INTERNAL
BSC6910 Hardware and
Capacity Expansion
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Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
BSC6910 - Content
1. BSC6910 Hardware and Capacity Expansion
2. BSC6910 Configuration Principle
3. BSC6910 Commissioning Guide
4. Transmission Resource Pool in RNC/BSC
5. BSC6910 WCDMA Initial Data Configuration
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 2
BSC6910 - A New-Generation Large-Capacity RNC
3 x User Plane (Throughput: 40 Gbit/s120
Gbit/s)
12 x Control Plane (BHCA: 5.3 KK->64 KK)
N in 1 Processing Board (Unified Board)
Cloud Architecture for Future (Ready for
RNC in POOL)
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 3
BSC6910 - Cabinet
1. Subrack: PARCb subracks are used. Boards are installed on
the front and rear sides of the backplane. One subrack
provides 28 slots. Subracks are powered independently.
(The BSC6900 cabinet is powered in a centralized manner.)
2. Air channel: Each subrack is provided with an independent
air channel, with the air intake vent at the front side and air
exhaust vent at the rear side. (The BSC6900 cabinet uses a
centralized air channel, with the air intake vent at the bottom
and air exhaust vent at the top.)
3. Cable trough: The rear half of each subrack is provided with
a cable trough for optical fibers. (Cable troughs are provided
at both the front and rear half of each subrack in the
BSC6900 cabinet.)
4.
Cabinet: The appearance of BSC6910 cabinet is the same
as BSC6900 cabinet, but their power distribution and
ventilation methods are different. Therefore, the BSC6910
cannot use the cabinet of the BSC6900.
5. The BSC6910 can be configured with two cabinets with six
subracks at most. The concepts of the main processing
subrack (MPS) and main processing rack (MPR) are the
same as those of BSC6900.
The hardware configuration for the BSC6910 UMTS is as follows:
Minimum: one cabinet with a main processing subrack (MPS)
Maximum: two cabinets with an MPS and five extended processing subracks (EPSs)
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 4
BSC6910 – Power Connection between PDF
and BSC
-
-
-
-
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
To create backup, connect OUTPUT A
and OUTPUT B to a different power
supply group
PDF connect to the power inputs on
each subrack
In each subrack, there are 2 power
entry modules(PEMs).
In each PEM, there are 2 power inputs.
PEM 00 and PEM 01 work in active and
standby mode. It work concurrently in
normal case. If either of them become
faulty, the other PEM continues to
supply power to the system.
The 2 power out puts of PEM work in
load sharing mode.
BSC6910 – Relationship between power
outputs and inputs
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 6
BSC6910 - Interconnection Between
Subracks
1. BSC6910 uses the switching board
SCUb of BSC6900. The
interconnection mode between
subracks is the same as the mode
adopted for the BSC6900.
2. 4 x 10GE ports are used to form
chain interconnection among
subracks of the BSC6910.
3. SCUb boards are interconnected
using power cables by default, but
the interconnection distance between
subracks is 10 m at most. Optical
fibers can be used for achieving a
longer interconnection distance.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 7
BSC6910 - Subracks
PEM transit
card
Copper
bar
Subrack
backplane
Copper
bar
Slot 14
Slot 20 Slot 21
Slot 27
Slot 0
Slot 6 Slot 7
Slot 13
- Each subrack is provided with two layers of fan boxes.
- Each subrack is configured with two power entry modules (PEMs) working in load sharing mode.
- Each PEM is connected to two 63 Amps current outputs on the power distribution frame (PDF)
- The two PEMs of one subrack are connected to different PDF current outputs so that one PEM
failure or one group of PDF output failure will not interrupt the power supply.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 8
Appearance of the PEM

