1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TE LEC0 M MU N I CAT I ON STAN DARD IZATIO N SECTOR OF ITU Series Q Supplement 23 (1 2/1999) SERIES Q: SWITCHING AND SIGNALLING Supplement to ITU-T Q.1901 Recommendation - Technical Report TRQ.301 O: Operation of the bearer independent call control (BICC)
2、protocol with AAL type 2 signalling protocol (CS-I) ITU-T Q-series Recommendations - Supplement 23 (Formerly CCITT Recommendations) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFIC
3、ATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No.
4、 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1-Q.3 Q.4-Q. 5 9 Q.60-Q.99 Q. 100-Q. 119 Q.
5、 120-Q.249 Q. 250-Q.3 09 Q.310-Q.399 Q.400-Q.499 Q. 500-Q. 5 99 Q.600-Q.699 Q.700-Q.849 Q. 8 50-Q. 999 Q. 1000-Q. 1099 Q.1100-Q.1199 Q. 1200-Q.1699 Q. 1700-Q.1799 Q.2000-Q.2999 For further details, please refer to the list of ITU-T Recommendations. Supplement 23 to ITU-T Q-series Recommendations Sup
6、plement to ITU-T Q.1901 Recommendation - Technical Report TRQ.3010: Operation of the bearer independent call control (BICC) protocol with AAL type 2 signalling protocol (CS-1) Summary This Supplement to ITU-T Recommendation Q. 190 1 describes the general aspects of the operation of the Bearer Indepe
7、ndent Call Control (BICC) protocol with AAL type 2 signalling protocol, Capability Set 1 (CS-l), used to control AAL type 2 Bearer Connections. Source Supplement 23 to ITU-T Q-series Recommendations was prepared by ITU-T Study Group 11 (1 997-2000) and approved under the WTSC Resolution 5 procedure
8、on 3 December 1999. Q series - Supplement 23 (12/1999) i FOREWORD The International Telecommunication Union (ITU) 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 responsible fo
9、r 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 the topics for study by the ITU-T st
10、udy groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basi
11、s with IS0 and IEC. NOTE In this publication, 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 implementation of this
12、 publication 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 publication development process. As of the date of app
13、roval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB paten
14、t 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 the ITU. 11 Q series - Supplement 23 (12/1999) CONTENTS Page 1 2 3 4 5
15、 5.1 5.2 5.3 5.4 Scope . References . Definitions Abbreviations Information exchanged between BICC and AAL type 2 Signalling Entities Channel Attributes 5.1.1 Codec Information . 5.1.2 Transmission Medium Requirements Addressing Binding Information Cause . Q series . Supplement 23 (12/1999) 1 2 3 3
16、. 111 Supplement 23 to ITU-T Q-series Recommendations Supplement to ITU-T Q.1901 Recommendation - Technical Report TRQ.3010: Operation of the bearer independent call control (BICC) protocol with AAL type 2 signalling protocol (CS-1) (Geneva, 1999) 1 Scope This Supplement contains information relevan
17、t to the operation of the Bearer Independent Call Control (BICC) Protocol 6, 7, with the AAL type 2 Signalling Protocol, Capability Set 1 (CS-1) SI, making use of the AAL type 2 connection signalling model, contained in ITU-T Supplement 8, Technical Report TRQ.2400 9. Information which is relevant t
18、o be exchanged between the BICC signalling entity and the AAL type 2 Signalling entity is identified. The dashed box of Figure 1-1 shows the scope of this Supplement. Information passed between two peer BICC 6, 7 signalling entities is a result of the logic within the BICC 6, 7 signalling entity. In
19、terfaces to Layer Management are outside the scope of this Supplement. NOTE - The handling of re-use of idle bearer connections is outside the scope of the present Supplement. TI 11 11 170-00 Figure 1-1 - Scope of this Supplement Q series - Supplement 23 (12/1999) 1 2 References The following Techni
20、cal Reports and other references contain provisions which, through reference in this text, constitute provisions of this Supplement. At the time of publication, the editions indicated were valid. All supplements and other references are subject to revision; all users of this Supplement are therefore
21、 encouraged to investigate the possibility of applying the most recent edition of the supplements and other references listed below. A list of the currently valid ITU-T Recommendations and supplements is regularly published. ITU-T Recommendation 1.363.2 (1 997), B-ISDN ATM Adaptation layer specifica
