RRU5904

Description

Issue 11
Date 2020-03-28

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved.
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 RRU5904
Description Contents

Contents

1 RRU5904 Description ................................................................................................................... 1

1.1 Exterior and Physical Ports ........................................................................................................................................... 1
1.2 Version Differences ....................................................................................................................................................... 3

2 RRU5904 (1800 MHz) Technical Specifications ...................................................................... 4

2.1 RRU5904 (1800 MHz) RF Specifications .................................................................................................................... 4
2.2 RRU5904 (1800 MHz) Engineering Specifications ..................................................................................................... 7
2.3 RRU5904 (1800 MHz) CPRI Port Specifications ...................................................................................................... 10

3 RRU5904 (2100 MHz) Technical Specifications .................................................................... 11

3.1 RRU5904 (2100 MHz) RF Specifications .................................................................................................................. 11
3.2 RRU5904 (2100 MHz) Engineering Specifications ................................................................................................... 14
3.3 RRU5904 (2100 MHz) CPRI Port Specifications ...................................................................................................... 16

4 Acronyms and Abbreviations ................................................................................................... 18

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RRU5904
Description 1 RRU5904 Description

1 RRU5904 Description

The RRU5904 is an outdoor remote radio unit that is powered by a power cabinet. It is the RF
part of a distributed base station and can be installed near an antenna. The RRU5904 performs
modulation, demodulation, data processing, and combination and division of baseband signals
and RF signals.
With the software-defined radio (SDR) technology, the RRU5904 can work in multiple modes
through software configuration.

1.1 Exterior and Physical Ports

Figure 1-1 shows the exterior of an RRU5904.

Figure 1-1 Exterior of an RRU5904

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Description 1 RRU5904 Description

The RRU uses a modular design. Its external ports are located at the bottom of the module
and in the cabling cavity.
Figure 1-2 shows the physical ports on the RRU5904 and Table 1-1 describes these ports.

Figure 1-2 Physical ports on the RRU5904

Table 1-1 Physical ports on the RRU5904

Port Type Connector Type Quanti Description

ty

RF port 4.3-10 connector 4 Connects to the antenna system.

CPRI port DLC connector 2 Connects to a BBU.
Power port Female fast 1 Supports –48 V DC power input.
connector (pressfit
type)
RET port DB9 connector 1 Connects to a remote control unit
(RCU).

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Description 1 RRU5904 Description

1.2 Version Differences

This section describes the version mapping information and application differences of the
RRU5904 in different versions.

RRU5904 (1800 MHz)

The mapping version information about the RRU5904 (1800 MHz) is as follows:
 Earliest mapping software version of the base station: SRAN13.1
 PnP software versions supported by the base station: SRAN11.1 and SRAN12.1
The following describes the specification differences when the RRU5904 (1800 MHz) is used
in different versions:
 From SRAN12.1 onwards, the RRU5904 (1800 MHz) can work in NB-IoT mode.
 From SRAN15.0 onwards, the RRU5904 (1800 MHz) can be configured with NR FDD
carriers only in the uplink by using the UL and DL decoupling feature, which means that
the RRU5904 supports NR SUL.
 From SRAN15.1 onwards, the RRU5904 (1800 MHz) supports the NB-IoT multi-carrier
function.
 From SRAN16.0 onwards, the RRU5904 (1800 MHz) can work in NR FDD mode.

RRU5904 (2100 MHz)

The mapping version information about the RRU5904 (2100 MHz) is as follows:
 Earliest mapping software version of the base station: SRAN13.1
 PnP software versions supported by the base station: SRAN11.1 and SRAN12.1
The following describes the specification differences when the RRU5904 (2100 MHz) is used
in different versions:
 From SRAN15.1 onwards, the RRU5904 (2100 MHz) can be configured with NR FDD
carriers only in the uplink by using the UL and DL decoupling feature, which means that
the RRU5904 supports NR SUL.
 From SRAN16.0 onwards, the RRU5904 (2100 MHz) can work in NR FDD mode.

