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ZXG10-BTS

Base Transceiver Station

Technical Manual

Version 2.9

ZTE CORPORATION
ZTE Plaza, Keji Road South,
Hi-Tech Industrial Park,
Nanshan District, Shenzhen,
P. R. China
518057
Tel: (86) 755 26771900 800-9830-9830
Fax: (86) 755 26772236
URL: http: //support.zte.com.cn
E-mail: [email protected]

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Summary of Contents for ZXG10-BTS

Page 1: ...chnical Manual Version 2 9 ZTE CORPORATION ZTE Plaza Keji Road South Hi Tech Industrial Park Nanshan District Shenzhen P R China 518057 Tel 86 755 26771900 800 9830 9830 Fax 86 755 26772236 URL http support zte com cn E mail doc zte com cn ...

Page 2: ...s are disclaimed including without limitation any implied warranty of merchantability fitness for a particular purpose title or non infringement ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on the information contained herein ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering ...

Page 3: ...cy Content Good Fair Average Poor Bad N A Your suggestions for improvement of this documentation Please check the suggestions which you feel can improve this documentation Improve the overview introduction Make it more concise brief Improve the Contents Add more step by step procedures tutorials Improve the organization Add more troubleshooting information Include more figures Make it less technic...

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Page 5: ... System Description 1 System Background 1 Standards Followed 2 Main Functions 3 Working Principles of System 5 Hardware Architecture 6 Software Architecture 9 Controller Maintenance Module CMM 10 FUC 13 CHP 14 CIP 15 System Features 15 Chapter 2 17 Technical Indices 17 Working Band 17 Physical Indices 19 Dimensions Color and Structure 19 Weight of Integrated Equipment and Weight Bearing Requiremen...

Page 6: ...aces and Communications 27 Overview 27 Interfaces 28 Abis Interface 28 Um Interface 31 Inter Rack Cascaded Interface of Same Site 33 Interface with External Environment Monitoring System 34 Interfaces of Tower Amplifier System 34 Man Machine Interface MMI 35 Protocol Overview 35 Um Interface Physical Layer 35 LapD Protocol 48 LapDm Protocol 50 RR MM CM Protocol 53 Chapter 4 55 System Functions 55 ...

Page 7: ...line Software Loading 88 Ultra Distance Coverage 89 Chapter 5 91 Networking Modes and System Configurations 91 Networking Modes 91 System Configuration 93 Number and Types of Sites 93 Base Station Configuration Principles 94 Expansion Configuration 97 Configuration Example 97 Appendix A 107 Normative References 107 Appendix B 109 Abbreviations 109 Appendix C 115 Method for CDU TX Input Crossing Co...

Page 8: ...Figures 121 Tables 123 ...

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Page 11: ...ity Purpose of this Technical Manual The ZXG10 BTS V2 9 Base Transceiver Station Technical Manual introduces the working principles functions and technical features of the ZXG10 BTS V2 9 and gives users a comprehensive idea about the technical features of the ZXG10 BTS V2 9 The complete set of manuals is listed as follows ZXG10 BTS V2 9 Base Transceiver Station Guide to Documentation ZXG10 BTS V2 ...

Page 12: ...or interface protocols of the ZXG10 BTS V2 9 Chapter 4 System Functions describes the system functions of the ZXG10 BTS V2 9 Chapter 5 Networking and System Configuration details various networking modes connections and configurations of the ZXG10 BTS V2 9 Appendix A Normative References introduces the normative references used in this manual Appendix B Abbreviations lists all the abbreviations us...

Page 13: ...y names and function names Optional parameters Mandatory parameters Select one of the parameters that are delimited by it Note Provides additional information about a certain topic Checkpoint Indicates that a particular step needs to be checked before proceeding further Tip Indicates a suggestion or hint to make things easier or more productive for the reader Indicates some supplementary comments ...

Page 14: ...zardous situation which if not avoided could result in death or serious injury Caution Indicates a potentially hazardous situation which if not avoided could result in minor or moderate injury It may also be used to alert against unsafe practices Erosion Beware of erosion Electric shock There is a risk of electric shock Electrostatic The device may be sensitive to static electricity Microwave Bewa...

Page 15: ...e com cn You can also call our customer support center at 86 755 26771900 and 86 800 9830 9830 Documentation Support ZTE welcomes your comments and suggestions on the quality and usefulness of this document For further questions comments or suggestions on the documentation you can contact us by e mail at doc zte com cn or you can fax your comments and suggestions to 86 755 26772236 You can also ex...

Page 16: ...Confidential and Proprietary Information of ZTE CORPORATION xvi This page is intentionally blank ...

Page 17: ...cluding 4 75 5 15 5 90 6 70 7 40 7 95 10 20 and 12 20 They can adaptively change coding rates from terminals and networks respectively according to different channel quality reports which reduce influences caused by fading error of channels data congestion and delay improve voice quallities to the maximum extent In order to implement smooth transition from GSM to 3G the GSM network need provide AM...

Page 18: ...TS V2 9 is the radio transceiver for the GSM BSS It is controlled by BSC and serves in a certain cell BTS is connected to BSC through the Abis interface It helps BSC implement radio resources management radio transmission with MS and relevant control functions through the Um interface In addition it implements the layer 1 and layer 2 protocols on the radio link and related control functions Standa...

Page 19: ...radio interface layer 3 specification GSM04 60 General Packet Radio Service GPRS Mobile Station MS Base Station System BSS interface Radio Link Control Medium Access Control RLC MAC protocol GSM05 02 Multiplexing and multiple access on the radio path GSM05 08 Radio subsystem link control GSM08 58 Base Station Controller Base Transceiver Station BSC BTS interface Layer 3 specification The EMC compl...

Page 20: ...nce TA It supports cells covered with a maximum 120 kilometers in radius It calculates the time advance amount It supports two types of power output 40W and 80W in the bands GSM900 and EGSM900 It supports 40 W output in the GSM1800 GSM1900 and GSM850 bands A single cabinet 40 W supports 12 TRXs and can be expanded to 36 TRXs at the same site One site supports S12 12 12 expansion A single 80 W supp...

Page 21: ...working principle diagram of ZXG10 BTS V2 9 is shown in Figure 2 FI G U R E 2 WO R K I N G PR I N C I P L E DI AG R AM O F ZXG10 BTS V2 9 Controller Maintenance Unit Baseband Processor RF Unit B S C Abis Interface Data Link SystemClock Baseband Modulated Signal RF Demodulation Signal ControlSignal SystemClock RF Signal PowerDistributionUnit 48V or 24VDC Antenna Feeder Processor UmInterface The ZXG...

