New Spin bit enabled measurements with one or two more bits
draft-cfb-tsvwg-spinbit-new-measurements-00

Document Type Active Internet-Draft (individual)
Last updated 2019-11-04
Replaces draft-cfb-ippm-spinbit-new-measurements
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TSVWG                                                        M. Cociglio
Internet-Draft                                            Telecom Italia
Intended status: Experimental                                G. Fioccola
Expires: May 7, 2020                                 Huawei Technologies
                                                           F. Bulgarella
                                                                R. Sisto
                                                   Politecnico di Torino
                                                        November 4, 2019

      New Spin bit enabled measurements with one or two more bits
              draft-cfb-tsvwg-spinbit-new-measurements-00

Abstract

   This document introduces additional measurements by using the same
   spin bit signal as defined in [I-D.trammell-tsvwg-spin] and
   [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 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.  More in general a loss signal is defined
   to measure packet loss and two alternatives are presented with one
   bit and two bits.

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].

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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Cociglio, et al.           Expires May 7, 2020                  [Page 1]
Internet-Draft                                             November 2019

   This Internet-Draft will expire on May 7, 2020.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Spin bit and Delay bit mechanism  . . . . . . . . . . . . . .   3
     2.1.  Delay Sample generation . . . . . . . . . . . . . . . . .   5
       2.1.1.  The recovery process  . . . . . . . . . . . . . . . .   6
     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  . . . . . . . . . . . . . .   8
   4.  Observer's algorithm and Waiting Interval . . . . . . . . . .   8
   5.  Adding a Loss signal for Packet loss measurement  . . . . . .   9
     5.1.  Round Trip Packet Loss measurement  . . . . . . . . . . .  10
   6.  RTT dependent Packet Loss using one bit loss signal . . . . .  11
     6.1.  Observer's logic for one bit loss signal  . . . . . . . .  12
   7.  RTT independent Packet Loss using two bits loss signal  . . .  12
     7.1.  Observer's logic for two bits loss signal . . . . . . . .  14
   8.  Protocols . . . . . . . . . . . . . . . . . . . . . . . . . .  14
     8.1.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . . . .  14
     8.2.  TCP . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  15
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