Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 16: Pre-emptive Priority Call (PPC)

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.

Prizemni snopovni radio (TETRA) – Govor in podatki (V+D) – 10. del: Dopolnilne storitve stopnje 1 – 16. poddel: Prednostni klic s predpravico (PPC)

General Information

Status
Published
Publication Date
31-Mar-2006
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Apr-2006
Due Date
01-Apr-2006
Completion Date
01-Apr-2006
Mandate

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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 1.2.1SIST EN 300 392-10-16 V1.2.1:2006en01-april-2006SIST EN 300 392-10-16 V1.2.1:2006SLOVENSKI

STANDARD
SIST EN 300 392-10-16 V1.2.1:2006

ETSI EN 300 392-10-16 V1.2.1 (2004-09)European Standard (Telecommunications series) 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 V1.2.1:2006
ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 2

Reference REN/TETRA-03121 Keywords data, priority call, radio, speech, stage 1, TETRA, supplementary service ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88

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 2004. 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 V1.2.1:2006

ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 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..........................................................................................................................9 4.1.2 Qualifications on applicability to telecommunication services...................................................................10 4.2 Procedures........................................................................................................................................................10 4.2.1 Provision and withdrawal...........................................................................................................................10 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.......................................................................................................................11 4.2.2.2.1 General on invocation and operation...............................................................................................11 4.2.2.2.2 Pre-empting individual call set-up...................................................................................................12 4.2.2.2.3 Pre-empting group call set-up..........................................................................................................12 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....................................................................................................................................13 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)...................................................................14 4.3.4 Call Report (SS-CR)...................................................................................................................................14 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)..............................................................................................................................15 4.3.14 Access Priority (SS-AP).............................................................................................................................15 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 V1.2.1:2006

ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 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).........................................................................................................16 4.3.23 Barring of Incoming Calls (SS-BIC)..........................................................................................................16 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

SIST EN 300 392-10-16 V1.2.1:2006
ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 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 Project Terrestrial Trunked Radio (TETRA). The present document is part 10, sub-part 16 of a multi-part deliverable covering 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"; Sub-part 1: "Call Identification (CI)"; Sub-part 2: "Call report"; Sub-part 3: "Talking Party Identification (TPI)"; Sub-part 4: "Call Forwarding (CF)"; Sub-part 5: "List Search Call (LSC)"; Sub-part 6: "Call Authorized by Dispatcher (CAD)"; Sub-part 7: "Short number addressing"; Sub-part 8: "Area Selection (AS)"; Sub-part 9: "Access priority"; Sub-part 10: "Priority Call (PC)"; Sub-part 11: "Call Waiting (CW)"; Sub-part 12: "Call Hold (HOLD)"; Sub-part 13: "Call completion to busy subscriber"; Sub-part 14: "Late Entry (LE)"; SIST EN 300 392-10-16 V1.2.1:2006

ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 6

Sub-part 15: "Transfer of control"; Sub-part 16: "Pre-emptive Priority Call (PPC)"; Sub-part 17: "Include Call (IC)"; Sub-part 18: "Barring of Outgoing Calls (BOC)"; Sub-part 19:

"Barring of Incoming Calls (BIC)"; Sub-part 20: "Discreet Listening (DL)"; Sub-part 21: "Ambience Listening (AL)"; Sub-part 22: "Dynamic Group Number Assignment (DGNA)"; Sub-part 23: "Call completion on no reply"; Sub-part 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"; TS 100 392-17: "TETRA V+D and DMO Release 1.1 specifications". NOTE: Part 13 (SDL) and part 14 (PICS) of this multi-part are of status "historical" and will not be updated according to this version of the standard.

National transposition dates Date of adoption of this EN: 17 September 2004 Date of latest announcement of this EN (doa): 31 December 2004 Date of latest publication of new National Standard or endorsement of this EN (dop/e):

30 June 2005 Date of withdrawal of any conflicting National Standard (dow): 30 June 2005

SIST EN 300 392-10-16 V1.2.1:2006
ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 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)". 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 impending pre-emption warning indication: warning provided before a pre-emption of the call is established SIST EN 300 392-10-16 V1.2.1:2006

ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 8

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 CSA Called Subscriber Answer CRV Call Retention Value GTSI Group TETRA Subscriber Identity I/F Interface ITSI Individual TETRA Subscriber Identity MS Mobile Station PPL Pre-emptive Priority Level PL 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 SS-CFU Call Forwarding Unconditional SS-CLIP Calling Line Identification Presentation SIST EN 300 392-10-16 V1.2.1:2006

ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 9

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 resources of the oldest calls with the lowest SwMI Call Retention Value (CRV) and give the released resources to the SS-PPC call. The Call ReTention Supplementary Service (SS-CRT), ETS 300 392-10-24 [3], may also be used to determine which sources to release. NOTE 1: It is possible that some networks may prefer a different process for determining resource priority. NOTE 2: The network operator may have to provide a correspondence between priority values and CRVs. This correspondence and the means to establish it are outside the scope of the present document.

