Hi Pablo / Dave all, See my additional comment inline marked [SB]
Regards Sridhar On Wed, Jul 28, 2021 at 12:06 AM Pablo Camarillo (pcamaril) <pcamaril= [email protected]> wrote: > Hi Dave, > > Many thanks for your comments. Inline with PC. > > Cheers, > Pablo. > > -----Original Message----- > From: dmm <[email protected]> On Behalf Of David Allan I > Sent: viernes, 23 de julio de 2021 19:51 > To: [email protected] > Subject: Re: [DMM] Additional questions/comments on > draft-ietf-dmm-srv6-mobile-uplane-13 > > Hi: > > Looking over this draft it strikes me that IF you are discussing a GTP > replacement, there are a few unaddressed gaps...or at least I see no > mention of them. > > - adding X2 to the list of interfaces to be supported > [PC] Do you think there is any new mechanism to be added to the currently > defined ones? > > [SB] If we are including X2 then F1U also needs to be considered. Both X2 and F1U also have GTPU flow control mechanism defined in TS 38.425. I am not sure if a corresponding feedback mechanism exists in SRv6 for flow control. - support for end-marker for handoff stream synchronization (probably > could fit the unused bit in Args.Mob.Session but frankly I have not studied > this in detail) > [PC] User Plane Message encoding is out of the scope of this draft. > However, draft-murakami-dmm-user-plane-message-encoding-03 proposes a > mechanism to encode the Echo Request, Echo Reply, Error Indication, and End > Marker. > > - support for QMP (quality measurement protocol), which I believe needs > to also extend across the radio interface so is not simply local to the GTP > domain and can be "stunt doubled" > [PC] Excellent point. Seems we missed this one in draft-murakami! We can > add in there the QoS Monitoring Packet indicator, as well as the encoding > for the timestamps and average DL/UL delays. > > - support for paging policy presence/indication > [PC] Same as previous. Many thanks. > > [PC], By the way, I've posted an updated revision as the reference to > draft-murakami was missing. > > If this has come up elsewhere, let me know > > Cheers > Dave > > > _______________________________________________ > dmm mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/dmm > > _______________________________________________ > dmm mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/dmm > -- o__ _> /__ (_) \(_)... Burn fat not fuel - Bike along to a healthier life and cleaner world! :) Sridhar Bhaskaran
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