1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2150.0 (05/2001) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - Signalling ATM adaptation layer (SAW Generic Signalling Transport Service ITU-T Recommendation Q.2150.0 (Formerly CCIlT Recommendation) I
2、lT .T Q-SERIES RECOMMENDATIONS SWTCEING 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 SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFI
3、CATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 43 INTERFACE DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK INTERNATIONAL AUTOMATIC AND
4、 SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDAFW SYSTEMS SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q. 143 4.4459 Q.6O-Q.99 Q.lOO-Q.119 Q. 120-Q.249 Q.25O-Q.309 4.3104.399 Q.40O-Q.499 Q.50O-Q.599 Q.60O
5、-Q.699 4.700-4.799 Q.SOO-Q.849 Q.SO-Q.999 Q.lOOO-Q.1099 Q.1 lOO-Q.1199 Q. 12004.1699 Q.170O-Q.1799 Q.1900-Q. 1999 II BROADBAND ISDN Q.200O-Q.2999 Q.200O-Q.2099 -*v p- General aspects Signalling network protocols aP?tg! Commonaspects of B-ISDN application protocols for access signalling and network s
6、ignalling and interworking B-ISDN application protocols for the network signalling B-ISDN application protocols for access signalling 4.2600-4.2699 Q.270O-Q.2899 Q.290O-Q.2999 _ For further details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation Q.2150.0 Generic Signalling T
7、ransport Service Summary This Recommendation specifies the Generic Signalling Transport Service that allows the development of signalling specifications without considerations of the idiosyncrasies of the underlying signalling transport mechanisms. Source ITU-T Recommendation Q.2150.0 was prepared b
8、y ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 15 May 200 1. Keywords Asynchronous Transfer Mode (ATM), ATM Adaptation Layer (AAL), Bearer Independent Call Control (BICC), Broadband Integrated Services Network (B-ISDN), Message Transfer Part (MTP), Signallin
9、g AAL (SAAL), Signalling Transport Converter (STC). ITU-T Q.2150.0 (05/2001) 1 FOREWORD The International Telecommunication Union (IT) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. IT
10、U-T is responsible for studying technical, operating and tariff 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 stu
11、dy 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 WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a
12、collaborative 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 draws attention to the possibility that the practice or imple
13、mentation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITIJ 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 proces
14、s. 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 this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly
15、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, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. 11 ITU-T Q.2150.0 (05/2001) CONTENT
16、S 2 2.1 2.2 4 5 5.1 5.2 6 6.1 6.2 6.3 6.4 Scope . References . Normative references Bibliography . Defitions Abbreviations Framework of the Generic Signalling Transport Service . General framework . Conventions Service definition Primitives between signalling entities and the Generic Signalling Tran
17、sport Parameters . Establishment State transition diagram for sequences of primitives of the Generic Signalling Transport service . ITU-T Q.2150.0 (092001) Page 1 1 2 2 3 3 4 6 iii ITU-T Recommendation Q.2150.0 Generic Signailing Transport Service 1 Scope This Recommendation describes the Generic Si
18、gnalling Transport Service. It allows the definition of signalling specifications without considerations of the idiosyncrasies of the underlying signalling transport mechanisms. This Recommendation also describes the interface states and the definition of the service by a number of primitives. The G
19、eneric Signalling Transport Service can be deployed by means of Signalling Transport Converters over a range of signalling transport protocol stacks. NOTE - Signalling Transport Converters are defined, for example, in -T Q.2150.1 6, -T 4.2150.2 7, or -T 4.2150.3 8. This Recommendation is based on th
20、e requirements defined in ITU-T Q-series Supplement 8 (1999), Technical Report TRQ.2400 3 “Transport control signalling requirements - Signalling requirements for AAL, type 2 link control capability set l“, in ITU-T Q-series Supplement 33 (2000), Technical Report TRQ.2401 4 “Signalling requirements
21、for Q.AAL2 capability set 2“, and in ITU-T Q-series Supplement 38 (2001), Technical Report TRQ.2600 5 “BICC signalling transport requirements, capability set 1 I. 2 References 2.1 Normative references The following ITU-T Recommendations and other references contain provisions which, through referenc
22、e 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 revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most rec
23、ent edition of the Recommendations and other references listed below. A list of currently valid ITU-T Recommendations is regularly published. 11 2 ITU-T X.200 (1994), Information technology - Open Systems Interconnection - Basic Reference Model: The basic model. ITU-T X.210 (1993), Information techn
24、ology -Open Systems Interconnection - Basic Reference Model: Conventions for the dejinition of OSI services. 2.2 Bibliography The following ITU-T Recommendations and other documents contain information that may be useful to understanding the usage of this Recommendation. There are no additional prov
25、isions of this Recommendation derived from these documents. 3 ITU-T Q-series Supplement 8 (1999), Technical Report TRQ.2400: Transport control signalling requirements - Signalling requirements for AAL type 2 link control capability set 1. ITU-T Q-series Supplement 33 (2000), Technical Report TRQ.240
