Huawei BBU3910/BBU3900 Hardware Description

In this article, HongTelecom presents the hardware components and device information of a BBU3910/BBU3900. It provides reference for planning and deploying a BBU3910/BBU3900.

  • Product Introduction
    BBU3910/BBU3900 is a baseband control unit of DBS3900.
  • Subrack
    The BBU3910/BBU3900 adopts a 2U-height subrack on which an ESN is labeled.
  • Slot Assignment
    This chapter describes the slot distribution, the principles for BBU3910/BBU3900 slot assignment and the typical configuration of BBU3910/BBU3900 boards.

Product Introduction

BBU3910/BBU3900 is a baseband control unit of DBS3900.

BBU3910/BBU3900 Function

The BBU3910/BBU3900 performs the following functions:

  • Manages the entire base station system by means of operation and maintenance (O&M), and signaling processing.
  • Provides a system clock.
  • Processes uplink and downlink data.
  • Enables information exchange with the transport network.
  • Communicates with the RF module.
  • Provides a maintenance channel connected to eLMT or eOMC910 (centralized OM system).

BBU3910/BBU3900 Appearance

BBU3910/BBU3900 adopts a 19-inch case-shaped structure with 2U height.

Figure 1 shows the BBU3910/BBU3900appearance.

Figure 1 BBU3910/BBU3900 appearance (BBU3910 as an example)
Figure 1 BBU3910/BBU3900 appearance

Subrack

The BBU3910/BBU3900 adopts a 2U-height subrack on which an ESN is labeled.

Subrack Type

The BBU3910/BBU3900supported subrack includes BBU3910 and BBU3900. A BBU3900 subrack has no silkscreen. A BBU3910 subrack has a BBU3910 silkscreen.

Functions

The subrack of the BBU3910/BBU3900 provides the following functions:

  • Combines all inserted boards as an independent unit using the backplane.
  • Prevents boards from damages due to unfavorable environment.
  • Provides channels for heat dissipation.

Subrack Architecture

BBU3910/BBU3900 subrack dimensions (H x W x D): 86 mm x 442 mm x 310 mm. The four-layered subrack can house 8 service boards, 2 power modules, and 1 fan module. Figure 2 shows the subrack logical structure of the BBU3910/BBU3900.

Figure 2 Subrack architecture of the BBU3910/BBU3900
Figure 2 Subrack architecture of the BBU3910/BBU3900

ESN

The eBBU530BBU3910&BBU3900BBU is labeled with an ESN, whose position is as follows:

  • When a label is provided on the FAN module that is installed in the subrack, print the ESN on the label and a mounting ear of the subrack, as shown in Figure 3.
Figure 3 Position 1 for the ESN
Figure 3 Position 1 for the ESN

  • When a label is not provided on the FAN module that is installed in the subrack, print the ESN on a mounting ear of the subrack, as shown in Figure 4.
Figure 4 Position 2 for the ESN
Figure 4 Position 2 for the ESN
NOTE:

The ESN is a unique identifier of an NE, which is used during base station commissioning.

Slot Assignment

This chapter describes the slot distribution, the principles for BBU3910/BBU3900 slot assignment and the typical configuration of BBU3910/BBU3900 boards.

Slot distribution

Figure 5 shows the BBU3910/BBU3900 slot distribution.

Figure 5 BBU3910/BBU3900 slot distribution
Figure 5 BBU3910/BBU3900 slot distribution

Principles for BBU3910/BBU3900 slot assignment

NOTE:

  • The BBU3910/BBU3900supported subrack includes BBU3910 and BBU3900. A BBU3900 subrack has no silkscreen. A BBU3910 subrack has a BBU3910 silkscreen.
  • A FANe or UPEUd can be installed only in a BBU3910, a FANc or UPEUc can be installed only in a BBU3900.
  • The BBU3910 only supports UMPTb2 and UBBP, does not support LMPT and LBBP.

Table 1 shows the BBU3910/BBU3900 slot assignment.

