Method for fast reconfiguration of GM clocks in the TSN network by means of an explicit teardown message

US10892839B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Feng Chen · Feucht, DE
• Jürgen Schmitt · Fürth, DE

Key dates

• Filing date: May 19, 2016
• Grant date: Jan 12, 2021
• Expiry date: May 19, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L67/12
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The invention relates to a method for fast reconfiguration of GM clocks in the TSN network by means of an explicit teardown message. Carrying out a network-wide cleansing of the outdated information ensures that outdated GM information having a higher priority cannot overwrite new information. The current BMCA+ relies on the hold time mechanism in order to quickly carry out the GM reconfiguration on all nodes. The problem is solved by the introduction of a specific advertising schema for the BMCA+ protocol in order to resolve the described instability during the GM reconfiguration period. The method uses an announce+ message for an extra messaging that displays a clock having outdated information and disseminates new information in the complete network. The aim is to inform all clocks that outdated information is present such that the GM reconfiguration can be carried out quickly and without extra conflicts. This so-called “teardown” notification is provided for the case when a current best clock (that is, either a first or second-best GM clock) lowers its priority in order to become a subordinate clock.