Discussion about Q patents recently upheld in Europe from RB Club:
By: sfx2000
Reply To: 2604 by blgg Sunday, 12 Nov 2000 at 10:30 AM EST
Post # of 2633
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Dig through the European Patent office, and look at the abstracts....
EP705512 - Method and Apparatus for Determining the Data Rate of a Received Signal
This is for both the base station and the mobile. Furthermore, it is applicable not only to 2G CDMA, but also to 2G TDMA and GSM. In 3G, many voice and data codec will be used, and IDCC will have to license. Remember in the context of digital communications, voice is data... and data has many different modes as does voice.
"A system for determining the rate at which data has been encoded in the receiver of a variable-rate communications system. The data is received in frames having a fixed number of symbols. Multiple copies of symbols fill the frame when data is encoded at less than the full rate. At an encoding rate of one fourth the full rate, for example, each symbol in the frame is repeated four times. The incoming symbols are provided to multiple paths for decoding. Each path decodes the symbols at one of the possible rates. Error metrics, which describe the quality of the decoded symbols, are extracted and provided to a processor. The error metrics may include Cyclic Redundancy Check (CRC) results, Yamamoto Quality Metrics, and Symbol Error Rates. The processor analyzes the error metrics and determines the most probable rate at which the incoming symbols were encoded."
l2.espacenet.com
EP521859 - Direct Digital Synthesizer Driven Phase Lock Loop Frequency Synthesizer with Hard Limiter
This is significant in that not only does it simplify design, but it makes multi-mode multi-frequency handsets easier to design and build. This is very much a terminal application, and it is significant.
"A frequency synthesizer (100, 200) using a direct digital synthesizer (DDS) (102, 216) whose output signal is filtered by a bandpass filter (110, 218) and may be amplitude limited by a limiter (111, 219) to reduce spurious noise. In one embodiment, the DDS (102) is coupled to a phase lock loop (114) which receives the DDS generated reference signal and a divide-by-N signal for generating an output frequency determined by the divide-by-N signal. In a second embodiment, the DDS (216) is incorporated within the feedback path of a phase lock loop (202) having an output frequency determined by an input reference frequency and the DDS step size controlled by a frequency control signal. Optional dividers (112, 214, 219) may be provided in either embodiment in the feedback path to further affect the synthesizer (100, 200) output frequency."
l2.espacenet.com
EP666007 - Mobile Communications Device Registration Method.
Both the base station and the mobile have to use this patent. In 3G, this is very significant in that how and where the mobile registers determines what mode the base station will use to page the mobile and what technology it will use to establish a traffic channel, based on probability of where the mobile is, and where it is going. Please keep in mind that 3G systems will overlay, not replace, existing 1G/2G systems.
"A distance based method for mobile station registration in a cellular communication system. The mobile station registers whenever it moves into a new cell that is greater than some predefined distance from the previous cell where it registered. Cell base stations transmit corresponding base station location information and a distance value. The mobile station receives the base station location information and computes the distance from a cell in which the mobile station last registered to the current cell in which the mobile station is present. When the computed distance is greater than the distance value associated with the registration cell the mobile station registers. Pages for the mobile station are transmitted within a group of cells within a distance of the registration cell corresponding to the registration cell transmitted distance value."
l2.espacenet.com
Looks like NOK's IDCC didn't bear that much fruit, NOK will still have to license.
sfx |
