O slideshow foi denunciado.
Utilizamos seu perfil e dados de atividades no LinkedIn para personalizar e exibir anúncios mais relevantes. Altere suas preferências de anúncios quando desejar.

Huawei gsm grfu introduction

HUAWEI GSM GRFU Introduction

  • Entre para ver os comentários

Huawei gsm grfu introduction

  1. 1. ISSUE1.0 HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Security Level: Internal Use www.huawei.com 2009-02 HUAWEI GSM GRFU Introduction Wireless Case and Training
  2. 2.  This course mainly introduces the hardware structure, function, configuration principle and data configuration of multi-carrier GRFU (The GSM Radio Filter Unit ) of BTS3900 base station. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2
  3. 3.  Know the hardware principle and structure of GRFU.  Master the typical configuration of GRFU.  Master the data configuration of GRFU. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 3
  4. 4. CChhaapptteerr 11 PPrriinncciippllee aanndd ffuunnccttiioonn ooff GGRRFFUU Chapter 2 Typical configuration of GRFU Chapter 3 Data configuration of GRFU HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 4
  5. 5. Multi-Carrier Technology  The principle of multi-carrier technology: multiple carriers share one power amplifier and one RF channel. Single-carrier Technology Multi-carrier Technology  Features of multi-carrier technology.  Baseband pool replaced independent baseband unit. Improve the integration.  Digital IF combination replaced Analog RF combination. There isn’t combination loss.  Integration of part of RF front component and carrier frequency unit. Simplified BTS architecture. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 5
  6. 6. Introduction of GRFU  The GRFU performs modulation and demodulation between baseband signals and RF signals, processes data, and combines and divides signals. Implements the direct frequency conversion technique in the transmit channel, modulates the baseband signals to GSM RF signals; then, sends the signals to the antenna for transmission through the duplex filter after filtering, amplifying, and combining the RF signals. The combining can be performed as required.  Receives RF signals from the antenna and performs down-conversion, amplification, analog-to-digital conversion, digital down-conversion, matched filtering.  Provides power control, reverse power detection.  Provides frequency synthesis and loopback test.  Generates the CPRI clock, recovers the CPRI clock of lost synchronization, and detects alarms.  Provides the function of DPD/BPD. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 6
  7. 7. Introduction of GRFU  The main new features and functions of GRFU.  Inner Bias-Tee. Integration of feeder current to TMA.  Provides Voltage Standing Wave Ration (VSWR) detection.  Provides power sharing. Improves the network coverage, reduces the interference and power consumption and save the device cost. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 7
  8. 8. Introduction of GRFU  The main limitation of GRFU.  GRFU supports whole frequency band of PGSM 900MHz, high 45MHz frequency band and low 45MHz frequency band of DCS1800MHz. GRFU DL UL Whole 25MHz frequency band of 900MHz 935-960MHz 890-915MHz Low 45MHz of 1800MHz 1805-1850MHz 1710-1755MHz High 45MHz of 1800MHz 1835-1880MHz 1740-1785MHz  Instantaneous frequency bands of TX: M900:15MHz, M1800:15MHz. That means the frequency interval of any two frequency in a RF channel must not more than15MHz. Instantaneous bandwidth of RX is 25MHz.  Power sharing doesn’t support Concentric cell, Co-BCCH, IBCA, RAN sharing while static power can support these functions.  If GRFU support power sharing, DTX, Power control III, intracell handover must be open. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 8
  9. 9. Logical structure of the GRFU  The GRFU consists of the high-speed interface unit, signal processing unit, power amplifier, and duplexer. PA TX signal processing unit RX signal LNA processing unit LNA deeps- hgi h ti nu ecafr et ni CPRI BB U HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 9 TX/RXA RXB RX OUTA RX INB GRFU DUP TRX
  10. 10. Ports on the panel of the GRFU  Size: 397.25mm( h) ×70.62mm( w ) ×305mm( d) Weight: 10Kg  Ports on the panel Port Type Label Connector Type Description Port for transceiving RF signals ANT_RXB DIN connector Connecting to the antenna subsystem. ANT_TX/RXA CPRI CPRI0 SFP female connector Connecting to the BBU, or the upper-level RFU during the cascading. CPRI1 Connecting to the lower-level RFU during the cascading. Interconnection port for RF Receive signals RX_INB QMA female connector Input port of diversity signals in the antenna channel. RX_OUTA Output port of diversity signals in the antenna channel. Power supply port PWR 3V3 power connector Feeding power. Monitoring port MON RJ45 connector RS485 Monitoring、debugging port. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 10
