Austauschprotokoll für digitale Daten

摘要

A packet communications network 10, 12 connects two or more control devices 14, 16, 18 and 20 in a home electrical management system. The digital data exchange protocol comprises the use of Carrier Sense Multiple Access/Collision Detection protocol (CSMA/CD as shown in figure 2), having an additional frame (figure 3) in the packet to initiate a TDM communication period during which the status of each device can be transmitted to each other device connected to the network. The protocol allows the flexibility of CSMA/CD to be used while using the speed of the TDM frame to gain status information. <IMAGE>