22、tion: Type 2 AAL. ITU-T Recommendation 1.366.1 (1 998), Segmentation and reassembly service specific convergence sublayer for the AAL Type 2. ITU-T Recommendation 1.366.2 (1999), AAL type 2 service specific convergence sublayer for trunking. ITU-T Recommendation X.200 (1 994), Information technology
23、 - Open System Interconnection - Basic Reference Model. ITU-T Recommendation X.2 1 O (1 993), Information technology - Open System Interconnection - Basic Reference Model: Conventions for the Definition of OSI Services. ITU-T Recommendation Q.765.5 (2000), Signalling System No. 7 - Application trans
24、port mechanism: Bearer Independent Call Control (BICC). ITU-T Recommendation Q. 190 1 (2000), Bearer Independent Call Control. ITU-T Recommendation Q.2630.1 (1999), AAL type 2 Signalling Protocol (Capability Set 1). ITU-T Q-series Recommendations - Supplement 8 (1 999), Technical Report TRQ.2400: Tr
25、ansport control signalling requirements - Signalling requirements for AAL Type 2 link control capability set 1. ITU-T Recommendation G.711 (19SS), Pulse Code Modulation (PCM) of voice frequencies. ITU-T Recommendation G.722 (1988), 7 kHz audio-coding within 64 kbith. ITU-T Recommendation G.723.1 (1
26、996), Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbith. ITU-T Recommendation G.726 (1990), 40, 32, 24, 16 kbith Adaptive Differential Pulse Code Modulation (ADPCM). ITU-T Recommendation G.727 (1990), 5-, 4-, 3- and 2-bits sample embedded Adaptive Differential Pu
27、lse Code Modulation (ADPCM). ITU-T Recommendation G.728 (1 992), Coding of speech at 16 kbith using low-delay code excited linear prediction. ITU-T Recommendation G.729 (1996), Coding of speech at 8 kbith using conjugate- structure algebraic-code-excited linear-prediction. ITU-T Recommendation H.221
28、 (1999), Frame structure for a 64 to 1920 kbith channel in audiovisual teleservices. ITU-T Recommendation Q.763 (1997), Signalling System No. 7 - ISDN userpart format and codes. ITU-T Recommendation Q.850 (1998), Usage of cause and location in the Digital Subscriber Signalling System No. 1 and the S
29、ignalling System No. 7 ISDN User Part. Q series - Supplement 23 (12/1999) 20 21 ITU-T Recommendation Q.26 1 O (1 999), Usage of cause and location in B-ISDN User Part and DSS2. ITU-T Recommendation 1.366.3, AAL type 2 Service Specific Convergence Sublayer for Mobile. 3 Definitions No definitions are
30、 introduced for the purpose of this Supplement. 4 Abbreviations This Supplement uses the following abbreviations: A2EA AAL ATM Adaptation Layer ALC Link Characteristics ATM Asynchronous Transfer Mode BCF Bearer Control Function BICC Bearer Independent Call Control CID Channel Identifier CPS Common P
31、art Sublayer cs-1 Capability Set 1 CSF Call Server Function DCME Digital Circuit Multiplication Equipment PDU Protocol Data Unit SAP Service Access Point SSIA Service Specific Information (Audio) SSIM Service Specific Information (Multirate) SUGR Served User Generated Reference AAL type 2 Service En
32、dpoint Address 5 It is assumed that the format of information passed between the BICC 6, 7 entity and the AAL type 2 Served User Converter is the same as the format of information passed between two peer BICC 6, 7 entities. No primitives are defined for this interface. The primitives passed between
33、the AAL type 2 Signalling SI entity and the AAL type 2 Served User SI are defined in Recommendation Q.2630.1 SI. The following subclauses list the information passed between the BICC 6, 7 and AAL type 2 SI Signalling Entities. The relevant information relates to: 1) Channel Attributes; 2) Addressing
34、 ; 3) Binding Information; and 4) Cause. Information exchanged between BICC and AAL type 2 Signalling Entities Q series - Supplement 23 (12/1999) 3 In the following tables, the relationship and appropriate conversion of information between the BICC 6, 7 and AAL type 2 SI Signalling Entities is perfo
35、rmed by the AAL type 2 Served User 81 Converter. Codec Information (Note), or Transmission Medium Requirements (Note) 5.1 Channel Attributes Table 5-1 identifies the Channel Attributes related information passed from the BICC entity to the AAL type 2 Signalling entity, which are applicable to derive
