Appeal No. 96-3047
Application 08/053,191
such networks where different access points have
different network ID's, and in which the network ID is not
allowed to change during a session, the invention makes
roaming possible by programming mobile units so as to appear
to the network as "virtual routers" able to change access
points during a session. These virtual routers, unlike
conventional routers, connect one sublet to one other sublet,
the one sublet being connected to a mobile unit having a fixed
network ID and the other sublet, through fault-tolerant
routing, being connected to a selectable access point and
therefore having a variable network ID.
Representative claim 1 is reproduced as follows:
1. In a computer network running under a network
operating system, said network operating system providing
fault-tolerant internet routing of network communications
between nodes and requiring that a network ID of a node remain
constant for the duration of a session, said nodes including a
plurality of mobile computing devices and said network
including a wired network and a plurality of access points
providing wireless access of said mobile computing devices to
said wired network, at least some of said access points having
different network IDs, a method of providing a capability of
said mobile computing devices to roam during a session by
changing access points to said network, comprising the steps
of:
-3-
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