ETSI EN 300 392-10-11 V1.3.1 (2004-01)

Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 11: Call Waiting (CW)

REN/TETRA-03094

Prizemni snopovni radio (TETRA) – Govor in podatki (V+D) – 10. del: Dopolnilne storitve stopnje 1 – 11. poddel: Čakajoči klic (CW)

General Information

• Status: Published
• Publication Date: 04-Jan-2004
• Technical Committee: TCCE 3 - TCCE Air Interface and Network Protocols
• Current Stage: 12 - Completion
• Due Date: 02-Jan-2004
• Completion Date: 05-Jan-2004
• Mandate: T-172-1A
• Ref Project: SIST EN 300 392-10-11 V1.3.1:2006 - Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 11: Call Waiting (CW)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 11: Call Waiting (CW)33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 392-10-11 Version 1.3.1SIST EN 300 392-10-11 V1.3.1:2006en01-april-2006SIST EN 300 392-10-11 V1.3.1:2006SLOVENSKI
STANDARD



SIST EN 300 392-10-11 V1.3.1:2006



ETSI EN 300 392-10-11 V1.3.1 (2004-01)European Standard (Telecommunications series) Terrestrial Trunked Radio (TETRA);Voice plus Data (V+D);Part 10: Supplementary services stage 1;Sub-part 11: Call Waiting (CW)
SIST EN 300 392-10-11 V1.3.1:2006



ETSI ETSI EN 300 392-10-11 V1.3.1 (2004-01) 2
Reference REN/TETRA-03094 Keywords CW, data, radio, speech, stage 1, supplementary service, TETRA ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2004. All rights reserved.
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ETSI ETSI EN 300 392-10-11 V1.3.1 (2004-01) 3
Contents Intellectual Property Rights.5 Foreword.5 1 Scope.7 2 References.7 3 Definitions and abbreviations.7 3.1 Definitions.7 3.2 Abbreviations.8 3.2.1 General abbreviations.8 3.2.2 Supplementary service abbreviations.8 4 SS-CW stage 1 specification.9 4.1 Description.9 4.1.1 General description.9 4.1.2 Qualifications on applicability to telecommunication services.9 4.2 Procedures.9 4.2.1 Provision/withdrawal.9 4.2.2 Normal procedures.9 4.2.2.1 Activation, deactivation, definition, registration, interrogation and cancellation.9 4.2.2.1.1 Activation/Deactivation.9 4.2.2.1.2 Definition.9 4.2.2.1.3 Registration.9 4.2.2.1.4 Interrogation.9 4.2.2.1.5 Cancellation.10 4.2.2.2 Invocation.10 4.2.2.3 Operation.10 4.2.3 Exceptional procedures.11 4.2.3.1 Activation, deactivation, definition, registration, interrogation and cancellation.11 4.2.3.1.1 Activation/Deactivation.11 4.2.3.1.2 Definition.11 4.2.3.1.3 Registration.11 4.2.3.1.4 Interrogation.11 4.2.3.1.5 Cancellation.11 4.2.3.2 Invocation and operation.11 4.2.3.2.1 Invocation.11 4.2.3.2.2 Operation.12 4.2.4 Protocol timer.13 4.3 Interactions with other supplementary services.13 4.3.1 Calling Line Identification Presentation.13 4.3.2 Calling/Connected Line Identification Restriction.13 4.3.3 Connected Line Identification Presentation.13 4.3.4 Call Report.13 4.3.5 Talking Party Identification.13 4.3.6 Call Forwarding Unconditional (SS-CFU).13 4.3.7 Call Forwarding On Busy (SS-CFB).14 4.3.8 Call Forwarding on No Reply (SS-CFNRy).14 4.3.9 Call Forwarding on Not Reachable (SS-CFNRc).14 4.3.10 List Search Call (LSC).15 4.3.11 Call Authorized by Dispatcher (CAD).15 4.3.12 Short Number Addressing (SNA).15 4.3.13 Area Selection (AS).15 4.3.14 Access Priority (AP).15 4.3.15 Priority Call (PC).15 4.3.16 Call Hold (HOLD).15 4.3.17 Call Completion to Busy Subscriber (CCBS).16 4.3.18 Late Entry (LE).16 SIST EN 300 392-10-11 V1.3.1:2006



