1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 1 TELECOMMUNICATION (03/93)STANDARDIZATION SECTOROF ITU%.%2!,G0G02%#/-%.$!4)/.3G0G0/.G0G04%,%0(/.%37)4#().G0G0!.$G0G03).!,).modified at Helsinki, 1993)1 User-to-User Signalling (UUS)1.1 ScopeThis Recommendation defines the Stage 2 of the Integrated Servic
2、es Digital Network (ISDN) as provided by thetelecommunications operators for the User-to-User Signalling (UUS) supplementary services. Stage 2 identifies thefunctional capabilities and the information flows needed to support the service description. The Stage 2 description alsoidentifies user operat
3、ions not directly associated with a call (see Recommendation I.130 1).This Recommendation is defined according to the methodology specified in Recommendation Q.65 2.This Recommendation does not formally describe the relationship between these supplementary services and the basiccall but, where possi
4、ble this information is included for guidance.In addition this Recommendation does not specify the requirements where the service is provided to the user via aprivate ISDN. This Recommendation does not specify the requirements for the allocation of defined functional entitieswithin a private ISDN; i
5、t does, however, define which functional entities may be allocated to a private ISDN.This Recommendation does not specify the additional requirements where the service is provided to the user via aTelecommunications network that is not an ISDN.The UUS supplementary service allows an ISDN user to sen
6、d/receive a limited amount of information to/from anotherISDN user over the signalling channel in association with a call to the other ISDN user.NOTE These procedures are applicable to user-to-user information (UUI) transfer in association with a circuit-switchedtelecommunication service only. Proce
7、dures to permit UUI transfer in association with other types of calls (e.g. packet bearer service)need to be investigated.The UUS supplementary services are applicable to all telecommunication services.This Recommendation is applicable to the Stage 3 Recommendation for the ISDN UUS supplementary ser
8、vices, asdefined in Recommendation I.130 1.1.2 ReferencesThese references are cited at the appropriate places in the text and the publications are listed hereafter. Dated references,subsequent amendments to, or revisions of any of these publications apply to this Recommendation only whenincorporated
9、 in it by amendment or revision. For undated references the latest edition of the publication referred toapplies.1 CCITT Recommendation Method for the characterization of telecommunication services supported by an ISDNand network capabilities of an ISDN, Rec. I.130, 1988.2 CCITT Recommendation Stage
10、 2 of the method for the characterization of services supported by an ISDN, Rec.Q.65, 1988.3 CCITT Recommendation Integrated Services Digital Network (ISDN); User-to-User Signalling (UUS)supplementary service; Service description, Rec. I.257.1.2 Recommendation Q.87 (03/93)4 CCITT Recommendation Inte
11、grated Services Digital Network (ISDN); Basic call handling for Circuit SwitchedBearer Services; Functional capabilities and information flows, Rec. Q.71, 1972.5 CCITT Recommendation Vocabulary of terms for ISDNs, Rec. I.112, 1988.6 CCITT Recommendation Principles of telecommunication services suppo
12、rted by an ISDN and the means todescribe them, Rec. I.210, 1988.1.3 DefinitionsFor the purpose of this Recommendation, the following definitions apply:Integrated Services Digital Network (ISDN): see 2.3/I.112 definition 308 5.Service: telecommunication service: see 2.2/I.112 definition 201 5.Supplem
13、entary service: see 2.4/I.210 6.1.4 Symbols and abbreviationsFor the purpose of this Recommendation, the following abbreviations are used:CC Call ControlCCA Call Control AgentFE Functional EntityFEA Functional Entity ActionISDN Integrated Services Digital NetworkLE Local Exchangenp Not Providedp Pro
