> I think that it would be nice if we can respond with the acknowledge to >what the LS asked us. That could show that the work is progressing in our >side already.
Ack! That’s what we were thinking too. Sri On 4/16/18, 6:41 AM, "Satoru Matsushima" <[email protected]> wrote: >I think that it would be nice if we can respond with the acknowledge to >what the LS asked us. That could show that the work is progressing in our >side already. > >As per the presentation of the UPPS SID and the LS in the last meeting in >London, existing user plane protocol investigation we have now could be a >content of the response. > >For example, I see that as following: > >1. TS29.281 still refers RFC2460 which doesn’t allow zero UDP checksum >unlike IPv4/GTP-U case. > >2. While TS23.501 allows multihoming in single PDU session. It looks >multipoint-to-point tunnel. > But TS29.281 still seems to keep GTP-U to be p2p tunnel. > >3. Unlike previous generation, TS23.501 allows multiple QFIs in a single >PDU session. > That means that just a single pair of endpoint addresses need to be >handled to steer the data-path for the session in N3 and N9. > >Does anyone observe any other points? > >Best regards, >--satoru > > >> 2018/04/14 8:05、Sri Gundavelli (sgundave) <[email protected]>のメール: >> >> Hi Arashmid, >> >> >> I am not seeing a relation to the LS Response and the July 2018 deadline >> that you are referring to. I think there is some disconnect here. Lets >> review what we the chairs are thinking. >> >> >> 1. The work in IETF related to User-Plane optimizations will continue >>for >> many months. When there is a LS Request, we will send a LS response. We >> will use LS query/response as a means to gather feedback from the SDO >> community, and provide an update on the status of all the documents in >>DMM >> at this time. The status includes update on WG documents and individual >> I-D’s under discussions. >> >> 2. We are not going with the assumption that there will only be a single >> LS request/response for this entire UP Study, but we will keep >>exchanging >> information based on the progress, and whenever we need additional >> clarifications. >> >> 3. There are multiple proposals in IETF. As we have indicated in the >>past, >> we are not going to recommend THE single solution and put it on a >>platter >> for 3GPP consumption, but rather the focus will be on characterization >>of >> each approach that we take up in DMM WG. >> >> Now, keeping this in mind, if there is a good reason not to send the LS >> Response now, delay it by some time, or if we believe there is nothing >>to >> respond, we can discuss and decide to do just that. Hope this makes >>sense. >> >> Bottomline, all feedback is welcome! >> >> >> Sri >> >> >> >> >> On 4/13/18, 1:35 PM, "Arashmid Akhavain" <[email protected]> >> wrote: >> >>> Hi Sri, >>> Thank you for getting back to us. They listed a few dates there. The >>> final deadline is I guess July 2018. >>> Are we targeting anything earlier? >>> >>> Arashmid >>> >>>> -----Original Message----- >>>> From: Sri Gundavelli (sgundave) [mailto:[email protected]] >>>> Sent: 13 April 2018 12:47 >>>> To: Arashmid Akhavain <[email protected]>; [email protected] >>>> Subject: Re: New Liaison Statement, "CP-173160: New Study Item on User >>>> Plane Protocol in 5GC" >>>> >>>> Hi Arashmid, >>>> >>>> We provide the status of the related work items in DMM, and seek any >>>> clarifications on their CT4 work. Key thing from our point of view is >>>> to get >>>> their feedback on the work we are doing and try to meet their >>>>timelines. >>>> >>>> Sri >>>> >>>> >>>> On 4/12/18, 10:53 AM, "Arashmid Akhavain" >>>> <[email protected]> >>>> wrote: >>>> >>>>> Hi Sri, >>>>> >>>>> Any idea what the plan is once we pass this information to CT4? >>>>> >>>>> Arashmid >>>>> >>>>>> -----Original Message----- >>>>>> From: dmm [mailto:[email protected]] On Behalf Of Sri Gundavelli >>>>>> (sgundave) >>>>>> Sent: 12 April 2018 12:47 >>>>>> To: [email protected] >>>>>> Subject: Re: [DMM] New Liaison Statement, "CP-173160: New Study Item >>>>>> on User Plane Protocol in 5GC" >>>>>> >>>>>> Please review and post your comments. Chairs will draft a response >>>>>> for WG review. >>>>>> >>>>>> Sri >>>>>> >>>>>> >>>>>> On 4/11/18, 11:16 AM, "Liaison Statement Management Tool" >>>>>> <[email