ETSI GS ORI 002-1 V4.1.1 (2014-10)

Open Radio equipment Interface (ORI); ORI interface Specification; Part 1: Low Layers (Release 4)

RGS/ORI-0017

General Information

• Status: Published
• Publication Date: 13-Oct-2014
• Technical Committee: ORI - Open Radio equipment Interface
• Current Stage: 12 - Completion
• Due Date: 22-Sep-2014
• Completion Date: 14-Oct-2014

Standards Content (Sample)

ETSI GS ORI 002-1 V4.1.1 (2014-10)






GROUP SPECIFICATION
Open Radio equipment Interface (ORI);
ORI interface Specification;
Part 1: Low Layers
(Release 4)
Disclaimer
This document has been produced and approved by the Open Radio equipment Interface (ORI) ETSI Industry Specification
Group (ISG) and represents the views of those members who participated in this ISG.
It does not necessarily represent the views of the entire ETSI membership.

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2 ETSI GS ORI 002-1 V4.1.1 (2014-10)



Reference
RGS/ORI-0017
Keywords
E-UTRA, interface, radio, UTRA
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3 ETSI GS ORI 002-1 V4.1.1 (2014-10)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions, symbols and abbreviations . 7
3.1 Definitions . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 ORI Low Layers specification compliance . . 9
5 Layer 1 configuration . 9
5.1 General . 9
5.2 Optical interface . 9
5.3 Electrical interface . 10
6 Control plane . 10
6.1 Mapping to CPRI protocol structure . 10
6.2 C&M resource allocation . 11
6.3 ORI reserved area . 11
6.3.1 PORT_ID . 11
6.3.2 UTRA RTWP measurement report . 12
6.3.3 BFN cycle index . 14
6.4 Additional requirements for CPRI-defined control words . 14
6.4.1 ORI low layer reset . 14
6.4.2 LOF . 14
6.4.3 LOS . 14
6.4.4 SDI . 14
6.4.5 RAI . 14
6.5 Data link layer for Fast C&M channel . 15
7 User plane . 15
7.1 Mapping and format of IQ data . 15
7.1.1 E-UTRA . 15
7.1.1A Compressed E-UTRA . 16
7.1.2 UTRA-FDD . 16
7.1.3 GSM. 17
7.1.3.1 General . 17
7.1.3.2 Usage of AxC container block stuffing bits . 17
7.1.3.2.1 Frequency hopping information (downlink stuffing bits 0… 9) . 18
7.1.4 E-UTRA, UTRA-FDD and GSM in combination . 18
7.2 IQ data compression/decompression . 18
7.2.1 General . 18
7.2.2 Compression process . 19
7.2.2.1 Down-sampling . 19
7.2.2.2 Non-linear quantization . 19
7.2.3 Decompression process . 19
7.2.3.1 Inversed non-linear quantization process . 19
7.2.3.2 Up-sampling . 19
7.2.4 Non-linear quantization process . 19
7A Synchronization and timing . 21
7A.1 GSM frame timing aspects . 21
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8 ORI start-up sequence . 22
8.1 General . 22
8.2 Optical interface . 22
8.3 CPRI Transition 6 in ORI . 22
8.4 Layer 1 start-up timer value . 23
8.5 CPRI State B duration in ORI . 23
Annex A (informative): Example for topology detection based on PORT_ID. 24
History . 25

