ETSI TS 100 392-3-11 V1.1.1 (2018-05)

ETSI TS 100 392-3-11 V1.1.1 (2018-05)






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Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI);
Sub-part 11: General design, SIP/IP

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2 ETSI TS 100 392-3-11 V1.1.1 (2018-05)



Reference
DTS/TCCE-03239
Keywords
management, mobility, TETRA

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3 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
Contents
Intellectual Property Rights . 5�
Foreword . 5�
Modal verbs terminology . 6�
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 . 9�
4 Usage of Session Initiation Protocol (SIP) and Session Description Protocol (SDP) for TETRA . 10�
4.1 SIP functionality .10�
4.2 Protocol stack for call control signalling information .11�
4.3 Protocol stack for user information .11�
5 ISI Generic Functional Protocol (ISI GFP) . 12�
5.1 Protocol model.12�
5.2 Services provided by the ISI Mediation Function .13�
5.2.1 ISI Mediation Function Overview .13�
5.2.2 Session Description Protocol .14�
5.2.2.1 General .14�
5.2.2.2 Protocol Version ("v=") .14�
5.2.2.3 Origin ("o=") .14�
5.2.2.4 Session Name ("s=") .14�
5.2.2.5 Connection Data ("c=") .14�
5.2.2.6 Timing ("t=") .14�
5.2.2.7 Media Type ("m=") and associated Attributes ("a=") .14�
5.2.2.8 Example of SDP Content .15�
6 Session Initiation Protocol (SIP) . 15�
6.1 SIP Introduction .15�
6.2 SIP methods .15�
6.3 SIP header fields .18�
6.3.1 SIP header fields overview .18�
6.3.2 To .18�
6.3.3 From .19�
6.3.4 Via .19�
6.3.5 Call-ID .19�
6.3.6 CSeq .19�
6.3.7 Max-Forwards .19�
6.3.8 Contact .19�
6.3.9 Content-Type .19�
6.3.10 Content-Disposition .19�
6.3.11 Content-Length .20�
6.3.12 Allow .20�
6.3.13 Accept .20�
6.3.14 Recv-Info .20�
6.3.15 Info-Package .20�
6.3.16 MIME-Version .20�
6.4 Availability and capability .21�
6.4.1 Availability .21�
6.4.2 Capability .21�
6.5 Addressing and transport .21�
6.5.1 Addressing .21�
6.5.2 Transport of ISI PDUs .21�
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4 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
6.6 Procedures .22�
6.6.1 General .22�
6.6.2 Call/Session Establishment .22�
6.6.3 Call/Session Termination .25�
6.6.4 Message Sending .26�
6.7 Session Timer .26�
6.7.1 Session Timer Overview .26�
6.7.2 Header fields for Session Timer .26�
6.7.2.1 Supported .26�
6.7.2.2 Min-SE .26�
6.7.2.3 Session-Expires .27�
6.7.3 Procedures .27�
7 Special Considerations . 29�
7.1 ISI Invoke ID .29�
Annex A (informative): SIP Message Content . 30�
A.1 SIP basic call message . 30�
Annex B (informative): Change requests . 31�
Annex C (informative): Bibliography . 32�
History . 33�


ETSI

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5 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee TETRA and Critical
Communications Evolution (TCCE).
The present document is part 3, sub-part 11 of a multi-part deliverable covering the Terrestrial Trunked Radio
(TETRA); Voice plus Data (V+D), as identified below:
Part 1: "General network design";
Part 2: "Air Interface (AI)";
Part 3: "Interworking at the Inter-System Interface (ISI)":
Sub-part 1: "General design";
Sub-part 2: "Additional Network Feature Individual Call (ANF-ISIIC)";
Sub-part 3: "Additional Network Feature Group Call (ANF-ISIGC)";
Sub-part 4: "Additional Network Feature Short Data Service (ANF-ISISDS)";
Sub-part 5: "Additional Network Feature for Mobility Management (ANF-ISIMM)";
Sub-part 6: "Speech format implementation for circuit mode transmission";
Sub-part 7: "Speech Format Implementation for Packet Mode Transmission";
Sub-part 8: "Generic Speech Format Implementation";
Sub-part 9: "Transport layer independent, General design";
Sub-part 10: "General design, PSS1 over E.1";
Sub-part 11: "General design, SIP/IP";
Sub-part 12: "Transport layer independent Additional Network Feature Individual Call (ANF-ISIIC)";
Sub-part 13: "Transport layer independent Additional Network Feature Group Call (ANF-ISIGC)";
Sub-part 14: "Transport layer independent Additional Network Feature Short Data Service (ANF-ISISDS)";
ETSI

