Method and device for determining a synchronization fault in a network node
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorStefano Ruffini
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method and device for determining a synchronization fault in a synchronization network, where values of a clock control parameter associated with the synchronization control in a node are compared with a predicted mask value for said clock control parameter, and a synchronization fault is determined if one or more of the measured values lies outside of the predicted mask.
Claims15
A method for determining a synchronization fault in at least one node of a network, said network comprising a traffic network and an associated synchronization network, where said synchronization network supplies network synchronization information to said node, said method comprising:
- measuring values of a clock control parameter associated with synchronization control in said node, said clock control parameter depending on internal factors associated with said node and on said network synchronization information,
- comparing said measured values with a value range calculated on the basis of a prediction model of said clock control parameter, in order to determine if said measured values lie in said value range, where said prediction model takes into account said internal factors, and
- determining a synchronization fault in said node if a predetermined number of measured values lies outside of said value range.
A fault determination device for a node of a network, said network comprising a traffic network and an associated synchronization network, comprising:
- a synchronization control device that is arranged to receive network synchronization information from said synchronization network and to synchronize actions in said node with said network synchronization information, comprising a clock device that is controlled by a clock control parameter, said clock control parameter depending on internal factors associated with said node and on said network synchronization information,
- a measuring device for measuring values of said clock control parameter,
- a calculating device for calculating a value range on the basis of a prediction model of said clock control parameter where said prediction model takes into account said internal factors,
- a comparing device for comparing said measured values with said value range, in order to determine if said measured values lie in said value range, and
- a fault determining device for determining a synchronization fault in said node if a predetermined number of measured values lies outside of said value range.
A method for determining a synchronization fault in at least one node of a network, said network comprising a traffic network and an associated synchronization network, where said synchronization network supplies network synchronization information to said node, said method comprising:
- measuring values of a control voltage of a voltage controlled oscillator that is arranged in a phase locked loop for performing synchronization control in said node, said control voltage depending on internal factors associated with said node and on said network synchronization information,
- comparing said measured values with a value range calculated on the basis of a prediction model of said control voltage, in order to determine if said measured values lie in said value range, where said prediction model takes into account said internal factors, and
- determining a synchronization fault in said node if a predetermined number of measured values lies outside of said value range.
Dependencies are inferred from the claim text.