Mobile terminating call retry logic for multiple radio access technology types
US11277717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2019 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Jan 19, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An Internet Protocol Multimedia Subsystem (IMS) application server can initially attempt to route a terminating call invite to a user equipment (UE) via a packet-switched (PS) domain radio access network (RAN). However, if that initial attempt fails, the application server can follow either a PS retry option to reattempt routing the terminating call invite via a PS-domain RAN, or a circuit-switched (CS) retry option to instead reattempt routing the terminating call invite via a CS-domain RAN. In some examples, if Home Subscriber Server (HSS) data indicates that the UE is connected to a Long-Term Evolution (LTE) RAN and that CS-domain location information for the UE is older than a threshold, the application server can enable the PS retry option. However, if the UE is connected to an LTE RAN but the CS-domain location information is more recent than the threshold, the application server can instead enable the CS retry option.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.