Proximal Labeling for Oblivious Routing in Wireless Ad Hoc Networks

  • Authors:
  • Edgar Chávez;Maia Fraser;Héctor Tejeda

  • Affiliations:
  • Universidad Michoacana, and CICESE,;Instituto Politécnico Nacional,;Universidad Michoacana,

  • Venue:
  • ADHOC-NOW '09 Proceedings of the 8th International Conference on Ad-Hoc, Mobile and Wireless Networks
  • Year:
  • 2009

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Abstract

For an adhoc network with n nodes, we propose a proactive routing protocol without routing tables which uses O (logn ) bits per node for the location service tables. The algorithm is based on 1-dimensional virtual coordinates, which we call labels. The decision of where to forward a packet is oblivious and purely local, depending only on the labels of the immediate neighbours and the label of the destination: the packet is forwarded to the neighbour whose label is closest to that of the destination. The algorithm is based on mapping the network to an ordered list where each node has one or more integer labels. This labeling can be produced by any arbitrary traversal of the network visiting all the nodes, in particular by a depth-first search of a flood tree which gives a 2n length traversal. We show experimentally that, in terms of hop number, our routing algorithm is far superior to geographic protocols in randomly generated networks and for sparse networks produces routes of length very close to those of the shortest path.