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ETSI ETR 285 TECHNICAL March 1996 REPORT Source: ETSI TC-SPS Reference: DTR/SPS-01030 ICS: 33.080 Key words: ISDN, supplementary service Integrated Services Digital Network (ISDN); User-to-User Signalling (UUS) supplementary service; Functional capabilities and information flows ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [email protected] Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16 Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. © European Telecommunications Standards Institute 1996. All rights reserved.

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Page 1: ETSI ETR 285 TECHNICAL March 1996 REPORT...Page 5 ETR 285: March 1996 Foreword This ETSI Technical Report (ETR) has been produced by the Signalling Protocols and Switching (SPS) Technical

ETSI ETR 285

TECHNICAL March 1996

REPORT

Source: ETSI TC-SPS Reference: DTR/SPS-01030

ICS: 33.080

Key words: ISDN, supplementary service

Integrated Services Digital Network (ISDN);User-to-User Signalling (UUS) supplementary service;

Functional capabilities and information flows

ETSI

European Telecommunications Standards Institute

ETSI Secretariat

Postal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [email protected]

Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16

Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 1996. All rights reserved.

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Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents

Foreword .......................................................................................................................................................5

1 Scope ..................................................................................................................................................7

2 Normative references..........................................................................................................................7

3 Definitions............................................................................................................................................8

4 Abbreviations.......................................................................................................................................8

5 Description ..........................................................................................................................................9

6 Derivation of the functional model .....................................................................................................106.1 Functional model description .............................................................................................106.2 Description of functional entities ........................................................................................106.3 Relationship with the basic service ....................................................................................10

7 Information flows ...............................................................................................................................107.1 Information flow diagrams..................................................................................................10

7.1.1 Service 1 .......................................................................................................117.1.2 Service 2 .......................................................................................................157.1.3 Service 3 .......................................................................................................16

7.2 Definition of individual information flows............................................................................187.2.1 Relationship ra ..............................................................................................18

7.2.1.1 SERVICE 1 ..........................................................................187.2.1.2 SERVICE 1 REJECTED......................................................187.2.1.3 SERVICE 2 ..........................................................................187.2.1.4 SERVICE 2 REJECTED......................................................187.2.1.5 SERVICE 3 ..........................................................................197.2.1.6 SERVICE 1 REJECTED......................................................197.2.1.7 DATA UNIT..........................................................................197.2.1.8 FLOW CONTROL ...............................................................19

7.2.2 Relationship rb ..............................................................................................207.2.2.1 SERVICE 1 ..........................................................................207.2.2.2 SERVICE 1 REJECT...........................................................207.2.2.3 SERVICE 2 ..........................................................................207.2.2.4 SERVICE 2 REJECT...........................................................207.2.2.5 SERVICE 3 ..........................................................................207.2.2.6 SERVICE 3 REJECT...........................................................207.2.2.7 DATA UNIT..........................................................................20

7.2.3 Relationship rc...............................................................................................207.2.3.1 SERVICE 1 ..........................................................................207.2.3.2 SERVICE 1 REJECTED......................................................207.2.3.3 SERVICE 2 ..........................................................................207.2.3.4 SERVICE 2 REJECTED......................................................217.2.3.5 SERVICE 3 ..........................................................................217.2.3.6 SERVICE 1 REJECTED......................................................217.2.3.7 DATA UNIT..........................................................................217.2.3.8 FLOW CONTROL ...............................................................21

8 SDL diagrams for functional entities .................................................................................................218.1 SDL diagrams for FE1 .......................................................................................................22

8.1.1 Service 1 .......................................................................................................228.1.2 Service 2 .......................................................................................................258.1.3 Service 3 .......................................................................................................28

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8.2 SDL diagrams for FE2....................................................................................................... 318.2.1 Service 1....................................................................................................... 318.2.2 Service 2....................................................................................................... 348.2.3 Service 3....................................................................................................... 38

8.3 SDL diagrams for FE3....................................................................................................... 418.3.1 Service 1....................................................................................................... 418.3.2 Service 2....................................................................................................... 448.3.3 Service 3....................................................................................................... 48

8.4 SDL diagrams for FE4....................................................................................................... 518.4.1 Service 1....................................................................................................... 518.4.2 Service 2....................................................................................................... 548.4.3 Service 3....................................................................................................... 57

9 Functional Entity Actions (FEAs) ...................................................................................................... 609.1 FEAs of FE1...................................................................................................................... 609.2 FEAs of FE2...................................................................................................................... 609.3 FEAs of FE3...................................................................................................................... 609.4 FEAs of FE4...................................................................................................................... 60

10 Allocation of functional entities to physical locations ........................................................................ 61

History ......................................................................................................................................................... 62

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Foreword

This ETSI Technical Report (ETR) has been produced by the Signalling Protocols and Switching (SPS)Technical Committee of the European Telecommunications Standards Institute (ETSI).

ETRs are informative documents resulting from ETSI studies which are not appropriate for EuropeanTelecommunication Standard (ETS) or Interim European Telecommunication Standard (I-ETS) status. AnETR may be used to publish material which is either of an informative nature, relating to the use or theapplication of ETSs or I-ETSs, or which is immature and not yet suitable for formal adoption as an ETS oran I-ETS.

In accordance with CCITT Recommendation I.130, the following three level structure is used to describethe supplementary telecommunications services as provided by European public telecommunicationsoperators under the pan-European Integrated Services Digital Network (ISDN):

- Stage 1: is an overall service description, from the user's standpoint;

- Stage 2: identifies the functional capabilities and information flows needed to support the servicedescribed in stage 1; and

- Stage 3: defines the signalling system protocols and switching functions needed to implement theservice described in stage 1.

This ETR details the stage 2 aspects (functional capabilities and information flows) needed to support theUser-to-User Signalling (UUS) supplementary service. The stage 1 and stage 3 aspects are detailed inETS 300 284 and ETS 300 286-1, respectively.

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Blank page

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1 Scope

This ETSI Technical Report (ETR) defines the stage two for the User-to-User Signalling (UUS)supplementary service of the pan-European Integrated Services Digital Network (ISDN) as provided byEuropean public telecommunications operators. Stage two identifies the functional capabilities and theinformation flows needed to support the service description. The stage two description also identifies useroperations not directly associated with a call (see CCITT Recommendation I.130 [2]).

NOTE: This stage 2 description reflects a premature status of the UUS supplementaryservice, i.e. the functional capabilities and information flows are not complete and maynot be in full alignment with the corresponding stage 1 and stage 3 descriptions.

This ETR is specified according to the methodology specified in CCITT Recommendation Q.65 [4].

This ETR does not formally describe the relationship between this supplementary service and the basiccall but, where possible this information is included for guidance.

In addition this ETR does not specify the requirements where the service is provided to the user via aprivate ISDN. This ETR does not specify the requirements for the allocation of defined functional entitieswithin a private ISDN; it does however, define which functional entities may be allocated to a private ISDN.

