Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 11: Supplementary services stage 2; Sub-part 16: Pre-emptive Priority Call (PPC)

The present document defines the stage 2 specifications of the Supplementary Service Pre-emptive Priority Call (SS-PPC) for the TErrestrial Trunked Radio (TETRA). SS-PPC enables a user to have preferential access to the network resources in a TETRA system in times of congestion including pre-emption of calls. SS-PPC is applicable for pre-emptive priorities including the emergency priority. SS-PPC includes the capability to pre-empt resources needed for higher priority calls and the capability to pre-empt users from ongoing calls in order to move them to higher priority calls. SS-PPC specifies the definition, activation, deactivation and interrogation for the usage of pre-emptive call priorities in the TETRA system. The Switching and Management Infrastructure (SwMI) applies the SS-PPC priorities when it allocates the resources for calls. The SS-PPC operations are defined for the SwMI and for the Mobile Station (MS). SS-PPC is defined to subscribers of one TETRA system, but the subscribers may be located in several TETRA systems and the information flows may be delivered over the Inter-System Interface (ISI). SS-PPC also is invoked for calls within one TETRA system or for calls that extend over ISI to several TETRA systems.
Man-Machine Interface (MMI) and charging principles are outside the scope of the present document. Stage 2 describes the functional capabilities of the Supplementary Service introduced in stage 1 description. Stage 2 identifies the functional capabilities for the management and operation of the service in the SwMI and in the MS. Stage 2 describes also the information flows exchanged between these entities and the flows sent over the ISI. NOTE: The stage 2 description is followed by the stage 3 description, which specifies the encoding rules for the information flows and process behaviour for the different entities in the SwMI and in the MS.

Prizemni snopovni radio (TETRA) – Govor in podatki (V+D) – 11. del: Dopolnilne storitve stopnje 2 – 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

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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) – 11. del: Dopolnilne storitve stopnje 2 – 16. poddel: Prednostni klic s predpravico (PPC)Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 11: Supplementary services stage 2; 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 300 392-11-16 Version 1.2.1SIST EN 300 392-11-16 V1.2.1:2006en01-april-2006SIST EN 300 392-11-16 V1.2.1:2006SLOVENSKI

STANDARD
SIST EN 300 392-11-16 V1.2.1:2006

ETSI EN 300 392-11-16 V1.2.1 (2004-09)European Standard (Telecommunications series) Terrestrial Trunked Radio (TETRA);Voice plus Data (V+D);Part 11: Supplementary services stage 2;Sub-part 16: Pre-emptive Priority Call (PPC)

SIST EN 300 392-11-16 V1.2.1:2006
ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 2

Reference REN/TETRA-03124 Keywords data, radio, speech, stage 2, supplementary service, TETRA, V+D 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 300 392-11-16 V1.2.1:2006

ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 3

Contents Intellectual Property Rights................................................................................................................................5 Foreword.............................................................................................................................................................5 1 Scope........................................................................................................................................................7 2 References................................................................................................................................................7 3 Definitions and abbreviations...................................................................................................................8 3.1 Definitions..........................................................................................................................................................8 3.2 Abbreviations.....................................................................................................................................................8 4 Functional model......................................................................................................................................8 4.1 Functional model description.............................................................................................................................8 4.2 Description of functional entities.....................................................................................................................10 4.2.1 User A's FE, FE1........................................................................................................................................10 4.2.2 SS-PPC FE in the individual or group home SwMI, FE21.........................................................................10 4.2.3 SS-PPC FE in the controlling SwMI, FE21................................................................................................11 4.2.4 SS-PPC FE in called user visited SwMI or participating SwMI, FE25......................................................11 4.2.5 Authorized user's FE, FE3..........................................................................................................................12 4.2.6 User B's (called party) FE, FE5..................................................................................................................12 4.2.7 User C's (pre-empted party) FE, FE8..........................................................................................................13 4.2.8 User D's (remaining party) FE, FE9...........................................................................................................13 4.3 Relationship of functional model to basic call functional model.....................................................................13 5 Information flows...................................................................................................................................14 5.1 Definition of information flows........................................................................................................................14 5.1.1 Definition....................................................................................................................................................15 5.1.1.1 DEFINE................................................................................................................................................15 5.1.1.2 DEFINE-ACK.......................................................................................................................................15 5.1.1.3 ASSIGN................................................................................................................................................16 5.1.1.4 ASSIGN-ACK......................................................................................................................................16 5.1.2 Activation/deactivation...............................................................................................................................16 5.1.2.1 ACTIVATE...........................................................................................................................................17 5.1.2.2 ACTIVATE-ACK.................................................................................................................................17 5.1.2.3 DEACTIVATE.....................................................................................................................................17 5.1.2.4 DEACTIVATE-ACK............................................................................................................................17 5.1.3 Interrogation...............................................................................................................................................18 5.1.3.1 INTERROGATE...................................................................................................................................18 5.1.3.2 INTERROGATE-ACK.........................................................................................................................18 5.1.4 Operation and invocation............................................................................................................................19 5.1.4.1 Pre-emption...........................................................................................................................................19 5.1.4.1.1 General on pre-emption...................................................................................................................19 5.2.4.1.2 Resource pre-emption......................................................................................................................19 5.2.4.1.3 Called User pre-emption..................................................................................................................19 5.1.4.1.3.1 General on called user pre-emption...........................................................................................19 5.1.4.1.3.2 Individual SS-PPC call..............................................................................................................20 5.1.4.1.3.3 Group SS-PPC call.....................................................................................................................20 5.1.4.2 Exceptional situations...........................................................................................................................21 5.1.4.3 PRIORITY1..........................................................................................................................................21 5.1.4.4 PRIORITY2..........................................................................................................................................21 5.1.4.5 IMPENDING-PRE-EMPTION.............................................................................................................21 5.1.4.6 PRE-EMPTION....................................................................................................................................21 5.1.4.7 USER-PRE-EMPTED...........................................................................................................................22 5.1.5 Information flows between different TETRA systems...............................................................................22 5.2 Relationship of SS-PPC information flows to other information flows...........................................................22 5.3 Service primitives.............................................................................................................................................22 5.4 Information flow sequences.............................................................................................................................23 5.4.1 Definition....................................................................................................................................................24 SIST EN 300 392-11-16 V1.2.1:2006

ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 4

5.4.1.1 Definition of SS-PPC when definition is sent to user A........................................................................24 5.4.1.2 Definition when authorized user is in visited system............................................................................24 5.4.1.3 Definition when user A is in visited system..........................................................................................25 5.4.2 Interrogation...............................................................................................................................................26 5.4.3 Activation...................................................................................................................................................26 5.4.4 Deactivation................................................................................................................................................26 5.4.5 FE actions...................................................................................................................................................27 5.4.5.1 FE actions of FE1..................................................................................................................................27 5.4.5.2 FE actions of FE21................................................................................................................................27 5.4.5.3 FE actions of FE3..................................................................................................................................27 5.4.5.4 FE actions of FE25................................................................................................................................27 5.4.6 Operation of SS-PPC with pre-emption due to lack of resources...............................................................28 5.4.6.1 Operation of SS-PPC for individual call with resource pre-emption....................................................28 5.4.6.2 Operation of SS-PPC for a group call with resource pre-emption........................................................28 5.4.6.3 Operation of SS-PPC with resource pre-emption of participants in a group call..................................30 5.4.7 Operation of SS-PPC with a called party that is pre-empted from an ongoing call....................................30 5.4.7.1 SS-PPC call is an individual call...........................................................................................................30 5.4.7.2 SS-PPC call is a group call....................................................................................................................31 5.4.8 Operation for SS-PPC call initiated over ISI..............................................................................................31 5.4.9 FE actions...................................................................................................................................................31 5.4.9.1 FE actions of FE1..................................................................................................................................31 5.4.9.2 FE actions of FE21................................................................................................................................32 5.4.9.3 FE actions of FE25................................................................................................................................32 5.4.9.4 FE actions of FE5..................................................................................................................................32 5.4.9.5 FE actions of FE8..................................................................................................................................32 6 Allocation of FEs to physical equipment...............................................................................................32 7 Interworking considerations...................................................................................................................33 Annex A (informative): Change requests.............................................................................................34 History..............................................................................................................................................................35

SIST EN 300 392-11-16 V1.2.1:2006
ETSI ETSI EN 300 392-11-16 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 11, 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"; EN 300 392-11: "Supplementary services stage 2"; Sub-part 1: "Call Identification (CI)"; Sub-part 2: "Call Report (CR)"; 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 (SNA)"; Sub-part 8: "Area Selection (AS)"; Sub-part 9: "Access Priority (AP)"; 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 (CCBS)"; SIST EN 300 392-11-16 V1.2.1:2006

ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 6

Sub-part 14: "Late Entry (LE)"; 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 (CCNR)"; Sub-part 24: "Call Retention (CRT)"; 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 300 392-11-16 V1.2.1:2006
ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 7

