bsc6810 product description - rnc

RAN11.0 BSC6810 Product Description

Issue 05

Date 2009-03-25

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd.

Copyright Huawei Technologies Co., Ltd. 2009. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided AS IS without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website: http://www.huawei.com

Email: [email protected]


Issue 05 (2009-03-25) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iii

Contents

1 Introduction .................................................................................................................... 1 1.1 Positioning .................................................................................................................................. 1 1.2 Product Features & Advantages .................................................................................................. 3

2 Architecture .................................................................................................................... 5 2.1 Overview..................................................................................................................................... 5 2.2 Hardware Architecture ................................................................................................................. 5

2.2.1 Cabinet ............................................................................................................................... 5 2.2.2 Subracks............................................................................................................................. 5 2.2.3 Board.................................................................................................................................. 6

2.3 Logical Structure.......................................................................................................................... 9 2.4 Reliability................................................................................................................................... 10

2.4.1 System Reliability.............................................................................................................. 10 2.4.2 Hardware Reliability ...........................................................................................................11 2.4.3 Software Reliability............................................................................................................ 12

3 Configurations.............................................................................................................. 14 3.1 Overview................................................................................................................................... 14 3.2 Minimum Configuration.............................................................................................................. 14 3.3 Maximum Configuration............................................................................................................. 15

4 Operation and Maintenance ........................................................................................ 16 4.1 Overview................................................................................................................................... 16 4.2 Benefits..................................................................................................................................... 17

5 Technical Specifications.............................................................................................. 19 5.1 Technical Specifications............................................................................................................. 19

5.1.1 Capacity Specifications ..................................................................................................... 19 5.1.2 Structural Specifications .................................................................................................... 20 5.1.3 Clock Specifications .......................................................................................................... 20 5.1.4 Power Consumption.......................................................................................................... 21 5.1.5 Space Specifications ......................................................................................................... 21 5.1.6 Environmental Specifications............................................................................................. 22 5.1.7 Transmission Ports............................................................................................................ 23 5.1.8 Reliability Specifications.................................................................................................... 23


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5.2 Compliance Standards............................................................................................................... 23 5.2.1 Power Supply Standards ................................................................................................... 23 5.2.2 Grounding Standards ........................................................................................................ 23 5.2.3 Environment Standards ..................................................................................................... 23 5.2.4 Safety Standards............................................................................................................... 24 5.2.5 EMC Standards................................................................................................................. 24 5.2.6 Environment Standards ..................................................................................................... 25

6 Acronyms and Abbreviations...................................................................................... 26


Issue 05 (2009-03-25) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1

1 Introduction 1.1 Positioning

This product description is applicable to the BSC6810 V200R011 version.

The RNC is an important element of the WCDMA network. The UMTS Terrestrial Radio Access Network (UTRAN) consists of RNCs and NodeBs. Figure 1-1 shows the position of the RNC in the WCDMA network.



Figure 1-1 Position of the RNC in the WCDMA network

UTRANUu

UEIu

CN

Iu-CS

MSC server

MGW

Iub

NodeB

NodeB

Iub

NodeB RNC

RNC

Iu-PS

Iu-BC

CBC

SGSN

Iur

Iub

CN: Core Network CBC: Cell Broadcast Center MGW: Media Gateway MSC server: Mobile Switching Center server RNC: Radio Network Controller SGSN: Serving GPRS Support Node UE: User Equipment UTRAN: UMTS Terrestrial Radio Access Network

As shown in Figure 1-1, each RNC can be connected to:

l NodeBs through the lub interface l The MSC (or the MSC server and MGW in R4/R5/R6/R7), which processes

Circuit Switched (CS) services through the Iu-CS interface l The SGSN, which processes Packet Switched (PS) services through the Iu-PS

interface l The CBC, which processes broadcast services through the Iu-BC interface l Another RNC through the Iur interface

The RNC has the following functions:

l Broadcasting system information and controlling UE access l Performing mobility management, such as handover and Serving Radio Network

Subsystem (SRNS) relocation l Performing radio resource management, such as Macro Diversity Combining

(MDC), power control, and cell resource allocation l Providing radio bearer services for both CS and PS domains l Providing transport channels between the CN and UEs



l Ciphering and deciphering the signaling and data on radio channels

The Huawei RNC model is BSC6810. In this document, Huawei RNC is referred to as BSC6810. All the interfaces (Iub, Iur, Iu-CS, Iu-PS, and Iu-BC) of BSC6810 are standard interfaces, which enable the BSC6810 to connect to the NodeB, RNC, MSC, SGSN, and CBC of other vendors.