This ETR 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 enables a user to send/receive a limited amount of information to/fromanother user over the signalling channel in association with a call to the other user.

The UUS supplementary service is applicable to all circuit-switched telecommunications services.

This ETR is applicable to the stage three standards for the UUS service. The term stage three is alsodefined in CCITT Recommendation I.130 [2]. Where the text indicates the status of a requirement, i.e. astrict command or prohibition, as authorisation leaving freedom, as capability or possibility, this shall bereflected in the text of the relevant stage three standard.

Furthermore, conformance to this ETR is met by conforming to the stage three standards with the field ofapplication appropriate to the equipment being implemented. Therefore, no method of testing is providedfor this ETR.

2 Normative references

This ETR incorporates by dated and undated reference, provisions from other publications. Thesereferences are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this ETRonly when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies.

[1] ITU-T Recommendation I.112 (1993): "Vocabulary of terms of ISDN".

[2] CCITT Recommendation I.130 (1988): "Method for the characterisation oftelecommunication services supported by an ISDN and network capabilities ofan ISDN".

[3] ITU-T Recommendation I.210 (1993): "Principles of telecommunication servicessupported by an ISDN and the means used to describe them".

[4] CCITT Recommendation Q.65 (1988): "Stage 2 of the method for thecharacterisation of services supported by an ISDN".

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[5] CCITT Recommendation Q.71 (1988): "ISDN 64 kbit/s circuit mode switchedbearer service".

[6] CCITT Recommendation Z.100 (1988): "Specification and DescriptionLanguage (SDL)".

3 Definitions

For the purposes of this ETR, the following definitions apply:

data unit: A unit of UUI to be transferred at any instance by the UUS supplementary service.

explicit request: The UUS supplementary service is considered as explicitly requested when a userrequests the activation of the UUS supplementary service.

implicit request: The UUS supplementary service is considered as implicitly requested when no explicitrequest for the UUS supplementary service is made and UUI is sent by the user when originating a call.

Integrated Services Digital Network (ISDN): See ITU-T Recommendation I.112 [1], definition 308.

point-to-multipoint configuration: A situation where multiple responses to an incoming call can occur.

point-to-point configuration: A situation where multiple responses to an incoming call cannot occur.

service; telecommunication service: See ITU-T Recommendation I.112 [1], definition 201.

service 1: A form of the UUS supplementary service where UUI can be sent and received during theorigination and termination of calls.

service 2: A form of the UUS supplementary service where UUI can be sent and received after the callinguser has received an indication that the called user is being informed of the call and prior to theestablishment of the connection.

service 3: A form of the UUS supplementary service where UUI can be sent and received only while theconnection is established.

supplementary service: See ITU-T Recommendation I.210 [3], subclause 2.4.

"UUS not required" request: A request where originating a call shall continue even if the request for theUUS supplementary service cannot be accepted.

"UUS required" request: A request where originating a call shall be rejected if the request for the UUSsupplementary service cannot be accepted.

4 Abbreviations

For the purposes of this ETR, the following abbreviations apply:

FEA Functional Entity ActionISDN Integrated Services Digital NetworkLE Local ExchangePTNX Private Telecommunication Network ExchangeSDL Specification and Description LanguageTE Terminal EquipmentUUI User-to-User InformationUUS User-to-User Signalling

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5 Description

The user can transfer User-to-User Information (UUI) data units in different phases of the call dependingon the service(s) to which the user subscribes. These are:

Service 1: the UUI data units are transferred during the setup and clearing phases of the call inassociation with basic call information flows (see CCITT Recommendation Q.71 [5]);

Service 2: the UUI data units are transferred during the alerting phase of the call (i.e. after REPORT(alerting) req.ind and before SETUP resp.conf) independently of the call messages. Twodedicated UUI data units can be transmitted in each direction;

Service 3: the UUI data units are transferred during the active phase of the call (i.e. after SETUPresp.conf) independently of the call control messages. The necessary limitation of the amountof UUI service 3 can be placed on the number of UUI data units transmitted or the throughputcan be limited (network option).

Service 1, service 2 and service 3 allow the transmission of 128 octets per message as a maximum.

Service 1 and service 2 shall be requested by the calling user at the setup of the call, if UUI data units isdesired in either direction. Service 3 may be requested by the calling user at the setup or during the activephase of the call. As a service provider option, service 3 can be requested by the called user only duringthe active phase of the call.

Service 2 and service 3 shall be explicitly requested. Service 1 may be implicitly or explicitly requested.The service is implicitly requested when UUI data units are included in the call request (i.e. the service isrequested at the same time it is invoked).

At the call setup, the calling user can request service 1, service 2 and service 3 as "UUS required" and ifUUI data units cannot be passed then the call is cleared. If service 3 is requested during the call, it cannotbe requested as "UUS required".

For service 2 and service 3 the network shall confirm the request for the UUS supplementary service. Thisconfirmation is preceded by an end-to-end check by the network for service availability.

When service 1 is explicitly requested, the network shall inform the remote user of the request. Theremote user shall accept or reject the activation as described for service 2 and service 3.

For service 2 and service 3 the network shall interrogate the destination user for the service availability.No response from the destination user is taken by the network as a rejection of the UUS supplementaryservice request. The network shall explicitly indicate to the originating user whether the requested servicehas been successfully activated or not. In the case of unsuccessful activation, the network shall indicatewhether this condition is due to the destination user or not.

When service 1 is explicitly requested, the network shall inform the destination user of the request. Thedestination party shall accept or reject the activation as described for service 2 and service 3.

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6 Derivation of the functional model

6.1 Functional model description

The functional model for the UUS supplementary service is shown in figure 1.

ÚÄÄÄ¿ ra ÚÄÄÄ¿ rb ÚÄÄÄ¿ rc ÚÄÄÄ¿³FE1ÃÄÄÄÄÄÄÄÄ´FE2ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´FE3ÃÄÄÄÄÄÄÄÄ´FE4³ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 1: Functional model

6.2 Description of functional entities

The functional entities required for the UUS supplementary service above those of basic call are:

FE1: Requesting user's agent;FE2: Requesting control entity;FE3: Responding control entity;FE4: Responding user's agent.

6.3 Relationship with the basic service

The relationship of the UUS supplementary service with the basic service is shown in figure 2.

NOTE: The basic call model is defined in CCITT Recommendation Q.71 [5], § 3.2.1 with theexception that r1 represents an outgoing call relationship from a CCA and r3 representsan incoming call relationship to a CCA.