14、videdPNX Private Network Exchangere Requested and Essentialrne Requested but Not EssentialUUS1 User-to-User Signalling Service 1UUS2 User-to-User Signalling Service 2UUS3 User-to-User Signalling Service 3TE Terminal EquipmentUUI User-to-User InformationUUM User-to-User MessageUUS User-to-User Signal
15、ling1.5 DescriptionThe general description of the UUS supplementary service is specified in Recommendation I.257.1 3.1.6 Derivation of the functional model1.6.1 Functional model descriptionThe model for the UUS supplementary service is shown in Figure 1-1.Recommendation Q.87 (03/93) 3FE1 FE2 FE3 FE4
16、 FE5T1135430-91/d01rarbrcdrFIGURE 1-1/Q.87Functional modelFIGURE 1-1/Q.87.D01 = 3.5 CM1.6.2 Description of the functional entitiesThe functional entities required by the UUS supplementary services in addition to those of the basic call as follows:1.6.2.1 FE1FE1 is the functional entity that serves t
17、he user and is responsible for initiating functional requests and interacting withnetwork.1.6.2.2 FE2FE2 is the functional entity within the network that cooperate with their peers to provide the services requested by FE1and FE5.1.6.2.3 FE3FE3 is the functional entity within the network that coopera
18、te with their peers to provide the services requested by FE1and FE5.1.6.2.4 FE4FE4 is the functional entity within the network that cooperate with their peers to provide the services requested by FE1and FE5.1.6.2.5 FE5FE5 is the functional entity that serves the user and is responsible for initiatin
19、g functional requests and interacting withnetwork.1.6.3 Relationship with a basic serviceThe relationship with a basic service is shown in Figure 1-2. The model for basic call handling is defined inRecommendation Q.71 4.Service 1 is carried across the network as part of Basic service. Services 2 and
20、 3 allow additional messages to beaccepted and processed from specific states in the basic service model. These messages do not alter the state but requirean action to take place.1.6.3.1 Description of the call control agent functional entityThe CCA functional entity supports the functionality to:a)
21、 access the service-providing capabilities of the CC entities, using service requests to establish, manipulateand release a single call;b) receive indications relating to the call from the CC entity and relay them to the user;c) maintain call state information as perceived from this functional end-p
22、oint of the service (i.e. a single-ended view of the call).4 Recommendation Q.87 (03/93)FE1 FE2 FE4CCA CC CC CC CCAFE3 FE5T1135440-91d02BasiccallFIGURE 1-2/Q.87Relationship of UUS with a basic servicerar1rbr2r2rcdr1FIGURE 1-2/Q.87.D02 = 4.5 CM1.6.3.2 Description of the call control (CC) functional e
23、ntityThe CC functional entity supports the functionality to:a) establish, manipulate and release a single call (upon request of the CCA entity);b) associate and relate the CCA entities that are involved in a particular call and/or service;c) manage the relationship between the CCA entities involved
24、in a call (i.e. reconcile and maintain theoverall perspective of the call and/or service).1.7 Information flows1.7.1 Information flow diagramsInformation flow diagrams for User-to-User Signalling service call setup, service usage and call release are shown inFigures 1-3 to 1-11. Figure 1-3 shows a s
25、uccessful use of UUS Service 1 in a point-to-point configuration; Figure 1-4 shows a successful use of UUS Service 1 in a point-to-multipoint configuration; Figure 1-5 shows a successful and an unsuccessful use of UUS Service 2 in a point-to-pointconfiguration; Figure 1-6 shows an unsuccessful use o
26、f UUS Service 2 in a point-to-multipoint configuration; Figure 1-7 shows a successful and an unsuccessful use of UUS Service 3 request and essential; Figure 1-8 shows a successful and an unsuccessful use of UUS Service 3 requested but not essential; Figure 1-9 shows a successful and an unsuccessful
27、use of UUS Service 3 requested during the activephase by the calling party; Figure 1-10 shows a successful and an unsuccessful use of UUS Service 3 requested during the activephase by the called party; Figure 1-11 shows a UUS service requested in a point-to-multipoint configuration.Recommendation Q.
