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Broadcasting multiple messages in the 1-in port model in optimal time

Author

Listed:
  • Petr Gregor

    (Charles University)

  • Riste Škrekovski

    (University of Ljubljana
    Faculty of Information Studies
    FAMNIT, University of Primorska)

  • Vida Vukašinović

    (Jožef Stefan Institute)

Abstract

In the 1-in port model, every vertex of a synchronous network can receive at most one message in each time unit. We consider simultaneous broadcasting of multiple messages from the same source or from distinct sources in such networks with an additional restriction that every received message can be sent out to neighbors only in the next time unit and never to already informed vertex. We use a general concept of level-disjoint partitions developed for this scenario. Here we introduce a subgraph extension technique for efficient spreading information within this concept. Surprisingly, this approach with so called biwheels leads to simultaneous broadcasting of optimal number of messages on a wide class of graphs in optimal time. In particular, we provide tight results for bipartite tori, meshes, hypercubes, Knödel graphs, circulant graphs. We also propose several open problems and conjectures.

Suggested Citation

  • Petr Gregor & Riste Škrekovski & Vida Vukašinović, 2018. "Broadcasting multiple messages in the 1-in port model in optimal time," Journal of Combinatorial Optimization, Springer, vol. 36(4), pages 1333-1355, November.
  • Handle: RePEc:spr:jcomop:v:36:y:2018:i:4:d:10.1007_s10878-018-0274-x
    DOI: 10.1007/s10878-018-0274-x
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    References listed on IDEAS

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    1. Gregor, Petr & Škrekovski, Riste & Vukašinović, Vida, 2015. "Rooted level-disjoint partitions of Cartesian products," Applied Mathematics and Computation, Elsevier, vol. 266(C), pages 244-258.
    2. Gregor, Petr & Škrekovski, Riste & Vukašinović, Vida, 2018. "Modelling simultaneous broadcasting by level-disjoint partitions," Applied Mathematics and Computation, Elsevier, vol. 325(C), pages 15-23.
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