Multipath Extensions for QUIC (MP-QUIC)
draft-deconinck-quic-multipath-06
QUIC Working Group Q. De Coninck
Internet-Draft O. Bonaventure
Intended status: Standards Track UCLouvain
Expires: 6 May 2021 2 November 2020
Multipath Extensions for QUIC (MP-QUIC)
draft-deconinck-quic-multipath-06
Abstract
This document specifies extensions to the QUIC protocol to enable the
simultaneous usage of multiple paths for a single connection. These
extensions are compliant with the single-path QUIC design and
preserve QUIC privacy features.
Discussion about this draft is encouraged either on the QUIC IETF
mailing list quic@ietf.org or on the GitHub repository which contains
the draft: https://github.com/qdeconinck/draft-deconinck-multipath-
quic.
Status of This Memo
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This Internet-Draft will expire on 6 May 2021.
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Please review these documents carefully, as they describe your rights
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De Coninck & Bonaventure Expires 6 May 2021 [Page 1]
Internet-Draft MP-QUIC November 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 4
2.1. Notation Conventions . . . . . . . . . . . . . . . . . . 5
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. Moving from Bidirectional Paths to Uniflows . . . . . . . 5
3.2. Beyond Connection Migration . . . . . . . . . . . . . . . 7
3.3. Establishment of a Multipath QUIC Connection . . . . . . 8
3.4. Architecture of Multipath QUIC . . . . . . . . . . . . . 9
3.5. Uniflow Establishment . . . . . . . . . . . . . . . . . . 11
3.6. Exchanging Data over Multiple Uniflows . . . . . . . . . 12
3.7. Exchanging Addresses . . . . . . . . . . . . . . . . . . 14
3.8. Coping with Address Removals . . . . . . . . . . . . . . 15
3.9. Uniflow Migration . . . . . . . . . . . . . . . . . . . . 15
3.10. Handling Multiple Network Paths . . . . . . . . . . . . . 15
3.11. Congestion Control . . . . . . . . . . . . . . . . . . . 16
4. Mapping Uniflow IDs to Connection IDs . . . . . . . . . . . . 16
5. Using Multiple Uniflows . . . . . . . . . . . . . . . . . . . 16
5.1. Multipath Negotiation . . . . . . . . . . . . . . . . . . 17
5.1.1. Transport Parameter Definition . . . . . . . . . . . 17
5.2. Coping with Additional Remote Addresses . . . . . . . . . 17
5.3. Receiving Uniflow State . . . . . . . . . . . . . . . . . 18
5.4. Sending Uniflow State . . . . . . . . . . . . . . . . . . 19
5.5. Losing Addresses . . . . . . . . . . . . . . . . . . . . 20
6. New Frames . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1. MP_NEW_CONNECTION_ID Frames . . . . . . . . . . . . . . . 22
6.2. MP_RETIRE_CONNECTION_ID Frame . . . . . . . . . . . . . . 22
6.3. MP_ACK Frame . . . . . . . . . . . . . . . . . . . . . . 23
6.4. ADD_ADDRESS Frame . . . . . . . . . . . . . . . . . . . . 24
6.5. REMOVE_ADDRESS Frame . . . . . . . . . . . . . . . . . . 25
6.6. UNIFLOWS Frame . . . . . . . . . . . . . . . . . . . . . 26
7. Extension of the Meaning of Existing QUIC Frames . . . . . . 27
8. Security Considerations . . . . . . . . . . . . . . . . . . . 27
8.1. Nonce Computation . . . . . . . . . . . . . . . . . . . . 28
8.2. Validation of Exchanged Addresses . . . . . . . . . . . . 28
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 28
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