ETSI EN 300 392-12-14 V1.2.1 (2012-03)

European Standard
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 12: Supplementary services stage 3;
Sub-part 14: Late Entry (LE)
2 ETSI EN 300 392-12-14 V1.2.1 (2012-03)

Reference
REN/TETRA-03214
Keywords
late entry, supplementary service, TETRA
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ETSI
3 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 8
4 SS-LE service description . 9
4.1 General . 9
4.2 SS-LE services offered over the TNSS-SAP and TNCC-SAP . 10
4.3 SS-LE service primitives . 10
4.3.1 List of SS-LE service primitives . 10
4.3.2 ACKNOWLEDGE LE indication . 11
4.3.3 ACKNOWLEDGE LE response . 11
4.3.4 BROADCAST LE indication . 11
4.3.5 DEFINE request . 12
4.3.6 DEFINE indication . 12
4.3.7 INTERROGATE request . 12
4.3.8 INTERROGATE indication. 13
4.3.9 PAGING LE indication . 13
4.3.10 PAGING LE response . 13
4.4 Parameter descriptions . 13
5 Signalling protocol for the support of SS-LE . 15
5.1 General . 15
5.2 SS-LE operational requirements . 15
5.2.1 Served user MS/LS . 15
5.2.2 Served user SwMI . 15
5.2.3 Group controlling SwMI . 15
5.2.4 Served user home SwMI . 16
5.2.5 Authorized user MS/LS . 16
5.2.6 Authorized user SwMI . 16
5.2.7 Calling user MS/LS . 16
5.3 SS-LE Coding requirements . 16
5.3.1 SS-LE PDUs . 16
5.3.1.1 General on SS_LE PDUs . 16
5.3.1.2 DEFINE PDU . 16
5.3.1.3 DEFINE ACK PDU . 17
5.3.1.4 INFORM1 PDU . 17
5.3.1.5 INFORM2 PDU . 18
5.3.1.6 INFORM2 ACK PDU . 18
5.3.1.7 INFORM3 PDU . 18
5.3.1.8 INFORM3 ACK PDU . 18
5.3.1.9 INFORM4 PDU . 18
5.3.1.10 INTERROGATE PDU . 19
5.3.1.11 INTERROGATE ACK PDU . 19
5.3.2 Information element coding . 20
5.3.2.1 Basic service type . 20
5.3.2.2 Call behaviour . 20
5.3.2.3 Defined group extension . 20
5.3.2.4 Defined group SNA. 20
5.3.2.5 Defined group SSI . 21
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4 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
5.3.2.6 Defined group type identifier . 21
5.3.2.7 Interrogated group extension . 21
5.3.2.8 Interrogated group SNA . 21
5.3.2.9 Interrogated group SSI . 21
5.3.2.10 Interrogated group type identifier . 21
5.3.2.11 LE definition . 21
5.3.2.12 LE used over ISI . 22
5.3.2.13 Notification indicator . 22
5.3.2.14 Range type for defined groups . 22
5.3.2.15 Range type for interrogated groups . 22
5.3.2.16 Repetition rate . 22
5.3.2.17 Result of definition . 22
5.3.2.18 Result of interrogation. 23
5.3.2.19 SS-LE PDU type . 23
5.4 SS-LE protocol states . 24
5.4.1 Protocol states of the served user MS/LS . 24
5.4.2 Protocol states of the home SwMI . 24
5.4.2.1 State IDLE. 24
5.4.2.2 State SS-LE ACTIVE . 24
5.4.3 Protocol states of the authorized user MS/LS . 24
5.4.4 Protocol states of the visited SwMI . 24
5.4.4.1 State IDLE. 24
5.4.4.2 State SS-LE ACTIVE . 24
5.5 SS-LE signalling procedures . 24
5.5.1 Address usage . 24
5.5.2 Procedures for served user MS/LS . 24
5.5.3 Procedures for home SwMI . 25
5.5.3.1 Definition in the home SwMI. 25
5.5.3.2 Interrogation in the home SwMI . 25
5.5.3.3 Invocation and operation in group home SwMI . 26
5.5.4 Procedures for FE3 . 26
5.5.5 Procedures for FE2 in visited SwMI . 27
5.5.5.1 Support of SS-LE definition and interrogation in FE2 in visited SwMI . 27
5.5.5.2 Support of SS-LE operation in FE2 in visited SwMI . 27
5.5.6 Generic SS procedures in the visited SwMI . 27
5.6 Protocol timers . 27
6 SS-LE FE behaviour . . 28
6.1 General . 28
6.2 Behaviour of FE1 . 28
6.3 Behaviour of FE2 in home SwMI . 28
6.4 Behaviour of FE3 . 31
6.5 Behaviour of FE2 in visited SwMI . 32
7 Interworking considerations . 33
Annex A (informative): Change Requests . . 34
History . 35

ETSI
5 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
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://ipr.etsi.org).
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 (EN) has been produced by ETSI Technical Committee Terrestrial Trunked Radio (TETRA).
The present document is part 12, sub-part 14 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";
EN 300 392-12: "Supplementary services stage 3";
EN 300 392-12-1: "Call Identification (CI)";
ETS 300 392-12-2: "Call Report (CR)";
EN 300 392-12-3: "Talking Party Identification (TPI)";
EN 300 392-12-4: "Call Forwarding (CF)";
ETS 300 392-12-5: "List Search Call (LSC)";
EN 300 392-12-6: "Call Authorized by Dispatcher (CAD)";
ETS 300 392-12-7: "Short Number Addressing (SNA)";
EN 300 392-12-8: "Area Selection (AS)";
ETS 300 392-12-9: "Access Priority (AP)";
EN 300 392-12-10: "Priority Call (PC)";
ETS 300 392-12-11: "Call Waiting (CW)";
EN 300 392-12-12: "Call Hold (HOLD)";
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6 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
EN 300 392-12-13: "Call Completion to Busy Subscriber (CCBS)";
EN 300 392-12-14: "Late Entry (LE)";
EN 300 392-12-16: "Pre-emptive Priority Call (PPC)";
EN 300 392-12-17: "Include Call (IC)";
EN 300 392-12-18: "Barring of Outgoing Calls (BOC)";
EN 300 392-12-19: "Barring of Incoming Calls (BIC)";
EN 300 392-12-20: "Discreet Listening (DL)";
EN 300 392-12-21: "Ambience Listening (AL)";
EN 300 392-12-22: "Dynamic Group Number Assignment (DGNA)";
EN 300 392-12-23: "Call Completion on No Reply (CCNR)";
ETS 300 392-12-24: "Call Retention (CRT)";
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 3, sub-parts 6 and 7 (Speech format implementation), part 4, sub-part 3 (Data networks gateway),
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: 13 March 2012
Date of latest announcement of this EN (doa): 30 June 2012
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 December 2012
Date of withdrawal of any conflicting National Standard (dow): 31 December 2012

ETSI
7 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
1 Scope
The present document defines the stage 3 specifications of the Supplementary Service Late Entry (SS-LE) for the
Terrestrial Trunked Radio (TETRA).