Page 22: ... fan control modules FCM and power distribution module PDM The hardware architecture of the ZXG10 BTS V2 9 is shown in Figure 3 FI G U R E 3 HAR D W AR E AR C H I T E C T U R E O F ZXG10 BTS V2 9 CMM PDM FCM TRM1 TRM2 TRM12 A E M Um Interface Internal Communication Bus ZXG10 BTS V2 BSC Abis Interface MMI The main functions of each module are as follows 1 CMM CMM implements Abis interface processin...

Page 23: ...s of combiner distribution units i Combiner Distribution Unit CDU CDU supports one 2 in 1 combiner unit and one 1 to 4 distribution unit It has two low noise amplifiers with extended receiving output and one built in duplexer ii Receiver Distribution Unit RDU RDU supports one 1 to 4 distribution unit and has two low noise amplifiers with extended receiving output and one receiving filter iii Combi...

Page 24: ...R M E T R M T R M E T R M T R M E T R M T R M E T R M T R M E T R M T R M E T R M T R M E T R M T R M E T R M T R M E T R M T R M E T R M T R M E T R M A E M A E M A E M A E M C M M C M M P D M 6 3 5 4 2 1 A E M A E M T R M E T R M 6 1 2 3 4 5 6 3 5 4 2 1 Figure 5 shows a fully configured 80 W single cabinet with TRM modules consisting of two types of modules STRU and SPA ...

Page 25: ... development and maintenance The software is distributed on boards There is little correlation between various software The board software is independent in function and associates with each other through the internal interfaces The core software can be downloaded from the background facilitating service upgrade and version maintenance It also provides external interfaces through which the softwar...

Page 26: ...G10 BTS V2 9 System Software CMM FUC CHP CIP Controller Maintenance Module CMM CMM is the control maintenance module of the ZXG10 BTS V2 9 Its main functions are as follows BTS status management BTS configuration management BTS equipment management BTS monitoring management BTS test management BTS database management Supporting local operation and management O M function including local parameter ...

Page 27: ...provides consistent operation interfaces for the specific details of the upper level encapsulated hardware equipment and simplifies the OSS design 3 pSOS operating system It is a real time multi task operating system for commercial purposes and with superior performance The operating system has been successfully applied to the next generation BTS 4 Operation support system OSS layer in particular ...

Page 28: ...They all communicate in a point to point way There are three types of communication links CCComm CMComm and CTComm CCComm The CCComm is the auxiliary communication link between the master CMM of the master rack and that of the slave rack Physically it is a 2 M PCM line which facilitates the centralized data collection of LMU CMComm As the communication link between the active CMM and the standby C...

Page 29: ...iagnosis and test to rapidly locate faults FUC FUC Frame Unit Controller The FUC software module is located in the TPU of the TRM module It processes the radio signaling over every radio carrier and signaling on the BSC interface and manages all channels Its major functions are as follows 1 Responsible for processing and converting GSM signaling protocols including the layer 2 protocol LAPD with B...

Page 30: ...e drivers are also designed with a hierarchical structure including equipment dependent and equipment independent drivers All communications within the current equipment adopt the address transfer mode to reduce the overhead of the memory block copies The application layer contains the operation and maintenance module OAMM radio signaling processing module RSM and local O M agent module LMA The OA...

Page 31: ...nd flexible configuration It meets GSM specification requirements and can be configured as required by users It supports GPRS EDGE data service functions and AMR voice service It supports multiple bands mixed insertion of modules of different bands and mixed insertion of modules of different services It supports 40 W and 80 W configurations Frequency hopping is supported 3 Large capacity A single ...

Page 32: ... reliable power supply system The primary power supply supports 48 V supply the secondary power supply with a distributed design is integrated in various modules improving the reliability of the system 9 Perfect environment monitoring capability Providing inputs for 10 pairs of external environment trunk nodes and outputs for 8 pairs of trunk nodes 10 Good heat design A fan layer is designed on th...

Page 33: ...cy range 890 MHz 915 MHz Downlink transmitted by BS and received by MS frequency range 935 MHz 960 MHz ii Extended 900 MHz band Uplink transmitted by MS and received by BS frequency range 880 MHz 915 MHz Downlink transmitted by BS and received by MS frequency range 925 MHz 960 MHz iii 850MHz band Uplink transmitted by MS and received by BS frequency range 824 MHz 849 MHz Downlink transmitted by BS...

Page 34: ...24 n is a channel number or an ARFCN Absolute Radio Frequency Channel Number ii Extended 900 MHz band The channel number is in the range of 0 124 and 975 1023 There are 174 frequency bands in all The relationship between the channel numbers and frequency band nominal central frequency is illustrated as follows Fu n 890 0 2 n MHz 0 n 124 Fu n 890 0 2 n 1024 MHz 975 n 1023 Fd n Fu n 45 MHz iii 850 M...

Page 35: ... transceiving interval is 45 MHz ii Extended 900 MHz band The duplex transceiving interval is 45 MHz iii 850 MHz band The duplex transceiving interval is 45 MHz iv 1 800 MHz band The duplex transceiving interval is 95 MHz v 1 900 MHz band The duplex transceiving interval is 80 MHz Physical Indices Dimensions Color and Structure Rack dimensions H W D excluding the base 1 600 mm 600 mm 550 mm H W D ...

Page 36: ...5 W CMM 16 W Fan 60 W CDU or RDU 5 W The power consumption of the integrated equipment in full configuration is less than 2 200 W Heat in the rack is from the TRM and AEM in the carrier plug in shelf The heat consumption distribution of each module TRM 120 W ETRM 135 W AEM 45 W CMM two 20 W Fan and other parts 30 W Under full configuration Without ETRM the heat consumption of each carrier shelf 60...

Page 37: ...circuit boards and other components from aging and deforming The average illumination should be 300x 450lx and no glare should exist Air Pollution Erosive gases smog and smoking are prohibited in the equipment room Interface Indices Abis Interface Indices The Abis interface adopts the standard E1 interface The performance of the Abis interface meets the requirements specified by ITU T G 703 and IT...

Page 38: ...minal bit rate 2 048 Kbit s 2 5 5 that is when it is 51 2 Kbit s 102 4 Kbit s echo attenuation 12 dB Corresponding to the nominal bit rate 2 048 Kbit s 5 100 that is when it is 102 4 Kbit s 2 048 Kbit s echo attenuation 18 dB Corresponding to the nominal bit rate 2 048 Kbit s 100 150 that is when it is 2 048 Kbit s 3072 Kbit s echo attenuation 14 dB Um Interface Indices Main indices are as follows...

Page 39: ...iant with GSM 11 21 and GSM 05 05 vi The inter modulation attenuation in BSS Compliant with GSM 11 21 and GSM 05 05 vii Transmitted adjacent channel power Compliant with GSM 11 21 and GSM 05 05 viii Spurious emission of the transmitter Compliant with GSM 11 21 and GSM 05 05 4 Performance of the transmitter i The static layer 1 function of the transmitter nominal error rate The static first layer f...

