Main Ideas


Geographical source routing (GSR)

Determines the destination location by RLS (reactive location service)

Greedy perimeter geographic routing (GPCR)

The packet is greedily forwarded to the junction node (coordinator)

Improved greedy traffic-aware routing (GyTAR)

Selects junctions based on vehicles traffic density and distance to the destination

Connectivity-aware routing (CAR)

1) Greedy forwarding between anchor points along the selected path

2)The packet is forwarded to a node closer to an anchor point


OPERA: Opportunistic Packet Relaying in disconnected vehicular ad hoc networks

1) Vehicles moving in the same direction are grouped into clusters

2) Opportunistic technique is used to select a better available path

Topology-assist geo-opportunistic routing

Uses two-hop beacons for the selection of a forwarding node


1) Uses packet priorities to maximize delivery

2) Includes three stages: neighbor discovery, data transfer, and storage management



A data forwarder selection decision is shifted from the sender to receiver

Geographical opportunistic routing (GeOpps)

A data forwarder is selected based on the trajectory information of individual vehicles

Trajectory-based data forwarding (TBD)

Is based on vehicle trajectory information and traffic statistics

Two-level trajectory-based routing (TTBR)

1) The communication area is divided into cells of a grid

2) A grid based location system is applied where some peer servers are distributed