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4.3.19 Transfer of Control (TC).16 4.3.20 Pre-emptive Priority Call (PPC).16 4.3.21 Include Call (IC).16 4.3.22 Advice of Charge (AC).16 4.3.23 Barring of Outgoing Calls (BOC).16 4.3.24 Barring of Incoming Calls (BIC).16 4.3.25 Discreet Listening (DL).17 4.3.26 Ambience Listening (AL).17 4.3.27 Dynamic Group Number Assignment (DGNA).17 4.3.28 Call Completion on No Reply (CCNR).17 4.3.29 Call Retention (CRT).17 4.4 Inter-working considerations.17 4.4.1 Inter-working between different TETRA networks.17 4.4.2 Inter-working with external networks.18 4.5 Overall SDL.18 Annex A (informative): Bibliography.22 Annex B (informative): Change Requests.23 History.24
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Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Project Terrestrial Trunked Radio (TETRA). The present document is part 10, sub-part 11 of a multi-part deliverable covering the Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D), as identified below: EN 300 392-1: "General network design"; EN 300 392-2: "Air Interface (AI)"; EN 300 392-3: "Interworking at the Inter-System Interface (ISI)"; ETS 300 392-4: "Gateways basic operation"; EN 300 392-5: "Peripheral Equipment Interface (PEI)"; EN 300 392-7: "Security"; EN 300 392-9: "General requirements for supplementary services"; EN 300 392-10: "Supplementary services stage 1"; EN 300 392-10-1: "Call Identification (CI)"; ETS 300 392-10-2: "Call report"; ETS 300 392-10-3: "Talking Party Identification (TPI)"; EN 300 392-10-4: "Call Forwarding (CF)"; ETS 300 392-10-5: "List Search Call (LSC)"; EN 300 392-10-6: "Call Authorized by Dispatcher (CAD)"; ETS 300 392-10-7: "Short number addressing"; EN 300 392-10-8: "Area Selection (AS)"; ETS 300 392-10-9: "Access priority"; EN 300 392-10-10: "Priority Call (PC)"; EN 300 392-10-11: "Call Waiting (CW)"; EN 300 392-10-12: "Call Hold (HOLD)"; ETS 300 392-10-13: "Call completion to busy subscriber"; EN 300 392-10-14: "Late Entry (LE)"; SIST EN 300 392-10-11 V1.3.1:2006



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ETS 300 392-10-15: "Transfer of control"; ETS 300 392-10-16: "Pre-emptive Priority Call (PC)"; EN 300 392-10-17: "Include Call (IC)"; EN 300 392-10-18: "Barring of Outgoing Calls (BOC)"; EN 300 392-10-19: "Barring of Incoming Calls (BIC)"; ETS 300 392-10-20: "Discreet Listening (DL)"; EN 300 392-10-21: "Ambience Listening (AL)"; EN 300 392-10-22: "Dynamic Group Number Assignment (DGNA)"; ETS 300 392-10-23: "Call completion on no reply"; ETS 300 392-10-24: "Call Retention (CRT)"; EN 300 392-11: "Supplementary services stage 2"; EN 300 392-12: "Supplementary services stage 3"; ETS 300 392-13: "SDL model of the Air Interface (AI)"; ETS 300 392-14: "Protocol Implementation Conformance Statement (PICS) proforma specification"; TS 100 392-15: "TETRA frequency bands, duplex spacing and channel numbering"; TS 100 392-16: "Network Performance Metrics"; TS 100 392-17: "TETRA V+D and DMO Release 1.1 specifications".
National transposition dates Date of adoption of this EN: 19 December 2003 Date of latest announcement of this EN (doa): 31 March 2004 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 September 2004 Date of withdrawal of any conflicting National Standard (dow): 30 September 2004
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1 Scope The present document defines the stage 1 description of the call waiting supplementary service (SS-CW) for the Terrestrial Trunked Radio (TETRA) as provided by European operators. The stage 1 description is an overall service description from the user point of view but does not deal with the details of the human interface itself (see ITU-T Recommendation I.130 [1]). SS-CW permits a called user to acknowledge an incoming individual call while he is already busy. Subsequently that user shall have the choice to accept, reject or ignore that incoming call. The present document specifies the service description of the supplementary service and the procedures to be expected with successful and unsuccessful outcomes. In addition the present document specifies the interactions with other TETRA supplementary services and inter-working considerations. Charging principles are outside the scope of the present document. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. [1] ITU-T Recommendation I.130: "Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN". [2] ITU-T Recommendation Z.100: "Specification and Description Language (SDL)". [3] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air Interface (AI)". [4] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 9: General requirements for supplementary services". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in EN 300 392-9 [4] and the following apply: busy: served user state in which no more a new call can be offered to him NOTE 1: In the present document busy is only applicable for individual calls. NOTE 2: If the user MS supports concurrent calls, then busy is defined independently for each basic service. served user: user who may invoke the supplementary service (i.e. acknowledge an incoming individual while he is busy, instead of clearing it) SIST EN 300 392-10-11 V1.3.1:2006



