Huawei Airbridge cBTS3612-1900 User Manual Download Page 38

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User Manual
Airbridge cBTS3612 CDMA Base Station

System Description

1 System Overview

1-21

IV. Board level reliability design

Many measures have been taken to improve the board reliability. Moreover, the

system reliability is improved through the redundancy design of key parts.

Key circuits are designed by Huawei, which lays the foundation of high

reliability.

The hardware WATCHDOG is equipped for the board, and the board can

automatically reset in case of fault.

The board is provided with the functions of over-current and over-voltage

protection and the function of temperature detection.

The board also provides emergency serial port, and can keep contact with the

main control board in case of emergency.

Strict thermal analysis and simulation tests are conducted during the design of

boards for the purpose of ensuring longtime operation.

The board software and important data is stored in the non-volatile memory, so

that the board can be restarted when the software upgrading fails.

V. Overvoltage and overcurrent protection

The BTS system provides various means of over-voltage and over-current

protection.

Over-voltage and over-current hardware protection is provided for the DC/DC

power supply module.

For secondary power supply to boards, slow-start is employed to prevent the

great impact on the whole power supply load when the boards are powered on.

Fuse is installed for each board against over-current.

For E1 interface circuit, serial-port circuit and network interface circuit,

protection measures are taken in accordance with the corresponding design

specifications of Huawei.

VI. Power supply reliability

The reliability of power supply is improved by means of over-current and

over-voltage protection, internal temperature adjustment, and redundancy backup.

VII. Fault detection, location and removal

The BTS system is equipped with the functions of self-detection and fault diagnosis

that can record and output various fault information. The common software and

hardware faults can be corrected automatically.

The hardware fault detection functions include fault locating, isolating and automatic

switchover. The maintenance engineers can identify the faulty boards easily with the

help of the maintenance console.

Summary of Contents for Airbridge cBTS3612-1900

Page 1: ...HUAWEI Airbridge cBTS3612 CDMA Base Station User Manual System Description ...

Page 2: ...HUAWEI Airbridge cBTS3612 CDMA Base Station User Manual Local Maintenance Terminal ...

Page 3: ...HUAWEI Airbridge cBTS3612 CDMA Base Station User Manual BTS Maintenance ...

Page 4: ...1 5cm 7cm Font Arial 22pt Product name Bold 5 3cm 0 7cm Airbridge cBTS3612 CDMA Base Station User Manual 5cm HUAWEI 4cm Ver T2 030160 20030125 C 1 21 BOM 31013260 2 5cm Font Arial 9 pt ...

Page 5: ...Huawei Technologies Co Ltd Administration Building Huawei Technologies Co Ltd Bantian Longgang District Shenzhen P R China Postal Code 518129 Website http www huawei com BOM 31013260 ...

Page 6: ... cBTS3612 CDMA Base Station User Manual Airbridge cBTS3612 CDMA Base Station User Manual Airbridge cBTS3612 CDMA Base Station User Manual 15 7cm Huawei Technologies Co Ltd Huawei Technologies Co Ltd Huawei Technologies Co Ltd Huawei Technologies Co Ltd 1 0 c m ...

Page 7: ...1 16K Cover for hectograph Font Arial 22 pt Product name Bold Airbridge cBTS3612 CDMA Base Station User Manual ...

Page 8: ...HUAWEI 1 System Description 2 Local Maintenance Terminal 3 BTS Maintenance Airbridge cBTS3612 CDMA Base Station User Manual V100R002 ...

Page 9: ...ovides customers with comprehensive technical support and service Please feel free to contact our local office customer care center or company headquarters Huawei Technologies Co Ltd Address Administration Building Huawei Technologies Co Ltd Bantian Longgang District Shenzhen P R China Postal Code 518129 Website http www huawei com Email support huawei com ...

Page 10: ...00 M1800 TELESIGHT Quidview Musa Airbridge Tellwin Inmedia VRP DOPRA iTELLIN HUAWEI OptiX C C08 iNET NETENGINE OptiX SoftX iSite U SYS iMUSE OpenEye Lansway SmartAX are trademarks of Huawei Technologies Co Ltd Notice 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 statemen...

Page 11: ...configurations and performance indices of cBTS3612 z Module 2 Local Maintenance Terminal This module introduces how to use the cBTS3612 local maintenance terminal First is the guide to the local maintenance terminal second is the detailed introduction of the local commands including configuration commands and maintenance commands z Module 3 BTS Maintenance This module introduces how to maintain th...

Page 12: ...ds are grouped in braces and separated by vertical bars One is selected x y Optional alternative keywords are grouped in square brackets and separated by vertical bars One or none is selected x y Alternative keywords are grouped in braces and separated by vertical bars A minimum of one and maximum of all can be selected x y Optional alternative keywords are grouped in square brackets and separated...

Page 13: ... Menu1 Menu2 Menu3 Multi level menu options e g System Option Color setup on the main menu indicates Color Setup on the menu option of Option which is on the menu option of System V Mouse operation Action Description Click Press the left button or right button quickly left button by default Double Click Press the left button twice continuously and quickly Drag Press and hold the left button and dr...

Page 14: ... 4 OML Interface 1 18 1 4 5 LMF Interface 1 18 1 4 6 System Synchronization Interface 1 18 1 4 7 BTS Test Interface 1 18 1 4 8 Remote Maintenance Serial Port 1 19 1 4 9 Environment Alarm Interface 1 19 1 5 Reliability Design 1 19 1 5 1 Hardware Reliability Design 1 20 1 5 2 Software Reliability Measures 1 23 2 Hardware Architecture 2 1 2 1 Overview 2 1 2 2 Baseband Subsystem 2 5 2 2 1 Overview 2 5...

Page 15: ...ower Supply Monitoring 2 54 2 5 5 BTS Direct Current Switchbox BDCS 2 55 2 6 Environment Monitoring 2 55 2 6 1 Alarm Box Input 2 56 2 6 2 Alarm Indicator 2 56 2 6 3 Interface for Actuators 2 57 2 6 4 Communication 2 57 2 7 Lightning Protection System 2 57 2 7 1 Overview 2 57 2 7 2 Lightning Protection for DC 2 59 2 7 3 Lightning Protection for Trunk Line 2 60 2 7 4 Lightning Protection for Antenna...

Page 16: ...nctions 4 29 5 System Configuration 5 1 5 1 Overview 5 1 5 1 1 Basic Extended Cabinet Configuration 5 1 5 1 2 Baseband Subrack Configuration 5 4 5 1 3 Power Supply Subrack Configuration 5 6 5 1 4 RF Modules Configuration 5 6 5 1 5 Configuration of Antenna Parts 5 7 5 2 Typical Configurations 5 8 5 2 1 Typical Configuration of cBTS3612 for 450MHz Band 5 8 5 2 2 Typical Configuration of cBTS3612 for...

Page 17: ...s C 1 C 3 Illumination C 2 C 4 Atmospheric Condition C 2 Appendix D Electromagnetic Radiation D 1 D 1 Introduction D 1 D 2 Maximum Permissible Exposure MPE D 1 D 3 Estimation of Exposure to Electromagnetic Fields D 3 D 4 Calculation of Safe Distance D 3 D 5 Location of Base Station Antennas D 4 D 5 1 Exclusion Zones D 4 D 5 2 Guidelines on Arranging Antenna Locations D 4 Appendix E Standard Compli...

Page 18: ...acket domain interworks with Internet and that of the circuit domain interworks with the conventional PLMN and PSTN ISDN The system s operation and maintenance is implemented via the integrated mobile network management system iManager M2000 The position of BTS in CDMA system is as shown in Figure 1 1 Internet PSTN ISDN PLMN A3 A7 A1 A2 A10 A11 Abis A 1 A 2 MS Mobile Network Management System Soft...

Page 19: ...ace management It also implements via the Um interface the radio transmission between the BTS and the MS as well as related control functions cBTS3612 cabinet is shown in Figure 1 2 RF subrack CDU RLDU subrack Fan subrack Baseband subrack RF subrack Power subrack Figure 1 2 cBTS3612 cabinet cBTS3612 has the following functions I Interface function l Um interface supports IS2000 Release A It is ful...

Page 20: ...es cBTS3612 features large capacity high integration and low power consumption One cabinet can accommodate as many as 12 sector carriers It can satisfy the customer s demands on capacity configuration installation power supply transmission and service It s a typical All In One BTS Its features are highlighted as follows 1 2 1 Advanced Technology and Excellent Performance cBTS3612 integrates the fo...

Page 21: ...ed data service Its excellent inheritance capability guarantees the original antenna and feeder components can be used in the event of BTS expansion or upgrade The components include DU RLDU antenna feeder and the optional TMA The TMA only applies to 19000MHz band The DU includes CDU DFU and DDU the difference between these 3 DUs will be introduced in 2 3 RF Subsystem 1 2 3 Convenient Operation an...

Page 22: ...ations II Supporting multiple BTS networking modes such as chain star and tree Refer to 4 1 Transmission Networking for details III Soft BTS networking the SoftSite will be available in the coming version In this networking mode the baseband unit adopts the centralized processing mode The baseband signals and maintenance information are transferred through the fiber to the SoftSite ODU3601C The So...

Page 23: ...Band Band Class 5 450 MHz Band To support the different band classes RF modules with different specifications should be configured in cBTS3612 base station 1 3 Technical Index I Structure and environment indices Cabinet dimensions Top set excluded 1800mm x 800mm x 650mm H x W x D Power supply 48V DC 40 60V DC Operational environment Temperature 5 C 50 C Relative humidity 5 90 Equipment room noise ...

Page 24: ...te configuration Power consumption W Cabinet weight kg S 1 1 1 1500 351 S 2 2 2 2800 388 S 4 4 4 5500 550 V Transmitter indices l 450MHz Band Working band 460 470MHz Channel bandwidth 1 23MHz Channel precision 25kHz Frequency tolerance 0 05ppm Transmitting power 20W The maximum value measured at the cabinet top feeder port l 800MHz Band Working band 869 894MHz Channel bandwidth 1 23MHz Channel pre...

