A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Mobile Ad-hoc Networks Working Group of the IETF.
Title : Optimized Link State Routing Protocol
Author(s) : T. Clausen, P. Jacquet
Filename : draft-ietf-manet-olsr-09.txt
Pages : 72
Date : 2003-4-15
This document describes the Optimized Link State Routing (OLSR)
protocol for mobile ad hoc networks. The protocol is an optimization
of the classical link state algorithm tailored to the requirements of
a mobile wireless LAN. The key concept used in the protocol is that
of multipoint relays (MPRs) [1], [2]. MPRs are selected nodes which
forward broadcast messages during the flooding process. This
technique substantially reduces the message overhead as compared to a
classical flooding mechanism, where every node retransmits each
message when it receives the first copy of the message. In OLSR,
link state information is generated only by nodes elected as MPRs.
Thus, a second optimization is achieved by minimizing the number of
control messages flooded in the network. As a third optimization, an
MPR node may chose to report only links between itself and its MPR
selectors. Hence, as contrary to the classic link state algorithm,
partial link state information is distributed in the network. This
information is then used by for route calculation. OLSR provides
optimal routes (in terms of number of hops). The protocol is
particularly suitable for large and dense networks as the technique
of MPRs works well in this context.
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