ITU-T Q 2933-1996 Digital Subscriber Signalling System No 2 (DSS 2) - Signalling Specification for Frame Relay Service - Series Q Switching and Signalling Broadband ISDN - B-ISDN A用.pdf

1、 STD-ITU-T RECMN -2733-ENGL L77b U 48b259L Ob27L87 082 R INTERNATIONAL TELECOMMUNICATION UNION ITUmT TELECOMMUNICATION STANDARDIZATION SECTOR OF TU Q.2933 SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access Sig na1 I ing (07/96) Digital Subscriber Signalling S

2、ystem No. 2 (DSS 2) - Signalling specification for Frame Relay service ITU-T Recommendation Q.2933 (Previously CCITT Recommendation) STD-ITU-T RECMN Q-2733-ENGL L97b 48b257L Ob27LBB T19 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE FUNCTIONS A

3、ND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATION 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 SPECIFICATIONS OF SIGNALLING

4、SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN General aspects ATM adaptation layer Signalling network protocols Common aspects of B-ISDN application protocols for access signalling and

5、network signalling and interworking INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.1-Q.3 Q.4-Q. 59 Q.60-Q.99 Q.100-Q.119 Q. I 204.249 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. I O99 Q. 11 OO-Q.

6、1 199 Q.1200-Q.1999 Q.2000-Q.2999 Q.2000-Q.2099 Q.21 OO-Q.2199 Q.2200-Q.2599 Q .2600-Q .2699 B-ISDN application protocols of the network Q.2700-Q.2899 li For further details, please refer to ITU-T List of Recommendations. DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 (DSS 2) - SIGNALLING SPECIFICATION

7、FOR FRAME RELAY SERVICE Summary This Recommendation defines the operation of the Digital Subscriber Signalling System Number 2 (DSS 2) for the support of the Frame relay service that may be provided, as a network provider option, at the T, or at the coincident SB and TB reference point of the User t

8、o Network Interface of the Broadband Integrated Services Digital Network (B-ISDN). The signalling procedures defined in this Recommendation spec only the extensions to Recommendations 4.2931 and Q.2961.1 and do not repeat states, messages, information elements and procedures contained therein. The s

9、ignalling procedures defined support only single step Frame relay callconnection control with one ATM virtual connection supporting one frame relay connection. Source ITU-T Recommendation 4.2933 was prepared by ITU-T Study Group 11 (1993-1996) and was approved under the WTSC Resolution No. 1 procedu

10、re on the 9th of July 1996 . STD-ITU-T RECMN Q.2913-ENGL 199b W iBb259L Ob27190 b77 = FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITLJ Telecommunication Standardization Sector (ITU-T) is a permanent organ of th

11、e ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes th

12、e topics for study by the IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purv

13、iew, 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 administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws

14、attention to the possibility that 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

15、or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU hadhad not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may

16、 not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1997 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 pe

17、rmission in writing from the IT. Recommendation Q.2933 (07/96) 11 Page 1 Scope 2 References 3 Definitions 4 Abbreviations . 5 5.1 6 6.1 6.2 6.3 7 7.1 7.2 Description General description Operational requirements . Provision and withdrawal . Requirements at the originating network side Requirements at

18、 the terminating network side . Primitive and state definitions Primitive definitions . . . Call states 8 Coding requirements 8.1 Messages . 8.1.1 ALERTING . 8.1.2 CALL PROCEEDING 8.1.3 CONNECT 8.1.4 CONNECT ACKNOWLEDGE 8.1.5 RELEASE . 8.1.6 RELEASE COMPLETE . 8.1.7 SETUP . 8.1.8 STATUS 8.1.9 STATUS

19、 ENQUIRY . 8.2 Messages used with global call reference . 8.3 Information Elements . Message type (including message compatibility instruction indicator) 8.3.1 8.3.2 ATM Adaptation Layer parameters 8.3.3 ATM traffic descriptor 8.3.5 Called party number 8.3.6 Calling party number . 8.3.7 Notification

20、 Indicator 8.3.8 Link layer core parameters 8.3.4 Broadband bearer capability 1 1 2 2 2 3 3 3 3 3 4 4 4 4 4 4 4 4 4 5 5 5 Recommendation Q.2933 (07/96) . 111 STD-ITU-T RECMN Q-2933-ENGL L99b 48b259L Ob27172 44T 9 9.1 9.2 10 11 11.1 11.2 11.3 12 13 14 15 8.3.9 Link layer protocol parameters Signallin

