1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2765 (1 2/1999) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for the network signalling Signalling System No. 7 B-ISDN User Part (B-ISUP) - Application Transport Mechanis
2、m (APM) ITU-T Recommendation Q.2765 (Formerly CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF S
3、IGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORIUNG OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORIUNG WITH SATELLITE MOBILE
4、 SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 General aspects Signalling ATM adaptation layer (SAAL) Signalling network protocols Common aspects of B-ISDN
5、application protocols for access signalling and network signalling and interworking B-ISDN application protocols for access signalling Q.lLQ.3 Q.4-Q.59 Q.60.99 Q. 100.119 Q. 120.249 Q.250.309 Q.310.399 Q.400.499 Q.500.599 Q.600.699 Q.700.849 Q.850.999 Q. 1000. 1099 Q. 1 100.1199 Q. 1200.1699 Q.1700.
6、1799 Q.2000.2999 Q.2000.2099 Q.2100.2199 Q.2200.2299 Q.2600.2699 Q.2900.2999 For further details, please re$er to the list of ITD-T Recommendations. ITU-T Recommendation 4.2765 Signalling System No. 7 B-ISDN User Part (B-ISUP) - Application Transport Mechanism (APM) Summary This ITU-T Recommendation
7、, Application Transport Mechanism (APM), is an addition to the B-ISDN User Part (B-ISUP) that provides a transport mechanism for its applications requiring a bearer and, in conjunction, support the applications signalling information flow. This transport mechanism provides the same capabilities as t
8、hat which the Transaction Capabilities Application Part (TCAP) provides its user. The basic function of the Application Transport Mechanism is to create signalling associations between the APM-user application logic located at a public initiating node (PIN) and its per APM- user application located
9、at the public address node. Source ITU-T Recommendation 4.2765 was prepared by ITU-T Study Group 11 (1997-2000) and approved under the WTSC Resolution 1 procedure on 3 December 1999. ITU-T 4.2765 (12/1999) 1 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized a
10、gency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwi
11、de basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WT
12、SC Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication adminis
13、tration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicabi
14、lity of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement
15、 this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, ele
16、ctronic or mechanical, including photocopying and microfilm, without permission in writing fi-om the ITU. 11 ITU-T 4.2765 (12/1999) CONTENTS 1 2 3 4 5 5.1 5.2 5.3 5.4 6 6.1 7 7.1 7.2 Scope . References . Additional Abbreviations Exceptions and clarification for Application Transport Mechanism in ITU
17、-T Recommendation 4.765 . Additional description to ITU-T 4.276-series Recommendations . Additional description to ITU-T Recommendation 4.276 1 . Additional description to ITU-T Recommendation 4.2762 . Additional description to ITU-T Recommendation 4.2763 . Additional description to ITU-T Recommenda
18、tion 4.2764 . 5.4.1 SACF . 5.4.2 Additions to APM-ASE . 5.4.3 prep-APM ASE Other services and capabilities . Point-to-multipoint . Intenvorking Intenvorking with N-ISUP Intenvorking with broadband nodes not supporting the APM Annex A . Page 1 1 1 2 5 5 5 5 5 5 7 8 8 8 8 8 8 9 . ITU-T 4.2765 (12/1999
19、) 111 ITU-T Recommendation 4.2765 Signalling System No. 7 B-ISDN User Part (B-ISUP) - Application Transport Mechanism (APM) 1 Scope This ITU-T Recommendation specifies the exceptions to the 4.765 recommendation to support Application Transport Mechanism in the broadband network. The information cont
20、ained in this ITU-T Recommendation should be read in conjunction with 4.765. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicate
21、d were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T R
