A Totally Distributed Fair Scheduler for Population Protocols by Randomized Handshakes

  • N. Ouled Abdallah
  • M. Jmaiel
  • M. Mosbah
  • A. Zemmari
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9399)


A population protocol is a computational model based on pairwise interactions and designed for networks of passively mobile finite state agents. In the population protocol model, and also in the models that extend it, the interacting pairs are supposed to be chosen by a theoretical fair scheduler. In this paper, we present the HS Scheduler which is a totally distributed synchronous randomized handshake procedure. We then prove that this randomized handshake procedure can be a probabilistic consistent scheduler for population protocols that is fair with probability 1. By adopting a protocol aware version of the HS Scheduler, we introduce the iterated population protocols model where nodes can stop participating in the protocol’s computation once they reach a final state. We then study the time complexity of the computation of a particular case of this model where a final state is reached in only one computation step. We present some upper bounds that are later validated by simulations results.


Population protocol Distributed randomized handshake Probabilistic fair scheduler Iterated population protocol 


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • N. Ouled Abdallah
    • 1
    • 2
  • M. Jmaiel
    • 2
    • 3
  • M. Mosbah
    • 1
  • A. Zemmari
    • 1
  1. 1.LaBRIUniversity of Bordeaux - CNRSTalenceFrance
  2. 2.ReDCAD LaboratoryUniversity of Sfax, National School of Engineers of SfaxSfaxTunisia
  3. 3.Research Center for Computer Science, Multimedia and Digital Data Processing of SfaxSfaxTunisia

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