1 Scope The present document defines the stage 2 specifications of the Supplementary Service Pre-emptive Priority Call (SS-PPC) for the TErrestrial Trunked Radio (TETRA). SS-PPC enables a user to have preferential access to the network resources in a TETRA system in times of congestion including pre-emption of calls. SS-PPC is applicable for pre-emptive priorities including the emergency priority. SS-PPC includes the capability to pre-empt resources needed for higher priority calls and the capability to pre-empt users from ongoing calls in order to move them to higher priority calls. SS-PPC specifies the definition, activation, deactivation and interrogation for the usage of pre-emptive call priorities in the TETRA system. The Switching and Management Infrastructure (SwMI) applies the SS-PPC priorities when it allocates the resources for calls. The SS-PPC operations are defined for the SwMI and for the Mobile Station (MS). SS-PPC is defined to subscribers of one TETRA system, but the subscribers may be located in several TETRA systems and the information flows may be delivered over the Inter-System Interface (ISI). SS-PPC also is invoked for calls within one TETRA system or for calls that extend over ISI to several TETRA systems. Man-Machine Interface (MMI) and charging principles are outside the scope of the present document. Stage 2 describes the functional capabilities of the Supplementary Service introduced in stage 1 description. Stage 2 identifies the functional capabilities for the management and operation of the service in the SwMI and in the MS. Stage 2 describes also the information flows exchanged between these entities and the flows sent over the ISI.

NOTE: The stage 2 description is followed by the stage 3 description, which specifies the encoding rules for the information flows and process behaviour for the different entities in the SwMI and in the MS. 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] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air Interface (AI)". [2] ETSI EN 300 392-10-16: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 10: Supplementary services stage 1; Sub-part 16: Pre-emptive Priority Call (PC)". [3] ETSI EN 300 392-12-16: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 12: Supplementary services stage 3; Sub-part 16: Pre-emptive Priority Call (PPC)". [4] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 9: General requirements for supplementary services". [5] ETSI EN 300 392-3-3: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 3: Additional Network Feature Group Call (ANF-ISIGC)". SIST EN 300 392-11-16 V1.2.1:2006

ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 8

3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: authorized user: user who is authorized to define, activate, deactivate and interrogate the SS-PPC emergency priority: highest pre-emptive priority pre-emption: exclusion of one or more parties from an ongoing service due to a SS-PPC operation for another service NOTE: The pre-emption is carried out due to the lack of resources or due to the need to join a called party to a higher priority pre-emptive call. The users may be warned of the impending pre-emption or indicated, if any party is pre-empted from the ongoing call. user A: calling party, the party that invokes or generates invocation of SS-PPC user B: called party in a call in which SS-PPC is operated NOTE: The called user may be pre-empted user from another call. user C: pre-empted user, a user that is involved in a call, which is pre-empted due to lack of resources for a SS-PPC NOTE: There may be one, two or more pre-empted users in a pre-empted call. user D: remaining user or users in a call from which a user or users have been pre-emptied 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: CC Call Control functional entity CCA Call Control functional entity Agent CRV Call Retention Value CMCE Circuit Mode Control Entity FE Functional Entity ISI Inter-System Interface LS Line connected Station MMI Man-Machine Interface MS Mobile Station PDU Protocol Data Unit SS-PPC Supplementary Service Pre-emptive Priority Call SwMI Switching and Management Infrastructure 4 Functional model 4.1 Functional model description The functional model describes the functional characteristics of the Functional Entities (FEs) involved in the management and operation of SS-PPC. The functional model shall comprise the following FEs: FE1 user A's (calling party's) FE; FE21 SS-PPC FE in home SwMI or controlling SwMI; SIST EN 300 392-11-16 V1.2.1:2006

ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 9

NOTE 1: During definition, activation, deactivation and interrogation request, FE21 may either be user A's home SwMI or a group home SwMI. During invocation and operation, FE21 will be the controlling SwMI of the pre-emptive priority call that has been initiated. FE3 authorized user's FE; FE5 user B's (called party's) FE; NOTE 2: Called party in a call in which SS-PPC is operated. The called user may be pre-empted party FE8 of another call either due to lack of resources or the user is pre-empted to be joined to the pre-emptive priority call. FE25 SS-PPC FE in user B's SwMI; FE8 user C's (pre-empted party's) FE; NOTE 3: Pre-empted user, a user that is involved in a call which is pre-empted due to lack of resources. FE9 user D's (remaining party's) FE; NOTE 4: Remaining user or users in a call from which a user or users have been pre-emptied. CC Call Control FE in SwMI. CCA Call Control Agent FE in MS/LS. NOTE 5: The above FEs has been numbered in accordance with EN 300 392-9 [4]. The following relationships shall exist between these FEs: ra between FE1 and FE21/FE25; rb between FE21 and FE25; rc between FE21 and FE3; rd between FE21/FE25 and FE5; re between FE21/FE25 and FE8; rf between FE21/FE25 andFE9. Figure 1 shows these FEs and the possible relationships for the management part and figure 2 for the operational part. homevisitedsystemsystemrcrbrcFE3FE21FE25FE3authorizedSS-PPC FESS-PPC FEauthorizeduserin system 1in system 2userraraFE1FE1user Auser A Figure 1: The relations and the FEs of the management part of SS-PPC SIST EN 300 392-11-16 V1.2.1:2006

ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 10 homevisitedsystemsystemrarbraFE1FE21FE25FE1rdrduser Auser ASS-PPC FEin system 1SS-PPC FEin system 2FE5FE5user Brereuser BFE8FE8user Cuser CFE9user DFE9user Drfrf Figure 2: The relations and FEs of the operational part of SS-PPC 4.2 Description of functional entities 4.2.1 User A's FE, FE1 The functional tasks of FE1 for definition and interrogation shall be the following: - as an option, the MS/LS may support reception of SS-PPC definition from FE21. Upon acceptance, FE1 shall pass the SS-PPC definition request, to the user application and acknowledge the SS-PPC definition, if FE21 has requested this; - as an option, the MS/LS supports SS-PPC interrogation, FE1 shall pass the SS-PPC interrogation request to FE21, when the user application issues it. The functional tasks for operation of FE1 for pre-emptive priority individual and group call request shall be as follows: - upon reception of the SS-PPC invocation from the user application within a call set-up, FE1 shall send the SS-PPC invocation to the SwMI (FE21) with the call set-up; - upon reception of a SS-PPC confirmation from FE21, FE1 shall pass the SS-PPC confirmation to the user application. 4.2.2 SS-PPC FE in the individual or group home SwMI, FE21 The functional tasks of FE21 for definition, activation, deactivation and interrogation shall be the following: - as an option, FE21 supports SS-PPC definition, FE21 shall verify these request when received from FE3 and if found valid, save this information and acknowledge it to FE3; - as an option, FE21 supports SS-PPC activation or deactivation, FE21 shall verify these request when received from FE3 and if found valid, save this information and acknowledge it to FE3; SIST EN 300 392-11-16 V1.2.1:2006

ETSI ETSI EN 300 392-11-16 V1.2.1 (2004-09) 11 - as an option, if FE3 requested downloading of SS-PPC definition to FE1(s), FE21 shall then send the corresponding requests to the concerned FE1s and may receive their acknowledgements; - at the reception of an SS-PPC interrogation request from either FE3 or FE1, FE21 should verify the request and send the response to FE3 or FE1. 4.2.3 SS-PPC FE in the controlling SwMI, FE21 The functional tasks for operation of FE21 for pre-emptive priority individual and group calls shall be as follows: - when FE21 receives a call set-up request with the SS-PPC invocation, FE21 shall verify the received priority and change it, if needed. However FE21 should not change it when it corresponds to the highest SS-PPC priority value, i.e. emergency; - FE21 shall determine if pre-emption is needed to gain resources to the invoked SS-PPC call. If yes, FE21 may first send an impending pre-emption indication to FE8(s) and shall then send a pre-emption indication; - FE21 shall send the SS-PPC call set-up, with its pre-emptive priority value to the called party/parties (FE5); - optionally, FE21 may send the impending pre-emption indication to: - the called party (FE5) of an individual SS-PPC call before or together with the SS-PPC call set-up; or NOTE 1: This only applies when the called party of the individual PPC call is registered in FE21. - the called parties (FE5s) of a group SS-PPC call before the SS-PPC call set-up, when the called party/parties (FE5) are active in another call. NOTE 2: Impending pre-emption indication sent together with a SS-PPC group call set-up is not applicable. The impending pre-emption indication shall be followed by a pre-emption indication when the impending pre-emption indication was sent together with the SS-PPC call set-up, otherwise the individual SS-PPC call set-up shall follow the impending pre-emption indication: - when pre-empting the called party from an individual call, FE21 shall ensure that the individual call is released; - if the pre-empted party/parties was/were engaged in a group call, FE21 may indicate to the remaining participants (FE9) in this group call that this/these pre-empted party/parties (FE5) is/are disconnect

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