Method of accessing a packet in a cellular digital radio system
CA 2189693 C · Owner: Alcatel Cit · Inventors: De Seze, Fabrice
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of cellular digital radiocommunication in a time division multiple access system using a geographical cell network having mobile stations (SM1 to SM22) passing therethrough a base station being assigned to each of the cells. A mobile station communicates through the base station associated with the cell in which it is located. The frames of the uplink transmission direction of the mobile stations to the base station comprise at least one shared time interval (IT6) which is assigned to at least two separate mobile stations (SM7 to SM22). According to the invention for each shared time interval (IT6), the system has a list of active mobile stations an active mobile station being a …
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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 May 5, 1995 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2017.
- 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
Timeline From CIPO dates
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.