Protection against unsolicited communication for internet protocol multimedia subsystem
US9225751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2009 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Jan 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/1104
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A PUCI system is designed to process an incoming call originated by the user equipment toward the counterpart user equipment via an EMS node having a PUCI-light functionality, which includes an IBCF/I-CSCF, a S-CSCF, and a database storing the PUCI-light information. Through a query to the database indicating a suspicious session in relation to the incoming call, the IMS node immediately blocks the suspicious session or simply marks the suspicious session for the further processing at a subsequent node. The reason for rejection is included in a SIP BYE/ERROR message of an original session setup message, which is interpreted by a previous IMS node so as to obtain the relevant information from a SIP header. The relevant information is stored in either a global operator policy database or a local database, thus enabling a PUCI-negating IMS node to reject an unsolicited call related to the blocked session.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.