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Description 2 RRU5904 (1800 MHz) Technical Specifications

2 RRU5904 (1800 MHz) Technical

Specifications

The technical specifications of an RRU5904 (1800 MHz) include RF specifications,

engineering specifications, and CPRI port specifications.

2.1 RRU5904 (1800 MHz) RF Specifications

The RF specifications include the supported radio access technologies (RATs), frequency
bands, TX/RX modes, capacity, output power, carrier configurations, and receiver sensitivity.
 In the following, G is short for GSM, L is short for LTE FDD, M is short for LTE
NB-IoT, and N (FDD) is short for NR FDD.
 In the following, NR SUL indicates that NR FDD is supported only in the uplink. It is
abbreviated as N (SUL).

Supported Frequency Bands and RATs

Table 2-1 Frequency bands and RATs supported by an RRU5904 (1800 MHz)

Frequency Protocol- RX TX RAT IBW

Band defined Frequency Frequency (MHz)
(MHz) Band Band (MHz) Band (MHz)

1800 Band 3/n3 1710 to 1785 1805 to 1880 GSM, LTE FDD, 45
GL, LTE
NB-IoT, GM,
LM, GLM, LN
(SUL), GLN
(SUL), NR FDD,
GN (FDD), LN
(FDD), GLN
(FDD), MN
(FDD), LMN
(FDD)

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TX/RX Modes and Capacity

Table 2-2 TX/RX modes and capacity of an RRU5904 (1800 MHz)

Frequency Protocol- TX/RX Capacity Supported

Band defined Modea Bandwidth
(MHz) Band (MHz)
1800 Band 3/n3 4T4R GSM: 8 carriers LTE FDD:
LTE FDD: 3 carriers 5/10/15/20
LTE NB-IoT: 8 carriers NR SUL: 15/20
when the NB-IoT NR FDD:
multi-carrier function is 5/10/15/20
enabled and 1 carrier when
the NB-IoT multi-carrier
function is disabled
NR SUL: 1 carrier
NR FDD: 3 carriers
a: ATBR in the TX/RX Mode column indicates that the RF module uses A transmit
channels and B receive channels.

 The NB-IoT multi-carrier function is an NB-IoT multi-carrier transmission technology introduced

based on 3GPP Release 13. An NB-IoT cell can have multiple carriers and assigns UEs to multiple
carriers to increase cell capacity. For details about this function and related parameter settings, see
NB-IoT Enhancements (FDD) in the eRAN FDD Feature Documentation.
 The bandwidth information in Supported Bandwidth is the standard bandwidth that can be
configured for a single-mode carrier when only one carrier is configured. In any carrier combination
scenario, the total bandwidth of all carriers cannot exceed the IBW value. For details about the
bandwidth that can be configured for each carrier in each carrier combination scenario, see Output
Power Configuration in the following table.

Output Power and Carrier Configurations

Table 2-3 Output power and carrier configurations of an RRU5904 (1800 MHz)

Frequency Maximum Output Powera Output Power Configuration

Band (MHz)

1800 4x60 W Typical Power Configuration

Reference for RRU (Excluding
NB-IoT)
NB-IoT Typical Power Configurations
(RRU)
a: AxC W in the Maximum Output Power column indicates that the number of TX
channels of the RF module is A and the maximum output power of each TX channel is C
W.

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 Each value of Output Power per Carrier (W) in the Typical Power Configurations document
indicates the maximum output power of each carrier under the corresponding configuration while
ensuring the network performance. The actually configured carrier power of RF modules can be less
than or equal to the value of Output Power per Carrier (W) in the document. The power
configuration that is not supported in the document may be configurable on the software. Huawei
can only promise the performance with the power configurations listed in the document.

NR SUL Carrier Configurations

This section describes the numbers of LTE FDD carriers and NR FDD carriers that can be
configured on the LTE uplink spectrum after the LTE and NR uplink spectrum sharing feature
is enabled.