Page 25: ...on 25kHz Sensitivity of signal receiver Better than 126dB RC3 main and diversity receiving l 800MHz Band Working band 824 849MHz Channel bandwidth 1 23MHz Channel precision 30kHz Sensitivity of signal receiver Better than 127dBm RC3 main and diversity receiving l 1900MHz Band Working band 1850 1910MHz Channel bandwidth 1 23MHz Channel precision 50kHz Sensitivity of signal receiver Better than 126d...

Page 26: ...s the universal EMC standard of telecommunication equipment The EMC indices of the cBTS3612 comply with ETSI EN 300 386 V1 2 1 2000 03 IX System reliability MTBF hour 100000 MTTR hour 1 Availability A 99 999 Note The performance of cBTS3612 base station satisfies or excels TIA EIA 97 D Recommended Minimum Performance Standards for cdma2000 Spread Spectrum Base Stations 1 4 External Interface 1 4 1...

Page 27: ...ing GPS GLONASS antenna interface and system external synchronization interface When GPS GLONASS is not available and there is other clock synchronization equipment the clock synchronization output of the equipment can be connected with the external synchronization interface of BTS system l BTS test interface interface for BTS test providing such signals as 10MHz and 2s signal l Remote maintenance...

Page 28: ...ces of CDMA system Firstly standardized radio interface ensures that MSs of different manufacturers are fully compatible with different networks This is one of the fundamental conditions for the roaming function of CDMA system Secondly radio interface defines the spectrum availability and capacity of CDMA system Um interface is defined with the following features l Channels structure and access ca...

Page 29: ...60 470MHz 450 460MHz 10MHz 1 23 MHz 1 23 MHz 800MHz 869 894 MHz 824 849 MHz 45MHz 1 23 MHz 1 25 MHz 1900MHz 1930 1990 MHz 1850 1910 MHz 80MHz 1 23 MHz 1 25 MHz 2 Physical layer function l Service bearer the physical channel in the physical layer provides bearer for the logic channel of the higher layer l Bit error check the physical layer provides a transmission service with error protection inclu...

Page 30: ...gement on air interface 1 Radio resource management It is mainly used to establish operate and release radio channels and help to realize soft handoff softer handoff and hard handoff 2 Mobility management It is mainly used to support the mobility features of the mobile user performing such functions as registration authentication and Temporary Mobile Subscriber Identifier TMSI re allocation 3 Conn...

Page 31: ... TCH at a rate of 800bit s For more information about power control please refer to Section 4 5 1 Power Control VII Handoff Um interface supports many handoff technologies It supports three types of handoff in traffic channel communication 1 Hard handoff MS breaks the connection with the old BTS before establishing connection with a new BTS 2 Soft handoff MS establishes connection with a new BTS w...

Page 32: ...etup release OML signaling is used to perform operation and maintenance It is defined by equipment manufacturers On Abis interface there is a transparent channel used to bear OML between OMC and OMU of BTS SPU SDU A b i s S i g n a l i n g A b is S ig n a li n g A b i s T r a f f i c A b is T r a ff ic O M L O M L CEs CEs BSC BTS BTS OMU MC MC OMU Abis Interface SDU Selection Distribution Unit MC ...

Page 33: ... BTS and BSC which will forward it to OMC transparently BSC does not process any signaling that performs operation and maintenance Adaptation of Abis traffic is performed on the basis of AAL2 At Abis interface BCPM uses several PVCs to connect the channel processing unit of BTS and SDU of BSC for BTS to transmit the uplink data received from the air interface to BSC and for BSC to transmit the dow...

Page 34: ...FCH IS95 SCCH IS2000 FCH IS2000 DCCH and IS2000 SCH Each radio channel is allocated with one AAL2 link on Abis interface to bear user traffic data Caution Softer handoff is only allocated with one AAL2 link on Abis interface 4 Traffic channel bearing procedure BTS needs to process Abis interface frame protocol to transmit the data received from the reverse traffic channel on the air interface to B...

Page 35: ...e Function LMF Its interface protocol stack is shown as below LMF Signaling Application self defined TCP IP Data Link Layer Physical Layer 10 100 Base T 1 4 6 System Synchronization Interface System synchronization interface includes GPS GLONASS antenna interface and system external synchronization interface 1 GPS GLONASS antenna interface GPS is in compliance with ICD200c IRN 200C 001 IRN 200C 00...

Page 36: ...ability design of a system is shown in the stability and reliability of the product during operation Huawei cBTS3612 is designed based on reference to the following standards l YD T 1029 1999 800MHz General Technical Specifications of CDMA Digital Cellular Mobile Communication Network Equipment l YD T 1030 1999 800MHz Technical Requirement for Interface of CDMA Digital Cellular Mobile Communicatio...

Page 37: ...stem In respect of hardware reliability the following considerations have been taken I De rating design To improve system reliability and prolong the service life of components components are carefully selected and strictly tested and less stress electrical stress and temperature stress is to be borne than its designed rating II Redundancy design Redundant configuration of key units is applied in ...

Page 38: ...vercurrent protection The BTS system provides various means of over voltage and over current protection l Over voltage and over current hardware protection is provided for the DC DC power supply module l For secondary power supply to boards slow start is employed to prevent the great impact on the whole power supply load when the boards are powered on Fuse is installed for each board against over ...

Page 39: ...ration due to contingent faults IX Thermal design The influence of temperature on the BTS system has been considered in the design of the system Thermal design primarily concerns the selection of components circuit design including error tolerance drift design and derating design structure design and heat dissipation so that the BTS system can work reliably in a wide range of temperatures The firs...

Page 40: ...ent process goes under regulations such as CMM Capability Mature Mode which aim to control faults in the initial stage In software design much attention is devoted to the designing method and implementation the software is designed in a modular structure and in a loose coupling mechanism When a fault occurs to one module other modules will not be affected In addition preventive measures such as fa...

Page 41: ...ccurs to some transmission links traffic borne on them can be transferred to other links smoothly l Each board s software on the board has a static backup on BCKM l If software loading fails the system can return to the version that was loaded successfully last time l Important operations are recorded in log files l Different authority levels are provided for operations to prevent users from perfo...

Page 42: ...gh Um interface and the other end connected with BSC through Abis interface The architecture of BTS is as shown in Figure 2 1 Abis interface High speed data bus BCIM BSC Clock bus Backplane bus Emergency serial port POWER RS485 Um interface RF receive transmit antenna BCKM Baseband subsystem RF subsystem Power supply subsystem 48VDC GND 27VDC GND GPS GLONASS receive antenna LMF Environment alarm c...

Page 43: ... baseband data optical interface of RF module Baseband subsystem is located in the BTS baseband subrack It consists of BTS Control Clock Module BCKM BTS Resource Distribution Module BRDM BTS Channel Processing Module BCPM BTS Control Interface Module BCIM and CDMA Baseband Backplane Module CBKM Functions of all boards are highlighted as follows 1 BCKM At most 2 BCKMs are configured in hot standby ...

Page 44: ...ata and O M commands With the Inverse Multiplexing on ATM IMA technology BCIM multiplexes the BTS uplink data to IMA link set that is composed of multiple E1s and then transmits it to BSC via coaxial or optical fiber Inversely it can also demultiplex the IMA link set signals from BSC into an ATM cell flow and transmit it to BTS boards via the backplane bus 5 CBKM CBKM performs interconnection of h...

Page 45: ...ion in transmit and receive paths 2 BHPA BHPA performs high power linear amplification for a transmitted carrier signal checks its own working status in real time and generates alarm It is composed of main signal power amplification unit and signal detection alarm unit Signal detection is to check whether the input is too excited whether the temperature is too high or whether the gain is lowered s...

Page 46: ...enna feeder and dual satellite synchronization antenna feeder The former mainly transmits the modulated RF signals and receives MS information while the latter provides precise synchronization for CDMA system IV Power supply subsystem Power supply subsystem consists of power input component EMI filter lightning arrester of power supply high power DC DC power supply module power distribution box me...

Page 47: ... The interface is an RS232 serial port connected with PSTN via an external Modem When OML between OMC and BTS is interrupted maintenance can be performed through telephone line dial up connection l GPS GLONASS antenna interface It is used to receive clock signal from GPS GLONASS l System external synchronization interface When GPS GLONASS is not available it makes the system clock synchronized wit...

Page 48: ... and supporting E1 T1 transmission In the coming version BCIM slot can also accommodate BEOM BTS Electric Optical Module to support STM 1 optical transmission l BCPM BTS channel process board processing the data of CDMA forward channel and reverse channel l BRDM BTS resource distribution module connecting BCPM and RF module realizing the control of resource pool for BCPM l BCKM BTS control clock b...

Page 49: ...ilure l Connected with an external monitoring module in compliance with RS485 standard collecting and processing the equipment room environment information such as fire alarm water soaking temperature humidity l CLK unit is the clock source of BTS system providing working clock for all boards It provides high precision oscillation clock and can be synchronized with an external clock such as GPS cl...

Page 50: ...l Processing Unit CPU is connected with other boards of BTS through the backplane bus module processing or transmitting O M signaling from other boards of BTS BRDM BCPM and BCIM 4 External communication module External communication module utilizes the multiple communication c ontrol ports provided by the main control CPU to implement functions such as LMF interface external monitoring module inte...

Page 51: ...responding processing boards through the backplane bus l Each BCIM provides 8 E1 links which can support at most 4 IMA link sets In BTS there are two BCIMs providing physical interfaces to BSC in load sharing mode At most 16 E1 links can be provided l It communicates with BSC through IMA state machine program on the local board and monitors the working status of E1 link and ensuring the implementa...

Page 52: ...ngle ATM cell flow Then it sends AAL2 traffic cells to BCPM and AAL5 signaling cells to BCKM through the backplane bus 2 CPU module The main control CPU on BCIM implements such functions as initialization of devices on BCIM IMA protocol processing executing OAM function of IMA as well as E1 trunk line management and communication with BCKM 3 Backplane bus module BCIM communicates with other boards...