ÚÄÄÄ¿ ra ÚÄÄÄ¿ rb ÚÄÄÄ¿ rc ÚÄÄÄ¿³FE1ÃÄÄÄÄÄÄÄÄ´FE2ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´FE3ÃÄÄÄÄÄÄÄÄ´FE4³ÃÄÄÄ´ r1 ÃÄÄÄ´ r2 ÚÄÄÄ¿ r2 ÃÄÄÄ´ r3 ÃÄÄÄ´³CCAÃÄÄÄÄÄÄÄÄ´CC ÃÄÄÄÄÄÄÄÄ´CC ÃÄÄÄÄÄÄÄÄ´CC ÃÄÄÄÄÄÄÄÄ´CCA³ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 2: Relationship between the UUS supplementary service and the basic service

7 Information flows

7.1 Information flow diagrams

Figures 3 to 6 are related to service 1, figure 7 is related to service 2 and figures 8 and 9 are related toservice 3.

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7.1.1 Service 1 rc Ú-----------------------------------¿ | | ÚÄÄÄÄÄ¿ ra ÚÄÄÄÄÄ¿ rb ÚÄÄÄÄÄ¿ rc ÚÄÄÄÄÄ¿ ÚÄÄÄÄÄ¿ ³ FE1 ³--------------³ FE2 ³--------------³ FE3 ³--------------³ FE4 ³ ³ FE4 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³ ³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ ³ ³ req. ³911³ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³912³ DATA UNIT ³ ³ |----->| ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ ³ ³ req.ind ³921³ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³922³ DATA UNIT ³ ³ |----->| ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ ³ ³ req.ind ³931³ ³ ³ ³ ³ ³ ³ ³ ³ ³932³ DATA UNIT ³ ³ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ³ ³ req.ind ³941³ ³ ³ ³ ³ ³ ³ ³ ³ ³942³ ³ ³ SERVICE 1 ³ ³ ³ ³ ³ ³ SETUP ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ |----->| ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ req.ind ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄ>ÃÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³ ³ ³941³ ³ ³ ³ ³ ³ ³ ³ ³ ³942³ SERVICE 1 ³ ³ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄ´<ÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄÄ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ DATA UNIT ³942³ ³ ³ resp. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ req.ind ³ ³ DATA UNIT ³932³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ DATA UNIT ³922³ req.ind ³ ³REPORT(alerting)³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ |<-----| ³ ³ ³ ³ DATA UNIT ³911³ req.ind ³ ³ ³ ³ req.ind ³ ³ ³ ³ DATA UNIT<ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄconf. ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³942³ resp. ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ ³ ³ SETUP ³ ³ resp.conf ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄÄ ³ ³ SETUP ³ ³ resp.conf ³ ³ DATA UNIT ³944³ ³ ³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ resp.conf ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ DISCONNECT ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ |<-----| ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ RELEASE ³ ³ req.ind ³ ³ ³ ³ DATA UNITind. ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄÄ ³ ³ DISCONNECT ³ ³ req.ind ³ ³ DATA UNIT ³944³ ³ ³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ req.ind ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 3: Service 1 of UUS supplementary service, successful implicit "UUS not required" request, called user is point-to-multipoint

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ÚÄÄÄÄÄ¿ ra ÚÄÄÄÄÄ¿ rb ÚÄÄÄÄÄ¿ rc ÚÄÄÄÄÄ¿ ³ FE1 ³--------------³ FE2 ³--------------³ FE3 ³--------------³ FE4 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ³ ³ SETUP ³ ³ ³ ³ ³ ³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ req. ³911³ ³ ³ SETUP ³ ³ ³ ³ ³912³ DATA UNIT ³ ³ |----->| ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ req.ind ³921³ ³ ³ SETUP ³ ³ ³ ³ ³922³ DATA UNIT ³ ³ |----->| ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ req.ind ³931³ ³ ³ ³ ³ ³ ³ ³932³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³941³ ³ ³ ³ ³ ³ ³ ³942³ SERVICE 1 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ DATA UNIT ³941³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ req.ind ³ ³ DATA UNIT ³931³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³921³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³911³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SETUP ³ ³ ind. ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ SETUP ³ ³ resp.conf ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ SETUP ³ ³ resp.conf ³ ³ DATA UNIT ³944³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ resp.conf ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DISCONNECT ³ ³ ind. ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ RELEASE ³ ³ req.ind ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ DISCONNECT ³ ³ req.ind ³ ³ DATA UNIT ³944³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ req.ind ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 4: Service 1 of UUS supplementary service, successful implicit "UUS not required" request, called user is point-to-point

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ÚÄÄÄÄÄ¿ ra ÚÄÄÄÄÄ¿ rb ÚÄÄÄÄÄ¿ rc ÚÄÄÄÄÄ¿ ³ FE1 ³--------------³ FE2 ³--------------³ FE3 ³--------------³ FE4 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ³ ³ SETUP ³ ³ ³ ³ ³ ³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ req. ³911³ ³ ³ SETUP ³ ³ ³ ³ ³912³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ req.ind ³921³ ³ ³ SETUP ³ ³ ³ ³ ³922³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ req.ind ³931³ ³ ³ ³ ³ ³ ³ ³932³ SERVICE 1 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³941³ ³ ³ ³ ³ ³ ³ ³942³ SERVICE 1 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ SERVICE 1 ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ SERVICE 1 ³941³ resp. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ req.ind ³ ³ SERVICE 1 ³931³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 1 ³921³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 1 ³911³ resp.conf ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SETUP ³ ³ conf. ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ SETUP ³ ³ resp.conf ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ SETUP ³ ³ resp.conf ³ ³ DATA UNIT ³944³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ resp.conf ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DISCONNECT ³ ³ ind. ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ RELEASE ³ ³ req.ind ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ DISCONNECT ³ ³ req.ind ³ ³ DATA UNIT ³944³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ req.ind ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 5: Service 1 of UUS supplementary service, successful explicit "UUS required" or "UUS not required" request, called user is point-to-point

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rc Ú-----------------------------------¿ | | ÚÄÄÄÄÄ¿ ra ÚÄÄÄÄÄ¿ rb ÚÄÄÄÄÄ¿ rc ÚÄÄÄÄÄ¿ ÚÄÄÄÄÄ¿ ³ FE1 ³--------------³ FE2 ³--------------³ FE3 ³--------------³ FE4 ³ ³ FE4 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³ ³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ ³ ³ req. ³911³ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³912³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ ³ ³ req.ind ³921³ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³922³ SERVICE 1 ³ ³ |----->| ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ req.ind ³ ³ ³ ³ ³ ³ ³ ³ req.ind ³931³ ³ ³ ³ ³ ³ ³ ³ ³ ³932³ SERVICE 1 ³ ³ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ³ ³ req.ind ³941³ ³ ³ ³ ³ ³ ³ ³ ³ ³942³ ³ ³ SERVICE 1 ³ ³ ³ ³ ³ ³ SETUP ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ |----->| ³ ³ ³ ³ ³ ³ ³ ³ ³ ´ req.ind ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ SERVICE 1 ³ ³ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄ>ÃÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³ ³ ³941³ ³ ³ ³ ³ ³ ³ ³ ³ ³942³ SERVICE 1 ³ ³ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ ³ ³ SERVICE 1 ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄ´<ÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄÄ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ SERVICE 1 ³942³ ³ ³ resp. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄ¿ ³ ³ ³ ³ req.ind ³ ³ SERVICE 1 ³932³ resp.conf ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ SERVICE 1 ³922³ resp.conf ³ ³REPORT(alerting)³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ |<-----| ³ ³ ³ ³ SERVICE 1 ³911³ resp.conf ³ ³ Ã Å req.ind ³ Ã ³ ³ SERVICE 1<ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄconf. ³ ³ ³ ³ ³ ³ SERVICE 1 ³ ³ ³942³ resp. ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ resp.conf ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ ³ ³ SETUP ³ ³ resp.conf ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄÄ ³ ³ SETUP ³ ³ resp.conf ³ ³ DATA UNIT ³944³ ³ ³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ resp.conf ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ DISCONNECT ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ |<-----| ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ RELEASE ³ ³ req.ind ³ ³ ³ ³ DATA UNITind. ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄ´ ÃÄÄÄÄÄÄÄÄÄÄÄÄ ³ ³ DISCONNECT ³ ³ req.ind ³ ³ DATA UNIT ³944³ ³ ³ req. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ req.ind ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 6: Service 1 of UUS supplementary service, successful explicit "UUS not required" request, called user is point-to-multipoint