Page 40: ...to test the capability that the BSS transmitter receives the GSM modulation signal when interferential signal exists Compliant with GSM 11 21 and GSM 05 05 vi Inter modulation suppression This index is for measuring the linear degree of the RF part of the transmitter It indicates when two or multiple unexpected signals which are relative to the expected signal in frequency exist the transmitter s ...

Page 41: ...1 10 9 day Initial maximum frequency bias 1 10 7 Reliability Indices MTBF Mean Time Between Failure hour 6 3 104 hours Mean Time To Repairs MTTR 0 57 hours Availability ratio A 99 9991 Annual average interruption time of the system hour 0 080 hours The product successfully passed the CE certification The personal safety electromagnetic security EMC and guarantee of the wireless frequency spectrum ...

Page 42: ...ZXG10 BTS V2 9 Technical Manual 26 Confidential and Proprietary Information of ZTE CORPORATION This page is intentionally blank ...

Page 43: ...positions of the main interfaces of the ZXG10 BTS V2 9 in the system FI G U R E 9 EX T E R N AL IN T E R F AC E PO S I T I O N S O F ZXG10 BTS V2 9 BTS BTS BSC LMT MS MS External Monitoring System Um Interface AbisInterface MMI Interface Tower Amplifier System TowerAmplifier SystemInterface M Interface B Interface Apart from the Abis and Um interfaces the ZXG10 BTS V2 9 has the cascaded interface ...

Page 44: ...nterface is defined as an interface between BSC and BTS The Abis interface sends the signal from the BSC to the BTS usually the standard E1 signal of PCM 2M The unbalanced input mode of 75 ohm coaxial cable is adopted for it to implement access through the transmission equipment digital microwave fiber transmission SDH and PDH and satellite link Physically an E1 interface is adopted as the Abis in...

Page 45: ...radio resources The protocols related to the Abis interface are as follows GSM 08 52 presents the basic principles and rules of other specifications for the Abis interface and how the service functions are divided between BSC and BTS GSM 08 54 specifies the physical structure of the Abis interface GSM 08 56 specifies the data link layer protocol for the Abis interface GSM08 58 stipulates the layer...

Page 46: ...TCH3 TS12 TCH4 TCH5 TCH6 TCH7 TS12 TCH4 TCH5 TCH6 TCH7 TS13 TCH0 TCH1 TCH2 TCH3 TS13 TCH0 TCH1 TCH2 TCH3 TS14 TCH4 TCH5 TCH6 TCH7 TS14 TCH4 TCH5 TCH6 TCH7 TS15 TCH0 TCH1 TCH2 TCH3 TS15 TCH0 TCH1 TCH2 TCH3 TS16 TCH4 TCH5 TCH6 TCH7 TS16 TCH4 TCH5 TCH6 TCH7 TS17 TCH0 TCH1 TCH2 TCH3 TS17 TCH0 TCH1 TCH2 TCH3 TS18 TCH4 TCH5 TCH6 TCH7 TS18 TCH4 TCH5 TCH6 TCH7 TS19 FUL TS19 TCH0 TCH1 TCH2 TCH3 TS20 FUL TS...

Page 47: ...terface of CMM in each rack The CMM will identify the O M signaling according to TEI EAM will be transparently transmitted by the main rack 3 In the uplink direction in the same site the service TCH is transmitted transparently the TRM signaling FUL in the same rack is compressed and packed in the CMM the O M timeslot is multiplexed based on TEI and the EAM timeslot is transmitted transparently in...

Page 48: ...ervice On the Um interface the circuit service protocols fall into three layers The first layer is the physical layer and also the underlying layer It consists of various channels and provides the basic wireless channels for upper level message transmission The second layer is the data link layer and also the medium layer with the LapDm adopted It comprises various data transmission structures and...

Page 49: ...rvice signaling and TRM signaling will be transparently transmitted while O M and FN will be transmitted via the time division HDLC link The inter rack data interface format is shown in Figure 14 FI G U R E 14 IN T E R R AC K DAT A IN T E R F AC E S I N S I D E A SI T E Inter rack Downlink Interface Inter rack Uplink Interface 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 TS0 SYNC TS0 SYNC TS1 CC_COM TS1 CC_COM...

Page 50: ...sed on RS232 and the other is in the communication mode that directly reflects the alarm status in the backbone node mode The DB25 pin socket is adopted at the rack top of the ZXG10 BTS V2 9 to access the backbone node alarm status signal The CMM can collect 10 pairs of backbone nodes for input and provide two pairs of backbone nodes for output in the ZXG10 BTS V2 9 In addition it provides one RS2...

Page 51: ...e of the CMM panel Protocol Overview For the ZXG10 BTS V2 9 there are two important external interfaces Abis interface and Um interface The LapD LapDm and RR MM CM protocols are processed on the two interfaces The three protocols are discussed in light of the actual system conditions Um Interface Physical Layer Timeslot The multiple access technology enables several subscribers to share one channe...

Page 52: ... R AM O F T H E FR AM E ST R U C T U R E 0 0 0 0 0 0 1 1 1 1 1 1 2 2 2 2046 2047 24 25 24 25 49 49 50 50 48 3 4 5 6 7 1 Hyper Frame 2048 Super Frames 2715648 TDMA Frame 1 Super Frame 1326 TDMA Frames 1Multiframe 26TDMA Frames 120ms 1Multiframe 51TDMA Frames 3060 13 ms 1TDMA Frame 8BP 120 26 ms TCH SACCH T FACCH BCCH CCCH SDCCH The GSM circuit service has two kinds of multi frames 26 frame multi fr...

Page 53: ... P T C C H I I d le Fra m e The multiframe structure of PDCH contains 12 blocks each consisting of four consecutive TDMA frames There are also two idle TDMA frames and another two for the Packet Time advance Control CHannel PTCCH making a total of 52 TDMA frames In the packet service the basic composition unit of all packet logical channels except the PRACH Packet Random Access Channel and PTCCH U...

Page 54: ...ronization channel carrying identification information of MS frame synchronization and BTS Base Transceiver Station BCCH Broadcasting control channel used to send cell information In every BTS there is always a transceiver with such a channel to broadcast system information to all MSs in this cell ii Common control channel As a point to multipoint bi directional CCH CCCH is shared by MSs in the ne...

