Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SYNCHRONIZING CLOCK SUPPLY CONTROL SYSTEM FOR COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JPH01316043
Kind Code:
A
Abstract:

PURPOSE: To reduce the probability of occurrence of disabled communication between communication equipments due to a fault of a clock supply route by supplying a synchronizing clock with high priority to each communication equipment as a reference clock in response to the state of a communication network.

CONSTITUTION: Clock generating sources 11a, 11b generate a clock supplied to a communication equipment 101 and a clock generating source 11c generates a clock fed to a communication equipment 102. In this case, different priority is given to clocks generated from generating sources 11a-11c and an added number in response to the number of communication equipments transmitted after the occurrence is added to each clock. Then a clock with the highest priority and added with the least added number in the number of communication equipments with the clock transmitted therethrough is selected among plural clocks supplied to the equipments 101-103, the equipment is operated synchronously therewith and the number is incremented by one and the result is outputted. Thus, even in the presence of a fault in the supply route of a communication equipment, synchronization is takes with other communication equipment, normal communication is made available and the communication disabled state is reduced.


Inventors:
FUKUDA HARUKI
Application Number:
JP14696988A
Publication Date:
December 20, 1989
Filing Date:
June 16, 1988
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FUJITSU LTD
International Classes:
H04L7/00; H04J3/06; (IPC1-7): H04L7/00
Attorney, Agent or Firm:
Tadahiko Ito (2 outside)



 
Previous Patent: SIGNAL FREQUENCY SYNCHRONIZER

Next Patent: TIMING CIRCUIT