Method and apparatus for performing idle handoff in a multiple access communication system
CA 2660735 C · Owner: Qualcomm Incorporated · Inventors: Tiedemann, Edward G. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus which permits handoffs while the mobile station (2) is in the system access state. This is achieved by providing for channel assignment messages to be sent over the paging channel of a plurality of base stations (26) which increases the probability of one of the messages getting through. In addition this assures the mobile station (2) will be able to handoff to a different base station (26) and have a traffic channel allocated to it on the new base station (26) without delay. In addition a method and apparatus which permits the mobile station (2) to be directly assigned into a soft handoff state upon traffic channel assignment.
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 6, 1997 and granted July 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 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.