Method and apparatus for concurrently processing multiple calls in a spread spectrum communications system
CA 2380411 C · Owner: Sinnarajah, Ragulan · Inventors: Tiedemann, Edward G. Jr.; Sinnarajah, Ragulan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Techniques to enable the processing of multiple calls in a spread spectrum communications system (100). The call processing state machines defined by the CDMA standards (e.g. IS-95 and IS-2000) are modified to include a "traffic channel" substate indicative of the mobile station (106) processing at least one active call. Call control (CC) state machines of various types are also provided to control the processing of the calls. To process one or more calls concurrently, a CC state machine is instantiated upon receiving an indication to process a particular call. The instantiated CC state machine is identified with, and used to control the processing of the particular call. Upon , …
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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 August 11, 2000 and granted January 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2022.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.