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Minimum delay Data Gathering in Radio Networks

Jean-Claude Bermond 1 Nicolas Nisse 1 Patricio Reyes 1 Hervé Rivano 2 
1 MASCOTTE - Algorithms, simulation, combinatorics and optimization for telecommunications
CRISAM - Inria Sophia Antipolis - Méditerranée , Laboratoire I3S - COMRED - COMmunications, Réseaux, systèmes Embarqués et Distribués
2 SWING - Smart Wireless Networking
Inria Grenoble - Rhône-Alpes, CITI - CITI Centre of Innovation in Telecommunications and Integration of services
Abstract : The aim of this paper is to design efficient gathering algorithms (data collection) in a Base Station of a wireless multi hop grid network when interferences constraints are present. We suppose the time is slotted and that during one time slot (step) each node can transmit to one of its neighbours at most one data item. Each device is equipped with a half duplex interface; so a node cannot both receive and transmit simultaneously. During a step only non interfering transmissions can be done. In other words, the non interfering calls done during a step will form a matching. The aim is to minimize the number of steps needed to send to the base station a set of messages generated by the nodes, this completion time is also denoted makespan of the call scheduling. The best known algorithm for open-grids was a multiplicative 1.5-approximation algorithm [Revah, Segal 07]. In such topologies, we give a very simple +2 approximation algorithm and then a more involved +1 approximation algorithm. Moreover, our algorithms work when no buffering is allowed in intermediary nodes, i.e., when a node receives a message at some step, it must transmit it during the next step.
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Submitted on : Saturday, September 3, 2022 - 4:23:10 PM
Last modification on : Friday, November 4, 2022 - 3:12:05 PM
Long-term archiving on: : Sunday, December 4, 2022 - 6:16:34 PM


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Jean-Claude Bermond, Nicolas Nisse, Patricio Reyes, Hervé Rivano. Minimum delay Data Gathering in Radio Networks. ADHOC-NOW 2009 - 8th international conference on Ad Hoc Networks and Wireless, Sep 2009, Murcia, Spain. pp.69-82, ⟨10.1007/978-3-642-04383-3_6⟩. ⟨inria-00505522⟩



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