Soft handoff across different networks assisted by an end-to-end application protocol
CA 2515902 C · Owner: Qualcomm Incorporated · Inventors: Li, Peng; Mahendran, Arungundram C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for soft handoff across different networks is disclosed. A first communication link (106, 1106) through a first network (104a 1104a) is used , for communicating between a first user agent (102a 1102a) and a second user , agent (102b 1102b). The user agents negotiate to use a second communication link (108, 1108) for the same call. The second communication link is established through a second network (104b 1104b) between the first user , agent and the second user agent while maintaining the first communication link. Related data is sent through the first communication link and the second communication link such that the related data is for the same call. The first …
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 February 12, 2004 and granted March 21, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2026.
- 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.