22、ecommendations is regularly published. ITU-T Recommendation 4.765 (2000), Signalling System No. 7 - Application transport mechan ism. ITU-T Recommendation 4.276 1 (1 999), Functional description of the B-ISDN user part - ISUP) of Signalling System No. 7. ITU-T Recommendation 4.2762 (1999), General J
23、unctions of messages and signals of the B-ISDN user part -ISUP) of Signalling System No. 7. ITU-T Recommendation 4.2763 (1999), Signalling System No. 7 B-ISDN user part -ISUP) -Formats and codes. ITU-T Recommendation 4.2764 (1999), Signalling System No. 7 ISDN user part -ISUP) -Basic call procedures
24、. ITU-T Recommendation 4.2730 (1999), Signalling System No. 7 B-ISDN user part -ISUP) - Supplementary services. ITU-T Recommendation 4.2660 (1999), Interworking between Signalling System No. 7 broadband ISDN user part -ISUP) and narrow- band ISDN user part (IV-ISUP). ITU-T Recommendation 4.2650 (199
25、9), Interworking between Signalling System No. 7 broadband ISDN user part -ISUP) and digital subscriber signalling system No. 2 (aSS2). ITU-T Recommendation 4.2610 (1999), Usage of cause and location in B-ISDN user part and DSS2. Additional Abbreviations prep-APM ASE Preparing APM ASE ITU-T 4.2765 (
26、12/1999) 1 4 Table 4-1 contains three columns as follows: Exceptions and clarification for Application Transport Mechanism in ITU-T Recommendation 4.765 o relevant reference in ITU-T Recommendation 4.765; the title of the referenced clause; o o remarks. All subclasses are the same as in ITU-T Recomm
27、endation 4.765 unless indicated otherwise in Table 4- 1. The remark “not applicable“ in the table means that a procedure described in ITU-T Recommendation 4.765 is not available in the broadband signalling references. Table 4-UQ.2765 - Exceptions and clarification against ITU-T Recommendation 4.765
28、4.765 1 2 3 4 5 6 6.1 6.2 6.2.1 Title Scope References Definitions Abbreviations Recommendation structure Modelling Network model Specification model Introduction 2 ITU-T 4.2765 (12/1999) Remarks Throughout the Recommendation replace the following references: - ITU-T Rec. Q.761 by ITU-T Rec. Q.2761
29、2; - ITU-T Rec. Q.762 by ITU-T Rec. Q.2762 3; - ITU-T Rec. Q.763 by ITU-T Rec. Q.2763 4; - ITU-T Rec. Q.764 by ITU-T Rec. Q.2764 5. Replace “ISUP ASE“ by “prep-APM ASE“. The prep-APM ASE contains the additional coordination functionality for handling all APM related information. Addressing and routi
30、ng methods as described in ITU-T Recommendation Q.2764 may be possible. Table 4-UQ.2765 - Exceptions and clarification against ITU-T Recommendation 4.765 (continued) 3.765 Title Remarks 5.2.2 General model Replace “ISUP ASE“ by “prep-APM ASE“. Special explanation and references to ISUP ASE are not a
31、pplicable. The corresponding part of B-ISUP is the combination of CC, BC, UI, MC ASE. References to MTP-3 means MTP3b as well. For this modelling, refer to ITU-T Recommendation Q.2761. Explanations to ISUP APE are not applicable; therefore, the following shall be added: “The prep-APM ASE is defined
32、in this ITU-T Recommendation to take over the additional protocol procedures for APM. The prep-APM ASE acts as a server for the APM ASE for APM related information. The basic call protocol procedures remain in the CC, BC, MC, U1 ASE as it is.“ The following messages in B-ISUP may contain the APP par
33、ameters: IAM, CPG, ANM, ACM, PRI, APM. 5.2.3 Dynamic primitive flows Replace “ISUP ASE“ by “prep-APM ASE“ 7 Application Process functions 7.1 General ISUP basic call means the basic call procedures as defined in ITU-T Recommendation Q.2764. 7.2 For additional procedures, see 5.4. MM Application Proc
34、ess (AP) functions htroduction Primitive interface (AP-SACF) Procedures Primitive contents Single Association Control Function (SACF) - SACF 7.2.1 7.2.2 7.2.3 CON is not applicable to B-ISUP. The additions as defined in 5.4.1 applies. 7.2.4 3 3.1 htroduction Replace “ISUP ASE“ by “prep-APM ASE“ 3.2
35、hformation flows related to messages sent by the node Replace “ISUP ASE“ by “prep-APM ASE“. In the right column of Table WQ.765, replace “Transfer“ by I Transfer-APM“ For additions, refer to 5.4.2.1. 3.3 hformation flows related to messages received by the node Replace “ISUP ASE“ by “prep-APM ASE“.
