1.2 Communication standards Based on the technology of WAVE and dSRC a vehicle node can communicate with other vehicle nodes in the communication range which compose the communication links and the foundation of multi-hops routing in VANETS pplication Commercial or traffic announce, P2P communication, collision warning, other communication Routing Unicast, broadcast, geocast routing Link WAVE DSRC Physical Hardware equipment
1.2 Communication Standards ◼ Based on the technology of WAVE and DSRC, a vehicle node can communicate with other vehicle nodes in the communication range, which compose the communication links and the foundation of multi-hops routing in VANETs Application Commercial or traffic announce, P2P communication, collision warning, other communication Routing Unicast, broadcast, geocast routing Link WAVE, DSRC Physical Hardware equipment
1.3 Vehicular scenario Highway scenario 口2
1.3 Vehicular Scenario ◼ Highway scenario
1.3 Vehicular scenario City scenario 写只写百 dIS
1.3 Vehicular Scenario ◼ City scenario
1. 4 Routing Types Unicast Route a packet from a source vehicle to a destination vehicle a Broadcast Route a packet from a source vehicle to all the vehicles in the network Geocast Routing packets from a source to vehicles in a specific area
1.4 Routing Types ◼ Unicast ◼ Route a packet from a source vehicle to a destination vehicle ◼ Broadcast ◼ Route a packet from a source vehicle to all the vehicles in the network ◼ Geocast ◼ Routing packets from a source to vehicles in a specific area
1.5 Characteristics Specific mobility model Frequently changing topology No limitation in computing and energy Uneven distribution of vehicles Divided topology Geographical requirement
1.5 Characteristics ◼ Specific mobility model ◼ Frequently changing topology ◼ No limitation in computing and energy ◼ Uneven distribution of vehicles ◼ Divided topology ◼ Geographical requirement