Functions of the PEM

Provides power supply, surge protection and filtering

Monitors the input power and input voltage of subrack

Monitors the status od air circuits and of surge protection circuits
PEM transit
card
Copper
bar
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Subrack
backplane
Copper
bar
Slot 14
Slot 20 Slot 21
Slot 27
Slot 0
Slot 6 Slot 7
Slot 13
Page 9
BSC6910 - Slots
4
1 Front board slot
2 Backplane
3 Rear board slot
4 switching board slot
10GE port
GE port
1. Each BSC6910 subrack provides 28 slots, among
which there are sixteen 2 x 10GE slots and ten 4 x
GE slots.
2. SCUb boards that used as the switching board are
inserted in slots 20 and 21 fixedly.
3. EOMUa boards are inserted in slots 10 to 13 of the
MPS subrack. Those fixed slots are different from
those of the BSC6900.
4. The rear board slot only provides the cable through
for optical fibers. The interface board needs to be
inserted in the rear subrack.
5. This is different in BSC6900. 10GE interface
boards, such as EXOUa, can use slots 16 to 19
and slots 22 to 25. Other interface boards can use
any slots in the rear half of the subrack.
6. Slots 8 and 9 of the MPS subrack are fixedly
configured with one pair of EGPUa boards, forming
1+1 redundancy for resource management of the
entire system.
7. Other EGPUa boards for service processing form a
resource pool. They can be inserted in any slots.
However, they are preferentially installed in the
front half of the subrack because the rear half is
reserved for interface boards.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 10
BSC6910 - Boards
Reused boards
New boards
Function
Physical Board
Description
Function
Description
OMU
SAU
UCUP
GCUP
RMP
GMCP
NASP
EOMUa
ESAUa
Evolved OMU board
Evolved SAU board
Physical
Board
SCU
SCUb
GE Switch and
Control Board
GCK
GCUa/GCGa General Clock Unit
INT
EXOUa
NIU
ENIUa
EGPUa/EXPUa
(EXPUa used
Evolved General
only on 2G
Processing board
networks)
Evolved 10GE interface
board
Evolved Network
Intelligence Unit
GOUc/FG2c
INT
AOUc/UOIc
POUc
IP transmission
interface board
ATM transmission
interface board
TDM Interface Unit(4
STM-1, Channelized)
* The SPU and DPU processing boards of BSC6900 is replaced by single processing board EGPU.
* RMP: Resource Management Processing, for managing resources
* GCUP: GSM CP and UP Processing, for processing GSM services
* UCUP: UMTS CP and UP Processing, for processing UMTS services
* EXPUa: used only on the GSM network, with the same specifications as EGPUa
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 11
BSC6910 – EGPUa Board
DPUb
DPUe
SPUa
SPUb
DPUc
DPUd
DPUf
DPUg
XPUa
EGPUa
• EGPU boards in BSC6910 use for both control and
user plane which work in N+1 configuration.
• Also the EGPU boards process both CS and PS
user data
• For EGPU board, it automatically adjust the NodeB
or cell on the board. There is on requirement for
specify subsystem number while configuring NodeB
• When it is used on the UMTS control plane, its
processing capability is equal to 6.4 times of the
processing capability of an SPUb board.
• When it is used on the UMTS user plane, its
processing capability is equal to 2.5 times of the
processing capability of a DPUe board.
XPUb
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 12
EGPU Processing capability
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 13
BSC6910 - EOMUa and ESAUa
1.
2.
3.
The EOMUa board and ESAUa board of the
BSC6910 also have the functions of the OMUa
board and SAUa board of the BS6900 and provide
stronger processing capability and larger storage
space (CPU: Intel X86 8-core, memory: 32 GB,
hard disk: 600 GB).
Each EOMUa board or ESAUa board uses two
slots.
An EOMUa board can provide 4 times of space of
an OMUa board for storing call history records
(CHRs).
1 Captive screw
2 Front panel
3 Self-locking latch
4 RUN indicator
5 ALM indicator
6 ACT indicator
7 RESET button
8 SHUTDOWN button
9 USB interface
10 ETH0 port
11 ETH1 port
12 ETH2 port
13 VGA interface
14 HD0_RAID/ ALM
indicator
15 HD0_ACT
indicator
16 HD1_RAID/ ALM
indicator
17 HD1_ACT
indicator
18 OFFLINE
indicator
19 Hard disk
20 Screw fixing the
hard disk
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Page 14
EOMUa and ESAUa Board

Evolved Operation and Maintenance

2 Boards must be installed on BSC6910

One EOMUa board occupies 2 slots.

It’s recommended that EOMUa boards be installed in a lot 10 and 12 of MPS.

Performs the configuration management, fault management, security management and
loading management functions for the system.

Enables LMT or M2000 users to perform operation and maintenance on the BSC6910 to
control the communication between the LMT or M2000 and the host boards of BSC6910

Evolved Service Aware Unit

ESAUa board collects and preprocesses the data reported by NEs. Then upload the data
to M2000

One ESAUa board occupies two slots. ESAUa boards can be installed in slots where the
SCUb, GCUa, and GCGa boards are not installed. It is recommended that the ESAUa
board be installed in slots 0 to 1
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 15
BSC6910 – EXOUa Board
Evolved 2 10GE Port Optical Interface Unit.
1. The EXOUa boards can be installed in slots 16
to 19 and 22 to 25.
2. An 10GE interface board EXOUa of the
BSC6910 provides two 10GE optical interfaces.
3. An EXOUa board supports 75,000 Erl or 10
Gbit/s PS service throughput.
4. The EXOUa board supports 1,500 base stations.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 16
BSC6910 - System Capacity
BSC6900
BSC6910
Cabinet
Power
consumption
4,800 W + 4,800 W
7,100 W
7,100 W + 7,100 W
UMTS
Capacity
BHCA 5,300 K
Iub throughput 40 Gbit/s
NodeB 3,000
Cell 5,100
BHCA 32,000 K
Iub throughput 60 Gbit/s
NodeB 5,000
Cell 10,000
BHCA 64,000 K
Iub throughput 120
Gbit/s
NodeB 10,000
Cell 20,000
GSM
Capacity
Two-cabinet configuration is
not supported.
All IP: 24,000 TRXs, 150,000
Specifications of a single
Erl
cabinet:
Abis TDM+A IP: 10,000
All IPs: 8,192 TRXs, 45,000
TRXs, 62,500 Erl
Erl
Two-cabinet
configuration is not
supported.
*7,100 W is a software limitation for BSC6910 to lower the impact to equipment room.
BSC6910 heat dissipation system has the capability to support 6000 W per subrack, and is ready for future evolution.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 17
BSC6910 - Board Resource Pool
In BSC6910, a pair of EGPUa boards are
configured for resource management
processing (RMP) using 1+1 backup.
1. The service processing board EGPUa can be
configured as the UCUP mode for processing UMTS
services
2. Resources in the GSM and UMTS resource pools
cannot be automatically shared, but they can be
shared after the logical type of the EGPUa board is
changed.
3. Being different from the 1+1 master and backup SPUb
boards, the EGPUa boards in the two resource pools
both work in the master status and no backup EGPUa
boards are provided.
4. The UP part on the EGPUa board is not backed up,
which is similar to the DPUe board. The CP part is
backed up by software progresses hashed on the
neighboring boards. Upon faults, some progresses
enter the master state, replacing the functions of the
backup SPUb board.
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Page 18
BSC6910 - UCUP Resource Pool and
Resource Sharing
Resource Sharing (UMTS Only)
1. On UMTS networks, the traffic model changes frequently,
which greatly affects the processing capability of the
CP/UP. BSC6910 supports manual and automatic
capability sharing between the CP and UP.
2. When the EGPUa board is used for UCUP, the multiple
subsystems on the board are used for CP or UP
processing. The CP and UP are dynamically adjusted by
performing the following operations: Stop some
subsystems, then restart these subsystems and enable
them to use new software functions, and add them to a
new resource pool.
CP
1. All CP subsystems in RNC form a CP POOL.
2. All UP subsystems in RNC form a UP POOL.
CP
UP
UP
* Introduction to the RNC UP and CP Resource Sharing Feature
describes this feature.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 19
BSC6910 - NodeB/Cell Resource
Management Sharing
Resource Sharing (UMTS Only)
NodeB1
NodeB2
Automatic
Allocation
GPU1
C
P
NodeB1
NodeB2
NodeB3
GPU2
NodeB1
NodeB2
NodeB3
GPU1
GPU2
GPU3
Automatic
reallocation
Add boards
CP POOL
C
P
NodeB3
GPU1
GPU2
GPU3
UP POOL
C
P
U
P
U
P
1. In initial configuration, the system
automatically selects the processing
subsystems of NodeBs and cells.
U
P
2. When the system is running, adding a new board or the
emergence of a hotspot cell or hotspot site will lead to load
imbalance between subsystems. The BSC6910 can monitor
the status of subsystems and automatically adjust load.
* Introduction to the Automatic NodeB and Cell Allocation in the RNC Feature describes this feature.
* This feature is only applied in UMTS networks. This feature is not supported by GSM networks because the traffic model on GSM
networks is relatively table.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 20
BSC6910 - UMTS Dimensioning
Principles
Functional boards of BSC6910 and BSC6900 are compared as follows:
Dimension
BSC6900
BSC6910
Capacity
Signaling boards SPUb
EGPUa
1 pcs EGPUa = 6.4 pairs
of SPUb
User traffic
boards
EGPUa
1 pcs EGPUa = 2.5 pcs
DPUe
GOUc
FG2c
AOUc
UOIc
No change
EXOUa
75,000 Erl, or 10 Gbit/s
PS service throughput,
1500 NodeB
ENIUa
1 pcs ENIUa = 2.5 pcs
NIUa
DPUe
GOUc
FG2c
Interface boards
AOUc
UOIc
Interface boards
Service
awareness
boards
NIUa
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 21
BSC6910 - UMTS Dimensioning
Principles
Board
Used for
2.
3.
4.
Memo
UP Only