Table 1 Principles for BBU3910/BBU3900 slot assignment

Board Name

Optional/Mandatory

Typical Configuration Quantity

Board Name

Maximum Configuration Quantity

Slot Assignment Sequence (The preceding is preferred)

Remarks

Main processing and transmission board

Mandatory

1

UMPTb2

2

Slot7>Slot6

One UMPTb2 or LMPT with the GPS satellite card is configured in each BBU3910/BBU3900 by default. The recommended slot is 7. In cold backup ring topology, two UMPTb2 need to be configured and the LMPT is not supported.

LMPT

1

Slot7>Slot6

Core network processing board

Optional

1

CNPUb

1

Slot6>Slot7

This board is configured when the fallback function is required. It is recommended to insert this board in slot 6.

  • Configuration principles of software: The boards in one BBU3910/BBU3900 must be in the same version. The UMPTb2 is only used in V100R004C10.
  • Configuration principles of hardware:
    • The CNPUb must be used with UMPTb2.
    • The CNPU must be used with LMPT.

CNPU

1

Slot6>Slot7

Baseband processing board

Mandatory

1

UBBP

6

Slot3>Slot2>Slot1>Slot0>Slot4>Slot5

At most six boards are supported.

  • UBBP and LBBP are supported. In the TDD scenario, UBBPd4, UBBPd6 and LBBPd4 are used. In the FDD scenario, UBBPd4 and LBBPd2 are used.
  • UBBPd6 is recommended to be used in the following TDD network scenarios.
    • Cell combination/SFN combination/Dual-eRRU for one sector
    • eRRU cascade/Multi-level cascading cold backup ring topology

LBBP

6

Slot3>Slot2>Slot1>Slot0>Slot4>Slot5

Universal satellite card and clock board

Optional

1

USCUb22

1

Slot5>Slot1

This board is configured when the GPS and GLONASS satellite cards are required or in the 1PPS+TOD time synchronization scenario. The USCUb22 board occupies two slots. That is, if the board is installed in slot 5, slot 4 is also occupied.

Fan module

Mandatory

1

FAN

1

FAN(Slot16)

A FANe can be installed only in a BBU3910, a FANc can be installed only in a BBU3900.

Power module

Mandatory

1

UPEU

2

POWER1(Slot19)>POWER0(Slot18)

  • A UPEUd can be installed only in a BBU3910 with one built-in UPEUd. When the power of the BBU3910/BBU3900 is less than 650 W and power supply backup is required, one more UPEUd need to be configured.
  • A UPEUc can be installed only in a BBU3900 with one built-in UPEUc. One more UPEUc is configured in the following scenarios.
    • Power of the BBU3910/BBU3900 is less than 360 W but power supply backup is required.
    • Power of the BBU3910/BBU3900 exceeds 360 W. (More than three baseband processing boards are configured).
NOTE:

For details of calculating the BBU3910/BBU3900 power, see the power consumption specifications of boards in Equipment Specifications.

Environment monitoring board

Optional

0

UEIU

1

POWER0(Slot18)

  • When a UPEU power module cannot meet the monitoring requirement from users, configure a UEIU.
  • The UEIU shares a slot with the UPEU. When two UPEUs are configured for hot backup, the UEIU cannot be configured but replaced by the second UPEU.

FE/GE surge protection board

Optional

0

UFLP

1

Slot6>Slot5

The UFLP includes UFLPb and UFLPc. It supports surge protection for FE/GE electrical ports. This board is configured when FE/GE Ethernet cables are routed outdoors.

  • The UFLP is preferred to be inserted into the SLPU surge protection box.
  • When an UMPTb2 or LMPT is configured in the BBU3910/BBU3900, it is recommended to insert the UFLP in slot 6.

Typical configuration of boards

Figure 6 shows the typical configuration of boards in an BBU3910/BBU3900.

Figure 6 Typical configuration of boards in an BBU3910/BBU3900
Figure 6 Typical configuration of boards in an BBU3910/BBU3900
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