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7.1.2 Service 2

ÚÄÄÄÄÄ¿ ra ÚÄÄÄÄÄ¿ rb ÚÄÄÄÄÄ¿ rc ÚÄÄÄÄÄ¿ ³ FE1 ³--------------³ FE2 ³--------------³ FE3 ³--------------³ FE4 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³ ³ |----->| ³ ³ ³ ³ ³ ³ SERVICE 2 ³ ³ req.ind ³ ³ SETUP ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ |----->| ³ ³ ³ ³ req. ³911³ SERVICE 2 ³ ³ req.ind ³ ³ SETUP ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ |----->| ³ ³ ³ ³ req.ind ³921³ SERVICE 2 ³ ³ req.ind ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³931³ SERVICE 2 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³941³ SERVICE 2 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ SERVICE 2 ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³REPORT(alerting)³ ³ req.ind ³ ³ SERVICE 2 ³941³ resp. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ req.ind ³ ³ SERVICE 2 ³931³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 2 ³921³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 2 ³911³ resp.conf ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ conf. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req. ³913³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³923³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³933³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³943³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ ³ ³ ³ ³ DATA UNIT ³943³ req. ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³933³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³923³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³913³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 7: Service 2 of UUS supplementary service, successful "UUS required" or "UUS not required" request, called user is point-to-point

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7.1.3 Service 3

ÚÄÄÄÄÄ¿ ra ÚÄÄÄÄÄ¿ rb ÚÄÄÄÄÄ¿ rc ÚÄÄÄÄÄ¿ ³ FE1 ³--------------³ FE2 ³--------------³ FE3 ³--------------³ FE4 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³ ³ |----->| ³ ³ ³ ³ ³ ³ SERVICE 3 ³ ³ req.ind ³ ³ SETUP ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ |----->| ³ ³ ³ ³ req. ³911³ SERVICE 3 ³ ³ req.ind ³ ³ SETUP ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ |----->| ³ ³ ³ ³ req.ind ³921³ SERVICE 3 ³ ³ req.ind ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³931³ SERVICE 3 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³941³ SERVICE 3 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ SETUP ³ ³ ³ ³ ³ ³ ³ ³ |<-----| ³ ³ ³ ³ ³ ³ SETUP ³ ³ resp.conf ³ ³ SERVICE 3 ³ ³ ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ SETUP ³ ³ resp.conf ³ ³ SERVICE 3 ³941³ resp. ³ ³ |<-----| ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ resp.conf ³ ³ SERVICE 3 ³931³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 3 ³921³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 3 ³911³ resp.conf ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ conf. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req. ³914³ ³ ³ ³ ³ ³ ³ Ã915Å DATA UNIT Å ´ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³924³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³934³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³944³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ ³ ³ ³ ³ ³944³ req. ³ ³ ³ ³ ³ ³ DATA UNIT ³945³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

Figure 8: Service 3 of UUS supplementary service, successful "UUS required" or "UUS not required" request

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ÚÄÄÄÄÄ¿ ra ÚÄÄÄÄÄ¿ rb ÚÄÄÄÄÄ¿ rc ÚÄÄÄÄÄ¿ ³ FE1 ³--------------³ FE2 ³--------------³ FE3 ³--------------³ FE4 ³ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ ÀÂÄÄÄÂÙ SERVICE 3 ³ ³ ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req. ³911³ SERVICE 3 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³921³ SERVICE 3 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³931³ SERVICE 3 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³941³ SERVICE 3 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ SERVICE 3 ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ ³ ³ ³ ³ SERVICE 3 ³941³ resp. ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 3 ³931³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 3 ³921³ resp.conf ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ SERVICE 3 ³911³ resp.conf ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ conf. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ ³ ³ ³ ³ ÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req. ³914³ ³ ³ ³ ³ ³ ³ ³915³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³924³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³934³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ>ÅÄÄÄ´ ³ ³ ³ ³ ³ ³ req.ind ³944³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄ> ³ ³ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ DATA UNIT ³ ³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄ ³ ³ ³ ³ ³ ³ ³944³ req. ³ ³ ³ ³ ³ ³ DATA UNIT ³945³ ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³934³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³924³ req.ind ³ ³ ³ ³ ÃÄÄÄÅ<ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ DATA UNIT ³914³ req.ind ³ ³ ³ ³ ³ ³ <ÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ´ ³ ³ ³ ³ ³ ³ ind. ³ ³ ³ ³ ³ ³ ³ ³ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ ÀÄÄÄÙ

NOTE: For the UUS supplementary service, the requesting user agent is always FE1. For a request during the active phase of basic call, FE1 is located at the callingside, or as a network option, at the called side.

Figure 9: Service 3 of UUS supplementary service, successful "UUS required" or "UUS not required" request

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7.2 Definition of individual information flows

7.2.1 Relationship ra

7.2.1.1 SERVICE 1

The SERVICE 1 information flow is used to request and respond to the activation of service 1 of the UUSsupplementary service.

The contents of the SERVICE 1 information flow are as contained in table 1.

Table 1: SERVICE 1 information flow

Parameter Value req.ind resp.confForm - UUS request required M

- UUS request not required

7.2.1.2 SERVICE 1 REJECTED

The contents of the SERVICE 1 REJECTED information flow are as contained in table 2.

Table 2: SERVICE 1 REJECTED information flow

Parameter Value req.indReason - rejected by user M

- rejected by network

7.2.1.3 SERVICE 2

The SERVICE 2 information flow is used to request and respond to the activation of service 2 of the UUSsupplementary service.

The contents of the SERVICE 2 information flow are as contained in table 3.

Table 3: SERVICE 2 information flow

Parameter Value req.ind resp.confForm - UUS request required M

- UUS request not required

7.2.1.4 SERVICE 2 REJECTED

The contents of the SERVICE 2 REJECTED information flow are as contained in table 4.