Page 55: ...d as TACH F 3 Channel Combination In practice logic channels of different types are usually mapped to the same physical channel which is called channel combination Following are nine channel combinations i TCHFull Traffic CHannel Full rate TCH F FACCH F SACCH TF ii TCHHalf Traffic CHannel Half rate TCH H 0 1 FACCH H 0 1 SACCH TH 0 1 iii TCHHalf2 Traffic CHannel Half rate 1 TCH H 0 0 FACCH H 0 1 SA...

Page 56: ...ink 8 SDCCH 8 Downlink 8 SDCCH 8 Uplink BCCH CCCH 4SDCCH 4 Downlink BCCH CCCH 4SDCCH 4 Uplink a FCCH SCH BCCH CCCH b SDCCH 8 0 7 SACCH C8 0 7 c FCCH SCH CCCH SDCCH 4 0 3 SACCH C4 0 3 For the half rate voice channel combination each timeslot has two half rate sub channels and corresponding SACCH with 26TDMA frames as the multi frame The frame structure is shown in Figure 19 FI G U R E 19 ST R U C T...

Page 57: ...CHs at the same time PDTCH U is used by MS to send packet data to the network and PDTCH D is used by the MS to receive packet data from the network 2 PCCH PCCHs are listed in Table 4 TAB L E 4 PCCH Name Classification Packet random access channel PRACH uplink Packet paging channel PPCH downlink Packet access granted channel PAGCH downlink Packet Common Control Channel PCCCH Packet notification cha...

Page 58: ...presented iii Packet dedicated control channel The PACCH transmits signaling information such as confirmation and power control It also carries resource allocation and reallocation messages which can be used to allocate PDTCH capacity or add new PACCH in the future When an MS is making packet transmission it can page via PACCH and enter the circuit switching mode The PACCH is dynamically allocated...

Page 59: ... B10 B11 23 52 multiframe number n 5 uplink TAI 10 TAI 11 downlink TA message 3 TA message 3 B0 B1 B2 16 B3 B4 B5 17 B6 B7 18 B9 B10 B11 19 52 multiframe number n 4 uplink TAI 8 TAI 9 downlink TA message 3 TA message 3 B8 downlink TA message 1 TA message 1 B0 B1 B2 0 B3 B4 B5 1 B6 B7 B8 2 B9 B10 B11 3 52 multiframe number n uplink TAI 0 TAI 1 B0 B1 B2 4 B3 B4 B5 5 B6 B7 B8 6 B9 B10 B11 7 52 multif...

Page 60: ...use the BX 1 if X 11 or B0 if X 11 uplink block in the PDCH If the network permits the MS can also use three consecutive blocks In the downlink the MS reads every downlink block in the allocated PDCH and judges whether the block belongs to itself according to TFI the ID allocated to the MS Burst Pulse Sequence Burst pulse sequence refers to the information bit stream sent by the BTS or MS in any T...

Page 61: ...high quality demodulation These eight different types of training sequences are used by the adaptive equalizer circuit at the receiving end as a reference for delay compensation TSC Training Sequence Code ranges from 0 to 7 representing 8 different types of training sequences As for broadcasting and control channels TSC should be equal to the BCC BS Color Code Training sequence bits from BN61 BN62...

Page 62: ...TY P E S GP 68 25 GP 8 25 GP 8 25 GP 8 25 1 2 3 4 5 6 7 0 1 TDMA Frame 8 BP 120 26 ms TB 3 Encryption Information Bit 58 Training Sequence 26 Encryption Information Bit 58 TB 3 TB 3 Fixed Bit 142 TB 3 TB 3 Encryption Information Bit 39 Training Sequence 64 Encryption Information Bit 39 TB 3 TB Synchronization Sequence 41 Information Bit 36 TB 3 TB Tail Bit GP Guard Period Normal Burst NB Frequency...

Page 63: ... the carrier frequency of the MS All its 148 bits are set to 0 so that the modulated signal will be a pure sine wave with its frequency higher than the carrier 1625 24kHz or about 67 7 kHz 5 Dummy burst Dummy burst pulse sequence DB is chiefly used to fill in vacancies and its format is exactly the same as that of NB For the 26 bits of the training sequence of DB the three tail bits at the beginni...

Page 64: ...ock contains an RLC MAC control message LapD Protocol LapD link access procedure of D channel is a data link procedure for signaling transmission between BTS V2 9 and BSC with the purpose of using the D channel to transmit messages between respective Layer 3 entities LapD is a point to multipoint communication protocol that employs the frame structure In ZXG10 BTS V2 9 LapD implements the followin...

Page 65: ...onfigures the parameters such as TEI and values of the timer necessary for the LapD module to run The LapD module provides the FURRM with two information transmission modes I frame multi frame operation and UI frame operation 1 I frame multi frame operation The L3 message is sent in the information frame mode which requires the confirmation from the receiver This mode provides a whole set of contr...

Page 66: ... end FCS Frame Check Sequence is used for error code detection Flag is the beginning and the end token of a frame namely an 8 bit font containing six consecutive 1s 2 UI frame operation The L3 message is sent in the no serial number frame mode and the receiver is not required to send the received confirmation after receiving the UI frame This operation mode does not provide a flow control or error...

Page 67: ...the RACH channel access is instantly assigned In the ZXG10 BTS V2 9 LapDm is implemented in the LapDm module of RSL The position of LapDm module in RSL is shown in Figure 27 FI G U R E 27 LAP DM MO D U L E LapDModule OAMM FURRM PhysicalLayer The LapDm module communicates with the physical layer and L3 The L3 protocol is processed in FURRM OAMM configures the value of the timer necessary for LapDm ...

Page 68: ...tes This difference is because each SACCH block has two special bytes Time advance amount and transmitting power control Since the maximal length of the frame on the radio interface is of 21 or 23 bytes which cannot meet the need of most signaling segmentation and regrouping need to be defined in LapDm Thus an additional bit is used to distinguish the last packet frame from other frames Thanks to ...

Page 69: ...a call it further includes CC Call Control SSM Subjoin Service Management and SMS Short Message Service 2 MM layer Mobility and security management that is the necessary processing when the MS initiates location update 3 RR layer Radio resource management including establishing and releasing connection between the MS and MSC during the call process In the ZXG10 BTS V2 9 the radio resource manageme...

Page 70: ...parameter control and performance monitoring thus ensuring normal communication services It divides the managed objects into four types radio link layer dedicated channel control channel and transceiver The message structure of L3 on the Abis interface is shown in Figure 31 FI G U R E 31 ME S S AG E ST R U C T U R E O F L3 O N T H E AB I S IN T E R F AC E Message discriminator T Type Channel numbe...

Page 71: ...d implement the operation and maintenance functions of the BSS BTS has the following four major functions to implement the above service functions 1 RF function Implementing the radio connection between MS and BS 2 Baseband processing function Providing voice coding transcoding and rate adaptation 3 Signaling processing function Based on the BSC instructions controlling the establishment connectio...

