks
White Papers Furthermore, when both TCP and UDP share some hops in an ad hoc network there is a complex interaction between the transport protocols as well as with the routing protocol. The achieved throughput in an ad hoc network is affected by many factors...
[December 26, 2007, 23:00]
Improvement Of TCP Throughput By Combination Of Data And ACK Packets In Ad Hoc Networks
White Papers Since a radio channel is shared among terminals in an ad hoc network, packet collisions are frequent. In case of transmitting packets especially using TCP, data and ACK packets are transmitted in opposite directions on the same radio channel.
[January 14, 2008, 23:00]
Data Link Layer Control Methods For Performance Improvement Of TCP Over An Ad Hoc Network
White Papers In order to increase TCP performance in an ad hoc network, support from the lower layers of the transport layer is required. Although retransmission by the data link layer is generally required for errors on a wireless channel in ad hoc networks...
[December 20, 2007, 23:00]
TCP Over Geo-Routing For High Mobility: Vehicle Grids And Airborne Swarms
White Papers However, TCP performs poorly in mobile ad hoc networks, mainly because of route breakage. Ad hoc wireless networks have become the architecture of choice for peer to peer communications in areas where the telecommunications infrastructure is...
[December 5, 2007, 23:00]
TCP Behavior Across Multihop Wireless Networks And The Wired Internet
White Papers However, recent experiments with ad hoc, multihop 802.11 networks have exposed serious instabilities when TCP connections span both wired and wireless domains. Emerging wireless ad hoc networks find their most important applications in untethered...
[December 6, 2007, 23:00]
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]
Empirical Upper Bound On TCP Transmission Rate For Guaranteed Capture-Free Communications In Multi-Hop IEEE 802.11 Based Wireless Networks
White Papers This paper considers the well known problem of TCP capture in mobile ad hoc networks, which is an unfair distribution of network bandwidth between TCP flows. The conventional way of analysis of TCP performance in wireless networks is to consider...
[December 26, 2007, 23:00]