The BSC6810 uses Huaweis advanced hardware switching platform and software architecture to meet the requirements for wide band and mode convergence during the development of mobile communications. The BSC6810 features large capacity, high integration, excellent performance, and low power consumption. This product is easy to maintain and can smoothly evolve to a GSM/UMTS dual-mode controller. Figure 1-2 shows the cabinet.

Figure 1-2 BSC6810 cabinet

1.2 Product Features & Advantages

Advanced Network Sharing Solutions for cutting costs The BSC6810 uses the advanced RAN sharing, lu Flex, and multiple operator core network (MOCN) functions to meet the requirements for shared networks among multiple telecom operators. Through the newly introduced MOCN function, the RNC can be connected to the core networks of different telecom operators, thus enhancing the network sharing function. This, in turn, helps the telecom operators in reducing costs.

Advanced Solutions Promising Higher Speed for Data Services The BSC6810 uses advanced technologies, such as HSDPA, HSUPA, HSPA+, and MBMS, to meet the requirements of different types of data service. As a newly introduced technology based on HSUPA and HSDPA, HSPA+ further improves the network performance and expands the network capacity.



All-IP Platform Meeting the Varying Needs for Network Evolution Based on its all-IP platform, the BSC6810 UMTS improves the PS service performance. The interfaces support IP transmission, which provides sufficient bandwidth and cuts transmission cost.

GSM/UMTS Co-Platform Ensuring Smooth Evolution The BSC6810 shares the hardware platform with the GSM/UMTS dual-mode network controller and supports smooth evolution to the GSM/UMTS dual-mode network controller. In this way, fewer spare parts are required.



2 Architecture 2.1 Overview

Based on the all-IP platform, the BSC6810 meets the varying needs for network evolution. The BSC6810 has a modular design. It enhances resource utilization and system reliability by applying distributed resource pools to manage the service processing units. In the BSC6810, the backplane is universal, which diversifies the boards and their functions. The BSC6810 improves the universality of hardware platform and the capability of future evolution.

2.2 Hardware Architecture 2.2.1 Cabinet

The BSC6810 uses the standard N68E-22 or N68-21-N cabinet of Huawei. The design complies with the IEC60297 and IEEE standards.

In terms of the configured subrack, the BSC6810 cabinet is classified into RSR ( RNC Switch Rack) and RBR (RNC Business Rack), as shown in Table 2-1. The subracks should be configured from the bottom up.

Table 2-1 Classification of BSC6810 cabinets

Cabinet Contained Subrack Configuration Principle

RSR 1 RNC Switch Subracks (RSS), and 02 RNC Business Subracks (RBS)

One and only one RSR is configured.

RBR 13 RNC Business Subracks (RBS) As required by the service capacity, one or no RBR is configured.

2.2.2 Subracks In compliance with the IEC60297 standard, the BSC6810 subrack has a standard width of 19 inches. The height of each subrack is 12 U. The boards are installed on the front and rear sides of the backplane, which is positioned in the center of the subrack.



A subrack provides 28 slots. The slots on the front of the subrack are numbered from 0 to 13, and those on the rear are numbered from 14 to 27.

Figure 2-1 shows the front view and rear view of the subrack.

Figure 2-1 Front view (left) and rear view (right) of the subrack

Front view Rear view

The BSC6810 subrack is classified into the RSS and RBS, as shown inTable 2-2.

Table 2-2 Classification of BSC6810 subracks

Subrack Configured Number Function

RSS 1 The RSS performs centralized switching and provides service paths for other subracks. It also provides the service processing interface, OM interface, and system clock interface.

RBS 05 The RBS implements user plane processing and signaling control.

2.2.3 Board The BSC6810 boards can be classified into the OM board, switching processing board, clock processing board, signaling processing board, service processing board, and interface processing board, as described in Table 2-3.



Table 2-3 Classification of BSC6810 boards

Board Type Board Name Function

OM board OMUa l Performs configuration management, performance management, fault management, security management, and loading management for the BSC6810.

Works as the OM agent of the LMT/M2000 to provide the BSC6810 OM interface for the LMT/M2000 and to enable the communication between the BSC6810 and the LMT/M2000.