Page 72: ... generated from the RF part are reported to OMCR so that the operators at the background can control the operation of the RF part and know about the operation statuses Diversity Receiving The BTS provides the diversity receiving function The diversity receiving is implemented by two sets of independent receiving equipment working at the same time The receiving equipment includes the antenna tower ...

Page 73: ...lifier and minimize the transmitter interference Baseband Processing The baseband processing implements the function of the physical layer on the Um interface processing all full duplex channel baseband data on one TDMA frame In the downlink direction the baseband processing involves rate adaptation channel coding and interweaving encryption and generation of TDMA burst pulse In the uplink directi...

Page 74: ...his procedure the BSC requests the BTS to forward a Um interface L3 message transparently in the acknowledgment mode 6 Transparent receiving procedure of the Um interface L3 message in the acknowledgment mode With this procedure the BTS instructs the BSC to receive a Um interface L3 message transparently in the acknowledgment mode 7 Transparent forwarding procedure of the Um interface L3 message i...

Page 75: ...s been established on the wireless path During the paging the GSM04 08 message PAGING RESPONSE will be contained in DL_EST_IND and sent to the BTS After the FURRM module sends the EST IND message if the current channel is the TCH activated in the service mode the synchronization timer will be enabled to wait for the synchronization between CHP and TC If the synchronization is not implemented till ...

Page 76: ... in Figure 34 FI G U R E 34 LI N K ES T AB L I S H I N G FAI L U R E MS LAPDm FURRM HPIMa LAPD BSC OAMM Dm_DL_EST _REQ DL_DATA_IND EST REQ EST REQ SABM Dm_DL_REL_IND DL_DATA_REQ REL IND REL IND Dm_MDL_ERR _IND ERR IND DL_DATA_REQ ERR IND When the link connection fails the FURRM will receive the Dm_DL_REL_IND and Dm_MDL_ERROR_IND primitives from the data link layer and the latter one will record th...

Page 77: ... link layer connection has been released on the wireless path If the link layer is in idle mode the BTS returns DM frame to MS but not notifies the BSC The releasing procedure required by a BSC is shown in Figure 36 FI G U R E 36 LI N K RE L E AS I N G PR O C E D U R E RE Q U I R E D B Y A BSC MS LAPDm FURRM HPIMan LAPD BSC OAM Dm_DL_REL_REQ DL_DATA_IND REL REQ REL REQ DISC UA or DM Dm_DL_REL_CO N...

Page 78: ...T200 expires the DISC will be resent and the resending times will increase by one If the failure persists the Dm_DL_RELEASE_INDICATION and MDL_ERROR_INDICATION primitives from the data link layer will be received in L3 The latter primitive records the failure cause Timer T200 expires for N200 1 times Execution released abnormally Sending and Receiving of Transparent L3 Message in Acknowledgment Mo...

Page 79: ... DATA IND DATA IND I frames RR frames The BSC transfers to the BSC with the acknowledgment mode L3 transparent message that is received from MS The DATA IND message contains the complete acknowledgment mode L3 transparent message Transmission and Receiving of Transparent L3 Message in Non Acknowledgment Mode The procedure of transmitting a L3 transparent message from the BSC is shown in Figure 40 ...

Page 80: ...nment command or handover command 2 Channel mode change procedure With this procedure the BSC requests the BTS to change the mode of an activated channel 3 Handover detection procedure This procedure is used by the target BTS and target BSC to detect the access of a handed over MS 4 Start encryption procedure This procedure is used to start the encryption procedure stipulated by the TS GSM 04 08 5...

Page 81: ...channel which usually occurs before a channel change is decided This procedure is optional 12 SACCH fill in information change procedure With this procedure the BSC instructs the BTS to change the fill in information system message on a specific SACCH Channel Establishment 1 Channel activation The procedure of activating a channel successfully is shown in Figure 42 FI G U R E 42 CH AN N E L AC T I...

Page 82: ...adaptation frequency hopping sequence key etc If there is encrypted information it uses the encryption activation mode When the FURRM module receives the CHAN ACTIV message it sends related information unit activation reason etc contents to the CHP for processing through the HPIMan module and reports the results to the BSC when the response arrives When the channel is activated the TRX responds wi...

Page 83: ...the BSC enables the new channel activation procedure The CHAN ACTIV message sent to the TRX contains Handover Reference which will be used to detect the Handover Access message from MS When the channel for handover is activated the FURRM uses the CHP RET NORM ACTIV message to notify the CHP to resume the normal mode The FURRM should save the Handover Reference in the CHAN ACTIV message to compare ...

Page 84: ... MS in non acknowledgement mode on the active signaling channel and starts T3105 at the same time If T3105 expires before a correct decoding frame is received the message will be resent If no correct decoding frame is not received when the message has been resent for Ny1 times the BTS will send to the BSC a CONNECTION FAILURE message with the cause Handover access failed When the message is receiv...

Page 85: ... MODE MODIFY MPH_CHPIndToRR CHP MODE MODIFY RESP DL_DATA_REQ MODE MODIFY ACK DATA REQ CHAN MODE MODIFY DL_DATA_IND DATA REQ CHAN MODE MODIFY Dm_DL_ DATA_REQ CHAN MODE MODIFY CHAN MODE MODIFY DL_DATA_REQ DATA REQ CHAN MODE MODIFY ACK DL_ DATA_IND CHAN MODE MODIFY ACK DATA REQ CHAN MODE MODIFY ACK Set Timer MPH_CHPIndToRR CHP SYNCHRONIZED DL_DATA_REQ CONN FAIL IND kill Timer CONN FAIL IND The failed...

Page 86: ...change the mode for some reasons it returns a MODE MODIFY NACK message If the response message indicates the successful mode change and the TCH channel changes into the service mode the FURRM starts the timer to wait for the CHP SYNCHRONIZED message for the synchronization between CHP and TC If the message is not received when the timer expires it sends the CONN FAIL IND message to the BSC At the ...

Page 87: ...l The BSC commands the BTS activation through a simple request acknowledgement procedure see the CHAN ACTIV and CHAN ACTIV ACK of the access procedure Once the BTS is activated the BSC commands the MS to perform channel change through the RR ASSIGNMENT COMMAND message When the MS changes its settings according to the new information and establishes a new signaling link the MS sends a RR ASSIGNMENT...

Page 88: ...D is received the TRX sends the RR CIPH MODE CMD to the MS in the non encryption mode and begins the decryption at the same time the CHP implements this operation The BTS at this time actually sends configurations in the old mode and receives configurations in the new mode When the MS receives the RR CIPH MODE CMD it will be configured into the complete new mode and sends the RR CIPH MOD COM to th...

Page 89: ...CH in the BTS according to the RR CHANNEL RELEASE procedure When the BSC sends the RR CHANNEL RELEASE it sends the DEACT SACCH message to the BTS to command the BTS to stop transmitting the downlink SACCH frame The FURRM module sends the related information in the DEACT SACCH message to the CHP for processing 2 Wireless channel release The wireless channel release procedure is shown in Figure 50 F...

Page 90: ...very two SACCH blocks 960 ms The TRX measures the level and quality of the received signals in the current uplink channel The average time is the period of one SACCH block The RR MEASurement REPort message that is sent by the MS to the BTS contains the measurement results for the dedicated channel and adjacent cells The BTS and MS measurement results form basic original data that must be transmitt...

Page 91: ...port preprocessing is shown in Figure 52 FI G U R E 52 ME AS U R E M E N T RE P O R T PR E P R O C E S S I N G MS LAPD FURRM HPIMa LAPD BSC OAMM Dm_DL_UNIT DATA_REQ MEAS REP MEAS REP DL_DATA_REQ PREPROC MEAS RES PREPROC MEAS RES MPH_CHPIndToRR CHP MEAS IND CHP SET TA The BTS first preprocesses the MS measurement report and then sends it together with the BTS measurement result to the BSC through t...

Page 92: ...Ma LAPD BSC OAMM BS POWER CONTROL DL_DATA_IND BS POWER CONTROL MPH_RRCmdToC HP CHP SET BS POWER This optional procedure can have the BSC set the TRX transmission power level or the parameter that the TRX uses to control the TRX transmission power The initial parameters are set in the CHAN ACTIV message by the BSC If these parameters are to be changed the BSC will send the BS POWER CONTROL message ...

Page 93: ... procedure of modifying the SACCH fill in information is shown in Figure 56 FI G U R E 56 PR O C E D U R E O F MO D I F Y I N G SACCH FI L L I N IN F O R M AT I O N MS LAPDm FURRM HPIMan LAPD BSC OAMM DL_ DATA_IND SACCH INFO MODIFY SACCH INFO MODIFY MPH_RRCmdToCHP CHP SET STOP SACCH INFO SYS INFO TYPE 5 6 5bis 5ter The BSC instructs the BTS that the new system message RR System Information Type 5 ...

Page 94: ...s procedure the BTS gives the BSC an indication that an immediate assignment message is deleted due to overload on the AGCH 5 CCCH overload indication procedure With this procedure the BTS indicates to the BSC the load of the specified CCCH 6 Broadcast information change procedure With this procedure the BSC indicates to the BTS the new system messages broadcast on the BCCH 7 Short message cell br...

Page 95: ...ate assignment message and where the paging mode unit is set as unchanged When this message is received the FURRM sends it to the PAGCHMan sub module of the PAGCHM module That sub module places the message in the buffer When the trigger is received from the ISR the PAGCHDaemon sub module of the PAGCHM module forms the messages in the waiting queue into the RR IMMEDIATE ASSIGNMENT EXTENDED or RR IM...

Page 96: ...ated channel combination that is indicated to the MS and will be used for follow up processing The RR PAGing REQuest type 1 2 3 messages are buffered by the PAGCHMan sub module of the PAGCHM module The PAGCHDaemon sub module combines and sends them and calculates the correct DRX paging message arrangement paging block to correctly transmit them When the MS receives the RR PAGing REQuest message an...

Page 97: ... with the SMS BROADCAST REQ or SMS BROADCAST CMD message In these two messages the BSC considers the CBCH capacity and then queues repeats and transmits the messages The BSC also splits the SMS Cell Broadcast message on the air interface The difference between the two messages is that the SMS BROADCAST CMD message can request broadcasting of a complete cell broadcast message sent in every message ...

Page 98: ...m message sending the TRU panel of the BTS has a signal indicator marked as MOD System Information Type 1 contains the RACH control parameter and cell configurations and System Information Type 2 contains the RACH control parameter and BCCH configurations of adjacent cells The System Information Type 2bis and System Information Type 2ter are optional messages containing the BCCH extended configura...

Page 99: ...n Type 5bis and System Information Type 5ter contain adjacent cell BCCH extended configuration information The System Information Type 6 contains the location area ID and cell ID When the fill in information uploaded in the SACCH needs to be changed the BSC will send a SACCH INFO MODIFY message to the BTS The SACCH fill in information in this message will be transmitted in the specified channel ti...

Page 100: ... 102 frames 51 multiframes or 104 frames 26 multiframes Load Management 1 Load indication The procedure of load indication on the common channel is shown in Figure 66 FI G U R E 66 PR O C E D U R E O F LO AD IN D I C AT I O N O N PU B L I C CH AN N E L MS PAGCHM FURRM HPIMa LAPD BSC OAMM DL_ DATA_REQ CCCH LOAD IND MPH_CHPIndToRR CHP RACH LOAD IND CCCH LOAD IND PAG_DATA_IND PAG PCH LOAD IND DL_ DAT...

Page 101: ... provided by the CHP Error Indication The procedure of error indication is shown in Figure 67 FI G U R E 67 ER R O R IN D I C AT I O N MS LAPD FURRM HPIMa LAPD BSC OAMM Dm_MDL_ERROR _IND DL_DATA_REQ ERROR IND ERROR IND The ERROR IND message that is sent from the BTS to the BSC indicates to the BSC that the following abnormities happen in the radio data link layer The ERROR IND message contains the...

Page 102: ...3 Others The CHP module will report the error to the FURRM module In addition in case of failed handover or mis synchronization between CHP and TC the FURRM also sends this message to the BSC Error Report The BTS sends the ERROR REPORT message to the BSC notifying the following errors that cannot be reported with other procedures When the BTS receives the error message it ignores the message and r...

Page 103: ...interface of the CMM software The CMM configuration process processes the configuration messages and implements the BTS static data configuration by the BSC The CMM software distributes the BSC parameters and through the HDLC configures the data to the TRM board FUC software that is managed by the CMM software After receiving the configuration message from the CMM software the FUC software configu...

Page 104: ...arms and its own alarms to the CMM software The alarms of the backbone nodes are collected by the CMM software which reports all alarms of this site to BSC through LapD and implements some relevant alarm processing such as power amplification shut down Online Software Loading It supports the BTS software online loading by the BSC The software loading flow is shown in Figure 71 FI G U R E 71 SO F T...

Page 105: ... TA is 63 Some application cases however require a coverage radius of larger than 35 km i e time advance is greater than 63 such as ocean and islands desert and rare route area When the coverage radius is larger than 35 km the MS should support a time advance 63 However the GSM900 MS can only recognize the time advance of up to 63 It is impractical to upgrade the great number of existing MSs so th...

