STRUCTURE AND ENCODING OF PROTOCOL DATA UNITS

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CONTENTS
1. SCOPE
2. DOCUMENT STATUS
2.1 COPYRIGHT NOTICE
2.2 ERRATA
2.3 COMMENTS
3. REFERENCES
3.1 NORMATIVE REFERENCES
3.2 INFORMATIVE REFERENCES
4. DEFINITIONS AND ABBREVIATIONS
4.1 DEFINITIONS
4.2 ABBREVIATIONS
4.3 REQUIREMENTS
5. PROTOCOL OVERVIEW
5.1 PROTOCOL FEATURES
5.2 TRANSACTION CLASSES
5.2.1 Class 0: Unreliable invoke message with no result message
5.2.2 Class 1: Reliable invoke message with no result message
5.2.3 Class 2: Reliable invoke message with one reliable result message
5.3 RELATION TO OTHER PROTOCOLS
5.4 SECURITY CONSIDERATIONS
5.5 MANAGEMENT ENTITY
5.6 STATIC WTP CONFORMANCE CLAUSE
5.7 OTHER WTP USERS
6. ELEMENTS FOR LAYER-TO-LAYER COMMUNICATION
6.1 NOTATIONS USED
6.1.1 Definition of Service Primitives and Parameters
6.1.2 Primitives Types6.1.3 Service Parameter Tables
6.2 REQUIREMENTS ON THE UNDERLYING LAYER
6.3 SERVICES PROVIDED TO UPPER LAYER
6.3.1 TR-Invoke 6.3.2 TR-Result
6.3.3 TR-Abort
7. CLASSES OF OPERATION
7.1 CLASS 0 TRANSACTION
7.1.1 Motivation
7.1.2 Protocol Data Units
7.1.3 Procedure
7.2 CLASS 1 TRANSACTION
7.2.1 Motivation
7.2.2 Service Primitive Sequences
7.2.3 Protocol Data Units
7.2.4 Procedure
7.3 CLASS 2 TRANSACTION
7.3.1 Motivation
7.3.2 Service Primitive Sequences
7.3.3 Protocol Data Units
7.3.4 Procedure
8. PROTOCOL FEATURES
8.1 MESSAGE TRANSFER
8.1.1 Description
8.1.2 Service Primitives
8.1.3 Transport Protocol Data Units
8.1.4 Timer Intervals and Counters
8.1.5 Procedure
8.2 RE-TRANSMISSION UNTIL ACKNOWLEDGEMENT
8.2.1 Motivation
8.2.2 Transport Protocol Data Units
8.2.3 Timer Intervals and Counters
8.2.4 Procedure
8.3 USER ACKNOWLEDGEMENT
8.3.1 Motivation
8.3.2 Protocol Data Units
8.3.3 Procedure
8.4 INFORMATION IN LAST ACKNOWLEDGEMENT
8.4.1 Motivation
8.4.2 Service Primitives
8.4.3 Protocol Data Units
8.4.4 Procedure
8.5 CONCATENATION AND SEPARATION
8.5.1 Motivation
8.5.2 Procedure
8.6 ASYNCHRONOUS TRANSACTIONS
8.6.1 Motivation
8.7 TRANSACTION ABORT
8.7.1 Motivation
8.7.2 Transport Protocol Data Units
8.7.3 Service primitives
8.7.4 Procedure
8.8 TRANSACTION IDENTIFIER
8.8.1 Motivation
8.8.2 Procedure at the Responder
8.8.3 Procedure at the Initiator
8.9 TRANSACTION IDENTIFIER VERIFICATION
8.9.1 Motivation
8.9.2 Protocol Data Units
8.9.3 Procedure
8.10 TRANSPORT INFORMATION ITEMS (TPIS)
8.10.1 Motivation
8.10.2 Procedure
1.1 TRANSMISSION OF PARAMETERS
8.10.3 Motivation
8.10.4 Procedure
8.11 ERROR HANDLING
8.11.1 Motivation
8.11.2 Protocol Data Units
8.11.3 Procedure
8.12 VERSION HANDLING
8.12.1 Motivation
8.12.2 Protocol Data Units
8.12.3 Procedure
8.13 SEGMENTATION AND RE-ASSEMBLY (OPTIONAL)
8.13.1 Motivation
8.13.2 Procedure for Segmentation
8.13.3 Procedure for Packet Groups
8.13.4 Procedure for Selective Re-transmission
9. STRUCTURE AND ENCODING OF PROTOCOL DATA UNITS
9.1 GENERAL
9.2 COMMON HEADER FIELDS
9.2.1 Continue Flag, CON
9.2.2 Group Trailer (GTR) and Transmission Trailer (TTR) flag
9.2.3 Packet Sequence Number
9.2.4 PDU Type
9.2.5 Reserved, RES
9.2.6 Re-transmission Indicator, RID
9.2.7 Transaction Identifier, TID
9.3 FIXED HEADER STRUCTURE
9.3.1 Invoke PDU
9.3.2 Result PDU
9.3.3 Acknowledgement PDU
9.3.4 Abort PDU
9.3.5 Segmented Invoke PDU (Optional)
9.3.6 Segmented Result PDU (Optional)
9.3.7 Negative Acknowledgement PDU (Optional)
9.4 TRANSPORT INFORMATION ITEMS
9.4.1 General
9.4.2 Error TPI
9.4.3 Info TPI
9.4.4 Option TPI
9.4.5 Packet Sequence Number TPI (Optional)
9.5 STRUCTURE OF CONCATENATED PDUS
10. STATE TABLES
10.1 GENERAL 10.2 EVENT PROCESSING
10.3 ACTIONS
10.3.1 Timers
10.3.2 Counters
10.3.3 Messages
10.4 TIMERS, COUNTERS AND VARIABLES
10.4.1 Timers
10.4.2 Counters
10.4.3 Variables
10.5 WTP INITIATOR
10.6 WTP RESPONDER
11. EXAMPLES OF PROTOCOL OPERATION
11.1 INTRODUCTION
11.2 CLASS 0 TRANSACTION
11.2.1 Basic Transaction
11.3 CLASS 1 TRANSACTION
11.3.1 Basic Transaction
11.4 CLASS 2 TRANSACTION
11.4.1 Basic Transactio
n11.4.2 Transaction with “hold on” Acknowledgement
11.5 TRANSACTION IDENTIFIER VERIFICATION
11.5.1 Verification Succeeds
11.5.2 Verification Fails
11.5.3 Transaction with Out-Of-Order Invoke
11.6 SEGMENTATION AND RE-ASSEMBLY
11.6.1 Selective Re-transmission
APPENDIX A. DEFAULT TIMER AND COUNTER VALUES
APPENDIX B. IMPLEMENTATION NOTE
APPENDIX C. HISTORY AND CONTACT INFORMATION