1、ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF TU Q.2931 Amendment 2 (03199) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN, - B-ISDN application protocols for access signal I i ng . Digital subscriber signalling system No. 2 - User-network interface (UNI) layer 3 specification Amendment 2 for
2、 basic calkonnection control ITU-T Recommendation Q.2931 - Amendment 2 (Previously CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING FUNCTIONS AND INFORMATION FLOWS FOR SERVI
3、CES IN THE ISDN SLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS SPECIFICATIONS OF 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 SPECIFICATION
4、S OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN General aspects Signalling ATM adaptation layer (SAAL) Signalling networ
5、k protocols Q.1-Q.3 Q.4-Q.59 Q .60-Q . 99 Q. 1 OO-Q. 1 1 9 Q. I 20-Q. 249 Q.250-Q.309 Q.310-Q.399 Q.400-Q.499 Q.500-Q.599 Q.600-Q.699 Q .700-Q.849 Q.850-Q.999 Q. 1000-Q. 1 O99 Q.1100-Q.1199 Q.1200-Q. 1699 Q.1700-Q.1799 Q.2000-Q.2999 Q.2000-Q.2099 Q.2100-Q.2199 Q.2200-Q.2299 Common aspects of B-ISDN
6、application protocols for access signalling and network signalling and interworking Q.260-Q.269S B-ISDN application protocols for the network signalling Q.2700-Q.289S 999 o. For fisther details, please refer fo ITU-T List of Reconzmendations. ITU-T RECOMMENDATION Q.2931 DIGITAL SUBSCRIBER SIGNALLING
7、 SYSTEM NO. 2 - USER-NETWORK INTERFACE (UNI) LAYER 3 SPECIFICATION FOR BASIC CALL/CONNECTION CONTROL AMENDMENT 2 Summary Recommendation 4.293 1 provides basic call and connection control for point-to-point connections in a B-ISDN. Amendment 2 to Recommendation 4.2931 has been prepared to allow signa
8、lling of AAL parameters associated with ATM Adaptation Layers specified in the I-series Recommendations since the original publication of Recomiiiefidation Q.2931 and is designed to be compatible with implementations conforming to the first edition of Recommendation 4.293 1 (1 995). The changes from
9、 Recommendation 4.293 1 (1995) specifi B-ISDN call control to support advances made in the I-series Recommendations concerned with ATM Adaptation Layer protocols that have been introduced since the original publication of 4.293 1 (1 995). Specifically, this amendment includes support for the followi
10、ng Recommendations: - ITU-T Recommendation 1.363.1 (1 996), B-ISDN ATM Adaptation Layer specijkation: Type I AAL. ITU-T Recommendation 1.363.2 (1 997), B-ISDN ATM Adaptation Layer speciJication: Type 2 AAL. ITU-T Recommendation 1.363.3 (1 996), B-ISDN ATM Adaptation Layer specification: Type 3/4 AAL
11、. ITU-T Recommendation 1.363.5 (1 996), B-ISDN ATM Adaptation Layer specification: Type 5 AAL. ITU-T Recommendation 1.365.1 (1 993), B-ISDN ATM adaptation layer sublayers: Frame relaying service speclJic convergence sublayer (FR-SSCS). ITU-T Recommendation 1.365.2 (1 995), B-ISDN ATM adaptation laye
12、r sublayers: Service specific coordination function to provide the connection-oriented network service. ITU-T Recommendation 1.365.3 (1 995), B-ISDN ATM adaptation layer subluyers: Service specijk coordination function to provide the connection-oriented transport service. ITU-T Recommendation 1.366.
13、1 (1998), Segmentation and Reassembly Service SpeciJic Convergence Sublayer for the AAL Type 2. ITU-T Recommendation 1.366.2 (1999), AAL Type 2 SSCS for trunking. ITU-T Recommendation 4.21 10 (1994), B-ISDN ATM adaptation layer - Service specific connection oriented protocol (SSCOP) . - - - - - - -
14、- - Source Amendment 2 to ITU-T Recornmendation 4.2931 was prepared by ITU-T Study Group 11 (1 997-2000) and was approved under the WTSC Resolution No. 1 procedure on 15 March 1999. Recommendation Q.293UAmd.2 (03/99) 1 FOREWORD ITU (International Telecommunication Union) is the United Nations Specia
15、lized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The KU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunication
16、s on a worldwide 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 their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T i
17、s covered by the procedure laid down in WTSC Resolution No. 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 term recognized operating agency (ROA) includes any
18、 individual, company, corporation or governmental organization that operates a public correspondence service. The terms Administration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL, PROPERTY RIGHTS The ITU draws attention to the possibility th
19、at the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The 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 Recomm
20、endation development process. As of the date of approval of this Recommendation, the 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 informat
21、ion and are therefore strongly urged to consult the TSB patent database. O ITU 1999 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 the ITU.