Switching processing board

SCUa l Provides MAC/GE switching and enables the convergence of ATM and IP networks.

l Provides data switching channels. l Provides BSC-level or subrack-level

configuration and maintenance. l Supporting the port trunking function. l Distributes clock signals for the BSC6810.

GCUa Obtains the system clock signal, performs the functions of phase-lock and holdover, and provides clock signals.

Clock processing board

GCGa Implements all the functions of the GCUa, and receives and processes GPS signals.

Signaling processing board

SPUa l Processes high-layer signaling of the Uu, Iu, Iur, and Iub interfaces

l Processing transport layer signaling l Establishing signaling and service

connections l Provides 4 independent processor systems

Service processing board

DPUb Processes voice and data services within the system.

Interface processing board

AEUa l Provides 32 E1s/T1s l Provides ATM over E1/T1 l Supports 32 IMA groups or 32 UNI links

(Each IMA group contains a maximum of 32 IMA links.)

l Provides the fractional ATM and fractional IMA functions

l Provides the timeslot cross connection function

l Provides ATM Adaptation Layer 2 (AAL2) switching

l Extracts the clock from E1/T1 links, exporting 2 MHz signals, and sending the 2 MHz timing signals to the GCUa/GCGa



Board Type Board Name Function

PEUa l Provides 32 E1s/T1s l Supports IP over PPP/MLPPP over E1/T1 l Provides 128 Point-to-Point Protocol (PPP)

links or 32 MLPPP groups (Each MLPPP group contains a maximum of 8 MLPPP links.)

l Provides the timeslot cross connection function

l Receives timing signals from upper-level equipment and sending them to the GCUa/GCGa

l Provides timing signals for NodeBs

AOUa l Provides 2 STM-1/OC-3 optical ports l Provides 126 E1s or 168 T1s l Provides the IMA and UNI functions l Provides 84 IMA groups, each of which

contains 32 E1s/T1s l Provides AAL2 switching l Receives timing signals from upper-level

equipment and sending them to the GCUa/GCGa


UOIa l Provides 4 STM-1/OC-3c optical ports l Provides ATM over SDH or IP over SDH l Receives timing signals from upper-level



POUa l Provides 2 STM-1/OC-3 optical ports l Provides 126 E1s or 168 T1s l Receives timing signals from upper-level



FG2a l Provides 8 FE ports or 2 GE electrical ports l Provides IP over FE or IP over GE

GOUa l Provides 2 GE optical ports l Provides IP over GE



2.3 Logical Structure The modular design of the BSC6810 software structure facilitates future expansion. Table 2-4 describes the functions of the software modules.

Table 2-4 Function description of the BSC6810 software modules

Software Module Function

Internal Switching Module

The functions of the internal switching module are implemented by the SCUa boards. The SCUa in the RSS performs centralized switching and that in the RBS performs second-level switching. Thus, the BSC6810 provides internal MAC switching at two levels. The two-level switching enables complete connection between all modules of the BSC6810.

User Plane Data Processing Module

The functions of the user plane data processing module are mainly implemented by the DPUb boards. This module performs protocol processing at each layer on the user plane data for the RNC. The DPUb boards perform the protocol including Frame Protocol (FP), MDC, MAC, RLC, PDCP, Iu User Plane (Iu UP) and GTP-U protocols.

Control Plane Data Processing Module

The functions of the control plane data processing module are mainly implemented by the SPUa boards. This module processes control plane signaling on each interface for the RNC. The processed messages are of the following types: l Radio Access Network Application Part (RANAP) l NodeB Application Part (NBAP) l Radio Network Subsystem Application Part (RNSAP) l Radio Resource Control (RRC) l Service Area Broadcast Protocol (SABP)

Clock Module The functions of the clock module are mainly implemented by the GCUa/GCGa boards and the clock processing units of other boards. This module provides the clock for the operation of the RNC, generates RFN signals, and provides NodeBs with timing signals. If the RNC requires GPS signals, the GCGa configuration is required.

Transmission Interface Module

The functions of the transmission interface module are mainly implemented by the AEUa, AOUa, UOIa, PEUa, POUa, FG2a, or GOUa boards. This module provides the transmission interface between the BSC6810 and other NEs. In addition, it performs related protocol processing at the transport network layer. For ATM transport, the AAL2 and ATM Adaptation Layer 5 (AAL5) messages are terminated at the transmission interface module. For IP transport, this module processes UDP and IP messages on the user plane and forwards IP messages on the control plane.