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6 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
Sub-part 15: Transport layer independent Additional Network Feature, Mobility Management (ANF-
ISIMM)";
Part 4: "Gateways basic operation";
Part 5: "Peripheral Equipment Interface (PEI)";
Part 7: "Security";
Part 9: "General requirements for supplementary services";
Part 10: "Supplementary services stage 1";
Part 11: "Supplementary services stage 2";
Part 12: "Supplementary services stage 3";
Part 13: "SDL model of the Air Interface (AI)";
Part 14: "Protocol Implementation Conformance Statement (PICS) proforma specification";
Part 15: "TETRA frequency bands, duplex spacings and channel numbering";
Part 16: "Network Performance Metrics";
Part 17: "TETRA V+D and DMO specifications";
Part 18: "Air interface optimized applications";
NOTE 1: 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.
NOTE 2: Some parts are also published as Technical Specifications such as ETSI TS 100 392-2 and those may be
the latest version of the document.
For all subparts in the TETRA specification ETSI EN 300 392-3 [i.1], "Interworking at the Inter-System Interface (ISI)"
the terms ISI and TETRA ISI are equivalent.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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7 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
1 Scope
The present document defines the transport of Inter System Interface (ISI) PDUs using the Session Initiation
Protocol (SIP) as transport layer and the Session Description Protocol (SDP) as media control protocol. It specifies:
� SIP methods and header fields used for transport of ISI PDUs; and
� the SDP content; and
� use the ISI Mediation Function which coordinates the communication between TETRA systems.
The ISI Mediation Function specification applies to an IP based TETRA Switching and Management Infrastructure
(SwMI) which supports the ISI.
2 References
2.1 Normative 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
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://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.
The following referenced documents are necessary for the application of the present document.
[1] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air
Interface (AI)".
[2] ETSI TS 100 392-3-8: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 8: Generic Speech Format
Implementation".
[3] ETSI TS 100 392-3-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 9: Transport layer independent,
General design".
[4] ETSI TS 100 392-3-12: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 12: Transport Layer Independent
Additional Network Feature Individual Call (ANF-ISIIC)".
[5] ETSI TS 100 392-3-13: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D)
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 13: Transport layer independent
Additional Network Feature Group Call (ANF-ISIGC)".
[6] ETSI TS 100 392-3-14: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 14: Transport layer independent
Additional Network Feature Short Data Service (ANF-ISISDS)".
[7] ETSI TS 100 392-3-15: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 15: Transport layer independent
Additional Network Feature, Mobility Management (ANF-ISIMM)".
[8] IETF RFC 3261: "SIP: Session Initiation Protocol".
[9] IETF RFC 3264: "An Offer/Answer Model with Session Description Protocol (SDP)".
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8 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
[10] IETF RFC 3428: "Session Initiation Protocol (SIP) Extension for Instant Messaging".
[11] IETF RFC 4028: "Session Timers in the Session Initiation Protocol (SIP)".
[12] IETF RFC 4566: "SDP: Session Description Protocol".
[13] IETF RFC 5621: "Message Body Handling in the Session Initiation Protocol (SIP)".
[14] IETF RFC 6026: "Correct Transaction Handling for 2xx Responses to Session Initiation Protocol
(SIP) INVITE Requests".
[15] IETF RFC 6086: "Session Initiation Protocol (SIP) INFO Method and Package Framework".
[16] IETF RFC 6141: "Re-INVITE and Target-Refresh Request Handling in the Session Initiation
Protocol (SIP)".
[17] IETF RFC 2045: "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet
Message Bodies".
2.2 Informative 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
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
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] ETSI EN 300 392-3: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
destination SwMI: Switching and Management Infrastructure where the receiving ANF-ISI entity is located (in the
context of a single one-way exchange of information between two ANF-ISI entities located in different Switching and
Management Infrastructures)
group attached SwMI: Switching and Management Infrastructure different from the home SwMI of the group
considered in which at least one individual subscriber member of the group is attached to that group
Group TETRA Subscriber Identity (GTSI): TETRA Subscriber Identity assigned to a group
home SwMI: Switching and Management Infrastructure in which the subscription of a given user is registered
NOTE: That user is defined as being a subscriber (see below the definition of that term).
