Client-Server Explicit Performance Measurements
draft-cfb-ippm-spinbit-measurements-01

Document Type Active Internet-Draft (individual)
Last updated 2020-03-23
Replaces draft-cfb-tsvwg-spinbit-new-measurements
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IPPM                                                         M. Cociglio
Internet-Draft                                            Telecom Italia
Intended status: Experimental                                G. Fioccola
Expires: September 24, 2020                          Huawei Technologies
                                                                 M. Nilo
                                                           F. Bulgarella
                                                          Telecom Italia
                                                                R. Sisto
                                                   Politecnico di Torino
                                                          March 23, 2020

            Client-Server Explicit Performance Measurements
                 draft-cfb-ippm-spinbit-measurements-01

Abstract

   This document introduces an additional single bit signal to enhance
   the spin bit [I-D.trammell-ippm-spin] performance in presence of
   network impairments and application limited flow.  In addition, it
   defines two new explicit per-flow transport-layer signals for hybrid
   measurement of connection loss rate.  The former is a spin-bit
   dependent signal and uses a single bit.  The latter is a standalone
   solution based on a two bits loss signal and on alternate marking RFC
   8321 [RFC8321].

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

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 24, 2020.

Cociglio, et al.       Expires September 24, 2020               [Page 1]
Internet-Draft                                                March 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Spin bit and Delay bit mechanism  . . . . . . . . . . . . . .   4
     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  . . . . . . . . . . . . . . . . . .   8
     3.3.  Intra-domain RTT measurement  . . . . . . . . . . . . . .   9
   4.  Observer's algorithm and Waiting Interval . . . . . . . . . .  10
   5.  Adding a Loss signal for Packet loss measurement  . . . . . .  11
     5.1.  Round Trip Packet Loss measurement  . . . . . . . . . . .  13
   6.  Packet Loss using one bit loss signal . . . . . . . . . . . .  14
     6.1.  Observer's logic for one bit loss signal  . . . . . . . .  16
   7.  Two Bits packet loss measurement using alternate marking  . .  16
     7.1.  Setting the square bit (Q) on outgoing packets  . . . . .  16
     7.2.  Setting the reflection square bit (R) on outgoing packets  17
       7.2.1.  Determining the completion of an incoming marking
               period  . . . . . . . . . . . . . . . . . . . . . . .  18
     7.3.  Observer's logic and passive loss measurements  . . . . .  18
       7.3.1.  Upstream one-way loss . . . . . . . . . . . . . . . .  19
       7.3.2.  Three-quarters connection loss  . . . . . . . . . . .  19
       7.3.3.  Full one-way loss in the opposite direction . . . . .  20
       7.3.4.  Half round-trip loss  . . . . . . . . . . . . . . . .  21
       7.3.5.  Downstream one-way loss . . . . . . . . . . . . . . .  21
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