Beyond centrality - Classifying topological significance using backup efficiency and alternative paths

Yuval Shavitt*, Yaron Singer

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In networks characterized by broad degree distribution, such as the Internet AS graph, node significance is often associated with its degree or with centrality metrics which relate to its reachability and shortest paths passing through it. Such measures do not consider availability of efficient backup of the node and thus often fail to capture its contribution to the functionality and resilience of the network operation. In this paper we suggest the Quality of Backup (QoB) and Alternative Path Centrality (APC) measures as complementary methods which enable analysis of node significance in a manner which considers backup. We examine the theoretical significance of these measures and use them to classify nodes in the Internet AS graph while applying the BGP valleyfree routing restrictions. We show that both node degree and node centrality are not necessarily evidence of its significance. In particular, some medium degree nodes with medium centrality measure prove to be crucial for efficient routing in the Internet AS graph.

Original languageEnglish
Title of host publicationNETWORKING 2007 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet - 6th International IFIP-TC6 Networking Conference, Proceedings
EditorsIan F. Akyildiz, Raghupathy Sivakumar, Eylem Ekici, Jaudelice Cavalcante de Oliveira, Janise McNair
PublisherSpringer Verlag
Pages774-785
Number of pages12
ISBN (Print)9783540726050
DOIs
StatePublished - 2007
Event6th International IFIP-TC6 Networking Conference - NETWORKING 2007 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet - Atlanta, GA, United States
Duration: 14 May 200718 May 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4479 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference6th International IFIP-TC6 Networking Conference - NETWORKING 2007 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet
Country/TerritoryUnited States
CityAtlanta, GA
Period14/05/0718/05/07

Keywords

  • Internet AS graph
  • Internet topology
  • Network analysis

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