Page 53: ...e network side are processed by the high performance processor BCPM performs functions such as encoding convolutional code TURBO code interleaving spread spectrum modulation and data multiplexing and converts them into high speed signals Then the signals are processed by a dedicated processing chip and transmitted through the radio interface side of the channel processing board l In reverse direct...

Page 54: ...band processing chip 2 Baseband processing module The QUALCOMM new generation processing chip is used to perform forward and reverse baseband data processing With the help of in board and inter board data daisy chains channel processing capability is increased greatly Maximal 6 sectors can be supported 3 CPU module The high performance control CPU on BCPM m ainly processes the forward reverse high...

Page 55: ...ace Interface with other boards of baseband part l RS232 serial port As an emergency serial port it is connected with UART as a standby node used for communicating with BCKM when other part of the board is faulty IV Index The board size is 460mm 233 35mm powered with 27V power consumption 30W 2 2 5 Resource Distribution Module BRDM I Overview BRDM is logically located between BTRM and BCPM providi...

Page 56: ...nnel resource and makes the configuration of channel capacity of each sector carrier flexible l It exchanges O M information with BCKM through the backplane bus or emergency serial port l It forwards and receives O M information of BTRM via optical fiber and provides O M link between the baseband subrack and BTRM II Structure and principle The structure of BRDM module is as shown in Figure 2 7 Opt...

Page 57: ... data interface module mainly performs rate conversion of high speed signals for the convenient processing of the switching module l Switching module Switching module segments and paste data as required It is a core processing module of this board Data from BTRM are sent to this board where the switching module will distribute and paste them before sending to BCPM The switching module can also pro...

Page 58: ...2288MHz clock signals and clock active standby selection signal l RS232 serial port As an emergency serial port it is connected with UART as a standby node used for communicating with BCKM when other part of the board is faulty l Power interface Led out from the power connector on the backplane the interface is connected with 27V power 27V power ground and PGND IV Index The board size is 460mm 233...

Page 59: ...18 19 20 21 9 Figure 2 8 Functional units of all slots in CBKM A backplane includes the connector and board slot Connector part includes a slot for test board input connector of backplane 27V power ground and 3 DB37 D connectors Power input connector D connector are all crimped devices Slots of the backplane are defined as follows l Slots 0 1 are for BCIMs l Sots 10 11 are for BCKMs l Slots 8 9 12...

Page 60: ...oltage on the sheath and core of E1 trunk line to PGND II Structure and principle Board structure is as shown in Figure 2 9 8 E1s 4 E1s 4 E1s Interface DB37 BSC Interface DB25 Interface DB25 BESP BSC BCIM Level 1 protection Level 2 protection PGND Level 1 protection Level 2 protection PGND Level 1 protection Level 2 protection PGND Figure 2 9 Structure of BESP The board consists of three parts DB2...

Page 61: ...20mm Bearable surge current 10kA common mode 5KA differential mode Output residual voltage 30V 2 2 8 Fan Module BFAN BFAN is installed right under the baseband subrack serving as a part of the blower type cooling system of the baseband subrack The fan module consists of two fan boxes each of which has 4 fan units 24V DC brush free fan and one BTS Fan Monitor Module BFMM Fan enclosure is used for i...

Page 62: ... perform PWM speed adjustment on the fan units and report board status information to BCKM when it is queried BFMM can guarantee a safe and proper cooling system and lower system noise Its main functions are as follows l Control rotating speed of the fans l Check whether fan units are in position and report their information l Check and report fan unit blocking alarm l Drive fan operating status i...

Page 63: ...eport them to BCKM It generates panel indicator signal l Communication module It performs serial communication with BCKM l Fan driving module PWM control signal generated in MCU provides controlled power input for fans by isolating driving circuits l Fan in position and fault detection module This module isolates the fan in position signal and fan blocking alarm signal then convert them into logic...

Page 64: ...hey also serve as the interfaces for fan in position detection and fan blocked detection 4 Index The size of BFMM 280mm 35mm 27V power supply power consumption 5W II BTS Fan block iNterface Board BFNB 1 Overview BFNB provides electrical connection between the fan box and the system On one hand it provides blind mate interface for the fan box On the other hand it provides the system with power inte...

Page 65: ...r l System serial communication interface External serial communication interface is provided through DB 15 4 Index The size of BFNB 380mm 30mm 2 3 RF Subsystem 2 3 1 Overview The structure of RF subsystem is as shown in Figure 2 13 CDU RLDU BHPA BHPA BTRM BTRM To antenna feeder BRDM BRDM BHPA BTRM BRDM DFU f1 f0 f2 To antenna feeder BRDM Resource Distribution Module BTRM Transceiver Module BHPA H...

Page 66: ...n performs low noise amplification noise factor adjustable frequency down conversion and channel selective filtering 2 3 2 BTS Transceiver Module BTRM BTRM is in charge of modulating demodulating of baseband signal Analog Digital and Digital Analog AD DA conversion digital up down conversion and radio up down conversion I Structure and principle BTRM consists of BTS Intermediate Frequency Unit BIF...

Page 67: ... baseband filtering of the signals in the receive path On receiving the analog intermediate frequency signals via the radio interface it converts them into digital intermediate frequency signals via analog digital conversion Then the digital intermediate frequency signals are converted into baseband I Q signals via digital down conversion and baseband filtering As last the I Q signals are transmit...

Page 68: ...to specified RF band via two times of up conversions Before and after the up conversion wave filtering signal amplification and power control are performed so as to ensure the RF signals output meet the protocol requirements on power level Adjacent Channel Power Radio ACPR and spuriousness l Main diversity receiver It converts the RF signals output by RLDU to specified intermediate frequency signa...

Page 69: ...mm 2 3 3 BTS High Power Amplifier Module BHPA I Overview BHPA is located i n RF subrack of BTS cabinet and used for amplifying the RF modulation signals output by BTRM Its main functions are l RF power amplification perform power amplification for the RF modulation signals from BTRM l Over temperature alarm when the temperature of power amplifier base board exceeds a specified threshold BBFM will ...

Page 70: ...arm circuit monitors the power amplifier status and generates over temperature alarm over excited alarm and gain decrease alarm signals when necessary The alarm signals will be sent to BBFM where they will be processed and reported to BTBM The coupler is used to couple the RF output signals to the sampling port for test purpose The output power of HPAU can be adjusted by controlling the RF output ...

Page 71: ...ectors for BTRM six sets of 24W7 combination D type blind mate connectors for BHPA and three DB9 connectors for RLDU alarm collection and six sets of temperature sensors The above parts form three independent function groups as shown in Figure 2 18 l BTRM 2mm connector Each set of 2mm connectors includes one 5 22pin A connector and three 3 socket N connectors A connector transfers R LDU alarm sign...

Page 72: ...nal group 1 F u n c t i o n a l g r o u p 3 F u n c t i o n a l g r o u p 2 Figure 2 16 Functional blocks of BTBM l Index Board size L W T 664mm 262mm 3mm 2 3 5 Combining Duplexer Unit CDU I Overview CDU mainly has the following functions l Combine two carrier signals from the two BHPAs into one signal l Isolation and filtering of receiving and transmitting signals l Filtering of transmitting sign...

Page 73: ...and combiner it features lower insertion loss and effective isolation l Duplexer The duplexer is used to isolate transmitted signals and received signals suppress transmission spurious and reduce antenna quantity l Directional coupler The directional coupler couples forward reverse power to RLDU and monitors the antenna VSWR III Interface CDU is a module shared by transmit and receive path of the ...

Page 74: ...RLDU via the blind mate connector on the backside l Forward reverse coupled RF signals which are sent to RLDU via the blind mate connector on the backside l Forward reverse coupled test signals which are outputted through the standard SMA connector on the front side of CDU IV Index l Number of combined channels 2 l Supported frequency band 450MHz band 800MHz band l Module size L W H 450mm 100mm 34...

Page 75: ...on spurious and reduce antenna quantity l Diversity receive filter The diversity receive filter of DFU is a separate path Signals received by the diversity antenna must be filtered by the diversity receive filter in DFU before being sent to the low noise amplifier in RLDU for amplification l Directional coupler The directional coupler couples forward reverse power for RLDU and monitors the antenna...

Page 76: ...pled RF signals which are sent to RLDU via the blind mate connectors on the backside l Forward reverse coupled test signals which are outputted through the standard SMA connector on the front side IV Index l Supported frequency band 450MHz band l Module size L W H 450mm 100mm 344 8mm 2 3 7 Dual Duplexer Unit DDU I Overview DDU completes the following functions l Isolation and low pass filtering of...

Page 77: ...used to isolate transmitting signals and receiving signals suppress transmission spurious and reduce antenna quantity l Bi directional coupler The bi directional coupler couples forward reverse power for RLDU and monitors the antenna VSWR l T type feed connector This connector receives the RF signals and divides combines DC feeds so that the RF signals and DC go through different channels realizin...

Page 78: ...nsmitting forward reverse coupled RF signals which are sent to RLDU via the blind mate connector on the back side l Transmitting and receiving coupled test signals which are outputted through the standard SMA connector on the front side of DDU IV Index l Supported frequency band 1900MHz band Module size L W T 450mm 100mm 344 8mm 2 3 8 Receive LNA Distribution Unit RLDU I Overview RLDU consists of ...

Page 79: ...t BTS configurations When the BTS is configured in 3 sector mode the electronic switches can be set to make RLDU operate in a single sector mode that has two main diversity receiving paths Each path provides 1 in 4 output to support 1 4 carriers configuration for each sector When the BTS is configured in 6 sector mode the electronic switches can be set to make RLDU operate in two sector mode each ...

Page 80: ...cting 2 Interface signals between RLDU and BTRM are l Main diversity path receiving RF signals transmitted to BTRM after being amplified and distributed l Antenna VSWR LNA status monitoring alarm signals and forward power detecting voltage signals which are outputted to BRCU by RLDU through a DB15 interface on the front side of the module and transferred to BIFU for processing 3 The 27V DC power i...

