Resources Contact Us Home
Method and apparatus for precision time distribution in telecommunication networks

Image Number 2 for United States Patent #4926446.

A series of nodes in a telecommunications network are connected by a bi-directional transmission path. An outgoing signal passes each of the intermediate nodes in the path and sets a counter timing at each intermediate node. The outgoing signal then returns from the loop node with time information attached to it. As the returning trigger signal passes the intermediate nodes, the intermediate nodes stop counting the elapsed time since the trigger signal passed the intermediate node, and latches the time information. Precision time synchronization information is then determined for each intermediate node by halfing the two way travel time from the intermediate node to the loop node, adjusting for propagation and processing delays, and adding it to the time information from the loop node.

  Recently Added Patents
Powerline communication receiver
Hand mixer
Systems and methods for minimization or elimination of diffusion effects in a microfluidic system
High performance adaptive switched LED driver
Storage device performance alignment notification
Image display device and display unit for image display device
Sense-amplifier monotizer
  Randomly Featured Patents
Multiple patient monitoring system for proactive health management
Direct labeling of antibodies and other protein with metal ions
Process for receiving spread-spectrum signals
Indirect latex test for determination of fibrinogen degradation products
Advanced patient management with composite parameter indices
Method of determining the direction of application of gradient magnetic field for the detection of diffusive motion, method of measuring the diffusion coefficient, and MRI apparatus
Desk set
Array substrate and method of manufacturing the same
Table editing apparatus and method thereof
Jitter measurement apparatus, jitter calculator, jitter measurement method, program, recording medium, communication system and test apparatus