An apparatus and method is provided for facilitating the seamless handoff
of IP connections between access routers in an IP network. The mobile IP
network includes two or more access routers each serving a different
geographic service area. When a mobile terminal moves from the first
service area to the second service area, the mobile terminal transmits to
the second access router the IP address of the previous access router.
The second access router uses this information to learn capabilities of
the first access router (e.g., bandwidths supported, security schemes,
and the like) for use in future handoff decisions, and exchanges
capability information with the first access router. The assumption is
made based on the exchanged information that the access routers are
geographically proximate. When another mobile terminal transitions from
one service area to another, the system selects an optimal target access
router based on the previously learned information, including the
inferred geographic proximity between access routers.