Huawei BTS3606-1900 Users Manual

Technical Manual Airbridge BTS3606 CDMA Base Station

Chapter 1 Introduction

The mobile communication system has experienced the first generation (analog system) and the second generation (digital system). As one of the main development trends of the second generation, the Code Division Multiple Access 1X (CDMA 1X) technology, advocated by the 3rd Generation Partnership Project 2 (3GPP2), has been widely used for commercial purpose.

The CDMA 1X technology complies with IS -95A and IS -95B standards. The capacity of the CDMA 1X system has increased substantially because it adopts such

technologies as reverse pilot, fast power control and transmit diversity. This chapter first introduces the network solution of Huawei CDMA 1X mobile

communication system, and then the market position of Huawei indoor BTS3606.

System Description

Chapter 1 Introduction

1.1 Network Solution of Huawei CDMA 1X System

The Huawei CDMA 1X mobile communication system comprises the Base Station Subsystem (BSS) and the Core Network (CN). Users can operate and maintain the

system through an integrated mobile network management system. Figure 1-1 shows the network of Huawei CDMA 1X system. This manual aims to

introduce the Base Transceiver Station (BTS) of the BSS, thus, the following figure emphasizes the network structure of BSS.

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Technical Manual

Mobile Network

Airbridge BTS3606 CDMA Base Station

MSMS

ODU

ODUODU

ODU

ODUODU

ODU

ODUODU

ODU

ODUODU

Optical fiber

BTS

BTSBTS

BTS

BTSBTS

BTS3601C/ODU3601C BTS3606 cBTS3612BTS3612A

MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller ODU: Out Door Unit PCF: Packet Control Function BSS: Base Station Subsystem CN: Core Network PLMN: Public Land Mobile Network PSTN: Public Service Telephone Network ISDN: Integrated Service Digital Network

BTS

Management System

BTS

BTSBTS

BTS

BTSBTS

BTS

BTSBTS

BSC/PCF

Abis

A3/A7

Abis

BSC/PCF

BSS CN

A10/A11

A1/A2

Chapter 1 Introduction

Packet Domain

Packet Domain Network Equipment

Network Equipment

Circuit Domain

Circuit Domain Network Equipment

Network Equipment

System Description

Internet

PLMN

PLMNPLMNPLMN

PSTN/ISDN

Figure 1-1 Network structure of Huawei CDMA 1X system

Note:

The appearance of the BTS3601C cabinet is the same as that of the ODU3601C cabinet.

1.1.1 Brief Introduction to BSS

The BSS consists of the BTS, Base Station Controller (BSC), and Packet Control Function (PCF). The PCF is usually integrated with the BSC. The ODU3601C, a soft

site, is also a part of the Huawei BSS.

I. BTS

The BTS transmits and receives radio signals to enable the communication between the radio network system and the Mobile Station (MS). Huawei provides a series of

BTS products, including:

l cBTS3612: Indoor BTS equipment. The maximum capacity of a single cabinet is

4 carriers and 3 sectors or 2 carriers and 6 sectors.

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Technical Manual Airbridge BTS3606 CDMA Base Station

l BTS3606: Indoor BTS equipment developed based on the cBTS3612. The

maximum capacity of a single cabinet is 2 carriers and 3 sectors.

l BTS3612A: Outdoor BTS equipment developed based on the cBTS3612. The

maximum capacity of a single cabinet is 2 carriers and 3 sectors.

l BTS3601C: Outdoor one-carrier BTS equipment. l ODU3601C: Outdoor one-carrier Soft equipment. It shares the baseband

processing resource of its upper-level BTS. It also transmits and receives the radio signal together with the upper -level BTS.

II. BSC/PCF

The BSC performs the following functions:

l BTS control and management l Call connection and disconnection l Mobility management l Power control l Radio resource management l Provision of stable and reliable radio connections for the upper-level services

through soft/hard handoff

System Description

Chapter 1 Introduction

The PCF manages the Radio -Packet (R-P) connection. As radio resources are limited, they should be released when subscribers are not sending or receiving information.

But the Peer -Peer Protocol (PPP) connection must be maintained. The PCF shields the radio mobility from the upper-level services through the handoff

function.

