Hi Balazs, Do you have an example of where O-RAN is trying to deviate a 3GPP model? I would agree that for O-RAN to deviate a model would be a problem, and that it should be left to vendors to decide if they want to deviate the 3GPP model.
> On Nov 18, 2020, at 12:09 AM, Balázs Lengyel > <balazs.lengyel=40ericsson....@dmarc.ietf.org> wrote: > > Hello, > In connection to the draft > https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01 > <https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01> I propose to > send a liaison statement from IETF Netmod to ORAN. > > The issue: 3GPP is standardizing a good number of YANG modules as part of the > 3gpp TS 28.541 and 28.623 > (https://forge.3gpp.org/rep/sa5/MnS/tree/Rel17-draft/yang-models > <https://forge.3gpp.org/rep/sa5/MnS/tree/Rel17-draft/yang-models>). > ORAN plans to re-use this models, but possibly refine them in some ways. They > are considering using deviations to do this. > E.g. change config=true schemas node to config=false. This creates problems > as documented in > https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01#section-5.8.1 > <https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01%23section-5.8.1> > > - Deviations by an SDO (standard defining organization) prevent > implementations from reporting their own deviations for the same nodes. > - Deviations by an SDO prevent implementations from conforming to the > standards specified by both SDOs. > > To avoid these problems I propose to send the following text to ORAN: > > “IETF NETMOD working group requests ORAN to avoid using deviations as part of > its specification. As documented in > https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01#section-5.8.1 > <https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01%23section-5.8.1> > the usage of deviations would prevent: > Vendors to implement their own deviations for the same YANG schema nodes > Vendors to claim conformance to both ORAN and 3GPP specifications which are > in some cases used as a base for the ORAN YANG models > Note: These problems with deviations exists even if YANG modules are used > without using YANG packages. > Regards Balazs > > -- > Balazs Lengyel Senior Specialist > Ericsson Hungary Ltd. > Mobile: +36-70-330-7909 email: balazs.leng...@ericsson.com > <mailto:balazs.leng...@ericsson.com> > > _______________________________________________ > netmod mailing list > netmod@ietf.org <mailto:netmod@ietf.org> > https://www.ietf.org/mailman/listinfo/netmod > <https://www.ietf.org/mailman/listinfo/netmod> Mahesh Jethanandani mjethanand...@gmail.com
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