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ZXWR RNC Product Description


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ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. I


Version Date Author Approved By Remarks

V1.00 2008-03-18 Not open to the Third Party

V3.30 2008-08-15ZhuXianghua

Update according to RNCV3.07.300

V3.60 2009-5-22 Chen Feng Update according to RNC U9.1

V3.70 2009-9-9 XuYi Update according to RNC U9.2

© 2009 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to bedisclosed or used without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this documentis subjected to change without notice.


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II © 2009 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary

TABLE OF CONTENTS

1

Overview ..................................................................................................................... 1

2

Highlight Features ...................................................................................................... 2

2.1

Large Capacity and High Expandability ....................................................................... 2

2.2

IP Architecture Design, High Efficiency ....................................................................... 2

2.3

High reliability .............................................................................................................. 2

2.4

Outstanding radio resource management ................................................................... 2

2.5

Abundant Interfaces and Flexible Networking ............................................................. 3

3

System Architecture .................................................................................................. 4

3.1

Product Physical Structure .......................................................................................... 4

3.2

Hardware Architecture ................................................................................................. 5

3.2.1

RPU ............................................................................................................................. 5

3.2.2

RAU ............................................................................................................................. 5 3.2.3

RSU ............................................................................................................................. 7

3.2.4

ROMU .......................................................................................................................... 8

3.2.5

RPMU .......................................................................................................................... 8

4

Reliability Design ....................................................................................................... 9

4.1

Hardware Redundancy Design .................................................................................... 9

4.2

Software Reliability Design .......................................................................................... 9

5

Technical Specifications ......................................................................................... 10

5.1

Technical Indices ....................................................................................................... 10

5.2

Interface Indices ........................................................................................................ 10

5.3

Clock Indices ............................................................................................................. 11

5.4

Reliability Indices ....................................................................................................... 11

5.5 Electromagnetic Compatibility Indices ....................................................................... 12 5.6

Weight and Dimensions ............................................................................................. 12

5.7

Power Supply ............................................................................................................. 12

5.8

Environment ............................................................................................................... 12

5.9

Security Indices ......................................................................................................... 13

6

Installation ................................................................................................................ 15


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ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. III

FIGURES

Figure 1

RNC in WCDMA system ................................................................................................ 1

Figure 2

ZXWR RNC Figuration................................................................................................... 4

Figure 3

ZXWR RNC Rack Architecture ...................................................................................... 5

Figure 4

RNC Logical Units .......................................................................................................... 5

Figure 5

Hardware Installation Flow .......................................................................................... 15

TABLES

Table 1

RNC technical indices .................................................................................................. 10

Table 2

RNC technical indices .................................................................................................. 10

Table 3

RNC clock indices ........................................................................................................ 11

Table 4

RNC Reliability ............................................................................................................. 11

Table 5

Anti-Interference of Electromagnetic EMC Indices ...................................................... 12

Table 6

Weight and Dimensions ............................................................................................... 12

Table 7

power supply ................................................................................................................ 12

Table 8

RNC Environment Indices ........................................................................................... 12

Table 9

The General Terminologies and Definitions ................................................................ 17


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ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. 1

1 Overview

In general, WCDMA system is consisting of Core Network (CN), UMTS Terrestrial Radio Access Network (UTRAN) and User Equipment (UE). UTRAN has two network elements:Node B and RNC. Iub is defined as the interface between RNC and Node B. Fig 1shows the position of RNC in WCDMA system.

Figure 1 RNC in WCDMA system

RNC connects other equipments via the following interfaces:

Iub interface to Node B

Iu-CS interface to MSC/MSC Server

Iu-PS interface to SGSN

Iur interface to other RNC

The main functionalities of RNC include:

System information broadcast and UE access control

Mobility management, such as handover etc.

Radio Resource Management such as power control, cell resource allocation etc.

Access bearer service of CS domain and PS domain


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2 © 2009 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary

Encryption and decryption for signaling and data

ZTE RNC product, named ZXWR RNC (hereinafter refer to “RNC”), is based on 3GPPFDD R7, being compatible with other network elements and UE based on

R99/R4/R5/R6/R7. At the same time, ZXWR RNC provides series standard interfacesincluding Iu, Iub, Iur etc, supporting to connect with other venders ‟ equipments such asCN, RNC etc.