Table 2-4 SUL carrier configurations of an RRU5904 (LN, 1800 MHz, 4R)

Maximum Number of Maximum Number of Bandwidth per NR SUL

LTE FDD Carriers NR SUL Carriers Carrier (MHz)

3 (MIMO) 1 15/20

Table 2-5 SUL carrier configuration of an RRU5904 (GLN, 1800 MHz, 4R)

Maximum Maximum Maximum Bandwidth per

Number of GSM Number of LTE Number of NR NR SUL Carrier
Carriers FDD Carriers SUL Carriers (MHz)

8 2 (MIMO) 1 15/20

The uplink bandwidth of an LTE carrier enabled with uplink spectrum sharing must be the same as the
uplink bandwidth of an NR carrier. For detailed bandwidth, see the value in the Bandwidth per NR
SUL Carrier (MHz) column in the preceding table. The uplink bandwidth of an LTE carrier that is not
enabled with uplink spectrum sharing is not limited by the NR SUL bandwidth.

Receiver Sensitivity

Table 2-6 Receiver sensitivity of an RRU5904 (1800 MHz)

Frequency Protocol- Receiver Receiver Receiver

Band defined Sensitivity Sensitivity Sensitivity with
(MHz) Band with One with Two Four Antennas
Antenna (dBm) Antennas (dBm)
(dBm)

1800 Band 3/n3 GSM: -114.0 GSM: -116.8 GSM: -119.5

LTE FDD: -106.6 LTE FDD: -109.4 (theoretical value)
LTE NB-IoT: LTE NB-IoT: LTE FDD: -112.1
-127.3 -130.1 LTE NB-IoT: -132.8

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Frequency Protocol- Receiver Receiver Receiver

Band defined Sensitivity Sensitivity Sensitivity with
(MHz) Band with One with Two Four Antennas
Antenna (dBm) Antennas (dBm)
(dBm)
NR FDD: -106.3 NR FDD: -109.1 NR FDD: -111.8

 The GSM receiver sensitivity, as recommended in 3GPP TS 51.021, is measured at the antenna
connector assuming that the channel rate is 13 kbit/s and the bit error rate (BER) is lower than or
equal to 2%.
 The LTE FDD receiver sensitivity, as recommended in 3GPP TS 36.141, is measured under a 5 MHz
bandwidth based on the FRC A1-3 in Annex A.1 (QPSK, R = 1/3, 25 RBs) standard.
 The LTE NB-IoT receiver sensitivity, as recommended in 3GPP TS 36.141, is measured under a 200
kHz bandwidth and a 15 kHz subcarrier spacing based on the FRC A14-1 in Annex A.14 (π/2 BPSK,
R = 1/3, 1 RB) standard.
 The NR FDD receiver sensitivity, as recommended in 3GPP TS 38.141, is measured under a 5 MHz
bandwidth based on the Annex A.1 (QPSK, R = 1/3) standard.

RF Compliance Standards

Table 2-7 RF compliance standards for an RRU5904 (1800 MHz)

Item Standard

GSM standard 3GPP TS 45.005

LTE standard 3GPP TS 36.104
NR standard 3GPP TS 38.104
Multimode standard 3GPP TS 37.104

2.2 RRU5904 (1800 MHz) Engineering Specifications

The engineering specifications include the input power, dimensions, weight, power
consumption, and environmental specifications.

Input Power

Table 2-8 Input power of an RRU5904 (1800 MHz)

Power Input Type Operating Voltage

-48 V DC -36 V DC to -57 V DC

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Description 2 RRU5904 (1800 MHz) Technical Specifications

DC RRUs can use external power modules to support AC scenarios. For details about the types of
external power modules supported by each type of RRU, see section "RRU Auxiliary Devices" in the
corresponding RRU hardware description. For details about the external power modules, see user guides
of the corresponding models.

