2001, Wireless Application Protocol Forum, Ltd. All Rights Reserved. Terms and conditions of use are available from
the WAP Forum Web site (http://www.wapforum.org/what/copyright.htm ).
Wireless Datagram Protocol
Version 14-Jun-2001
Wireless Application Protocol
WAP-259-WDP-20010614-a
A list of errata and updates to this document is available from the WAP Forum™ Web site, http://www.wapforum.org/,
in the form of SIN documents, which are subject to revision or removal without notice.
WAP-259-WDP-20010614-a, Version 14-Jun-2001 Page 2 (75)
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© 2001, Wireless Application Forum, Ltd. All rights reserved.
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Document History
WAP-200-WDP-20000219-a Approved
WAP-200_001-WDP-20001212-a SIN
WAP-200_002-WDP-20001213-a SIN
WAP-200_003-WDP-20010328-a SIN
WAP-259-WDP-20010426-p Proposed
WAP-259_001-WDP-20010518-p SCD
WAP-259_002-WDP-20010614-p SCD
WAP-259-WDP-20010614-a Current
WAP-259-WDP-20010614-a, Version 14-Jun-2001 Page 3 (75)
2001, Wireless Application Protocol Forum, Ltd.
All rights reserved
Contents
1. SCOPE................................................................................................................................................................................................5
2. REFERENCES .................................................................................................................................................................................6
2.1. NORMATIVE REFERENCES .......................................................................................................................................................6
2.2. INFORMATIVE REFERENCES....................................................................................................................................................8
3. TERMINOLOGY AND CONVENTIONS ...............................................................................................................................9
3.1. CONVENTIONS ............................................................................................................................................................................9
3.2. DEFINITIONS ...............................................................................................................................................................................9
3.3. GENERAL CONCEPTS ..............................................................................................................................................................11
3.4. ABBREVIATIONS .......................................................................................................................................................................11
4. WDP ARCHITECTURAL OVERVIEW................................................................................................................................14
4.1. REFERENCE MODEL ................................................................................................................................................................14
4.2. GENERAL DESCRIPTION OF THE WDP PROTOCOL..........................................................................................................15
4.2.1. WDP Management Entity...............................................................................................................................................16
4.2.2. Processing Errors of WDP Datagrams ..........................................................................................................................17
4.2.3. Security Considerations...................................................................................................................................................17
4.3. WDP CONFORMANC E.............................................................................................................................................................17
4.3.1. WDP Adaptation Layer Segmentation & Re-assembly .............................................................................................17
4.4. WDP BEARER DEPENDENT PROFILES ................................................................................................................................18
4.4.1. WDP over GSM ................................................................................................................................................................18
4.4.1.1. GSM SMS Profile.......................................................................................................................................................... 18
4.4.1.2. GSM USSD Profile .......................................................................................................................................................19
4.4.1.3. GSM Circuit-Switched Data......................................................................................................................................... 19
4.4.1.4. GSM GPRS Profile .......................................................................................................................................................20
4.4.1.5. GSM Cell Broadcast..................................................................................................................................................... 20
4.4.2. WDP over ANSI-136.......................................................................................................................................................21
4.4.2.2. ANSI-136 Circuit-Switched Data Profile ..................................................................................................................... 22
4.4.2.3. ANSI-136 Packet Data Profile...................................................................................................................................... 22
4.4.3. WDP over CDPD..............................................................................................................................................................23
4.4.4. WDP over CDMA............................................................................................................................................................23
4.4.4.1. CDMA Circuit-Switched Data Profile.......................................................................................................................... 24
4.4.4.2. CDMA Packet Data Profile.......................................................................................................................................... 25
4.4.4.3. CDMA SMS................................................................................................................................................................... 25
4.4.5. WDP over PDC (Japan)...................................................................................................................................................26
4.4.5.1. PDC Circuit-Switched Data ......................................................................................................................................... 26
4.4.5.2. PDC Packet Data Profile ............................................................................................................................................. 27
4.4.6. WDP Profile Over iDEN.................................................................................................................................................27
4.4.6.1. iDEN Circuit-Switched Data........................................................................................................................................ 28
4.4.6.2. iDEN Packet Data ........................................................................................................................................................ 28
4.4.7. WDP over FLEX
TM
and ReFLEX
TM
.............................................................................................................................29
4.4.8. WDP over PHS.................................................................................................................................................................30
4.4.8.1. PHS Circuit-Switched data........................................................................................................................................... 30
4.4.9. WDP over DataTAC........................................................................................................................................................31
4.4.10. WDP Profile Over TETRA...........................................................................................................................................31
4.4.10.1. TETRA Short Data Service......................................................................................................................................... 31
4.4.10.2. TETRA Packet Data.................................................................................................................................................... 32
4.4.11. WDP over DECT............................................................................................................................................................32
4.4.11.1. DECT short message service...................................................................................................................................... 32
4.4.11.2. DECT connection oriented services........................................................................................................................... 33
4.4.11.3. DECT packet switched services.................................................................................................................................. 33
4.4.12. WDP over Mobitex........................................................................................................................................................33
WAP-259-WDP-20010614-a, Version 14-Jun-2001 Page 4 (75)
2001, Wireless Application Protocol Forum, Ltd.
