ETSI TS 103 859 V7.0.2 (2022-09)

Publicly Available Specification (PAS); O-RAN Fronthaul Control, User and Synchronization Plane Specification v7.02; (ORAN-WG4.CUS.0-v07.02)

DTS/MSG-001140

General Information

• Status: Not Published
• Technical Committee: MSG - Mobile Standards Group
• Current Stage: 12 - Completion
• Due Date: 14-Sep-2022
• Completion Date: 08-Sep-2022

Standards Content (Sample)

ETSI TS 103 859 V7.0.2 (2022-09)






TECHNICAL SPECIFICATION
Publicly Available Specification (PAS);
O-RAN Fronthaul Control, User and Synchronization Plane
Specification v07.02;
(O-RAN-WG4.CUS.0-v07.02)
CAUTION

The present document has been submitted to ETSI as a PAS produced by O-RAN WG4 and
approved by the ETSI Technical Committee MSG.
ETSI had been assigned all the relevant copyrights related to the document ORAN-WG4.CUS.0-v07.01 on an "as is basis".
Consequently, to the fullest extent permitted by law, ETSI disclaims all warranties whether express, implied, statutory or
otherwise including but not limited to merchantability, non-infringement of any intellectual property rights of third parties. No
warranty is given about the accuracy and the completeness of the content of the present document.

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2 ETSI TS 103 859 V7.0.2 (2022-09)

Reference
DTS/MSG-001140
Keywords
control, fronthaul, interface, PAS, synchronization



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3 ETSI TS 103 859 V7.0.2 (2022-09)
Contents
Intellectual Property Rights . 12
Foreword . 12
Modal verbs terminology . 12
1 Scope . 13
2 References . 13
2.1 Normative references . 13
2.2 Informative references . 15
3 Definition of terms, symbols and abbreviations . 15
3.1 Terms . 15
3.2 Symbols . 16
3.3 Abbreviations . 16
3.4 Document Conventions . 17
3.4.1 Terminologies . 17
3.4.2 Fields and Bitmasks in Messages . 17
4 Architecture & Requirements . 18
4.1 Architectural aspects . 18
4.1.1 Functional Split . 19
4.1.2 Selected Split 7-2x (DL) . 20
4.1.2.1 Description . 22
4.1.2.2 Benefits and Justification . 23
4.1.3 Selected Split 7-2x (UL) . 23
4.1.3.1 Description . 24
4.1.3.2 Benefits and Justification . 24
4.2 Data Flows. 24
4.3 Latency Requirements . 25
4.3.1 Timing Parameter Relationships . 27
4.3.1.1 O-DU Transmission Window. 27
4.3.2 U-Plane/ C-Plane Timing . 28
4.3.3 Computed Latency Methods . 34
4.3.3.1 Fronthaul Timing Domain . 35
4.3.3.2 Defined Transport Method . 36
4.3.3.3 Measured Transport Method . 37
4.3.4 Latency Categories for O-DU with dynamic timing advance . 40
4.3.5 Latency Categories for O-DU with fixed timing advance . 42
4.3.6 Non-Delay Managed U-Plane Traffic . 43
4.4 Reception Window Monitoring . 44
4.5 Transmission windows . 45
4.5.1 Normal Transmission . 45
4.5.2 Uniformly Distributed Transmission . 45
4.5.2.1 Overlapping transmission windows . 45
4.5.3 Ordered Transmission . 45
4.5.4 Scheduled Transmission . 46
4.6 O-RU External Antenna Delay Handling . 47
4.6.1 Minimal O-DU Impact Method (Defined Transport Method) . 47
4.6.1.1 Minimal O-DU Impact Method - Example . 48
5 Transport & Protocol Architecture . 52
5.1 Transport Encapsulation Types . 52
5.1.1 Ethernet Encapsulation . 52
5.1.2 IP/UDP Encapsulation . 52
5.1.3 Transport Headers . 53
5.1.3.1 eCPRI Transport Header . 53
5.1.3.1.1 ecpriVersion (eCPRI protocol revision) . 54
5.1.3.1.2 ecpriReserved (eCPRI reserved). 54
5.1.3.1.3 ecpriConcatenation (eCPRI concatenation indicator) . 54
ETSI