36、 the AAL type 2 signalling parameters needed to control the establishment of the AAL type 2 link. Link Characteristics (ALC), andor Service Specific Information (SSIA, SSIM) Table 5-1 - Mapping of Channel Attributes I BICC Signalling Entity 6 and 7 I AAL type 2 Signalling Entity SI I NOTE - Codec In
37、formation is used if present, otherwise the Transmission Medium Requirements are used. 5.1.1 Codec Information Table 5-2 identifies the Codec type information passed from the BICC entity to the AAL type 2 Signalling entity which are applicable to derive the AAL type 2 link characteristics needed to
38、control the establishment of the AAL type 2 bearer. Table 5-2 - Mapping of Codec Type to Link Characteristics AAL type 2 Signalling Entity SI Link Characteristics BICC Signalling Entity 6 and 7 Codec Type Maximum Bit Rate (kbith) CPS-SDU Average Maximum CPS-SDU Bit Rate (kbith) CPS-SDU Size (octets)
39、 Average CPS-SDU Size (octets) As maximum -TiT 8, 16,24, 32,40 G.7 1 1 64 kbit/s A-law 64 G.711 64 kbit/s y-law 64 8, 16,24, 32,40 64 I (Note21 As maximum G.7 1 UH.22 1 56 kbit/s A-law 56 7, 14, 21, 28, 35 56 I mote21 As maximum G.7 1 UH.22 1 56 kbit/s y-law 56 7, 14, 21, 28, 35 56 I (Note21 As maxi
40、mum G.7 1 UH.22 1 48 kbit/s A-law 48 6, 12, 18, 24, 30 48 I (Note21 As maximum G.7 1 UH.22 1 48 kbit/s y-law 48 6, 12, 18, 24, 30 48 I mote21 As maximum G.722 (Note 3) 64 8, 16, 24, 32,40 64 I mote21 As maximum 6.3 20-24 G.723.1 (Note 4) G.723.1 Annex A (Silence suppression) (Notes 4 and 5) 5.3-6.3
41、2.8-3.2 6.3 20-24 4 Q series - Supplement 23 (12/1999) Table 5-2 - Mapping of Codec Type to Link Characteristics (concluded) Maximum CPS-SDU Bit Rate (kbith) BICC Signalling Entity 6 and 7 Codec Type Average CPS-SDU CPS-SDU Size CPS-SDU Size Bit Rate (kbith) Max i m u m Average (octets) (octets) G.7
42、26 (Note 6) 4, 8, 12, 16,20 40 I G.727 (Note 6) As maximum G.728 (Note 7) 32 4, 8, 12, 16,20 40 I G.729 (Note 8) As maximum G.729 Annex B (Silence suppression) (Notes 5 and 8) 16 11.8 AAL type 2 Signalling Entity SI Link Characteristics 40 5, 10, 15, 20, 25 (Note 2) (Note 2) 5, 10, 15,20 Asmaximum 1
43、6 8 10,20 (Note 2) As maximum 11.8 11.8 15, 30 (Note 2) 4 10,20 (Note 2) As maximum 5.9 15, 30 (Note 2) I 40 I 5, 19, 15,29,25 I (Note 2) NOTE 1 - The values indicated do not include framing protocol overheads. NOTE 2 - The value used for CPS-SDU packet sizes are network dependent. It is worth notin
44、g that a greater CPS-SDU packet size results in a lower overheads but greater delay, while a lower CPS-SDU packet size results in less delay but greater overheads. NOTE 3 - Codec can change rate after every sample. NOTE 4 - Codec can change rate from 5.3 to 6.3 kbit/s, every 30 ms frame. NOTE 5 - 50
45、% silence assumed. NOTE 6 - Codec may change rates between 16,24,32 and 40 kbit/s. 16 and 24 kbit/s are only used when in overload. 32 kbit/s is the normal rate for voice, 40 kbit/s is used for data. NOTE 7 - Codec may change rates between 9.6, 12.8 and 16 kbit/s. 9.6 and 12.8 kbit/s are only used w
46、hen in overload. 16 kbit/s is the normal rate for use. NOTE 8 - Codec may change rates between 6.4, 8 and 11.8 kbit/s. 8 kbit/s is used for normal quality, 11.8 kbit/s for higher quality and 6.4 kbit/s is used for DCME overload. Table 5-3 identifies the Codec type information passed from the BICC en
47、tity to the AAL type 2 Signalling entity which are applicable to derive the AAL type 2 Signalling Service Specific Information which may be used to control the establishment of the AAL type 2 bearer. Q series - Supplement 23 (12/1999) 5 Table 5-3 - Mapping of Codec Type to Service Specific Informati
48、on BICC Signalling Entity 6 and 7 Transmission Medium Requirements 191 64 kbit/s unrestricted AAL type 2 Signalling Entity SI Service Specific Information SI BICC Signalling Entity 6 and 7 Codec Type AAL type 2 Signalling Entity SI Link Characteristics (Note 1) Maximum CPS- Average CPS- Maximum Aver
49、age SDU Bit Rate SDU Bit Rate CPS-SDU Size CPS-SDU Size (kbith) (kbith) (octets) (octets) 64 64 8, 16, 24, 32,40 As maximum (Note 2) Value 8, 16,24, 32,40 I Refer to 1.366.3 22 I ITU-T profile I 1 255 I As maximum NOTE - The BCF logic entity by examining the Codec Type determines the ITU-T Profile to be used for the AAL type 2 Bearer connection. 1536 1920 Multirate (64 kbit/s base rate) ln31 5.1.2 Transmission Medium Requirements Table 5-4 identifies the Transmission Requirements information passed from the BICC entity to
