1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000673.2002(R2012) Bearer Independent Call Control (BICC) Capability Set 1+ (CS1+) ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the info
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11、riting the American National Standards Institute. Notice of Disclaimer CBC signaling is outside the scope of this standard. Both SNs and CMNs are modeled using the “Half Call” modeling technique. Every call-processing scenario is thus divided between an incoming and an outgoing signaling procedure.
12、In the scope of this standard at least one of this procedures is the BICC procedure (see Figure 1/T1.673.1 and Figure 2/T1.673.1). 1-1 T1.673.1-2001 OutgoingproceduresIncomingproceduresBCFCall ServiceFunction (CSF)BIWFSERVING NODE (SN)Bearer Control SignallingBearer Control SignallingBearerSCOPE OF
13、THISSTANDARDCall Control Signalling(BICC protocol orother signallingsystem)Call Control Signalling(BICC protocol orother signallingsystem)Figure 1/T1.673.1 - Scope of this Standard in case of an SN 1-2 T1.673.1-2001 OutgoingproceduresIncomingproceduresBCFCall ServiceFunction (CSF)BIWFCALL MEDIATION
14、NODE (CMN)Bearer Control SignallingBearer Control SignallingBearerSCOPE OF THISSTANDARDCall Control Signalling(BICC protocol)Call Control Signalling(BICC protocol)Figure 2/T1.673.1 - Scope of this Standard in case of a CMN The BICC protocol is based on, and uses wherever applicable the same signalin
15、g procedures, information elements and message types as the ITU-T BICC protocol specified in: ITU-T Recommendation Q.1902.1 (2001), BICC protocol (CS2) functional description.1 ITU-T Recommendation Q.1902.2 (2001), BICC protocol (CS2) general functions of messages and parameters.1 ITU-T Recommendati
16、on Q.1902.3 (2001), BICC protocol (CS2) formats and codes.1 ITU-T Recommendation Q.1902.4 (2001), BICC protocol (CS2) basic call procedures.1 ITU-T Recommendation Q.1902.5 (2001), Exceptions to the Application Transport Mechanism in the context of Bearer Independent Call Control.1 ITU-T Recommendati
17、on Q.1902.6 (2001), Generic signaling procedures and support of the ISDN User Part Supplementary Services with the Bearer Independent Call Control protocol.1 ITU-T Recommendation Q.765.5 (2000) and Amendment 1 (2001), Application Transport Mechanism - Bearer Independent Call Control.11This document
18、is available from the International Telecommunications Union. 1-3 T1.673.1-2001 ITU-T Recommendation Q.1912.1 (2001), Interworking between Signaling System 7 ISDN User Part and the Bearer Independent Call Control Protocol.1 ITU-T Recommendation Q.1912.2 (2001), Interworking between selected signalin
19、g systems (PSTN access, DSS1, C5, R1, R2, TUP) and the Bearer Independent Call Control protocol.1 ITU-T Recommendation Q.1912.4 (2001), Interworking between DSS 2 and the Bearer Independent Call Control Protocol.1The BICC protocol is flexible enough and has sufficient spare capacity to accommodate a
20、ny foreseeable requirements that may be imposed by the introduction of new supplementary services and network capabilities. The BICC protocol is specified in Chapters T1.673.1 to T1.673.7 of this American National Standard. A functional description of the BICC protocol is provided in this chapter. G
21、eneral functions of messages and parameters are provided in T1.673.2. BICC formats and codes are specified in T1.673.3, while basic call signaling procedures are specified in T1.673.4. Exceptions to the Application Transport Mechanism in the context of BICC are described in T1.673.5; Chapter T1.673.
22、6 specifies the APM-user to support the transport of the bearer related information for the BICC. Performance objectives in the BICC application are provided in T1.673.7. In addition to the basic service, this issue of the BICC protocol standard also supports a number of supplementary services and n
23、etwork capabilities. The BICC protocol and procedures required to support these services and network capabilities are similar to the corresponding ISDN User Part procedures defined in other American National Standards. 2 Normative References The following listed standards contain provisions which, t
24、hrough reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibil
25、ity of applying the most recent editions of the standards indicated below. T1.113-2000, Signaling system no. 7 (SS7) Integrated Services Digital Network (ISDN) user part .2T1.607-2000, Integrated Services Digital Networks (ISDN) Layer 3 Signaling Specification for Circuit Switched Bearer Services fo
26、r Digital Subscriber Signaling System Number 1 (DSS1).2T1.609-1999, Interworking Between the ISDN User-Network Interface Protocol and the Signaling System No. 7 ISDN User Part.2T1.648-1995 (R2000), Signaling System No. 7 (SS7) - Broadband Integrated Services Digital Network User Part (B-ISUP).2T1.65
27、6-1996 (R2000), Broadband-ISDN-Interworking between Signaling System No. 7 Broadband ISDN User Part (B-ISUP) and ISDN User Part (ISUP).2T1.657-1996 (R2000), Broadband-ISDN-Interworking between Signaling System No. 7 Broadband ISDN User Part (B-ISUP) and Digital Subscriber Signaling System No. 2 (DSS
28、2).2T1.674-2002, BICC CS1+: Signaling Transport Converters (STCs).2T1.677-2001, BICC Bearer Control Tunneling Protocol.22This document is available from the Alliance for Telecommunications Industry Solutions, 1200 G Street N.W., Suite 500, Washington, DC 20005. 1-4 T1.673.1-2001 3 Definitions This s
29、tandard defines the following terms: 3.1 Backbone Network Connection (BNC): Represents the edge-to-edge transport connection within the backbone network, consisting of one or more Backbone Network Connection Links (BNCL). The Backbone Network Connection represents a segment of the end-to-end Network
30、 Bearer Connection (NBC). 3.2 Backbone Network Connection Link (BNCL): Represents the transport facility between two adjacent backbone network entities containing a bearer control function. 3.3 Bearer Control Function (BCF): Note that five types of BCFs are illustrated in the composite functional mo
