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A 3G Femtocell Radio - Analog Devices VON Boston Networking Conference Oct 29 2007

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VON is the authoritative voice on the upheavals transforming the $2 trillion telecommunications industries. Offering hard analysis and business intelligence for both advanced IP communications and ...

VON is the authoritative voice on the upheavals transforming the $2 trillion telecommunications industries. Offering hard analysis and business intelligence for both advanced IP communications and traditional telephony, VON/xchange covers IP telephony and video, unified communications, mobile and wireless, cloud-based communications, wholesale transport, software and applications, optical networking, Ethernet, and cable systems – all from the operator’s point of view.

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    A 3G Femtocell Radio - Analog Devices VON Boston Networking Conference Oct 29 2007 A 3G Femtocell Radio - Analog Devices VON Boston Networking Conference Oct 29 2007 Presentation Transcript

    • The World Leader in High Performance Signal Processing Solutions 3G Femtocell Radio VON Boston David J. Donovan Wireless Infrastructure Business Development Analog Devices, October 29, 2007
    • Agenda Brief Overview of ADI Femtocell Identity Crisis Market Drivers & Deployment Risks Specification Issues & Challenges Operator expectations Semiconductor RF-IF Solution BOM Costs Analog Devices 3G Femtocell Radio October 29 , 2007 2
    • ADI At A Glance A leadership portfolio of core technology and signal processing systems expertise that is leveraged to create competitive advantage for our customers APPLICATIONS PLATFORMS EXPERTISE Portable Media Devices Wireless Infrastructure Audio Audio Audio Audio Computing & Gaming Digital Entertainment Advanced TV Video Video Imaging Imaging Automotive Industrial Medical Control Control Monitoring Monitoring Data Data Processing Processing Sensing Sensing Sensory Sensory Communication Communication Algorithms Algorithms Application Expertise ● Development Tools Interface Interface Wireless Wireless Data Converter Amplifier DSP Power Management RF IC MEMS CORE TECHNOLOGY Analog Devices 3G Femtocell Radio October 29 , 2007 3
    • Femtocell Identity Crisis? Basestation High performance High reliability Medium cost Low volume Femtocell Single standard Performance High performance High reliability Low cost High volume Multi-standard Handset Lower performance Very low cost Very high volume Multi-standard Cost Analog Devices 3G Femtocell Radio October 29 , 2007 4 Photo Sources: Ericsson, Alcatel-Lucent, Nokia
    • Meeting Market Expectations & Cost Analog Devices 3G Femtocell Radio October 29 , 2007 5 Photo Source: unknown
    • Simplified Femtocell Network Integration RNC functions for Radio Resource Management shifted to Femtocell Femtocell RF-IF BB DSL IP IP Router Network Network <$100 BOM Home Core Network Analog Devices 3G Femtocell Radio October 29 , 2007 6
    • Market Drivers Consumer Benefits--- Better Indoor Coverage Inadequate in-door coverage - top consumer complaint of their cellular service provider Lower PA power levels in handset Operator Benefits--- Reduces Capex & Opex Improves network capacity and coverage Pushes backhaul service to consumer BB IP network Consolidate services – Especially attractive to combined broadband/wireless provider Reduce churn rate by increased service and user capital investment Analog Devices 3G Femtocell Radio October 29 , 2007 7
