Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Topology dissemination based on reverse-path forwarding
open-in-new
<p>Topology broadcast based on reverse-path forwarding (TBRPF) is a <a href="/facts/Link-state_routing_protocol/kFHQ5FkA">link-state routing protocol</a> for <a href="/facts/Wireless_mesh_network/mGvuc3tM">wireless mesh networks</a>. </p><p>The obvious design for a wireless link-state protocol (such as the <a href="/facts/Optimized_link-state_routing_protocol/G5M3pvQK">optimized link-state routing protocol</a>) transmits large amounts of routing data, and this limits the utility of a link-state protocol when the network is made of moving nodes. The number and size of the routing transmissions make the network unusable for any but the smallest networks. </p><p>The conventional solution is to use a <a href="/facts/Distance-vector_routing_protocol/x7caJ1QI">distance-vector routing protocol</a> such as <a href="/facts/AODV/DlMz6E7b">AODV</a>, which usually transmits no data about routing. However, distance-vector routing requires more time to establish a connection, and the routes are less optimized than a link-state router. </p><p>TBRPF transmits only the <i>differences</i> between the previous network state and the current network state. Therefore, routing messages are smaller, and can therefore be sent more frequently. This means that nodes' routing tables are more up-to-date. </p><p>TBRPF is controlled under a <a href="/facts/United_States_patent_law/uxtfSzha">US patent</a> filed in December 2000 and assigned to <a href="/facts/SRI_International/flSHunVK">SRI International</a> (Patent ID 6845091, issued January 18, 2005). </p>