Session initiation protocol (sip) based user initiated handoff
CA 2547666 C · Owner: Interdigital Technology Corporation · Inventors: Shaheen, Kamel M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for providing a solution to the handoff problem includes a handoff is triggered by the WLAN network 14 assuming that there is a real time session between PC 12 and a called party shown at S1. WLAND network 14 , communicates with IP network 18 shown at S2, the IP network 18 provides the two-way communication between the PC 12 and service server 22 shown at S3. , Both the user PC 12 and UE 32 establish a connection with the network 23 at S4- S6. The user then decides to trigger a handoff from PC 12 to the UE 32 at S7 and communicates this handoff request to the WLAN network 14 which transmits , an SIP message through IP network 18 to service server 22. Service server …
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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 November 30, 2004 and granted September 4, 2018. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.