    • Deployment Risks & Challenges Location/Registration E911/GPS adds cost and complexity Radio Network management Narrowband GSM signals are blockers to adjacent cells Potential network interference (W)CDMA systems are easier to manage VOIP WiFi Threat Similar operator objectives – different model More expensive dual mode phone vs. CAPEX Challenges above are similar Repeaters & DAS can address the critical coverage issue, but does nothing for capacity, bundling service Analog Devices 3G Femtocell Radio October 29 , 2007 8
    • Deployment Risks & Challenges cont. Backhaul architecture – several options IP protocols skip the traditional cellular network Optimum solution an unknown but will impact the degree of the problems below….. Network Synchronization BTS needs accurate clock and sync to network Timing module could have negative impact on BOM IEEE 1588 scheme for sync to IP backhaul Needs further study QoS risks Backhaul (Broadband pipe) management to arbitrate users/data rate may not be simple Bigger issue for wireless operator with no ties to broadband provider Analog Devices 3G Femtocell Radio October 29 , 2007 9
    • 3GPP Base Station Classes: First specified in Release 6 Wide Area Base Stations: Macro Cell Scenario <20km cell, 70 dB coupling loss UE-MS Medium Area Base Stations: Micro Cell Scenario 1km – 3km, 53 dB coupling loss UE-MS, <38dBm Local Area Base Station: Pico Cell Scenario 100m – 300m, 45 dB coupling loss UE-MS, <24dBm Home Base Station / Access Points have not been considered in Release 6 and onwards yet Home Access Scenario (20m), 10dBm – 20dBm Radio Requirements still depend on system simulations & trials Analog Devices 3G Femtocell Radio October 29 , 2007 10
    • Base Station Definitions Picocell Basestation Femtocell Basestation Voice & Data Service 250 mW / 6 kg 10mW – 100mW / 1 kg ~80 Voice Users 20mW typical (+13dBm) HSDPA 14.4 Mbps 4 Voice & Data Users HSUPA 7.2 Mbps HSDPA 14.4 Mbps HSUPA 7.2 Mbps Form Factor & User Capacity Photo Sources: Andrew, Ubiquisys Femtocells are also referred to as Home Access Points and may be part of a broadband gateway platform. Analog Devices 3G Femtocell Radio October 29 , 2007 11
    • 3GPP WCDMA UE vs. BS RF Specifications 3GPP Rx Specification Unit UE 25.101 BS 25.104 Reference Sensitivity 12.2kbps dBm -117 -107 Maximum Channel Power dBm -25 ---- Dynamic Range Test Level (AWGN 18dB above wanted) dBm ---- -77 Adjacent Channel WCDMA 5MHz Offset dBc 39 63 In Band WCDMA Blocking 10 MHz Offset dBc 48 71 Out of Band CW Blocking 20 MHz Offset dBc ---- 86 Out of Band CW Blocking 60 MHz Offset dBc 74 ---- Out of Band CW Blocking 85 MHz Offset dBc 89 ---- Narrow Band GMSK Blocking 2.7MHz Offset dBc 41 64 Wide Band Intermodulation CW 10MHz + WCDMA 20MHz dBc 58 63 Narrow Band Intermodulation CW 3.5MHz + GMSK 5.9MHz dBc 54 64 3GPP Tx Specification Unit UE 25.101 BS 25.104 Maximum Power dBm 24 <24 Maximum Power Accuracy +/- dB 2 2.5 Minimum Power Control Step dB 1 0.5 1dB Step Accuracy +/- dB 0.5 0.5 10dB Step Accuracy +/- dB 2 2 Power Control Range dB 74 18 ACLR 5MHz dB 33 45 ACLR 10MHz dB 43 50 Tx Noise in own Rx band dBm/Hz -132 EVM % 12.5 17.5 Peak Code Domain Error dB -15 -33 Phase Discontinuity deg 30 ---- Analog Devices 3G Femtocell Radio October 29 , 2007 12
    • Femtocell Specifications No formal spec for this platform The femtoforum.org was organized to promote deployment of Femtocells worldwide through collaboration and interoperability Whole wireless infrastructure eco-system participates Goal is to make a spec recommendation to 3GPP specific to home base stations Analog Devices 3G Femtocell Radio October 29 , 2007 13
