Subject: [DMM] New Liaison Statement, "DMM WG Response to 3GPP CT4 on LS CP-173160 (New Study Item on User Plane Protocol in 5GC )"

From: Liaison Statement Management Tool <[email-masked]>
Date: Fri, 20 Jul 2018 17:11:07 -0700

Title: DMM WG Response to 3GPP CT4 on LS CP-173160 (New Study Item on User Plane Protocol in 5GC )
Submission Date: 2018-07-20
URL of the IETF Web page: https://datatracker.ietf.org/liaison/1587/

From: Sri Gundavelli <[email-masked]>
To: [email-masked],[email-masked]
Cc: Dapeng Liu <[email-masked]>,Terry Manderson <[email-masked]>,Distributed Mobility Management Discussion List <[email-masked]>,Sri Gundavelli <[email-masked]>,Suresh Krishnan <[email-masked]>
Response Contacts: Sri Gundavelli <[email-masked]>,Dapeng Liu <[email-masked]>
Technical Contacts: Sri Gundavelli <[email-masked]>
Purpose: In response

Referenced liaison: CP-173160: New Study Item on User Plane Protocol in 5GC (https://datatracker.ietf.org/liaison/1572/)

Body: Dear Georg & CT4 Group,

Thank you for your Liaison request (Reference: [1572] CP-173160), sharing information on the status of the CT4 study item on user plane protocol in 5GC. The IETF DMM working group acknowledges your request and would like to share the following update.

The DMM working is currently reviewing various proposals on approaches for realizing optimizations in mobile user-plane. These proposals include protocol specifications based on new/existing protocols, and proposals covering requirements/analysis/comparison of various approaches, and building proof of concept demos . At this point of time, some of these documents are working group documents and some are individual submissions and which are yet to be adopted as working group documents. The working group is actively discussing these proposals and making good progress. Based on the working group interest, feedback charter-scope, the working group may choose to adopt some of these work items as working group documents and will move them on standardization track.

We also would like to state that the DMM working group will not be in a position to pick a single approach/solution as THE approach for user-plane optimization. Most likely the working group may standardize more than one approach, but will characterize each of these approaches based on its technical capabilities and limitations. This approach would be consistent with the approach that IETF took with IPv6 transitioning work, where IETF standardized multiple approaches.

Finally, IETF would like to point 3GPP to the following documents under consideration.

http://www.ietf.org/id/draft-bogineni-dmm-optimized-mobile-user-plane-01.txt (Individual submission)
https://www.ietf.org/internet-drafts/draft-hmm-dmm-5g-uplane-analysis-00.txt (Individual submission)

Other Related Documents:
https://www.ietf.org/id/draft-ietf-dmm-srv6-mobile-uplane-02.txt (Working group document)

Link to DMM Pages:
https://datatracker.ietf.org/wg/dmm/documents/

Please let us know if you need any additional information. Also please provide any evaluation criteria that could help us in progressing our work to support 5G.

Regards
Dapeng Liu & Sri Gundavelli
(Chairs for DMM Working Group)
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