Table 4: SERVICE 2 REJECTED information flow

Parameter Value req.indReason - rejected by user M

- rejected by network

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7.2.1.5 SERVICE 3

The SERVICE 3 information flow is used to request and respond to the activation of service 3 of the UUSsupplementary service.

The contents of the SERVICE 3 information flow are as contained in table 5.

Table 5: SERVICE 3 information flow

Parameter Value req.ind resp.confForm - UUS request required M

- UUS request not requiredNOTE: The value "UUS request required" shall only be used in conjunction with a request at call

establishment.

7.2.1.6 SERVICE 1 REJECTED

The contents of the SERVICE 1 REJECTED information flow are as contained in table 6.

Table 6: SERVICE 3 REJECTED information flow

Parameter Value req.indReason - rejected by user M

- rejected by network

7.2.1.7 DATA UNIT

The DATA UNIT information flow is used to transfer data during the invocation for all three services of theUUS supplementary service.

The contents of the DATA UNIT information flow are as contained in table 7.

Table 7: DATA UNIT information flow

Parameter Value req.indUser protocol identifier MData O (NOTE 2)More data O (NOTE 1)NOTE 1: Parameter is included for service 3 only.NOTE 2: Mandatory except in the case of a service 1 implicit request.

7.2.1.8 FLOW CONTROL

The FLOW CONTROL information flow is used to indicate to the user agent the need to restrict the flow ofdata during service 3 of the UUS supplementary service.

The contents of the FLOW CONTROL information flow are as contained in table 8.

Table 8: FLOW CONTROL information flow

Parameter Value req.indStatus - On M

- Off

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7.2.2 Relationship rb

7.2.2.1 SERVICE 1

The meaning and contents of the SERVICE 1 information flow are identical to those for relationship ra asshown in subclause 7.2.1.1.

7.2.2.2 SERVICE 1 REJECT

The meaning and contents of the SERVICE 1 REJECT information flow are identical to those forrelationship ra as shown in subclause 7.2.1.2.

7.2.2.3 SERVICE 2

The meaning and contents of the SERVICE 2 information flow are identical to those for relationship ra asshown in subclause 7.2.1.3.

7.2.2.4 SERVICE 2 REJECT

The meaning and contents of the SERVICE 2 REJECT information flow are identical to those forrelationship ra as shown in subclause 7.2.1.4.

7.2.2.5 SERVICE 3

The meaning and contents of the SERVICE 3 information flow are identical to those for relationship ra asshown in subclause 7.2.1.5.

7.2.2.6 SERVICE 3 REJECT

The meaning and contents of the SERVICE 3 REJECT information flow are identical to those forrelationship ra as shown in subclause 7.2.1.6.

7.2.2.7 DATA UNIT

The meaning and contents of the DATA UNIT information flow are identical to those for relationship ra asshown in subclause 7.2.1.7.

7.2.3 Relationship rc

7.2.3.1 SERVICE 1

The meaning and contents of the SERVICE 1 information flow are identical to those for relationship ra asshown in subclause 7.2.1.1.

7.2.3.2 SERVICE 1 REJECTED

The contents of the SERVICE 1 REJECTED information flow are as contained in table 9.

Table 9: SERVICE 1 REJECTED information flow

Parameter Value req.indReason - rejected by user M

7.2.3.3 SERVICE 2

The meaning and contents of the SERVICE 2 information flow are identical to those for relationship ra asshown in subclause 7.2.1.3.

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7.2.3.4 SERVICE 2 REJECTED

The contents of the SERVICE 2 REJECTED information flow are as contained in table 10.

Table 10: SERVICE 2 REJECTED information flow

Parameter Value req.indReason - rejected by user M

7.2.3.5 SERVICE 3

The meaning and contents of the SERVICE 3 information flow are identical to those for relationship ra asshown in subclause 7.2.1.5.

7.2.3.6 SERVICE 1 REJECTED

The contents of the SERVICE 1 REJECTED information flow are as contained in table 11.

Table 11: SERVICE 3 REJECTED information flow

Parameter Value req.indReason - rejected by user M

7.2.3.7 DATA UNIT

The meaning and contents of the DATA UNIT information flow are identical to those for relationship ra asshown in subclause 7.2.1.7.

7.2.3.8 FLOW CONTROL

The meaning and contents of the FLOW CONTROL information flow are identical to those for relationshipra as shown in subclause 7.2.1.8.

8 SDL diagrams for functional entities

All Specification and Description Language (SDL) diagrams for FEs are described according to CCITTRecommendation Z.100 [6].

NOTE: The dotted elements in the following SDL diagrams are part of basic call model definedin CCITT Recommendation Q.71 [5], and are present for information purposes only.

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8.1 SDL diagrams for FE1

The SDL diagrams for FE1 are shown in figures 10, 11 and 12.

8.1.1 Service 1

Process FE1_UUS1 Page_1(3)

clear_on_fail:= false

UUS1Idle

SERVICE 1ind.

implicit

"include datain request"

data : ="required UU1 data"

DATA UNITreq.ind (data) ra

UUS1Active

data : ="null data"

form

"include datain request"

SERVICEreq.ind(form) (data)

UUS1Requested

ra

data :="required UUI data"

Clear_on_fail:= true

user

YES

NO

YESNO

preferred

No

Yes

required

Figure 10 (sheet 1 of 3)

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Process FE1_UUS1 Page_2(3)

UUS1Requested

basic callcleared

clearing fornormal basiccall reasons

from basic call

SERVICE 1REJECTreq. ind.reason

ra

SERVICE 1REJECTind.

user

Clear-on-fail

clearbasic call to basic call

basic callconnectedfrom basic call

SERVICE 1REJECTind.

user

clear-on-fail

clear basic call

to basiccall

SERVICE 1resp.conf(data)

ra

"data included"

SERVICE 1conf.user

UUS 1active

send data to user

TRUE

FALSE

TRUE

FALSE

No

Yes

Figure 10 (sheet 2 of 3)

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Process FE1_UUS1 Page_3(3)

UUS1Active

DATA UNITreq.ind(data)

DATA UNITind.

UUS1Active

user

raDATA UNITreq.user

Data: ="required UU1 data"

DATA UNITreq.ind(data)

UUS1Active

ra

basic callcleared

from basiccall

Figure 10 (sheet 3 of 3)

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8.1.2 Service 2

Process FE1_UUS2 Page_1(3)

Clear_on_fail:= false

UUS2Idle

SERVICE 2ind.

form

clear_on_fail:= true

SERVICE 2req.ind(form)

ra

UUS2Requested

user

required

preferred

Figure 11 (sheet 1 of 3)

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Process FE1_UUS2 Page_2(3)

UUS2Requested

SERVICE 2REJECTreq.ind(reason)

SERVICE 2 REJECTind.

user

Clear-on-fail

Clear basic call to basic call

ra

SERVICE 2resp.conf

SERVICE 2conf.user

UUS2Active

ra

basic callalertingfrom basic call

basic callcleared from basic call

TRUE

FALSE

Figure 11 (sheet 2 of 3)

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Process FE1_UUS2 Page_3(3)

UUS2Active

DATA UNITreq. ind.(data)(more_data)

ra

DATA UNITind. user

UUS1Active

DATA UNITreq.