22、11 Recommendation Q.293UAmd.2 (03/99) CONTENTS Page Annex F - ATM adaptation layer parameters indication and negotiation . ATM adaptation layer parameter indication in the SETUP message . F.3 Maximum CPCS-SDU size negotiation . 13 F.4 MID range negotiation . 13 entity in the user plane Use of maximu
23、m CPS-SDU size by the AAL 2 entity in the user plane . 12 F.l General . 12 F.2 12 F.5 F.6 Use of forward and backward maximum CPCS-SDU size by the AAL 3/4 or 5 14 14 Recommendation Q.293UAmd.2 (03/99) iii _ Introduction This amendment to Recommendation 4.2931 has been prepared to allow compatibility
24、 with implementations conforming to the first edition of Recommendation 4.293 1 (1995). The changes from Recommendation 4.293 1 (1 995) speciSl B-ISDN call control to support advances made in the I-series Recommendations concerned with ATM Adaptation Layer protocols that have been introduced since t
25、he original publication of 4.293 1 (1995). Specifically, this amendment includes support for the following Recommendations: - ITU-T Recommendation 1.363.1 (1996), B-ISDN ATM Adaptation Layer: Type I AAL specification. ITU-T Recommendation 1.363.2 (1997), B-ISDN ATM Adaptation Layer: Type 2 AAL speci
26、fication. ITU-T Recommendation 1.363.3 (1996), B-ISDN ATM Adaptation Layer: Type 3/4 AAL specipcation. ITU-T Recommendation 1.363.5 (1996), B-ISDN ATM Adaptation Layer: Type 5 AAL specijkation. ITU-T Recommendation 1.365.1 (1 993), B-ISDN ATM adaptation layer sublayers: Frame relaying service spec c
27、onvergence sublayer (FR-SSCS). ITU-T Recommendation 1.365.2 (1 995), B-ISDN ATM adaptation layer sublayers: Service specijk coordination function to provide the connection-oriented network service. ITU-T Recommendation 1.365.3 (1 995), B-ISDN ATM adaptation layer sublayers: Service speclJic coordina
28、tion function to provide the connection-oriented transport service. ITU-T Recommendation 1.366.1 (1 998), Segmentation and Reassembly Service Speci3c Convergence Sublayer for the AAL Type 2. ITU-T Recommendation 1.366.2 (1999), AAL Type 2 SSCS for trunking. - - - - - - - - - ITU-T Recommendation 4.2
29、 1 1 O (1 994), B-ISDN A TM adaptation layer - Service speciJic connection orientedprotocol (SSCOP). NOTE - This amendment to Recommendation Q.2931 does not include an explicit modification of the reference list in Annex J/Q.2931. It is expected that a future amendment or revision of Recommendation
30、Q.293 1 will include the following additions to the list of references: - ITU-T Recommendation 1.363.1 (1996), B-ISDN ATM Aduptation Layer: Type I AAL specification. ITU-T Recommendation 1.363.2 (1997), B-ISDN ATM Adaptation Layer: Type 2 AAL specification. ITU-T Recommendation 1.363.3 (1996), B-ISD
31、N ATM Adaptation Layer: Type 3/4 AAL specijcation. ITU-T Recommendation 1.363.5 (1996), B-ISDN ATM Adaptation Layer: Type 5 ML specification. ITU-T Recommendation 1.365.1 (1993), B-ISDN ATM adaptation layer sublayers: Frame relaying service specific convergence sublayer (FR-SSCS). ITU-T Recommendati
32、on 1.365.2 (1 995), B-ISDN ATM adaptation layer sublayers: Service specijk coordination function to provide the connection-oriented network service. ITU-T Recommendation 1.365.3 (1995), B-ISDN ATM adaptation layer sublayers: Service specific coordination function to provide the connection-oriented t
33、ransport service. - - - - - - iv Recommendation Q.293UAmd.S (03/99) ITU-T Recommendation 1.366.1 (1 998), Segmentation and Reassembly Service SpeciJc Convergence Sublayer for the AAL Type 2. ITU-T Recommendation 1.366.2 (1999), AAL Type 2 SSCS for trunking. CCITT Recommendation Q.320 (1988), (Signal
34、ling System RI) Signal code for register signalling. CCITT Recommendation 4.322 (1 988), (Signalling System RI) Multifrequency signal sender. CCITT Recommendation 4.323 (i 988), (Signalling System RI) Multifrequency signal receiving equipment. CCITT Recommendation Q.44 1 (1 988), (Signalling System
35、R2 - Intevregister signalling) Signalling code. IEEE Standard 802-1990, IEEE Standards for Local and Metropolitan Area Networks: Overview and Architecture. Recommendation Q.2931lAmd.2 (03/99) V Recommendation Q.2931 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 - USER-NETWORK INTERFACE (UNI) LAYER 3 SP
