Handoff in dormant mode in a packet data network
CA 2761980 C · Owner: Qualcomm Incorporated · Inventors: Mahendran, Arungundram C.; Hsu, Raymond T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mobile unassisted dormant handoff in a wireless communication system supporting packet data communications. While in a dormant mode a mobile node may change packet zones, wherein different packet zones are serviced by at least one different infrastructure element without identifying the change to the system. The change in packet zone does not necessarily trigger establishment of a communication path for the mobile node until there is packet data ready for communication. In one embodiment mobile assistance is adapted to the system and is disabled at the mobile node by an indication in a system parameter message transmitted by the system and received by the mobile node.
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 October 9, 2003 and granted January 5, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2025.
- 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.