    • Operator Expectations Operators require a self-managed plug & play femto layer at typical mobile subscriber acquisition cost points TRX + BB IC BOM Roadmap to BOM COST <$70 <$40 Single-Point Minimum Manufacturability Radio Calibration Production Time Autonomous Ease of Network 2G & 3G bands Power Control & Integration scanning Self-Configuration Analog Devices 3G Femtocell Radio October 29 , 2007 14
    • Considerations for a Low FemtoCell BOM Minimal manufacturing costs (radio calibration) Highly integrated silicon functionality Multi-band operation Leverage existing market economy components (eg handset) Multiple functions in one package Minimizing component count (glue-less interfaces, integrated passives) Power consumption Footprint Analog Devices 3G Femtocell Radio October 29 , 2007 15
    • Radio Calibration Representative Output Power Curve Representative 1-Point Calibration Error 40 30 1.00 Output Power (dBm) 20 10 0.50 E r r o r (d B ) 0 -10 0.00 -20 -30 -0.50 -40 -50 -1.00 0 0.5 1 1.5 2 5 10 15 20 25 30 35 Vse t (Volts) Output Power (dBm) Single point calibration is possible and results in an accuracy better than the competition Multi-point calibrations [2 - 6 points] add to TCO An integrated RMS power detector is designed to meet the stringent power control requirements of WCDMA systems Analog Devices 3G Femtocell Radio October 29 , 2007 16
    • TRX Band Coverage Requirements-UMTS Tx/Rx Data Band Monitor UMTS Bands Uplink Downlink Support Support ADF4602, ADF4602, I 1920 - 1980 2110 - 2170 ADF4602-5 ADF4602-5 ADF4602, ADF4602, II 1850 - 1910 1930 - 1990 ADF4602-5 ADF4602-5 ADF4602, ADF4602 III 1710 - 1785 1805 - 1880 ADF4602-5 ADF4602-5 IV 1710 - 1755 2110 - 2155 No No ADF4602, ADF4602 V 824 - 849 869 - 894 ADF4602-5 ADF4602-5 ADF4602, ADF4602 VI 830 - 840 875 - 885 ADF4602-5 ADF4602-5 VII 2500 - 2570 2620 - 2690 No No ADF4602, ADF4602, VIII 880 - 915 925 - 960 ADF4602-5 ADF4602-5 ADF4602, ADF4602, IX 1749,9 - 1784,9 1844,9 - 1879,9 ADF4602-5 ADF4602-5 X 1710 - 1770 2110 - 2170 No No Analog Devices 3G Femtocell Radio October 29 , 2007 17
    • 2007 Development Platform: Integrated Converter MxFE & Integrated Radio MxFE AD986x ADFTRX Radio Technology Highly integrated Transceiver High Performance ADCs – DACs optimized for No external SAW filters (apart from Duplexer) base station applications 4 Code Transmit compatible (4+ users) Highly Integrated Smart Partitioning Accurate Integrated power control 64 pin LFCSP Low Power RF CMOS 6x6mm 32 pin package DATA ADC I MUX & LATCH ADC Q I+Q IP Link AUX DAC .. . Synth- ÷2 Digital I/O Interface Configuration SPI REGISTERS AUX ADC esizers VCT ÷2 PDLO ADL5320 Baseband AUX DAC . .. CXO ADL5541 .. . AFC 26MHz AUX ADC Clock PA AUX DAC Buffer I+Q 4 Bit I GPIO 2X DAC LATCH & Inter- DAC DEMUX polation Gain DC Q Control DAC DC DAC CLK PLL ADC Attn CLOCK 3 Wire DISTRIBUTION Bus PDLO MxFE ADF TRX Analog Devices 3G Femtocell Radio October 29 , 2007 18