ETSI

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5 ETSI GS ORI 002-1 V4.1.1 (2014-10)
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 Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Open Radio equipment
Interface (ORI).
The present document is part 1 of a multi-part deliverable covering the ORI Interface Specification, as identified below:
Part 1: "Low Layers (Release 4)";
Part 2: "Control and Management (Release 4)".
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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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1 Scope
The present document defines low layer protocols aspects of the Open Radio equipment Interface (ORI). Low layer
protocols are those terminating the ORI Link (a bi-directional interface in-between two directly-connected ORI ports,
on two ORI nodes).
The Layer 1/2 protocols of CPRI Specification [1] have been used as a baseline for which further requirements for
protocols up to and including the Layer 2 have been defined.
See the associated specification "Requirements for Open Radio equipment Interface" [2] for more information on how
the Low Layer protocols relate to other aspects of the ORI interface.
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] "Common Public Radio Interface (CPRI); Interface Specification V6.0".
NOTE: Available at http://www.cpri.info/spec.html.
[2] ETSI GS ORI 001: "Open Radio equipment Interface (ORI); Requirements for Open Radio
equipment Interface (ORI) (Release 4)".
[3] SFF INF-8074i: "SFP (Small Formfactor Pluggable) Transceiver", Revision 1.0, May 12, 2001.
NOTE: Available at http://www.sffcommittee.com.
[4] SFF SFF-8431: "Enhanced Small Form Factor Pluggable Module SFP+", Revision 4.1, 6th of July
2009.
NOTE: Available at http://www.sffcommittee.com.
[5] ETSI TS 125 104: "Universal Mobile Telecommunications System (UMTS); Base Station (BS)
radio transmission and reception (FDD) (3GPP TS 25.104)".
[6] ETSI TS 125 215: "Universal Mobile Telecommunications System (UMTS); Physical layer;
Measurements (FDD) (3GPP TS 25.215)".
[7] ETSI TS 125 133: "Universal Mobile Telecommunications System (UMTS); Requirements for
support of radio resource management (FDD) (3GPP TS 25.133)".
[8] ETSI TS 136 104: "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station
(BS) radio transmission and reception (3GPP TS 36.104)".
[9] ETSI GS ORI 002-2: "Open Radio equipment Interface (ORI); ORI interface specification,
Part 2: Control and Management (Release 4)".
[10] ETSI TS 145 001: "Digital cellular telecommunications system (Phase 2+); Physical layer on the
radio path; General description (3GPP TS 45.001)".
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[11] ETSI TS 145 004: "Digital cellular telecommunications system (Phase 2+); Modulation
(3GPP TS 45.004)".
[12] ETSI TS 145 005: "Digital cellular telecommunications system (Phase 2+); Radio transmission
and reception (3GPP TS 45.005)".
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.
Not applicable.
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in GS ORI 001 [2] and the following apply:
NOTE: For any terms used in the present document that are not defined either here or directly in the clause in
which they are used, refer to CPRI specification [1].
active link: See clause 3.1 in GS ORI 001 [2].
Antenna-Carrier (AxC): See section 2.1 in [1].
AxC container: See section 2.1 in [1].
AxC container block: See section 2.1 in [1].
AxC group: See section 2.1 in [1].
GSM time slot: time slot of GSM radio access technology, as defined in TS 145 001 [10]
Master port: See section 2.1 in [1].
ORI port: See clause 3.1 in GS ORI 001 [2].
ORI-specific negotiation: subset of negotiations between master port and slave port that are defined in section 4.5.3.5
of [1] to be "vendor-specific", but for which behaviour is explicitly defined within the ORI specification
ORI vendor-specific negotiation: subset of negotiations between master port and slave port that are defined in
section 4.5.3.5 of [1] to be "vendor-specific", and not defined within the ORI specification to be "ORI-specific
negotiations"
passive link: See clause 3.1 of GS ORI 001 [2].
RE antenna port: for Rx and Tx antenna ports, this corresponds to the Tx and Rx BS antenna connector as defined as
Test Port A in [5] for UTRA-FDD, and [8] for E-UTRA
slave port: See section 2.1 in [1].
stuffing bits: See section 2.1 in [1].
stuffing samples: See section 2.1 in [1].
subchannel: See section 4.2.7.4 in [1].
Uplink Automatic Gain Control (UL AGC): function that controls the gain of the RE UL signal path of an UTRA UL
AxC with the target to keep the RMS level of the UL IQ signal at the ORI port at a target value (see clause 7.1.2)
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3.2 Symbols