36、In the right column of Table 13/Q.765, replace “Transfer“ by “Transfer APM“ SDN User Part ASE (ISUP ASE) Replace “ISUP ASE“ by “prep-APM ASE“. The basic call protocol procedures and handling of protocol errors and unrecognized information handling will be done by CC, BC, MC, U1 as it is described in
37、 ITU-T Recommendation Q.2764. Replace “ISUP ASE“ by “prep-APM ASE“. ). 1 Primitive interface ITU-T 4.2765 (12/1999) 3 Table 4-UQ.2765 - Exceptions and clarification against ITU-T Recommendation 4.765 (continued) 4.765 Title Remarks 9.2 Procedures Replace “ISUP ASE“ by “prep-APM ASE“. The basic call
38、procedures are defined in ITU-T Recommendation Q.2764. The pre-APM ASE is responsible for all APM specific protocol procedures of described ISUP ASE (see 5.4.3). For format definition of APM message refer to ITU-T Recommendation Q.2763. 9.3 Primitive contents 10 Application Transport Mechanism ASE (
39、APM ASE) Primitive interface Procedures Normal procedures - Sending See 5.4.2 for additional procedures. 10.1 10.2 10.2.1 CON is not applicable to B-ISUP. The segmentation and re-assembly procedures are extended to support variable segments up to 2048 octets with a maximum of 10 segments, provided t
40、he maximum APM information transfer per APM-user never exceeds 2048 octets. The 272-octet MTP limit is not applicable if MTP3b is used. 10.2.2 10.2.3 10.2.4 10.3 11 Normal procedures - Receiving Sending of acknowledgement Segmentation Primitive contents Application Transport Mechanism User ASE (APM-
41、user ASE) CON is not applicable to B-ISUP. 11.1 Primitive interface 11.2 Procedures 11.2.1 General 1 1.2.2 Signalling congestion 1 1.2.3 Handling of unrecognized signalling information 11.3 Primitive contents 12 Network Interface function For the entire section, refer to clause 5/Q.2764. 13 Unidenti
42、fied Context and Error Handling ASE (UCEH ASE) Introduction of Unidentified Context Handling Mechanism 13.1 13.1.1 Unidentified Context Handling - PAN Replace “ISUP ASE“ by “prep-APM ASE“. 13.1.2 Unidentified Context Handling - PIN Replace “ISUP ASE“ by “prep-APM ASE“. 4 ITU-T 4.2765 (12/1999) Table
43、 4-UQ.2765 - Exceptions and clarification against ITU-T Recommendation 4.765 (concluded) 4.765 I Title I Remarks 13.2 13.3 Re-assembly Error Handling I Primitive interface I 13.4 I Procedures I 13.4.1 13.4.2 13.4.3 13.4.4 13.5 14 Normal procedures - Remote error handling Normal procedures - Local er
44、ror handling Exceptional procedures - Context identifier error Exceptional procedures - Unrecognized Reason value Primitive contents Application Transport Notification Information 15 ITimers I 5 Additional description to ITU-T 4.276-series Recommendations 5.1 No changes. The APM definitions, formats
45、 and codes are included. Additional description to ITU-T Recommendation 4.2761 5.2 No changes. The APM definitions, formats and codes are included. Additional description to ITU-T Recommendation 4.2762 5.3 No changes. The APM definitions, formats and codes are included. Additional description to ITU
46、-T Recommendation 4.2763 5.4 It is the responsibility of the AP to secure the ordering of the initial IAM, ACM, CPG, ANM or PRI message, and of the subsequent SGM and APM messages. Therefore the AP must be informed by the APM ASE about the segmentation status to initiate the sending of further APM m
47、essages or other suitable messages. On receipt of an APM-Segmentation-Status indication (More-APP data available) primitive, the AP shall generate an Application-Transport request primitive. Other call/connection control messages shall be queued until the receipt of an APM-Segmentation-Status indica
48、tion (All APP information sent) primitive. Additional description to ITU-T Recommendation 4.2764 5.4.1 SACF The following text should be considered with ITU-T Recommendation 4.2764: Clause 6/Q.2764 - SACF ITU-T 4.2765 (12/1999) 5 The following behaviow will be assumed by the SACF: The SACF uses alwa
49、ys a primitive of an ASE even though optional parameters of the related primitive are not present. Subclause 6. UQ.2764 - Introduction Subclause 6.2/Q.2764 - Outgoing messages Table 6- UQ.2764 “Mapping between AP and ASE primitives“: Table 5-UQ.2765 - Additional mapping between AP and prep-APM ASE primitives Interface d, from AP Interface to prep-APM ASE I Address Complete.req I Answer.req I Progress.req ApplicationTransport .req Pre-Release-Info.req I prep-APM Set-up req. prep-APMAddressComplete req. prep-APM Answer req . Table 6-2/Q.2764 “Mapping fiom BCC CC and MC ASE p