31、del (Figure 3/T1.673.1): BCF-G, BCF-J, BCF-N, BCF-R and BCF-T. The Bearer Control Joint Function (BCF-J) provides the control of the bearer switching function, the communication capability with two associated call service functions (CSFs), and the signaling capability necessary to establish and rele
32、ase the backbone network connection. The Bearer Control Gateway Function (BCF-G) provides the control of the bearer switching function, the communication capability with its associated call service function (CSF-G), and the signaling capability necessary to establish and release the backbone network
33、 connection. The Bearer Control Nodal Function (BCF-N) provides the control of the bearer switching function, the communication capability with its associated CSF, and the signaling capability necessary to establish and release of the backbone network connection to its peer (BCF-N). The Bearer Contr
34、ol Relay Function (BCF-R) provides the control of the bearer switching function and relays the bearer control signaling requests to next BCF in order to complete the edge to edge backbone network connection The Bearer Control Transit Function (BCF-T) provides the control of the bearer switching func
35、tion, the communication capability with its associated call service function (CSF-T), and the signaling capability necessary to establish and release the backbone network connection. 3.4 Bearer Control Segment (BCS): Represents the signaling relationship between two adjacent Bearer Control Functiona
36、l entities (BCF). 3.5 Bearer Inter-Working Function (BIWF): A functional entity which provides bearer control functions (BCF) and media mapping/switching functions within the scope of a Serving Node (BCF-N, BCF-T or BCF-G) and one or more MCF and MMSF, and is functionally equivalent to a Media Gatew
37、ay that incorporates bearer control. 3.6 Bearer Inter-Working Node (BIWN): A physical unit incorporating functionality similar to a BIWF. 3.7 Call Control Association (CCA): Defines the peer-to-peer signaling association between Call and Call Parameters; Information elements; and Messages. Examples:
38、 Called Party Number parameter, Initial Address message. 2. The definition of a parameter value is written in italics and is put between quotation marks. Example: Nature of Address value 0000011 “national (significant) number.” 3. All message names are BICC messages unless explicitly stated otherwis
39、e. Example: The “IAM message” is the IAM message in BICC, whereas an IAM message in ISUP is referred to as an “ISUP IAM message.” 6 Architecture 6.1 Network model Figure 3/T1.673.1 shows the complete functional model of a network using the BICC protocol for call control signaling. 1-9 T1.673.1-2001
40、CallControlSignallingBearerControlSignallingSignalling Transport NetworkBCF-JBCF-RSWN-2BCF-RSWN-3CSF-NISN-BBCF-N(z)BackboneNetworkConnectionLinkBackbone NetworkConnectionsNetwork Bearer Connection (end to end)CSF-NBCF-N(v)ISN-ABearerInter-workingFunction(BIWF)Scope of SignallingRequirementsBCF-RSWN-
41、1CSF-TBCF-T(w)TSN-xCSF-GBCF-G(x)GSN-xCSF-GBCF-G(y)GSN-yCSF-CCMN-XBCF-A(a)ACN-xJoint DomainBearer Inter-workingFunction (BIWF)AccessNetworkBCF-AACN-wOtherservicesuppliernetworksOtherservicesuppliernetworksFigure 3/T1.673.1 - Network Functional model 6.2 Protocol model Figure 4/T1.673.1 shows the prot
42、ocol model adopted for this standard. SignallingTransportLayersBICC proceduresgenericinterfacecall controlprotocolbearerspecificinterfacebearer controlprotocolBearerControlMappingFunctiongenericinterfacetransportspecificinterfaceSignallingTransportConverterFigure 4/T1.673.1 - Protocol model 1-10 T1.
43、673.1-2001 The protocol aspects of the functional model in Figure 3/T1.673.1 are provided by the elements of the protocol model in Figure 4/T1.673.1. The BICC procedures block includes the functions of the CSF element in the functional model. The protocol functions of the BCF element of the function
44、al model are distributed between the Mapping Function, and Bearer Control blocks in Figure 4/T1.673.1. The other functions included in the BCF element (e.g., control of switching functions) are not shown in Figure 4/T1.673.1. Where the BICC description refers to sending/receiving bearer signaling ev
45、ents to/from the BCF, this relates to use of the generic interface to the mapping function block in Figure 4/T1.673.1. Where the BICC description refers to sending/receiving BICC messages, this relates to the use of the generic interface to the Signaling Transport Converter, see T1.674-2002. 6.3 Doc
46、ument structure This chapter provides a functional description of the BICC protocol, independent of the bearer technology employed. This is the block labeled BICC procedures in Figure 4/T1.673.1. It also uses the generic interface to the blocks labeled Mapping Functions and Signaling Transport Conve
47、rter. The blocks in Figure 4/T1.673.1 labeled Mapping Function are defined in additional publications3that are to be provided for each bearer technology to describe specific adaptation for that technology. The blocks in Figure 4/T1.673.1 labeled Signaling Transport Converter are defined in T1.674-20
48、02, which describes the general and transport specific issues relating to the signaling transport service. 7 Introduction to BICC protocol signaling procedures 7.1 Address signaling In general, the call set-up procedure described is standard for both speech and non-speech applications using en bloc
49、address signaling. 7.2 Basic procedures The basic call control procedure is divided into three phases: call set-up, the data/conversation phase, and call cleardown. Messages on the signaling link are used to establish and terminate the different phases of a call. Standard in-band supervisory tones and/or recorded announcements are returned to the caller on appropriate connection types to provide information on call progress. Calls originating from ISDN terminals may be supplied with more detailed call progress information by means of additional
