PTP Clock Source Discovery Over IP/MPLS Without Manual Provisioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for PTP synchronization in IP/MPLS networks require manual provisioning of IP addresses for candidate master clocks, which is inefficient and labor-intensive, especially when the list of potential master clocks changes.
Innovation Solution
A system and method that allows PTP master clock nodes to advertise their capabilities over IP networks using Interior Gateway Protocols (IGP), enabling automatic discovery and unicast signaling mechanisms for client nodes to identify and synchronize with the best master clock without manual IP address configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual configuration methods are used for PTP clock sources, then device complexity is reduced, but setup time and productivity are significantly increased
Solution Approach 1:
The system enables automatic self-discovery of PTP clock sources through protocol announcements and automated configuration, eliminating manual intervention. Network devices automatically announce their PTP capabilities and clock quality, and the system autonomously selects and configures optimal clock sources without human operation.
Solution Approach 2:
The system dynamically changes operational parameters including PTP protocol versions (v1/v2), clock quality levels (grandmaster, slave, boundary clock), and selection criteria based on network conditions. These parameter variations enable adaptive optimization of time synchronization without manual reconfiguration.
2Productivity
If automatic PTP clock source discovery is implemented, then productivity is improved, but device complexity and protocol requirements increase
Solution Approach 1:
The system implements multi-functional capability to handle multiple PTP protocol versions (v1 and v2), various clock source types (grandmaster, boundary clock, ordinary clock), and different transport protocols (UDP, multicast, unicast). This universal approach consolidates multiple specialized functions into a single automated discovery mechanism.
Solution Approach 2:
The system employs feedback mechanisms where PTP announcements propagate clock source information throughout the network, and receiving devices respond with status and capability information. This bidirectional feedback enables automated selection and configuration based on real-time network conditions and device capabilities.
3Reliability
If comprehensive PTP clock source discovery is performed, then reliability of time synchronization is improved, but measurement and detection difficulty increases
Solution Approach 1:
The system performs preliminary discovery actions by sending PTP announcement messages before actual time synchronization operations. This advance detection of available clock sources and their qualities allows the system to pre-select optimal sources and prepare configuration parameters, ensuring reliable synchronization from the outset.
Solution Approach 2:
The discovery process is segmented into distinct phases: announcement message transmission, response collection, quality assessment, and selection decision. This segmentation breaks down the complex detection task into manageable steps, each handling specific aspects of clock source evaluation independently.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Aspects of the subject disclosure may include, for example, a device that includes a processing system including a processor; a clock; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations of: advertising a capability as a precision timing protocol (PTP) master clock through an Internet Protocol (IP) network, wherein the advertising includes an IP address of the device; receiving a unicast signaling mechanism from a PTP client node in the network; and sending clock messages to the PTP client node responsive to accepting the PTP client node. Other embodiments are disclosed.