SS-LE allows radio users to be informed of and, if they are concerned, to join an already existing point-to-multipoint
speech or data call.
Man-Machine Interface (MMI) and charging principles are outside the scope of the present document.
Supplementary Service stage 3 specification is preceded by the stage 1 and the stage 2 specifications of the service.
Stage 1 describes the functional capabilities from the user's point of view. Stage 2 defines the functional behaviour in
terms of functional entities and information flows. Stage 3 gives a precise description of the Supplementary Service
from the implementation point of view. It defines the protocols for the service and the encoding rules for the
information flows. It defines the processes for the functional entities and their behaviour. The described protocols and
behaviour apply for the Switching and Management Infrastructure (SwMI) and for the Mobile Station (MS) and can be
applied over the Inter-System Interface (ISI) between TETRA systems.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ETSI EN 300 392-10-14: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 10: Supplementary services stage 1; Sub-part 14: Late Entry (LE)".
[2] ETSI EN 300 392-11-14: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 11: Supplementary services stage 2; Sub-part 14: Late Entry (LE)".
[3] ETSI EN 300 392-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 1: General network design".
[4] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 9: General requirements for supplementary services".
[5] ETSI ETS 300 392-12-7: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 12: Supplementary services stage 3; Sub-part 7: Short Number Addressing (SNA)".
[6] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air
Interface (AI)".
[7] 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)".
[8] ETSI EN 300 392-3-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 1: General design".
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8 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
[9] ETSI EN 300 392-3-5: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 5: Additional Network Feature
for Mobility Management (ANF-ISIMM)".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ITU-T Recommendation Z.100 (1993): "Specification and description language (SDL)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
acknowledge LE: indication sent in LE messages by a SwMI to inform a member who would like to join the call that
he has to inform the SwMI of his entering the call
authorized user: identified user who is able to define and interrogate the SS-LE parameters
broadcast LE: indication sent by a SwMI to inform members of a multipoint call which are currently not already
involved in this call that they can join directly an existing communication (a channel is already allocated in this cell)
home SwMI: TETRA system in which SS-LE can be defined and invoked
NOTE: Home SwMI is the TETRA system which has same Mobile Network Identity (MNI) as the TETRA group
identity to which SS-LE is defined.
paging LE: indication sent by a SwMI to inform members of a multipoint call which are currently not already involved
in this call that they need to ask for a communication channel for that call if they wish to participate the call (a channel
is not yet allocated in this cell)
server user: party that receives the SS-LE indications about an ongoing call and joins the call
NOTE: Also known as user B.
user B: in a group call a party that receives the SS-LE indications about an ongoing call
visited SwMI: TETRA system to which SS-LE can be extended and invoked
NOTE: Visited SwMI is a TETRA system which has a different MNI as the TETRA group identity to which
SS-LE is defined.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACK Acknowledgement
CC Call Control
CMCE Circuit Mode Control Entity
FE Functional Entity
GTSI Group TETRA Subscriber Identity
ISI Inter-System Interface
LE Late Entry
LS Line Station
MS Mobile Station
PDU Protocol Data Unit
SAP Service Access Point
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9 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
SS Supplementary Service
NOTE 1: The abbreviation SS is only used when referring to a specific supplementary service.
SSI Short Subscriber Identity
SwMI Switching and Management Infrastructure
TNCC TETRA Network layer Call Control
TNSS TETRA Network layer Supplementary Service
Supplementary service abbreviations
For the purposes of the present document, the following abbreviations also 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-CF Call Forwarding
SS-CFB Call Forwarding on Busy
SS-CFNR Call Forwarding on No Reply (generic for both CFNRy and CFNRc)
SS-CFNRc Call Forwarding on Mobile Subscriber Not Reachable
SS-CFNRy Call Forwarding on No Reply
SS-CFU Call Forwarding Unconditional
SS-CI Call Identification
SS-CLIP Calling Line Identification Presentation
SS-CLIR Calling Line Identification Restriction
SS-COLP COnnected Line identification Presentation
SS-COLR COnnected Line identification Restriction
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
NOTE 2: Supplementary service abbreviations are also used without "SS-" preamble e.g. "SS-AL" and "AL" are
used as appropriate.
NOTE 3: The supplementary services list contains also abbreviations that are not used in the present document.
4 SS-LE service description
4.1 General
SS-LE supplementary service enables users to join the group call after the original call setup. SS-LE specifies the
definition, interrogation and operation of the supplementary service. The Switching and Management Infrastructure
(SwMI) applies the SS-LE definitions when a call is active for the group. The SS-LE actions are defined for the SwMI
and for the Mobile Station (MS). The SS-LE information flows may be delivered over the Inter-System Interface (ISI).
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10 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
This supplementary service is applicable to circuit mode speech and data group call services defined in
EN 300 392-2 [6].
The Functional Entities used in the present document are defined in EN 300 392-11-14 [2].
4.2 SS-LE services offered over the TNSS-SAP and
TNCC-SAP
SS-LE is an optional supplementary service for TETRA voice plus data layer 3. If SS-LE is supported, this clause shall
specify the services and their availability.
The following SS-LE services shall be provided:
- late entry indications for a basic service (call control service).
The following SS-LE services may be provided:
- definition: a request to define SS-LE into the SwMI;
- definition information: the reception of SS-LE definition for information;
- interrogation: interrogation of SS-LE definition.
The SS-LE service access point may be used in conformance testing as a normative (but potentially not accessible)
boundary in MSs and LSs.
NOTE 1: As the present document only deals with the SS-LE all the service primitives have been shown without a
TNSS-LE-prefix e.g. the TNSS-LE DEFINE request is shorten into the DEFINE request.
