Applications and Challenges of the 802.11e EDCA Mechanism: An Experimental Study

Albert Banchs, Arturo Azcorra, Carlos García, and Rubén Cuevas

The articles describes experiments wiht 802.11e and outlines the key issues in wlan performance analysis. A serious candidate for our journal club.

A Throughput and Delay Model for IEEE 802.11e EDCA Under Non Saturation

PABLO SERRANO, ALBERT BANCHS and ARTURO AZCORRA

Much more complete/flexible than our proposal, but it is also much more complex too. Their simulations and results agree astonishingly well. I wish I had an implementation/script to compare my results to theirs... maybe I will devote some time to further understand their proposal and program a solver.

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Throughput analysis and optimal configuration of 802.11e EDCA

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Albert Banchs , Luca Vollero

At a first glanze, it seemed to me that this paper was irrelevant for my research, since it considers only non-real time traffic. However, the initial description of EDCA provided a piece of information that I was missing until now, which is that the PLCP preamble includes a NAV value accounting for the transmission of the data plus the ack. That means that the rest of the stations will remain silent for that period of time... even if there is a collision and no ack is sent!!!

Summarizing, there are some formulae that might be wrong in my WONS paper. What should I do now?

NIHO: Network Initiated Handovers for next generation ALL IP Networks

Telemaco Melia,Rui Aguiar,Albert Bacnhs, Piotr Pacyna

The paper describes a demo at Barcelona's Infocom in which the network is in charge of initiating handovers in order to better distribute the load among APs, and satisfy the QoS requirements of all nodes.

Pervasiveness in a Competitive Multi-Operator Environment: The Daidalos Project

Rui L. Aguiar, Amardeo Sarma, Dennis Bijwaard, Loris Marchetti, Piotr Pacyna, Ricardo Pascotto

Describes de Daidalus european project which describes a beyond-IMS scenario. In this scenario the services will be created by autonomous service providers and will be discoverable and aggregable. Billing will happen seamlessly. Wireless operators will increase their collaboration to extend availability. The user will appear the network and the services as more intelligent, context-aware and adapted to its profile.

A Fair MAC Protocol for IEEE 802.11-Based Ad Hoc Networks: Design and Implementation

Bensaou, B. Member, Z.F.
Senior Member;

It is an extension of a paper from the same authors back in 2000. It repeats the theoretical framework and proposes some "practical" implementation guidelines.