SIST EN 300 392-10-16 V1.3.1:2006

• Abstract:

  Addition of SS-CAD and SS-PPC interaction options.

• Status: Published
• Publication Date: 31-Oct-2006
• ICS: 33.070.10 - Terrestrial Trunked Radio (TETRA)
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Nov-2006
• Due Date: 01-Nov-2006
• Completion Date: 01-Nov-2006
• Mandate: T-172-1A
• Ref Project: ETSI EN 300 392-10-16 V1.3.1 (2006-08) - Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 16: Pre-emptive Priority Call (PPC)

SIST EN 300 392-10-16 V1.3.1:2006 is the Slovenian adoption of the ETSI European Standard for Terrestrial Trunked Radio (TETRA) Voice plus Data supplementary services. It specifies the stage 1 service behaviour of Pre-emptive Priority Call (PPC), including how a higher-priority call can obtain resources or interrupt an existing call. It is written for TETRA service providers, network and terminal implementers, and anyone defining or testing SS-PPC behaviour in a Switching and Management Infrastructure (SwMI).

What does SIST EN 300 392-10-16 V1.3.1:2006 specify?

SIST EN 300 392-10-16 V1.3.1:2006 defines the user-level specification of Supplementary Service Pre-emptive Priority Call (SS-PPC) for TETRA Voice plus Data. It describes what the service does, how it is provisioned and invoked, how failures are reported, and how it interacts with other TETRA supplementary services.

The scope explicitly includes service description, successful and unsuccessful procedures, interactions with other supplementary services, and interworking considerations. Charging principles are outside the scope.

The document is organized into a short set of clauses plus two informative annexes.

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definitions and abbreviations
• Clause 4 - SS-PPC stage 1 specification, including description, procedures, interactions, interworking considerations, and overall SDL
• Annex A - Bibliography
• Annex B - Change requests

What are the key requirements of SIST EN 300 392-10-16 V1.3.1:2006?

SS-PPC priority and pre-emption

SIST EN 300 392-10-16 V1.3.1:2006 makes SS-PPC a priority service that can displace lower-priority calls when resources are needed. In practice, that means the network may release older calls with lower Call ReTention Value (CRV) so the pre-emptive call can proceed.

Clause 4.1.1.2 also covers called user pre-emption. If the destination is already engaged, the incoming SS-PPC call may interrupt the existing call unless the established call has a sufficiently high priority. The document also describes two options for when the mobile station application decides whether to accept the new call.

Where the service applies

Clause 4.1.2 limits SS-PPC to individual and group TETRA teleservices and bearer services. It does not apply to TETRA packet data services or Short Data Service (SDS). For implementers, this means SS-PPC handling belongs in voice and bearer call control, not in packet or SDS behaviour.

Provisioning and subscription

Clause 4.2.1 states that SS-PPC is provided and withdrawn by arrangement with the service provider, on a per TETRA number basis. The subscription can apply to all or only some subscribed basic services for a given identity. Table 3 defines the key subscription choices: whether immediate pre-emption is required and, if not, the time to pre-emption.

Activation, interrogation, and cancellation

Clause 4.2.2.1 says SS-PPC is activated by the service provider, with optional activation and deactivation support as part of definition. Registration does not apply. Interrogation may be local, remote, or both, and returns the activation state and priority value; remote interrogation also returns delivery state and whether acknowledgement is requested. Cancellation can be supported for authorized users.

Invocation, warning, and failure handling

Clauses 4.2.2.2.1 to 4.2.3.2 describe what happens at call set-up. If traffic channels are not available, the network should release a lower-priority call so the SS-PPC call can be established. If pre-emption indication is subscribed to, the connected parties receive a warning before release; if immediate pre-emption is subscribed to, the warning is skipped.

The document also lists rejection causes, such as lack of authorization, invalid parameters, unknown identity, congestion, or resources already protected by high-CRV pre-emptive calls. This matters for troubleshooting and for user-facing failure messages.

Interactions with other supplementary services

Clause 4.3 sets the interaction rules with other supplementary services. SS-PPC takes precedence over Priority Call (SS-PC), over Call Forwarding on Busy (SS-CFB), and it has no interaction with many others such as SS-CLIP, SS-COLP, SS-CLIR, SS-CR, SS-TPI, SS-CFU, SS-CFNRy, SS-CFNRc, SS-LSC, SS-SNA, SS-AS, SS-AP, SS-LE, SS-IC, SS-BOC, SS-BIC, SS-DGNA, SS-CCNR, and SS-CRT under the stated conditions. Clause 4.3.11 adds the SS-CAD interaction options, which is the main update highlighted in the scope.

