Ecole d'ingénieur et centre de recherche en Sciences du numérique

Delay analysis of epidemic schemes in sparse and dense heterogeneous contact networks

Sermpezis, Pavlos; Spyropoulos, Thrasyvoulos

IEEE Transactions on Mobile Computing, Vol. 16, N°9, September 1st, 2017

Epidemic algorithms have found their way into many areas of computer science, such as databases and distributed systems, and recently for communication in Opportunistic or Delay Tolerant Networks (DTNs). To ensure analytical tractability, existing analyses of epidemic spreading predominantly consider homogeneous contact rates between nodes. However, this assumption is generally not true in real scenarios. In this paper we consider classes of contact/mobility models with heterogeneous contact rates. Through an asymptotic analysis we prove that a first-order, mean value approximation for the basic epidemic spreading step becomes exact in the limiting case (large network size). We further derive simple closed form approximations, based on higher order statistics of the mobility heterogeneity, for the case of finite-size networks. To demonstrate the utility of our results, we use them to predict the delay of epidemicbased routing schemes and analyze scenarios with node selfishness. We validate the analytic results through extensive simulations on synthetic scenarios, as well as on real traces to demonstrate that our expressions can be useful also in scenarios with significantly more complex structure. We believe these results are an important step forward towards analyzing the effects of heterogeneity (of mobility and/or other characteristics) on the performance of epidemic-based algorithms.

Document Doi Bibtex

Titre:Delay analysis of epidemic schemes in sparse and dense heterogeneous contact networks
Mots Clés:epidemic algorithms, heterogeneous mobility, opportunistic networks, performance analysis
Type:Journal
Langue:English
Ville:
Date:
Département:Systèmes de Communication
Eurecom ref:5088
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Bibtex: @article{EURECOM+5088, doi = {http://dx.doi.org/10.1109/TMC.2016.2634017}, year = {2017}, month = {09}, title = {{D}elay analysis of epidemic schemes in sparse and dense heterogeneous contact networks}, author = {{S}ermpezis, {P}avlos and {S}pyropoulos, {T}hrasyvoulos}, journal = {{IEEE} {T}ransactions on {M}obile {C}omputing, {V}ol. 16, {N}°9, {S}eptember 1st, 2017}, url = {http://www.eurecom.fr/publication/5088} }
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