Multipath Extensions for QUIC (MP-QUIC)
draft-deconinck-quic-multipath-04
QUIC Working Group Q. De Coninck
Internet-Draft O. Bonaventure
Intended status: Standards Track UCLouvain
Expires: 6 September 2020 5 March 2020
Multipath Extensions for QUIC (MP-QUIC)
draft-deconinck-quic-multipath-04
Abstract
This document specifies extensions to the QUIC protocol to enable the
simultaneous usage of multiple paths for a single connection. The
proposed extensions remain compliant with the current single-path
QUIC design and preserve the QUIC privacy features.
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De Coninck & BonaventureExpires 6 September 2020 [Page 1]
Internet-Draft MP-QUIC March 2020
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 4
2.1. Notation Conventions . . . . . . . . . . . . . . . . . . 4
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 . . . . . . . . . . . . . 8
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. Congestion Control . . . . . . . . . . . . . . . . . . . 15
4. Mapping Uniflow IDs to Connection IDs . . . . . . . . . . . . 15
5. Using Multiple Uniflows . . . . . . . . . . . . . . . . . . . 16
5.1. Multipath Negotiation . . . . . . . . . . . . . . . . . . 16
5.1.1. Transport Parameter Definition . . . . . . . . . . . 16
5.2. Coping with Additional Remote Addresses . . . . . . . . . 17
5.3. Receiving Uniflow State . . . . . . . . . . . . . . . . . 17
5.4. Sending Uniflow State . . . . . . . . . . . . . . . . . . 18
5.5. Losing Addresses . . . . . . . . . . . . . . . . . . . . 20
6. New Frames . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1. MP_NEW_CONNECTION_ID Frame . . . . . . . . . . . . . . . 20
6.2. MP_RETIRE_CONNECTION_ID Frame . . . . . . . . . . . . . . 21
6.3. MP_ACK Frame . . . . . . . . . . . . . . . . . . . . . . 22
6.4. ADD_ADDRESS Frame . . . . . . . . . . . . . . . . . . . . 23
6.5. REMOVE_ADDRESS Frame . . . . . . . . . . . . . . . . . . 24
6.6. UNIFLOWS Frame . . . . . . . . . . . . . . . . . . . . . 25
7. Extension of the Meaning of Existing QUIC Frames . . . . . . 26
8. Security Considerations . . . . . . . . . . . . . . . . . . . 27
8.1. Nonce Computation . . . . . . . . . . . . . . . . . . . . 27
8.2. Validation of Exchanged Addresses . . . . . . . . . . . . 27
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 27
9.1. QUIC Transport Parameter Registry . . . . . . . . . . . . 27
10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 28
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.1. Normative References . . . . . . . . . . . . . . . . . . 28
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