Page 81: ...t the same time BBFM reports to BCKM the gain decrease over temperature over excited alarm and fan failure alarm of BHPA to ensure the reliability of BHPA module Specifically it functions to l Control fan speed monitor and report fan alarm l Monitor and report BHPA alarm l Drive fan monitor indicator module l Collect temperature information of BHPA module l Communicate with BTRM module 2 Structure...

Page 82: ...nel indicator signal and communicates with BTRM module l BHPA interface module This moduloe isolates and drives the interface with BHPA l Temperature information collection module This module collects the temperature information of BHPA module in real time which is implemented by MCU in query operation l Panel indicator driving and alarm signal isolation module It is used to drive the panel indica...

Page 83: ...a the fan cover interface It is an auxiliary board 2 Structure and principle The structure of BBFL is shown in Figure 2 23 Fan cover port connect to BBFM BHPA indicator FAN indicator BTRM indicator LED1 LED2 LED3 Fan 2 interface Fan 1 interface Figure 2 23 Structure of BBFL module BBFL consists of the following parts l Fan 1 interface module It is a 4pin ordinary socket connector connected with Fa...

Page 84: ... 0mm 25 0mm 2 4 Antenna Feeder Subsystem 2 4 1 Overview BTS antenna feeder subsystem consists of two parts RF antenna feeder and dual satellite synchronization antenna feeder The former transmits the modulated RF signals and receives MS signals while the latter provides precise synchronization for CDMA system 2 4 2 RF Antenna Feeder RF antenna feeder of the BTS is composed of outdoor antenna jumpe...

Page 85: ...ate the input power in specific directions Normally the higher gain the larger coverage But there may be blind area in the vicinity 2 Antenna pattern Antenna pattern describes the radiation intensity of the antenna in all directions In the field of telecommunication it usually means a horizontal pattern BTS antenna is available in two types 360â omni antenna and directional antenna The directional...

Page 86: ...arized diversity and space diversity In the present mobile communication system horizontal space diversity and polarized diversity are both supported Theoretical conclusion shows that space diversity is effective when the distance between two antennae is over 10 wavelengths Polarized diversity facilitates antenna installation and saves space therefore it is used more and more extensively 5 Antenna...

Page 87: ...her bands it is not necessary Tower top amplifier is used to further improve the signal quality Normally it is installed close to the antennas consisting of triplex filter and low noise amplifier The triplex filter is actually a device composed of two duplex filters Signals from the antennas first pass through the triplex filter to filter out the out band interference then the low noise amplifier ...

Page 88: ...time The 3D position is accurate to less than 10 yard approx 9 1m in space and less than 100ns in time The received signal is processed and used as the master reference frequency The whole system consists of three parts space part land control part and user part Space part is a group of satellites 20 183 kilometers high orbiting the earth at a speed of 12 hours circle There are 24 satellites toget...

Page 89: ...stem The user equipment receives C A code P code and two carrier signals modulated from the navigation data L1 1602MHz fL1 L2 1 246 MHz fL2 fL1 fL2 are frequency increments of different satellites to identify the position of the satellite and measure the distance between the user and the satellite In this way the position of the user can be figured out The algorithm used is similar to that of GPS ...

Page 90: ...ng wave ratio of less than 1 1 1 and signal attenuation of less than 0 1dB 1 2 2GHz V Receiver GPS receiver has 8 parallel paths capable of tracking 8 satellites concurrently The receiver receives GPS signal of band L1 1575 42MHz and tracks C A code The receiver must be powered with regulated 5V DC Inside the receiver the RF signal processor makes frequency down conversion to the GPS signal receiv...

Page 91: ...tion is report to BTRM through the universal monitoring bus to implement power management and monitoring The 48V power input is filtered by EMI filter and connected to the wiring terminal on the cabinet top and then connected to the power backplane input bus bar in the secondary power supply subrack The 27V power is output to the output bus bar of power subrack backplane then led out from the bus ...

Page 92: ...igure 2 26 Wiring terminals 48VIN GND DC DC DC DC DC DC Power supply subrack Switch box 48V power supply indication From cabinet top LGND DU TRX0 PGND RLDU1 TRX11 16 service units RLDU0 RLDU2 Indicator PCB DC DC DC DC Figure 2 26 Structure of power supply system 2 5 3 Technical Indices I DC input lightning protection DC input lightning protection part is an external cabinet top lightning arrester ...

Page 93: ...htning arrester is working normally If the green indicator is off and the red indicator is on it means the power input is abnormal components in the lightning arrester are damaged protection effect is deteriorated and the device must be replaced immediately The alarm node is a constantly closed contact It is closed when the lightning arrester is normal and it is open when arrester fails Regulated ...

Page 94: ...0mV 3 4k 30MHz Peak peak value noise voltage Ÿ100mV 0 20MHz Discrete noise voltage Ÿ5mV 3 4kHz 150kHz Ÿ3mV 150kHz 200kHz Ÿ2mV 200kHz 500kHz Ÿ1mV 500kHz 30MHz l Power efficiency 85 in full load l Dynamic performance Load effect recovery time Ÿ200µs 25 50 25 load variance 50 75 50 load variance Output overshoot Ÿ5 output voltage setting value l Equipment delay Ÿ5s l Safety requirement Insulation res...

Page 95: ...n test The power supply subsystem works in full load for 4 hours continuously at an ambient temperature of 55 2âC and all its technical indices can still meet the standard 2 5 4 Power Supply Monitoring The monitoring information of the whole power supply subsystem and each power supply module is provided via the RS485 serial port on the backplane Monitored contents include 1 Control value l Power ...

Page 96: ...monitoring system of the BTS consists of the environment monitoring devices and BCKM The environment monitoring devices collect environment information and report the information to OMC The environment monitoring devices consist of environment alarm collection box and the sensors The environment alarm collection box collects external environment parameter through the sensors The parameters are pro...

Page 97: ...d 2 6 2 Alarm Indicator The 10 red indicator on the alarm box panel correspond to the following alarm values l Fire alarm alarm generated due to over heat or by smoke detector l Smoke alarm overtime alarm generated by the smoke sensor l Temperature upper limit alarm generated when the ambient temperature exceeds the upper limit l Temperature lower limit alarm generated when the ambient temperature...

Page 98: ...ecified range l F starts the burglar alarm device The relay is activated when a burglar alarm occurs 2 Two PWM outputs driven by the collector open circuit gate The driving current is 300mA and the period 1 second by default can be defined by users The resolution is 8 bits 0 255 3 Seven collector open circuit gate outputs driving current 300mA for controlling the specified actuator 2 6 4 Communica...

Page 99: ...d Antenna Metal pipe Equipment Communication cable Power cable Hole such as window Pole or fence LPZ0Bisnotlikelytobe attacked by direct lightning with no attenuation in the electromagnetic field LPZ1isnotlikelytobeattackedby directlightning withnoattenuationin theelectromagneticfield Figure 2 27 IEC 61312 division of lightning protection zone BTS equipment is usually in LPZ1 and communication cab...

Page 100: ...onse in front of rectifier module Low power absorbing capability very quick response in rectifier module Level 1 protection Level 2 protection Level 3 protection Level 4 protection Considerable power absorbing capability normal response at the AC distribution point Figure 2 28 Illustration of lightning protection of BTS power II Principle of DC lightning arrester Level 5 protection is a built in i...

Page 101: ...ector BESP on top of the cabinet provides lightning protection II Connection to BTS via E1 trunk line The connection is shown in Figure 2 30 BESP BTS Transmission equipment BCIM 75 120 75 120 Grounding bar of the room Figure 2 30 Connection to BTS via trunk lines III BESP introduction E1 interface protection of BTS is implemented through a BESP on top of the cabinet In consideration of the limited...

Page 102: ...e cabinet 4 pairs of E1s Figure 2 31 Physical appearance of BESP E1 lightning protection unit has two inbound lines connected with DB25 two outbound lines connected with DB37 and one PGND Here PGNDs of all lightning protection units can be interconnected DB37 is male connector and DB25 is female connector with 8 pairs of shielded E1 cables connected 75Ù and 120Ù impedance match is provided with th...

Page 103: ... at three points l Antenna DC is grounded The inductive current on the conductor of the feeder can be discharged through the antenna l CDU DFU s DC is grounded The inductive current on the conductor of the feeder can be discharged through CDU DFU l When DDU is configured lightning arrester should be used between the feeder and indoor jumper With the above measures taken up to 8kA lightning current...

Page 104: ...ester When the voltage at both ends of the discharge tube comes to a specified value the two ends will be connected hence the lightning protection is realized The dual satellite synchronization antenna feeder adopts passive lightning protection Its equivalent circuit is shown in Figure 2 33 L1 1 2 C1 C2 C3 C4 L2 Figure 2 33 Lightning protection for BTS antenna feeder port ...

Page 105: ... BCIM software BCPM software Running on BCKM Operating system and lower layer driver BRDM software BTRM software Figure 3 1 cBTS3612 software architecture I cBTS3612 applications This part mainly realizes layered protocol of radio links and Abis interface protocol exercises real time management over radio resources and transmission equipment as well as performs operation maintenance to BTS equipme...

Page 106: ...l software Cell configuration and message update Channel management Active standby switchover Operation maintenance Resource management Figure 3 2 Structure of main control software III Software units 1 Resource management This unit consists of four sub modules l Resource status management When BTS resource status changes the main control software reports to BSC the current status of BTS resource ...

Page 107: ...essary to update the overhead message of the cell Overhead message includes system parameter message access parameter message and synchronization channel message l Cell breath control when the traffic load of adjacent cells is not balanced BSC activates the cell breath control The main control software reconfigures the cell attribute parameters as required by BSC to perform cell breath function 3 ...