Dimensions and Weight

Table 2-9 Dimensions and weight of an RRU5904 (1800 MHz)

Item Specifications
Dimensions (H x W x D) 400 mm x 300 mm x 150 mm (15.75 in. x 11.81 in. x 5.91
in.) (18 L)
Weight 22 kg (48.51 lb, excluding mounting kits)

Module Power Consumption

Table 2-10 Power consumption of an RRU5904 (1800 MHz)

Frequency Band (MHz) Typical Power Consumption (W)a

1800 492
a: The typical power consumption of an RF module is measured when the ambient
temperature is 25°C (77°F) and the traffic load reaches 50%. The actual power
consumption has a 10% deviation from this value.

Environmental Specifications

Table 2-11 Environmental specifications of an RRU5904 (1800 MHz)

Item Specifications
Operating temperature  Without solar radiation: –40°C to +55°C (-40°F to
+131°F)
 With solar radiation of 1120 W/m2: -40°C to +50°C
(-40°F to +122°F)
Relative humidity 5% RH to 100% RH
Absolute humidity 1 g/m3 to 30 g/m3
Atmospheric pressure 70 kPa to 106 kPa

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The output power of an RRU temporarily decreases when it operates at temperature ranges 10ºC (50ºF)
less than or equal to its maximum rated value. This is dependent on installation scenario, traffic load,
and carrier configuration.

Table 2-12 Surge protection specifications of ports on an RRU5904 (1800 MHz)

Port Surge Protection Mode Specifications

DC power port Surge current 20 kA

 Unless otherwise specified, the lightning protection specifications depend on the surge waveform of
8/20 μs.
 Unless otherwise specified as maximum discharge current, all the surge current items refer to
nominal discharge current.

Table 2-13 Environment compliance standards for an RRU5904 (1800 MHz)

Item Specifications
Operating environment ETSI EN 300 019-1-4 V2.1.2 (2003-04) Class 4.1:
"Non-weather protected locations"
Storage environmenta ETSI EN 300 019-1-1 V2.1.4 (2003-04) Class 1.2:
"Weather protected, not temperature-controlled storage
locations"
Shockproof protection NEBS GR63 zone4
Ingress protection rating IP65
Surge protection  IEC 62305-1 Protection against lightning - Part 1:
General principles
 IEC 62305-3 Protection against lightning - Part 3:
Physical damage to structures and life hazard
 IEC 62305-4 Protection against lightning - Part 4:
Electrical and electronic systems within structures
 ITU-T K.35 Bonding configurations and earthing at
remote electronic sites
 ITU-T K.56 Protection of radio base stations against
lightning discharges
 ITU-T K.97 Lightning protection of distributed base
stations
 ETSI EN 300 253 Environmental Engineering (EE):
Earthing and bonding configuration inside
telecommunications centers
a: The validity period is one year. The product can function properly within the validity
period if the storage environment meets the preceding standards.

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Description 2 RRU5904 (1800 MHz) Technical Specifications

2.3 RRU5904 (1800 MHz) CPRI Port Specifications

The CPRI port specifications include the number of CPRI ports, port protocol, port rate, and
maximum levels of cascading and maximum distance with a BBU.

Table 2-14 CPRI port protocol and rate of an RRU5904 (1800 MHz)

Number of CPRI Ports Protocol Type Port Rate (Gbit/s)

2 CPRI 1.25/2.5/4.9/9.8

The following table lists the maximum level of cascading and maximum distance between an
RRU and a BBU when the RRU works in a single mode. When the RRU works in multimode
concurrency scenarios, the maximum level of cascading and maximum distance between the
multimode RRU and a BBU are determined by the capabilities for the mode with the lowest
capabilities.