Software Module Function

OM Module The functions of the OM module are mainly implemented by the LMT, BAM, and related modules of host boards. This module performs operation and maintenance on the BSC6810.

2.4 Reliability The resource pool and redundancy are widely used in the reliability design of the BSC6810. The techniques of detecting and isolating the faults in the boards and in the system are optimized and the software fault tolerance capability is improved to enhance the system reliability.

2.4.1 System Reliability The following measures are taken to ensure the system reliability of the BSC6810:

l Load control The system performs load control based on the CPU usage, traffic over each interface, and radio resource load of the system. Thus, the BSC6810 can keep on working in case of CPU overload and resource congestion. In this way, the system reliability is enhanced.

l Dynamic sharing of resources in the system The DPUb boards and DSPs work in resource pool mode, that is, all the DSPs in a subrack work as a resource pool. The MPU in a subrack manages and allocates all the user plane resources within the subrack to fulfill intra-subrack sharing of user plane resources. In case of overload, the MPU forwards Radio Resource Control (RRC) connection requests to other subracks to fulfill inter-subrack sharing of user plane resources and intra- and inter-subrack sharing of control plane resources.

l Port trunking SCUa boards support port trunking. This function allows data backup in case of link failure, thus preventing inter-plane switchover and cascading switchover and improving the reliability of intra-system communication.

l Dual planes for timing signal transmission The BSC6810 provides the dual planes for transmission of timing signals between the GCUa/GCGa and SCUa boards. The active and standby GCUa/GCGa boards are connected to the active and standby SCUa boards through the Y-shaped cables. This connection mode ensures proper working of the timing signals for the system if a single-point failure occurs to the GCUa/GCGa, cable, or SCUa. In addition, with the Y-shaped cable, switchover between GCUa/GCGa boards does not affect the SCUa boards.

l Transmission port backup Optical ports support MSP 1:1 or MSP 1+1 redundancy. FE or GE ports support port backup and load sharing between the ports. This improves the reliability of transmission.



l OM dual planes To improve the reliability of OM channels, the BSC6810 provides the OM dual planes, including dual OMUa boards, dual Ethernet adapters, and dual main control boards.

l Crystal Aging Compensation technology The BSC6810 adopts the Huawei-patented Crystal Aging Compensation technology to compensate for frequency deviation caused by the aging of temperature-constant crystal oscillators. This technology protects the clock precision from the influence of the aging of the crystal oscillators and ensures long-term stability and reliability of the system clock.

l Dual 48 V independent power supplies The two independent 48 V power supplies operate at the same time to ensure normal operations in case either of them fails. The failed supply can be restored without a power cut. This improves the reliability and availability of the power system.

2.4.2 Hardware Reliability The BSC6810 uses the reliability methods such as board and port backup and load sharing. In addition, the BSC6810 improves the reliability and maintainability by optimizing the fault detection and isolation techniques for boards and the whole system. The following measures are taken to ensure the hardware reliability of the BSC6810: l The system uses the multi-level cascaded and distributed cluster control mode.

Several CPUs form a cluster processing system. Each module has distinct functions. The communication channels between modules are based on the backup design or anti-suspension/breakdown design.

l The system uses the redundancy design, as shown in Table 2-5, to support hot swap of boards and backup of important modules. Therefore, the system has great error tolerance.

Table 2-5 Parts redundancy

Part Redundancy Mode

GCUa/GCGa Board redundancy

SCUa Board redundancy + port trunking on GE ports

SPUa Board redundancy

DPUb Board resource pool

AOUa Board redundancy + MSP 1:1 optical port redundancy

POUa Board redundancy + MSP 1:1 or MSP 1+1 optical port redundancy

UOIa Board redundancy + MSP 1:1 or MSP 1+1 optical port redundancy

FG2a Board redundancy

GOUa Board redundancy



Part Redundancy Mode

GE port on the FG2a or GOUa

Port redundancy or load sharing

FE port on the FG2a Port redundancy or load sharing

OMUa Board redundancy

l When an entity fails, the isolation mechanism transfers the services to another entity for processing. After the system finds a faulty board in the resource pool, it isolates the board. Then another board in the resource pool will process the subsequent services.

l When a board with a single function fails, restarting the system might clear the fault.

l All boards support dual-BIOS. Faults at one BIOS do not affect startup or operation of the boards.

l The system uses the non-volatile memory to store important data.

2.4.3 Software Reliability The software reliability is reflected by the strong error tolerance capability of the product. When the software is faulty, the error tolerance capability of the product prevents the system from crashing. In other words, the system has self-recovery capabilities. The BSC6810 derives its error tolerance capability from the following aspects: l Scheduled checks on crucial resources

Checks are performed on the software resources of the system. If a resource deadlock occurs due to software exceptions, it is temporary, because the check mechanism ensures that the locked resources are released quickly and that related logs and alarms are generated.

l Task monitoring When the software is running, internal software faults and some hardware faults can be monitored through the monitoring process. The monitoring process monitors the task running status, takes over encountered system exceptions, and reports the exceptions to the OM system.

l Data check Scheduled or event-driven data consistency checks are performed, and related logs and alarms are output.

l Dual-version function The boards of the BSC6810 all work in active/standby working area mode. The active working area is used to store version file that is currently used by the system, whereas the standby working area is used to store a version file that is different from that in the active working area. RNC version upgrades and rollbacks can be achieved through switchovers between the active and standby working areas.

l Data backup Both the Back Administration Module (BAM) and Front Administration Module (FAM) support data backup to ensure data reliability and consistency.



l Operation logs The system logs performed operations. The operation logs help locate and rectify faults caused by improper operations.

l Flow control The BSC6810 automatically performs flow control over the Iub, Iur, and Iu interfaces.



3 Configurations 3.1 Overview

The BSC6810 can be configured with any number of boards, subracks, and cabinets to support different configurations. The minimum configuration can be smoothly upgraded to the maximum configuration in this way.

3.2 Minimum Configuration In minimum configuration, the BSC6810 needs only one RSR that has only the RSS, as shown in Figure 3-1. The minimum configuration applies to an early stage of construction of a commercial network.

Figure 3-1 Minimum configuration of the BSC6810

The maximum capacity of the BSC6810 in minimum configuration is as follows: l 7,200 Erlang traffic volume or 460 Mbit/s (UL + DL) PS throughput l 200 NodeBs l 600 cells



3.3 Maximum Configuration In maximum configuration, the BSC6810 needs two cabinets, that is, one RSR and one RBR, as shown in Figure 3-2. You can add RBSs to expand the system capacity without disrupting the ongoing services.

Figure 3-2 Maximum configuration of the BSC6810

The maximum capacity of the BSC6810 in minimum configuration is as follows:

l 61,200 Erlang traffic volume or 3910 Mbit/s (UL + DL) PS throughput l 1,700 NodeBs l 5,100 cells



4 Operation and Maintenance 4.1 Overview

To ensure convenient and flexible maintenance, the BSC6810 supports local maintenance and remote maintenance. In addition, the BSC6810 supports flexible access modes.

The BSC6810 provides a hardware-independent universal OM mechanism and provides OM functions such as security management, fault management, alarm management, equipment management, and software management.

The Man-Machine Language (MML) and Graphical User Interface (GUI) meet the requirements of different operation environments.

Figure 4-1 shows the OM networking of the BSC6810.



Figure 4-1 OM system of the BSC6810

BAM: Back Administration Module FAM: Front Administration Module LMT: Local Maintenance Terminal IP: Internet Protocol VLAN: Virtual Local Area Network

The LMT is the OM terminal at the NE side. The LMT can be connected to the alarm box, which generates visual and audible alarms. The LMT software uses a GUI and has a built-in MML client. The LMT provides the BSC6810 with various functions, such as security management, configuration management, maintenance management, fault detection, performance management, alarm management, loading management, status monitoring, message tracing, log management, and software management.

4.2 Benefits Diversified OM Access Modes

The BSC6810 supports local maintenance and remote maintenance. Various access modes can be used to meet the OM requirements in different scenarios.

For local maintenance, the BSC6810 supports the following access modes through the LMT:

l Through the port on the panel of the OMUa board l Through the VLAN l Through the Intranet and Internet



For remote maintenance, the BSC6810 supports the following access modes through the iManager M2000:

l Through the VLAN l Through the Intranets and Internet

Powerful Hardware Management Functions for Rapidly Locating and Rectifying Hardware Faults

The BSC6810 provides the precaution mechanism for the hardware fault, thus ensuring that sufficient time is available to rectify the fault in time before the services are disrupted.

The BSC6810 provides functions such as status query, data configuration, and status management of the internal physical devices.

