Appeal 2007-1784
Application 09/777,609
STATEMENT OF THE CASE
Appellants have invented a fault tolerant method/platform that
operates a process in an active state, operates a process in a standby state,
and has switchover capabilities for promoting the process in the standby
state to the active state. The method and platform replicates network
connection status data of a network connection hosted by the active process
from the active process to the standby process (Figures 1 and 3;
Specification 2).
Claim 1 is representative of the claims on appeal, and it reads as
follows:
1. A method for hosting network connections in a fault tolerant
platform having a process in an active state, a process in a standby state and
switchover capabilities for promoting a process in the standby state to an
active state, the method including:
replicating network connection status data of a network connection
hosted by the active process from the active process to the standby process;
maintaining for the standby process a corresponding standby network
connection updated with said replicated data; and
during promotion of the standby process to an active state,
deactivating the network connection hosted by the active process without
closing the connection on the network, transferring a network address of the
active process to the standby process and activating the corresponding
standby connection with that network address thereby hosting the connection
on the promoted standby process, whereby the promoted standby process
does not need to reopen the connection on the network.
The prior art relied upon by the Examiner in rejecting the claims on
appeal is:
Baskey US 6,148,410 Nov. 14, 2000
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