System and method for providing soft handoff of a cellular mobile-to-mobile call
CA 2118438 C · Owner: Spanke, Ronald Anthony · Inventors: Hemmady, Jayant Gurudatta; Spanke, Ronald Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Soft handoff is provided in a mobile-to-mobile call in a cellular communication system, wherein a first mobile is moving from a first cell to a second, cell, and the second mobile is in a third cell. The first mobile requests a handoff, from the first cell to the second cell. In response information regarding the , call, handoff is sent to the second and third cells. During handoff the first and , second, cells receive radio transmission from the first mobile and they both , translate the, transmissions into electronic data packetize the data, and send the , packetized data to the third cell. The third cell sends packetized data from the second mobile to both, the first and second cells. …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 19, 1994 and granted April 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.