SECURISATION PAR DOUBLEMENT D'AU MOINS CERTAINES VOIES LOGIQUES DANS UN RESEAU DE TELECOMMUNICATIONS

摘要

The network incorporates mixers (B1-B3) which perform a switching function at the virtual path level. Switches (C1-C3) constitute interfaces to end users (U1-U4) and perform a switching function at the virtual circuit level. Between two nodes, at least one standby channel is associated with the main channel for conveying the same packets. The second node is equipped to switch between a main channel and a standby channel after calculating the discrepancy between the respective propagation times. Allowance is made for this discrepancy by controlling the switching to avoid packet loss or duplication.