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Expired Canadian patentCanada

A network flow framework for online dynamic channel allocation

CA 2209351 C · Owner: Shivakumar, Narayanan · Inventors: Agrawal, Prathima; Narendran, Balakrishnan; Shivakumar, Narayanan

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Abstract From the Canadian patent

The invention relates to a dynamic channel allocation system for a mobile communication system wherein mobile units communicate with the base station on allotted channels. The channel allocations are determined according to a framework of network flows including flow paths with nodes representing active mobile units base stations, and channels used for communication between active mobile units and their respective base stations. A new call from a mobile unit is added by finding the shortest available augmenting path for the added unit. The edges between nodes can include cost and capacity factors which can be used to determine desirable reconfigurations for the network.

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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 June 30, 1997 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 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.
FiledJune 30, 1997
GrantedJuly 3, 2001
Term endedJune 30, 2017
Patent numberCA 2209351 C
Classification (IPC)H04W16/10

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedJune 30, 1997Patent grantedJuly 3, 2001Term endedJune 30, 2017

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.