Preventing a network from propagating incorrect time information
US10015004B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2016 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Feb 23, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Prior to joining a device to a network, the device is connected to an external system via a local connection. The external system provides the device with a local time stamp that includes a local time value and a local time error value. The device may use the time information to communicate with the external system. After the device is joined to the network, the device may transmit a communication on the network that includes time information. If so, then the communication includes a time value based on the device's time value and a time error value set to a value indicating a maximum error. The network is protected from potentially poor quality time information. Any device that receives the communication rejects the time information since the time error value indicates a maximum error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.