2 Highlight Features

The ZXWR products always aim at saving customer‟s investment in 3G products byoffering a large capacity and linear expandable system once and for all. This facilitateshigh density 3G services. The RNC adopts distributing design, separates control planefrom user plane, interface from application, supports ATM protocol stack, it also supportsall IP UTRAN. The RNC system has the following features:

2.1 Large Capacity and High Expandability

The RNC is designed to adapt service increment and various traffic environments. Itprovides a large capacity and is easy to be expanded. The data throughput is up to 9.6Gbps and maximum traffic is 76800Erl. The control plane and the user plane of the RNCare in distributed mode so there is no bottleneck for centralized processing in the entiresystem. The processing resources of control plane and user plane are linear expandableaccording to the capacity increment requirement.

2.2 IP Architecture Design, High Efficiency

Base on the all IP switching platform, data transmission is high efficient and flexible. Thehigh performance packet data management platform ensures the system non-blockingdata transaction capability. Comparing with ATM-based platform, it features convenientmaintenance and configuration, flexible expandability, higher transmission efficiency,and agile transmission mechanism, which can meets the future requirements ofincreasing mobile data services.

2.3 High reliability

The RNC has high reliability and stability. The system is based on redundancy design.So there is no single point of failure. The system supports online software download andthere is no need to reboot after version upgrade.

2.4 Outstanding radio resource management

ZTE owns dozens of patents on radio resource management of the RNC. It supportsautomatic optimization of radio parameters and can intelligently allocate and scheduleradio resource priorities according to network load situation and QoS level.


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2.5 Abundant Interfaces and Flexible Networking

RNC supports ATM/IP dual protocol stack, it supports all kind of physical interfaces suchas E1/T1, E3/T3, STM-1, POS, channelized STM-1, FE and GE etc. At different phases,RNC can flexibly network according to different conditions, and has realized IP UTRAN.


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3 System Architecture

3.1 Product Physical Structure

The RNC system is built in a standard 19-inch cabinet, and the dimension of height*width* depth is 2000* 600* 800 (mm). The rack of RNC system and architecture areshown as the following figures.

Figure 2 ZXWR RNC Figuration


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Figure 3 ZXWR RNC Rack Architecture

3.2 Hardware Architecture

RNC hardware logical units are shown as:

Figure 4 RNC Logical Units

3.2.1 RPU

The RPU (RNC Processing Unit) processes control plane signaling and user planeinformation, including RCB (RNC control board) and RUB (RNC user board) boards.

3.2.1.1 RCB

RCB accomplishes the control protocol processing of RNC, such as RANAP, NBAP,RNSAP, RRC, SABP etc.

3.2.1.2 RUB

RUB (RNC User Plane Processing Board) is a user plane processing board of RNC,dealing with the user plane protocols. RUB deals with the radio user plane protocols,including CS service FP/MAC/RLC/IuUP/RTP/RTCP protocol stack and PS serviceFP/MAC/RLC/PDCP/IuUP, GTP-U protocols.

3.2.2 RAU

RAU (RNC Access Unit) provides the interface access function for Iu, Iub and Iur of RNC.RAU is configured with the following boards:

DTA: Digital Trunk board with ATM

DTI: Digital Trunk board with IP


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SDTA2: Sonet Digital Trunk board with ATM, 2nd

Generation

SDTI: Sonet Digital Trunk board with ATM

APBE: ATM Process Board Enhanced

POSI: POS Interface board

GIPI3: Gigabit IP Interface board, 3rd

Generation

3.2.2.1 DTA

DTA is used to provide ATM over E1/T1 interfaces

DTA provides 32*E1/T1 electrical interfaces and supports 30 IMA groups.

3.2.2.2 DTI

DTI is used to provide IP over E1/T1 interfaces

DTI supports 32*E1/T1 electrical interfaces, and supports 32 MLPPP groups.

3.2.2.3 SDTA2

SDTA2 is used to provide channelized STM-1 interfaces and IMA protocol processing.

SDTA2 provides 4 channelized STM-1 optical interfaces, and supports 168 IMA groups.

3.2.2.4 SDTI

SDTI is used to provide channelized STM-1 interfaces and MLPPP protocol processing.

SDTI provides 2 channelized STM-1 optical interfaces, and supports 64 MLPPP groups.

3.2.2.5 APBE

APBE is for the processing of ATM access over STM-1, and implements SARfunctionality of AAL2 and AAL5.

APBE provides 4 STM-1 optical interfaces.

3.2.2.6 POSI

POSI is for the processing of IP access over STM-1/STM-4.

POSI provides 4 STM-1 or 2 STM-4 optical interfaces.


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3.2.2.7 GIPI3

GIPI3 provides FE/GE interfaces.