ETSI ETSI EN 300 392-10-11 V1.3.1 (2004-01) 8
timer T2: measures the waiting time for the offered call from user C to be either accepted or cleared by the served user B after SS-CW has been invoked user A: user engaged in an individual call with the served user (this call can be in any state) NOTE: If the served user is engaged in a group call when he receives an incoming individual call, then user A may be any of the other participants in that group call. user B: served user who has activated SS-CW and may invoke it user C: user who has originated an individual call to the served user while that served user is busy (i.e. the served user may invoke the call waiting supplementary service for the call from user C). 3.2 Abbreviations 3.2.1 General abbreviations For the purposes of the present document, the following general abbreviations apply: ISDN Integrated Services Digital Network MS Mobile Station NDUB Network Determined User Busy SDL (Functional) Specification and Description Language SS Supplementary Service NOTE: The abbreviation SS is only used when referring to a specific supplementary service. 3.2.2 Supplementary service abbreviations For the purposes of the present document, the following supplementary service abbreviations apply: AC Advice of Charghe AL Ambience Listening AP Access Priority AS Area Selection BIC Barring of Incoming Calls BOC Barring of Outgoing Calls CAD Call Authorized by Dispatcher CCBS Call Completion to Busy Subscriber CCNR Call Completion on No Reply CFB Call Forwarding on Busy CFNRc Call Forwarding on Not Reachable CFNRy Call Forwarding on No Reply CFU Call Forwarding Unconditional CRT Call Retention CW Call Waiting DGNA Dynamic Group Number Assignment DL Discreet Listening HOLD Call Hold IC Include Call LSC List Search Call PC Priority Call PPC Pre-emptive Priority Call SNA Short Authorized by Dispatcher TC Transfert of Control SIST EN 300 392-10-11 V1.3.1:2006



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4 SS-CW stage 1 specification 4.1 Description 4.1.1 General description SS-CW permits a called user to acknowledge an incoming individual call while he is already busy. That call shall then be qualified as a waiting call. Subsequently that user shall have the choice to accept, reject or ignore the waiting call. 4.1.2 Qualifications on applicability to telecommunication services This supplementary service shall be applicable to all circuit mode individual teleservices and bearer services. 4.2 Procedures 4.2.1 Provision/withdrawal The provision of SS-CW shall be on a per individual subscriber basis, or as a network option general for all (TETRA) individual subscribers. The corresponding subscriptions shall be valid for all basic services for which SS-CW applies (see clause 4.1.2). The supplementary service shall be withdrawn by the service provider: - for administrative purposes; or - at the request of the served user, if individually provided. No specific information shall then be given to the subscribers by the network. 4.2.2 Normal procedures 4.2.2.1 Activation, deactivation, definition, registration, interrogation and cancellation 4.2.2.1.1 Activation/Deactivation The CW supplementary service shall be activated by the service provider upon provision. The CW supplementary service shall be deactivated by the service provider upon withdrawal. The served user should also be able to activate/deactivate the service after provision. 4.2.2.1.2 Definition Not applicable. 4.2.2.1.3 Registration Not applicable. 4.2.2.1.4 Interrogation Not applicable. SIST EN 300 392-10-11 V1.3.1:2006