Page 106: ...xtended Channel Figure 74 shows an extended carrier As shown in the figure the original TRX can provide eight physical channels but the number of physical channels is reduced by half after the channels are extended FI G U R E 74 TH E AC T U AL NU M B E R O F PH Y S I C AL CH AN N E L S I N A CAR R I E R 0 0 3 2 1 1 2 3 4 5 6 7 O riginalT RX Extended C hannel TRX With extended channels the coverage...

Page 107: ...orking modes Star chain and tree networking 1 Star networking mode The star networking mode of the ZXG10 BTS V2 9 is shown in Figure 75 FI G U R E 75 ST AR NE T W O R K I N G MO D E O F ZXG10 BTS V2 9 B S C SITE0 SITE1 SITEn Each line represents a bidirectional E1 line The specific ID DIP switch at the site should be set based on the actual configuration In star networking n E1 PCM links are led i...

Page 108: ...tworking mode is applicable to stripe like areas with a small population thus saving a large number of transmission devices To prevent the clock performance deterioration it is recommended no more than four BTSs be cascaded in the chain networking mode 3 Tree networking mode The tree networking mode of the ZXG10 BTS V2 9 is shown in Figure 77 FI G U R E 77 TR E E NE T W O R K I N G MO D E SITE3 SI...

Page 109: ...ach other with one cellular system Figure 78 illustrates the structure FI G U R E 78 CE L L S I N A CE L L U L AR SY S T E M C ell1 C ell3 C ell4 C ell2 C ell5 C ell6 C ell7 C ell9 C ell8 A B In the system each cellular cell is covered by multiple radio channels If an omni antenna is employed a base station will be set at the center of each cell as A in the diagram And if a directional sectorized ...

Page 110: ...he rack are shown in Figure 80 FI G U R E 80 CAR D LAY O U T O F T H E CAR R I E R FR AM E O F ZXG10 BTS V2 9 F O R 40 W CO N F I G U R AT I O N Fan Layer CMM CMM PDM Fan Layer Fan Layer T R M T R M T R M T R M T R M T R M T R M T R M T R M T R M T R M T R M A E M A E M A E M A E M A E M A E M For 40 W configuration a single rack of BTS can be configured with a maximum of 12 transceiver modules Fo...

Page 111: ...S T R U S P A A E M A E M A E M A E M A E M A E M S P A S P A S T R U S T R U Configuration of Carrier Frame Configuration of the carrier frame is listed in Table 6 TAB L E 6 CAR R I E R FR AM E CO N F I G U R AT I O N No Unit Name Configuration Description 1 Transceiver module TRM 1 4 TRXs A carrier shelf can be configured with up to 4 carriers depending on the actual requirements TRMs include 90...

Page 112: ...tional antenna An omni antenna can provide omni directional coverage thus saving site construction costs However the omni antenna has low gain and poor anti interference capability The directional antenna is of directivity with high gain and strong anti interference capability To ensure the complete coverage of a service area combination of multiple antennas is required The number of configured ca...

Page 113: ...th as fewer racks as possible For 40 W PA configuration ZXG10 BTS V2 9 can be configured as a S12 12 12 type site at maximum and for 80 W PA configuration ZXG10 BTS V2 9 can be configured as a S6 6 6 type site at maximum Configuration Example The ZXG10 BTS V2 9 has multiple configuration modes with different combinations and all configurations are based on the user requirements and network plannin...

Page 114: ...n 80W FI G U R E 83 LO G I C AL CO N N E C T I O N RE L AT I O N S H I P BE T W E E N T H E CO M B I N E R UN I T S AN D DI S T R I B U T I O N UN I T S O F T H E O1 TY P E SI T E CDU TX RX TRM1 RDU RX TX1 TX2 RX1 RX2 RX3 RX4 RX1 RX2 RX3 RX4 TX RX RXD Figure 84 illustrates the configuration of the O2 type site Generally the O2 type site is configured with 2 CDUs and 2 omni directional receiving an...

Page 115: ... R M T R M S P A S T R U S P A S T R U O 2 typeSite C onfiguration 80 W FI G U R E 85 LO G I C AL CO N N E C T I O N RE L AT I O N S H I P BE T W E E N T H E CO M B I N E R UN I T S AN D DI S T R I B U T I O N UN I T S O F O2 TY P E SI T E TX RX TRM1 TX RX RXD TRM2 TX RX RXD CDU TX1 TX2 RX1 RX2 RX3 RX4 CDU TX1 TX2 RX1 RX2 RX3 RX4 TX RX Figure 86 illustrates the configuration of the O4 type site Ge...

Page 116: ...n the combiner units and distribution units is shown in Figure 87 FI G U R E 86 CO N F I G U R AT I O N MO D E O F O9 TY P E SI T E FanLayer CMM CMM PDM CMM CMM PDM O 4 typeSite C onfiguratio 40W C D U C D U C D U C D U T R M T R M T R M T R M S P A S T R U S P A S T R U S P A S T R U S P A S T R U FanLayer FanLayer O 4 typeSite C onfiguratio 80W ...

Page 117: ...R I B U T I O N UN I T S O F O4 TY P E SI T E TX RX TX RX TRM1 TX RX RXD TRM2 TX RXRXD TRM4 TX RXRXD CDU TX1 TX2 RX1 RX2 RX3 RX4 CDU TX1 TX2 RX1 RX2 RX3 RX4 TRM3 TX RXRXD Figure 88 illustrates the configuration of the O6 type site Generally the O6 type site is configured with 2 CDUs 2 CEUs and 2 omni directional receiving antennas The logical connection relationship between the combiner units and ...

Page 118: ...N F I G U R AT I O N MO D E Fan Layer CMM CMM PDM CMM CMM PDM O6 type Site Configuration 40W C D U C E U C D U C E U T R M T R M T R M T R M S P A S T R U S P A S T R U S P A S T R U S P A S T R U C E U C D U T R M T R M S P A S T R U S P A S T R U C E U C D U Fan Layer Fan Layer Fan Layer Fan Layer O6 type Site Configuration 80W ...

Page 119: ...3 TRM4 TX RX TRM5 TRM6 CEU TX1 TX2 RX1 RX2 RX3 RX4 TX3 TX4 OTX1 OTX2 EX1 EX2 CDU TX1 TX2 RX1 RX2 RX3 RX4 EX1 EX2 CDU TX1 TX2 RX1 RX2 RX3 RX4 EX1 EX2 CEU TX1 TX2 RX1 RX2 RX3 RX4 TX3 TX4 OTX1 OTX2 EX1 EX2 TX RX RXD TX RX RXD TX RX RXD TX RX RXD TX RX RXD TX RX RXD Figure 90 illustrates the configuration of the O8 type site The O8 type site is configured with two CDUs two RDUs and two omni antennas T...