protected]> >>>>>> wrote: >>>>>> >>>>>>> Title: CP-173160: New Study Item on User Plane Protocol in 5GC >>>>>>> Submission Date: 2018-04-11 URL of the IETF Web page: >>>>>>> https://datatracker.ietf.org/liaison/1572/ >>>>>>> Please reply by 2018-07-20 >>>>>>> From: Satoru Matsushima <[email protected]> >>>>>>> To: Sri Gundavelli <[email protected]>,Dapeng Liu >>>>>>> <[email protected]> >>>>>>> Cc: Dapeng Liu <[email protected]>,Terry Manderson >>>>>>> <[email protected]>,Distributed Mobility Management >>>>>>> Discussion List <[email protected]>,Sri Gundavelli >>>>>>> <[email protected]>,Suresh Krishnan <[email protected]> Response >>>> Contacts: >>>>>>> [email protected],[email protected] >>>>>>> Technical Contacts: >>>>>>> Purpose: For action >>>>>>> >>>>>>> Body: 1. Overall Description: >>>>>>> 3GPP working group of CT4 (Core and Terminal) would like to inform >>>>>>> the IETF that CT4 has initiated a study item on user plane protocol >>>>>>> in 5GC for Release-16 of 5G phase 2 (see CP-173160). >>>>>>> >>>>>>> Based on the outcome from the IETF / 3GPP Coordination meeting at >>>>>>> IETF#100, 3GPP CT4 got aware that IETF DMM WG is currently working >>>>>>> on a possible candidate protocol for the 3GPP 5G user plane >>>> protocol. >>>>>>> >>>>>>> 3GPP CT4 wants to emphasize that currently there is no related >>>>>>> evaluation ongoing in 3GPP. Nevertheless, a study item was approved >>>>>>> for such a study to start in the second half of 2018. The study >>>>>>>will >>>>>>> evaluate between existing solutions within 3GPP and other >>>>>>>protocols, >>>>>>> based on the Release >>>>>>> 16 stage 2 (system architecture) requirements. >>>>>>> >>>>>>> 3GPP CT4 would like to point IETF DMM to the following >>>>>>> specifications on GTP-U. The Release 16 stage 2 requirements are >>>>>>>not >>>>>>> yet known but it is worth looking at latest GTP-U spec which will >>>>>>>be >>>>>>> evaluated through the study as the existing protocol. >>>>>>> >>>>>>> € [1] 3GPP TS 29.281 (V15.1.0): GPRS Tunnelling Protocol User >>>>>>> Plane >>>>>>> (GTPv1-U) >>>>>>> >>>>>>> >>>>>>> Following technical report provides information of how 3GPP >>>>>>> considered GTP-U apply to user plane of 5G_ph1: >>>>>>> >>>>>>> € [2] 3GPP TR 29.891 (V15.0.0): 5G System Phase 1; CT4 Aspects >>>>>>> >>>>>>> >>>>>>> Furthermore, 3GPP would like to give the following general guidance >>>>>>> to IETF DMM, regarding user plane transport within 3GPP networks. >>>>>>> These are technical specifications that include also the necessary >>>>>>> information to understand which architectural, QoS, >>>>>>>security-related >>>>>>> and high-level requirements GTP-U currently complies to within >>>> 5G_ph1. >>>>>>> >>>>>>> € [3] 3GPP TS 23.501 (V15.0.0): System Architecture for the 5G >>>> System >>>>>>> € [4] 3GPP TS 23.502 (V15.0.0): Procedures for the 5G System >>>>>>> € [5] 3GPP TS 23.503 (V15.0.0): Policy and Charging Framework for >>>> the >>>>>> 5G >>>>>>> System >>>>>>> € [6] 3GPP TS 33.501 (V0.6.0): Security Architecture (work in >>>> progress) >>>>>>> >>>>>>> 2. Actions: >>>>>>> To IETF DMM: >>>>>>> ACTION: CT4 respectfully asks IETF DMM to provide any >>>>>>> information >>>>>> that >>>>>>> may be relevant to the above CT4 work by July 2018. >>>>>>> >>>>>>> >>>>>>> 3. Date of Next CT and CT4 Meetings: >>>>>>> CT4#83 26th Feb 2nd Mar 2018 Montreal, CAN >>>>>>> CT#79 19th 20th Mar 2018 Chennai, India >>>>>>> CT4#84 16th 20th April 2018 Kunming, China >>>>>>> CT4#85 21st 25th May 2018 Osaka, Japan >>>>>>> CT#80 11th 12th June 2018 La Jolla, USA >>>>>>> CT4#85-bis 9th 13th July 2018 TBD, France >>>>>>> CT4#86 20st 24th Aug 2018 TBD, USA >>>>>>> Attachments: >>>>>>> >>>>>>> CP-180116 >>>>>>> >>>>>>> >>>>>>>https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2018-04-11-3gp >>>>>>> p-t >>>>>>> sgc >>>>>>> >>>>>>>t-ct4-dmm-cp-173160-new-study-item-on-user-plane-protocol-in-5gc-att >>>>>>> ach >>>>>>> men >>>>>>> t-1.doc >>>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> dmm mailing list >>>>>> [email protected] >>>>>> https://www.ietf.org/mailman/listinfo/dmm >>> >> >> _______________________________________________ >> dmm mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/dmm > _______________________________________________ dmm mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmm
