SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Product Description
Issue
Draft A
Date
2012-05-30
HUAWEI TECHNOLOGIES CO., LTD.
SRAN8.0&GBSS15.0&RAN15.0
Description
BSC6910
Product
Contents
Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
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Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
http://www.huawei.com
Email:
support@huawei.com
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Description
BSC6910
Product
Contents
Contents
1 Introduction ........................................................................................................................... 1-1
1.1 Positioning .................................................................................................................................................... 1-1
1.2 Benefits ......................................................................................................................................................... 1-3
2 Architecture ............................................................................................................................. 2-1
2.1 Overview ....................................................................................................................................................... 2-1
2.2 Hardware Architecture .................................................................................................................................. 2-1
2.2.1 Cabinets ............................................................................................................................................... 2-1
2.2.2 Subracks ............................................................................................................................................... 2-2
2.2.3 Boards .................................................................................................................................................. 2-3
2.3 Software Architecture .................................................................................................................................... 2-6
2.4 Reliability ...................................................................................................................................................... 2-7
2.4.1 System Reliability ................................................................................................................................ 2-8
2.4.2 Hardware Reliability ............................................................................................................................ 2-8
2.4.3 Software Reliability ............................................................................................................................. 2-9
3 Configurations ......................................................................................................................... 3-1
3.1 Overview ....................................................................................................................................................... 3-1
3.2 Capacity Configuration of the BSC6910 GSM ............................................................................................. 3-2
3.3 Capacity Configuration of the BSC6910 UMTS........................................................................................... 3-3
3.3.1 Capacity of the BSC6910 UMTS in the High-PS Traffic Model ......................................................... 3-3
3.3.2 Capacity of the BSC6910 UMTS in the Traffic Model for Smart Phones ........................................... 3-4
3.4 Capacity Configuration of the BSC6910 GU ................................................................................................ 3-5
4 Operation and Maintenance ................................................................................................ 4-1
4.1 Overview ....................................................................................................................................................... 4-1
4.2 Benefits ......................................................................................................................................................... 4-2
5 Technical Specifications .......................................................................................................... 5-1
5.1 Technical Specifications ................................................................................................................................ 5-1
5.1.1 Capacity Specifications ........................................................................................................................ 5-1
5.1.2 Structural Specifications ...................................................................................................................... 5-2
5.1.3 Clock Specifications ............................................................................................................................ 5-2
5.1.4 Electrical Specifications ....................................................................................................................... 5-3
5.1.5 Space Specifications ............................................................................................................................ 5-3
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Description
BSC6910
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Contents
5.1.6 Environmental Specifications .............................................................................................................. 5-4
5.1.7 Transmission Ports ............................................................................................................................... 5-4
5.1.8 Reliability Specifications ..................................................................................................................... 5-4
5.2 Compliance Standards ................................................................................................................................... 5-5
5.2.1 Power Supply Standard ........................................................................................................................ 5-5
5.2.2 Grounding Standard ............................................................................................................................. 5-5
5.2.3 Environment Standards ........................................................................................................................ 5-5
5.2.4 Safety Standards ................................................................................................................................... 5-5
5.2.5 EMC Standards .................................................................................................................................... 5-6
5.2.6 Environment Standards ........................................................................................................................ 5-6
6 Acronyms and Abbreviation ............................................................................................... 6-1
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Description
BSC 6910
Product
1 Introduction
1
Intr duction
1.1 Positioning
This document appli s to BSC6910 V100R015.
Based on the BSC6900, the BSC6910 is a new generation product employing a cutting-edge
system architecture. he BSC6910 can accommodate the growing traffic o the mobile
broadband network, provide diversified services, and support the evolution to cloud
computing.
Figure 1-1 shows th BSC6910.
Figure 1-1 BSC6910
Like the BSC6900, t e BSC6910 can be flexibly configured as a BSC6910 GSM, BSC6910
UMTS, or BSC6910 GU. The BSC6910 GSM and BSC6910 UMTS are re erred to as the
BSC6910 in independent mode, and the BSC6910 GU is referred to as the SC6910 in
integrated mode. Th BSC6910 GSM and BSC6910 UMTS support the co-cabinet solution,
meaning their board can be installed in one cabinet. The BSC6910 suppor s GU features
such as co-OAM (O eration and management), Co-Radio Resource Management (Co-RRM),
and Co-Transmissio Resources Management (Co-TRM). The BSC6910 c nnects to GSM
and UMTS core net orks (CNs) and manages base stations in GSM and U TS networks.
Figure 1-2 shows th position of the BSC6910 in the network.
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Description
BSC6910
Product
1 Introduction
Figure 1-2 Position of the BSC6910 in the network
The interfaces between the BSC6910 and each network element (NE) in the UMTS network
are as follows:

Iub: the interface between the BSC6910 and the NodeB

Iur: the interface between the BSC6910 and the RNC

Iur-g: the interface between the BSC6910 and the BSC

Iu-CS: the interface between the BSC6910 and the mobile switching center (MSC) or
media gateway (MGW)

Iu-PC: the interface between the BSC6910 and the serving mobile location center
(SMLC)

Iu-PS: the interface between the BSC6910 and the serving GPRS support node (SGSN)

Iu-BC: the interface between the BSC6910 and the cell broadcast center (CBC)
These interfaces are standard interfaces, through which the BSC6910 can be interconnected
with the equipment from different vendors.
The interfaces between the BSC6910 and each NE in the GSM network are as follows:

Abis: the interface between the BSC6910 and the BTS

A: the interface between the BSC6910 and the MSC or MGW

Gb: the interface between the BSC6910 and the SGSN

Lb: the interface between the BSC6910 and the SMLC
The A and Gb interfaces are standard interfaces, through which the BSC6910 can be
interconnected with the equipment from different vendors.
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Description
BSC6910
Product
2 Architecture
Figure 2-2 Front view (left) and rear view (right) of the subrack
The BSC6910 subracks are classified into the MPS and EPS, as described in Table 2-1.
Table 2-1 Classification of the BSC6910 subracks
Subrack
Quantity
Function
MPS
1
The MPS performs centralized switching and
provides service paths for other subracks. It
also provides the service processing interface,
O&M interface, and system clock interface.
EPS
0–5
The EPS performs the functions of user plane
processing and signaling control.
2.2.3 Boards
The BSC6910 boards can be classified into the O&M board, switching processing board,
clock processing board, general processing board, service identification board, and interface
processing board, as described in Table 2-2.
Table 2-2 Classification of the BSC6910 boards
Board Type
Board
Name
Full Name
Function
General
processing
board
EGPUa
Evolved General Processing
Unit REV:a

Manages user plane and
control plane resource
pools.

Processes user plane and
control plane services for
the BSC and RNC.
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2 Architecture
Board Type
Board
Name
Full Name
Function
O&M board
EOMUa
Evolved Operation and
Maintenance Unit REV:a

Performs configuration
management,
performance
management, fault
management, security
management, and loading
management for the
BSC6910.

Works as the O&M
bridge of the
LMT/M2000 to provide
the BSC6910 O&M
interface for the
LMT/M2000 and to
enable communication
between the BSC6910
and the LMT/M2000.

Works as the interface to
provide the Web-based
online help.

Collects data about the
call history record (CHR)
and pre-processes the
collected data.

Filters and summarizes
raw data of the BSC6910
as required by the Nastar
and uploads the preprocessed data to the
Nastar through the
M2000 for analysis.

Provides MAC/GE
switching and enables the
convergence of ATM and
IP networks. MAC is
short for Media Access
Control and ATM is
short for asynchronous
transfer mode.

Provides data switching
channels.

Provides system-level or
subrack-level
configuration and
maintenance.

Distributes clock signals
for the BSC6910.
ESAUa
Switching
processing
board
SCUb
Evolved Service Aware
Unit REV:a
GE Switching network and
Control Unit REV:b
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2 Architecture
Board Type
Board
Name
Full Name
Function
Clock
processing
board
GCUa
General Clock Unit REV:a
GCGa
General Clock unit with
GPS REV:a
Obtains the system clock
source, performs the
functions of phase-lock and
holdover, and provides
clock signals.
Unlike the GCUa board,
the GCGa board can
receive and process GPS
signals.
Service
identification
board
ENIUa
Evolved Network
Intelligence Unit REV:a
Provides the service
identification function and
works with the service
processing boards to
schedule different types of
services.
Interface
processing
board
EXOUa
Evolved 2-port 10GE
Optical interface Unit
REV:a

Provides two channels
over 10 Gbit/s optical
ports.

Supports IP over GE.

Provides 12 channels
over FE or 4 channels
over GE electrical ports.

Supports IP over FE/GE.
4-port packet over GE
Optical interface Unit
REV:c

Provides four channels
over GE optical ports.

Supports IP over GE.
4-port ATM over
channelized Optical STM1/OC-3 interface Unit
REV:c

Provides four channels of
ATM over channelized
optical STM-1/OC-3.

Supports ATM over
E1/T1 over
SDH/SONET.

Provides 252 E1s or 336
T1s.

Extracts clock signals
and sends the signals to
the GCUa or GCGa
board.
FG2c
GOUc
AOUc
12-port FE or 4-port
electronic GE interface unit
REV:c
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Description
Board Type
BSC6910
Product
2 Architecture
Board
Name
Full Name
Function
UOIc
8-port ATM over
Unchannelized Optical
STM-1/OC-3 Interface unit
REV:c

Provides eight channels
over unchannelized
STM-1/OC-3c.

Supports ATM over
SDH/SONET.

Extracts clock signals
and sends the signals to
the GCUa or GCGa
board.

Provides four channels of
TDM/IP over
channelized optical
STM-1/OC-3.

Supports IP over E1/T1
over SDH/SONET.

Supports a load
equivalent to 252 E1s or
336 T1s.

Extracts clock signals
and sends the signals to
the GCUa or GCGa
board.
POUc
4-port IP over channelized
Optical STM-1/OC-3
interface Unit REV:c
2.3 Software Architecture
The BSC6910 inherits the layered software architecture of the BSC6900. By deploying
different application software on a unified base platform, the BSC6910 provides different
services. Each layer and each plane are deployed on its lower layer and provide services for
its upper layer and other planes. At the same time, the technical implementation of each layer,
such as algorithms and physical deployment, is isolated from other layers so that each layer
and each plane are dedicated to its own functions and evolve independently. Error!
Reference source not found. shows the BSC6910 software architecture.
SRAN8.0&GBSS15.0&RAN15.0
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Description
BSC 6910
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2 Architecture
Figure 2-3 BSC6910 software architecture
Error! Reference s urce not found. describes the functions of each plane in the BSC6910
software architectur .
Table 2-3 Functions f each plane in the BSC6910 software architecture
Plane
Function
Base platform
Provides the operating system (OS) and basic fu ctions, such as
cross-process communication, message manage ent, redundant
backup, and software management.
OM mechanism pl ne
Provides O&M functions for the system, and provides
communication with the network management s stem (NMS)
through the southbound interface.
Application OM
plane
Provides configuration management, maintenance management,
performance management, alarm management, and log
management for the system.
Resource
management plane
Manages user plane, control plane, and transport plane resources.
Function plane
Processes GSM and UMTS call services accordi g to 3GPP
specifications.
2.4 Reliability
The resource pool d sign and redundancy mechanism are widely used in the system reliability
design of the BSC6910. The techniques of detecting and isolating the faults in the boards and
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Description
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2 Architecture
in the system are optimized and the software fault tolerance capability is improved to enhance
system reliability.
2.4.1 System Reliability
The BSC6910 system reliability is ensured by the following features:

High-reliability architecture design
Port trunking technology is employed on the active and standby switching boards. The
ports in a port trunking group work in load sharing mode. When a link between the
SCUb boards in different subracks is faulty, the system transfers the services carried on
the faulty link to other links and isolates the faulty link. In addition, the SCUb boards in
different subracks are cross-connected, preventing a port failure on the SCUb board in
one subrack from affecting the SCUb boards in another subrack. This improves the
reliability of intra-controller communication.
Dual clock planes are used in the clock transmission between the GCUa/GCGa board
and the SCUb board. Therefore, a single failure does not affect the normal operation of
the system clock.

Resource pool design
The system implements load sharing on the control plane and on the user plane by
employing a full resource pool design. This effectively prevents suspension of service in
case of overload, improving resource utilization and system reliability.

Active/standby switchover
All BSC6910 hardware supports active/standby switchover. Quick switchover between
active and standby parts improves system reliability. In addition, quick fault detection
and recovery minimizes the impact of faults on services.

Flow control
The system performs flow control based on the central processing unit (CPU) and
memory usage. Therefore, the BSC6910 can continue working by regulating the items
pertaining to performance monitoring, resource auditing, and resource scheduling in the
case of CPU overload and resource insufficiency. In this way, the system reliability is
enhanced.
2.4.2 Hardware Reliability
The BSC6910 hardware reliability is ensured by the following features:

The system uses the multi-level cascaded and distributed cluster control mode. Several
CPUs form a cluster processing system. The communication channels between CPUs are
based on the redundancy design or anti-suspension/breakdown design.

The system uses the redundancy design, as described in Error! Reference source not
found., to support the hot swap of boards and backup of boards and ports. Therefore, the
system has a strong fault tolerance capability.
Table 2-4 Board redundancy
Board
Redundancy Mode
EGPUa
Board resource pool
EXOUa
Board redundancy + board resource pool + 10 Gbit/s GE port
redundancy or load sharing