ETSI ETSI EN 300 392-10-11 V1.3.1 (2004-01) 10 4.2.2.1.5 Cancellation Not applicable. 4.2.2.2 Invocation If SS-CW has been activated for the served user, when a new individual call is addressed to that user and the network has determined that such user is already engaged in a call (i.e. that user is then in the busy state whether he participates in an individual call or in a group call), the network shall offer that call to him unless it has already reached the maximum number of such additional calls. NOTE 1: In ISDN, the case just addressed (where the network cannot present a new additional call when the called user is busy) is one of those corresponding to the situation defined as "Network Determined User Busy" (NDUB). When the served user is offered such incoming individual call (from user C) while being busy, he shall be able to invoke SS-CW. He shall do so in sending a positive response to the offered call within the same predefined period of time as for sending a basic call response. The same shall apply if the network offers a new incoming individual call to the served user without knowing that he is in the busy state. NOTE 2: The served user may be in the busy state without the network knowing it when the served user participates in a group call. The served user may be able to invoke SS-CW for more than one incoming individual call. However the maximum number of waiting calls at any one time per busy subscriber shall be a network option, and it is recommended that that maximum number be one. 4.2.2.3 Operation When the called user has invoked SS-CW for a call (incoming individual): - if the current value of the basic call timer T302 (see clause 14.6 of EN 300 392-2 [3]) in the served user MS is expected to be less than T2, then it should be set to a value larger than T2; - the network shall apply the individual basic call procedure for informing user C that: - the basic call hook selection is on/hook off signalling; - the called user has been offered the call. - in addition the network shall notify user C that SS-CW has been invoked for his call. If the served user is participating in an individual call, with user A, he should free resources (i.e. especially air interface resources in the case of a MS) before requesting the network to connect the waiting call from user C. To do so, either: - he or user A shall clear the (active) individual call; or - he shall invoke the call hold individual supplementary service. If the served user is participating in a group call without being the call owner, according to the group call procedures, he will be able to immediately leave that call and answer the waiting call without affecting the ongoing group call. If he is the call owner, it is an implementation matter whether he will be able to immediately leave the group call to answer the waiting call without first having first either cleared the group call or transferred its control to another group member, using the supplementary service transfer of control. To accept a waiting call (after having freed resources following the above recommendation if the active call was an individual call), the served user shall use the basic call procedure. Any previous waiting indication to the served user should then be removed in the served user MS. SIST EN 300 392-10-11 V1.3.1:2006



ETSI ETSI EN 300 392-10-11 V1.3.1 (2004-01) 11 If the served user has invoked SS-CW for more than one call, he shall be able to accept any such waiting call, unless that call has been cleared in the meantime. The network shall connect that call: - if the served user has not changed location since he has invoked SS-CW for that call; or - if the served user has changed location since he has invoked SS-CW for that call and both his terminal equipment and the network support the optional SS-CW location change procedure. NOTE 1: See clause 4.2.3.2 for the case where the network cannot satisfy the request because the served user has changed location since he has invoked SS-CW for the call and the network does not support the SS-CW location change procedure. NOTE 2: If user C changes location while the call is waiting, the call restoration procedure for basic call may apply. 4.2.3 Exceptional procedures 4.2.3.1 Activation, deactivation, definition, registration, interrogation and cancellation 4.2.3.1.1 Activation/Deactivation The served user activation request may fail when SS-CW has not been subscribed for that user. The network shall then indicate such failure to the served user in giving him the corresponding reason. 4.2.3.1.2 Definition Not applicable. 4.2.3.1.3 Registration Not applicable. 4.2.3.1.4 Interrogation Not applicable. 4.2.3.1.5 Cancellation Not applicable. 4.2.3.2 Invocation and operation 4.2.3.2.1 Invocation The following exceptional procedures shall apply for SS-CW invocation. NOTE: The case where the network does not receive any response from the served user after it has offered a new incoming call to him within a predefined period of time is part of basic call exceptional procedures and not of SS-CW exceptional procedures. 4.2.3.2.1.1 Maximum number of waiting calls reached If the served user invokes SS-CW for a new incoming call when the number of calls which he still has in the call waiting state is equal to the maximum number of such calls (see clause 4.2.2.2), the network shall reject that invocation in informing the served user about such rejection and giving him the corresponding cause. The network shall then clear the call with the disconnect cause: called party busy. SIST EN 300 392-10-11 V1.3.1:2006



ETSI ETSI EN 300 392-10-11 V1.3.1 (2004-01) 12 NOTE: The above situation may only arise if the maximum number of calls which can be waiting is less than the maximum number of additional calls that the network can offer to the served user. Otherwise (see clause 4.2.2.2), no new call will be presented to the served user in that situation - and therefore no SS-CW invocation for that call can be received from the served user. 4.2.3.2.1.2 SS-CW deactivated When the served user (for whom SS-CW has been subscribed) has deactivated SS-CW: - first the network should avoid presenting new incoming individual calls to that user when it knows that he is busy; - second if the network presents such new calls (e.g. when the called user is busy because he participates in a g
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