NOTE 2: As man-machine interface and MS/LS applications are outside the scope of the present document service
primitives are used to define information exchange to and from the standardized part of the MS/LS. Those
primitives may be only indirectly accessible.
NOTE 3: The layer 3 services and service boundary for the SwMI are outside the scope of the present document.
The SS-LE services described in this clause shall complement the call control service specified in EN 300 392-2 [6],
clause 11.
4.3 SS-LE service primitives
4.3.1 List of SS-LE service primitives
The SS-LE services as defined in EN 300 392-10-14 [1] are accessed in the SS-LE protocol description via service
primitives. The SS-LE service primitives at the authorized user MS/LS (FE3) shall be:
- DEFINE request;
- DEFINE indication;
- INTERROGATE request; and
- INTERROGATE indication.
The SS-LE service primitives at the served user MS/LS (FE1) may be:
- BROADCAST LE indication;
- ACKNOWLEDGE LE indication;
- ACKNOWLEDGE LE response;
- PAGING LE indication; and
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11 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
- PAGING LE response.
Clauses 4.3.2 to 4.3.10 present the service primitive descriptions in alphabetic order.
4.3.2 ACKNOWLEDGE LE indication
The ACKNOWLEDGE LE indication primitive may be offered from FE1 to application over TNSS-SAP with the
corresponding basic call primitive TNCC-SETUP indication indicating an acknowledged group call. The
ACKNOWLEDGE LE indication primitive shall contain the SS-LE parameters listed in table 1. The
ACKNOWLEDGE indication implies, that application shall send an ACKNOWLEDGE LE response, if it wants to joint
in the call.
Table 1: ACKNOWLEDGE LE indication contents
Parameter C/O/M Remark
LE type M Acknowledge LE
4.3.3 ACKNOWLEDGE LE response
The ACKNOWLEDGE LE response primitive may be offered from application to FE1 over TNSS-SAP with the
corresponding basic call primitive TNCC-SETUP response. Application shall send the primitive if the subscriber joins
the call.
Application should discard any other ACKNOWLEDGE LE indications to the same call item:
- while it is making a response to the received ACKNOWLEDGE LE indication; and
- after sending an ACKNOWLEDGE LE response for the same call.
However, if the subscriber receives another ACKNOWLEDGE LE indication after leaving the call and if the user wants
to re-join in the group call, application shall send a new ACKNOWLEDGE LE response.
If the subscriber leaves the acknowledged call, e.g. due to another call, the application shall send a TNCC-RELEASE
request which invokes sending of a U-RELEASE PDU to SwMI to indicate that the user leaves the call.
If the paging LE is changed to acknowledge LE within a call and if the application has sent a PAGING LE response for
that call, the sent PAGING LE response shall be considered also as an ACKNOWLEDGE LE response.
In case of acknowledge LE, the response shall be sent in the allocated traffic channel, if any.
The ACKNOWLEDGE LE response primitive shall contain no SS-LE parameters.
4.3.4 BROADCAST LE indication
The BROADCAST LE indication primitive may be offered from FE1 to application over TNSS-SAP with the
corresponding basic call primitive TNCC-SETUP indication. The BROADCAST LE indication primitive shall contain
the SS-LE parameters listed in table 2.
Table 2: BROADCAST LE indication contents
Parameter C/O/M Remark
LE type O Broadcast LE
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12 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
4.3.5 DEFINE request
DEFINE request primitive may be offered from application to FE3 over TNSS-SAP. The primitive shall contain the
SS-LE parameters listed in table 3.
Defined group TETRA identity parameter is a repeatable parameter, which can define one group number, a list of
2 to 15 group numbers or a range of group numbers. Each defined group TETRA identity element shall comprise of any
of the following:
- address type identifier and Short Number Address (SNA);
- address type identifier and Short Subscriber Identity (SSI); or
- address type identifier and SSI and address extension (GTSI).
SNA, if used and supported, shall refer to the SS-SNA defined for sending authorized user. The SS-LE definition shall
be requested to all group numbers given as defined group TETRA identity according to the parameters listed after the
defined group TETRA identity.
Table 3: DEFINE request contents
Parameter C/O/M Remark
Defined group identity M Repeatable
LE definition M See note
LE used over ISI M See note
Basic service type M See note
Repetition rate M See note
NOTE: This parameter value is common to all defined group identities in
this service primitive.
4.3.6 DEFINE indication
DEFINE indication primitive may be offered from FE3 to application over TNSS-SAP. The primitive shall contain the
SS-LE parameters listed in table 4.
Defined group TETRA identity element is a repeatable parameter that shall define one group identity, a list of
2 to 15 group identities or a range of group identities. There shall be at least one defined group identity in a DEFINE
primitive.
It is required that result for definition apply for all group identities given as defined group identity. If the result for
definition parameter would be different, FE3 shall deliver separate DEFINE indication primitives to application.
Table 4: DEFINE indication contents
Parameter C/O/M Remark
Defined group identity M Repeatable
Result of definition M
4.3.7 INTERROGATE request
INTERROGATE request primitive may be offered from application to FE3 over TNSS-SAP. The primitive shall
contain the SS-LE parameters listed in table 5.
Interrogated group identity element is a repeatable parameter that shall define one group identity, a list of 2 to 14 group
identities or a range of group identities. There shall be at least one interrogated group identity in an INTERROGATE
primitive. SNA, if used, shall refer to the SNA defined for the sending authorized user.
Table 5: INTERROGATE request contents
Parameter C/O/M Remark
Interrogated group identity M Repeatable
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13 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
4.3.8 INTERROGATE indication
INTERROGATE indication primitive may be offered from FE3 to application over TNSS-SAP. The primitive shall
contain the SS-LE parameters listed in table 6.
Interrogated group TETRA identity element is a repeatable parameter that shall define one group number, a list of
2 to 14 group identities or a range of group identities. There shall be at least one interrogated group identity in
an INTERROGATE primitive.
The interrogation result and any following parameters in the primitive apply for all group numbers given as interrogated
group identity. If the parameters would be different, FE3 shall deliver separate INTERROGATE indication primitives
to application.
Table 6: INTERROGATE indication contents
Parameter C/O/M Remark
Interrogated group identity M Repeatable
Result of interrogation M See note 1
LE type C See note 2
LE used over ISI C See note 2
Basic service type C See note 2
Repetition rate C See note 2
NOTE 1: If the interrogation request failed, the reason is specified here.