28、87 (03/93) 5921911922FE1 FE2 FE3 FE4931932FE592393394194294395195294494594693692492592691291391492A92B92C93A93B93C94A94B94C954T1135450-91/d03937938939949953927928929rarbrcdr934935947948SETUP211req. ind.NOTE 1 INFORM 1-4req. inds. includeS1=re., UUI.REPORT(alerting)resp. conf.SETUP311 321resp. conf.S
29、ETUPreq. ind.221 231NOTE 2 INFORM 1-4resp. confs. includeS1=p , UUI.a)REPORT(alerting)resp. conf.224SETUPreq. ind.RELEASE321 331resp. conf.SETUP231 241req. ind.REPORT(alerting)resp. conf.SETUP244245req. ind.RELEASE331 341req. ind.RELEASEresp. conf.SETUP241 251244 251resp. conf.SETUPreq. ind.NOTE 3 I
30、NFORM 5-8req. inds. includeUUI.341 351DISCONNECTresp. conf.Requested and essentialProvidedNOTE Although not shown in this figure, the calling user is allowed to request Service 1 as not essential (i.e. rne.).FIGURE 1-3/Q.87UUS Service 1 - Successful caseCalled user is point-to-pointThis indication m
31、ay be included in INFORM 8 req. ind. (with SETUP resp. conf.).a)re.p.req. ind.INFORM 1req. ind.INFORM 2req. ind.INFORM 3req. ind.INFORM 4req. ind.REPORT(alerting) req. ind.INFORM 4req. ind.INFORM 3resp. conf.INFORM 12req. ind.INFORM 2req. ind.INFORM 1resp. conf.INFORM 9req. ind.DISCONNECTreq. ind.IN
32、FORM 5req. ind.RELEASEreq. ind.RELEASEresp. conf.INFORM 10req. ind.INFORM 6req. ind.RELEASEresp. conf.INFORM 11req. ind.INFORM 7req. ind.INFORM 8req. ind.RELEASEreq. ind.RELEASEFIGURE 1-3/Q.87.D03 = 20 CM PAGE PLEINE6 Recommendation Q.87 (03/93)921911922FE1 FE2 FE3 FE4931932923933941942943951 951FE5
33、(A)947948953953952944945946952944945934935936924925926912T1135460-91/d04FE5(B)rarb rc drdrSETUP211NOTE 1 INFORM 1-4req. inds. includeS1=re., UUI.REPORT(alerting)SETUPSETUPreq. ind.221 231REPORT(alerting)req. ind.244SETUPSETUP231 241req. ind.REPORT(alerting)SETUP245resp. conf.SETUP241 251req. ind.NOT
34、E 4 INFORM 4resp. conf. fromFE5(A) includesS1=p., UUI .In the case of point-to-multipoint configuration, INFORM 8 (include UUI, UUI) and INFORM 4 (include UUI) from the not-selected FE5(A) are discarded at FE4.a)NOTE Potential contention causes that UUI cannot be held in the REPORT.FIGURE 1-4/Q.87UU
35、S Service 1Called user is point-to-multipoint221resp. conf.req. ind.resp. conf.req. ind.NOTE 2 INFORM 8req. inds. includesUUI from FE5(A),UUI from FE5(B).a)a)245SETUPresp. conf.RELEASEa)251SETUPreq. ind.req. ind.SETUPresp. conf.NOTE 3 INFORM 1-4resp. confs. includeS1=p., UUI.ACKreq. ind.req. ind.INF
36、ORM 3req. ind.INFORM 2req. ind.INFORM 1resp. conf.INFORM 1resp. conf.INFORM 2resp. conf.INFORM 3resp. conf.INFORM 4resp. conf.INFORM 4req. ind.INFORM 4req. ind.REPORT(alerting) req. ind.INFORM 8req. ind.INFORM 4req. ind.REPORT(alerting) req. ind.INFORM 8FIGURE 1-4/Q.87.D04 = 17 CMRecommendation Q.87
37、 (03/93) 7921911922FE1 FE2 FE3 FE4 FE592393394194294395195294494594691291492C93A93B93C94A94B94C954913937938947948949953T1135470-91/d0593493593692A92B924925926939927928929931932rarbrcdrSETUP211req. ind.NOTE 1 INFORM 1-4req. inds. includeS2=re.REPORT(alerting)req. ind.SETUPreq. ind.231REPORT(alerting)
38、resp. conf.req. ind.SETUP231 241req. ind.REPORT(alerting)resp. conf.244req. ind.req. ind.resp. conf.SETUP241 251244resp. conf.req. ind.re.p.FIGURE 1-5/Q.87 (sheet 1 of 2)UUS Service 2Called user is point-to-point221225req. ind.INFORM 9SETUPresp. conf.Case 1: Service 2 providedINFORM 6INFORM 10req. i
