Method of perch channel transmission and cell selection in cdma mobile communication system
CA 2207032 C · Owner: Onoe, Seizo · Inventors: Ohno, Kouji; Onoe, Seizo; Nakamura, Takehiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A perch channel transmission and cell selection method for a CDMA mobile communication system which is capable i increasing a system capacity by reducing an amount of interference power. In this method, each base station intermittently transmits a perch channel which is spread by using a spread code assigned to each base station. Then a, mobile station receives more than one perch channels transmitted from more than one base stations measures a, receiving level of an intermittently transmitted portion of each received perch channel, and judges a located cell according to measured receiving levels of these more than one perch channels.
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 June 3, 1997 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 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
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.