Table 2-15 Maximum levels of cascading and maximum distance between an RRU5904 (1800
MHz) and a BBU

Mode Maximum Level of Maximum Distance from a BBU (km)

Cascading with a BBU

GSM 6 40
LTE FDD 4  When the LBBPc or LBBPd1 is
configured: 20
 When the LBBPd2 or UBBP is
configured: 40
 When the LBBPd3 is configured: 40
(number of cells ≤ 3); 20 (number of
cells ≥ 4)
LTE NB-IoT 4 20
NR SUL 4 20
NR FDD 4 20

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Description 3 RRU5904 (2100 MHz) Technical Specifications

3 RRU5904 (2100 MHz) Technical

Specifications

The technical specifications of an RRU5904 (2100 MHz) include RF specifications,

engineering specifications, and CPRI port specifications.

3.1 RRU5904 (2100 MHz) RF Specifications

The RF specifications include the supported radio access technologies (RATs), frequency
bands, TX/RX modes, capacity, output power, carrier configurations, and receiver sensitivity.
 In the following, U is short for UMTS, L is short for LTE FDD, and N (FDD) is short
for NR FDD.
 In the following, NR SUL indicates that NR FDD is supported only in the uplink. It is
abbreviated as N (SUL).

Supported Frequency Bands and RATs

Table 3-1 Frequency bands and RATs supported by an RRU5904 (2100 MHz)

Frequency Protocol- RX TX RAT IBW

Band defined Frequency Frequency (MHz)
(MHz) Band Band (MHz) Band (MHz)

2100 Band 1/n1 1920 to 1980 2110 to 2170 UMTS, LTE 60

FDD, UL, LN
(SUL), ULN
(SUL), NR FDD,
UN (FDD), LN
(FDD), ULN
(FDD)

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TX/RX Modes and Capacity

Table 3-2 TX/RX modes and capacity of an RRU5904 (2100 MHz)

Frequency Protocol- TX/RX Capacity Supported

Band defined Modea Bandwidth
(MHz) Band (MHz)
2100 Band 1/n1 4T4R UMTS: 8 carriers (without LTE FDD:
MIMO) and 4 carriers 5/10/15/20
(with MIMO) NR SUL: 15/20
LTE FDD: 3 carriers NR FDD:
NR SUL: 1 carrier 5/10/15/20
NR FDD: 3 carriers
a: ATBR in the TX/RX Mode column indicates that the RF module uses A transmit
channels and B receive channels.

The bandwidth information in Supported Bandwidth is the standard bandwidth that can be configured
for a single-mode carrier when only one carrier is configured. In any carrier combination scenario, the
total bandwidth of all carriers cannot exceed the IBW value. For details about the bandwidth that can be
configured for each carrier in each carrier combination scenario, see Output Power Configuration in
the following table.

Output Power and Carrier Configurations

Table 3-3 Output power and carrier configurations of an RRU5904 (2100 MHz)

Frequency Maximum Output Powera Output Power Configuration

Band (MHz)
2100 4x60 W Typical Power Configuration Reference
for RRU (Excluding NB-IoT)
a: AxC W in the Maximum Output Power column indicates that the number of TX
channels of the RF module is A and the maximum output power of each TX channel is C
W.

 Each value of Output Power per Carrier (W) in the Typical Power Configurations document
indicates the maximum output power of each carrier under the corresponding configuration while
ensuring the network performance. The actually configured carrier power of RF modules can be less
than or equal to the value of Output Power per Carrier (W) in the document. The power
configuration that is not supported in the document may be configurable on the software. Huawei
can only promise the performance with the power configurations listed in the document.

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Description 3 RRU5904 (2100 MHz) Technical Specifications

NR SUL Carrier Configurations

This section describes the numbers of LTE FDD carriers and NR FDD carriers that can be
configured on the LTE uplink spectrum after the LTE and NR uplink spectrum sharing feature
is enabled.