For the purposes of the present document, the following symbols apply:
AxC Antenna-carrier
N Number of Antenna-Carrier (AxC) in one AxC Group
A
NOTE: See section 4.2.7.2.7 in [1].
N Number of AxC Containers of one AxC Container Group per basic frame
C
NOTE: See section 4.2.7.2.7 in [1].
N Number of stuffing samples per AxC Container Block
V
NOTE: See section 4.2.7.2.7 in [1].
V Target RMS level
RMS
⎡x ⎤ Ceiling function: the largest integer y where y < x + 1,0
μ Parameter used within the IQ data compression/decompression process
σ Parameter used within the IQ data compression/decompression process
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3GPP 3 Generation Partner Project
AGC Automatic Gain Control
ARFCN Absolute Radio Frequency Channel Number
BCI BFN Cycle Index
BFN Node B Frame Number
BS Base Station
C&M Control and Management
CPRI Common Public Radio Interface
dec Decimal
DL DownLink
E-UTRA Evolved UMTS Terrestrial Radio Access
FDD Frequency Division Duplex
GSM Global System for Mobile communications (Group Special Mobile)
HFN Hyper-Frame Number
IQ In-phase data and Quadrature data
L1 Layer 1
L2 Layer 2
LOF Loss Of Frame
NOTE: As defined in [1].
LOS Loss Of Signal
NOTE: As defined in [1].
LSB Least Significant Bit
MAC Media Access Control
MSB Most Significant Bit
ORI Open Radio equipment Interface
RAI Remote Alarm Indication
NOTE: As defined in [1].
RE Radio Equipment
REC Radio Equipment Control
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RMS Root Mean Square
RTWP Received Total Wideband Power
Rx Receiver
SAP Service Access Point
SDI SAP Defect Indication
NOTE: As defined in [1].
SFP Small Form-factor Pluggable
Tx Transmitter
UL UpLink
UTRA UMTS Terrestrial Radio Access
4 ORI Low Layers specification compliance
The RE/REC compliant to the ORI Low Layers specification shall:
- be fully compliant to CPRI Specification, as defined in section 5.2 of [1];
- support mandatory requirements defined within ORI that are defined as options within CPRI Specifications;
- support mandatory requirements defined within ORI that do not refer to functionality in CPRI Specifications.
5 Layer 1 configuration
5.1 General
Requirements for the L1 characteristics are defined below. For each of the defined characteristics, the level of support
shall be declared for each port of the RE/REC.
Line bit rate
At least one of the CPRI line bit rate options specified in [1], section 4.2.1 shall be supported by the RE and REC, with
the exception of 614,4 Mbit/s line bit rate.
Physical Interface
At least one of the following interfaces shall be supported:
- Optical interface parameters defined in clause 5.2.
- Electrical interface parameters defined in clause 5.3.
5.2 Optical interface
Connector type
At least one of the following connector types shall be supported by the RE and REC: LC-type, SC-type.
Simplex/Duplex operation mode
At least one of the following operation modes shall be supported by the RE and REC: Simplex (one fibre per direction),
Duplex (one fibre for both transmission and reception).
Optical Fibre Type
The ORI recommendation for optical cabling follows section 4.2.4.1 of [1].
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Wave length
The wave lengths to be supported by RE and REC are not specified.
Optical output power
Optical output power to be supported by RE and REC is not specified.
Sensitivity
The optical sensitivity to be supported by RE and REC is not specified.
Signal condition capabilities
The maximum fibre length and attenuation to be supported by RE and REC are not specified.
5.3 Electrical interface
Electrical Connector type
At least one of the following connector types shall be supported by the RE and REC:
- SFP [3], SFP+ [4], those defined in section 4.2.3.2 of the CPRI Specification [1].
Electrical Cable Type
The Electrical Cable Type for the ORI link follows section 4.2.3.1 in the CPRI Specification [1].
Electrical Interface Characteristics
No specific Electrical Interface Characteristics are specified by ORI. It is recommended to follow section 6.2 of the
CPRI Specification [1].
6 Control plane
6.1 Mapping to CPRI protocol structure
ORI compliant nodes shall apply the usage of subchannels defined in CPRI control words (see [1]), as described in
Table 6.1.1.
Table 6.1.1: Subchannel allocation within ORI
Subchannel
Area Usage
Ns
0 to 15 CPRI reserved control words Refer to CPRI [1] for usage.
16 to 40 Vendor specific area This area is open for vendor specific use; general ORI rules for vendor
specific extensions apply (see GS ORI 001 [2]).
41 to 52 ORI reserved area This area shall be reserved for specification by ORI.
See clause 6.3 for further definition.
53 to 63 Fast C&M channel This area carries the ORI C&M messaging (for active links only).
(min. 10,56 Mbit/s @ 1 228,8 Mbit/s link speed).

