DetNet Bounded Latency
draft-finn-detnet-bounded-latency-02

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DetNet                                                           N. Finn
Internet-Draft                               Huawei Technologies Co. Ltd
Intended status: Standards Track                          J-Y. Le Boudec
Expires: April 25, 2019                                  E. Mohammadpour
                                                                    EPFL
                                                                J. Zhang
                                             Huawei Technologies Co. Ltd
                                                                B. Varga
                                                               J. Farkas
                                                                Ericsson
                                                        October 22, 2018

                         DetNet Bounded Latency
                  draft-finn-detnet-bounded-latency-02

Abstract

   This document presents a parameterized timing model for Deterministic
   Networking (DetNet), so that existing and future standards can
   achieve the DetNet quality of service features of bounded latency and
   zero congestion loss.  It defines requirements for resource
   reservation protocols or servers.  It calls out queuing mechanisms,
   defined in other documents, that can provide the DetNet quality of
   service.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on April 25, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Finn, et al.             Expires April 25, 2019                 [Page 1]
Internet-Draft           DetNet Bounded Latency             October 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   4
   3.  Terminology and Definitions . . . . . . . . . . . . . . . . .   4
   4.  DetNet bounded latency model  . . . . . . . . . . . . . . . .   4
     4.1.  Flow creation . . . . . . . . . . . . . . . . . . . . . .   4
     4.2.  Relay system model  . . . . . . . . . . . . . . . . . . .   5
   5.  Computing End-to-end Latency Bounds . . . . . . . . . . . . .   7
     5.1.  Non-queuing delay bound . . . . . . . . . . . . . . . . .   7
     5.2.  Queuing delay bound . . . . . . . . . . . . . . . . . . .   8
       5.2.1.  Per-flow queuing mechanisms . . . . . . . . . . . . .   8
       5.2.2.  Per-class queuing mechanisms  . . . . . . . . . . . .   8
   6.  Achieving zero congestion loss  . . . . . . . . . . . . . . .  10
     6.1.  A General Formula . . . . . . . . . . . . . . . . . . . .  10
   7.  Queuing model . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Queuing data model  . . . . . . . . . . . . . . . . . . .  11
     7.2.  Preemption  . . . . . . . . . . . . . . . . . . . . . . .  13
     7.3.  Time-scheduled queuing  . . . . . . . . . . . . . . . . .  13
     7.4.  Time-Sensitive Networking with Asynchronous Traffic
           Shaping . . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.5.  IntServ . . . . . . . . . . . . . . . . . . . . . . . . .  15
   8.  Time-based DetNet QoS . . . . . . . . . . . . . . . . . . . .  19
     8.1.  Cyclic Queuing and Forwarding . . . . . . . . . . . . . .  19
     8.2.  Time Scheduled Queuing  . . . . . . . . . . . . . . . . .  19
   9.  Parameters for the bounded latency model  . . . . . . . . . .  20
     9.1.  Sender parameters . . . . . . . . . . . . . . . . . . . .  20
     9.2.  Relay system parameters . . . . . . . . . . . . . . . . .  21
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     10.2.  Informative References . . . . . . . . . . . . . . . . .  22
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