In the case where there is no congestion across the air interface or the network resources and the called user is not engaged, the call shall be set up in the normal manner, but the call shall keep the call retention value of the pre-emptive priority call. 4.1.1.2 Called user pre-emption In the event where the destination TETRA address is already engaged on an established call the pre-emptive priority call shall have the ability to interrupt and pre-empt the call at the destination address, unless the established call has a sufficiently high priority that the incoming pre-emptive priority call cannot pre-empt. The user pre-emption has two steps: - SwMI decision whether the call where the called user is engaged is terminated; and

- in the case SwMI does not terminate the existing call the called user application decides whether to accept the incoming call or continue with the existing call. SIST EN 300 392-10-16 V1.2.1:2006

ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 10 The SwMI decision whether the existing call to the called user is disconnected is the same as in clause 4.1.1.1.

Table 1 indicates which priorities of the incoming PPC call should cause the active call to be pre-empted without user application decision, depending on whether option 1 or 2 is chosen, at the destination assuming the SS-PPC call is of a higher priority than the active call. Table 1: Priorities that cause user pre-emption from a lower priority call without user application decision Active call

Group Individual Group Option 1: 3 and 4 Option 2: none 3 and 4 SS-PPC call Individual 3 and 4 3 and 4

Table 2 indicates which priorities of the incoming PPC call should cause the "user application" to decide if the active call is to be pre-empted or not, depending on whether option 1 or 2 is chosen, at the destination assuming the SS-PPC call is of a higher priority than the active call. Table 2: Priorities on which user application decides pre-emption Active call

Group Individual Group Option 1: 1 and 2 Option 2: 1, 2, 3 and 4 1 and 2 SS-PPC call Individual 1 and 2 1 and 2

Algorithms how user application decides user pre-emption for the cases identified in table 2 may depend on the terminal personalization. The terminal personalization is outside the scope of the present document and MS may support option 1 or option 2 or both options defined in tables 1 and 2. NOTE: Terminal personalization may define whether option 1 or 2 is applied. If the Pre-emptive Priority Level (PPL) is the same or less than the priority of the established call, then pre-emption shall not take place. Retrieving the called user from an individual call shall automatically force release of the established call. Retrieving the called user from a group call shall depend upon whether the called user is the call owner of the group call. If the called user is the group call owner then the group call shall be force released upon pre-emption. If the called user is solely a participating member of the group then the group call shall not be force released, and only the called user is removed from the ongoing group call. 4.1.2 Qualifications on applicability to telecommunication services This supplementary service shall be applicable to all individual and group TETRA teleservices and bearer services. It shall not be applicable to TETRA packet data services nor to the Short Data Service (SDS). 4.2 Procedures 4.2.1 Provision and withdrawal Provision and withdrawal of SS-PPC shall be by pre-arrangement with the service provider. SS-PPC shall be on a per TETRA number (ITSI/GTSI) basis. For each ITSI/GTSI, the supplementary service may be subscribed to for every basic service subscribed to at that ITSI/GTSI, or for only some of the basic services subscribed to at that ITSI/GTSI. The subscription parameters and values offered by a Switching and Management Infrastructure (SwMI) shall be an implementation matter. A SwMI may offer more or less parameters and values than those specified in table 3. SIST EN 300 392-10-16 V1.2.1:2006

ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 11 Table 3: Subscription options Subscription parameter Value Immediate pre-emption required Yes/No Time to pre-emption (only required if answer to above is "No")

Seconds

4.2.2 Normal procedures 4.2.2.1 Activation, deactivation, definition, registration, interrogation and cancellation 4.2.2.1.1 Activation and deactivation SS-PPC is activated by the service provider upon provision and deactivated upon withdrawal. Optionally SwMI may support activation and deactivation as a part of definition. 4.2.2.1.2 Definition Definition of SS-PPC values for individual and group users may be optionally supported. 4.2.2.1.3 Registration Registration shall not be applicable to a SS-PPC. 4.2.2.1.4 Interrogation The infrastructure may optionally provide interrogation, which can be local, remote or both. If local interrogation is provided, a SwMI shall support interrogation on a per number basis. The infrastructure response to an interrogation request shall provide the following information to the user: - activation state; and - priority value. In remote interrogation in addition the response shall contain: - delivery state to the served user; and - whether acknowledgement is requested from the served user. 4.2.2.1.5 Cancellation Optionally infrastructure may support removal of SS-PPC feature on request by authorized user.

4.2.2.2 Invocation and operation 4.2.2.2.1 General on invocation and operation The served user shall be able to invoke SS-PPC as part of the initial call set up. The served user should be assigned a traffic channel and network resources, regardless of the operating state of the SwMI. Should no traffic channels be available at the call request, the oldest call with the lowest call retention value should be released, if there are any lower priority calls, refer to clause 4.1.1.1.

SIST EN 300 392-10-16 V1.2.1:2006
ETSI ETSI EN 300 392-10-16 V1.2.1 (2004-09) 12
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