1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.1902.5 (07/200 I ) SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent Call Control (BICC) Bearer Independent Call Control protocol (Capability Set 2): Exceptions t
2、o the application transport mechanism in the context of BICC ITU-T Recommendation Q. 1902.5 (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 O
3、F SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM RI SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 43 INTERFACE DIGITAL SUBSCRIBER SIGNALLING SYSTE
4、M No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q. 1-4.3 Q .4-Q.59 4.60-4.99 Q. 120-4.249 Q.25O-Q.309 4
5、.3 10-Q.399 4.4004.499 q.1oo-q.i 19 4.500-4.599 Q .600-Q . 6 9 9 4.700-4.799 Q.SOO-Q.849 Q.SSO-Q.999 Q. 1 OOO-Q. 1 O99 Q.llOO-Q.1199 Q.1200-4.1699 O. 1700-Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.19OO-Q.1999 BROADBAND ISDN Q.2000-4.2999 For further deta
6、ils, please refer to the list of ITU-T Recommendations. ITU-T Recommendation Q.1902.5 Bearer Independent Call Control protocol (Capability Set 2): Exceptions to the application transport mechanism in the context of BICC Summary This Recommendation describes exceptions to ITU-T 4.765, Signalling Syst
7、em No. 7 - Application transport mechanism, in the context of bearer independent call control, see -T Q. 1902.1, Bearer Independent Call Control Protocol (Capability Set 2):Functional description. Source -T Recommendation 4.1902.5 was prepared by ITU-T Study Group 11 (2001-2004) and approved under t
8、he WTSA Resolution 1 procedure on 2 July 200 1. ITU-T 4.1902.5 (07/2001) .i FOREWORD The International Telecommunication Union 0 is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is
9、 responsible for studying technical, operating and tarif questions and issuhg Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by t
10、he 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 WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collabo
11、rative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implemen
12、tation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. A
13、s 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 this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urge
14、d to consult the TSB patent database. o ITU 2002 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and micronlm, without permission in writing fiom ITU. 11 ITU-T 4.1902.5 (07/2001) CONTENTS Sco
15、pe . References . Definitions Abbreviations Conventions Exceptions to ITU-T 4.765 ITU-T Q.1902.5 (07/2001) Page 1 1 1 2 2 iii IT-T Recommendation Q.1902.5 Bearer Independent Call Control protocol (Capability Set 2): Exceptions to the application transport mechanism in the context of BICC 1 Scope Thi
16、s Recommendation describes exceptions to ITU-T 4.765, Signalling System No. 7 - Application transport mechanism i, in the context of bearer independent call control, see Recommendation Q. 1902.1, Bearer Independent Call Control protocol (Capability Set 2): Functional description 2. 2 References The
17、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 indicated were valid. All Recommendations and other references are subject to revisions; users of this
18、 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 Recommendations is regularly published. 13 2 3 4 5 6 7 8 ITU-T 4.765 (2000), Signalling System No.
19、 7 - Application transport mechanism. ITU-T 4.1902.1 (2001), Bearer Independent Call Control protocol (Capability Set 2): Functional description. ITU-T 4.1902.3 (2001), Bearer Independent Call Control protocol (Capability Set 2) and Signalling System No. 7 ISDN User Part: Formats and codes. ITU-T Q.