Page 108: ...seizes a reverse dedicated channel or after the acquisition the air interface delay from the MS to the BTS changes over 1 chip BCPM will report to main control software about the air interface delay of this dedicated channel Then main control software forwards the channel delay information to BSC 4 Active standby switchover To improve the system reliability main control software works in active st...

Page 109: ...is not necessary to upgrade the software on the site of BTS 2 Status management This unit monitors the operation status of BTS boards and perform block unblock opertions for the channels 3 Data configuration This part configures the operation parameters of BTS boards including BTS attributes BTRM attributes and BCPM attributes and manages Abis interface circuit 4 Test management It is responsible ...

Page 110: ...and GPS GLONASS time information output from the serial port and generate various clock signals synchronous with GPS GLONASS system with the software phase locking algorithm II Structure Structure of clock software is shown in Figure 3 4 Clock software Operation maintenance Service application Figure 3 4 Structure of clock software III Introduction to software units 1 Service application This unit...

Page 111: ...CIM Software I Function The primary function of BCIM software is to set up ATM transmission link on Abis interface between BTS and BSC and perform transmission of signaling traffic and O M information between the two through related protocol stack Specifically it l Receives OMU configuration command and configures ATM transmission link on Abis interface l In a frame of 128 cells supports the maxim...

Page 112: ...e traffic layer of BCPM l Common channel processing l Traffic channel processing II Structure The structure of BCPM software is shown in Figure 3 6 BCPM software Service application Operation maintenance Figure 3 6 Structure of BCPM software III Introduction to software units 1 Service application This unit consists of 3 functional sub modules l Control management sub module the sub module sets up...

Page 113: ...k public query interface tracing board software loading link test and related functions l Private part perform channel processing parameter configuration status management alarm collection alarm processing and reporting 3 2 6 BRDM Software I Function BRDM software is used to relay BTRM signaling and control baseband data The main functions are l Relay of signaling for up to 36 BTRMs including main...

Page 114: ... 3 2 7 BTRM Software I Function BTRM software exercises management over BTRM The main functions include l Cell carrier configuration carrier parameter measurement and transmit gain compensation l Operation maintenance over BTRM module l Ensuring the precision of BTRM clock through software phase locking l Board device configuration BFMM environment monitor box management and optical link delay mea...

Page 115: ...orithm so that the crystal oscillator can provide a clock with satisfactory frequency and precision to the system 3 Others This part consists of 2 functional sub modules l Optical fiber delay calculation when the optical fiber is long the delay of optical link becomes significant BTRM software can calculate the delay of the optical link and reports the result to OMU so that OMU can make necessary ...

Page 116: ... each cabinet can be configured with 2 BCIMs so total 16 E1s can be configured I Star networking Star networking is the widely used especially in the densely populated urban area Start networking is as shown in Figure 4 1 In this mode each BTS is directly connected with BSC with an E1 trunk line The networking is simple and maintenance is easy Signals go through less links and the line is more rel...

Page 117: ...t evenly distributed Tree networking is as shown in Figure 4 3 In this mode signals go through many links so the line reliability is low and implementation and maintenance are difficult In addition the fault in the upper level BTS may affect the normal operation of the lower level BTSs Expansion is not easy and may cause substantial network reconstruction However tree networking requires much less...

Page 118: ...data Abis PCH Msg Transfer ECAM ECAM Traffic Channel Preamble Abis IS2000 FCH Rvs Preamble Abis IS2000 FCH Fwd Base Ack Base Ack Order Idle TCH Data Abis IS2000 FCH Rvs Idle Data MS Ack Order Abis IS2000 FCH Rvs Ms Ack Abis IS2000 FCH Fwd Service Connect Service Connect Msg Service Connect Complete Abis IS2000 FCH Rvs Ser Conn Comp CM Service Req Assignment Complete MSC Assignment Req ACH PCH TCH ...

Page 119: ... begins to send traffic channel preamble on the assigned reverse traffic channel After BTS captures the preamble it sends traffic channel preamble to BSC via Abis IS2000 FCH Rvs message 12 After BSC receives traffic channel preamble from MS BSC sends Base Ack order to BTS via Abis IS2000 FCH Fwd message BTS will send Base Ack Order to MS on the forward traffic channel 13 After MS receives Base Ack...

Page 120: ... PCH Msg Transfer GPM GPM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 PCH ACH PCH TCH PCH TCH TCH TCH TCH TCH TCH Figure 4 5 MS terminated call procedure 1 MSC sends Paging Request to BSC 2 BSC constructs General Paging Message GPM embeds it into Abis PCH Msg Transfer message then sends it to BTS BTS sends the GPM on the paging channel 3 After MS receives paging message it sends Paging Resp...

Page 121: ...Rvs message 15 After BSC receives the traffic channel preamble sent from MS it sends Base Ack order to BTS via Abis IS2000 FCH Fwd message BTS forwards the order to MS over the forward traffic channel 16 After MS receives Base Ack order it stops sending traffic channel preamble and starts sending data frame 17 After MS receives Base Ack order it sends MS Ack order to BTS BTS forwards the order to ...

Page 122: ...fter BTS receives origination message it sends BS acknowledgement to MS 3 BSC constructs a CM service request message and sends it to MSC 4 MSC sends assignment request message to BSC to request BTS to assign radio resources 5 BTS sends channel assignment message in the paging channel of air interface 6 MS begins to send preamble in the assigned reverse traffic channel 7 After acquiring the revers...

Page 123: ...nment complete message to MSC 16 MS negotiates with PDSN to establish PPP connection cooperatively In the case of Mobile IP access Mobile IP connection will be established PPP message and Mobile IP message are transmitted in traffic channel and are transparent to BSC PCF 17 After PPP connection is established the data service will enter connection state II SCH establishment This section describes ...

Page 124: ...lishes all of the channels it sends Abis BTS setup Ack to BSC indicating the completion of terrestrial circuit establishment 6 BSC sends Abis Burst Request to BTS to activate BTS 7 BSC responds Abis Burst Response message to BTS 8 BSC sends Abis Burst Commit to BTS and BTS starts to transmit SCH 9 BSC sends Extended Supplemental Channel Assignment Message and assigns SCH channel for MS so that the...

Page 125: ...k management BTS is responsible for assigning traffic link for Abis interface IV BTS logic operation maintenance BTS processes the following logic operation maintenance functions l Resource status indication l Cell configuration function l General message updating l Cell breath control function l Cell block unblock function l Radio measurement report function V Common channel processing BTS is res...

Page 126: ...sing of one traffic channel includes channel encoding rate adaptation block interleaving long code scrambling power control bit insertion Walsh code spreading spectrum signal modulation and baseband filtering as shown in Figure 4 8 Channel encoding Rate matching Block interleave Long code scrambling Walsh code spreading spectrum QPSK modulation Base band filtering Figure 4 8 Baseband processing in...

Page 127: ...coding extraction of frame information data as shown in Figure 4 9 Multi path signal demodulation De interleave Channel decoding Extract information bit Figure 4 9 Reverse channel processing flow 1 Multi path demodulation With Rake technology BTS can demodulate the radio multi path signals and effectively combine multi path energy 2 De interleaving Signals received from an MS have been interleaved...

Page 128: ...ion quality meanwhile restrict the transmitting power on the forward and reverse links thus minimizing the system interference l Overcome the far near effect caused by the freely distributed mobile stations so the signals of mobile stations whose distances to the BTS are different can reach the BTS with the same power l Realize the system soft capacity control l Prolong MS battery life l Minimize ...

Page 129: ...control Reverse power control includes open loop power control and closed loop power control The closed loop power control can be sub divided into inner loop power control and outer loop power control l Open loop power control method The MS will determine transmitting power intensity to access the BTS according to the received pilot signal strength l Closed loop power control method The BTS issues...

Page 130: ...doff and traffic handoff l Rescue handoff When the MS is leaving the cell coverage area and the conversation quality is unbearably poor the handoff occurs in order to avoid the interruption of the call l Better cell handoff If the rescue handoff condition is not triggered this handoff may occur if conversation quality or network performance can be improved The handoff is called better cell handoff...

Page 131: ... reverse RC2 l Forward RC3 or RC4 and reverse RC3 l Forward RC5 and reverse RC4 With the different RC cdma2000 1X presents different capabilities RC1 and RC2 are compatible with IS 95A B Each RC supports different traffic channel data rate The specific data rates are listed in Table 4 1 and Table 4 2 Table 4 1 Forward channel rates Channel type Channel rate bit s F SYNCH 9600 F PCH 9600 or 4800 F ...

Page 132: ...annel is shown in Figure 4 11 F TCH Forward CDMA channel F CACH F CPCCH F PICH F CCCH F DCCH F FCH F PC F SCCH F SCH F PICH F TDPICH F APICH F ATDPICH F SYNCH F BCH F PCH F QPCH Sub channel RC1 2 RC3 5 Figure 4 11 Forward physical channels l F CACH Forward Common Assignment Channel F CACH is specially used for transmitting the assignment information in quick response to the reversed channel and pr...

Page 133: ...nnel F CCCH provides encoding interleave spreading and modulation spread spectrum signals used by the MS in the BTS coverage area BTS will send the system information and the designated MS information on this channel l F SYNCH Forward Sync Channel The MS in the coverage of BTS gets initial synchronization information from F SYNCH The rate of synchronization channel is 1200bit s and the frame lengt...

Page 134: ...formation with the same data rate The frame length of paging channel is 20ms Each frequency of the sector can support seven paging channels at most l F QPCH Forward Quick Paging Channel This is used to send paging order and the system configuration changing order to MSs working in sub timeslot mode instructing them to receive the paging messages Thus the MS battery energy can be saved Quick paging...

Page 135: ...ted paging channel Maximum 32 access channels can be supported l R TCH Reverse Traffic Channel R TCH is used by MS to send the user information and signaling information in the course of the call In the configuration of RC1 RC2 R TCH can be sub divided into R FCH Reverse Fundamental Channel and R SCCH Reverse Supplemental Code Channel In the configuration of RC3 RC4 R TCH can be sub divided into R...

