Geocast

Geocast refers to the delivery of information to a subset of destinations in a wireless peer-to-peer network identified by their geographical locations.

It is used by some mobile ad hoc network routing protocols, but not applicable to Internet routing.

A geographic router (Geo Router) calculates its service area (geographic area it serves) as the union of the geographic areas covered by the networks attached to it.

This service area is approximated by a single closed polygon.

Geo Routers exchange service area polygons to build routing tables.