GIPI3 provides 2*GE optical interface/ electrical interfaces, or 4* FE electrical interfaces.

3.2.3 RSU

The RSU (RNC Switch Unit) provides a large-capacity and non-blocking IP switchingunit for system control management, communication between service processing boardsand traffic connection among multiple RAUs.

It is constructed with:

PSN: Packet Switch Network

GLI: Gigabit Line Interface

UIMC: Universal Interface Module of Control

GUIM: GE Universal Interface Module

THUB: Trunk HUB

3.2.3.1 PSN

PSN is the system switching board of RNC. It accomplishes kernel switching function ofRSU, implements the packet data switching of each GLI.

PSN supports up to 40Gbps switching capability.

3.2.3.2 GLI

GLI is the access switching board, which implements RPU/RAU access to RSU,including the physical layer adaptation, IP package checklist, segment, forwarding andtraffic management etc, and it converges the data from RPU/RAU to PSN for switching.

3.2.3.3 UIMC

UIMC is a type of switching board of RNC, belonging to RSU. It accomplished switching

function among control plane processing boards, and clock distribution. Informationswitching of UIMC boards in different shelves is implemented by THUB.

3.2.3.4 GUIM

GUIM is for the switching functionality of user plane processing boards. Informationswitching of GUIM boards in different shelves is implemented by GLI and PSN.


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3.2.3.5 THUB

THUB is for control plane data switching among different shelves. It supports 400Mbpsswitching capability.

3.2.4 ROMU

The ROMU (RNC Operation and maintenance unit) is responsible for the generalprocessing and implementing O&M control (including O&M agent) of the entire systemas well as system clock supply and external synchronization.

It includes:

ROMB: RNC Operating & Maintenance Board

CLKG: Clock Generator

SBCX: X86 Single Board Computer

3.2.4.1 ROMB

ROMB as RNC O&M agent is used to monitor and manage all of the boards in thesystem, and to implement the general processing of the system and route protocolmanagement.

3.2.4.2 CLKG

CLKG board is responsible for the clock supply and external synchronization. CLKGboard gets clock reference from BITS, GPS receiver or the circuit. After synchronization,the signal is used at every interface shelf.

The default configuration of CLKG doesn‟t include GPS module. GPS module should beadded in CLKG if GPS clock or GPS location service is required.

3.2.4.3 SBCX

SBCX provides the operation and maintenance management agent functionality.

3.2.5 RPMU

RPMU (RNC Peripheral Monitor Unit) belongs to ROMU. It provides monitoring functionto peripheral equipments, and collects information of all boards, alarms while the systemhas faults. It includes:

PWRD: Power Distributor

ALB: Alarm Box


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3.2.5.1 PWRD

PWRD is not only responsible for -48V power provision for all shelves and fans in therack, but also for the collecting peripheral and circumstance information, including the

PWRD and fan‟s status, temperature, smoke, water and infrared alarming.

PWRD reports the detected information to ROMB via RS485 interface.

3.2.5.2 ALB

Alarm box will obtain the alarm information from OMM, and send the different levelalarms according to different fault situations of the system in order to be managed andintervened in time by the equipment management personnel.

ALB provides several alarm methods including SMS, LCD display, file transfer, voicealarm etc.

4 Reliability Design

4.1 Hardware Redundancy Design

In order to ensure reliability, RNC rack and shelves adopt dual-power-supply, and theconnection cables in RNC rack are at least dual-mode. At the same time, RNC provides1+1 backup for the key boards such as: ROMB, CLKG, RCB, UIMC, GIMU, CHUB, PSN,GLI, and RUB adopts load-sharing method, which is named redundancy resource pool.

And each of the interface boards adopt 1+1 backup or load-sharing. The entire systemperformance will not be affected if individual board has fault.

4.2 Software Reliability Design

RNC software subsystem adopts high reliability design. Besides the external operationand maintenance ports, which are protected by internal firewall software, RNC internalcommunication in whole system is entirely isolated. So RNC can detect and defendagainst the network security attacks. At the same time, the OMM subsystem supportspowerful user authentication functionality; the idea is that system will distribute relevantoperation permission according to user name and password.

