1 BSC6910 Hardware Capacity Expansion

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BSC6910 Hardware and Capacity Expansion www.huawei.com

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


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)


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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.

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BSC6910 – Power Connection between PDF and BSC -

-

-


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


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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.


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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.


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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


Subrack backplane

Copper bar

Slot 14

Slot 20 Slot 21

Slot 27

Slot 0

Slot 6 Slot 7

Slot 13

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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.


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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


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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


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EGPU Processing capability


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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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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


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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.


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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



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.


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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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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.


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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.


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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


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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%


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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


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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.


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1 BSC6910 Hardware Capacity Expansion

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