ETSI TR 103 865 V1.1.1 (2024-09)

Rail Telecommunications (RT); Future Railway Mobile Communication System (FRMCS); Radio performance aspects

DTR/RT-0079

General Information

• Status: Not Published
• Technical Committee: RT - Railway telecommunications
• Current Stage: 12 - Completion
• Due Date: 30-Sep-2024
• Completion Date: 06-Sep-2024

Standards Content (Sample)

TECHNICAL REPORT
Rail Telecommunications (RT);
Future Railway Mobile Communication System (FRMCS);
Radio performance aspects
2 ETSI TR 103 865 V1.1.1 (2024-09)

Reference
DTR/RT-0079
Keywords
FRMCS, radio parameters
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ETSI
3 ETSI TR 103 865 V1.1.1 (2024-09)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Executive summary . 5
Introduction . 5
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 8
3.3 Abbreviations . 9
4 Interference Mitigation . 10
4.1 Frequency Reuse Techniques . 10
4.1.1 Presentation. 10
4.1.1.0 Introduction . 10
4.1.1.1 Hard Frequency Reuse . 10
4.1.1.2 Soft Frequency Reuse . 10
4.1.1.3 Partial Frequency Reuse . 10
4.1.2 Remarks and Potential Implementation of Frequency-Reuse Techniques . 11
4.1.2.1 Introduction . 11
4.1.2.2 Performance of frequency reuse . 11
4.1.2.3 Dynamic Frequency-Reuse implementation . 12
4.1.2.4 Static Frequency-Reuse implementation . 12
4.1.2.5 Frequency-Reuse techniques and RMR operating bands . 12
4.2 Coordinated Multi-Point techniques . 13
4.2.1 Downlink Coordinated Multi-Point techniques . 13
4.2.2 Uplink Coordinated Multi-Point Reception . 15
4.2.3 Backhaul requirements and CoMP zone . 16
4.3 Interference Rejection with MMSE-IRC Receivers . 16
4.3.1 Analysis . 16
4.3.2 Remarks . 17
4.4 Interference Mitigation through beam management . 17
4.5 Interference mitigation techniques comparison . 17
4.5.1 Comparison metrics . 17
4.5.2 Scenarios . 17
4.5.2.0 Introduction . 17
4.5.2.1 Urban scenario . 17
4.5.2.2 Station scenario in urban environment . 18
4.5.2.3 Shunting scenario . 18
4.5.2.4 Rural scenario conventional lines . 18
4.5.2.5 Rural scenario high speed lines . 18
4.5.3 Comparison tables . 18
4.5.4 Conclusion . 21
5 TDD operation . 22
5.1 Introduction . 22
5.2 Synchronization . 22
5.3 Cross-Border Coordination . 23
5.4 Cross-Link Interference . 23
5.5 Remote Interference Management (RIM) . 24
6 Inter-System Interference . 25
ETSI
4 ETSI TR 103 865 V1.1.1 (2024-09)
7 Doppler Effect . 25
7.1 DMRS configuration trade-offs . 25
7.2 Potential network lay-out constraints related to maximum change rate of doppler shift . 26
8 Impact of Sub-Carrier Spacing . 26
8.1 Analysis . 26
8.2 Additional Results . 27
9 Impact of Speed on Time Synchronization . 28
10 Observations and Conclusions . 29
Annex A: Interference mitigation using MMSE-IRC . 31
Annex B: Effect of Subcarrier spacing on cell edge performance in 1 900 MHz railway
scenario . 34
Annex C: Link level simulation on subcarrier spacing effects . 35
C.1 Introduction . 35
C.2 Performance summary . 35
C.3 Results . 37
Annex D: Change History . 40
History . 41

ETSI
5 ETSI TR 103 865 V1.1.1 (2024-09)
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