HLA-based Adaptive Distributed Simulation of Wireless Mobile Systems

  • Authors:
  • Luciano Bononi;Gabriele D'Angelo;Lorenzo Donatiello

  • Affiliations:
  • Dipartimento di Scienze dell'Informazione, Università degli Studi di Bologna, Via Mura Anteo Zamboni 7, 40126, Bologna, Italy;Dipartimento di Scienze dell'Informazione, Università degli Studi di Bologna, Via Mura Anteo Zamboni 7, 40126, Bologna, Italy;Dipartimento di Scienze dell'Informazione, Università degli Studi di Bologna, Via Mura Anteo Zamboni 7, 40126, Bologna, Italy

  • Venue:
  • Proceedings of the seventeenth workshop on Parallel and distributed simulation
  • Year:
  • 2003

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Abstract

Wireless networks' models differ from wired ones atleast in the innovative dynamic effects of host-mobilityand open-broadcast nature of the wireless medium.Topology changes due to simulated hosts' mobility mapon causality effects in the "areas of influence" of eachmobile device. The analysis of wireless networks ofinterest today may include a potentially high number ofsimulated hosts, resulting in performance and scalabilityproblems for discrete-event sequential simulation toolsand methods, on a single physical execution unit (PEU).In a distributed simulation, the main bottleneck becomesthe communication and synchronization required tomaintain the causality constrains between distributedmodel components. In this work we propose a HLAbased,dynamic mechanism for the runtime managementand allocation of model entities in a distributedsimulation of wireless networks models, over a cluster ofPEUs. By adopting a runtime evaluation of causalbindings between model entities we map the causal effectsof virtual topology changes to dynamic migration of datastructures. Preliminary results demonstrate that theprototype heuristics lead to a reduction in the percentageof external communication between the PEUs, limitedoverheads and performance enhancements for a worstcasescenario.