When a hardware fault occurs, the BSC6810 alerts the user by generating alarms and flashing indicators and provides suggestions to guide the user in troubleshooting. The alarm is cleared upon the rectification of the fault.

The BSC6810 provides the functions of isolating the faulty part, such as activating or deactivating the faulty part. When a faulty part needs to be replaced, the hot swapping function enables the rapid power-on of the substitute, thus reducing the time in fault rectification.

Advanced Software Management Functions for Secure and Smooth Upgrade The BSC6810 provides the remote upgrade tool, which enables the operator to upgrade the software at the operation and maintenance center without affecting the ongoing services. The remote upgrade tool provides the function of backing up the crucial data in the system. When the upgrade fails, version rollback is performed immediately and the system returns to normal in a short period.

After the upgrade is complete, version consistency check is performed to ensure the version correctness.

Rich Tracing and Detection Mechanisms for Reliably Monitoring the Network Status

The BSC6810 provides the tracing and detection functions of multiple layers and multiple levels to accurately locate faults. The tracing and detection functions include user tracing, interface tracing, message tracing, fault detection on the physical layer, fault detection on the data link layer, and detection of other faults.

The tracing messages are saved as files, which can be viewed through the review tracing function of the LMT.



5 Technical Specifications 5.1 Technical Specifications 5.1.1 Capacity Specifications

You can expand the capacity of the BSC6810 by adding RBSs or service processing boards. The addition of SPUa boards contributes to the expansion of control plane resources, and the addition of DPUb boards contributes to the expansion of user plane resources.

When adding boards, pay attention to the following:

l In the RSS, a maximum of 10 SPUa boards can be configured in slots 05 and 811. In the RBS, a maximum of 10 SPUa boards can be configured in slots 05 and 811.

l In the RSS, a maximum of 10 DPUb boards can be configured in slots 811 and 1419. In the RBS, a maximum of 12 DPUb boards can be configured in slots 819.

Table 5-1 lists the processing capabilities of SPUa and DPUb boards.

Table 5-1 Processing capability of SPUa and DPUb boards

Board or Subsystem

BHCA Traffic Volume (Erlang)

(UL + DL) PS Throughput (Mbit/s)

SPUa 80k

DPUb 1,800 115

Table 5-2 lists the typical configurations of the BSC6810. You can choose a typical configuration as required.

Table 5-2 Typical configurations of the BSC6810

Number of Subracks



Number of NodeBs

Number of Cells

1 RSS 320k 7,200 460 200 600

1 RSS + 1 RBS

720k 18,000 1,150 500 1,500



Number of Subracks



Number of NodeBs

Number of Cells

1 RSS + 2 RBSs

1,040k 28,800 1,840 800 2,400

1 RSS + 3 RBSs

1,360k 39,600 2,530 1,100 3,300

1 RSS + 4 RBSs

1,680k 50,400 3,220 1,400 4,200

1 RSS + 5 RBSs

2,000k 61,200 3,910 1,700 5,100

For the BSC6810, both the BHCA value and the traffic volume are calculated on the basis of Huawei traffic model.

5.1.2 Structural Specifications Item Specification

Cabinet standard The structural design conforms to the IEC60297 standard and IEEE standard.

Door type l single-door l double-door

Cabinet dimensions

l N68E-22 cabinet: 2,200 mm (height) x 600 mm (width) x 800 mm (depth)

l N68-21-N cabinet: 2,130 mm (height) x 600 mm (width) x 800 mm (depth)

Height of the available space in a cabinet

l N68E-22 cabinet: 46 U l N68-21-N cabinet: 44 U

Cabinet weight l N68E-22 cabinet: 350 kg l N68-21-N cabinet: 410 kg

5.1.3 Clock Specifications Item Specification

Clock precision Meeting the requirements of the standard clock at stratum 3

Clock accuracy 4.6 10-6

Pull-in range 4.6 10-6

Maximum frequency offset 2 10-8/day



Item Specification

Initial maximum frequency offset 1 10-8

5.1.4 Power Consumption Item Sub-Item Specification

Power input 48 V DC Power input

Power range 38 V to 57 V

Power consumption of a subrack

RSS: 1,690W RBS: 1,700 W

Power consumption

Power consumption of a fully configured cabinet

RSR: 5,050 W RBR: 4,900 W

5.1.5 Space Specifications Item Recommended Value Position in

Figure 5-1

Spacing between the cable ladder and the wall

800 mm (1)

Spacing between the side of the cabinet and the cable ladder

200 mm (2)

Spacing between the side of the cabinet and the wall

800 mm (5)

Width of the main aisle 1,000 mm (4)

Spacing between the front (rear) side of the cabinet and the wall

800 mm (3)

Spacing of cabinet front (rear) between two adjacent cabinet rows

1,800 mm (6)



Figure 5-1 Space requirements in the equipment room

l In overhead cabling mode, the distance between the cabinet top and the ceiling of the equipment room cannot be less than 1,000 mm.

l In underfloor cabling mode, the elevation of the ESD floor cannot be less than 200 mm.