invocation: action taken by the user or by the service provider to execute a specific service function within real time
Location Area (LA): area within radio coverage of a base station or group of base stations within which a Mobile
Station (MS) is allowed to operate
Mobile Network Identity (MNI): identity that is broadcast by all TETRA base stations to uniquely identify the SwMI
NOTE: It consists of the Mobile Country Code (MCC) and the Mobile Network Code (MNC).
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9 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
Mobile Station (MS): physical grouping that contains all of the mobile equipment that is used to obtain TETRA
services
NOTE: By definition, a mobile station contains at least one Mobile Radio Stack (MRS).
originating SwMI: in the context of a TETRA call, Switching and Management Infrastructure where the calling user is
registered (which implies that this user is located in that SwMI) or Switching and Management Infrastructure which
originates a Call independent signalling connection
service user: abstract representation of the totality of those entities in a single system that makes use of a service
through a single access point
Short Subscriber Identity (SSI): network specific portion of a TSI
NOTE: A SSI is only unique within one TETRA sub-domain (one TETRA network).
source SwMI: Switching and Management Infrastructure where the sending ANF-ISI entity is located (in the context of
a single one-way exchange of information between two ANF-ISI entities located in different Switching and
Management Infrastructures)
subscriber: user of a telecommunication service, based on a contract with the provider of the service
NOTE 1: The subscriber may be an individual or a group: in the first case it is identified by an ITSI, in the second,
by a GTSI.
NOTE 2: The individual subscriber is able to access an SwMI either through a MS or Line Station.
supplementary service: service which modifies or supplements a basic bearer service or a basic teleservice
NOTE: A supplementary service cannot be offered to a customer as a stand-alone service. It should be offered in
combination with a bearer service or a teleservice.
Switching and Management Infrastructure (SwMI): all of the TETRA equipment for a Voice plus Data (V+D)
network
NOTE: The SwMI enables users to communicate with each other.
terminating SwMI: in the context of a TETRA call, Switching and Management Infrastructure where the calling user
is registered (which implies that this user is located in that SwMI) or Switching and Management Infrastructure which
terminates a Call independent signalling connection
TETRA Subscriber Identity (TSI): global TETRA network address that is to identify an individual or a group
subscriber within the domain of all TETRA networks
user: entity using the services of a telecommunications network via an externally accessible service access point
NOTE: An individual user may be a person or an application process.
user information: TETRA coded speech
visited SwMI: TETRA network which MNI is not equal to the user's MNI
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ANF Additional Network Feature
ANF-ISI all Additional Network Features of the Inter-System Interface
AVP Audio Video Profile
C Conditional
GFP Generic Functional Protocol
GTSI Group TETRA Subscriber Identity
IANA Internet Assigned Numbers Authority
IC Individual Call
IP Internet Protocol
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10 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
ISI Inter-System Interface
ISIGC Inter System Interface Group Call
ISIIC Inter System Interface Individual Call
ISIMM Inter System Interface Mobility Management
ISISDS Inter System Interface Short Data Service
ITSI Individual TETRA Subscriber Identity
LA Location Area
M Mandatory
MCC Mobile Country Code
MNC Mobile Network Code
MNI Mobile Network Identity
MRS Mobile Radio Stack
MS Mobile Station
O Optional
PDU Protocol Data Unit
RFC Request For Comments
RTP Real-time Transport Protocol
SDL Specification and Description Language
SDP Session Description Protocol
SIP Session Initiation Protocol
SSI Short Subscriber Identity
SwMI TETRA Switching and Management Infrastructure
TCP Transmission Control Protocol
TLS Transport Layer Security
TSI TETRA Subscriber Identity
UDP User Datagram Protocol
URI Uniform Resource Identifier
V+D Voice plus Data
4 Usage of Session Initiation Protocol (SIP) and
Session Description Protocol (SDP) for TETRA
4.1 SIP functionality
The TETRA ISI application can use the Session Initiation Protocol (SIP) as transport mechanism for call control
information between interconnected SwMIs. When using SIP as transport for call control information, Session
Description Protocol (SDP) shall be used for the specification of the audio connection between interconnected SwMIs.
TETRA uses the SIP standard functionalities as defined in the following RFCs:
� IETF RFC 2045 [17].
� IETF RFC 3261 [8]. The following SIP request methods are used:
- OPTIONS.
- INVITE.
- ACK.
- CANCEL.
- BYE.
� IETF RFC 3428 [10].
� IETF RFC 4028 [11].
� IETF RFC 5621 [13].
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11 ETSI TS 100 392-3-11 V1.1.1 (2018-05)
� IETF RFC 6026 [14].
� IETF RFC 6086 [15].
� IETF RFC 6141 [16].
NOTE 1: Provisional responses to SIP:INVITE except 100 Trying
...