NOTE: As the minimum CPRI link rate supported by ORI is 1 228,8 Mbit/s, control words have a minimum
width of 16 bits.
The listed allocation leads to the map of CPRI control words, which shall be mapped for active links as described in
Figure 6.1.1.
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Xs = 0 1 2 3
Ns = 0
1    CPRI L1 control words
2
3
  CPRI reserved area
…

15
16
  Vendor-specific area
…

40
41
  ORI reserved area
…

52
P = 53
  ORI C&M
…

63

Figure 6.1.1: Control word mapping to subchannel allocation
6.2 C&M resource allocation
The Fast C&M channel, as described in [1] shall be supported by REC and RE for both Downlink and Uplink C&M
communication.
The C&M pointer p is defined at byte Z.194.0 in [1].
The master port shall set byte Z.194.0 with p = 53 [dec] for active links, and p = 0 for passive links.
6.3 ORI reserved area
The Control Words in the "ORI reserved area" shall be reserved for specification within ETSI ORI, and shall not be
used for other purposes.
The control words within the ORI reserved area shall be allocated as described in Table 6.3.1.
Control words not defined in Table 6.3.1 are reserved for future definition, shall be set to 0 in the present Release of this
multi-part deliverable, and shall not be interpreted by the receiving ORI node.
Table 6.3.1: Control word definition within ORI reserved field
Subchannel Allocation Data content Comment
index Ns
52 PORT_ID See clause 6.3.1
50 and 51 RTWP measurement report See clause 6.3.2
49 BFN cycle index See clause 6.3.3 Only Y = 0 shall be reserved
for this control word.

6.3.1 PORT_ID
The PORT_ID uniquely identifies an ORI port of an ORI node (RE or REC). It is defined as follows:
=
MAC address: Ethernet MAC address of the node (size: 6 bytes).
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ORI port number: one byte indicating the port number (from 1 to 255) per node. The port number 0 shall not be
used but is reserved for possible future purposes (e.g. testing); therefore up to 255 ports per
node can be addressed.
Reserved byte: The transmitter shall send zero for the reserved byte and the receiver shall not interpret this
byte.
The size of the PORT_ID is 8 bytes in total such that the information completely fills two bytes (Y = 0, Y = 1) of the
subchannel. For line rates higher than 1,228 Gbps, the additional bytes (Y > 1) of the subchannel shall be treated as
reserved.
The exact bitwise mapping of the PORT_ID shall be as shown in Table 6.3.1.1.
Table 6.3.1.1: Allocation of PORT_ID within subchannel
Byte Bit Z.52.Y Z.116.Y Z.180.Y Z.244.Y
number number
B = 0 LSB of reserved byte LSB of MAC byte#0 LSB of MAC byte#2 LSB of MAC byte#4
Y = 0 : : : : :
: : : : :
B = 7 MSB of reserved byte MSB of MAC byte#0 MSB of MAC byte#2 MSB of MAC byte#4
B = 8 LSB of Port number LSB of MAC byte#1 LSB of MAC byte#3 LSB of MAC byte#5
Y = 1 : : : : :
: : : : :
B = 15 MSB of Port number MSB of MAC byte#1 MSB of MAC byte#3 MSB of MAC byte#5

The PORT_ID shall be sent by the ORI node in each hyperframe upon achieving L1/L2 synchronization of the ORI
link.
An example for topology detection based on the PORT_ID is given in Annex A.
6.3.2 UTRA RTWP measurement report
For UTRA-FDD operation, the Received Total Wideband Power (RTWP) shall be measured and reported from the RE
on the ORI link as defined below:
1) RTWP measurement definition:
The received total wide band power, including noise generated in the receiver, within the bandwidth defined
by the receiver pulse shaping filter. The reference point for the measurement shall be the RE (Rx) antenna
port, including in the case that receiver diversity is in use by the RE. It is the responsibility of the REC to use
the corresponding RTWP reported values to derive the RTWP measurement defined by TS 125 215 [6].
2) RTWP measurement period in the RE:
The RTWP measurement period shall be 2 ms.
3) RTWP measurement accuracy minimum performance requirement:
The RTWP measurement performed by RE shall have an accuracy such that the reported value received by the
REC allows the REC to meet the RTWP minimum performance requirements defined in TS 125 133 [7]
corresponding to the Base Station class supported by the RE.
4) RTWP measurement reporting by the RE performing the RTWP measurement:
- Reporting conditions:
 The Received Total Wideband Power measurement shall be reported per AxC of type "UTRA-
FDD". Reporting is required for all AxCs of type "UTRA-FDD" that are configured and reporting
shall be performed autonomously by the RE. For each AxC, a RTWP reported value shall be
reported from the RE in the RTWP measurement report control word on the ORI link (the mapping
to the ORI link is defined in GS ORI 002-2 [9]) in every hyperframe, and shall be updated for each
AxC by the RE every 2 ms, in hyperframe number 0, 30, 60, 90, 120 (HFN#0, 30, 60, 90, 120).
NOTE: An AxC is configured by higher layers as defined in GS ORI 002-2 [9].
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Mapping of RTWP measured values to RTWP reported values:
- The RTWP measured value is adjusted according to the value of "Uplink feeder adjustment"
prior to reporting, as
...