Data :="Required UUI data"

indicatemore data

DATA UNITreq.ind(data)(more_data)

ra

UUS1Active

more_data:= true

userbasic call cleared from basic call

No

Yes

Figure 11 (sheet 3 of 3)

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8.1.3 Service 3

Process FE1_UUS3 Page_1(3)

Clear_on_fail:= true

UUS3Idle

SERVICE 3ind.

form

request withSETUPreq.ind

SET (NOW +UUS3 response,

T-UUS3_response)

SERVICE 3req.ind(form)

UUS3Requested

ra

Clear_on_fail: = true

user

preferred

NO

YES

required

Figure 12 (sheet 1 of 3)

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Process FE1_UUS3 Page_2(3)

UUS3Requested

T-UUS3response

SERVICE 2 REJECTind.

user

Clear_on_fail

Clear basic call to basic call

SERVICE 3REJECTreq.ind(reason)

rabasic callconnected from basic call

SERVICE 3resp.conf

SERVICE 3conf.user

UUS3Active

ra

basic callcleared from basic call

TRUE

FALSE

Figure 12 (sheet 2 of 3)

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Process FE1_UUS3 page_3(3)

UUS3Active

DATA UNITreq.ind(data) (more_data)

DATA UNITind.

UUSActive

user

raDATA UNITreq.

data :="required UUI data"

indicatemore data

DATA UNITreq.ind(data) (more_data)

UUS3Active

more_data:= true

userbasic call cleared

from basiccall

No

Yes

Figure 12 (sheet 3 of 3)

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8.2 SDL diagrams for FE2

The SDL diagrams for FE2 are shown in figures 13, 14 and 15.

8.2.1 Service 1

Process FE2_UUS1 page_1(3)

clear_on_fail:= false

UUS1Idle

DATA UNITreq.ind(data)

available

Discarddata

DATA UNITreq.ind(data)

rb

UUS1Active

raSERVICE 1req.ind(data)

available

discarddata

reason :="rejected by the network"

SERVICE 1REJECTreq.ind(reason)

ra

form

Clear basiccall to basic call

form

SERVICE 1req.ind(form) (data)

rb

UUS1Requested

Clear_on_fail:= true

ra

NO

YES

NO

Required

Preferred

Yes

Preferred

Required

Figure 13 (sheet 1 of 3)

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Process FE2_UUS1 page_2(3)

UUS1Requested

basiccall cleared

clearing for normal basiccall reasons

from basiccall

basic callconnected

reason :="rejected by the network"

SERVICE 1REJECTreq.ind(reason)

clear_on_fail

clearbasic call

to basiccall

ra

frombasic call

SERVICE 1REJECTreq.ind(reason)

rbSERVICE 1resp.conf(data)

rb

SERVICE 1resp.conf(data)

UUS1Active

ra

True

False

Figure 13 (sheet 2 of 3)

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Process FE2_UUS1 page_3(3)

UUS1Active

DATA UNITreq.ind(data)

rb

DATA UNITreq.ind(data)

ra

UUS1Active

DATA UNITreq.ind(data)

ra

DATA UNITreq.ind(data)

rb

UUS1Active

basic callcleared

from basiccall

Figure 13 (sheet 3 of 3)

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8.2.2 Service 2

Process FE2_UUS2 page_1(4)

clear_on_fail :=false

UUS2Idle

SERVICE 2req.ind(form)

form

Available

SERVICE 2req.ind(form)

rb

UUS2Requested

reason :="rejected by the network"

SERVICE 2REJECTreq.ind(reason)

rb

clear_on_fail

Clear basiccall to basic call

clear_on_fail :=true

rb

preferred

Yes

No

false

true

required

Figure 14 (sheet 1 of 4)

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Process FE2_UUS2 page_2(4)

UUS2Requested

basic callclearing

reason :="rejected bythe network"

SERVICE 2REJECTreq.ind(reason)

ra

clear_on_fail

clearbasic call

to basiccall

from basiccall

basic callalerting

from basiccall

SERVICE 2REJECTreq.ind(reason)

rb

SERVICE 2REJECTreq.ind(reason)

ra

SERVICE 2resp.conf rb

N1 := 2

SERVICE 2resp.confra

UUS2Active

true

false

Figure 14 (sheet 2 of 4)

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Process FE2_UUS2 page_3(4)

UUS2Active

DATA UNITreq.ind(data) (more_data)

N1 := N1 - 1

N1 <= 0

Discard(data)

UUS2Active

DATA UNITreq.ind(data) (more_data)

UUS2Active

rb

ra

DATA UNITreq.ind(data)(more_data)

DATA UNITreq.ind(data) (more_data)

ra

UUS2Active

rb basic callconnected

from basiccall

"transfer UUS2in active phase"

UUS2Active (in Connect)

basic callcleared

from basiccall

YesNo

YesNo

Figure 14 (sheet 3 of 4)

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Process FE2_UUS2 page_4(4)

UUS2Active (in Connect)

DATA UNITreq.ind(data) (more_data)

N1 := N1 - 1

N1 <= 0

Discard(data)

UUS2Active (in Connect)

DATA UNITreq.ind(data) (more_data)

UUS2Active (in Connect)

rb

ra basic callcleared

from basiccall

YesNo

Figure 14 (sheet 3 of 4)

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Page 38ETR 285: March 1996

8.2.3 Service 3

Process FE2_UUS3 Page_1(3)

clear-on-fail : =false

UUS3Idle

SERVICE3req. ind.(form)

form

Available

SERVICE 3req. ind.(form)

requestwith

SETUPreq. ind.

SET (NOW +UUS3 response,

T-UUS3 response)

UUS3requested

rbreason : =

"rejected by thenetwork"

SERVICE 3REJECTreq. ind.(reason)

clear-on-fail

clear basic call to basic call

ra

clear-on-fail : =true

ra

required

YES

NO

YES

NO

false

true

preferred

Figure 15 (sheet 1 of 3)

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Page 39ETR 285: March 1996

Process FE2_UUS3 Page_2(3)

UUS3Requested

T-UUS3response

reason : ="rejected by the

network"

SERVICE 3REJECTreq.ind

clear-on-fail

clearbasic call

tobasic call

SERVICE 3REJECTreq.ind

rbbasic callconnected

frombasic call

basic callcleared

frombasic call

SERVICE 3resp.conf

N1 := 16

SET (NOW + 10s,Replenishment)

flow control:= false

UUS3Active

true

false

Figure 15 (sheet 2 of 3)

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Page 40ETR 285: March 1996

Process FE2_UUS3 Page_3(3)

UUS3Active

Replenishment

N1 := N1 + 8

N1 >= 16

SET (NOW + 10s,Replenishment)

Flow control:= false

FLOW CONTRreq.ind(off)

UUS3Active

ra

N1 := 16

Basic callcleared

tobasic call

DATA UNITreq.ind rb

DATA UNITreq.ind ra

UUS3Active

DATA UNITreq.ind(data)

N1 > 0

Discard(data)

Congestion

UUS3Active

Flow control := true

FLOW CONTROLreq.ind(on)

UUS3Active

ra

N1 := N1 - 1

DATA UNITreq.ind

UUS3Active

rb

ra

NoYes

Yes

No

Yes

No

Figure 15 (sheet 3 of 3)

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Page 41ETR 285: March 1996

8.3 SDL diagrams for FE3

The SDL diagrams for FE3 are shown in figures 16, 17 and 18.