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4 ETSI TS 103 859 V7.0.2 (2022-09)
5.1.3.1.4 ecpriMessage (eCPRI message type) . 54
5.1.3.1.5 ecpriPayload (eCPRI payload size) . 54
5.1.3.1.6 ecpriRtcid / ecpriPcid (real time control data / IQ data transfer message series identifier) . 55
5.1.3.1.7 ecpriSeqid (message identifier) . 56
5.1.3.2 1914.3 Transport Header . 59
5.1.3.2.1 RoEsubType (sub type / message type) . 59
5.1.3.2.2 RoEflowID (flow identifier) . 60
5.1.3.2.3 RoElength (length) . 60
5.1.3.2.4 RoEorderInfo (order information) . 60
5.2 Protocol Architecture . 61
5.2.1 C-plane . 61
5.2.2 U-plane . 61
5.2.3 S-plane . 61
5.3 Quality of Service . 62
5.4 Data Flow Identification . 62
5.5 Fragmentation . 63
5.5.1 Application layer fragmentation . 63
5.5.2 Radio Transport layer (eCPRI or IEEE-1914.3) fragmentation . 64
5.5.3 Fragmentation Guideline . 64
6 Security. 65
6.1 General . 65
7 C-plane Protocol . 66
7.1 General . 66
7.2 Function . 66
7.2.1 C-Plane Transport . 66
7.3 Elementary Procedures . 66
7.3.1 Scheduling and Beamforming Commands Transfer procedure . 66
7.3.2 Mixed Numerology and PRACH Handling . 67
7.3.3 DL Precoding configuration parameters and indications . 72
7.3.4 LAA Commands Transfer procedure . 74
7.3.4.1 LBT procedure overview . 74
7.3.4.2 Definitions . 75
7.3.4.3 General Guidelines for the LAA-procedure . 76
7.3.4.3.1 PDSCH Transmission . 76
7.3.4.3.2 DRS Transmission . 76
7.3.4.3.3 Congestion Window Information Transmission . 77
7.3.5 Symbol Numbering and Duration . 77
7.3.6 Dynamic Spectrum Sharing (DSS) . 77
7.3.6.1 Dynamic Spectrum Sharing (DSS) via Dedicated Endpoints . 77
7.3.6.2 Dynamic Spectrum Sharing (DSS) via Section Extension =9 for DSS . 77
7.3.7 Channel Information based Beamforming . 78
7.4 Elements for the C-plane Protocol. 78
7.4.1 General . 78
7.4.1.1 Section Extensions . 79
7.4.1.2 Coupling of C-Plane and U-Plane . 79
7.4.1.2.1 Coupling via sectionId Value . 79
7.4.1.2.2 Coupling via Frequency and Time . 80
7.4.1.2.3 Coupling via Frequency and Time with Priorities . 80
7.4.1.2.4 Coupling via Frequency and Time with Priorities (Optimized) . 81
7.4.2 Scheduling and Beamforming Commands . 81
7.4.3 Coding of Information Elements – Transport Layer . 92
7.4.4 Coding of Information Elements – Application Layer, Common . 92
7.4.4.1 dataDirection (data direction (gNB Tx/Rx)) . 92
7.4.4.2 payloadVersion (payload version) . 92
7.4.4.3 filterIndex (filter index) . 93
7.4.4.4 frameId (frame identifier) . 93
7.4.4.5 subframeId (subframe identifier) . 94
7.4.4.6 slotId (slot identifier). 94
7.4.4.7 startSymbolid (start symbol identifier). 94
7.4.4.8 numberOfsections (number of sections) . 94
ETSI

