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Standards Development
This European Standard specifies the transporting of the Control Network Protocol (CNP) packets for commercial Building Automation, Controls and Building Management over Internet Protocol (IP) networks using a tunnelling mechanism wherein the CNP packets are encapsulated within IP packets. It applies to both CNP nodes and CNP routers.
The purpose of this European Standard is to ensure interoperability between various CNP devices that wish to use IP networks to communicate using the CNP protocol.
The main body of this European Standard is independent of the CNP protocol being transported over the IP network.
The reader is directed to Annex A and Annex B for the normative and informative, respectively, aspects of this specification that are specific to EN 14908-1. Figure 1 shows a possible configuration of such CNP devices and networks connected to an IP network. Figure 1 depicts two types of CNP devices: CNP nodes and CNP routers. It should be noted that the routers shown can route packets between typical CNP channels (such as twisted pair or power line) and an IP channel or it can route CNP packets between two IP channels. In this European Standard the IP channel will be defined in such a way to allow it to be used like any other CNP channel.
In the above diagram, the IP network can be considered to be one or more IP channels. This European Standard covers only how CNP packets are transported over IP channels. It does not cover how CNP packets are routed between standard CNP channels and IP channels. This specification is not intended to cover the lower layers (physical, MAC and link layers) of either standard CNP or IP channels.
This proposal addresses changes to EN 14908-4:2014, which specifies the transport of EN 14908-1 Control Network Protocol (CNP) packets for building automation and building management systems over Internet Protocol (IP) networks using a tunnelling mechanism. Since the publication of the current edition, cybersecurity requirements and best practices for authentication mechanisms in networked systems have significantly evolved. The authentication methods defined in the existing standard no longer fully reflect the current state of the art for secure IP-based communications.
The proposed revision will therefore focus on updating the authentication mechanisms used for CNP communication over IP networks. The objective is to improve the security of device communication while maintaining interoperability between devices and routers using CNP. The work will review the current authentication approach and define updated mechanisms aligned with modern cybersecurity practices and contemporary IP networking environments.
The revision may also include clarifications and minor technical updates necessary to support the improved authentication framework and to ensure consistent implementation.
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