NOTE 2: These parameters are present only when the interrogation is accepted.

4.3.9 PAGING LE indication
If the FE1 supports SS-LE paging function the PAGING LE indication primitive shall be offered from FE1 to
application over TNSS-SAP with the corresponding basic call primitive TNCC-SETUP indication. The primitive shall
contain the SS-LE parameters listed in table 7. The PAGING LE indication implies, that application shall send a
PAGING LE response, if the subscriber wishes to join in the call.
Table 7: PAGING LE indication contents
Parameter C/O/M Remark
LE type M LE Paging
4.3.10 PAGING LE response
The PAGING LE response primitive may be offered from application to FE1 over TNSS-SAP with the corresponding
basic call primitive TNCC-SETUP response. The application shall send the primitive only if the subscriber wishes to
join the call. The primitive shall contain no SS-LE parameters.
Application should discard any other PAGING LE indications to the same call while it is making the response to the
received PAGING LE indication or while it is waiting for a BROADCAST LE or ACKNOWLEDGE LE indication
after sending the LE PAGING response.
If the FE1 receives a BROADCAST LE indication after sending a PAGING LE response to the same call, it may try to
cancel the sending of the PAGING LE response and shall deliver the BROADCAST indication to the application.
The application shall not send any response to ACKNOWLEDGE LE indications, when it has sent an LE PAGING LE
response to the same call.
4.4 Parameter descriptions
Address extension =
- Mobile Network Identity comprising Mobile Country Code (MCC) and Mobile Network Code (MNC).
- See EN 300 392-1 [3], clause 7.
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14 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
Basic service type =
- multipoint circuit mode speech call; or
- multipoint circuit mode data call.
Defined group identity =
- Short Number Address (SNA);
- Short Subscriber Identity (SSI); or
- Short Subscriber Identity (SSI) + Address extension i.e. full GTSI.
- See EN 300 392-1 [3], clause 7.
NOTE: The SwMI may not support Short Number Address (SNA) nor mixing of Short Number Address (SNA)
and Short Subscriber Identity (SSI) with or without Address extension.
Interrogated group identity, as defined group identity.
LE definition =
- remove late entry definition; or
- LE definition.
LE type =
- broadcast LE;
- acknowledge LE; or
- paging LE.
LE used over ISI =
- applied over ISI; or
- not applied over ISI.
Repetition rate =
- any rate;
- low;
- normal; or
- high.
Result of definition =
- rejected for unknown reason;
- accepted;
- user not authorized;
- unknown TETRA identity;
- parameters not valid;
- insufficient information; or
- SS-LE not supported for the basic service.
ETSI
15 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
Result of interrogation =
- rejected for unknown reason;
- accepted;
- user not authorized;
- unknown TETRA identity;
- SS-LE not supported for the basic service;
- parameters not valid; or
- insufficient information.
Short Number Address (SNA), see ETS 300 392-12-7 [5].
5 Signalling protocol for the support of SS-LE
5.1 General
Clauses 5.2 to 5.6 define the SS-LE layer 3 protocol for the SS-LE services specified in clause 4. The SS-LE protocol
comprises of sub-protocols defined for SS and call control (CC) within CMCE. These SS-LE sub-protocols complement
the call control protocol defined in EN 300 392-2 [6], clause 14.
The present document is only normative for the protocol architecture and user application SAPs within the MS, but
gives an informative description of the protocol and the SAPs within the SwMI.
NOTE: The internal communication between processes within CMCE is outside the scope of the present
document and will only be mentioned as informative statements.
5.2 SS-LE operational requirements
5.2.1 Served user MS/LS
The served user MS/LS shall comply with the requirements in clause 14 of EN 300 392-2 [6] which apply to the
tele- and bearer services which it supports and which are invoked as group calls.
If the served user MS/LS supports SS-LE services it shall comply with the requirements in clause 7.2.2 of
EN 300 392-9 [4].
5.2.2 Served user SwMI
That SwMI shall support as served user SwMI the served user MS/LS complying with the requirements for group calls
set in clause 14 of EN 300 392-2 [6].
If the call is over the ISI, the served user SwMI shall comply with the corresponding ISI requirements for group calls,
set in EN 300 392-3-3 [7] and general ISI requirements set in EN 300 392-3-1 [8].
5.2.3 Group controlling SwMI
Group controlling SwMI shall support as served user SwMI the served user MS/LS complying with the requirements
for group calls set in clause 14 of EN 300 392-2 [6].
If the call is over the ISI, the group controlling SwMI shall comply with the corresponding ISI requirements for group
calls, set in EN 300 392-3-3 [7], general ISI requirements set in EN 300 392-3-1 [8] and the requirements for call
independent signalling set in EN 300 392-9 [4].
ETSI
16 ETSI EN 300 392-12-14 V1.2.1 (2012-03)
5.2.4 Served user home SwMI
No additional requirements are set to the served user home SwMI on the basic call point of view.
5.2.5 Authorized user MS/LS
The authorized user MS/LS shall comply with the requirements for call independent signalling set in EN 300 392-9 [4].
5.2.6 Authorized user SwMI
The authorized user SwMI shall comply general ISI requirements set in EN 300 392-3-1 [8] and to the requirements for
call independent signalling set in EN 300 392-9 [4].
5.2.7 Calling user MS/LS
The calling user (user A) MS/LS shall comply with the requirements in clause 14 of EN 300 392-2 [6] which apply to
the tele- and bearer services which it supports and which are invoked as group calls.
5.3 SS-LE Coding requirements
5.3.1 SS-LE PDUs
5.3.1.1 General on SS_LE PDUs
• SS-LE operation related SS-LE PDUs shall be conveyed inside the basic call PDUs except unless otherwise
defined in the SS-LE PDU descriptions. The SS-LE specific definition and interrogation SS-LE PDUs shall be
conveyed in a U/D-FACILITY PDU over the air interface (see EN 300 392-2 [6], clause 14.7) and in the
ISI-FACILITY PDU over the ISI interface. The present document is normative for the protocol architecture
and user application SAPs within the MS.