III. MS

The MS is the equipment used by the mobile subscriber. It can originate and receive calls, and communicate with the BSS.

1.1.2 Brief Introduction to CN

The CN comprises the packet domain network and the circuit domain network.

I. Packet domain network equipment

The packet domain network equipment covers :

l Packet Data Service Node (PDSN) l Mobile Internet Protocol Home Agent (MIP HA ) l Authorization, Authentication and Accounting (AAA)

They connect and communicate with the Internet.

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II. Circuit domain network equipment

The circuit domain network equipment includes :

l Mobile Switching Center (MSC) l Home Location Register (HLR) l Gateway Mobile-services Switching Center (GMSC)

They connect and communicate with the conventional Public Land Mobile Network (PLMN) and Public Switched Telephone Network/Integrated Services Digital Network

(PSTN/ISDN).

1.2 Position of BTS3606

The following presents the position of the BTS3606.

I. Position in the network

The BTS3606 is located between the BSC and the MS in the CDMA 1X system. Under the control of the BSC, the BTS3606 is the radio transceiver equipment serving

one cell or multiple logical sectors.

System Description

Chapter 1 Introduction

Connecting with the BSC through the Abis interface, the BTS3606 helps the BSC manage radio resources, radio parameters and interfaces. It also implements, over the Um interface, the radio transmission between the BTS and the MS, as well as related control functions.

II. Position in the application

The indoor BTS3606 supports multi-cell configuration. A single cabinet can supports three sectors, each of which can support at most two

carriers. The indoor BTS3606 has the following features:

l Moderate capacity l Small size l Easy installation l Flexible coverage

The BTS3606 is suitable for the networking in the area with moderate traffic. Complying with IS-95A/B and CDMA 1X, the BTS3606 is compatible with other

CDMA BTS products of Huawei.

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Chapter 2 Product Features

The BTS3606 is designed in consideration of customers' requirements for service, capacity, coverage, transmission, power supply, installation and maintenance. It

adopts integrated design, which shows the customer-oriented service idea of Huawei.

2.1 Technical Features

I. The BTS3606 is designed with advanced architecture for the CDMA 1X

EV-DO.

II. The adoption of the Channel Element (CE) pool improves the availability of

the hardware resources and the error tolerance capability of the system.

Chapter 2 Product Features

System Description

III. The digital intermediate frequency technology enhances the signal

processing capability.

IV. Intelligent control for the fan prolongs the service life and reduces noises.

V. It also supports inband adaptive filtering anti-interference.

VI. The BTS3606 can be cascaded with the ODU3601C to expand the

coverage area of radio network flexibly.

VII. It can support bands of 450 MHz, 800 MHz , and 1900 MHz .

2.2 Large-scale Coverage

The BTS3606 can cover a wide area thanks to its excellent performance of transceiving.

I. Receiving sensitivity

The main/diversity receiving technology is employed to optimize the receiving performance. Upon RC3, the receiving sensitivity of the BTS3606 is better than -127 dBm.

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II. Transmit power (mea sured value at the antenna port of the cabinet)

The maximum average transmit power is 25 W. After the high-power combiner is configured, the maximum average transmit power

can reach 50 W.

III. ODU3601C cascading

When the BTS3606 is cascaded with the ODU3601C through optical fibers, the coverage area of the signals can be effectively spread.

2.3 Flexible Networking Mode

I. Networking interfaces

The BTS3606 supports the networking by using E1 and T1 links, and the interfaces of Inverse Multiplexing for ATM (IMA) and User Network Interface (UNI). The

multiplexing rate on the Abis interface is greatly increased.

Chapter 2 Product Features

System Description

II. Networking modes

The BTS3606 supports networking modes in chain, star, and tree topologies. It can share the transmission network with the GSM BTS. In addition, it provides the

GSM BTS with transmission channels on the Abis interface in the ATM over Fractional E1/T1 mode.

III. Clock source

The BTS3606 supports the following clock sources:

l Global Position System (GPS) clock l Global Navigation Satellite System (GLONASS) clock l Other external clock sources

Thus, it can adapt to various networking situations If the BTS High Precision Clock Module (HPCM) is configured, the BTS3606 can still

keep clock synchronization for 24 hours when the external clock source signal is lost.