  11. 11. Ports on the panel of the GRFU  Compare ports on the panel of GRFU with that of DRFU Port Type GRFU Relative position DRFU Relative position Port for transceiving RF signals ANT_TX/RXA lower ANT1 upper ANT_RXB upper ANT2 lower CPRI CPRI0 lower CPRI0 upper CPRI1 upper CPRI1 lower Interconnection port for RF Receive signals RX_INB upper Rx_1 in Rx_1 out RX_OUTA lower Rx_2 in Rx_2 out Monitoring port MON existence nonexistence —— HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 11
  12. 12. LEDs on the GRFU panel  LEDs on the GRFU panel LED Color Status Description RUN Green ON The power input is normal, but the module is faulty. OFF There is no power supply, or the module is faulty. 1s ON, 1s OFF The module is running properly. 0.2s ON, 0.2s OFF The software is being loaded to the module. ALM Red 1s ON, 1s OFF A fault alarm is generated. OFF No alarm is generated. ACT Green ON The module is functional and is correctly connected to the BBU. OFF The connection with the BBU is not set up. VSWR Red OFF No VSWR alarm is generated. ON The VSWR alarm is generated on the ANT_TX/RX port. CPRI0 Red/Green ON (green) The CPRI link is normal. ON (red) The interface module fails to receive signals. 1s ON, 1s OFF (red) The CPRI link is out of lock. CPRI1 Red/Green ON (green) The CPRI link is normal. ON (red) The interface module fails to receive signals. 1s ON, 1s OFF (red) The CPRI link is out of lock. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 12
  13. 13. Chapter 1 Principle and function of GRFU CChhaapptteerr 22 TTyyppiiccaall ccoonnffiigguurraattiioonn ooff GGRRFFUU Chapter 3 Data configuration of GRFU HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 13
  14. 14. GRFU Application Scenarios  Basic configuration principle  The DRFU and GRFU can be configured in the same cabinet. When the GRFU is configured, a single BTS3900/BTS3900A provides a maximum of 36 carriers with the maximum cell configuration of S12/12/12. In addition, a site configured with the BTS3900s can support a maximum of 72 carriers with the maximum cell configuration of S24/24/24.  One GRFU supports a maximum cell configuration of S6; two GRFUs supports a maximum cell configuration of S12. To support the configuration larger than S12, multiple antenna systems are used.  One GRFU does not serve two cells. Each cell with a single antenna can be configured with a maximum of two GRFUs.  GRFU supports 1-way TX and 2-way RX.  Star, chain, and ring, are supported between the BBU and the GRFUs.  When star and chain topology is adopted between the BBU and GRFUs, the GRFU supports 3 levels of cascading in a chain and thus the BBU supports a maximum of 18 (6 x 3) GRFUs. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 14
  15. 15. Configuration principle Base on Limitation of GRFU  Frequency Assignment  If the frequency interval of a cell is outside the range of 15MHz, 2 GRFUs can be considered to be used and the range of frequency for each GRFU also should be within15MHz.  Generally, it is suggested that the number of carriers should be set to 2 GRFUs averagely if 2 GRFUs are used in a cell. For example: S8 should be configured as 4+4 when 2 GRFU are used. S7 should be configured as 3+4 when 2 GRFU are used. If there’s limitation of frequency band, S8 also can be configured as 3+5 or 2+6. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 15
  16. 16. Configuration principle Base on Limitation of GRFU  Output power  The output power for each cell must fulfil the requirement of network plan. When the specification doesn’t fulfil the requirement, it can be improved by adding GRFUs.  The output power of all the cell must be the same because power sharing is mutually exclusive with concentric cell. For example, S7 configured as 3+4 when 2 GRFUs are used. The output power of GRFU configured as 3 carriers must be the same as that of GRFU configured as 4 carriers. Carrier of a cell 5 6 7 8 9 10 11 12 GRFU number 2 2 2 2 2 2 2 2 Carrier number for 2 GRFU( Recommendation ) 2+3 3+3 3+4 4+4 4+5 5+5 5+6 6+6 Output power 31W 31W 27W 27W 18W 18W 16W 16W Carrier number for 2 GRFU ( Supportability) 1+4 2+4/1+5 2+5/1+6 3+5/2+6 3+6 4+6 —— —— Output power 27W 27W/18W 18W/16W 18W/16W 16W 16W —— —— Limitation of Output power HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 16
  17. 17. Configuration principle Base on Limitation of GRFU  Frequency hopping  Cell without frequency hopping. The cell can work normally when the range of frequency is within 15MHz for each GRFU.  Cell with Baseband frequency hopping. The frequency range of 2 GRFUs must within 25MHz when 2 GRFUs are used. And the range of frequency also must be within 15MHz for each GRFU.  Cell with RF frequency hopping. The cell cannot adopt RF frequency hopping if the range of frequency is out of 15MHz. Because the frequency range of 2 GRFUs must be within 15MHz when 2 GRFUs are used. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 17