PS Throughput 2,000 Mbit/s or
10,050 CS Erlang, 1,400 cells,
28,000 active users, unlimited online users
PS throughput is calculated based on
the UL/DL rate of 64/384 kbit/s.
CP Only
1.668 KK BHCA,
700 NodeBs and 1,400 cells,
36,000 active users,
70,000 on-line users
Busy hour call attempts (BHCAs) are
calculated based on Huawei
smartphone traffic model.
EGPUa
1.
Specification
The UMTS dimensioning principles of BSC6910 is basically the same as BSC6900. The only
difference is that the dimension of an SPUb board and DPUe board is replaced by the
dimension of a EGPUa board.
The number of EGPUa boards on the CP and UP are calculated separately based on the
capability requirements of the network on the CP and UP. The following formula is used:
Total number of EGPUa boards = Number of EGPUa boards used on the CP + Number of
EGPUa boards used on the UP + One backup EGPUa board at least + Two EGPUa boards
used for resource management
The CPU overload threshold of the BSC6910 is 70%
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 22
BSC6910 - Hardware Capacity License
•
The license control mechanism of BSC6910 is basically the same as BSC6900, including
feature licenses, system capacity licenses, and hardware licenses.
•
The feature license functions based on features and is basically the same as that of the
BSC6900. (For details about the features supported by the BSC6910 and features not
supported by the BSC6910 but supported by the BSC6900, see the Feature List in RAN15.0.)
•
The system capacity license has the same dimension as that of BSC6900. By default, 1 CS
Erlang is equal to 64 kbit/s PS throughput in the BSC6900. In the BSC6910, 1 CS Erlang is
equal to 24.4 kbit/s PS throughput. The conversion coefficient in the BSC6910 is commonly
used. If only the PS traffic capacity is for sales, the conversion coefficient customized for sales
is used.
•
The new EGPUa board has a larger capacity and can be shared by the GSM and UMTS. A
hardware license is required to control the board capacity. The hardware license is similar to
that of the DPUe board of the BSC6900. The major difference is that the DPUe board has 335
Mbit/s capacity when the hardware license is not activated, while the EGPUa board has no
capacity if the hardware license is not activated. Hardware licenses include:
3G:
-Hardware capacity sold based on every 50 Mbit/s throughput on the RNC
-Hardware capacity sold based on every 1000 active users on the RNC (active users
refers to online users in the CELL_DCH state and CELL_FACH state.)
2G:
-Hardware capacity sold based on every TRX on the BSC
-Hardware capacity sold based on every PDCH on the BSC
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 23
BSC6910 - Power Consumption
Calculation
 Calculation Formula:
1. System power consumption = Pavg x Number of each type of boards + Pavg of fans)
2. Heat dissipation capability in the equipment room = System power consumption
3. Maximum subrack power consumption = 4,000 W, Maximum cabinet power consumption = 7,100 W
 Concepts:
• Average power consumption (Pavg) is the estimated value in a typical operating environment. The
maximum power consumption mentioned in hardware description is obtained when all devices on boards
are full-loaded. This maximum power consumption cannot be obtained under the actual system running
conditions. Therefore, Pavg is provided for power consumption calculation.
• Maximum subrack power consumption is 4,000 W (including the power consumption of fans) which is
obtained when all slots of the subrack are configured with boards. It is recommended that power
distribution be configured as 4000 W per subrack. This can save power distribution adjustment upon
future capacity expansion.
• Maximum cabinet power consumption is 7,100 W which is the upper limit of the heat dissipation
capability in the equipment room and obtained based on survey and research. Therefore, the maximum
cabinet power consumption is not 12,000 W.
Description
Pavg
Fan Box
200
EGPUa/EXPUa/ENIUa/EXOUa
102
GCGa
20
SCUb
80
GOUc/FG2c/AOUc/UOIc/POUc
80
EOMUa/ESAUa
102
* This table is used for power
consumption calculation. It is for
internal use only and should not
be spread without permission.
Page 24
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Summary
With new hardware platforms, software platforms, and universal
processing boards, the BSC6910 achieves significant system capacity
expansion. Therefore, the BSC6910 can better adapt to the signaling
impact of smart phones on the network.
The tools and features for BSC6900 operation and maintenance (O&M)
are also used for BSC6910 O&M. Besides, BSC6910 O&M is simplified
by sharing the UP and CP and automatically allocating NodeBs and cells.
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.
Page 25