All rights reserved
5. ELEMENTS FOR LAYER-TO-LAYER COMMUNICATION......................................................................................35
5.1. SERVICE PRIMITIVE NOTATION...........................................................................................................................................35
5.2. SERVICE PRIMITIVE TYPES ...................................................................................................................................................35
5.3. WDP SERVICE PRIMITIVES ...................................................................................................................................................36
5.3.1. General...............................................................................................................................................................................36
5.3.2. T-DUnitdata.......................................................................................................................................................................36
5.3.3. T-DError.............................................................................................................................................................................36
6. WDP PROTOCOL DESCRIPTION........................................................................................................................................38
6.1. INTRODUCTION.........................................................................................................................................................................38
6.2. MAPPING OF WDP FOR IP.....................................................................................................................................................38
6.3. MAPPING OF WDP FOR GSM SMS, ANSI-136 GHOST AND USSD..........................................................................38
6.3.1. Binary Header Format......................................................................................................................................................38
6.3.2. Segmentation and Reassembly .......................................................................................................................................38
6.3.2.1. Fragmentation Information Element (short) ................................................................................................................ 39
6.3.2.2. Fragmentation Information Element (long) ................................................................................................................. 39
6.3.2.3. Port address Information Element................................................................................................................................ 39
6.3.3. Mapping of WDP to GSM SMS Phase 1 Text -based Headers.................................................................................39
6.3.4. Mapping of WDP to GSM USSD..................................................................................................................................41
6.4. MAPPING OF WDP FOR ANSI-136 GUTS/R-DATA ........................................................................................................41
6.5. MAPPING OF WDP TO CDMA SMS ...................................................................................................................................41
6.5.1. Datagram Structure...........................................................................................................................................................42
6.5.2. SMS User Data..................................................................................................................................................................42
6.5.3. Use of MESSAGE_ID Field...........................................................................................................................................42
6.5.4. Segmentation and Reassembly .......................................................................................................................................43
6.5.5. Segmentation Example ....................................................................................................................................................43
6.6. MAPPING OF WDP TO FLEX
TM
AND REFLEX
TM
...........................................................................................................44
6.7. MAPPING OF WDP TO DATA TAC .......................................................................................................................................45
6.8. MAPPING OF WDP TO GSM CELL BROADCAST..............................................................................................................55
6.8.1. Binary Header Format......................................................................................................................................................55
6.8.2. Source and Destination Port Addressing......................................................................................................................56
6.8.3. Segmentation and Reassembly .......................................................................................................................................56
6.9. MAPPING OF WDP TO TETRA SDS...................................................................................................................................56
6.10. MAPPING OF WDP FOR MOBITEX .....................................................................................................................................57
6.10.1. Short Datagram Format .................................................................................................................................................57
6.10.2. Long Datagram Format .................................................................................................................................................58
6.10.3. Long Datagram Format with Space Saving Function (SSF)...................................................................................58
6.10.4. Bit Set for Datagram......................................................................................................................................................59
6.10.5. Encapsulation of WDP Mapping for Mobitex into MPAKs...................................................................................59
APPENDIX A. STATIC CONFORMANCE REQUIREMENTS (NORMATIVE).......................................................60
APPENDIX B. PORT NUMBER DEFINITIONS (NORMATIVE)...................................................................................68
APPENDIX C. BEARER TYPE ASSIGNMENTS (NORMATIVE) .................................................................................69
APPENDIX D. MAPPING WDP INTO UDH FORMAT (INFORMATIVE).................................................................71
APPENDIX E. IMPLEMENTATION NOTES (INFORMATIVE) ...................................................................................74
APPENDIX F. CHANGE HISTORY (INFORMATIVE).....................................................................................................75
WAP-259-WDP-20010614-a, Version 14-Jun-2001 Page 5 (75)
2001, Wireless Application Protocol Forum, Ltd.
All rights reserved
1. Scope
The Transport layer protocol in the WAP architecture consists of the Wireless Transaction Protocol (WTP) and the
Wireless Datagram Protocol (WDP). The WDP layer operates above the data capable bearer services supported by the
various network types. As a general datagram service, WDP offers a consistent service to the upper layer protocol
(Security, Transaction and Session) of WAP and communicate transparently over one of the available bearer services.
The protocols in the WAP family are designed for use over narrowband bearers in wireless telecommunications
networks.
Since the WDP protocols provide a common interface to the upper layer protocols (Security, Transaction and Session
layers) , they are able to function independently of the underlying wireless network. This is accomplished by adapting
the transport layer to specific features of the underlying bearer.
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