Isolation of wireless ad hoc medium access mechanisms under TCP

Tang, Ken; Corrêa, Maria Clara Medina; Geria, M.

doi:10.1109/icccn.1999.805499

Cited by 8 publications

(11 citation statements)

References 7 publications

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“…Moreover, none of these papers present the effect of available buffer at the base station and the interaction of 802.11 MAC protocol on the user level unfairness observed at the TCP layer. Research on interaction of TCP over 802.11 based ad hoc networks [14], [4], [15] has taken factors such as mobility and multiple hops into account. However, the unfairness problems in 802.11 based WLAN installations arising due to buffer size availability has neither been studied nor observed before.…”

Section: Related Workmentioning

confidence: 99%

Understanding TCP fairness over wireless LAN

Pilosof

Ramjee²,

Raz

et al. 2003

IEEE INFOCOM 2003. Twenty-Second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37

260

227

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Abstract-As local area wireless networks based on the IEEE 802.11 standard see increasing public deployment, it is important to ensure that access to the network by different users remains fair. While fairness issues in 802.11 networks have been studied before, this paper is the first to focus on TCP fairness in 802.11 networks in the presence of both mobile senders and receivers. In this paper, we evaluate extensively through analysis, simulation, and experimentation the interaction between the 802.11 MAC protocol and TCP. We identify four different regions of TCP unfairness that depend on the buffer availability at the base station, with some regions exhibiting significant unfairness of over 10 in terms of throughput ratio between upstream and downstream TCP flows. We also propose a simple solution that can be implemented at the base station above the MAC layer that ensures that different TCP flows share the 802.11 bandwidth equitably irrespective of the buffer availability at the base station.

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Section: Related Workmentioning

confidence: 99%

Understanding TCP fairness over wireless LAN

Pilosof

Ramjee²,

Raz

et al. 2003

IEEE INFOCOM 2003. Twenty-Second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37

260

227

View full text Add to dashboard Cite

show abstract

“…In the following, as an example of a dynamically variable system, we focus on a wireless multi-hop Mobile Ad Hoc Network (MANET) [17,35]. Simulation models for wireless systems incarnate the assumptions that motivated our design.…”

Section: A Case Study Of a Dynamic Modelmentioning

confidence: 99%

“…Topology changes due to simulated hosts' mobility map on causality effects in the "areas of influence" of each mobile device, resulting in dynamically shaped causalitydomains and component interaction schemes. Given two or more neighbor-hosts sharing the wireless medium, the causal effect of signal interference could result in a chain of local-state events up to the high protocols' layers [35]. In our approach, we define a model entity as the data structure defined to model a Simulated Mobile Host (SMH).…”

Section: A Case Study Of a Dynamic Modelmentioning

confidence: 99%

“…transmissions) between neighbor hosts [17,35]. Under the modeling and simulation viewpoint, wireless systems can be considered highly dynamic systems: if a SMH changes its position, it will eventually interact with a new community of neighbor hosts.…”

Section: A Case Study Of a Dynamic Modelmentioning

confidence: 99%

“…Examples of models challenging currently available simulation systems and tools range from large-scale wireless systems, like cellular, mobile ad hoc and sensor networks, up to biology-inspired models and molecular systems, elementary particles physics and cosmology systems [17,19,20,24,26,31,35,36,37,39]. The simulation-based investigation of complex systems is This work is supported by MIUR FIRB funds, under the project: "Performance Evaluation of Complex Systems: Techniques, Methodologies and Tools" widely adopted and it is often preferred, in practice, to the mathematical intractability and critical model-complexity of alternative numerical and analytical resolution methods [17,25,30,31,35]. Simulation models currently considered interesting for the analysis may include a potentially huge number of simulated objects.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Adaptive Middleware for Parallel and Distributed Simulation of Dynamically Interacting Systems

Bononi

Bracuto

D’Angelo

et al.

Eighth IEEE International Symposium on Distributed Simulation and Real-Time Applications

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Forward focus: using routing information to improve medium access control in ad hoc networks

Ishibashi

Boutaba

2006

Wireless Communications

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Multihop packet forwarding is a vital process in an ad hoc network. All ad hoc networking protocols, but particularly routing and medium access control protocols, must work together in order for the network to be successful. However, current MAC protocols such as IEEE 802.11 do not consider this multihop nature at all. This work develops a modification to 802.11 that focuses on forwarding packets. Routing information is utilized to streamline the sharing of the medium, by allowing forwarding nodes to reuse an already-acquired channel. Using forward focus (FF), nodes are encouraged to participate in the forwarding process and are rewarded for doing so. Simulation-generated performance evaluations reveal that the result is a MAC protocol with improved efficiency and effectiveness.

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Isolation of wireless ad hoc medium access mechanisms under TCP

Cited by 8 publications

References 7 publications

Understanding TCP fairness over wireless LAN

Understanding TCP fairness over wireless LAN

A New Adaptive Middleware for Parallel and Distributed Simulation of Dynamically Interacting Systems

Forward focus: using routing information to improve medium access control in ad hoc networks

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