Power control and cell site location technique for cdma systems with hierarchical architecture
CA 2308902 C · Owner: Valenzuela, Reinaldo A. · Inventors: Valenzuela, Reinaldo A.; Huang, Howard C.; Krishnamoorthy, Rajeev
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multiple microcell base stations are located within a macrocell having a single macrocell base station in an hierarchical architecture and microcell , users , (µ-users) and macrocell users (M-users) communicate respectively with the µ-base and, the M-base using the same frequency band by appropriately (a) selecting the , ratio of the radius r of each µ cell and the average distance d from the M-base (r and d are, measured by the "radio distance" which includes the effects of shadowing) and (b), controlling the power level with which uplink (mobile to base) and downlink (base, to mobile) messages are communicated. Typically µ-cell size and location , are, chosen such that d/r > 10. With …
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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 May 19, 2000 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 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.