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2.4 Convenient Operation and Maintenance

Users can operate and maintain the BTS3606 through the Local Maintenance Terminal (LMT) and the M2000 integrated maintenance console.

The following lists the maintenance functions:

I. System status monitoring

This function provides the indication for the system running status and resource status, the configuration of local cell and logical cell, and their status indication.

II. Data configuration

The BTS3606 adopts dynamic data configuration mode. The configured data takes effect without resetting BTS.

It also supports the batch processing of data configuration, which allows the configuration of multiple network elements sharing the same attributes at a time.

Chapter 2 Product Features

System Description

The data backup function is also available.

III. Alarm processing

This function covers:

l Alarm collection l Alarm clearing l Alarm querying l Alarm shielding l Alarm filtering

IV. Security management

The security management function includes :

l User login authentication l Command authority restriction l Confirmation of crucial operation l User gro up management l Timeout locking

V. Test

The BTS3606 supports offline and online tests. The test items include:

l Board loopback test l Self-test

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l Trunk loopback test

VI. Site monitoring

Data transmission channels are available for the monitoring equipment in the equipment room to facilitate attendance-free and centralized monitoring of the

BTS3606.

VII. Upgrade

Users can upgrade the system through remote loading. The upgrade process is retrievable, that is, the system can fall back to the original one when the upgrade fails.

Auto loading function is provided. When a board needs replacing, if the version of the new board is later than that of the old one, auto loading function can be used to

upgrade the software for the new board.

VIII. Equipment operation

Chapter 2 Product Features

System Description

The BTS3606 supports front operation, and online insertion and removal of baseband boards. This facilitates the maintenance, upgrade and expansion of the system.

IX. Auto restart function

When the BTS3606 is out of service owing to power failure or transmission faults, it can restart automatically right after the faults are cleared.

X. Reverse maintenance function

With the reverse maintenance function, users can, from the LMT, log in to the BAM through the network port on the BCKM to perform operation, maintenance and

management over the whole BSS.

2.5 Easy Upgrade and Expansion

I. Compatibility design

The BTS3606 is compatible with IS-95A/B and CDMA 1X. It can be upgraded to CDMA 1xEV-DO smoothly. Huawei BTS3606 saves the operators ' investment when the network is upgraded from IS-95 to CDMA 1X, or from CDMA 1X to CDMA

1xEV-DO.

II. Flexible configuration

The BTS3606 supports the configuration of omni cell or three sectors.

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It can be cascaded with ODU3601C. The BTS3606 can realize flexible coverage through multi -cell configuration.

III. Smooth expansion

The modular structure allows the BTS3606 to be expanded simply by adding modules.

2.6 Serial Products for Seamless Coverage

Huawei provides a series of BTS products to enable a seamless coverage for urban and rural areas, suburbs, and highway and hot areas.

Table 2-1 shows the application of various BTS products.

Table 2-1 Application comparison among serial BTS products

Max. sector

Model

carrier per

cabinet

Capacity Application Type

Chapter 2 Product Features

System Description

cBTS3612 12 Large

BTS3606 6 Medium

BTS3612A 6 Medium

BTS3601C 1 Small

ODU3601C 1 Small

Highly populated area and city.

Medium and small cities, towns. Low requirement for equipment room.

Heavy traffic and limited equipment room space

Indoor, underground, highway and railroad.

Indoor

Outdoor

Outdoor (also applicable to the indoor condition)

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Technical Manual Airbridge BTS3606 CDMA Base Station

Chapter 3 Product Architecture

3.1 Appearance and Configuration

3.1.1 Cabinet Appearance

I. Appearance

The BTS3606 cabinet is designed in conformity to the IEC297 standard. The outer dimensions are 1400 mm % 600 mm % 650 mm (Height % Width % Depth). Figure 3-1 shows the BTS3606 cabinet.

Chapter 3 Product Architecture

System Description

Figure 3-1 BTS3606 cabinet

II. Feature

The BTS3606 cabinet has the following features:

l Light weight owing to its aluminum alloy materials l Excellent electrical conductivity and shielding effect l Good ventilation effect owing to its reasonable design of air ducts l Easy installation and maintenance l Nice appearance

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