What terms does SIST EN 300 392-10-16 V1.3.1:2006 define?

• Access Priority Level (APL) - the value used at initial call set-up to determine priority access across the air interface.
• Call ReTention Value (CRV) - the value used to decide how strongly an established call is protected against pre-emption.
• Pre-emptive Priority Level (PPL) - the value used to allocate resources to an SS-PPC call.
• Priority Level (PL) - the value used to determine access priority when the network is congested.
• SwMI - Switching and Management Infrastructure, the TETRA network infrastructure that controls call handling.
• served user - the user making the SS-PPC call.
• SS-PPC call - a call with a pre-emptive priority value.
• time to pre-emption - the selected delay between warning and forced connection change.

Who uses SIST EN 300 392-10-16 V1.3.1:2006?

SIST EN 300 392-10-16 V1.3.1:2006 is used by TETRA network operators and service providers when they define priority behaviour and subscriber options. It is also used by SwMI designers, mobile station and terminal implementers, and test engineers who need to verify call set-up, pre-emption, warning indications, and interactions with other supplementary services.

It is relevant to dispatcher-oriented systems as well, because the document includes interactions with Call Authorized by Dispatcher (SS-CAD), Discreet Listening (SS-DL), and Ambience Listening (SS-AL).

What changed in SIST EN 300 392-10-16 V1.3.1:2006 from the previous edition?

SIST EN 300 392-10-16 V1.3.1:2006 updates the V1.3.0 edition published in April 2006. The change-request record shows a new update for interaction with SS-CAD, and the annex also records earlier update topics such as emergency call user pre-emption, SS-HOLD and group calls, SwMI behaviour on call pre-emption, and alignment with stage 3 functions and PDU information elements.

Which standards are used with SIST EN 300 392-10-16 V1.3.1:2006?

• ITU-T Recommendation I.221 - provides the general service characteristic used for the definition of busy.
• ITU-T Recommendation Z.100 - provides the Specification and Description Language (SDL) used for the overall behaviour model.
• ETSI ETS 300 392-10-24 / EN 300 392-10-24 - defines Call ReTention (CRT), which SS-PPC uses when deciding which established call to release.
• ETSI EN 300 392-10-6 - defines Call Authorized by Dispatcher (SS-CAD), including the interaction options referenced for SS-PPC.

What does the SIST EN 300 392-10-16 V1.3.1:2006 document contain?

The document contains the service description, procedural rules, interaction rules, interworking considerations, and an overall SDL model of SS-PPC. It also includes tables for pre-emption priority options, subscription options, and change requests, which are useful when configuring or testing network behaviour.

Figure 1 gives the SDL view of the SS-PPC state and call-handling behaviour. Annex A lists bibliography material, and Annex B records the change requests behind the current version.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prizemni snopovni radio (TETRA) – Govor in podatki (V+D) – 10. del: Dopolnilne storitve stopnje 1 – 16. poddel: Prednostni klic s predpravico (PPC)Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 16: Pre-emptive Priority Call (PPC)33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 392-10-16 Version 1.3.1SIST EN 300 392-10-16 V1.3.1:2006en01-november-2006SIST EN 300 392-10-16 V1.3.1:2006SLOVENSKI
STANDARD
ETSI ETSI EN 300 392-10-16 V1.3.1 (2006-08) 2
Reference REN/TETRA-03172 Keywords air interface, V+D, data, priority call, radio, speech, stage 1, TETRA, supplementary service ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp 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 2006. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 300 392-10-16 V1.3.1:2006

