By Topic

An Integrated Scheduling and Retransmission Proposal for Firm Real-Time Traffic in IEEE 802.11e

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Demarch, D.D. ; Fed. Univ. of Santa Catarina, Santa Catarina ; Becker, L.B.

This work investigates the problem of scheduling network resources in the context of a cooperative mobile multi-robot system that exchanges messages with firm real-time constraints using a wireless network compliant with the recently created IEEE 802.11e amendment. Given the physical characteristics of wireless communication, message retransmission becomes a crucial issue, especially in a realtime application. Experiments performed in the context of this work show that the regular approach for retransmission proposed in the IEEE 802.11e is not suitable for real-time applications that require a certain level of reliability. To tackle this problem, the current work proposes a new mechanism called Integrated Scheduling and Retransmission Approach (ISRA) that integrates messages scheduling and retransmission in a unified manner at the MAC layer. Our proposal is able to deal with residual transmission errors and thereby increases the reliability level of the real-time messages. Our approach is evaluated through simulations for different scenarios of traffic load and compared with the standard approach of the 802.11e for scheduling and retransmission of real-time messages. Obtained results show that ISRA presents a high adaptability and does not get affected by variations in the network load or topology.

Published in:

Real-Time Systems, 2007. ECRTS '07. 19th Euromicro Conference on

Date of Conference:

4-6 July 2007