The element coding used in the PDUs is in accordance with the general rules spe
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prizemni snopovni radio (TETRA) - Govor in podatki (V+D) - 12. del: Dopolnilne storitve stopnje 3 - 14. poddel: Poznejši vstop (LE)Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 14: Late Entry (LE)33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 392-12-14SIST EN 300 392-12-14:2012en01-maj-2012SIST EN 300 392-12-14:2012SLOVENSKI
STANDARD
European Standard SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)2
Reference REN/TETRA-03214 Keywords late entry, supplementary service, TETRA ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Fax: +33 4 93 65 47 16
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DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)3 Contents Intellectual Property Rights . 5 Foreword . 5 1 Scope . 7 2 References . 7 2.1 Normative references . 7 2.2 Informative references . 8 3 Definitions and abbreviations . 8 3.1 Definitions . 8 3.2 Abbreviations . 8 4 SS-LE service description . 9 4.1 General . 9 4.2 SS-LE services offered over the TNSS-SAP and TNCC-SAP . 10 4.3 SS-LE service primitives . 10 4.3.1 List of SS-LE service primitives . 10 4.3.2 ACKNOWLEDGE LE indication . 11 4.3.3 ACKNOWLEDGE LE response . 11 4.3.4 BROADCAST LE indication . 11 4.3.5 DEFINE request . 12 4.3.6 DEFINE indication . 12 4.3.7 INTERROGATE request . 12 4.3.8 INTERROGATE indication. 13 4.3.9 PAGING LE indication . 13 4.3.10 PAGING LE response . 13 4.4 Parameter descriptions . 13 5 Signalling protocol for the support of SS-LE . 15 5.1 General . 15 5.2 SS-LE operational requirements . 15 5.2.1 Served user MS/LS . 15 5.2.2 Served user SwMI . 15 5.2.3 Group controlling SwMI . 15 5.2.4 Served user home SwMI . 16 5.2.5 Authorized user MS/LS . 16 5.2.6 Authorized user SwMI . 16 5.2.7 Calling user MS/LS . 16 5.3 SS-LE Coding requirements . 16 5.3.1 SS-LE PDUs . 16 5.3.1.1 General on SS_LE PDUs . 16 5.3.1.2 DEFINE PDU . 16 5.3.1.3 DEFINE ACK PDU . 17 5.3.1.4 INFORM1 PDU . 17 5.3.1.5 INFORM2 PDU . 18 5.3.1.6 INFORM2 ACK PDU . 18 5.3.1.7 INFORM3 PDU . 18 5.3.1.8 INFORM3 ACK PDU . 18 5.3.1.9 INFORM4 PDU . 18 5.3.1.10 INTERROGATE PDU . 19 5.3.1.11 INTERROGATE ACK PDU . 19 5.3.2 Information element coding . 20 5.3.2.1 Basic service type . 20 5.3.2.2 Call behaviour . 20 5.3.2.3 Defined group extension . 20 5.3.2.4 Defined group SNA. 20 5.3.2.5 Defined group SSI . 21 SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)4 5.3.2.6 Defined group type identifier . 21 5.3.2.7 Interrogated group extension . 21 5.3.2.8 Interrogated group SNA . 21 5.3.2.9 Interrogated group SSI . 21 5.3.2.10 Interrogated group type identifier . 21 5.3.2.11 LE definition . 21 5.3.2.12 LE used over ISI . 22 5.3.2.13 Notification indicator . 22 5.3.2.14 Range type for defined groups . 22 5.3.2.15 Range type for interrogated groups . 22 5.3.2.16 Repetition rate . 22 5.3.2.17 Result of definition . 22 5.3.2.18 Result of interrogation. 23 5.3.2.19 SS-LE PDU type . 23 5.4 SS-LE protocol states . 24 5.4.1 Protocol states of the served user MS/LS . 24 5.4.2 Protocol states of the home SwMI . 24 5.4.2.1 State IDLE. 24 5.4.2.2 State SS-LE ACTIVE . 24 5.4.3 Protocol states of the authorized user MS/LS . 24 5.4.4 Protocol states of the visited SwMI . 24 5.4.4.1 State IDLE. 24 5.4.4.2 State SS-LE ACTIVE . 24 5.5 SS-LE signalling procedures . 24 5.5.1 Address usage . 24 5.5.2 Procedures for served user MS/LS . 24 5.5.3 Procedures for home SwMI . 25 5.5.3.1 Definition in the home SwMI. 25 5.5.3.2 Interrogation in the home SwMI . 25 5.5.3.3 Invocation and operation in group home SwMI . 26 5.5.4 Procedures for FE3 . 26 5.5.5 Procedures for FE2 in visited SwMI . 27 5.5.5.1 Support of SS-LE definition and interrogation in FE2 in visited SwMI . 27 5.5.5.2 Support of SS-LE operation in FE2 in visited SwMI . 27 5.5.6 Generic SS procedures in the visited SwMI . 27 5.6 Protocol timers . 27 6 SS-LE FE behaviour . 28 6.1 General . 28 6.2 Behaviour of FE1 . 28 6.3 Behaviour of FE2 in home SwMI . 28 6.4 Behaviour of FE3 . 31 6.5 Behaviour of FE2 in visited SwMI . 32 7 Interworking considerations . 33 Annex A (informative): Change Requests . 34 History . 35
ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)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://ipr.etsi.org). 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 (EN) has been produced by ETSI Technical Committee Terrestrial Trunked Radio (TETRA). The present document is part 12, sub-part 14 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"; EN 300 392-12: "Supplementary services stage 3"; EN 300 392-12-1: "Call Identification (CI)"; ETS 300 392-12-2: "Call Report (CR)"; EN 300 392-12-3: "Talking Party Identification (TPI)"; EN 300 392-12-4: "Call Forwarding (CF)"; ETS 300 392-12-5: "List Search Call (LSC)"; EN 300 392-12-6: "Call Authorized by Dispatcher (CAD)"; ETS 300 392-12-7: "Short Number Addressing (SNA)"; EN 300 392-12-8: "Area Selection (AS)"; ETS 300 392-12-9: "Access Priority (AP)"; EN 300 392-12-10: "Priority Call (PC)"; ETS 300 392-12-11: "Call Waiting (CW)"; EN 300 392-12-12: "Call Hold (HOLD)"; SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)6 EN 300 392-12-13: "Call Completion to Busy Subscriber (CCBS)"; EN 300 392-12-14: "Late Entry (LE)"; EN 300 392-12-16: "Pre-emptive Priority Call (PPC)"; EN 300 392-12-17: "Include Call (IC)"; EN 300 392-12-18: "Barring of Outgoing Calls (BOC)"; EN 300 392-12-19: "Barring of Incoming Calls (BIC)"; EN 300 392-12-20: "Discreet Listening (DL)"; EN 300 392-12-21: "Ambience Listening (AL)"; EN 300 392-12-22: "Dynamic Group Number Assignment (DGNA)"; EN 300 392-12-23: "Call Completion on No Reply (CCNR)"; ETS 300 392-12-24: "Call Retention (CRT)"; 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 3, sub-parts 6 and 7 (Speech format implementation), part 4, sub-part 3 (Data networks gateway), 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: 13 March 2012 Date of latest announcement of this EN (doa): 30 June 2012 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 December 2012 Date of withdrawal of any conflicting National Standard (dow): 31 December 2012
ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)7 1 Scope The present document defines the stage 3 specifications of the Supplementary Service Late Entry (SS-LE) for the Terrestrial Trunked Radio (TETRA). SS-LE allows radio users to be informed of and, if they are concerned, to join an already existing point-to-multipoint speech or data call. Man-Machine Interface (MMI) and charging principles are outside the scope of the present document. Supplementary Service stage 3 specification is preceded by the stage 1 and the stage 2 specifications of the service. Stage 1 describes the functional capabilities from the user's point of view. Stage 2 defines the functional behaviour in terms of functional entities and information flows. Stage 3 gives a precise description of the Supplementary Service from the implementation point of view. It defines the protocols for the service and the encoding rules for the information flows. It defines the processes for the functional entities and their behaviour. The described protocols and behaviour apply for the Switching and Management Infrastructure (SwMI) and for the Mobile Station (MS) and can be applied over the Inter-System Interface (ISI) between TETRA systems. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. [1] ETSI EN 300 392-10-14: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 10: Supplementary services stage 1; Sub-part 14: Late Entry (LE)". [2] ETSI EN 300 392-11-14: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 11: Supplementary services stage 2; Sub-part 14: Late Entry (LE)". [3] ETSI EN 300 392-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 1: General network design". [4] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 9: General requirements for supplementary services". [5] ETSI ETS 300 392-12-7: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 12: Supplementary services stage 3; Sub-part 7: Short Number Addressing (SNA)". [6] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air Interface (AI)". [7] 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)". [8] ETSI EN 300 392-3-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 1: General design". SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)8 [9] ETSI EN 300 392-3-5: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 5: Additional Network Feature for Mobility Management (ANF-ISIMM)". 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] ITU-T Recommendation Z.100 (1993): "Specification and description language (SDL)". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: acknowledge LE: indication sent in LE messages by a SwMI to inform a member who would like to join the call that he has to inform the SwMI of his entering the call authorized user: identified user who is able to define and interrogate the SS-LE parameters broadcast LE: indication sent by a SwMI to inform members of a multipoint call which are currently not already involved in this call that they can join directly an existing communication (a channel is already allocated in this cell) home SwMI: TETRA system in which SS-LE can be defined and invoked NOTE: Home SwMI is the TETRA system which has same Mobile Network Identity (MNI) as the TETRA group identity to which SS-LE is defined. paging LE: indication sent by a SwMI to inform members of a multipoint call which are currently not already involved in this call that they need to ask for a communication channel for that call if they wish to participate the call (a channel is not yet allocated in this cell) server user: party that receives the SS-LE indications about an ongoing call and joins the call NOTE: Also known as user B. user B: in a group call a party that receives the SS-LE indications about an ongoing call visited SwMI: TETRA system to which SS-LE can be extended and invoked NOTE: Visited SwMI is a TETRA system which has a different MNI as the TETRA group identity to which SS-LE is defined. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACK Acknowledgement CC Call Control CMCE Circuit Mode Control Entity FE Functional Entity GTSI Group TETRA Subscriber Identity ISI Inter-System Interface LE Late Entry LS Line Station MS Mobile Station PDU Protocol Data Unit SAP Service Access Point SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)9 SS Supplementary Service NOTE 1: The abbreviation SS is only used when referring to a specific supplementary service. SSI Short Subscriber Identity SwMI Switching and Management Infrastructure TNCC TETRA Network layer Call Control TNSS TETRA Network layer Supplementary Service Supplementary service abbreviations For the purposes of the present document, the following abbreviations also 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-CF Call Forwarding SS-CFB Call Forwarding on Busy SS-CFNR Call Forwarding on No Reply (generic for both CFNRy and CFNRc) SS-CFNRc Call Forwarding on Mobile Subscriber Not Reachable SS-CFNRy Call Forwarding on No Reply SS-CFU Call Forwarding Unconditional SS-CI Call Identification SS-CLIP Calling Line Identification Presentation SS-CLIR Calling Line Identification Restriction SS-COLP COnnected Line identification Presentation SS-COLR COnnected Line identification Restriction 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 NOTE 2: Supplementary service abbreviations are also used without "SS-" preamble e.g. "SS-AL" and "AL" are used as appropriate. NOTE 3: The supplementary services list contains also abbreviations that are not used in the present document. 4 SS-LE service description 4.1 General SS-LE supplementary service enables users to join the group call after the original call setup. SS-LE specifies the definition, interrogation and operation of the supplementary service. The Switching and Management Infrastructure (SwMI) applies the SS-LE definitions when a call is active for the group. The SS-LE actions are defined for the SwMI and for the Mobile Station (MS). The SS-LE information flows may be delivered over the Inter-System Interface (ISI). SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)10 This supplementary service is applicable to circuit mode speech and data group call services defined in EN 300 392-2 [6]. The Functional Entities used in the present document are defined in EN 300 392-11-14 [2]. 4.2 SS-LE services offered over the TNSS-SAP and TNCC-SAP SS-LE is an optional supplementary service for TETRA voice plus data layer 3. If SS-LE is supported, this clause shall specify the services and their availability. The following SS-LE services shall be provided: - late entry indications for a basic service (call control service). The following SS-LE services may be provided: - definition: a request to define SS-LE into the SwMI; - definition information: the reception of SS-LE definition for information; - interrogation: interrogation of SS-LE definition. The SS-LE service access point may be used in conformance testing as a normative (but potentially not accessible) boundary in MSs and LSs. NOTE 1: As the present document only deals with the SS-LE all the service primitives have been shown without a TNSS-LE-prefix e.g. the TNSS-LE DEFINE request is shorten into the DEFINE request. NOTE 2: As man-machine interface and MS/LS applications are outside the scope of the present document service primitives are used to define information exchange to and from the standardized part of the MS/LS. Those primitives may be only indirectly accessible. NOTE 3: The layer 3 services and service boundary for the SwMI are outside the scope of the present document. The SS-LE services described in this clause shall complement the call control service specified in EN 300 392-2 [6], clause 11. 4.3 SS-LE service primitives 4.3.1 List of SS-LE service primitives The SS-LE services as defined in EN 300 392-10-14 [1] are accessed in the SS-LE protocol description via service primitives. The SS-LE service primitives at the authorized user MS/LS (FE3) shall be: - DEFINE request; - DEFINE indication; - INTERROGATE request; and - INTERROGATE indication. The SS-LE service primitives at the served user MS/LS (FE1) may be: - BROADCAST LE indication; - ACKNOWLEDGE LE indication; - ACKNOWLEDGE LE response; - PAGING LE indication; and SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)11 - PAGING LE response. Clauses 4.3.2 to 4.3.10 present the service primitive descriptions in alphabetic order. 4.3.2 ACKNOWLEDGE LE indication