20、 1902.4 (2001), Bearer Independent Call Control protocol (Capability Set 2) Basic call procedures. ITU-T Q.2150.0 (2001), Generic Signalling Transport Sewice. ITU-T 4.2150.1 (2001), Signalling Transport Converter on MTP3 andMTP3b. ITU-T 4.2150.2 (2001), Signalling Transport Converter on SSCOP and SS
21、COPMCE. ITU-T 4.2150.3 (2001), Signalling Transport Converter on SCTP. 3 Definitions See ITU-T 4.765 i and ITU-T 4.1902.1 2. 4 Abbreviations This Recommendation uses the following abbreviations: AEI Application Entity Invocation APM Application Transport Mechanism ASE Application Service Element BAT
22、 Bearer Association Transport BICC Bearer Independent Call Control RU-T 4.1902.5 (07/2001) 1 CSF EH ISUP MTP NI SACF SA0 STC Call Service Function Errors Handling ISDN User Part Message Transfer Part Network Interface Single Association Control Function Single Association Object Signalling Transport
23、 Converter 5 Conventions See ITU-T Q. 1902.1 2, clause 5 Conventions. 6 Exceptions to ITU-T Q.765 ITU-T 4.765 i applies with the following exceptions. The reference to Signalling System No. 7 in the title is not relevant. Where the text refers to ISUP this shall be interpreted to mean BICC. The subs
24、equent subclause numbers (after the dash) within this clause correspond to the numbering 6 - 6.2.2 General model BICC is an adaptation of the narrow-band ISUP protocol for use in a bearer and message transport independent environment. It thus includes significantly different procedures for basic cal
25、l control, compared to ISUP. It also includes an APM User for the transport of BICC specific information between peer BICC entities. The generalized model for the ISUP Application Transport Mechanism Application Process is presented in Figure 2/Q.765 i. In this model, the application logic for the A
26、PM users are considered to be within the Nodal functions (Application Process). ISUP basic call Recommendation (ITU-T 4.764) includes specification of ISUP signalling procedures and nodal functions (Application Process functions) in a monolithic way, i.e. the partitioning of functionality between th
27、e ISUP ASE and ISUP Nodal functions is not defined. -T 4.765 i also does not define the functionality split for ISUP basic call. The model from Figure 2/Q.765 i applied on the BICC basic call is shown in Figure 1. within -T 4.765 13. 2 WU-T 4.1902.5 (07/2001) I BAT ASE b - SAU SA0 - EH ASE C d APM A
28、SE e BICC ASE I NI I 1 Figure UQ.1902.5 - BICC specification model In this model the BAT ASE is introduced to provide the transport for the BICC data, and the ISUP ASE has been replaced by a BICC ASE. It should be noted that there is still no definition of the split of functionality between the BICC
29、 ASE and the Nodal functions. The replacement of the ISUP ASE by the BICC ASE just signifies that the BICC signalling is not the same as ISUP signalling. The BICC procedures, insofar as they are the user of the BAT ASE, should be considered as a part of the Nodal functions (in order to conform with
30、the model expected in ITU-T 4.765 i). The BICC procedures thus access the service provided by the BAT ASE by using the BICC-Data primitive at interface a. The BICC procedures indicated by the BICC procedures block in Figure 4/Q.1902.1 2, and described in ITU-T 4.1902.4 4, correspond to the composite
31、 of the BICC Nodal functions, (as a BAT ASE user), and the BICC ASE. No attempt is made to (provide distinct descriptions of these two modelling entities. The interface h is the BICC Signalling Transport Service primitive interface as specified in ITU-T 4.2 150.0 5 while interface g is the specific
32、signalling transport service (see -T 4.2 15O.X-series of Recommendations, e.g. 6, 7, SI), and, in case of MTP-3 signalling transport, is the same as described in lTU-T 4.765 i. ITU-T 4.1902.5 (07/2001) 3 6 - 10.2.1 Normal procedures - Sending Clause 10.2.UQ.765 i states that the 272 octet limit of t
33、he MTP is the reason that would cause APM segmentation to be invoked. This statement is applicable to BICC if the START-INFO.indication primitive received fiom the STC, see ITU-T Q.2150.0 SI, indicates that the underlying message transport mechanism can transport only 272 octets. However, if the tra
34、nsport can support greater than 272 octets then APM segmentation is only applicable if the BICC application information exceeds the 255 octet limit imposed by the parameter formatting rules of 6 - 12 Network interface function Clause 12/Q.765 i applies with the following exceptions: 1) 2) 3) 4) 5) I
35、TU-T 4.1902.3 3. When the text refers to MTP it shall be interpreted to mean the actual signalling transport. When the text refers to CIC it shall be interpreted to mean Call Instance Code. When the text refers to IT-T 4.763, it shall be interpreted to be a reference to ITU-T. 4.1902.3 3. When the t
36、ext refers to ITU-T 4.764, it shall be interpreted to be a reference to ITU-T 4.1902.4 4. There is one instance of signalling transport converter per signalling route, and thus the distribution function performed by the NI acts only upon the CIC value. When the signalling transport is MJ“ the OPC, D
37、PC, SI0 and SLS are handled within the MTP3MTP3b signalling transport converter as described in ITU-T 4.2 150.1 6. Primitive interface g shall be replaced by the primitive interface as described in the Q.2150.x-series of Recommendations (e.g. 6, 7, SI). 6) 4 ITU-T 4.1902.5 (07/2001) SERIES OF ITU-T
38、RECOMMENDATIONS series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z Organization of the work of ITU-T Means of expression: defi
39、nitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and mult
40、imedia systems Integrated services digital network Cable networks and transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: internat
41、ional transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and s
42、ignalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general software aspects for telecornmunication systems -*- 2 1 6 6 6 * Printed in Switzerland Geneva, 2002