RNC software system has powerful self-fault-tolerant capability, mainly reflected in:

Automatically checking the legitimacy of data configured by user, refusing wrong or

unreasonable data configuration and informing user to modify

Supporting key version and data backup, and performing rollback when version or

data loading failed

Supporting “watch dog” functionality, resetting the boards when software going

wrong and recording the failure information by black box function

Detecting the failure of ports, link and SW/HW, resetting/triggering backup unit to

guarantee system running normally


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5 Technical Specifications

5.1 Technical Indices

Table 1 RNC technical indices

Item Indices

Processing capability 76800 Erl

Data throughput

( Two-way data flow )9.6Gbps

Maximum Quantity of Nodes B 1960

Maximum Quantity of cells 5880

BHCA 7000K

5.2 Interface Indices

Table 2 RNC technical indices

Transmission type

StandardInterfaceboard

PortInterface

Remark

E1/T1ITU-TG.703/G.704

DTA DB68 Provide 32* E1/T1 for Iub ATMtransmission

DTI DB68Provide 32* E1/T1 for Iub IPtransmission

Channeliz

ed STM-

1/OC-3

ITU-T G.957

ITU-T I.432.1

ITU-T I.432.2

SDTA2 LC/PCProvide 4* channelized STM-1/OC-3 optical interfaces for Iub ATM transmission

SDTI LC/PCProvide 2* channelized STM-1/OC-3 optical interfaces for IubIP transmission

STM-1/OC-

3c

ITU-T G.957

ITU-T I.432.1ITU-T I.432.2

APBE LC/PCProvide 4* STM-1/OC-3 opticalinterfaces for Iub/Iu/Iur ATMtransmission

POSI LC/PCProvide 4* STM-1/OC-3 opticalinterfaces( or 2*STM-4/OC-12c)for Iub/Iu/Iur IP transmission

FE IEEE 802.3

GIPI3configuredwith FEelectricalinterface

RJ45Provide 4* FE for Iub/Iu/Iur IPtransmission

GE IEEE 802.3

GIPI3configuredwith GEelectricalinterface

RJ45Provide 2* GE electrical interfacefor Iub/Iu/Iur IP transmission


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Transmission type

StandardInterfaceboard

PortInterface

Remark

GIPI3configured

with GEopticalinterface

LC/PC Provide 2* GE optical interface forIub/Iu/Iur IP transmission

5.3 Clock Indices

Table 3 RNC clock indices

Item Indices

Synchronization level Level 2 class A

Clock working mode: Fast capture, tracking, holdover and free-run

Clock synchronous link

interface

1) Incoming signal jitter and wander: 1.5UI (0.02

kHz –2.4 kHz)

2) Outgoing signal jitter and wander: 1.5UI (0.02

kHz –10 kHz)

0.2 UI (18 kHz –100 kHz)

Each clock board supports 7 clock resource, including: 4 clock in equipment room(2MHZ or 2Mbit), 2 line clock (8KHZ, acquired from Iu interface) and 1 * GPS clock. Oneof the 7 clock resource will be specified as the working clock source via softwareconfiguration, the rest clocks for standby.

When all the 7 clock sources are missing, clock board can work under free oscillation,which is used by RNC.

No matter it is acquired from clock source or under free oscillation, RNC can provide itsown clock to NodeB.

5.4 Reliability Indices

In ZXWR RNC, the algorithm of system reliability is based on the GJB/Z299B ElectronicEquipment Reliability Estimation Manual and MIL-HDBK-217F Electronic EquipmentReliability Estimation

Table 4 RNC Reliability

Item Indices

MTBF ≥240000 hours

MTTR 0.5 hour

Availability 99.999792%

Downtime ≤1.09 minutes/year


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5.5 Electromagnetic Compatibility Indices

Table 5 Anti-Interference of Electromagnetic EMC Indices

Item Standard

Static Discharge ImmunityContact Discharge: ±6000V

Air Discharge: ±8000V

Surge Impact Immunity DC Power port Line(Ground): ±2000V

5.6 Weight and Dimensions

Table 6 Weight and Dimensions

Item Standard

Requirements of Equipment Site 350kg/m2

Dimensions2000 mm x 600 mm x 800 mm (Height x Widthx Depth)

5.7 Power Supply

Table 7 power supply

Item Standard

Power input -48V DC

Allowable fluctuation range -57 VDC to –40 VDC

Maximum Power Consumption per

rack3700W

5.8 Environment

Table 8 RNC Environment Indices

Item Indices

Equipmentenvironment

TemperatureLong-term operation: 0℃ ~ +40℃

Short-term operation: -5℃ ~ +45℃

HumidityLong-term operation: 20%~90%

Short-term operation: 5%~95%

Noise

When the system is in the full power output andthe working temperature is 43°C ± 2°C, thenoise power level is less than 6.5 Bels (aprox.65dB).


