Hi CATS WG, Following the comments about the presentation from the IETF 122 meeting, This is the updated version of the document "Additional CATS requirements for Service Segmentation-related use cases". https://datatracker.ietf.org/doc/draft-dcn-cats-req-service-segmentation/ In short, this updated version discuss:
*1. Service Segmentation characteristics:* - Service is segmented into multiple smaller subtasks. - Subtasks also have multiple instances. - Subtasks are transparent to users. Suppose users request the original service via its service ID. Traffic steering to subtasks is handled by CATS system *2. Differences that Service Segmentation cause to the CATS system (Detailed in Section 3)* - Normal CATS: Request is served by a single optimal service instance - Service Segmentation CATS: Request is served by the result combination of these subtasks. An optimal subtask combination includes one optimal instance of each subtask *3. Possible CATS requirements caused by these differences: (Detailed in Section 4)* - R1: A CATS system should provide a method to distinguish different CATS candidate paths corresponding to different service subtask instance combinations. - R2: A CATS system should provide a method to deliver the service request to the determined optimal service subtask instance combination in correct order and correct composition. - R3: A CATS system should provide a method to map the service request to corresponding segmented subtasks if the original service is not existed, only subtask instance endpoints are available. *These Differences and Requirements are explained by 2 examples in Section 5 where Service Segmentation is applied in 2 CATS use cases: AR and Federated Learning model training* We're looking forward to your feedback! Best regards, Minh-Ngoc ---------- Forwarded message --------- From: <[email protected]> Date: Tue, Mar 25, 2025 at 8:11 PM Subject: New Version Notification for draft-dcn-cats-req-service-segmentation-01.txt To: Minh-Ngoc Tran <[email protected]>, Younghan Kim < [email protected]> A new version of Internet-Draft draft-dcn-cats-req-service-segmentation-01.txt has been successfully submitted by Minh-Ngoc Tran and posted to the IETF repository. Name: draft-dcn-cats-req-service-segmentation Revision: 01 Title: Additional CATS requirements consideration for Service Segmentation-related use cases Date: 2025-03-25 Group: Individual Submission Pages: 12 URL: https://www.ietf.org/archive/id/draft-dcn-cats-req-service-segmentation-01.txt Status: https://datatracker.ietf.org/doc/draft-dcn-cats-req-service-segmentation/ HTML: https://www.ietf.org/archive/id/draft-dcn-cats-req-service-segmentation-01.html HTMLized: https://datatracker.ietf.org/doc/html/draft-dcn-cats-req-service-segmentation Diff: https://author-tools.ietf.org/iddiff?url2=draft-dcn-cats-req-service-segmentation-01 Abstract: This document discusses possible additional CATS requirements when considering service segmentation in related CATS use cases such as AR-VR and Distributed AI Training The IETF Secretariat -- __________________________________ *Minh-Ngoc Tran* IISTRC - Internet Infra System Technology Research Center 369, Sangdo-ro, Dongjak-gu, Seoul, Republic of Korea, 06978 Tel : +82-2-820-0841 Email: [email protected] __________________________________
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