ETSI ETSI EN 300 392-10-16 V1.3.1 (2006-08) 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 Supplementary Service Pre-emptive Priority Call (SS-PPC) stage 1 specification.9 4.1 Description.9 4.1.1 General description.9 4.1.1.1 Resource pre-emption.9 4.1.1.2 Called user pre-emption.10 4.1.2 Qualifications on applicability to telecommunication services.10 4.2 Procedures.11 4.2.1 Provision and withdrawal.11 4.2.2 Normal procedures.11 4.2.2.1 Activation, deactivation, definition, registration, interrogation and cancellation.11 4.2.2.1.1 Activation and deactivation.11 4.2.2.1.2 Definition.11 4.2.2.1.3 Registration.11 4.2.2.1.4 Interrogation.11 4.2.2.1.5 Cancellation.11 4.2.2.2 Invocation and operation.12 4.2.2.2.1 General on invocation and operation.12 4.2.2.2.2 Pre-empting individual call set-up.12 4.2.2.2.3 Pre-empting group call set-up.13 4.2.3 Exceptional procedures.13 4.2.3.1 Activation, deactivation, definition, registration, interrogation and cancellation.13 4.2.3.1.1 Activation and deactivation.13 4.2.3.1.2 Definition.13 4.2.3.1.3 Registration.13 4.2.3.1.4 Interrogation.14 4.2.3.1.5 Cancellation.14 4.2.3.2 Invocation and operation.14 4.3 Interactions with other supplementary services.14 4.3.1 Calling Line Identification Presentation (SS-CLIP).14 4.3.2 COnnected Line identification Presentation (SS-COLP).14 4.3.3 Calling/Connected Line Identification Restriction (SS-CLIR).15 4.3.4 Call Report (SS-CR).15 4.3.5 Talking Party Identification (SS-TPI).15 4.3.6 Call Forwarding Unconditional (SS-CFU).15 4.3.7 Call Forwarding on Busy (SS-CFB).15 4.3.8 Call Forwarding on No Reply (SS-CFNRy).15 4.3.9 Call Forwarding on Not Reachable (SS-CFNRc).15 4.3.10 List Search Call (SS-LSC).15 4.3.11 Call Authorized by Dispatcher (SS-CAD).15 4.3.12 Short Number Addressing (SS-SNA).15 4.3.13 Area Selection (SS-AS).16 4.3.14 Access Priority (SS-AP).16 4.3.15 Priority Call (SS-PC).16 4.3.16 Call Waiting (SS-CW).16 4.3.17 Call Hold (SS-HOLD).16 SIST EN 300 392-10-16 V1.3.1:2006

ETSI ETSI EN 300 392-10-16 V1.3.1 (2006-08) 4
4.3.18 Call Completion on Busy Subscriber (SS-CCBS).16 4.3.19 Late Entry (SS-LE).16 4.3.20 Pre-emptive Priority Call (SS-PPC).16 4.3.21 Include Call (SS-IC).16 4.3.22 Barring of Outgoing Calls (SS-BOC).17 4.3.23 Barring of Incoming Calls (SS-BIC).17 4.3.24 Discreet Listening (SS-DL).17 4.3.25 Ambience Listening (SS-AL).17 4.3.26 Dynamic Group Number Assignment (SS-DGNA).17 4.3.27 Call Completion on No Reply (SS-CCNR).17 4.3.28 Call ReTention (SS-CRT).17 4.4 Interworking considerations.17 4.5 Overall SDL.18 Annex A (informative): Bibliography.21 Annex B (informative): Change requests.22 History.23
ETSI ETSI EN 300 392-10-16 V1.3.1 (2006-08) 5
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 Technical Committee Terrestrial Trunked Radio (TETRA). The present document is part 10, sub-part 16 of a multi-part deliverable covering 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 300 392-10-16 V1.3.1:2006

ETSI ETSI EN 300 392-10-16 V1.3.1 (2006-08) 6
ETS 300 392-10-15: "Transfer of control"; EN 300 392-10-16: "Pre-emptive Priority Call (PPC)"; 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 spacings and channel numbering"; TS 100 392-16: "Network Performance Metrics"; TR 100 392-17: "TETRA V+D and DMO specifications"; TS 100 392-18: "Air interface optimized applications". NOTE: Part 10, sub-part 15 (Transfer of control), part 13 (SDL) and part 14 (PICS) of this multi-part deliverable are in status "historical" and are not maintained.
National transposition dates Date of adoption of this EN: 18 August 2006 Date of latest announcement of this EN (doa): 30 November 2006 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 May 2007 Date of withdrawal of any conflicting National Standard (dow): 31 May 2007
ETSI ETSI EN 300 392-10-16 V1.3.1 (2006-08) 7
1 Scope The present document defines the stage 1 specifications of the Supplementary Service Pre-emptive Priority Call (SS-PPC) for the Terrestrial Trunked Radio system (TETRA). Stage 1 is an overall service description from the users point of view but does not deal with the details of the human interface itself. 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 interworking considerations. Charging principles are outside the scope of the present document. The SS-PPC enables a user to have preferential access to SwMI resources including pre-emption of calls. 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.221: "Common specific characteristics of services". [2] ITU-T Recommendation Z.100: "Specification and Description Language (SDL)". [3] ETSI ETS 300 392-10-24: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 24: Call Retention (CRT)". [4] ETSI EN 300 392-10-6: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 6: Call Authorized by Dispatcher (CAD)". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: Access Priority Level (APL): value allocated to each mobile Individual TETRA Subscriber Identity (ITSI)/Group TETRA Subscriber Identity (GTSI)/Call type that is used at the initial call set-up attempt to determine priority access across the air interface to the control functional entities busy: property of a user for whom a network determined user busy or user determined user busy condition applies NOTE: See ITU-T Recommendation I.221 [1]. Call Retention Value (CRV): call retention priority is a network option which defines the relative level of protection of the established call against the probability of having the resources pre-empted established call: call between User B and C upon which the pre-emption request is made SIST EN 300 392-10-16 V1.3.1:2006

