Appeal No. 2002-1498
Application No. 09/042,202
with this approach is alleged to be in the paradox arising from
the need for transaction credits to be available in order to
perform this credit initialization but the credit initialization
cannot take place until credits are available. The solution of
the prior art was to use a “power on mode” which allowed all
transactions to be sent without using credits but this is alleged
to require extra logic and certain minimum queue sizing so that
the user needed to have extensive knowledge of the system.
The instant invention is said to overcome these
disadvantages by employing the ordinary flow transfer processes
of the system. That is, if the sender has credits, then it may
send transactions to the destination node. If the destination
node has debits, then it releases them back to the sender node.
During initialization, the credit register is loaded with a zero
so that the sender node begins operation with no credits and no
transactions can be sent. The debit register is not loaded with
a zero but, rather, with the maximum credits representing the
size of its queue. Accordingly, the destination register begins
operations with the debit register full and, through normal
operations, releases the credits back to the sender node. Then
the sender node will have credits and can send transactions and
the destination node will have an empty debit register. This is
-3–
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