Page 136: ... channels in call procedure please refer to 4 2 Call Procedure 4 5 5 Easy Installation and Operation RF blind mate technology is used in RF part of BTS During the installation or maintenance the user just need to insert the modules into corresponding slots of the subrack and the tedious work of cabling is saved BTS RF system can be remotely controlled by OMC transmit power receiver sensitivity and...

Page 137: ...BCKM transfers the software to other boards When BTS is powered on and starts operation the boards will run the existing software in its Flash Memory Only when the software is upgraded will download command be sent through OMC LMF or FTP tool to activate the software downloading process II Software loading from OMC to BCKM In software upgrading the software is downloaded from OMC to BCKM memory an...

Page 138: ...nnection of transmission paths Actually AAL2 link is set up and released dynamically Disconnection of traffic channel is the disconnection of ATM transmission path on Abis interface When BTS configuration changes Abis configuration can be changed or this function may be used for maintenance II Air interface management Main function of the logic part of air interface management is fulfilled by logi...

Page 139: ...k Loopback data are sent from the control console forwarded by OMU to the high layer of board software and looped back Then OMU will make judgment whether the data are correct and return the information to the control console 4 6 4 Status Management Board status serves as a base for determing system working status resource distribution and fault locating Board status includes the operational statu...

Page 140: ...Not installed Operation is abnormal since software or hardware is not installed This status occurs between board initialization and the sending of configuration data In this period the software may be downloaded or activated Degraded Fault is not serious performance is lowered and the system operates at a low level Minor alarm occurs In test In test status irrelevant to operation status Test statu...

Page 141: ...ough the alarm box such as air conditioner fire distinguisher smoke scrubber dehumidifier or siren At the same time OMU reports the alarms to OMC which will be displayed on graphic user interface of OMC 4 6 6 Equipment Management Equipment management here means general management oriented to physical objects hardware Management and operation of special equipment may also be involved I General func...

Page 142: ...ment of some special functional units of BTS including clock configuration BCIM configuration and BRDM configuration 1 Configuration of clock parameters The function of BTS clock module is to provide radio synchronization clock CDMA system is a synchronized communication system which requires strict time synchronization between base stations The reference time of the public CDMA system is GPS time...

Page 143: ...ions include board configuration antenna feeder connection configuration power amplifier connection configuration and BTS local cell configuration I BTS hardware configuration BTS hardware configuration is to add or remove specified physical board for site configuration OMC sends hardware configuration message and the result of execution is that BTS board is in the specified configuration status I...

Page 144: ...ding l Abis O M message between OMC and OMU l O M message between OMU and other functional units inside BTS l Abis signaling between BSC and BCKM l Interface message between BCKM and BCPM BTRM l Communication message between active and standby boards This function supports the tracing on multiple interfaces from several control consoles at the same time The other function is to trace the board res...

Page 145: ...er supply subrack l RF subrack l RLDU subrack l CDU DFU subrack BTS is designed to accommodate 36 sector carriers in full configuration and supports the combination of 3 cabinets one basic cabinet and two extended cabinets The difference between a basic cabinet and an extended cabinet is that a basic cabinet needs a baseband subrack and f an subrack The basic cabinet and extended cabinet are conne...

Page 146: ...ack P S U P S U P S U P S U RLDU RLDU C D U C D U C D U C D U C D U B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M Fan box 2 Fan subrack PSU subrack RF subrack RLDU subrack CDU DFU subrack RF subrack Figure 5 1 Configuration of a basic cabinet Difference between basic ca...

Page 147: ...User Manual Airbridge cBTS3612 CDMA Base Station System Description 5 System Configuration 5 3 Figure 5 2 Front view of a basic cabinet ...

Page 148: ... Each BCIM boards can support 8 E1 links II BCPM BCPM board is the channel processing board of BTS At most 12 BCPMs can be configured in the baseband subrack There are two types of BCPMs The processing capability of type A BCPM is 64 reverse channels and 128 forward channels while the capability of type B BCPM is 128 reverse channels and 256 forward channels BCPMs are configured based on the chann...

Page 149: ...RDM is used to cascade the SoftSite ODU3601C Providing 6 pairs of ports for leading out optical fibers the multi mode BRDM can be connected with 6 BTRMs For full configuration of 36 BTRMs 6 BRDMs are needed In the case BTRMs are less than 6 only 1 BRDM should be configured For 6 12 BTRMs 2 BRDMs are needed The BRDM should be configured from slot No 12 and No 13 When more than 12 BTRMs are configur...

Page 150: ...ured when there are no more than 3 BTRMs One more power supply module is needed for every 3 new BTRMs added Since current equalization output and centralized powering is used power supply modules can be inserted in any slots of the basic cabinet and extended cabinet The configuration of power supply modules in a basic cabinet is as follows Configuration unit BTRM Power supply module quantity unit ...

Page 151: ...g to actual implementation There is one CDU DFU DDU subrack configured with 1 6 CDUs or DFUs or DDUs according to needs Each DFU supports 1 BTRM Each DDU supports 2 BTRMs carrier spacing is not necessary Each CDU supports 2 BTRMs the BTRMs supported by each CDU should be larger than or equal to 2 carrier spacing The configuration of RF devices varies with the quantity of BTRMs For CDU and DDU the ...

Page 152: ... cell i e O 1 l 1 carrier 3 sectors i e S 1 1 1 l 2 carriers 3 sectors i e S 2 2 2 l 3 carriers 3 sectors i e S 3 3 3 II Typical configuration of cBTS3612 for 800MHz band l 2 carriers omni cell i e O 2 l 1 carrier 3 sectors i e S 1 1 1 l 4 carriers 3 sectors i e S 4 4 4 l 2 carriers 6 sectors i e S 2 2 2 2 2 2 5 2 1 Typical Configuration of cBTS3612 for 450MHz Band The duplex supported currently i...

Page 153: ...OUT TX_IN Main_ ANT Div _ ANT Main_RX_OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT DFU A_Main_RX_IN A_Div _RX_IN A_FWDCPL_IN A_REVCPL_IN B_Main_RX_IN B_Div _RX_IN B_FWDCPL_IN B_REVCPL_IN A_Rm1 A_Rm2 A_Rm3 B_Rm1 A_Rm4 B_Rm2 A_Rd1 A_Rd2 A_Rd3 B_Rd1 A_Rd4 B_Rd2 RLDU Mode 1 BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd Figure 5 7 Logic connection of RF modules for O 1 configuration ...

Page 154: ...nnas or 1 bipolarization directional antenna for each sector l The configuration of the RF modules is shown in Figure 5 8 l Logic connection of RF modules of one sector is shown in Figure 5 7 D F U B H P A B T R M RLDU D F U D F U B H P A B T R M B H P A B T R M RLDU RLDU sector0 sector2 sector1 Figure 5 8 S 1 1 1 RF configuration III S 2 2 2 Configuration The following is the configuration of cBT...

Page 155: ... sector2 sector1 D F U D F U D F U Figure 5 9 S 2 2 2 RF configuration Note The CDU frequency is not adjustable The carrier channel number of its upper corresponding subrack is higher and the carrier channel number of its lower corresponding subrack is lower In the actual configuration the specific carrier module slot should be determined by the specific CDU channel numbers For example When the 16...

Page 156: ..._OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT DFU BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd PA_IN PA_OUT BHPA Figure 5 10 Logic connection of one sector RF modules for S 2 2 2 configuration IV S 3 3 3 Configuration The following is the configuration of Type S 3 3 3 i e 3 carriers x 3 sectors l 1 BCIM 2 BRDMs 1 2 BCKMs and BCPM can be configured according to actual requirement l 4 power supply modules l ...

Page 157: ...m Configuration 5 13 C D U B H P A B T R M RLDU C D U C D U B H P A B T R M B H P A B T R M RLDU RLDU B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M sector0 sector2 sector1 D F U D F U D F U Figure 5 11 S 3 3 3 RF configuration ...

Page 158: ...X_RFd TX Main_ ANT Div _ ANT Main_RX_OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT DFU BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd PA_IN PA_OUT BHPA Figure 5 12 Logic connection of one sector RF modules for S 3 3 3 configuration 5 2 2 Typical Configuration of cBTS3612 for 800MHz Band The duplex supported currently in this band is CDU I O 2 Configuration The configuration of cBTS3612 for O 2 includes l 1 BC...

Page 159: ...X_OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT CDU A_Main_RX_IN A_Div _RX_IN A_FWDCPL_IN A_REVCPL_IN B_Main_RX_IN B_Div _RX_IN B_FWDCPL_IN B_REVCPL_IN A_Rm1 A_Rm2 A_Rm3 B_Rm1 A_Rm4 B_Rm2 A_Rd1 A_Rd2 A_Rd3 B_Rd1 A_Rd4 B_Rd2 RLDU Mode 1 PA_IN PA_OUT BHPA PA_IN PA_OUT BHPA BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd Figure 5 14 Logic connection of RF modules for O 2...

Page 160: ... can be configured according to actual requirement l 2 power supply modules l 2 unipolarization directional antennas or 1 bipolarization directional antenna for each sector l The configuration of the RF modules is shown in Figure 5 15 l Logic connection of RF modules of one sector is shown in Figure 5 16 C D U B H P A B T R M RLDU C D U C D U B H P A B T R M B H P A B T R M RLDU RLDU sector0 secto...

Page 161: ...ly 201 these modules should be installed in the lower subrack BHPA PA_IN PA_OUT TX1_IN TX2_IN Main_ ANT Div _ ANT Main_RX_OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT CDU A_Main_RX_IN A_Div _RX_IN A_FWDCPL_IN A_REVCPL_IN B_Main_RX_IN B_Div _RX_IN B_FWDCPL_IN B_REVCPL_IN A_Rm1 A_Rm2 A_Rm3 B_Rm1 A_Rm4 B_Rm2 A_Rd1 A_Rd2 A_Rd3 B_Rd1 A_Rd4 B_Rd2 RLDU Mode 1 BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd Figure 5 ...