Table 3-4 SUL carrier configurations of an RRU5904 (LN, 2100 MHz, 4R)
Maximum Number of Maximum Number of Bandwidth per NR SUL
LTE FDD Carriers NR SUL Carriers Carrier (MHz)

3 (MIMO) 1 15/20

Table 3-5 SUL carrier configurations of an RRU5904 (ULN, 2100 MHz, 4R)

Maximum Maximum Maximum Bandwidth per

Number of UMTS Number of LTE Number of NR NR SUL Carrier
Carriers FDD Carriers SUL Carriers (MHz)

8 2 (MIMO) 1 15/20
2 (MIMO) 2 (MIMO) 1 15/20
3 (MIMO) 1 (MIMO) 1 15/20

The uplink bandwidth of an LTE carrier enabled with uplink spectrum sharing must be the same as the
uplink bandwidth of an NR carrier. For detailed bandwidth, see the value in the Bandwidth per NR
SUL Carrier (MHz) column in the preceding table. The uplink bandwidth of an LTE carrier that is not
enabled with uplink spectrum sharing is not limited by the NR SUL bandwidth.

Receiver Sensitivity

Table 3-6 Receiver sensitivity of an RRU5904 (2100 MHz)

Frequency Protocol- Receiver Receiver Receiver

Band defined Sensitivity Sensitivity Sensitivity with
(MHz) Band with One with Two Four Antennas
Antenna (dBm) Antennas (dBm)
(dBm)

2100 Band 1/n1 UMTS: -126.1 UMTS: -128.9 UMTS: -131.6

LTE FDD: -106.9 LTE FDD: -109.7 LTE FDD: -112.4
NR FDD: -106.6 NR FDD: -109.4 NR FDD: -112.1

 The UMTS receiver sensitivity, as recommended in 3GPP TS 25.141, is measured at the antenna
connector assuming that the channel rate is 12.2 kbit/s and the bit error rate (BER) is lower than or
equal to 0.001.

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 The LTE FDD receiver sensitivity, as recommended in 3GPP TS 36.141, is measured under a 5 MHz
bandwidth based on the FRC A1-3 in Annex A.1 (QPSK, R = 1/3, 25 RBs) standard.
 The NR FDD receiver sensitivity, as recommended in 3GPP TS 38.141, is measured under a 5 MHz
bandwidth based on the Annex A.1 (QPSK, R = 1/3) standard.

RF Compliance Standards

Table 3-7 RF compliance standards for an RRU5904 (2100 MHz)

Item Standard

UMTS standard 3GPP TS 25.104

LTE standard 3GPP TS 36.104
NR standard 3GPP TS 38.104
Multimode standard 3GPP TS 37.104

3.2 RRU5904 (2100 MHz) Engineering Specifications

The engineering specifications include the input power, dimensions, weight, power
consumption, and environmental specifications.

Input Power

Table 3-8 Input power of an RRU5904 (2100 MHz)

Power Input Type Operating Voltage

-48 V DC -36 V DC to -57 V DC

DC RRUs can use external power modules to support AC scenarios. For details about the types of
external power modules supported by each type of RRU, see section "RRU Auxiliary Devices" in the
corresponding RRU hardware description. For details about the external power modules, see user guides
of the corresponding models.

Dimensions and Weight

Table 3-9 Dimensions and weight of an RRU5904 (2100 MHz)

Item Specifications
Dimensions (H x W x D) 400 mm x 300 mm x 150 mm (15.75 in. x 11.81 in. x 5.91
in.) (18 L)
Weight 22 kg (48.51 lb, excluding mounting kits)

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Description 3 RRU5904 (2100 MHz) Technical Specifications

Module Power Consumption

Table 3-10 Power consumption of an RRU5904 (2100 MHz)

Frequency Band (MHz) Typical Power Consumption (W)a

2100 492
a: The typical power consumption of an RF module is measured when the ambient
temperature is 25°C (77°F) and the traffic load reaches 50%. The actual power
consumption has a 10% deviation from this value.

