New Spin bit enabled measurements with one or two more bits
draft-cfb-ippm-spinbit-new-measurements-01

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IPPM Working Group                                           M. Cociglio
Internet-Draft                                            Telecom Italia
Intended status: Experimental                                G. Fioccola
Expires: January 2, 2020                             Huawei Technologies
                                                           F. Bulgarella
                                                                R. Sisto
                                                   Politecnico di Torino
                                                            July 1, 2019

      New Spin bit enabled measurements with one or two more bits
               draft-cfb-ippm-spinbit-new-measurements-01

Abstract

   This document introduces additional measurements by using the same
   spin bit signal as defined in [I-D.trammell-ippm-spin].  The spin bit
   signal alone is not enough to evaluate correctly in every network
   condition the RTT of a flow.  In order to solve this problem, it is
   theorized the possibility of introducing an additional validation
   signal called delay bit, similar to what is done done by the Valid
   Edge Counter (VEC), but using just one bit instead of two.  An
   alternative with two bits is also introduced with a so called loss
   bit.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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Cociglio, et al.         Expires January 2, 2020                [Page 1]
Internet-Draft                                                 July 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Spin bit and Delay bit mechanism  . . . . . . . . . . . . . .   3
     2.1.  Delay Sample generation . . . . . . . . . . . . . . . . .   5
       2.1.1.  The recovery process  . . . . . . . . . . . . . . . .   5
     2.2.  Delay Sample reflection . . . . . . . . . . . . . . . . .   6
   3.  Using the Spin bit and Delay bit for Hybrid RTT Measurement .   7
     3.1.  End-to-end RTT measurement  . . . . . . . . . . . . . . .   7
     3.2.  Half-RTT measurement  . . . . . . . . . . . . . . . . . .   7
     3.3.  Intra-domain RTT measurement  . . . . . . . . . . . . . .   7
   4.  Observer's algorithm and Waiting Interval . . . . . . . . . .   8
   5.  Adding a Loss bit to Delay bit and Spin bit . . . . . . . . .   9
   6.  Round Trip Packet Loss measurement  . . . . . . . . . . . . .   9
     6.1.  RTT dependent Packet Loss using one bit . . . . . . . . .  10
     6.2.  RTT independent Packet Loss using two bits  . . . . . . .  10
   7.  Protocols . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.2.  TCP . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     11.2.  Informative References . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   [I-D.trammell-ippm-spin] defines an explicit per-flow transport-layer
   signal for hybrid measurement of end-to-end RTT.  This signal
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