1. Maya Carroll 11/14/2013 COT 6930 - Florida Atlantic
UniversityMobile Ad Hoc Routing in Vehicular Networks1
2. Introduction Why do we need multi-hop routing in VANET?
Networking Challenges Why focus on certain types of routing?
Traditional types of MANET Routing Technical limitations for MANET
routing solutions in VANET scenarios Concept: Mobility-assisted
routing Adapting MANET for VANET Categories of Routing Protocols
for VANET MANET routing protocols adapted for VANET scenarios
ConclusionMobile Ad Hoc Routing in Vehicular Networks2 3. Multi-hop
wireless networking (Usually V2Vcommunication) Mesh Mobile Ad hoc
Intermittently connected Need to seamlessly use all technologies at
the same time Use MANET to fill gaps in infrastructured networks
(ex: In less dense urban areas)Mobile Ad Hoc Routing in Vehicular
Networks3 4. Mesh:Mobile ad hoc:Intermittently Connected:
Single-hop Infrastructured wireless network Ex: (RSU) Lamppost to
lamppost Multi-hop Use in scenarios where nodes are too far from
base stations Connect with other MUs EX: queue of cars in line at a
lamp post No path towards a base station exists Provide a sort of
full coverage through packet forwarding via other MUs until message
reaches base station Ex: Cars in a rural areaMobile Ad Hoc Routing
in Vehicular Networks4 5. Application layer User needs to be able
to select the networking technology given the state of the current
networks conditions and users cost + energy preferences for their
devices Transport layer Transportation method of packets depends on
the networks mode. Ex: Single-hop mode, multi-hop mode,
intermittent connectivity Routing layer Use different routing
schemes for different modes of operation Need new MANET approaches
to deal with intermittent connectivity Link layer Must be able to
switch between technologies on the fly Must be able to use multiple
technologies at the same timeMobile Ad Hoc Routing in Vehicular
Networks5 6. This presentation focuses on multi-hop and
intermittent routing issues Popular research topics because
traditional routing has already been solved Challenge is how to
adapt MANET protocols for VANET environmentsMobile Ad Hoc Routing
in Vehicular Networks6 7. Proactive Protocols1. Table-driven Update
table info with a periodReactive Protocols2. Only initiates route
discovery when neededHybrid Protocols3. 4.Both proactive and
reactive in natureGeographic ProtocolsMobile Ad Hoc Routing in
Vehicular Networks7 8. Not effective in VANET scenarios that
involve multi-hop or intermittent connectivityScalability Full
connectivity Mobility prediction Anticipation of path breakages
Extensive use of flooding Nonlocal operation Exploitation of
existing knowledge * Neither proactive or reactive routing will
work Mobile Ad Hoc Routing in Vehicular Networks8 9. 1. 2.
3.Source-routing based protocols Geographic-routing-based protocols
Trajectory-Based ProtocolsMobile Ad Hoc Routing in Vehicular
Networks9 10. (GSR) Geographic Source Routing (SAR) Spatial Aware
Routing A-STAR (CAR) Connectivity-Aware Routing Greedy Perimeter
Coordinate Routing VADD (TBF) Trajectory Based Forwarding (GeOpps)
Opportunistic Geographical RoutingMobile Ad Hoc Routing in
Vehicular Networks10 11. Mobile Ad Hoc Routing in Vehicular
Networks11
