207 GOOSE fields order
This tissue has following status: blue
Created: 19 Sep 2005
Clause: Annex A
Category: No impact on this part
Issue: In a GOOSE PDU, Annex C prescribes a certain order of the leading fields. The field IECGoosePdu (improperly named APDU in Annex C) does not prescribe the order of its fields since only the ASN.1 definition is given, in which SEQUENCE fields may come in any order. This makes decoding unnecesserily difficult, since posibly the whole PDU must be parsed to know from the sqNum that nothing has changed.
Proposal: To simplify decoding, the elements of the IECGoosePdu shall be transmitted in order of increasing tag values.