Data retention probes and related methods
US10374913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2016 |
| Grant date | Aug 6, 2019 |
| Priority date | — |
| Expiry date | Jan 26, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data retention probe for a packet-switched, mobile telecommunications network employs interfaces to connect to interfaces carrying traffic on a mobile network side of a gateway node and on a global internet side of the gateway node. A FPGA creates for each packet at least one fingerprint of one or more fields that are unchanged as part of the address translation performed by the gateway node and to create informative metadata for those packets. A processing unit: (1) receives from the FPGA the fingerprints and metadata and maintains flow records for each flow of packets seen on each side of the gateway node; and (2) compares the fingerprints and, where a match is found, determines those packets to be part of the same communication session and creates a record correlating internal IP address or a subscriber identifier to external IP address and port number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.