39、nd.224SETUPresp. conf.INFORM 7INFORM 11SETUP245NOTE 2 INFORM 1-4resp. confs. includeS2=p.INFORM 8INFORM 12req. ind.SETUPresp. conf.req. ind.INFORM 1req. ind.INFORM 2req. ind.INFORM 3req. ind.INFORM 4req. ind.REPORT(alerting) req. ind.INFORM 4req. ind.INFORM 3req. ind.INFORM 2req. ind.INFORM 1resp. c
40、onf.INFORM 5Requested and essentialProvided224225FIGURE 1-5/Q.87.D05 = 20 CM PAGE PLEINE8 Recommendation Q.87 (03/93)921911922FE1FE2FE3FE4931932FE5923933941942943951952944945946912T1135480-91/d06924925926934935936rarbrcdrSETUP211req. ind.NOTE 1 INFORM 1-4req. inds. includeS2=rne.REPORT(alerting)SETU
41、Preq. ind.231REPORT(alerting)resp. conf.SETUP241req. ind.REPORT(alerting)244251resp. conf.Requested but not essentialNot providedFIGURE 1-5/Q.87 (sheet 2 of 2)UUS Service 2Called user is point-to-point221225resp. conf.Case 2: Service 2 not providedNOTE 2 INFORM 1-4resp. confs. includeS2=np.SETUP224r
42、esp. conf.231221225resp. conf.SETUP224resp. conf.245SETUPresp. conf.241SETUP244245SETUPresp. conf.req. ind.INFORM 1req. ind.INFORM 2req. ind.INFORM 3req. ind.INFORM 4req. ind.REPORT(alerting) req. ind.INFORM 4req. ind.INFORM 3req. ind.INFORM 2req. ind.INFORM 1rne.np.FIGURE 1-5/Q.87.D06 = 18 CMRecomm
43、endation Q.87 (03/93) 9921911922FE1 FE2 FE3 FE4923933FE5(A)FE5(B)946934935936926912921911922932923933943951 951946934935936926912931932941942924925941942945924925T1135490-91/d07931rarbrcdrdrSETUP211req. ind.NOTE 2 INFORM 1-3req. inds. includeS2=re.SETUPreq. ind.221 231req. ind.SETUP231SETUP241req. i
44、nd.SETUPFIGURE 1-6/Q.87UUS Service 2Called user is point-to-multipoint221411 421DISCONNECTresp. conf.211 221SETUPreq. ind.NOTE 4 INFORM 1-4req. inds. includeS2=rne.REPORT(alerting)resp. conf.SETUPresp. conf.421 431RELEASEresp. conf.221 231REPORT(alerting)resp. conf.SETUPresp. conf.Unsuccessful241req
45、. ind.RELEASEresp. conf.RELEASEresp. conf.SETUPNOTE 3 INFORM 1-3resp. confs. includeS2=p., reason .a)Unsuccessful231REPORT(alerting)resp. conf.SETUPresp. conf.NOTE 5 INFORM 1-3resp. confs. includeS2=np., reason .a)NOTE 1 Networkknows that thecalled user ispoint-to-multipointconfiguration.241 251req.
46、 ind.SETUPreq. ind.251SETUPreq. ind.req. ind.RELEASEresp. conf.The reason is “UUS Service 2” cannot be provided because called party has point-to-multipoint configuration.req. ind.INFORM 1req. ind.INFORM 1resp. conf.RELEASEreq. ind.RELEASEreq. ind.INFORM 1req. ind.INFORM 2req. ind.INFORM 2resp. conf
47、.RELEASEreq. ind.INFORM 2req. ind.INFORM 3req. ind.INFORM 3req. ind.INFORM 3req. ind.INFORM 3req. ind.INFORM 4req. ind.REPORT (alerting)resp. conf.ACKREPORT(alerting)req. ind.INFORM 4req. ind.INFORM 1req. ind.INFORM 2a)431 441FIGURE 1-6/Q.87.D07 = 20 CM PAGE PLEINE10 Recommendation Q.87 (03/93)92191
48、1922FE1 FE2 FE3 FE4931932FE5923933 94194294395195294494594691291492A92B92C93A93B93C94A94B94C954913937938939947948949953934935936924925926927928929T1135500-91/d08rarbrcdrSETUP211req. ind.NOTE 1 INFORM 1-4req. inds. includeS3=re.REPORT(alerting)SETUPSETUPreq. ind.221221REPORT(alerting)224SETUPSETUP231
49、 241req. ind.REPORT(alerting)resp. conf.SETUP244245SETUP241 251244resp. conf.SETUPNOTE 2 INFORM 1-4req. confs. includeS3=p.INFORM 8FIGURE 1-7/Q.87 (sheet 1 of 2)UUS Service 3S3 requested and essential225req. ind.req. ind.INFORM 9req. ind.231225req. ind.224resp. conf.INFORM 6req. ind.INFORM 10req. ind.req. ind.INFORM 1req. ind.INFORM 2resp. conf.INFORM 2req. ind.INFORM 3req. ind.INFORM 3resp. conf.INFORM 11INFORM 7resp. conf.INFORM 1resp. conf.INFORM 5req. ind.INFORM 4req
