Appeal No. 2000-0272
Application No. 08/922,715
have been obvious to one of ordinary skill in the art at the time
of the invention to have utilized a timer (re-registration
interval) to control the sending of a re-registration signal in
the admitted system.”
Although it is known in the acknowledged prior art for a
subscriber unit to register with a system by transmitting
“registration information back to the base station receivers”
(specification, page 1), it is not known in the acknowledged
prior art to transmit such registration information in response
to expiration of a re-registration time interval or any other
time interval. Balachandran discloses a timer and a time
interval, but it is used to facilitate handoff of a remote unit
from one channel to another channel (Figures 7 and 8; column 16,
lines 15 through 28 and column 18, lines 20 through 26). As
explained by Balachandran (column 18, lines 40 through 45),
“using a T__HANDOFF1 timer allows a remote unit in accordance
with the present invention to ensure that scanning occurs with
sufficient frequency to ensure that the remote unit chooses the
best channel available, yet not so frequently as to disrupt the
communications capacity.”
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Last modified: November 3, 2007