EXTENDING BACNET SYSTEMS TO SCALE UP TO LARGE TOPOLOGIES

摘要

A Method and a BACnet network system to extend BACnet network systems for building automation systems to scale up to large topologies, wherein the BACnet network system comprises a network of BACnet devices, wherein the network of BACnet devices is organized as a virtual hub-and-spoke network, wherein one of the BACnet devices is implemented as a directed hub-device to which all other BACnet devices are connected as node-devices by using WebSocket connections, wherein the directed hub-device is configured to limit the broadcast distribution of broadcast messages from a downlink-connection to each uplink-connection, and not to any other downlink-connection, and wherein the directed hub-device is configured to block or forward unicast messages from one downlink-connection to another downlink-connection.