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The Story Behind Australia's CSIRO Wi-Fi Claims
An anonymous reader writes "U.S. consumers will be making a multimillion dollar donation to an Australian government agency in the near future, whether they like it or not. After the resolution of a recent lawsuit, practically every wireless-enabled device sold in the U.S. will now involve a payment to an Australian research organization called the Commonwealth Scientific and Industrial Research Organization, or CSIRO, which hired U.S. patent lawyers who told a very lucrative tale in an East Texas courtroom, that they had '[invented] the concept of wireless LAN ... [and] when the IEEE adopted the 802.11a standard in 1999 — and the more widely-used 802.11g standard years later — the group was choosing CSIRO technology. Now CSIRO had come to court to get the payments it deserved.'"
Before posting a link to this article, perhaps you should have read it. Ars is usually pretty good, but the fact that they allowed this incredibly biased piece of crap be published in their site makes me ashamed to go there.
There have been many good articles posted about the CSIRO's fight to get a reasonable royalty out of all these companies that agreed to pay one right at the beginning of the process. This is not one of them.
Nice summary there, painting the CSIRO as some kind of patent troll. They never claimed that they had "[invented] the concept of wireless LAN", they claimed that they had developed some very clever algorithms dealing with rejecting interference and the like. This is the work of a serious research organization, and without it wireless networks would be a lot less useful.
Go flame on an actual patent troll, or do your basic research yourself.
Is 1563649 a prime number?
Ignoring the validity of the patent, IEEE was aware that it might be needed. http://standards.ieee.org/about/sasb/patcom/loa-802_11a-csiro-04Dec1998.pdf
They DIDN'T. There's documentation to prove IEEE knew of the CISRO patent. IIRC, they first requested free usage, and when CISRO refused, they request FRAND licensing, and when they agreed, went forward with the standard.
Yes it would have, but the IEEE found the technology they developed as compelling enough to tie themselves to required licensing on that patent. Maybe 802.11g would have been slower, less resilient to interference, etc. Whatever the case, they did use this tech, and need to license it.
Either an idea is obvious, or it isn't, it doesn't change in hindsight vs foresight. If someone spends a mil to develop something after someone else developed and patented it, too bad, that doesn't make it obvious. Besides, it would be far, far too easy to defraud the legitimate inventor, just claiming so-and-so hasn't seen the patent, but came up with the same thing.
Right now, the burden of proof for overturning a patent is too high, but throwing more rules and schemes and exceptions won't solve the problem, it'll make it worse... and even bigger mess you need more lawyers and money to avoid getting screwed-over by.
Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
I only briefly looked at the patent, and it looks like it's simply the application of OFDM to wireless communication between computers. OFDM, for those who aren't very familiar, is a way to deal with linear time invariant systems that can corrupt the data. For example, you can consider the signal going from one antenna to the other as going through such a system. Since these types of systems will only modify the amplitude and phase of each frequency band separately, instead of mixing them together as would be the case in the time domain, you encode the information you want to send as specific frequencies. For example, if you send out a wireless signal and it echoes all over the place, the time domain signal gets all mixed up and "slushy". However, if you perform a Fourier transform on the input signal and the output signal, you'll notice that the echoing only caused frequency bands to individually get attenuated/magnified and/or shifted in phase, but none of the frequency bands has mixed together. OFDM exploits this property to provide for robust communication (well, it's a bit more complicated than that, but that's the general gist of it). However, it sounds like this patent is simply saying "hey, OFDM is good for wireless communication", which feels kind of obvious to me considering the point of OFDM.