Appeal No. 2002-1043
Application 08/784,860
station then may use a test pattern in a polling process such
that the upgraded RF terminals can determine the feasibility of
using the higher data rate. The RF terminals of fixed data rate
will respond as usual. See column 3, lines 1 through 14 of
Mahany.
Figures 7a and 7b illustrate an implementation of the
embodiment of Figure 6 where the receiver of each mobile unit may
transmit at a standard rate or at a higher rate for increase
system throughput. See column 3, lines 60 through 67 of Mahany.
The exemplary operation of the system according to Figures 6, 7a
and 7b are detailed in columns 9 and 10 of Mahany. Mahany
teaches that receiver 82a would not need to be switchable but
could be fixed to receive a standard data rate, e.g. 4800 baud.
We note that receiver 82a is in the mobile terminal unit 80 shown
in Figure 6. See column 9, lines 65 through 67. Mahany further
teaches that mobile unit 80 would receive a poll during time
interval 131 and be ready to transmit messages at a higher rate
e.g. 9600 baud. See column 10, lines 1 through 3. Thus, we find
that Mahany does not teach a mobile unit which is able to receive
at a higher rate. We find that Mahany teaches that mobile unit
80 is able to transmit at two different data rates and only
receive at one data rate. Thus, the Mahany control message is to
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