8.3.1 Service 1

Process FE3_UUS1 page_1(3)

clear_on_fail:= false

UUS1Idle

DATA UNITreq.ind(data)

available

Discarddata

DATA UNITreq.ind(data)

rc, to all FE4s

UUS1Active

rbSERVICE 1req.ind(data)

available

reason :="rejected by the

network"

SERVICE 1REJECTreq.ind

rb

form

clearbasic call

to basiccall

form

SERVICE 1req.ind(form) (data)

rc,to all FE4s

UUS1Requested

Clear_on_fail :=true

rb

No

Yes

No

Required

Preferred

Yes

Preferred

Required

Figure 16 (sheet 1 of 3)

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Page 42ETR 285: March 1996

Process FE3_UUS1 page_2(3)

UUS1Requested

basiccall to clear tocalling user

stored response

clearing fornormal basiccall reason

reason :=response_reason

SERVICE 1REJECTreq.ind(reason)

rb

from basiccall

basic callconnected

reason :="rejected by the

user"

SERVICE 1REJECTreq.ind(reason)

clear_on_fail

clearbasic call

to basiccall

rb

frombasic call

SERVICE 1REJECTreq.ind(reason)

rcSERVICE 1resp.conf(data)

rc

in first REPORT(alerting)

req.ind

SERVICE 1resp.conf(data)

UUS1Active

rb

in first SETUPresp.conf

SETUP REJECTreq.ind

or DISCONNECTreq.ind

discardresponse

UUS1Requested

higherpriority basic

call reason

store response

UUS1Requested

NO

YES

true

false

Yes

No

Yes

No

No

Yes

No

Yes

Figure 16 (sheet 2 of 3)

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Page 43ETR 285: March 1996

Process FE3_UUS1 page_3(3)

UUS1Active

DATA UNITreq.ind(data)

contained inbasic call

information flow

firstREPORT (alerting)

receivedimplicit only

discard data

UUS1Active

DATA UNITreq.ind(data)

rb

UUS1Active

basic callconnected ?

higher prioritybasic call

reason

discard data

UUS1Active

storedata

first SETUPresp.confreceived

implicit only

discard data

UUS1Active

rcDATA UNITreq.ind(data)

rb

DATA UNITreq.ind(data)

rc,to all FE4s

UUS1Active

basic callcleared

stored data

data : =stored data

DATA UNITreq. ind.(data)

from basiccall

REPORT(alerting)req.ind

No

Yes

SETUPREJECTreq.ind orDISCONNECTreq.ind.

Yes

No

No

Yes

SETUPresp.conf

No

Yes

YES

NO

Figure 16 (sheet 3 of 3)

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Page 44ETR 285: March 1996

8.3.2 Service 2

Process FE3_UUS2 page_1(4)

clear_on_fail :=false

UUS2Idle

SERVICE 2req.ind(form)

form

Available

SERVICE 2req.ind(form)

rc

UUS2Requested

reason :="rejected by the network"

SERVICE 2REJECTreq.ind(reason)

rb

clear_on_fail

Clear basiccall

to basiccall

clear_on_fail :=true

rb

preferred

Yes

No

false

true

required

Figure 17 (sheet 1 of 4)

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Page 45ETR 285: March 1996

Process FE3_UUS2 page_2(4)

UUS2Requested

basic callclearing

reason :="rejected by

the user"

SERVICE 2REJECTreq.ind(reason)

ra

clear_on_fail

clearbasic call

to basiccall

frombasic call

basic callalerting

frombasic call

SERVICE 2REJECTreq.ind(reason)

rb

SERVICE 2REJECTreq.ind(reason)

ra

SERVICE 2resp.conf rb

N1 := 2

SERVICE 2resp.conf ra

UUS2Active

true

false

Figure 17 (sheet 2 of 4)

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Page 46ETR 285: March 1996

Process FE3_UUS2 page_3(4)

UUS2Active

DATA UNITreq.ind(data) (more_data)

N1 := N1 - 1

N1 <= 0

Discard(data)

UUS2Active

DATA UNITreq.ind(data) (more_data)

UUS2Active

rb

rc

DATA UNITreq.ind(data)(more_data)

DATA UNITreq.ind(data) (more_data)

rc

UUS2Active

rb basic callconnected

from basiccall

"transfer UUS2in active phase"

UUS2Active (in Connect)

basic callcleared

from basiccall

YesNo

YesNo

Figure 17 (sheet 3 of 4)

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Page 47ETR 285: March 1996

Process FE3_UUS2 page_4(4)

UUS2Active (in Connect)

DATA UNITreq.ind(data)(more_data)

DATA UNITreq.ind(data) (more_data)

rc

UUS2Active (in Connect)

rb basic callcleared

from basiccall

Figure 17 (sheet 3 of 4)

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Page 48ETR 285: March 1996

8.3.3 Service 3

Process FE3_UUS3 Page_1(3)

clear-on-fail : =false

UUS3Idle

SERVICE3req. ind.(form)

form

Available

SERVICE 3req. ind.(form)

requestwith

SETUPreq. ind.

SET (NOW +UUS3 response,

T-UUS3 response)

UUS3requested

rcreason : =

"rejected by theuser"

SERVICE 3REJECTreq. ind.(reason)

clear-on-fail

clear basic call to basic call

rb

clear-on-fail : =true

rb

required

YES

NO

YES

NO

false

true

preferred

Figure 18 (sheet 1 of 3)

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Page 49ETR 285: March 1996

Process FE3_UUS3 Page_2(3)

UUS3Requested

T-UUS3response

reason : ="rejected by the

user"

SERVICE 3REJECTreq.ind

clear-on-fail

clearbasic call

tobasic call

SERVICE 3REJECTreq.ind

rcbasic callconnected

frombasic call

basic callcleared

frombasic call

SERVICE 3resp.conf

N1 := 16

SET (NOW + 10s,Replenishment)

flow control:= false

UUS3Active

true

false

Figure 18 (sheet 2 of 3)

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Page 50ETR 285: March 1996

Process FE3_UUS3 Page_3(3)

UUS3Active

Replenishment

N1 := N1 + 8

NI >= 16

SET (NOW + 10s,Replenishment)

Flow control:= false

FLOW CONTROLreq.ind(off)

UUS3Active

rc

N1 := 16

Basic callreleared

tobasiccall

DATA UNITreq.ind rb

DATA UNITreq.ind rc

UUS3Active

DATA UNITreq.ind(data)

N1 > 0

Discard(data)

Congestion

UUS3Active

Flow control := true

FLOW CONTROLreq.ind(on)

UUS3Active

rc

N1 := N1 - 1

DATA UNITreq.ind

UUS3Active

rb

rc

NoYes

Yes

No

Yes

No

Figure 18 (sheet 3 of 3)

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Page 51ETR 285: March 1996

8.4 SDL diagrams for FE4

The SDL diagrams for FE4 are shown in figures 19, 20 and 21.