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Requirements ofEquipment Site

250kg/m2

Atmosphericpressure

70 kPa –106 kPa

Storageenvironment

It should be packed and stored indoors.

Temperature: -45°C~+70°C.

Relative humidity: 5%~98%; free of condensation.

TransportEnvironment

Transport environment:

2K4P/2B2/2C3/2S3/2M3

Sustainable transport time: 30 days

Intact package

Mechanical Adaptability

ETSI 300019-1-4 ClassM4.1

5.9 Security Indices

Optical Interface Protection

The optical interface design and optical module chosen are according to therequirements of BS EN 60825-2-2000.

Rack‟s Stability

The layout of the rack shall maintain the overall symmetry. Under the premise to ensurethe performance indices and thermal design requirements, the gravity center shall be

lowered as much as possible to improve the overall stability. In normal conditions, theequipment shall not be inverted on a 10 degrees tilt platform. The shell of the equipmentmust be able to resist some external percussion. The case, shelves, and shell must befixed reliably, without the tendency to scatter.

Rack Protection Grade

Security protection grade is IP20 („2‟indicates that prevents the object which is biggerthan 12mm such as finger to insert into. And „0‟ indicates that has no special waterprotection)

Steel Ball Test

Such test can be done by using the integrity rack shell of sample or the other biggestarea of not enhanced part: one 500g steel ball will free fall from 1.3m height to hit the upsurface of the equipment, the case has no clearly indent. Or the 500g steel ball with1.3m line as a horizontal pendulum to hit the beside surface of the equipment, if there isindent damage or scratch, but it does not affect security, water resistant, and it alsocan endure corresponding anti- electric strength, this test is passed.

Lightning Protection

The system provides lightning protection measures. The working ground and theprotection ground are reliable with the grounding resistance of the protection ground lessthan 1 ohm. The protection grounding terminals are anti-corrosive; the insulating layer of


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the grounding conductor is yellow-green. There is tooth-shape washer for the connectionbetween the protection ground and the screw of shell (or PCB) to make the protectiongroup more reliable and stable.

Current leakage

Current leakage of the overall system:


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6 Installation

Figure 5 shows the installation flow of ZXWR RNC hardware.

Installing cabinet

Installing boards

Start

Installing cbles

Installing GPS antenna

feeder system

Installing

accessories

Checking theinstallation

Powering on/off the

equipment

End

Figure 5 Hardware Installation Flow

The workload of the hardware installation is large and complex. It can fall into thefollowing parts:

1 Installing cabinet

ZXWR RNC adopts 19-inch standard cabinet. The cabinet installation includes baseinstallation mode and feet installation mode. In the case of multi-cabinet, fix a singlecabinet first and then connect the cabinets.

2 Installing boards


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Usually, the shelf is installed inside the rack before delivery. The users are only requiredto install boards and other accessories on the site.

3 Installing cables

After installing the cabinet, cables are required to install, including cabinet power cable,cabinet grounding cable, intra-cabinet line, out-of-cabinet line, and inter-cabinet line.

4 Installing GPS antenna feeder system

GPS serves as the clock and frequency reference of WCDMA, playing a very importantrole. In addition, it provides the system with GPS ephemeris signals for AGPS location.GPS antenna receives the navigation location signals from the GPS satellite, modulatinginto the frequency, clock signals and AGPS messages via the GPS signal receiver. Theclock signals are provided to WCDMA units and AGPS messages are sent to theprocessing unit.

5 Installing accessories

After installing the cabinet, accessories related to RNC operation are required to install,including the alarm box and all kinds of sensors.

6 Checking the installation

Check the installation of ZXWR RNC hardware completely after it ends. The checkincludes the cabinet installation techniques, cable connection and layout, auxiliarydevice and related items.

7 Powering on/off the equipment

After checking the installation, please power on/off the equipment for check.


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Acronyms and Abbreviations

The general terminologies and definitions of this product are listed in the following table.

Table 9 The General Terminologies and Definitions

Item Explanation

IuInterconnection point between an RNC and a Core Network. It is alsoconsidered as a reference point.

Iub Interface between an RNC and a Node B.

Iur A logical interface between two RNC. Whilst logically representing apoint to point link between RNC, the physical realization may not be apoint to point link.

Uu The Radio interface between UTRAN and the User Equipment.

Node B A logical node responsible for radio transmission / reception in one ormore cells to/from the User Equipment. Terminates the Iub interfacetowards the RNC.

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