ETSI ETSI EN 300 392-10-16 V1.3.1 (2006-08) 8
impending pre-emption warning indication: warning provided before a pre-emption of the call is established Pre-emptive Priority Level (PPL): pre-agreed value allocated to each mobile ITSI/GTSI/Call type that is used so that resources may be allocated to the SS-PPC pre-emptive state: call connection condition between the time the pre-emptive call is established by the network and the ending of the pre-emptive call, e.g. by the served user clearing Priority Level (PL): pre-agreed value allocated to each mobile ITSI/GTSI/Call type that is used to determine priority access to network resources in the event of network congestion resource: all radio and network infrastructure facilities used for an established call NOTE: Typical resource that SwMI releases due to pre-emption is allocated timeslots for an existing call. Also other resources such as links between base stations and exchange or links between SwMIs may be released.
served user: user A making the SS-PPC to user B SS-PPC call: call with a pre-emptive priority value time to pre-emption: selected time period between provision of warning of impending intrusion indication and establishment of the connection 3.2 Abbreviations 3.2.1 General abbreviations For the purposes of the present document, the following general abbreviations apply: APL Access Priority Level CRV Call Retention Value CSA Called Subscriber Answer GTSI Group TETRA Subscriber Identity I/F Interface ITSI Individual TETRA Subscriber Identity MS Mobile Station PL Priority Level PPL Pre-emptive Priority Level SDL (Functional) Specification and Description Language SDS Short Data Service SS Supplementary Service NOTE: The abbreviation SS is only used when referring to a specific supplementary service. SwMI Switching and Management Infrastructure 3.2.2 Supplementary Service abbreviations For the purposes of the present document, the following supplementary service abbreviations apply: SS-AL Ambience Listening SS-AP Access Priority SS-AS Area Selection SS-BIC Barring of Incoming Calls SS-BOC Barring of Outgoing Calls SS-CAD Call Authorized by Dispatcher SS-CCBS Call Completion to Busy Subscriber SS-CCNR Call Completion on No Reply SS-CFB Call Forwarding on Busy SS-CFNRy Call Forwarding on No Reply SS-CFNRc Call Forwarding on Not Reachable SIST EN 300 392-10-16 V1.3.1:2006

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SS-CFU Call Forwarding Unconditional SS-CLIP Calling Line Identification Presentation SS-CLIR Calling/Connected Line Identification Restriction SS-COLP COnnected Line identification Presentation SS-CR Call Report SS-CRT Call ReTention SS-CW Call Waiting SS-DGNA Dynamic Group Number Assignment SS-DL Discreet Listening SS-HOLD Call HOLD SS-IC Include Call SS-LE Late Entry SS-LSC List Search Call SS-PC Priority Call SS-PPC Pre-emptive Priority Call SS-SNA Short Number Addressing SS-TPI Talking Party Identification 4 Supplementary Service Pre-emptive Priority Call (SS-PPC) stage 1 specification 4.1 Description 4.1.1 General description 4.1.1.1 Resource pre-emption SS-PPC call enables the users to have resources allocated, even if this means that other calls with lower priority are disconnected. SS-PPC normally means one of the highest Access Priority Levels (APL) at uplink access and one of the highest Priority Levels (PL) across SwMIs. Normally the calling user defines the pre-emptive priority level for the call, but SwMI may modify that value or allocate that value. The reasons for modification or allocation are outside the scope of the present document. If the required resources are unavailable (i.e. occupied by other users) for the SS-PPC call SwMI should release resou
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