Page 162: ...e sector is shown in Figure 5 18 B H P A B T R M RLDU C D U RLDU RLDU C D U C D U C D U C D U C D U B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M sector0 sector2 sector1 Figure 5 17 S 4 4 4 RF configuration ...

Page 163: ...PA_OUT BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd Figure 5 18 Logic connection of one sector RF modules for S 4 4 4 configuration IV S 2 2 2 2 2 2 Configuration The following is the configuration of Type S 2 2 2 2 2 2 i e 2 carriers x 6 sectors l 1 BCIM 2 BRDMs 1 2 BCKMs...

Page 164: ... _RX_OUT FWDCPL_OUT REVCPL_OUT CDU A_Main_RX_IN A_Div _RX_IN A_FWDCPL_IN A_REVCPL_IN B_Main_RX_IN B_Div _RX_IN B_FWDCPL_IN B_REVCPL_IN A_Rm1 A_Rm2 A_Rm3 B_Rm1 A_Rm4 B_Rm2 A_Rd1 A_Rd2 A_Rd3 B_Rd1 A_Rd4 B_Rd2 RLDU Mode 1 TX1_IN TX2_IN Main_ ANT Div _ ANT Main_RX_OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT CDU Sector0 antenna Sector0 BHPA PA_IN PA_OUT TX_RFm RX_RFm RX_RFd TX_RFd BTRM BRCM BIFM BHPA PA_IN P...

Page 165: ...also in the future with reference to 1900MHz band planning I O 1 Configuration The configuration of cBTS3612 for O 1 includes l 1 BCIM 1 BRDM 1 2 BCKMs and BCPM can be configured according to actual requirement l 2 power supply modules l 2 unipolarized omni antennas l The configuration of the RF modules is shown in Figure 5 21 l Logic connection of RF modules is shown in Figure 5 22 D D U RLDU B H...

Page 166: ...e 1 BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd TX2_IN Figure 5 22 Logic connection of RF modules for O 1 configuration II S 1 1 1 Configuration The following is the configuration of cBTS3612 for Type S 1 1 1 i e 1 carrier x 3 sectors l 1 BCIM 1 BRDM 1 2 BCKMs and BCPM can be configured according to actual requirement l 2 power supply modules l 2 unipolarization directional antennas or 1 bipolariza...

Page 167: ...2 2 Configuration The following is the configuration of cBTS3612 for Type S 2 2 2 i e 2 carriers x 3 sectors l 1 BCIM 1 BRDM 1 2 BCKMs and BCPM can be configured according to actual requirement l 3 power supply modules l 2 unipolarization directional antennas or 1 bipolarization directional antenna for each sector l The configuration of the RF modules is shown in Figure 5 24 l Logic connection of ...

Page 168: ...guration BHPA PA_IN PA_OUT TX1_IN Main_ ANT Div _ ANT Main_RX_OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT DDU A_Main_RX_IN A_Div _RX_IN A_FWDCPL_IN A_REVCPL_IN B_Main_RX_IN B_Div _RX_IN B_FWDCPL_IN B_REVCPL_IN A_Rm1 A_Rm2 A_Rm3 B_Rm1 A_Rm4 B_Rm2 A_Rd1 A_Rd2 A_Rd3 B_Rd1 A_Rd4 B_Rd2 RLDU Mode 1 BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd TX2_IN BHPA PA_IN PA_OUT BTRM TX_RFm RX_RFm RX_RFd BRCM BIFM TX_RFd F...

Page 169: ...directional antennas or 1 bipolarization directional antenna for each sector l The configuration of the RF modules is shown in Figure 5 26 l Logic connection of RF modules of two sector is shown in Figure 5 27 D D U B H P A B T R M RLDU D D U D D U B H P A B T R M B H P A B T R M RLDU RLDU B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M B H P A B T R M sector2 secto...

Page 170: ...Rm2 A_Rd1 A_Rd2 A_Rd3 B_Rd1 A_Rd4 B_Rd2 RLDU Mode 1 TX1_IN TX2_IN Main_ ANT Div _ ANT Main_RX_OUT Div _RX_OUT FWDCPL_OUT REVCPL_OUT DDU Sector0 antenna Sector0 BHPA PA_IN PA_OUT TX_RFm RX_RFm RX_RFd TX_RFd BTRM BRCM BIFM BHPA PA_IN PA_OUT TX_RFm RX_RFm RX_RFd TX_RFd BTRM BRCM BIFM Sector1 BHPA PA_IN PA_OUT TX_RFm RX_RFm RX_RFd TX_RFd BTRM BRCM BIFM BHPA PA_IN PA_OUT TX_RFm RX_RFm RX_RFd TX_RFd BTR...

Page 171: ...0MHz A 1 2 Access Probe Acquisition The access probe failure rates under the reliability of 90 is below the maximum values listed in Table A 1 Table A 1 Access probe failure rates Eb N0 Per RF input point dB Maximum failure rate 5 5 50 6 5 10 A 1 3 R TCH Demodulation Performance I Performance of R TCH in Additive White Gaussian Noise AWGN The demodulation performance of the Reverse Traffic Channel...

Page 172: ...emodulation performance test under RC2 FER limits Data rate bit s Lower limit Eb N0 Upper limit Eb N0 14400 5 0 3 2dB 0 2 3 8dB 7200 6 3 3 2dB 0 7 3 2dB 3600 5 8 3 2dB 1 0 3 2dB 1800 3 5 3 2dB 1 0 3 2dB Table A 4 Maximum FER of F FCH or R DCCH receiver in demodulation performance test under RC3 FER limit Data rate bit s Lower limit Eb N0 Upper limit Eb N0 9600 2 3 2 4 dB 0 3 3 0 dB 4800 2 3 3 8 dB...

Page 173: ...B 0 4 3 7 dB 3600 1 7 4 6 dB 0 3 5 2 dB 1800 1 6 6 6 dB 0 5 7 2 dB Table A 8 Maximum FER of R SCH receiver of demodulation performance test under RC4 FER limit Data rate bit s Lower limit Eb N0 Lower limit Eb N0 28800 10 1 7 dB 1 9 2 3 dB 57600 12 1 6 dB 1 7 2 2 dB 115200 14 1 6 dB 2 0 2 2 dB 230400 12 1 7 dB 1 7 2 3 dB Table A 9 Maximum FER of R SCH Turbo Code receiver of demodulation performance...

Page 174: ...e channel models of the R TCH receiving performance test in multipath environment are listed in Table A 11 Table A 10 Standard channel simulator configuration Standard channel Simulator configuration Speed Number of Paths Path 2 power corresponds to path 1 Path 3 power corresponds to path 1 Deferring path 1 input Deferring path 2 input Deferring path 3 input B 8km h 2 0dB N A 0µs 2 0 µs N A C 25km...

Page 175: ...C2 FER limits Case Data rate bit s Lower limit Eb N0 Upper limit Eb N0 14400 1 3 0 8 7200 1 0 0 5 3600 0 7 0 4 B 1800 0 6 0 5 14400 1 7 0 6 7200 1 6 0 6 3600 1 5 0 9 D 1800 2 2 1 2 14400 0 9 0 3 7200 0 9 0 4 3600 1 1 0 6 D2 1800 1 5 0 9 III Performance in multipath fading with Closed Loop power control The performance of the demodulation of the Reverse Traffic Channel in a multipath fading environ...

Page 176: ... bit s Lower limit Eb N0 Upper limit Eb N0 9600 2 8 5 9 dB 0 3 6 5 dB 4800 7 6 5 9 dB 2 2 6 5 dB 2400 23 0 5 9 dB 12 0 6 5 dB B 1200 22 0 5 9 dB 14 0 6 5 dB 9600 1 5 7 1 dB 0 7 7 7 dB 4800 8 0 7 1 dB 4 8 7 7 dB 2400 18 0 7 1 dB 13 0 7 7 dB C 1200 16 0 7 1 dB 12 0 7 7 dB Table A 17 Maximum FER of demodulation performance test of R FCH receiver under RC2 FER limits Case Data rate bit s Lower limit E...

Page 177: ... 7 dB 2700 1 4 7 2 dB 0 6 7 8 dB C 1500 1 4 8 8 dB 0 6 9 4 dB 9600 20 ms 2 0 4 7 dB 0 5 5 3 dB 4800 2 0 5 7 dB 0 5 6 3 dB 2700 1 8 6 9 dB 0 5 7 5 dB D 1500 1 7 8 5 dB 0 5 9 1 dB Table A 19 Maximum FER of demodulation performance test of R SCH Turbo Code receiver under RC3 FER limits Case Data rate bit s Lower limit Eb N0 Upper limit Eb N0 307200 10 2 6 dB 2 0 3 2 dB 153600 10 2 6 dB 2 0 3 2 dB 768...

Page 178: ... 7200 1 7 5 6 dB 0 7 6 2 dB 3600 1 5 6 7 dB 0 6 7 3 dB C 1800 1 6 8 4 dB 0 7 9 dB 14400 2 0 4 6 dB 0 5 5 2 dB 7200 2 0 5 1 dB 0 5 5 7 dB 3600 1 9 6 3 dB 0 5 6 9 dB D 1800 1 8 8 1 dB 0 6 8 7 dB Table A 22 Maximum FER of demodulation performance test of R SCH Turbo Code receiver under RC4 FER limits Case Data rate bit s Lower limit Eb N0 Upper limit Eb N0 230400 10 2 4 dB 1 4 3 0 dB 115200 9 0 2 5 d...

Page 179: ...evel is inputted at BTS RF main and diversity input ports III Single tone desensitization 450MHz band Input the single tone interference deviated from the center frequency at the BTS RF input port when the single tone interference deviates from the center frequency 900kHz and 900kHz the input single tone interference power is 87dB higher than the output power of the mobile station simulator When R...