8.4.1 Service 1

Process FE4_UUS1 Page_1(3)

Clear-on-fail: = false

UUS1Idle

DATA UNITreq.ind

SERVICE 1req.

UUS1Active

user

rc

SERVICE 1req.ind(data) (form)

form

SERVICE 1req. user

UUS1Requested

Clear-on-fail: = true

rc

required

preferred

Figure 19 (sheet 1 of 3)

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Page 52ETR 285: March 1996

Process FE4_UUS1 Page_2(3)

UUS1Requested

basic callcleared from basic call

SERVICE1REJECTind.

reason : ="rejected by user"

SERVICE 1REJECTreq.ind(reason)

Clear on fail

Clear basic call to basic call

rc

userSERVICE 1resp.

"include data in response"

SERVICE 1resp.conf(data)

rc

UUS1Active

data :="required UUI data"

user

FALSE

TRUE

YES

NO

Figure 19 (sheet 2 of 3)

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Page 53ETR 285: March 1996

Process FE4_UUS1 Page_3(3)

UUS1Active

basic callclearing from basic call

DATA UNITreq. ind.(data)

DATA UNITind. user

UUS1Active

rcDATA UNITreq.

"Data : ="requested data"

DATA UNITreq.ind(data)

UUS1Active

rc

user

Figure 19 (sheet 3 of 3)

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Page 54ETR 285: March 1996

8.4.2 Service 2

Process FE4_UUS2 Page_1(3)

Clear-on-fail: = false

UUS2Idle

SERVICE 2req.ind(data) (form)

form

SERVICE 2req.(data)

UUS2Requested

user

Clear-on-fail: = true

rc

preferred

required

Figure 20 (sheet 1 of 3)

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Page 55ETR 285: March 1996

Process FE4_UUS2 Page_2(3)

UUS2Requested

basic callclearing from basic call

SERVICE 2REJECTind.

reason : ="rejected by

user"

SERVICE 2REJECTreq.ind(reason)

rc

Clear on fail

Clear basic call to basic call

userSERVICE 2resp.

SERVICE 2resp.conf(data)

UUS2Active

rc

user

TRUE

FALSE

Figure 20 (sheet 2 of 3)

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Page 56ETR 285: March 1996

Process FE4_UUS2 Page_3(3)

UUS2Active

basic callconnectedfrom basic call

basic callclearing from basic call

DATA UNITreq.ind(data)

DATA UNITind. user

UUS2Active

rcDATA UNITreq.

Data :="requested UU1 data"

DATA UNITreq.ind(data)

UUS2Active

rc

user

Figure 20 (sheet 3 of 3)

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Page 57ETR 285: March 1996

8.4.3 Service 3

Process FE4_UUS3 Page_1(3)

Clear-on-fail: = false

UUS3Idle

SERVICE 3req.ind(data) (form)

form

SERVICE 3req.(data)

UUS3Requested

user

Clear-on-fail: = true

rc

required

preferred

Figure 21 (sheet 1 of 3)

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Page 58ETR 285: March 1996

Process FE4_UUS3 Page_2(3)

UUS3Requested

basic callcleared from basic call

SERVICE 3REJECTind.

reason : =rejected by user

SERVICE 3REJECTreq.ind(reason)

Clear-on-fail

Clear basic call to basic call

rc

userSERVICE 3resp.

SERVICE 3resp.conf(data)

UUS3Active

rc

user

TRUE

FALSE

Figure 21 (sheet 2 of 3)

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Page 59ETR 285: March 1996

Process FE4_UUS3 Page_3(3)

UUS3Active

basic callcleared from basic call

DATA UNITreq.ind(data)

DATA UNITind. user

UUS3Active

rc

DATA UNITreq. user

Data : ="requested data"

DATA UNITreq.ind(data)

UUS3Active

rc

Figure 21 (sheet 3 of 3)

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Page 60ETR 285: March 1996

9 Functional Entity Actions (FEAs)

9.1 FEAs of FE1

911: Service request for UUS services.

912: Handling of explicit or implicit UUS service 1.

913: Handling of UUS service 2.

914: Handling of UUS service 3.

9.2 FEAs of FE2

921: Service request for UUS services.

922: Handling of explicit or implicit UUS service 1.

923: Handling of UUS service 2.

924: Handling of UUS service 3.

925: Flow control for UUS service 3.

9.3 FEAs of FE3

931: Service request for UUS services.

932: Handling of explicit or implicit UUS service 1.

933: Handling of UUS service 2.

934: Handling of UUS service 3.

935: Flow control for UUS service 3.

936: Subsequent DATA UNIT req.ind information flows received from other FE4safter the first DATA UNIT req.ind information flow are discarded and no action istaken.

9.4 FEAs of FE4

941: Service request for UUS services.

942: Handling of explicit or implicit UUS service 1.

943: Handling of UUS service 2.

944: Handling of UUS service 3.

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Page 61ETR 285: March 1996

10 Allocation of functional entities to physical locations

The allocation of functional entities to physical locations is shown in table 12.

Table 12

Scenario FE1 FE2 FE3 FE4Scenario 1 Orig. TE Orig. LE Dest. LE Dest TEScenario 2 Orig. TE Orig. PTNX Dest. LE Dest TEScenario 3 Orig. TE Orig. LE Dest. PTNX Dest TEScenario 4 Orig. TE Orig. PTNX Dest. PTNX Dest TEScenario 5 Dest. TE Dest. LE Orig. LE Orig. TEScenario 6 Dest. TE Dest. PTNX Orig. LE Orig. TEScenario 7 Dest. TE Dest. LE Orig. PTNX Orig. TEScenario 8 Dest. TE Dest. PTNX Orig. PTNX Orig. TE

NOTE: Scenarios 5, 6, 7 and 8 are only applicable for service 3 of the UUSsupplementary service when the network provides the option of thecalled user requesting the service in the active state.

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Page 62ETR 285: March 1996

History

Document history

March 1996 First Edition

ISBN 2-7437-0549-3Dépôt légal : Mars 1996