MESSAGE CHAINING TRANSMISSION PROCESS AND SYSTEM FOR DATA BASES.

摘要

THIS INVENTION CONSISTS IN A PROCESS AND IN A TRANSMISSION SYSTEM OF CHAIN OF DATABASE UPDATING MESSAGES BETWEEN A MANAGING CENTRE AND A PLURALITY OF SUBSCRIBER DATABASES GEOGRAPHICALLY SHARED. EACH MESSAGE INCLUDES A CHAIN IDENTIFIER (FM) AND A CHAIN INDEX (FI) ALLOWING TO IDENTIFY THE MESSAGE IN THE CHAIN. IF A MESSAGE IS NOT RECEIVED FOLLOWING AN INTERFERENCE IN THE CONNECTION, THE PROCESSING OF FOLLOWING MESSAGE CAN CAUSE THE LOCKING OF DATABASES. IN ORDER TO AVOID THIS DRAWBACK, THE SOLUTION CONSISTS IN ADDING TO EACH MESSAGE A CONDITION BLOCK (CD) WHICH DETERMINES IF THIS MESSAGE HAS TO BE PROCESSED WITHOUT REFERENCE TO ELEMENT OF THE CHAIN OR WHICH ARE THE CONDITION LINKED TO THE PREVIOUS PROCESSING OF ELEMENTS OF THE CHAIN.(FIGURE 3)