The ACKNOWLEDGE LE indication primitive may be offered from FE1 to application over TNSS-SAP with the corresponding basic call primitive TNCC-SETUP indication indicating an acknowledged group call. The ACKNOWLEDGE LE indication primitive shall contain the SS-LE parameters listed in table 1. The ACKNOWLEDGE indication implies, that application shall send an ACKNOWLEDGE LE response, if it wants to joint in the call. Table 1: ACKNOWLEDGE LE indication contents Parameter
C/O/M Remark LE type
M Acknowledge LE
4.3.3 ACKNOWLEDGE LE response The ACKNOWLEDGE LE response primitive may be offered from application to FE1 over TNSS-SAP with the corresponding basic call primitive TNCC-SETUP response. Application shall send the primitive if the subscriber joins the call. Application should discard any other ACKNOWLEDGE LE indications to the same call item: - while it is making a response to the received ACKNOWLEDGE LE indication; and - after sending an ACKNOWLEDGE LE response for the same call. However, if the subscriber receives another ACKNOWLEDGE LE indication after leaving the call and if the user wants to re-join in the group call, application shall send a new ACKNOWLEDGE LE response. If the subscriber leaves the acknowledged call, e.g. due to another call, the application shall send a TNCC-RELEASE request which invokes sending of a U-RELEASE PDU to SwMI to indicate that the user leaves the call. If the paging LE is changed to acknowledge LE within a call and if the application has sent a PAGING LE response for that call, the sent PAGING LE response shall be considered also as an ACKNOWLEDGE LE response. In case of acknowledge LE, the response shall be sent in the allocated traffic channel, if any. The ACKNOWLEDGE LE response primitive shall contain no SS-LE parameters. 4.3.4 BROADCAST LE indication The BROADCAST LE indication primitive may be offered from FE1 to application over TNSS-SAP with the corresponding basic call primitive TNCC-SETUP indication. The BROADCAST LE indication primitive shall contain the SS-LE parameters listed in table 2. Table 2: BROADCAST LE indication contents Parameter
C/O/M Remark LE type O Broadcast LE
ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)12 4.3.5 DEFINE request DEFINE request primitive may be offered from application to FE3 over TNSS-SAP. The primitive shall contain the SS-LE parameters listed in table 3. Defined group TETRA identity parameter is a repeatable parameter, which can define one group number, a list of 2 to 15 group numbers or a range of group numbers. Each defined group TETRA identity element shall comprise of any of the following: - address type identifier and Short Number Address (SNA); - address type identifier and Short Subscriber Identity (SSI); or - address type identifier and SSI and address extension (GTSI). SNA, if used and supported, shall refer to the SS-SNA defined for sending authorized user. The SS-LE definition shall be requested to all group numbers given as defined group TETRA identity according to the parameters listed after the defined group TETRA identity. Table 3: DEFINE request contents Parameter
C/O/M Remark Defined group identity M Repeatable LE definition M See note LE used over ISI M See note Basic service type M See note Repetition rate M See note NOTE: This parameter value is common to all defined group identities in this service primitive.
4.3.6 DEFINE indication
DEFINE indication primitive may be offered from FE3 to application over TNSS-SAP. The primitive shall contain the SS-LE parameters listed in table 4. Defined group TETRA identity element is a repeatable parameter that shall define one group identity, a list of 2 to 15 group identities or a range of group identities. There shall be at least one defined group identity in a DEFINE primitive. It is required that result for definition apply for all group identities given as defined group identity. If the result for definition parameter would be different, FE3 shall deliver separate DEFINE indication primitives to application. Table 4: DEFINE indication contents Parameter
C/O/M Remark Defined group identity M Repeatable Result of definition
M
4.3.7 INTERROGATE request INTERROGATE request primitive may be offered from application to FE3 over TNSS-SAP. The primitive shall contain the SS-LE parameters listed in table 5. Interrogated group identity element is a repeatable parameter that shall define one group identity, a list of 2 to 14 group identities or a range of group identities. There shall be at least one interrogated group identity in an INTERROGATE primitive. SNA, if used, shall refer to the SNA defined for the sending authorized user. Table 5: INTERROGATE request contents
Parameter
C/O/M Remark Interrogated group identity M Repeatable SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)13 4.3.8 INTERROGATE indication
INTERROGATE indication primitive may be offered from FE3 to application over TNSS-SAP. The primitive shall contain the SS-LE parameters listed in table 6. Interrogated group TETRA identity element is a repeatable parameter that shall define one group number, a list of 2 to 14 group identities or a range of group identities. There shall be at least one interrogated group identity in an INTERROGATE primitive.
The interrogation result and any following parameters in the primitive apply for all group numbers given as interrogated group identity. If the parameters would be different, FE3 shall deliver separate INTERROGATE indication primitives to application. Table 6: INTERROGATE indication contents Parameter
C/O/M Remark Interrogated group identity M Repeatable Result of interrogation M See note 1 LE type C See note 2 LE used over ISI C See note 2 Basic service type C See note 2 Repetition rate C See note 2 NOTE 1: If the interrogation request failed, the reason is specified here. NOTE 2: These parameters are present only when the interrogation is accepted.
