Modeling broadcasting using omnidirectional and directional antenna in delay tolerant networks as an epidemic dynamics

Fernando Peruani, Abyayananda Maiti, Sanjib Sadhu, Hugues Chaté, Romit Roy Choudhury, Niloy Ganguly

Research output: Contribution to journalArticlepeer-review


We study broadcasting of information in a system of moving agents equipped with omnidirectional as well as directional antenna. The agent communication protocol is inspired by the classical SIRS epidemics dynamics. We assume that the antennas of all agents have a fixed transmitting power, while signal reception only occurs when the receivers sense signals with power exceeding a certain threshold. Thus, information exchange is a local phenomenon which depends on the relative distance and antenna orientation between the transmitting and the receiving agent. We derive an expression for the mean broadcasting time and study the information dissemination robustness of the system using elements of classical epidemiology and physics. In particular, we show that the mean broadcasting time depends upon ψ which quantifies the area the radiation pattern of the antenna sweeps as it moves. We report three important observations (a) directional antennas perform better than omnidirectional antennas, (b) directional antennas whose beam-width is narrower perform even better, and (c) the performance enhances a lot if directional antennas rotate. These behaviors can be understood in the light of the reported analytical findings.

Original languageEnglish (US)
Article number5452946
Pages (from-to)524-531
Number of pages8
JournalIEEE Journal on Selected Areas in Communications
Issue number4
StatePublished - May 2010
Externally publishedYes


  • Broadcasting in networks
  • Delay tolerant networks
  • Directional antenna
  • Epidemic dynamics
  • Mean field equation
  • SIRS model

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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