36、ECIFICATION FOR BASIC CALL/CONNECTION CONTROL AMENDMENT 2 (Geneva, i 999) Replace 4.5.5 (AAL parameters parameter) and Annex F (ATM adaptation parameters indication and negotiation) with the text presented in this amendment. -i. - 1) Subclause 4.5.5 Replace subclause 4.5.5 with the following text: 4
37、.5.5 ATM adaptation layer parameters The purpose of the ATM adaptation layer (AAL) parameters infomation element is to indicate the requested AAL parameter values (end-to-end significance) for the ATM adaptation layer elements of procedures to be used for the call. It contains the parameters selecta
38、ble by the user for all AAL sublayers. The contents of this information element is transparent for the network, except for the case of intenvorking. The maximum length of this information element is 24 octets. The AAL parameters information element is coded as shown in Figure 4- 12 and Table 4-6. 1
39、Octets 8765 43 2 AAL prameters information element identifier 1 IE instruction field Coding 2 shndard Flag Res. IE action ind. i: Length of AAL parameter contents t A AL type TI 162660-9 Further contents depending on AAL type (see below) Figure 4-12/Q.2931- AAL parameters information element (part I
40、 of8) Recommendation Q.293UAmd.2 (03/99) I (further contents for AAL type i) Q Subtype CBR rate identifier /10000 1 1 O I CBR rate Multiplier identifier I: o o o o 11 1 - Multiplier Source clock frequency recovery method identifier 1 O00 1 O0 O Source clock frequency recovery method I Error correcti
41、on method identifier 1 O00 1 O0 1 Error correction method Structured data transfer block size identifier 1 O00 1 O 1 O - Structured data transfer block size - Partially filled cells method identifier II000 1 O 1 1 I Partially filled cells method Octets 6 6.1 I 7.1 8* (Note) 8.1* (Note) 8.2* (Note) 9
42、* 9.1 1 o* 10.1* 1 I* 11.1* 11.2* 12* 12.1* i1 162670-94 NOTE - These octets are only present if octet 7.1 indicates “n x 64 kbit/s or n x 8 kbitls“. Figure 4-12/Q.2931- AAL parameters information element (part 2 of8) 2 Recommendation Q.2931Amd.2 (03/99) (further contents for AAL type 3/4) 876543 2
43、1 Forward maximum CPCS-SDU size identifier 1 O00 1 1 O0 - - Forward maximum CPCS-SDU size Backward maximum CPCS-SDU size identifier 1 000000 1 - - Backward maximum CPCS-SDU size MID range identifier 1 000001 O - - MID range (lowest MID value) - MID range (highest MID value) t SSCS-type identifier II
44、0000 100 I SSCS-type ktets 6* 6.i* 6.2* 7* 7.1* 7.2* 8* 8.1* 8.2* 8.3* 8.4* 9* 9.1* TI 162680-94 NOTE - The indication of values for octet groups 6-8 for use in the CONNECT message .C 4. A n is speciriea in xnnex r . Figure 4-12lQ.2931- AAL parameters information element (part 3 of8) Recommendation
45、Q.293UAmd.2 (03/99) - 3 (further contents for AAL type 5) Forward maximum CPCS-SDU size identifier User defined AAL information User defined AAL information User defined AAL information User defined AAL information Forward maximum CPCS-SDU size - 5.1* 5.2* 5.3* 5.4* Backward maximum CPCS-SDU size id
46、entifier Il 000000 1 Backward maximum CPCS-SDU size - t SSCS-type Octets 6* 6.1* 6.2 7* 7.1* 7.2* 8* 8.1 4 Recommendation Q.293UAmd.2 (03/99) (further contents for AAL type 2) Maximum CPS-SDU size identifier 1 O 1 O O O O 1 Maximum CPS-SDU size Maximum number of multiplexed channels identifier 1 O 1
47、 O O O 1 O Maximum number of multiplexed channels SSCS type identifier 1 O O O O 1 O O SSCS type 6* 6.1* 7* 7.1* 8* 8.1* Further contents depending on SSCS type (see below) Figure 4-12/Q.2931- AAL parameters information element (part 6 of8) SSCS type for SAR parameters identifier 1 O 1 O O 1 O 1 Ass
48、ured Error Reserved data detect (further contents for SSCS type = SAR, defined in Recommendation 1.366.1) 9* 9.1* Backward maximum SSSAR-SDU size identifier 1 O 1 O 1 O O 1 Backward maximum SSSAR-SDU size Forward maximum SSSA-SDU size identifier I1 O 1 O 1 O O o I 1o* 10.3* 11* 11.1* I Forward maxim
49、um SSSAR-SDU size I 10.1 L I 10.2 I I llTS* Figure 4-12/Q.2931- AAL parameters information element /art 7 of8) Recommendation Q.293UAmd.2 (03199) 5 STDOITU-T RECMN Qu2733 AND 2:ENGLJ779 II 4862573 Obbh3-3 489 Ei SSCS type for trunking parameters identifier 1 O 1 O O 1 1 O Service category I CMD I FMD I Reserved Reserved 1 Fax I CAS I DTMF I MF-RI 1 MF-R2 1 PCM (further contents for SSCS for ource clock frequency recovery method (ociet 9.1 for AAL type 1) 3its I7654321 1 O O O O O O O ) O O O O O O 1 1 O O O O O 1 O U1 other values are reserved. Frror convetion meth