21、g procedures at the coincident S, and T. reference point Handling of error conditions . Notification procedure Signalling procedures at the T. reference point for interworking with private B-ISDNS . Interworking with other networks Interaction with entities which do not support the 4.2933 capabiliti

22、es . Interworking with N.ISDN . Interworking with PDNs which support the Frame Relay Data Transmission Service Interactions with supplementary services . Parameter values . Dynamic description (SDLs) B-ISDN Frame Relay data transfer phase protocol Page 9 9 9 10 10 10 10 10 10 Il 11 11 11 iv Recommen

23、dation 4.2933 (07/96) STD-ITU-T RECMN 8.2733-ENGL 177b D llBb2591 Ob27193 38b M Recommendation Q.2933 DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. 2 (DSS 2) - SIGNALLING SPECIFICATION FOR FRAME RELAY SERVICE (Geneva, 1996) 1 Scope This Recommendation specifies the procedures for the establishing, mainta

24、ining and clearing of Broadband Integrated Services Digital Network (B-ISDN) Frame Relaying connections at the User-network interface. These procedures are defined in terms of messages and procedures at the T, reference point or coincident S, and TB (SB/TB) reference point as defined in Recommendati

25、on 1.413 i by means of the Digital Subscriber Signalling System No. 2 (DSS 2). The capability specified in this Recommendation also allows the user of the Frame Relaying bearer service to access a frame handler in a B-ISDN. This Recommendation is part of the DSS 2 family of ITU-T Recommendations; it

26、 specifies extensions to Recommendation 4.293 1 , and does not repeat states, information elements, messages and procedures contained therein, but only specifies extensions related to Frame Relay service. This Recommendation does not cover procedures for the negotiation and modificationhenegotiation

27、 of traffic parameters. This Recommendation supports only single step call control with one virtual connection supporting only one frame relay connection. Multiple frame relay switched virtual connections (each identified by a DLCI value at the FR-SSCS level) over a single broadband virtual channel

28、connection is not supported. Whenever differences exist in procedures, messages and/or information elements, these are clearly pointed out and fully specified. Information elements of Recommendation Q.293 1 which are applicable for B-ISDN calls providing Frame Relaying bearer service, but require no

29、 enhancements are handled by direct reference to Recommendation Q.293 1. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. All references are subject to revision; all users of

30、this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the references listed below. A list of the currently valid ITU-T Recommendations is regularly published. i 2 3 4 5 ITU-T Recommendation 1.41 3 (1993), B-ISDN user-network interface. ITU

31、-T Recommendation Q.293 1 (1 995), Digital Subscriber Signalling System No. 2 - User- Network Interface (UNI) layer 3 specif cation for basic call/connection control. CCITT Recommendation 1.233.1 (1 99 1 ), Frame mode bearer services: ISDNJFame relaying bearer service. ITU-T Recommendation 4.933 (19

32、95), Signalling specification for JFame mode basic call control. ITU-T Recommendation 1.365.1 (1993), B-ISDN ATM adaptation layer sublayers: Frame Relaying Service SpeciJic Convergence Sublayer FR-SSCS) . Recommendation 4.2933 (07/96) 1 - STD-ITU-T RECMN Q-2733-ENGL 177b M 9Bb2571 Ob27174 212 = ITU-

33、T Recommendation 1.361 (1 995), B-ISDNATMlayer speczjication. ITU-T Recommendation Q.296 1.1 (1 999, Digital Subscriber Signalling System No. 2 (DSS 2) - Additional trafic parameters: Additional signalling capabilities to support trafic parameters for the tagging option and the sustainable cell rate

34、 parameter set. ITU-T 4.295 1 -Series Recommendations (1 999, Stage 3 description for number identijcation supplementary services using B-ISDN Digital Subscriber Signalling System No.2 (DSS 2) - Basic Call. ITU-T Q.2957-Series Recommendations (1 995), Sage 3 description for additional information tr

35、ansfer supplementary services using B-ISDN Digital Subscriber Signalling System No. 2 (DSS 2) - Basic Call. ITU-T Recommendation 1.555 (1 993), Frame relaying bearer service interworking. Definitions The definitions of Annex J/Q.293 1 2 apply. 4 Abbreviations The abbreviations of Annex J/Q.2931 2 ap

36、ply. For the purpose of this Recommendation, the following abbreviations apply in addition: CPCS Common Part Convergence Sublayer DLCI Data Link Connection Identifier EX Exchange FH Frame Handler FR-SSCS PDN Public Data Network PHY Physical Layer Protocol SAR Segmentation and Reassembly Frame Relayi

37、ng Service Specific Convergence Sublayer 5 Description The overall description of fiame relaying bearer service is specified in Recommendation 1.233.1. The B-ISDN Frame Relaying bearer service provides the bidirectional transfer of Service Data Units (SDUs) with the order preserved. The service is p

38、rovided to the user by the Frame Relaying Service Specific Convergence Sublayer (FR-SSCS) specified in Recommendation 1.365.1 above the AAL Type 5 common part. The FR-SSCS provides the Core services as described in Annex C4.233.1. Figure 5-1 shows the communication scenario where a Frame Relaying co

39、nnection is established between two B-ISDN users. 2 Recommendation Q.2933 (07/96) B-ISDN TE or concatenation of several TE B-ISDNs l I I I TI 179050-96 Figure 5-UQ.2933 - Frame Relaying connection established between two B-ISDN users 5.1 General description The B-ISDN Frame Relaying bearer service h

40、as the following characteristics: 0 Provides the bidirectional transfer of Service Data Units from T, or S,/T, reference point to All C-plane procedures are performed in a logically separate manner. The U-plane procedures use the services provided by AAL Type 5 common part on a Virtual another with

41、the order preserved. Channel Connection (VCC) basis and FR-SSCS above it. 6 Operational requirements 6.1 Provision and withdrawal The additional traffic indications may be included in signalling messages by the user as specified in this Recommendation without any prior arrangement with the service p

42、rovider. 6.2 The procedures according to clause 9 shall apply. Requirements at the originating network side 6.3 The procedures according to clause 9 shall apply. Requirements at the terminating network side 7 Primitive and state definitions 7.1 Primitive definitions Clause 814.293 1 shall apply. 7.2

43、 Call states See clause 2Q.293 1. No additional call states are defined. 3 Recommendation Q.2933 (07/96) STD-ITU-T RECMN Q-2933-ENGL L99b H 48b257L Ob27L7b 075 = 8 Coding requirements Information element Link layer core parameters Link layer protocol parameters 8.1 Messages No additional messages ar

44、e specified beyond the ones of 3.VQ.2931 and Recommendation Q.296 1.1. Reference Direction Type Length 8.3.8 Both O (Note 1) 4-29 8.3.9 Both O(Note2) 4-11 8.1.1 ALERTING See 3.1. UQ.293 1. 8.1.2 CALL PROCEEDING See 3.1.2/Q.293 1. 8.1.3 CONNECT This message is sent by the called user to the network a

45、nd by the network to the calling user to indicate call acceptance by the called user. See Table 1 for additions to the structure of this message shown in Table 3-2/Q.2931 and Table lQ.2961.1. Table UQ.2933 - CONNECT message additional content 8.1.4 CONNECT ACKNOWLEDGE See 3.1.4/Q.293 1. 8.1.5 RELEAS

46、E See 3.1.5/Q.293 1. 8.1.6 RELEASE COMPLETE See i. 1.6/Q.293 1. 8.1.7 SETUP This message is sent by the calling user to the network and by the network to the called user to initiate call/connection establishment. See Table 2 for additions to the structure of this message shown in Table 3-WQ.2931 and

47、 Table 8-2lQ.2962. 4 Recommendation Q.2933 (07196) STD-ITU-T RECMN Q-2933-ENGL 199b 48b259L Ob27177 T21 = Table 2/Q.2933 - SETUP message additional content Information element Link layer core parameters Link layer protocol parameters Reference Direction TY Pe Length 8.3.8 Both O (Note 1) 4-29 8.3.9

48、Both O(Note2) 4-11 8.1.9 STATUS ENQUIRY See 3.1.9/Q.2931. 8.2 See 3.314.293 1. Messages used with global call reference 8.3 Information Elements See clause 414.293 1. The subclauses which are modified are given in the following subclauses. 8.3.1 Subclause 4.4.UQ.293 1 applies for B-ISDN Frame Relay

49、service with the following exceptions: - Message type (including message compatibility instruction indicator) In Table 4-2/Q.2931 (part 1 of 2), the following codepoints are not supported for Frame Relay call control: Bits 87654321 00001101 SETUP ACKNOWLEDGE 01111011 INFORMATION 8.3.2 ATM Adaptation Layer parameters The B-ISDN Frame Relay user plane procedures use the service provided by ATM Adaptation layer (AAL) Type 5. Subclause 4.5.YQ.293 1 applies with the following exceptions: Figure 4-12/Q.2931 (parts 2, 3 and 5 of 5) do not apply. AAL infomati