ETSI TS 103 328 V1.2.2 (2020-05)

Rail Telecommunications (RT); GPRS/EGPRS requirements for European Train Control System (ETCS)

RTS/RT-0055

General Information

• Status: Not Published
• Technical Committee: RT - Railway telecommunications
• Current Stage: 12 - Completion
• Due Date: 22-May-2020
• Completion Date: 07-May-2020

Standards Content (Sample)

ETSI TS 103 328 V1.2.2 (2020-05)






TECHNICAL SPECIFICATION
Rail Telecommunications (RT);
GPRS/EGPRS requirements for
European Train Control System (ETCS)

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2 ETSI TS 103 328 V1.2.2 (2020-05)



Reference
RTS/RT-0055
Keywords
GSM-R, radio, railways
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3 ETSI TS 103 328 V1.2.2 (2020-05)
Contents
Intellectual Property Rights . 4
Modal verbs terminology . 4
Foreword . 4
Introduction . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 General requirements . 8
4.1 ETCS application characteristics . 8
4.2 Coexistence between ETCS and non-ETCS applications . 9
4.3 Reference 3GPP Release . 9
4.4 Applicability . 9
5 Bearer services and features for ETCS operation . 9
5.1 Basic features . 9
5.1.0 General . 9
5.1.1 Network - Bearer Service capabilities . 9
5.1.2 Mobile - Bearer Service capabilities . 10
5.1.3 Quality of Service Management . 11
5.1.4 Multislot Operation . 11
5.1.5 Optimized LLC-PDU delivery . 11
5.1.6 Mobility . 11
5.1.7 Gathering radio resources . 12
5.1.8 Radio resource allocation . 12
5.1.9 Automatic GPRS Attach . 12
5.1.10 Summary basic features . 13
5.2 Mixed packet data traffic operation . 14
5.2.0 General . 14
5.2.1 Quality of Service Management . 14
5.2.2 Summary mixed packet data traffic operation . 14
Annex A (informative): Bibliography . 16
Annex B (informative): Change History . 17
History . 18


ETSI

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4 ETSI TS 103 328 V1.2.2 (2020-05)
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.
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.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Railway Telecommunications
(RT).
Introduction
Railway undertakings are facing the challenge to evolve their networks to support the ETCS operation in high density
railway traffic areas. The limited GSM-R spectrum resources put additional pressure on air interface traffic capabilities
and as well radio spectrum efficiency. Also, the continuous development of further voice services e.g. GSM-R based
shunting communication using circuit switched technology requires increased traffic resource capabilities.
When ETCS is using circuit switched data mode, radio traffic channel capacity utilization is low compared to the
requested/assigned bandwidth. Having more than one ETCS session multiplexed to one radio resource using packet
switched mode is therefore desirable. Taking into account GSM evolution GPRS/EGPRS bearer services provide packet
oriented data transmission that allocates transmission resources on demand and release those resources if no further data
are to be exchanged. ETCS message sizes are rather small and the typical message frequency are in the range of several
seconds. This allows to multiplex several ETCS sessions to one transmission resource and facilitating use of ETCS
level 2 in high density rail traffic areas.
The present document identifies the features required to allow the support of ETCS using GPRS/EGPRS bearer
services, in particular the basic ones and those needed to fulfil End-to-End performance requirements.

ETSI

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5 ETSI TS 103 328 V1.2.2 (2020-05)
1 Scope
The present document defines the minimum set of 3GPP GPRS features to support ETCS application and to guarantee
QoS required. Two operational cases are applicable in GSM-R networks:
• GSM-R GPRS packet switched bearer service is only utilized by ETCS PS-mode operation - ETCS only
operation.
• GSM-R GPRS packet switched bearer service is utilized by simultaneous ETCS and other packet data oriented
applications - Simultaneous operation of ETCS and non-ETCS applications.
Both operational scenarios require basic GPRS features but in case of simultaneous ETCS and non-ETCS operation,
ETCS packet data session requires priority over non-ETCS packet data traffic.
The present document is focussing on the relevant references needed for the GSM-R PS-domain. It does not describe
the detailed requirements for each of the referred GSM feature.
The minimum requirements on ETSI/3GPP for the use of GSM for application on railway networks are based on the
Release 99 version of the Technical Specifications and are described in ETSI EN 301 515 [i.1]. The features serving as
the basis for GSM-R PS-domain are described in releases later than Release 99. So the present document is referring to
specifications versions later than Release 4 but is not mandating any other functionality than covered by the applicable
3GPP Work Items and referenced in the applicable clauses as listed in clauses 5.1.10 and 5.2.2.
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 TS 123 002 (V4.8.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Network architecture (3GPP TS 23.002
version 4.8.0 Release 4)".
[2] ETSI TS 123 060 (V4.11.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); General Packet Radio Service (GPRS); Service
description; Stage 2 (3GPP TS 23.060 version 4.11.0 Release 4)".
[3] ETSI TS 123 107 (V4.6.0): "Universal Mobile Telecommunications System (UMTS); Quality of
Service (QoS) concept and architecture (3GPP TS 23.107 version 4.6.0 Release 4)".
[4] ETSI TS 123 207 (V5.10.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); End-to-end Quality of Service (QoS) concept and
architecture (3GPP TS 23.207 version 5.10.0 Release 5)".
[5] ETSI TS 124 008 (V4.17.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Mobile radio interface Layer 3 specification; Core
network protocols; Stage 3 (3GPP TS 24.008 version 4.17.0 Release 4)".
[6] ETSI TS 103 368 (V1.1.1): "Railway Telecommunications; Commands necessary for mobile radio
equipment operation on railways".
ETSI