4.3.9 PAGING LE indication If the FE1 supports SS-LE paging function the PAGING LE indication primitive shall be offered from FE1 to application over TNSS-SAP with the corresponding basic call primitive TNCC-SETUP indication. The primitive shall contain the SS-LE parameters listed in table 7. The PAGING LE indication implies, that application shall send a PAGING LE response, if the subscriber wishes to join in the call. Table 7: PAGING LE indication contents Parameter
C/O/M Remark LE type
M LE Paging
4.3.10 PAGING LE response The PAGING LE response primitive may be offered from application to FE1 over TNSS-SAP with the corresponding basic call primitive TNCC-SETUP response. The application shall send the primitive only if the subscriber wishes to join the call. The primitive shall contain no SS-LE parameters. Application should discard any other PAGING LE indications to the same call while it is making the response to the received PAGING LE indication or while it is waiting for a BROADCAST LE or ACKNOWLEDGE LE indication after sending the LE PAGING response. If the FE1 receives a BROADCAST LE indication after sending a PAGING LE response to the same call, it may try to cancel the sending of the PAGING LE response and shall deliver the BROADCAST indication to the application. The application shall not send any response to ACKNOWLEDGE LE indications, when it has sent an LE PAGING LE response to the same call. 4.4 Parameter descriptions
Address extension = - Mobile Network Identity comprising Mobile Country Code (MCC) and Mobile Network Code (MNC). - See EN 300 392-1 [3], clause 7. SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)14
Basic service type = - multipoint circuit mode speech call; or - multipoint circuit mode data call.
Defined group identity =
- Short Number Address (SNA); - Short Subscriber Identity (SSI); or - Short Subscriber Identity (SSI) + Address extension i.e. full GTSI. - See EN 300 392-1 [3], clause 7. NOTE: The SwMI may not support Short Number Address (SNA) nor mixing of Short Number Address (SNA) and Short Subscriber Identity (SSI) with or without Address extension.
Interrogated group identity, as defined group identity.
LE definition = - remove late entry definition; or - LE definition.
LE type = - broadcast LE; - acknowledge LE; or - paging LE.
LE used over ISI = - applied over ISI; or - not applied over ISI.
Repetition rate = - any rate; - low; - normal; or - high.
Result of definition = - rejected for unknown reason; - accepted; - user not authorized; - unknown TETRA identity; - parameters not valid; - insufficient information; or - SS-LE not supported for the basic service. SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)15
Result of interrogation = - rejected for unknown reason; - accepted; - user not authorized; - unknown TETRA identity; - SS-LE not supported for the basic service; - parameters not valid; or - insufficient information.
Short Number Address (SNA), see ETS 300 392-12-7 [5]. 5 Signalling protocol for the support of SS-LE 5.1 General Clauses 5.2 to 5.6 define the SS-LE layer 3 protocol for the SS-LE services specified in clause 4. The SS-LE protocol comprises of sub-protocols defined for SS and call control (CC) within CMCE. These SS-LE sub-protocols complement the call control protocol defined in EN 300 392-2 [6], clause 14. The present document is only normative for the protocol architecture and user application SAPs within the MS, but gives an informative description of the protocol and the SAPs within the SwMI. NOTE: The internal communication between processes within CMCE is outside the scope of the present document and will only be mentioned as informative statements. 5.2 SS-LE operational requirements 5.2.1 Served user MS/LS The served user MS/LS shall comply with the requirements in clause 14 of EN 300 392-2 [6] which apply to the tele- and bearer services which it supports and which are invoked as group calls. If the served user MS/LS supports SS-LE services it shall comply with the requirements in clause 7.2.2 of EN 300 392-9 [4]. 5.2.2 Served user SwMI That SwMI shall support as served user SwMI the served user MS/LS complying with the requirements for group calls set in clause 14 of EN 300 392-2 [6].
If the call is over the ISI, the served user SwMI shall comply with the corresponding ISI requirements for group calls, set in EN 300 392-3-3 [7] and general ISI requirements set in EN 300 392-3-1 [8]. 5.2.3 Group controlling SwMI Group controlling SwMI shall support as served user SwMI the served user MS/LS complying with the requirements for group calls set in clause 14 of EN 300 392-2 [6]. If the call is over the ISI, the group controlling SwMI shall comply with the corresponding ISI requirements for group calls, set in EN 300 392-3-3 [7], general ISI requirements set in EN 300 392-3-1 [8] and the requirements for call independent signalling set in EN 300 392-9 [4]. SIST EN 300 392-12-14:2012

ETSI ETSI EN 300 392-12-14 V1.2.1 (2012-03)16 5.2.4 Served user home SwMI No additional requirements are set to the served user home SwMI on the basic call point of view. 5.2.5 Authorized user MS/LS The authorized user MS/LS shall comply with the requirements for call independent signalling set in EN 300 392-9 [4]. 5.2.6 Authorized user SwMI The authorized user SwMI shall comply general ISI requirements set in EN 300 392-3-1 [8] and to the requirements for call independent signalling set in EN 300 392-9 [4]. 5.2.7 Calling user MS/LS The calling user (user A) MS/LS shall comply with the requirements in clause 14 of EN 300 392-2 [6] which apply to the tele- and bearer services which it supports and which are invoked as group calls. 5.3 SS-LE Coding requirements
5.3.1 SS-LE PDUs 5.3.1.1 General on SS_LE PDUs • SS-LE operation related SS-LE PDUs shall be conveyed inside the basic call PDUs except unless otherwise defined in the SS-LE PDU descriptions. The SS-LE specific definition and interrogation SS-LE PDUs shall be conveyed in a U/D-FACILITY PDU over the air interface (see EN 300 392-2 [6], clause 14.7) and in the ISI-FACILITY PDU over the ISI interface. The present document is normative for the protocol architecture and user application SAPs within the MS. The element coding used in the PDUs is in accordance with the general rules specified in annex E of EN 300 392-2 [6]. The information contained in the following argument PDU definition tables correspond to the following key:
Length: length of the sub-argument in bits; Type: element type (1, 2 or 3) described in EN 300 392-2 [6], annex E; C/O/M: conditional/optional/mandatory; Remark: comment. 5.3.1.2 DEFINE PDU DEFINE PDU shall be offered from FE3 to FE2. The PDU shall be addressed to FE2 even if FE3 is in a visited SwMI. If the acknowledgements are differen
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