Multipath Extension for QUIC
draft-deconinck-quic-multipath-01
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QUIC Working Group Q. De Coninck
Internet-Draft O. Bonaventure
Intended status: Standards Track UCLouvain
Expires: March 8, 2019 September 4, 2018
Multipath Extension for QUIC
draft-deconinck-quic-multipath-01
Abstract
This document proposes extensions to the QUIC protocol to enable the
usage of multiple paths over a single connection. Those changes
remain compliant with the current single-path QUIC design. They
allow devices to benefit from multiple network paths while preserving
the privacy features of QUIC.
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 March 8, 2019.
Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
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De Coninck & Bonaventure Expires March 8, 2019 [Page 1]
Internet-Draft MP-QUIC September 2018
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 3
2.1. Notational Conventions . . . . . . . . . . . . . . . . . 4
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. What is a Path? . . . . . . . . . . . . . . . . . . . . . 4
3.2. Beyond Connection Migration . . . . . . . . . . . . . . . 4
3.3. Establishment of a Multipath QUIC Connection . . . . . . 6
3.4. Architecture of Multipath QUIC . . . . . . . . . . . . . 6
3.5. Path Establishment . . . . . . . . . . . . . . . . . . . 7
3.6. Exchanging Data over Multiple Paths . . . . . . . . . . . 8
3.7. Exchanging Addresses . . . . . . . . . . . . . . . . . . 9
3.8. Coping with Address Removals . . . . . . . . . . . . . . 9
3.9. Path Migration . . . . . . . . . . . . . . . . . . . . . 10
3.10. Congestion Control . . . . . . . . . . . . . . . . . . . 11
4. Mapping Path ID to Connection IDs . . . . . . . . . . . . . . 11
5. Using Multiple Paths . . . . . . . . . . . . . . . . . . . . 11
5.1. Multipath Negotiation . . . . . . . . . . . . . . . . . . 12
5.1.1. Transport Parameter Definition . . . . . . . . . . . 12
5.2. Coping with Additional Remote Addresses . . . . . . . . . 12
5.3. Path State . . . . . . . . . . . . . . . . . . . . . . . 13
5.4. Dynamic Management of Paths . . . . . . . . . . . . . . . 15
5.5. Loosing Addresses . . . . . . . . . . . . . . . . . . . . 16
5.6. Scheduling Strategies . . . . . . . . . . . . . . . . . . 16
6. Modifications to QUIC frames . . . . . . . . . . . . . . . . 17
6.1. NEW_CONNECTION_ID Frame . . . . . . . . . . . . . . . . . 17
6.2. ACK Frame . . . . . . . . . . . . . . . . . . . . . . . . 18
7. New Frames . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1. MAX_PATHS Frame . . . . . . . . . . . . . . . . . . . . . 19
7.2. PATH_UPDATE Frame . . . . . . . . . . . . . . . . . . . . 19
7.3. ADD_ADDRESS Frame . . . . . . . . . . . . . . . . . . . . 20
7.4. REMOVE_ADDRESS Frame . . . . . . . . . . . . . . . . . . 21
7.5. PATHS Frame . . . . . . . . . . . . . . . . . . . . . . . 22
8. Security Considerations . . . . . . . . . . . . . . . . . . . 23
8.1. Nonce Computation . . . . . . . . . . . . . . . . . . . . 23
8.2. Validation of Exchanged Addresses . . . . . . . . . . . . 24
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 24
9.1. QUIC Transport Parameter Registry . . . . . . . . . . . . 24
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