Page 180: ... and 1700kHz respectively and 900kHz and 1700kHz respectively the input single tone interference power is 72dB higher than the output power of the mobile station simulator When R TCH FER keeps 1 5 the output power of the mobile station simulator changes less than 3dB whether there are two single tone interference or no int erference 1900MHz band Input two single tone interference of center frequen...

Page 181: ...N0 where Eb is the energy per bit including the pilot and power control overhead and N0 is the total received noise pulse interference power in the CDMA bandwidth including the interference from other subscribers The RSQI report values are list in Table A 24 Table A 24 RSQI range Eb N0 dB per input port Minimum Acceptable Report Value Maximum Acceptable Report Value 4 10 18 5 12 20 6 14 22 7 16 24...

Page 182: ...all be within 1 µs of each other Time tolerance of pilot channel and other code division channels in the same CDMA channel time error between the pilot channel and other forwarding code division channels is 50ns The phase differences between the Pilot Channel and all other code channels sharing the same Forward CDMA Channel should not exceed 0 05 radians and shall not exceed 0 15 radians II Wavefo...

Page 183: ...Hz band Offset from carrier central frequency Spurious requirement 750 kHz 1 98 MHz 45 dBc 30 kHz 1 98 MHz 4 00 MHz 60 dBc 30 kHz Pout 33 dBm 27 dBm 30 kHz 28 dBm Pout 33 dBm 55 dBc 30 kHz Pout 28 dBm 4 00 MHz ITU Class A Requirement 13 dBm 1 kHz 13 dBm 10 kHz 13 dBm 100 kHz 13 dBm 1 MHz 9 kHz f 150 kHz 150 kHz f 30 MHz 30 MHz f 1 GHz 1 GHz f 5 GHz 4 00 MHz ITU Class B Requirement 36 dBm 1 kHz 36 ...

Page 184: ... Manual Airbridge cBTS3612 CDMA Base Station System Description Appendix A Technical Performance of Receiver and Transmitter A 14 II Radiated spurious emissions In compliant with local radio specifications ...

Page 185: ... 386 V1 2 1 2000 03 They are described in two aspects EMI EelectroMagnetic Interference and EMS ElectroMagnetic Sensitivity B 1 EMI Performance 1 Conductive emission CE at DC input output port CE performance indices are listed in Table B 1 Table B 1 CE index at 48V port Threshold dB µV Frequency range Average Quasi peak 0 15 0 5MHz 0 5 5MHz 5 30MHz 56 46 46 50 66 56 56 60 2 Radiated emission RE RE...

Page 186: ...ransient interference test is class B Requirement for power drop and level interruption is shown in Table B 4 Table B 4 Requirement for power drop and level interruption Test port Test level Performance class Drop 30 Last for 10ms A Drop 60 Last for 100ms When there is backup power A When there is no backup power the communication link need not be maintained It can be re created and the user data ...

Page 187: ...t port of the connection line when cabinets are combined should satisfy the requirement for RF conductive anti interference Voltage level is shown in Table B 6 Table B 6 Voltage level Test port Voltage level Performance class DC line port AC line port Signal line port and control line port 3V A Note Test method is the same as IEC61000 4 6 9 5 Surge For CDMA equipment the DC power input port indoor...

Page 188: ...torage or the data being processed related to the tested switching equipment Equipment performance is not lowered Performance class B it means that BTS can withstand the test without any damage There is no change in the software or the data in storage Communication performance is lowered a little but in the tolerance as defined for different products The existing communication link is not interrup...

Page 189: ...C2 1S3 M2 and IEC 300 019 2 1 T1 2 Weather Protection No T emperature Control level Normal storage temperature should be in the range of 25âC 55âC and that of humidity in the range of 10 100 3 Transportation environment In compliance with IEC60721 3 2 2K4 2B2 2C2 2S2 2M2 and IEC 300 019 2 2 T2 3 Public Transportation level Normal transportation temperature should be in the range of 40âC 70âC and t...

Page 190: ... 019 2 1 T1 2 Weather Protection No Temperature Control level In normal storage place the solar radiation should not exceed 1120W m 2 thermal radiation should not exceed 600W m 2 and illumination should satisfy t he requirement for working visibility and comfort 3 Transportation environment In compliance with IEC60721 3 2 2K4 2B2 2C2 2S2 2M2 and IEC 300 019 2 2 T2 3 Public Transportation level In ...

Page 191: ...ess 70 106 KPa Wind speed 30 m s SO2 0 3 1 0 mg m3 H2S 0 1 0 5 mg m3 Cl2 0 1 0 3 mg m3 HCl 0 1 0 5 mg m3 NOx 0 5 1 0 mg m3 NH3 0 5 3 0 mg m3 HF 0 01 0 03 mg m3 O3 0 05 0 1 mg m3 3 Transportation environment In compliance with IEC60721 3 2 2K4 2B2 2C2 2S2 2M2 and IEC 300 019 2 2 T2 3 Public Transportation level Atmospheric pressure 70 106 kPa Wind speed 20 m s SO2 1 mg m3 H2S 0 5 mg m3 Cl2 No requi...

Page 192: ...rmissible levels stated in the standard Therefore certain sites do not require an evaluation by nature of its design It could be that the antennas are placed high enough thereby resulting in extremely low RF fields by the time it reaches areas that would be accessible to people Environmental evaluations are required for Paging and Cellular Radiotelephone Services Part 22 Subpart E and H l Non roof...

Page 193: ... as averaged over 30 minutes for the general public and 6 minutes for trained personnel The exposure criteria is frequency dependent and a chart covering the range from 3 kHz to 100 GHz can be found in NCRP No 86 references IEEE C95 1 1991 Below are the limits Limits for Occupational Controlled Exposure Frequency Range MHz Electric Field Strength E V m Magnetic Field Strength H A m Power Density S...

Page 194: ...magnetic fields The maximum output power given in EIRP of a base station is usually limited by license conditions of the network operator A rough estimation of the expected exposure in power flux density on a given point can be made with the following equation The calcualtions are based on FCC OET 65 Appendix B π 4 2 m r G W P S numeric Whereas P Maximum output power in W of the site G numeric Num...

Page 195: ...xclusion Zones 1 Antenna location should be designed so that the public cannot access areas where the RF radiation exceeds the levels as described above 2 If there are areas accessible to workers that exceed the RF radiation exceeds the levels as described above make sure that workers know where these areas are and that they can and do power down or shut down the transmitters when entering these a...

Page 196: ...n designing co location sites where multiple antennas owned by different companies are on the same structure This applies particularly to sites that include high power broadcast FM TV antennas Local zoning often favors co location but co location can provide challenging RF safety problems 8 For roof mounted antennas elevate the transmitting antennas above the height of people who may have to be on...

Page 197: ...Requirements Mapping for cdma2000 standards IV System performance TIA EIA 97 D Recommended Minimum Performance Specification for cdma2000 Spread Spectrum Base Station E 2 Abis Interface I Physical layer 1 E1 interface E1 Physical Interface Specification September 1996 2 SDH STM 1 ANSI T1 101 Synchronization Interface Standard ITU T G 707 3 96 Network node interface for the synchronous digital hier...

Page 198: ...ptation Layer Type 2 Specification ITU T I 363 5 B ISDN ATM Adaptation Layer 5 Specification Type 5 AAL IV TCP IP RFC791 Internet Protocol RFC793 Transport Control Protocol V Abis interface high layer protocol 3GPP2 A R0003 Abis interface technical report for cdma2000 1X Spread Spectrum System VI Self defined standard cdma2000 1X Abis Interface High Layer Protocol E 3 Lightning Protection l IEC 61...

Page 199: ...eo and Audio Equipment l 73 23 EEC Low Voltage Directive l UL 1950 Safety of information technology equipment Including Electrical Business Equipment l IEC60529 Classification of degrees of protection provided by enclosure IP Code E 5 EMC l TS 25 113v3 1 0 3rd Generation Partnership Project Technical Specification Group Radio Access Networks Base station EMC l ITU R Rec SM 329 7 Spurious emissions...

Page 200: ...FM BTS BTRM FAN Monitor BCIM BTS Control Interface Module BCKM BTS Control Clock Module BCPM BTS Channel Process Module BDCS BTS Direct Current Switchbox BEOM BTS Electric Optical Module BESP BTS E1 Surge Protector BFAN BTS FAN Module BFMM BTS Fan Monitor Module BFNB BTS Fan Block Interface Board BHPA BTS High Power Amplifier Unit BICM BTS Intermediate Frequency Control Module BIFU BTS Intermediat...

Page 201: ...Channel F BCH Forward Broadcast Channel FCACH Forward Common Assignment Channel FCC Federal Communications Commission F CCCH Forward Common Control Channel FCH Fundamental Channel F DCCH Forward Dedicated Control Channel F DD Frequency Division Duplex FER Frame Error Rate F FCH Forward Fundamental Channel F PCH Forward Paging Channel F PICH Forward Pilot Channel F QPCH Forward Quick Paging Channel...

Page 202: ...er second MM Mobility Management MMI Man Machine Interface MOC Mobile Originated Call Modem Modulator Demodulator MPU Micro Process Unit MS Mobile Station MSC Mobile Switching Center MT0 Mobile Terminal 0 MTC Mobile Terminated Call MT1 Mobile Terminal 1 MTBF Mean Time Between Failures MTRB Micro bts Transceiver Board MTTR Mean Time To Repair N O OAM Operation Maintenance OEM Original Equipment Man...

Page 203: ...Reverse Pilot Channel R SCCH Reverse Supplemental Code Channel R SCH Reverse Supplemental Channel RSQI Receive Signal Quality Indicator R TCH Reverse Traffic Channel S SCH Supplemental Channel SDH Synchronous Digital Hierarchy SID System Identification SME Signaling Message Encryption SDU Selection Distribution Unit SPU Signaling Process Unit SSSAR Special Service Segmentation and Reassemble STM 1...

Page 204: ...User Manual Airbridge cBTS3612 CDMA Base Station System Description Appendix F Abbreviation F 5 VSWR Voltage Standing Wave Radio ...

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