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| Authored by: Ian Al on Thursday, March 21 2013 @ 03:02 AM EDT |
It is one of those method patents with an on-a-mobile-phone system claim.
I thought I knew something about Code Division Multiple Access, but I was
confusing it with Carrier Sense Multiple Access.
From memory (having just copied it from Wikipedia) 'CDMA employs spread-spectrum
technology and a special coding scheme (where each transmitter is assigned a
code) to allow multiple users to be multiplexed over the same physical
channel.'.
The patent may not be CDMA since the term is used for several US mobile phone
systems based on CDMA.
It raises the question of whether it is an invention at all. The math function
method appears to be a way of sharing a code convention to allow multiple access
via wireless broadcast signals. The code convention has to be observed by both
the transmitter and receiver. In essence, it is just using math to generate a
number. The patent monopolises numbers generated by the math function when used
for setting up sessions on the multiple access broadband wireless communication
system.
As long as both transmitter and receiver use the same math function, it will
still work. Why is this math function a novel and useful invention when a vast
selection of alternative math functions will work equally well? It is not a
technical requirement of the protocol to use this particular math function.
It is only useful for systems designed to use that math function. The only value
of the patent is to provide an entry fee for access to this particular 'brand'
of mobile phone system. It is more a proprietary code than an invention.
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Regards
Ian Al
Software Patents: It's the disclosed functions in the patent, stupid![ Reply to This | Parent | # ]
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- Agreed. - Authored by: albert on Friday, March 22 2013 @ 02:39 PM EDT
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