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5 ETSI TS 103 859 V7.0.2 (2022-09)
7.4.4.9 sectionType (Section Type) . 94
7.4.4.10 udCompHdr (user data compression header) . 94
7.4.4.11 numberOfUEs (number Of UEs) . 95
7.4.4.12 timeOffset (time offset) . 95
7.4.4.13 frameStructure (frame structure) . 95
7.4.4.14 cpLength (cyclic prefix length) . 96
7.4.5 Coding of Information Elements – Application Layer, Sections . 97
7.4.5.1 sectionId (section identifier). 97
7.4.5.2 rb (resource block indicator) . 97
7.4.5.3 symInc (symbol number increment command) . 97
7.4.5.4 startPrbc (starting PRB of data section description) . 98
7.4.5.5 reMask (resource element mask) . 99
7.4.5.6 numPrbc (number of contiguous PRBs per data section description) . 99
7.4.5.7 numSymbol (number of symbols) . 100
7.4.5.8 ef (extension flag) . 100
7.4.5.9 beamId (beam identifier) . 100
7.4.5.10 ueId (UE identifier) . 101
7.4.5.11 freqOffset (frequency offset) . 101
7.4.5.12 regularizationFactor (regularization Factor). 101
7.4.5.13 ciIsample, ciQsample (channel information I and Q values) . 102
7.4.5.14 laaMsgType (LAA message type) . 102
7.4.5.15 laaMsgLen (LAA message length) . 102
7.4.5.16 lbtHandle . 102
7.4.5.17 lbtDeferFactor (listen-before-talk defer factor) . 103
7.4.5.18 lbtBackoffCounter (listen-before-talk backoff counter) . 103
7.4.5.19 lbtOffset (listen-before-talk offset) . 103
7.4.5.20 MCOT (maximum channel occupancy time) . 103
7.4.5.21 lbtMode (LBT Mode) . 103
7.4.5.22 lbtPdschRes (LBT PDSCH Result) . 104
7.4.5.23 sfStatus (subframe status) . 104
7.4.5.24 lbtDrsRes (LBT DRS Result) . 104
7.4.5.25 initialPartialSF (Initial partial SF) . 104
7.4.5.26 lbtBufErr (LBT Buffer Error) . 104
7.4.5.27 sfnSf (SFN/SF End) . 105
7.4.5.28 lbtCWConfig_H (HARQ Parameters for Congestion Window management) . 105
7.4.5.29 lbtCWConfig_T (TB Parameters for Congestion Window management). 105
7.4.5.30 lbtTrafficClass (Traffic class priority for Congestion Window management) . 105
7.4.5.31 lbtCWR_Rst (Notification about packet reception successful or not) . 105
7.4.5.32 reserved (reserved for future use) . 106
7.4.6 Section Extension Commands . 106
7.4.6.1 extType (extension type) . 108
7.4.6.2 ef (extension flag) . 109
7.4.6.3 extLen (extension length) . 109
7.4.7 Coding of Information Elements – Application Layer, Section Extensions . 109
7.4.7.1 ExtType=1: Beamforming Weights Extension Type . 109
7.4.7.1.1 bfwCompHdr (beamforming weight compression header) . 109
7.4.7.1.2 bfwCompParam (beamforming weight compression parameter) . 110
7.4.7.1.3 bfwI (beamforming weight in-phase value). 111
7.4.7.1.4 bfwQ (beamforming weight quadrature value) . 111
7.4.7.2 ExtType=2: Beamforming Attributes Extension Type . 111
7.4.7.2.1 bfaCompHdr (beamforming attributes compression header). 111
7.4.7.2.2 bfAzPt (beamforming azimuth pointing parameter) . 112
7.4.7.2.3 bfZePt (beamforming zenith pointing parameter) . 113
7.4.7.2.4 bfAz3dd (beamforming azimuth beamwidth parameter) . 113
7.4.7.2.5 bfZe3dd (beamforming zenith beamwidth parameter) . 113
7.4.7.2.6 bfAzSl (beamforming azimuth sidelobe parameter) . 113
7.4.7.2.7 bfZeSl (beamforming zenith sidelobe parameter) . 113
7.4.7.2.8 zero-padding . 114
7.4.7.3 ExtType=3: DL Precoding Extension Type . 114
7.4.7.3.1 codebookIndex (precoder codebook used for transmission). 115
7.4.7.3.2 layerID (Layer ID for DL transmission) . 115
7.4.7.3.3 txScheme (transmission scheme) . 115
ETSI

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