5.1.6 Environmental Specifications Specification Item

Storage Environment

Transportation Environment

Operating Environment

Temperature range

40 to +70 40 to +70 Long-term: 0 to 45 Short-term: 5 to +55

Humidity range

10% RH to 100% RH

5% RH to 100% RH

Long-term: 5% RH to 85% RH Short-term: 5% RH to 95% RH

NOTE Short-term operation refers to the operation with the duration not more than 96 hours at a time and with the accumulative duration not more than 15 days a year.



5.1.7 Transmission Ports Transmission Type Connector

E1/T1 DB44

Channelized STM-1/OC-3 LC/PC

FE RJ45

RJ45 GE

LC/PC

5.1.8 Reliability Specifications Item Specification

System availability > 99.999%

System restarting time 10min

Mean Time Between Failures (MTBF) 347,700 hours

Mean Time To Repair (MTTR) 1 hours

5.2 Compliance Standards 5.2.1 Power Supply Standards

Item Standard

Power supply ETS300 132-2

5.2.2 Grounding Standards Item Standard

Grounding ETS300 253

5.2.3 Environment Standards Item Standard

Noise ETS300 753



Item Standard

GR-63-CORE

5.2.4 Safety Standards Item Standard

ETS300 019-2-4-AMD

GR-63-CORE

Shock proofing

YDN5083

IEC60950, EN60950, UL60950

IEC60825-1

IEC60825-2

IEC60825-6

GB4943

Safety

GR-1089-CORE

IEC 61024-1 (1993)

IEC 61312-1 (1995)

IEC 61000-4-5 (1995)

ITU-T K.11 (1993)

ITU-T K.27 (1996)

ITU-T K.41 (1998)

EN 300 386 (2000)

GR-1089-CORE (1999)

YDJ 26-89

GB 50057-94

Surge protection

YD5098-2001

5.2.5 EMC Standards Item Standard

ETSI EN 300 386 V1.3.2 (2003-05) EMC

CISPR 22 (1997)



Item Standard

IEC61000-4-2

IEC61000-4-3

IEC61000-4-4

IEC61000-4-5

IEC61000-4-6

IEC61000-4-29

GB9254-1998

FCC Part 15

NEBS Bellcore GR-1089-CORE issue 2

5.2.6 Environment Standards Item Standard Class

Storage environment ETS300 019-1-1 CLASS 1.2

Transportation environment ETS300 019-1-2 CLASS 2.3

Operating environment ETS300 019-1-3 CLASS 3.1



6 Acronyms and Abbreviations Acronym or Abbreviation Expansion

3GPP Third Generation Partnership Project

ATM Asynchronous Transfer Mode

BHCA Busy Hour Call Attempt

CBC Cell Broadcast Centre

CPU Central Processing Unit

CN Core Network

DSP Digital Signal Processor

FAM Front Administration Module

FE Fast Ethernet

GE Gigabit Ethernet

GUI Graphic User Interface

IP Internet Protocol

LMT Local Maintenance Terminal

MAC Media Access Control

MGW Media Gateway

MML Man Machine Language

MSC Mobile Switching Center

MSP Multiplex Section Protection

MTBF Mean time between failures

OM Operation & Maintenance

RNC Radio Network Controller

RBR RNC Business Rack



Acronym or Abbreviation Expansion

RSR RNC Switch Rack

RBS RNC Business Subrack

RSS RNC Switch Subrack

RRC Radio Resource Control

SDH Synchronous Digital Hierarchy

SGSN Serving GPRS Support Node

SRNS Serving Radio Network Subsystem

UE User Equipment

UMTS Universal Mobile Telecommunications System

VLAN Virtual Local Area Network

WCDMA Wideband Code Division Multiple Access

bsc6810 product description - rnc

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