Page 120: ...G I C AL CO N N E C T I O N RE L AT I O N S H I P BE T W E E N T H E CO M B I N E R UN I T S AN D DI S T R I B U T I O N UN I T S O F T H E O8 TY P E SI T E T X R X T X R X T R M6 TX RXRXD C D U TX1 TX2 RX1 RX2 RX3 RX4 EX 2 EX1 C E U T X1TX2 RX1 RX2 RX3 RX 4 T X3TX4 OT X1 OTX1 EX1 EX 2 C E U TX 1T X2 RX1 RX2 RX 3 RX4 TX3T X4 OTX 1 OT X1 EX1 EX2 T R M8 TX RXRXD T R M 7 TX RX RXD T R M 5 TX RX RXD T...

Page 121: ...h 2 CDUs special treatment for CDU see Appendix C for each sector and 2 omni antennas For the logical connection relationship between the combiner units and distribution units of each sectorized cell refer to the connections of O2 FI G U R E 92 CO N F I G U R AT I O N MO D E O F T H E S2 2 2 TY P E SI T E Fan Layer CMM CMM PDM T R M T R M T R M T R M T R M T R M CMM CMM PDM S P A S P A S P A S P A...

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Page 123: ...1544 6312 2048 8448 and 44736 kbs s GSM03 60 General Packet Radio Service GPRS Service description GSM03 64 General Packet Radio Service GPRS Overall description of the GPRS radio interface GSM04 04 Technical Specification Group GSM EDGE Radio Access Network Layer 1 General requirements GSM04 06 Mobile Station Base Station System MS BSS interface Data Link DL layer specification GSM04 08 Mobile ra...

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Page 125: ...nel No ATM Asynchronous Transfer Mode AUC Authentication Center BBP Base Band Processor BCCH Broadcast Control Channel BER Bit Error Rate BFI Bad Frame Indication BIE Base station Interface Equipment BP Burst Period pulse BSC Base Station Controller BSIC Base Station Identify Code BSS Base Station Subsystem BTS Base Transceiver Station CCCH Calling Control Channel CCH Common Channel CDU Combiner D...

Page 126: ...mission E1 E1 EAM External Alarm Module ECDU E Combiner Distribution Unit ECU Environment Control Unit EDGE Enhanced Data rates for GSM Evolution EIR Equipment Identity Register EPLD Erasable Programmable Logic Device ETP Extend Test Port FACCH Fast Associated Control Channel FB Frequency correction Burst FCCH Frequency Correction Channel FCLK Frame Clock FCM Fan Control Module FCS Frame Check Seq...

Page 127: ...plifier LO Local Oscillator LP Local Poll LPF Loop Filter LVDS Low Voltage Differential Signaling MAC Medium Access Control McBSP Multi channel Buffer Serial Port MM Mobility Management MMI Man Machine Interface MO Manage Object MS Mobile Station MSC Mobile Switch Center MSS Mobile Switch System MTBF Mean Time Between Failures NB Normal Burst NRZ Non Return to Zero coding OAMM Operational And Main...

Page 128: ...Packet Random Access Channel PS Power Supply PSI Packet System Information PTCCH Packet Timing advance Control Channel PTM Point To Multipoint RACH Random Access Channel RCU Radio Carrier Unit RDU Receiver Distribute Unit RF Radio Frequency RLC Radio Link Control RR Radio Resource management RSL Radio Signal Layer RX Receiver SACCH Slow Associated Control Channel SAPI Service Access Point Indicato...

Page 129: ... Block Flow TC Transcoder TCH Traffic Channel TDMA Time Division Multiple Access TEI Terminal Equipment Identification TFI Temporary Flow Identity TPF Tracking Phase lock Frequency synthesizer TPU Transceiver Process Unit TRM Transceiver Module TRX Transceivers Time Slot TS TX Transmitter Um Um USF Uplink State Flag VCO Voltage Control Oscillator VLR Visitor Location Register VSWR Voltage Standing...

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Page 131: ...maximum downlink coverage or the minimum power consumption at the same configuration condition in the cells of O1 and O2 it is required to connect the TRM TX output directly to the input of the CDU duplexer TX crossing CDU combiner FI G U R E 93 CDU PAN E L 1 Cable connecting combiner TX output to duplexer TX input 2 Duplexer TX input 1 2 ...

Page 132: ...and Proprietary Information of ZTE CORPORATION Solution As shown in Figure 93 remove the cable connecting the combiner TX output pointed by arrow 1 to the duplexer TX input connect the TRM TX output directly to the duplexer TX input pointed by arrow 2 ...

Page 133: ...rates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation For OUTDOOR use a Directional Antenna with a maximum gain of 17dBi is authorized for use with this unit Outside antennas must be position...

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Page 135: ... may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation For OUTDOOR use a Directional Antenna with a maximum gain of 11dBi is authorized for use with this unit Outside antennas must be positioned to observe minimum separation of 4 2M 13 78 feet for 900MHz unit and 3M 9 84 feet for 1800MHz unit from all user...

Page 136: ...ZXG10 BTS V2 9 Technical Manual 120 Confidential and Proprietary Information of ZTE CORPORATION This page is intentionally blank ...

Page 137: ...el 40 Figure 20 Mapping of PTCCH on the Physical Channel 43 Figure 21 Time Amplitude of the Normal Burst 45 Figure 22 Burst Types 46 Figure 23 Structure of the Radio Block 48 Figure 24 Position of the LapD Module 49 Figure 25 I Frame Structure of LapD 49 Figure 26 UI Frame Structure of LapD 50 Figure 27 LapDm Module 51 Figure 28 I frame Structure of LapDm 52 Figure 29 UI Frame Structure of LapDm 5...

Page 138: ...nel 90 Figure 74 The Actual Number of Physical Channels in a Carrier 90 Figure 75 Star Networking Mode of ZXG10 BTS V2 9 91 Figure 76 Chain Networking Mode 92 Figure 77 Tree Networking Mode 92 Figure 78 Cells in a Cellular System 93 Figure 79 Two Site Types 94 Figure 80 Card Layout of the Carrier Frame of ZXG10 BTS V2 9 for 40 W Configuration 94 Figure 81 Card Layout of the Carrier Frame of ZXG10 ...

Page 139: ... Table 4 PCCH 41 Table 5 Training Sequence in GSM 45 Table 6 Carrier Frame Configuration 95 Table 7 Number of Configured Carriers for all 40 W TRXs and the Corresponding Relationship Between CDUs and Antennae Configured in One Cell 96 Table 8 Number of Configured Carriers for all 80 W TRXs and the Corresponding Relationship Between CDUs and Antennae Configured in One Cell 97 ...

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