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6 ETSI TS 103 328 V1.2.2 (2020-05)
[7] ETSI TS 129 002 (V4.18.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Mobile Application Part (MAP) specification
(3GPP TS 29.002 version 4.18.0 Release 4)".
[8] ETSI TS 129 060 (V4.11.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); General Packet Radio Service (GPRS); GPRS
Tunnelling Protocol (GTP) across the Gn and Gp interface (3GPP TS 29.060 version 4.11.0
Release 4)".
[9] ETSI TS 129 061 (V4.10.1): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Interworking between the Public Land Mobile
Network (PLMN) supporting packet based services and Packet Data Networks (PDN) (3GPP
TS 29.061 version 4.10.1 Release 4)".
[10] ETSI TS 143 064 (V4.5.0): "Digital cellular telecommunications system (Phase 2+); Overall
description of the GPRS radio interface; Stage 2 (3GPP TS 43.064 version 4.5.0 Release 4)".
[11] ETSI TS 144 018 (V4.23.0): "Digital cellular telecommunications system (Phase 2+); Mobile
radio interface layer 3 specification; Radio Resource Control (RRC) protocol (3GPP
TS 44.018 version 4.23.0 Release 4)".
[12] ETSI TS 144 060 (V4.23.0): "Digital cellular telecommunications system (Phase 2+); General
Packet Radio Service (GPRS); Mobile Station (MS) - Base Station System (BSS) interface; Radio
Link Control / Medium Access Control (RLC/MAC) protocol (3GPP TS 44.060 version 4.23.0
Release 4)".
[13] ETSI TS 144 064 (V4.4.0): "Digital cellular telecommunications system (Phase 2+); Mobile
Station - Serving GPRS Support Node (MS-SGSN); Logical Link Control (LLC) Layer
Specification (3GPP TS 44.064 version 4.4.0 Release 4)".
[14] ETSI TS 144 065 (V4.3.0): "Digital cellular telecommunications system (Phase 2+); Mobile
Station (MS) - Serving GPRS Support Node (SGSN); Subnetwork Dependent Convergence
Protocol (SNDCP) (3GPP TS 44.065 version 4.3.0 Release 4)".
[15] ETSI TS 148 018 (V4.7.0): "Digital cellular telecommunications system (Phase 2+); General
Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node
(SGSN); BSS GPRS Protocol (3GPP TS 48.018 version 4.7.0 Release 4)".
[16] ETSI TS 145 001 (V4.5.0): "Digital cellular telecommunications system (Phase 2+); Physical
layer on the radio path; General description (3GPP TS 45.001 version 4.5.0 Release 4)".
[17] ETSI TS 145 002 (V4.8.0): "Digital cellular telecommunications system (Phase 2+); Multiplexing
and multiple access on the radio path (3GPP TS 45.002 version 4.8.0 Release 4)".
[18] ETSI TS 145 003 (V4.4.0): "Digital cellular telecommunications system (Phase 2+); Channel
coding (3GPP TS 45.003 version 4.4.0 Release 4)".
[19] ETSI TS 145 004 (V4.2.0): "Digital cellular telecommunications system (Phase 2+); Modulation
(3GPP TS 45.004 version 4.2.0 Release 4)".
[20] ETSI TS 145 005 (V4.19.0): "Digital cellular telecommunications system (Phase 2+); Radio
transmission and reception (3GPP TS 45.005 version 4.19.0 Release 4)".
[21] ETSI TS 145 008 (V4.19.0): "Digital cellular telecommunications system (Phase 2+); Radio
subsystem link control (3GPP TS 45.008 version 4.19.0 Release 4)".
[22] ETSI TS 145 010 (V4.5.0): "Digital cellular telecommunications system (Phase 2+); Radio
subsystem synchronization (3GPP TS 45.010 version 4.5.0 Release 4)".
[23] ETSI TS 148 016 (V4.4.0): "Digital cellular telecommunications system (Phase 2+); General
Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN)
Interface; Network Service (3GPP TS 48.016 version 4.4.0 Release 4)".
ETSI

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7 ETSI TS 103 328 V1.2.2 (2020-05)
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 301 515: "Global System for Mobile communication (GSM); Requirements for GSM
operation on railways".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
ETCS application: application comprising the EuroRadio protocol suite
non-ETCS application(s): application comprising any other protocol suites than EuroRadio
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ARP Allocation Retention Priority
BSS Base Station Subsystem
CS Coding Schemes
EGPRS Evolved GPRS
ETCS European Train Control
...