In this post, I will introduce the BBU5900A in detail to facilitate your understanding of the product.
BBU5900A exterior
Figure 1 BBU5900A exterior
BBU5900A Working Principle
A BBU consists of the following subsystems: baseband subsystem, power and mechanical subsystem, transmission subsystem, interconnection subsystem, main control subsystem, monitoring subsystem, and clock subsystem. Each subsystem consists of different modules, as listed in the following table.
Table 1 Components of the BBU
Subsystem
Module
Power and mechanical subsystem
Backplane, fan unit (FAN), and power and environment interface unit (PEU)
Main control subsystem
MPT
Baseband subsystem
Baseband processing unit (BBP)
Transmission subsystem
MPT
Interconnection subsystem
MPT
Clock subsystem
MPT
Monitoring subsystem
Environment interface unit (EIU)
The following figure shows the working principle of a BBU.
Figure 2 Working principle of a BBU
BBU5900A Function
A BBU performs the following functions:
Provides ports for connecting to the transmission equipment, RF modules, USB devices, external reference clock, and LMT or MAE to transmit signals, perform automatic base station software upgrade, receive reference clock signals, and support BBU maintenance on the LMT or MAE.
Manages the entire base station system. The management involves uplink and downlink data processing, signaling processing, resource management, and operation and maintenance.
BBU5900A Matching Boards
The BBU5900A is classified into AC and DC, and the corresponding boards are different.
The BBU5900A (AC) and BBU5900A (DC) support different boards. Table 2-1 describes boards supported by the BBU5900A (AC) and Table 2-2 describes boards supported by the BBU5900A (DC) regardless of the mode and configuration.
ETSI EN 300019-1-4 V2.2.1 (2014-04) Class 4.1: "Non-weatherprotected locations"
Storage environment
ETSI EN300019-1-1 V2.2.1 (2014-04) Class1.2 "Weather protected, not temperature-controlled storage locations"
NOTE:
The validity period is one year.
The product can function properly within the validity period if the storage environment meets the preceding standards.
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
YD/T 2324-2011: Lightning protection requirements and test methods for radio base stations
GB 50689-2011 Code for design of lightning protection and earthing engineering for telecommunication bureaus (stations)
The site capacity and signaling specifications are calculated based on the UBBP model. Therefore, capacity specifications are not described in this section.
Compared with the BBU5900, the BBU5900A is suitable for outdoor installation, especially in high-altitude areas.
In this post, I will introduce the BBU5900A in detail to facilitate your understanding of the product.
BBU5900A exterior
Figure 1 BBU5900A exterior
BBU5900A Working Principle
A BBU consists of the following subsystems: baseband subsystem, power and mechanical subsystem, transmission subsystem, interconnection subsystem, main control subsystem, monitoring subsystem, and clock subsystem. Each subsystem consists of different modules, as listed in the following table.
Table 1 Components of the BBU
Subsystem
Module
Power and mechanical subsystem
Backplane, fan unit (FAN), and power and environment interface unit (PEU)
Main control subsystem
MPT
Baseband subsystem
Baseband processing unit (BBP)
Transmission subsystem
MPT
Interconnection subsystem
MPT
Clock subsystem
MPT
Monitoring subsystem
Environment interface unit (EIU)
The following figure shows the working principle of a BBU.
Figure 2 Working principle of a BBU
BBU5900A Function
A BBU performs the following functions:
Provides ports for connecting to the transmission equipment, RF modules, USB devices, external reference clock, and LMT or MAE to transmit signals, perform automatic base station software upgrade, receive reference clock signals, and support BBU maintenance on the LMT or MAE.
Manages the entire base station system. The management involves uplink and downlink data processing, signaling processing, resource management, and operation and maintenance.
BBU5900A Matching Boards
The BBU5900A is classified into AC and DC, and the corresponding boards are different.
The BBU5900A (AC) and BBU5900A (DC) support different boards. Table 2-1 describes boards supported by the BBU5900A (AC) and Table 2-2 describes boards supported by the BBU5900A (DC) regardless of the mode and configuration.
ETSI EN 300019-1-4 V2.2.1 (2014-04) Class 4.1: "Non-weatherprotected locations"
Storage environment
ETSI EN300019-1-1 V2.2.1 (2014-04) Class1.2 "Weather protected, not temperature-controlled storage locations"
NOTE:
The validity period is one year.
The product can function properly within the validity period if the storage environment meets the preceding standards.
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
YD/T 2324-2011: Lightning protection requirements and test methods for radio base stations
GB 50689-2011 Code for design of lightning protection and earthing engineering for telecommunication bureaus (stations)
The site capacity and signaling specifications are calculated based on the UBBP model. Therefore, capacity specifications are not described in this section.
Compared with the BBU5900, the BBU5900A is suitable for outdoor installation, especially in high-altitude areas.
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