Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. EPFL thesis
  4. Modeling and predicting mobility in wireless ad hoc networks
 
doctoral thesis

Modeling and predicting mobility in wireless ad hoc networks

Härri, Jérôme  
2007

Wireless Ad Hoc Networks are a particular paradigm where wireless devices communicate in a decentralized fashion, without any centralized infrastructure or decision. In order to avoid a situation where nodes chaotically try to communicate, distributed and localized structures (graphs, trees, etc.) need to be built. Mobility brings challenging issues to the maintenance and to the optimality of such structures. In conventional approaches, structures are adapted to the current topology by each node periodically sending beacon messages, which is a significant waste of network resources. If each node can obtain some a priori knowledge of future topology configurations, it could decide to send maintenance messages only when a change in the topology effectively requires updating the structure. In this Doctoral Thesis, we investigate this approach and define the Kinetic Graphs, a novel paradigm regrouping mobility predictions for a kinetic mobility management, and localized and distributed graph protocols to insure a high scalability. The Kinetic Graph framework is able to naturally capture the dynamics of mobile structures, and is composed of four steps: (i) a representation of the trajectories, (ii) a common message format for the posting of those trajectories, (iii) a time varying weight for building the kinetic structures, (iv) an aperiodic neighborhood maintenance. By following this framework, we show that any structure-based ad-hoc protocol may benefit from the kinetic approach. A significant challenge of Kinetic Graphs comes from prediction errors. In order to analyze them, we illustrate the relationship between the prediction model and the mobility model. We decompose the prediction errors into three metrics: the adequacy between the prediction and the mobility models, the predicability of the mobility model, and the mobility model's realism. Following the framework, we define a kinetic model for the modeling of the trajectories and then analyze the extents of the effects of each error metric and develop solutions in order to reduce them. We finally adapt the Multipoint Relaying (MPR) protocol, used by the Optimized Link State Routing protocol (OLSR), and show the significant improvements that may be obtained by using the Kinetic Graph Framework, even on the very challenging vehicular networks.

  • Files
  • Details
  • Metrics
Type
doctoral thesis
DOI
10.5075/epfl-thesis-3836
Author(s)
Härri, Jérôme  
Advisors
Bonnet, Christian
Jury

Hannes Hartenstein, Jean-Yves Le Boudec, Mario Gerla

Date Issued

2007

Publisher

EPFL

Publisher place

Lausanne

Public defense year

2007-06-22

Thesis number

3836

Total of pages

236

Subjects

Kinetic graphs

•

mobility management

•

mobility modeling

•

mobility predictions

•

multipoint relays (MPR)

•

optimized link state routing (OLSR)

•

broadcasting

•

routing

•

wireless ad hoc networks

•

vehicular networks

•

Graphe Cinétique

•

gestion de mobilité

•

modélisation de mobilité

•

prédiction de mobilité

•

relais multipoint (MPR)

•

OLSR

•

diffusion

•

routage

•

réseaux ad-hoc sans fil

•

réseaux véhiculaires

Faculty
IC  
Section
IC-SSC  
School
EURECOM  
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/6525
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés