1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2766.1 (05/98) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for the network signalling Switched virtual path capability ITU-T Recommendation Q.2766.1 (Previously CCITT Re
2、commendation) ITU-T Q-SERI ES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIG
3、NALLING 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 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE S
4、YSTEMS INTELLIGENT NETWORK BROADBAND ISDN General aspects Signalling ATM adaptation layer (SAAL) Signalling network protocols Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.l-Q.3 Q.4-Q.59 Q.6
5、0-Q.99 Q. 100-Q.119 Q. 1 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. 1 100-Q.1199 Q.1200-Q.1999 Q.2000-Q.2999 Q.2000-Q.2099 Q.2100-Q.2199 Q.2200-Q.2299 Q.2600-Q.2699 B-ISDN application protocols for the network signalling 4.2
6、70o-Q.2899 B-ISDN application protocols for access signalling Q.2900-Q.2999 For Jitrther details. please refer to ITU-T List of Recommendations. STDsITU-T RECMN d-27bb.l-ENGL 1998 H qBb2591 Ob53838 9T5 ITU-T RECOMMENDATION Q.2766.1 SWITCHED VIRTUAL PATH CAPABILITY Summary This Recommendation specifi
7、es extensions to the Broadband ISDN User Part (B-ISUP) protocol to support Switched Virtual Path (SVP) service in a point-to-point configuration. This Recommendation allows for the use of parameters already specified by Recommendations Q.2761, Q.2762, 4.2763, and 4.2764 for the B-ISDN basic call at
8、the “I, in order to support the Switched Virtual Path capability. Source ITU-T Recommendation 4.2766.1 was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 15th of May 1998. FOREWORD IT (International Telecommunication Union) is the Unite
9、d Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the IT. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing t
10、elecommunications 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 Member
11、s 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 purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is use
12、d for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. Th
13、e 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. As of the date of approval of this Recommendation, the ITU had not received notice of intel
14、lectual 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 urged to consult the TSB patent database. O ITU 1998 All rights reserved. No part of this
15、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. 11 Recommendation 4.2766.1 (05198) 1 1.1 1.2 1.3 2 2.1 2.2 3 3.1 3.2 3.3 CONTENTS Page Overview Scope References Abbrevia
16、tions . B-ISDN User Part messages and parameters . Parameters and parameter subfields . 2.2.1 Broadband bearer capability 2.2.2 Connection element identifier . 2.2.3 OAM traffic descriptor 2.2.4 Resource identifier Messages . Call control. application process functions Introduction 3.1.1 Assignment
17、procedure of VPCI and bandwidth Successful call/connection Set-up . 3.2.1 Forward address signalling - en bloc 3.2.2 Forward address signalling - Overlap operation . 3.2.3 Address-Complete request primitive 3.2.4 Progress . 3.2.5 Answer primitive . Transit network selection (national option) Storage
18、 and release of information Simple segmentation (national option) . . 3.2.6 Forward-Transfer primitive 3.2.7 3.2.8 3.2.9 Unsuccessful call/connection Set-up . 3.3.1 Lack of resources at the incoming side . 3.3.2 Lack of resources at the outgoing side 3.3.3 Actions at an exchange receiving an Incomin
19、g-Resources-Rejected Primitive 3.3.4 3.3.5 Address incomplete . 3.3.6 Tones and announcements Actions at an exchange receiving a Release message . 3.4 Normal callconnection release 3.4.1 General 3.4.2 Release Initiated by a calling party . 3.4.3 Release initiated by a called party . 2 2 4 4 4 5 5 8
20、11 12 13 13 13 13 13 14 14 14 14 14 14 15 15 15 15 15 Recommendation Q.2766.1 (05/98) 3.5 3.6 3.7 3.8 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 5 6 6.1 6.2 iv 3.4.4 Release initiated by the network . Suspend. Resume (network initiated) . Propagation delay determination Error indication primitive .
21、3.6.1 Procedure . Primitive contents . Maintenance control. application process functions . Introduction Reset . 4.2.1 Actions at Reset initiating exchange . 4.2.2 Actions at Reset responding exchange 4.2.3 Abnormal reset procedures 4.3.1 Initiating blocking . Blocking and unblocking of VPC pool 4.3
22、.2 Initiating unblocking . 4.3.3 Receiving blocking 4.3.4 Receiving unblocking 4.3.5 Abnormal procedures User Part availability procedure . 4.4.1 Inaccessible User Part . 4.4.2 Unequipped User Part . Transmission alarm handling . Automatic congestion control . B-ISUP signalling congestion control De
23、stination availability . . VPC pool Consistency Check 4.9.1 Initiating Consistency Check Request . 4.9.2 Receiving Consistency Check Request . 4.9.3 4.9.4 Receiving Consistency Check End . 4.9.5 Abnormal procedures Primitive contents . Compatibility, application process functions . Initiating Consis
24、tency Check End . Intenvorking . Interworking with nodes not supporting this feature Interworking with ISUP . Recommendation 4.2766.1 (0998) Page 15 15 15 16 17 17 17 17 17 18 19 19 20 20 20 20 20 21 21 21 21 22 22 22 22 22 23 23 23 23 24 24 24 24 24 24 6.3 Interworking with DSS 2 Interaction . Inte
25、raction with other capabilities 7.1.1 Point-to-multipoint 7.1.2 Traffic parameters . 7.1.3 Look-ahead 7.1.4 Negotiation of traffic characteristics during call set-up 7.1.5 Modification of traffic characteristics during the active phase of the call 7.1.6 7.1.7 Call priority . 7.1.8 Network generated
26、session ID . 7.1.9 Frame relay Appendix I - Guidelines for the management of VPCI and bandwidth 1.1 1.2 7 7.1 ATM End System Address Management of VPCI and bandwidth Configuration of VP cross-connect Appendix II - VPCIs, VPIs, bandwidth pools and interfaces possible relationships II . 1 Default mech
27、anism . Page 24 25 25 25 25 25 25 25 25 25 25 25 25 25 26 27 27 Recommendation 4.2766.1 (0998) V - Recommendation Q.2766.1 SWITCHED VIRTUAL PATH CAPABILITY (Geneva, 1998) 1 Overview 1.1 Scope This Recommendation specifies extensions to the Broadband ISDN User Part protocol to support Switched Virtua
28、l Path (SVP) service in a point-to-point configuration. This Recommendation allows for the use of parameters already specified by Recommendations 4.2761 to 4.2764 for the B-ISDN basic call at the “I, in order to support the Switched Virtual Path capability. It defines: - parameter coding needed; - -
29、 enhancements to the application process procedures; and enhancements to the maintenance control, application process functions. 1.2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendat
30、ion. At the time of publication, the editions indicated 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 referenc
31、es listed below. A list of the currently valid ITU-T Recommendations is regularly published. ITU-T Recommendation 1.6 1 O (1 993), B-ISDN operation and maintenance principles and functions. ITU-T Recommendation 4.2610 (1995), Usage of cause and location in B-ISDN user part and DSS 2. ITU-T Recommend
32、ation 4.2650 (1995), Interworking between Signalling System No. 7 Broadband ISDN User Part (B-ISUP) and Digital Subscriber Signalling System No. 2 (DSS 2). ITU-T Recommendation 4.2723.1 (1996), B-ISDN user part - Support of additional trafic parameters for sustainable cell rate and qualiy of service
33、. ITU-T Recommendation 4.2723.3 (1997), Extensions to the B-ISDN user part - Signalling capabilities to support trafic parameters for the Available Bit Rate (ABR) ATM transfer capability. ITU-T Recommendation 4.2723.4 (1 997), Extensions to the B-ISDN user part - Signalling capabilities to support t
34、rafic parameters for the ATM Block Transfer ATM transfer capab il ity. ITU-T Recommendation 4.2723.6 (1998), Extensions to the Signalling System No. 7 B-ISDN user part (B-ISUP) - Signalling capabilities to support the Indication of the Statistical Bit Rate Configuration 2 (SBR 2) and 3 (SBR 3) ATMtr
35、ansfer capabilities. Recommendation Q.2766.1 (05/98) 1 ITU-T Recommendation 4.2724.1 (1 996), B-ISDN user part - Look-ahead without state change for the network node interface. ITU-T Recommendation 4.2725.1 (1 996), B-ISDN user part - Support of negotiation during connection setup. ITU-T Recommendat
36、ion 4.2725.2 (1 996), B-ISDN user part - ModiJication procedures. ITU-T Recommendation Q.2725.3 (1997), Extensions to the B-ISDN user part - ModiJication procedures for sustainable cell rate parameters. ITU-T Recommendation Q.2725.4 (1998), Extensions to the Signalling Sstem No. 7 B-ISDN user part -
37、 ModiJication procedures with negotiation. ITU-T Recommendation Q.2726.1 (1 996), B-ISDN user part - ATM end system address. ITU-T Recommendation 4.2726.2 (1 996), B-ISDN user part - Call priori ITU-T Recommendation Q.2726.3 (1996), B-ISDN user part - Network generated session identifier. ITU-T Reco
38、mmendation Q.2762 (1 999, General functions of messages and signals of the B-ISDN User Part (B-ISUP) of Signalling System No. 7. ITU-T Recommendation Q.2763 (1995), Signalling System No. 7 B-ISDN user part (B-ISUP) -Format and codes. ITU-T Recommendation 4.2764 (1 995), Signalling System No. 7 B-ISD
39、N user part (B-ISUP) - Basic call procedures. ITU-T Recommendation 4.2934 (1 998), Digital Subscriber Signalling System No. 2 - Switched virtual path capability. Abbreviations This Recommendation uses the following abbreviations: AEI Application Entity Instance QOS Quality of Service SVP Switched Vi
40、rtual Path VPC Virtual Path Connection VPCI Virtual Path Connection Identifier 2 B-ISDN User Part messages and parameters 2.1 Messages In general, the message types defined in Recommendation 4.2763 are used to support SVP call/connection control. The following messages are not used for the SVP capab
41、ility, but are passed without treatment if received. Forward Transfer message (FOT); Suspend; Resume. 2 Recommendation Q.2766.1 (05/98) 2.2 Parameters and parameter subfields In general, the parameters and parameter subfields defined in Recommendation 4.2763 are used to support SVP calkonnection con
42、trol. The following parameters and parameter subfields are affected in B-ISUP. 2.2.1 Broadband bearer capability The format of the Broadband bearer capability parameter defined in Recommendation Q.2763 is modified as shown in Recommendation Q.2934. The coding of subfields for SVP service is defined
43、in the Broadband bearer capability information element in Recommendation Q.2934. NOTE - A new codepoint is added to the bearer class field for SVP service. 2.2.2 Connection element identifier As specified in Recommendation Q.2763, the octets 3 and 4 of the Connection element identifier parameter fie
44、ld shall be omitted. 2.2.3 OAM traffic descriptor The format of the OAM traffic descriptor parameter defined in Recommendation Q.2763 is modified as shown in Recommendation 4.2934. The coding of subfields for SVP service is defined in the OAM traffic descriptor information element in Recommendation
45、Q. 2934. 2.2.4 Resource identifier Coding “O 1 O - CEI: VPCINCI“ in Resource indicator subfield is not supported. Note 2 to Figure 47/Q.2763 is not required. Coding “100 - VPC Pool: VPCI“. A new codepoint in the Resource indicator subfield for SVP service. The following parameters and parameter subf
46、ields defined in Recommendation 4.2763 are not used for the SVP capability, but are passed without treatment if received. o AAL parameters; o Backward narrow-band intenvorking indicator; o Broadband high layer information; o Broadband low layer information; o Echo control information; o Forward narr
47、ow-band intenvorking indicator; 0 In-band information indicator; o Narrow-band bearer capability; o Narrow-band high layer compatibility; e Narrow-band low layer compatibility; o Progress indicator. Recommendation 4.2766.1 (0998) 3 STD.ITU-T RECMN Q-27bb-l-ENGL L998 m Lib2591 b53Lib T7L Il 3 Call co
48、ntrol, appIcation process functions 3.1 Introduction 3.1.1 The one side selection of bandwidth and VPCI values, which allows one exchange to be assigning exchange for both outgoing and incoming call/connections, on a VPCI basis, is adopted to prevent dual seizure completely. Assignment procedure of
49、VPCI and bandwidth 3.1.1.1 Before a route between two exchanges can be put into service, the following is necessary: Management of VPCI value and bandwidth of each VPC pool o the VPCIs to be used must be assigned unambiguously and identically at both exchanges; VPC pools must be defined on a physical interface basis identically at both exchanges; each VPC pool consists of a continuous range of VPCIs; a bandwidth pool must be allocated to each VPC pool identically at both exchanges; for every VPC pool it must be defined which exchange controls this VPC pool, i.e. wh
