Signalling method for establishing trunked communication
CA 1270525 C · Owner: Zdunek, Kenneth John · Inventors: Zdunek, Kenneth John; Sasuta, Michael David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A trunked communication signalling method is provided by a unifying signalling protocol in which subscribers (102, 104) request communication channels (106) using only their individual IDs (404) encoded into single ISWs (402). The central (110) decodes the call reguest, extracts the requesting subscriber's individual ID, which is cross referenced to determine the subscriber's talk-group affiliation(s). If the requesting subscriber's affiliation(s) are not known the, central commands the subscriber to transmit its affiliation using dual ISW signalling (408). In another aspect of the present invention, each subscriber automatically informs the central of a change in talk-group …
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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
- Granted June 19, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 2007.
- 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.