Mobile ad hoc networks (MANET)
Mobile ad hoc networks (MANET)
Mobile ad hoc networks (MANET)
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
AODV: Maintenance of a route<br />
Destination Sequence Numbers prevent loops<br />
A sends to D, Link from C to D breaks<br />
RERR from C to A gets lost<br />
Later, C wants to send to D<br />
RREQ contains higher Destination Sequence Number<br />
A receives RREQ via C-E-A<br />
A sees higher Destination Sequence Number and does not sent RREP<br />
for D<br />
A B C D<br />
E<br />
<strong>Mobile</strong> <strong>ad</strong> <strong>hoc</strong> <strong>networks</strong> 43<br />
www.tm.uka.de<br />
Local Route Repair<br />
AODV: Optimizations<br />
In case of a link break, RERR is not sent to the source immediately<br />
Node detecting a link break searches a new route to the destination itself<br />
(RREQ)<br />
Can reduce network lo<strong>ad</strong> in the average<br />
Can le<strong>ad</strong> to worse (longer) routes, as only sections of the route are<br />
newly determined<br />
AODV is a „standard protocol“ (experimental) in the IETF<br />
(RFC 3561)<br />
<strong>Mobile</strong> <strong>ad</strong> <strong>hoc</strong> <strong>networks</strong> 44<br />
www.tm.uka.de
Change language