26、1: Signalling requirements for Q.AAL2 capability set 2. 4 ITU-T Q.2150.0 (05/2001) 1 ITU-T Q-series Supplement 3 8 (200 i), Technical Report TRQ. 2600 BICC signalling requirements, capability set 1. ITU-T 4.2150.1 (2001), Signalling transport converter on ARP3 and MTP3b. ITU-T 4.2150.2 (2001), Signa
27、lling transport converter on SSCOP and SSCOPMCE. ITU-T 4.2150.3 (2001), Signalling transport converter on SCTP. ITU-T 4.704 (1996), Signalling network functions and messages. ITU-T 4.2210 (1996), Message transferpart level 3 functions and messages using the services of ITU-T Recommendation Q.2140. I
28、TU-T 4.2 1 10 (1 994), B-ISDN ATM adaptation layer - Service specific connection oriented protocol (SSCOP). ITU-T 4.21 1 1 (1 999), B-ISDN ATM adaptation layer - Service specijic connection oriented protocol in a multi-link and connectionless environment (SSCOPMCE). IETF RFC 2960 (2000), Stream Cont
29、rol Transmission Protocol. Definitions Recommendation is based upon the concepts developed in ITU-T X.200 i and ITU-T X.210 2. In addition, for the purpose of this Recommendation, the following definitions apply: 3.1 generic signalling transport service: The function that enables a signalling entity
30、 to communicate with a peer signalling entity independently of the underlying signalling transport. 3.2 signalling transport: A signalling link or network that connects two signalling entities. 3.3 signalling transport converter: A function that converts the services provided by a particular Signall
31、ing Transport to the services required by the Generic Signalling Transport Service. 4 Abbreviations This Recommendation uses the following abbreviations: AAL ATM Adaptation Layer GST Generic Signalling Transport LM Layer Management MTP3 MTP3b Message Transfer Pari level 3 Message Transfer Part level
32、 3 using 4.2140 SAAL Signalling ATM Adaptation Layer SAP Service Access Point SAR Segmentation and Reassembly (Sublayer) SCTP Stream Control Transmission Protocol SSCOP SSCOPMCE sscs Service Specific Convergence Sublayer Service Specific Connection Oriented Protocol Service Specific Connection Orien
33、ted Protocol in a Multilink and Connectionless Environment 2 ITU-T Q.2150.0 (05/2001) STC svc TED vcc VPC 5 5.1 Signalling Transport Converter Switched Virtual Channel Transmission Error Detection Virtual Channel Connection Virtual Path Connection Framework of the Generic Signalling Transport Servic
34、e General framework A signalling protocol entity makes use of the Generic Signalling Transport service which is provided by the Signalling Transport Converter (for example, see ITU-T 4.2150.1 6, ITU-T 4.2150.2 7, or ITU-T 4.2150.3 SI). The Generic Signalling Transport enables a signalling entity to
35、communicate with a peer signalling entity independently of the underlying signalling transports. This Mework is illustrated in Figure 5-1. (this Recommendation) Generic Signalling Transport Service Signalling Transport Converter Specific Signalling Transport T111127Wl Figure 5-UQ.2150.0 - Framework
36、for the Generic Signalling Transport Service Signalling protocols can be deployed over a range of signalling transport protocol stacks. Two peer signalling entities rely on the Generic Signalling Transport service to provide assured data transfer between them and service availability indications; Le
37、., signalling messages are exchanged between peer protocol entities using the Generic Signalling Transport Service. ITU-T Q.2150.0 (092001) 3 Example protocol stacks are shown in Figure 5-2. A Signalling Transport Converter on MTP3 and MTP3b 4.2 150.1 Signalhg Transport Converter on SSCOP 4.2150.2 P
38、rimitives g and the value “65 328“ is used to indicate interworking with SSCOP signalling transports (see IT-T NOTE 2 - The signalling transport based on the Stream Control Transmission Protocol (SCTP, see RFC 2960 131) has no length limitations. ITU-T 4.2210 lo). In particular: 4.704 191); 4.2110 l
39、i andITU-T 4.2111 12). ITU-T Q.2150.0 (05/2001) 5 d) Priority This parameter indicates the priority of the signalling message. NOTE 3 - This parameter is a national option. This parameter indicates to the Signalling Transport Converter a value that can be used by the underlying signalling transport
40、for load sharing andor in-sequence delivery. Signalling messages accompanied by the same Sequence Control value shall be delivered in-sequence. This parameter contains a complete signalling message; it represents the STC SDU. e) Sequence Control 9 STC User Data 6.3 Establishment On the establishment
41、 of a signalling transport and the associated Signalling Transport Converter entity, for example at power-up, the initial conditions are the same as if an OUT-OF-SERVICE.indication had been conveyed across this SAP. Also at this time the START-INF0.indication is sent to the signalling entity. 6.4 Th
42、is clause defines the constraints on the sequences in which the primitives may occur at the layer boundaries of the Generic Signalling Transport service. The sequences are related to the states at one Generic Signalling Transport endpoint between the Generic Signalling Transport service provider and
43、 its user. The possible overall sequences of primitives are shown in the state transition diagram, Figure 6-1. State transition diagram for sequences of primitives of the Generic Signalling Transport service 6 2 In IN-SERVICE.indication o out of Service OUT-OF-SERVICE.hdication - Service START-INFO.mdication TRANSFERxequest TRANSFER.indication 11 1274001 C0NGESTION.indication Figure 6-UQ.2150.0 - State transition diagram for sequences of primitives ITU-T Q.2150.0 (05/2001)
