TR 29.893
Study on IETF QUIC Transport for 5GC Service Based Interfaces
V18.0.0 (Wzip)
2023/09 42 p.
- Rapporteur:
- Ms. Qi, Caixia
HuaWei Technologies Co., Ltd
full Table of Contents for TR 29.893 Word version: 18.0.0
1 Scope
2 References
3 Definitions, symbols and abbreviations
4 Architectural Baseline
5 Transport Protocol Features Required For 3GPP 5GC SBI
6 HTTP/3
7 Key Requirements for Supporting QUIC
8 Solutions for Key Requirements
9 Impacts to Service Based Architecture
10 Current Implementation and Maturity Status
11 Evaluation and Conclusion
A HTTP/2 vs. HTTP/3 testing findings and considerations
$ Change history
1 Scope p. 6
The present document analyses the IETF QUIC protocol and its potential use as a transport protocol for the 5GC Service Based Interfaces.
This technical report provides an analysis of the following aspects:
- Features of transport protocol required for 5GC SBI;
- Features of QUIC applicable to 5GC SBI;
- Comparison of the applicable features of QUIC against TCP for the 5GC SBI;
- Key requirements for 5GC SBI in order to support QUIC as a transport protocol;
- Solutions for supporting the key requirements;
- Impacts to 5GC Service Based Interfaces due to introduction of QUIC.
2 References p. 6
3 Definitions, symbols and abbreviations p. 8
3.1 Definitions p. 8
3.2 Abbreviations p. 8
4 Architectural Baseline p. 8
5 Transport Protocol Features Required For 3GPP 5GC SBI p. 9
5.1 Introduction p. 9
5.2 Requirements from Transport Protocol for 3GPP 5GC SBI p. 9
5.3 Features of QUIC p. 10
5.3.1 General p. 10
5.3.2 Framing and Multiplexing p. 10
5.3.3 Improved Recovery and Acknowledgement p. 11
5.3.4 Encrypted and Integrity Protected Transport details p. 11
5.3.5 Connection Setup Improvements p. 11
5.3.6 0-RTT Data p. 12
5.3.7 Connection ID p. 12
5.3.8 Connection Migration p. 12
5.3.9 Stream Prioritization p. 13
5.3.10 Flow Control p. 13
5.3.11 Protocol Versioning p. 13
5.3.12 QUIC Extensibility p. 13
5.3.13 Connection Configuration p. 14
5.3.14 User-Land Implementations p. 14
5.3.15 Pluggable Sender Side Congestion Control p. 14
5.3.16 Checking that the QUIC connection is alive p. 14
5.3.17 62 bits stream identifiers p. 14
5.3.18 Running atop of UDP p. 15
5.4 Features of QUIC Applicable to 3GPP SBI p. 15
5.4.1 General p. 15
5.4.2 Framing and Multiplexing p. 15
5.4.3 Encrypted and Integrity Protected Transport details p. 15
5.4.4 Connection setup improvements p. 15
5.4.5 Connection ID and Connection Migration p. 16
5.4.6 Improved Recovery and Acknowledgement p. 16
5.5 Features of QUIC Not Applicable to 3GPP SBI p. 16
5.5.1 General p. 16
5.5.2 0-RTT DATA p. 16
5.6 Comparison of Applicable Features with Rel-15 Transport p. 17
6 HTTP/3 p. 20
6.1 Introduction p. 20
6.2 HTTP/3 Proxies p. 21
6.2.1 General p. 21
6.2.2 When NF Service Consumer Side Uses QUIC p. 22
6.2.2.1 Case A: Invoking http API Supporting Only TCP Transport p. 22
6.2.2.2 Case B: Invoking http API Supporting QUIC Transport p. 24
6.2.2.3 Case C: Invoking https API Supporting Only TCP Transport p. 25
6.2.2.4 Case D: Invoking https API Supporting QUIC Transport p. 26
6.2.3 When NF Service Consumer Side Uses TCP p. 27
6.3 Considerations for HTTP/3 p. 28
6.3.1 General p. 28
6.3.2 Connection setup and management p. 28
6.3.3 Streams, framing and multiplexing p. 28
6.3.4 Prioritization p. 29
6.3.5 Server Push p. 29
6.3.6 Compression (HPACK vs QPACK) p. 29
7 Key Requirements for Supporting QUIC p. 29
7.1 Introduction p. 29
7.2 Discovery of QUIC support p. 29
7.3 Discovery of NRF's Support for QUIC p. 30
7.4 Migration to QUIC p. 30
7.5 Support of Indirect Communication p. 30
8 Solutions for Key Requirements p. 30
8.1 Introduction p. 30
8.2 Solutions for Discovery of QUIC support p. 31
8.3 Solutions for Discovery of NRF's Support for QUIC p. 32
8.3.1 Providing NRF Transport Capability from NSSF p. 32
8.3.2 Providing Remote PLMN NRF's Transport Capability during NF Discovery p. 32
8.3.3 Discovery Based On Local Configuration p. 32
8.4 Solutions for Migration to QUIC p. 33
9 Impacts to Service Based Architecture p. 34
9.1 Introduction p. 34
9.2 HTTP Proxy Traversal p. 34
9.3 QUIC's Security Mechanisms p. 34
9.4 TCP Decommission in Migration Impacts Architecture p. 34
9.5 Transport Proxy Traversal p. 35
9.6 Impacts on Troubleshooting p. 35
10 Current Implementation and Maturity Status p. 36
10.1 Introduction p. 36
10.2 Implementation maturity p. 36
10.3 Hardware offload support p. 37
10.4 UDP Performance in Operating System p. 37
11 Evaluation and Conclusion p. 38
11.1 Evaluation p. 38
11.1.1 Requirements for Service Based Interfaces p. 38
11.1.2 Expected improvements p. 38
11.1.3 Issues p. 38
11.1.4 Other considerations p. 39
11.2 Conclusion p. 39
A HTTP/2 vs. HTTP/3 testing findings and considerations p. 39
$ Change history p. 41