Environmental Specifications

Table 3-11 Environmental specifications of an RRU5904 (2100 MHz)

Item Specifications
Operating temperature  Without solar radiation: –40°C to +55°C (-40°F to
+131°F)
 With solar radiation of 1120 W/m2: -40°C to +50°C
(-40°F to +122°F)
Relative humidity 5% RH to 100% RH
Absolute humidity 1 g/m3 to 30 g/m3
Atmospheric pressure 70 kPa to 106 kPa

The output power of an RRU temporarily decreases when it operates at temperature ranges 10ºC (50ºF)
less than or equal to its maximum rated value. This is dependent on installation scenario, traffic load,
and carrier configuration.

Table 3-12 Surge protection specifications of ports on an RRU5904 (2100 MHz)

Port Surge Protection Mode Specifications

DC power port Surge current 20 kA

 Unless otherwise specified, the lightning protection specifications depend on the surge waveform of
8/20 μs.
 Unless otherwise specified as maximum discharge current, all the surge current items refer to
nominal discharge current.

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Table 3-13 Environment compliance standards for an RRU5904 (2100 MHz)

Item Specifications
Operating environment ETSI EN 300 019-1-4 V2.1.2 (2003-04) Class 4.1:
"Non-weather protected locations"
Storage environmenta ETSI EN 300 019-1-1 V2.1.4 (2003-04) Class 1.2:
"Weather protected, not temperature-controlled storage
locations"
Shockproof protection NEBS GR63 zone4
Ingress protection rating IP65
Surge protection  IEC 62305-1 Protection against lightning - Part 1:
General principles
 IEC 62305-3 Protection against lightning - Part 3:
Physical damage to structures and life hazard
 IEC 62305-4 Protection against lightning - Part 4:
Electrical and electronic systems within structures
 ITU-T K.35 Bonding configurations and earthing at
remote electronic sites
 ITU-T K.56 Protection of radio base stations against
lightning discharges
 ITU-T K.97 Lightning protection of distributed base
stations
 ETSI EN 300 253 Environmental Engineering (EE):
Earthing and bonding configuration inside
telecommunications centers
a: The validity period is one year. The product can function properly within the validity
period if the storage environment meets the preceding standards.

3.3 RRU5904 (2100 MHz) CPRI Port Specifications

The CPRI port specifications include the number of CPRI ports, port protocol, port rate, and
maximum level of cascading and maximum distance with a BBU.

Table 3-14 CPRI port protocol and rate of an RRU5904 (2100 MHz)

Number of CPRI Ports Protocol Type Port Rate (Gbit/s)

2 CPRI 1.25/2.5/4.9/9.8

The following table lists the maximum level of cascading and maximum distance between an
RRU and a BBU when the RRU works in a single mode. When the RRU works in multimode
concurrency scenarios, the maximum level of cascading and maximum distance between the

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Description 3 RRU5904 (2100 MHz) Technical Specifications

multimode RRU and a BBU are determined by the capabilities for the mode with the lowest
capabilities.

Table 3-15 Maximum level of cascading and maximum distance between an RRU5904 (2100
MHz) and a BBU

Mode Maximum Level of Maximum Distance from a BBU (km)

Cascading with a BBU

UMTS 6 40
LTE FDD 4  When the LBBPc or LBBPd1 is
configured: 20
 When the LBBPd2 or UBBP is
configured: 40
 When the LBBPd3 is configured: 40
(number of cells ≤ 3); 20 (number of
cells ≥ 4)
NR SUL 4 20
NR FDD 4 20

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RRU5904
Description 4 Acronyms and Abbreviations

4 Acronyms and Abbreviations

Table 4-1 Acronyms and abbreviations

Acronym or Full Name
Abbreviation

3GPP 3rd Generation Partnership Project

BBU Baseband Unit
BER Bit Error Rate
CPRI Common Public Radio Interface
DTX Discontinuous Transmission
LTE Long Term Evolution
MIMO Multi-input and Multi-output
MSR Multi-Standard Radio
NR New Radio
RAN Radio Access Network
RRU Remote Radio Unit
SDR Software-Defined Radio
UMTS Universal Mobile Telecommunications System

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