  18. 18. Antenna Configuration Principles of GRFU  One dual-polarized antenna can serve a maximum of two GRFUs.  By default, RX diversity is adopted on the GSM network. That is, two feeders connected to two single-polarized antennas or one dual-polarized antenna must be configured in a cell.  Each sector of the BTS must be configured with the minimum number of antennas.  For the 2-way RX diversity, each sector has two antenna channels. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 18
  19. 19. Transmit Mode and Receive Mode of GRFU  Transmit Mode of GRFU  Non-combination  Receive Mode of GRFU  2-way RX diversity  1-way RX HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 19
  20. 20. Output power of GRFU  The output power of different configuration is also configured differently. Frequency bands Configuration Output power ( GMSK/8PSK) PGSM 900MHz / GSM1800MHz S1 80W/53W S2 40W/26W S3 31W/20W S4 27W/17W S5 18W/12W S6 16W/10W HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 20
  21. 21. Typical configuration of GRFU  Single GRFU (S3-S6)  DOUBLE_ANTENNA (1TX+2RX)  When a dual-polarized antenna is configured, one TX channel and two RX channels are supported. The ANT_RXB and ANT_TX/RXA ports receive the signals from the antenna to achieve RX diversity. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 21
  22. 22. Typical configuration of GRFU  Two GRFUs (S7-S12)  SINGLE_ANTENNA_DOUBLE_RECEIVER (1TX + 2RX)  When the cell configuration is from S7 to S12, two GRFUs need to be configured.  The ANT_TX/RXA port on each GRFU supports the receiving and transmitting of signals. Two GRFUs provide RX signals for each other through the RF interconnection ports. Thus, the RX diversity is implemented. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 22
  23. 23. Typical configuration of GRFU  Single GRFU  SINGLE_ANTENNA_SINGLE_RECEIVER (1TX+1RX)  This scenario is mainly used in indoor coverage.  The ANT_TX/RXA port on GRFU supports the receiving and transmitting of signals. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 23
  24. 24. Typical configuration of GRFU  Single GRFU  DOUBLE_ANTENNA_SINGLE_RECEIVER (1TX+1RX)  This scenario is mainly used in subway.  The ANT_TX/RXA port on GRFU supports the transmitting of signals.  The ANT_RXB port on GRFU supports the receiving of signals. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 24
  25. 25. Chapter 1 Principle and function of GRFU Chapter 2 Typical configuration of GRFU CChhaapptteerr 33 DDaattaa ccoonnffiigguurraattiioonn ooff GGRRFFUU HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 25
  26. 26. Data configuration Based on MML  Data configuration of GRFU is similar with that of DRFU. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 26 End Start Add BTS ( slave chain) Add cell Add TRX( GRFU) Modify TRX Device Attribute Set other BTS Attribute
  27. 27. Add BTS  Command: ADD BTS  BTS TYPE must set as BTS3900_GSM ; TRX Board Type must set as GRFU ; Separate Mode must set as: Support; RXU Chain Head Port No means BBU CPRI port number connected to GRFU.  Example: ADD BTS: BTSIDX=0, BTSNAME="BTS3900", TYPE=BTS3900_GSM, UPNODE=BSC, SRN=0, SN=18, PN=0, MPMODE=MODE4_1, AST=ACTIVAED, DCIDX=0, ServiceMode=TDM, DCELLNAME="0", DCTYPE=GSM900, DCMCC="460", DCMNC="04", DCLAC=0557, DCCI=0001, DTRXIDX=0, CPLMode=SUPPORT, TRXBN=0, TRXTP=GRFU, TRXPN=0, FREQ=96, RXUName="0", RXUChainNo=0, RXUChainHeadPN=0, REVCFGRING=NO; HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 27
  28. 28. Add BTS HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 28 基站类型 BBU CPRI port number
  29. 29. Add BTS Slave Chain  Command: ADD SLAVECHAIN  Example: ADD SLAVECHAIN: IDXTYPE=BYNAME, BTSNAME="BTS3900", INPN=1, DESTNODE=BSC, SRN=0, SN=18, PN=1; Abis interface board port number HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 29
  30. 30. Add Cell  Command: ADD CELL  Example: ADD CELL: IDXTYPE=BYNAME, BTSNAME="BTS3900", CELLNAME="cell-1", CTYPE=GSM900, AST=ACTIVAED, MCC="460", MNC="04", LAC=0557, CI=0001, TRXBN=1, TRXTP=GRFU, TRXPN2=0, TRXFREQ=88, RXUName="1", RXUChainNo=1, RXUChainHeadPN=1; HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 30
  31. 31. Add Cell HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 31 BBU CPRI port number
  32. 32. Add TRX  Command: ADD TRX  Example: ADD TRX: IDXTYPE=BYNAME, CELLNAME="cell-1", TRXBN=1, TRXTP=GRFU, TRXPN2=0, FREQ=88, RXUName="1", RXUChainNo=1, RXUChainHeadPN=1; HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 32
  33. 33. Modify TRX Device Attribute  Command: MOD TRXDEV  Example: MOD TRXDEV: IDXTYPE=BYNAME, CELLNAME="cell-1", TRXBN=1, TRXPN=0, POWL=10, POWT=DEFAULT, RCVMD=MAINDIVERSITY, SNDMD=DIVERSITY; HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 33
  34. 34. Operation and Maintenance Command  Set RXU Attributes: SET RXUCHAINPARA  Modify name of RXU board : SET RXUNAME  Query parameter of RXU board : LST RXUBP  Query Attributes of RXU link : LST RXUCHAINPARA  Query topology structure of RXU link : LST RXUCHAINTPLGY  Set breakpoint of RXU link : SET BREAKPOINT  Combine two RXU links to a ring : CBN RXUCHAIN  Set breakpoint : SET BREAKPOINT  Split ring to a link: SPT RXUCHAIN HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 34
  35. 35. Thank you www.huawei.com

×