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U.S. Firms Take on Australia's CSIRO Over Patents
dingram17 writes "ABC News is reporting that six U.S. computer companies (Apple, Dell, Hewlett Packard, Intel, Microsoft and Netgear) are taking legal action to try to break a U.S. patent that the CSIRO holds on wireless networking.
The CSIRO has patents on OFDM technology, as used in 802.11a and 802.11g. It has been alleged that the CSIRO demands $4 per chipset for the use of this technology. It appears that the patent in question is U.S. Patent 5,487,069 'Wireless LAN.' From a quick look, this appears to be a wide ranging patent."
Commonwealth Scientific and Industrial Research Organisation.
Kind-of a catch-all government sponsored department for scientific research.
See http://www.csiro.au/
CSIRO is an applied science research organisation where part of the money is provided by the Australian government, and part of the money is provided by business.
There is a strong focus on making practical discoveries for use in industry.
I think that there should be a blanket patent exemption for pure research, though I'm not quite sure how one should define the exemption.
Any sufficiently advanced technology is indistinguishable from a rigged demo
--Andy Finkel (J. Klass?)
A government entity should never be allowed to patent its own tech, that tech was paid for by the people and should be available freely to all in every scenario I can possibly think of.
Profits from CSIRO patents are reinvested into research. This in turn lowers the required government funding thus saving Aussie taxpayers quite a bit of money.
By the way, the CSIRO is highly respected by a lot of Australians.
Shitdrummer
It's true that the US patent system has major problems. It is not true that the US patent system is biased in favor of patent challengers. It is profoundly biased in favor of patent holders. So "this sort of crap", um, was... from patent challengers. Do you even understand what's going on?
As to patent systems: given the problems with the Australian patent system, you know the old saying about people living in glass houses...
This Patent is not broad as in "vague and meaningless" - rather, it contains many specific claims, and thus only affects certain technologies.
....
The "Background of the Invention" section is written in plain English instead of Patentese, and includes the following:
(If it sounds dated, well, the application was filed on the 23rd of November, 1993)
"Accordingly, the need arises for a LAN to which such portable devices can be connected by means of a wireless or radio link.
Such wireless LANs are known, however, hitherto they have been substantially restricted to low data transmission rates. In order to achieve widespread commercial acceptability, it is necessary to have a relatively high transmission rate and therefore transmit on a relatively high frequency, of the order of 1 GHz or higher. As will be explained hereafter, radio transmission at such high frequencies encounters a collection of unique problems.
One wireless LAN which is commercially available is that sold by Motorola under the trade name ALTAIR. This system operates at approximately 18 GHz, however, the maximum data transmission rate is limited to approximately 3-6 Mbit/s. A useful review of this system and the problems of wireless reception at these frequencies and in "office" environments is contained in "Radio Propagation and Anti-multipath Techniques in the WIN Environment", James E. Mitzlaff IEEE Network Magazine November 1991 pp. 21-26.
This engineering designer concludes that the inadequate performance, and the large size, expense and power consumption of the hardware needed to adaptively equalize even a 10 Mbit/s data signal are such that the problems of multipath propagation cannot thereby be overcome in Wireless In-Building Network (WIN) systems. Similarly, spread spectrum techniques which might also be used to combat multipath problems consume too much bandwidth (300 MHz for 10 Mbits/s) to be effective. A data rate of 100 Mbit/s utilizing this technology would therefore consume 3 GHz of bandwidth.
Instead, the solution adopted by Motorola and Mitzlaff is a directional antenna system with 6 beams for each antenna resulting in 36 possible transmission paths to be periodically checked by the system processor in order to locate the "best quality" path and "switch" the antennae accordingly. This procedure adds substantial bulk and cost to the system. This procedure is essentially the conversion of a multipath transmission problem into a single path transmission environment by the use of directional antennae.
OBJECTS AND SUMMARY OF THE INVENTION
The object of the present invention is to provide a wireless LAN in a confined multipath transmission environment having a high bit rate even through the reciprocal of the data or information bit rate (the data "period") is short relative to the time delay differences between significant transmission paths.
Preferably, transmission is enhanced by the use of one or more of the following techniques, namely interactive channel sounding, forward error correction with redundancy sufficient for non-interactive correction, modulation with redundancy sufficient for interactive error correction by re-transmission of at least selected data, and the choice of allocation of data between sub-channels.
The radio transmission is also preferably divided into small packets of data each of which is transmitted over a time period in which the transmission characteristics over the predetermined range are relatively constant.
The encoding of the data is preferably carried out on an ensemble of carriers each costituting a sub-channel and having a different frequency with the modulation of each individual carrier preferably being multi-level modulation of carrier amplitude and/or phase (mQAM).
The Australian Bureau of Statistics begs to differ on the supposed "rapidly rising crime rate".