DISTRIBUTED NETWORK SYNCHRONIZATION SYSTEM

摘要

"DISTRIBUTED NETWORK SYNCHRONIZATION SYSTEM" A synchronization system is provided for a tree-type transmission system comprising a central station connected to a plurality of remote stations in an effectively sequential manner, each station including transmitting and receiving means for digital data in a sequence of frames. Each remote station is instructed regularly by the central station of the time delay between the remote station and the central station. The remote station stores the time delay and arranges to advance information transmitted by the remote station so as to be received by the central station within the proper position in the frame. The time delay is measured by the central station by sensing a pattern of bits repetitively transmitted by the remote station and comparing the received pattern with a stored pattern and counting the number of shifts of the received pattern necessary to match the stored pattern. The delay stored by the remote station is tuned to one quarter of a bit to ensure accurate synchronization.