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BACnet IT

BACnet IT goal review. Trend: convergence of IT

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BACnet IT

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    1. BACnet IT September 8th, 2010 teleconference topics overview

    2. BACnet IT goal review Trend: convergence of IT & BAS infrastructure Can we design a “next-gen” IT-friendly BACnet Multiple standards bodies are working on new protocols for: Sensor networks Energy management and other “ubiquitous” networking applications These newer standards use Aggressive Internet technologies like http, REST, XML, ... The core value of BACnet is in the object model This should be retained largely unchanged This would ensure interoperability between current BACnet & BACnet IT

    3. Things BACnet IT must fix BBMDs Difficult to configure Fragile (breaks if IT changes your IP subnets) Broadcasts that span multiple subnets Risk of broadcast storms Excessive bandwidth usage Can cause non-linear network degradation as the network size grows Layer violations Network addresses leak into application layer Doesn’t transit NATs Breaks if IT changes your network addresses

    4. Things BACnet IT could fix Address space management Many address spaces: Device name, Device ID, BACnet network number, base network layer addresses = difficult to maintain! Improve firewall traversal BACnet not recognized by firewalls Use of more standard/Aggressive technologies Replace BACnet services with comparable Internet standards (e.g. NTP, FTP)

    5. Minimal vs. Aggressive Minimal Change only what needs to be changed IT friendliness IP-based network layer, clean IPv6 support Ease deployment and manageability Aggressive Make more substantial changes Bias toward more modern protocols (SSL, HTTP, REST, etc.) Aggressively eliminate other BACnet services in favor of established Internet protocols (e.g. FTP, NTP, Atom) A clean break from the past – an opportunity to rethink BACnet’s object and services model

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