Channel sharing in a mixed macro/micro cellular system
CA 2176832 C · Owner: Brodie, Iain Richard · Inventors: Brodie, Iain Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cellular radio system includes three neighbouring cells (A3 A2, A1) which each have a number of channels (1 to 13 14 to 26, 27, to 39, respectively) allocated for their use. A microcell M contained within cell (A1) is served by a separate base station. The microcell has available to it channels (1 to 16 and 21 to 26) from the allocations of neighbouring cells (A2 and A3). The base stations (A2 A3 and, M) are controlled such that no channel is in use simultaneously in both the microcell (M) and cell (A2 or A3). This arrangement allows channels to be reallocated between neighbouring cells according to demand without reducing the peak capacity in individual cells.
Read the whole patent
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 December 2, 1994 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2016.
- 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.