System and method for dynamic channel assignment
CA 2217288 C · Owner: At&T Corp. · Inventors: Barnickel, Donald J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for providing dynamic channel assignments in a microcellular system surrounded by a macrocellular system. The method characterizes the RF environment of the microcellular system and the macrocellular environment. Channels are then ranked according to the signal-to-interference ratio computed from the measured RF characteristics. A call is assigned to a highest ranked idle channel. All active calls are monitored to ensure voice quality and call performance by forcing hand-off to another channel before degradation occurs. In another embodiment the system is self-configurable, to changes in the macrocellular configuration by including remote power adjustment and remote …
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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 2, 1997 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2019.
- 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.