XMPP, XML, and MMS: Two New TC 57 CDVs available for Public Comments

IEC TC 57 has published the following two CDV documents and allows you access to them:

57/1823/CDV
IEC 61850-8-1/AMD1 ED2: Amendment 1 - Communication networks and systems for power utility automation - Part 8-1: Specific communication service mapping (SCSM) -
Mappings to MMS (ISO 9506-1 and ISO 9506-2) and to ISO/IEC 8802-3

57/1833/CDV
IEC 61850-8-2 ED1: Communication networks and systems for power utility automation - Part 8-2: Specific communication service mapping (SCSM) -
Mapping to Extensible Messaging Presence Protocol (XMPP) 

You can study these two documents and provide comments.

Click HERE for the access (need to register only).

XMPP is used here to transport the XML message payloads between IEC 61850 server and client. The main contents of the messages are MMS messages (defined in ASN.1) and encoded with ASN.1 XER (XML encoding rule) - instead of ASN.1 BER (basic encoding rule). 

Example (excerpt):

Quite interesting. Most of what you have understood of MMS (subset used in IEC 61850-8-1) is applicable for 8-2 as well.

Click HERE for an introduction to ASN.1 and a discussion of why we need encoding rules.