ISO 14229-2:2021
Road vehicles — Unified diagnostic services (UDS) — Part 2: Session layer services
This document specifies common session layer services and requirements to provide independence between unified diagnostic services (ISO 14229-1) and all transport protocols and network layer services (e.g. ISO 13400-2 DoIP, ISO 15765-2 DoCAN, ISO 10681-2 communication on FlexRay, ISO 14230-2 DoK-Line, and ISO 20794-3 CXPI).
This document specifies a common service primitive interface between OSI layer 5 (session) and layer 4 (transport) via so-called service request/indication/confirmation primitives.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Abbreviated terms
5 Conventions
6 Session layer services
6.1 Service interface
6.2 Service interface parameters
6.3 Service interface primitives
7 Service interface (SI) definition from application layer to session layer
7.1 SI — S_Data.req, S_Data.ind, and S_Data.conf service interface
7.2 SI — S_Data.req, S_Data.ind, and S_Data.conf service interface parameter mapping
7.3 SI — S_PDU mapping onto T_PDU and vice versa for message transmission
7.4 SI — S_Data.req
7.5 SI — S_Data.ind
7.6 SI — S_Data.conf
8 Service primitive parameters (SPP)
8.1 SPP – General
8.2 SPP – Data type definitions
8.3 SPP – S_Mtype, session layer message type
8.4 SPP – S_TAtype, session layer target address type
8.5 SPP – S_TA, session layer target address
8.6 SPP – S_SA, session layer source address
8.7 SPP – S_AE, session layer address extension
8.8 SPP – S_Length, session layer length of S_Data
8.9 SPP – S_Data, session layer data of PDU
8.10 SPP – S_Result, session layer result
9 Timing parameter definition
9.1 General application timing considerations
9.1.1 Server
9.1.2 Client
9.2 Application timing parameter definitions – defaultSession
9.3 Example for tP4_Server without enhanced response timing
9.4 Example for tP4_Server with enhanced response timing
9.5 Session timing parameter definitions for the non-default session
9.6 Client and server timer resource requirements
9.7 Error handling
10 Timing handling during communication
10.1 Physical communication
10.1.1 Physical communication during defaultSession – without SOM.ind
10.1.2 Physical communication during defaultSession – with SOM.ind
10.1.3 Physical communication during defaultSession with enhanced response timing
10.1.4 Physical communication during a non-default session
10.2 Functional communication
10.2.1 Functional communication during defaultSession – without SOM.ind
10.2.2 Functional communication during defaultSession – with SOM.ind
10.2.3 Functional communication during defaultSession with enhanced response timing – with SOM.ind
10.2.4 Functional communication during non-default session – with SOM.ind
10.3 Minimum time between client request messages
Annex A (normative) T_PDU interface
Annex B (informative) Vehicle diagnostic OSI layer architecture examples
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Abbreviated terms
5 Conventions
6 Session layer services
6.1 Service interface
6.2 Service interface parameters
6.3 Service interface primitives
7 Service interface (SI) definition from application layer to session layer
7.1 SI — S_Data.req, S_Data.ind, and S_Data.conf service interface
7.2 SI — S_Data.req, S_Data.ind, and S_Data.conf service interface parameter mapping
7.3 SI — S_PDU mapping onto T_PDU and vice versa for message transmission
7.4 SI — S_Data.req
7.5 SI — S_Data.ind
7.6 SI — S_Data.conf
8 Service primitive parameters (SPP)
8.1 SPP – General
8.2 SPP – Data type definitions
8.3 SPP – S_Mtype, session layer message type
8.4 SPP – S_TAtype, session layer target address type
8.5 SPP – S_TA, session layer target address
8.6 SPP – S_SA, session layer source address
8.7 SPP – S_AE, session layer address extension
8.8 SPP – S_Length, session layer length of S_Data
8.9 SPP – S_Data, session layer data of PDU
8.10 SPP – S_Result, session layer result
9 Timing parameter definition
9.1 General application timing considerations
9.1.1 Server
9.1.2 Client
9.2 Application timing parameter definitions – defaultSession
9.3 Example for tP4_Server without enhanced response timing
9.4 Example for tP4_Server with enhanced response timing
9.5 Session timing parameter definitions for the non-default session
9.6 Client and server timer resource requirements
9.7 Error handling
10 Timing handling during communication
10.1 Physical communication
10.1.1 Physical communication during defaultSession – without SOM.ind
10.1.2 Physical communication during defaultSession – with SOM.ind
10.1.3 Physical communication during defaultSession with enhanced response timing
10.1.4 Physical communication during a non-default session
10.2 Functional communication
10.2.1 Functional communication during defaultSession – without SOM.ind
10.2.2 Functional communication during defaultSession – with SOM.ind
10.2.3 Functional communication during defaultSession with enhanced response timing – with SOM.ind
10.2.4 Functional communication during non-default session – with SOM.ind
10.3 Minimum time between client request messages
Annex A (normative) T_PDU interface
Annex B (informative) Vehicle diagnostic OSI layer architecture examples
Bibliography