    • UMTS Radio Transceiver Single Chip Tri-band 3G Transceiver 3GPP 25.104 Release 6 WCDMA/HSDPA TX_Pwr_Control ADF4602 Local Area Class BS in Band 1-3,5,6,8,9 WCDMA &GSM Monitoring of Bands 1-3,5,6,8,9 TX_Pwr_Control TXBBIB TXBBI TXRF Minimal external components TX_Pwr_ Control TX_Pwr_Control TXBBQ TXBBQB No Tx SAW or Rx Inter-stage SAW filters TX PLL Integrated Fast RMS power detector LO Generator Loop Filter Frac N Synth VSUP7 Integrated Power Management (3.2-5.5V input) RMS Gain Control TX_Pwr_Control Integrated Synthesizers incl. PLL loop filters PDET Detector TX Power Management System System [Bus] Integrated PA bias control DACs/GPOs LO Generator RX PLL Loop Frac N VSUP6 Filter Synth Easy to use with minimal calibration RX_LO_LB Automatic fast Tx power control RXHB1RF I Chan Selectable Bandwidth baseband filters RXBBI RXBBIB Automatic Rx offset control RXHB2RF DC Offset Correction Simple gain, frequency, mode programming RXBBQ RXLBRF Low supply current Q Chan DC Offset RXBBQB 35mA typical Rx current RX_LO_LB Correction REFIN 40-100mA Tx current (varies with Pout) Serial 26 MHz 19.2 MHz Interface 6x6mm LFCSP package VDD1 LDO1 LDO2 LDO3 LDO4 LDO5 VSUP8 Analog Devices 3G Femtocell Radio October 29 , 2007 19
    • UMTS IF Converter VIN+ A RX Syc ADC Single Chip Dual Rx ADC VIN- A DATA MUX & Tx /DAC VIN+ B & LATCH ADC Dual 10b/12b, 65MSPS ADC VIN- B Dual 10b/12b, 130MSPS DAC 3 Channels of Analog Auxiliary I/O .. . AUX DAC Flexible ADC 65MSPS AUX ADC SPI REGISTERS I/O Interface Configuration I/O Bus [0:23] DAC 130MSPS Digital Test Modes .. . AUX DAC Power Down Modes . .. AUX ADC Adjustable Interface Timing AUX DAC SPI Small footprint 64 Lead LFCSP IOUT+ A lead-free package DAC IOUT- A 2X LATCH Inter- & polation DEMUX IOUT+ B TX Sync IOUT- B DAC PLL OSC 1 CLOCK DISTRIBUTION CLKOUT1 Analog Devices 3G Femtocell Radio October 29 , 2007 20
    • 3G Local Area / Home Area BTS Radio – Proposal AD9862/AD9863 ADFTRX Transceiver 850 Rx ADC Monitor 850-900 match 900 Rx ADC 1800 Rx Monitor 1800-2100 match 1900 Rx B1 DL 3GPP Band 1 UL match B1 UL B1 DL DAC 3GPP Band 1 DL PA DAC Power Detect attn Complete Radio Module including PA options Level plan depends on required antenna output power Analog Devices 3G Femtocell Radio October 29 , 2007 21
    • Femtocell Demonstrator Hardware ADF4602 AD9863 ADL5541 ADL5320 Regulator Front-End Duplexer, Isolator and Coupler. TCXO (26MHz) Control Software via GUI FIFO data interface board Analog Devices 3G Femtocell Radio October 29 , 2007 22
    • WiMAX Femtocell AD9352 IP Backhaul ADL5523 Balun FPGA ASIC Pusle Shape Filters Balun Sample Rate Conversion DSP/ ADL5571 FPGA FEC Network Processor TigerSHARC Interface Highly integrated CPE radio transceiver External LNA and PA allow flexibility in system design Digital baseband complexity similar to the UMTS Femtocell Analog Devices 3G Femtocell Radio October 29 , 2007 23
    • Multimode Femtocells GSM 850 GSM 900 VCO ADL5523 AD9874 Diversity IF to Baseband Receiver DCS AD8342 ADC ADL5521 ADL5523 ADL5350 IF ~ 100 to 200 MHz IP Backhaul PCS SAW ADC ADL5350 ADL5525 Main UMTS ADL5530 AD6652 65 - FPGA ASIC Diversity ASIC ADC ADC ADL5523 ADL5221 Pusle Shape I+Q ADC ADSP BF536 - GSM 850 Pusle Shape Filters ÷2 ADC Filters PLL Synth- VCT ADC AD9510 PDLO ÷2 esizers CXO DAC ADF436 PLL Clock Sample DSP/ GSM 900 ADL5541 dist DAC Sample 0 ADF436 Rate FPGA 26MHz DAC Rate 0 Conversion DCS Clock Conversion I+Q 4 Bit Buffer FEC PA ADL5322/23 ADL5541 DAC PCS GPIO DAC DAC FEC Gain Network DAC Control 0o Network AD9763 Processor UMTS DAC 90 ADC 3 Wire Processor o TigerSHARC Bus TigerSHARC Pout ~ 24 dBm RX Gain Interface PDLO DAC Interface ADFTRX ADL8 ADuC70XX AD8349 Dual 10 bit 125 MSPS 362 Precision AD9862 ADL5 Microcontroller 500 26 MHz AD9549 Network clock in VCXO Clock synch UMTS/GSM, CDMA Femtocells designed to pico or macro BTS specs Receive band blocking spec in GSM is challenging Is the business case sound for investments in multimode Femtocells? Analog Devices 3G Femtocell Radio October 29 , 2007 24
    • Semiconductor BOM Cost v. Data Rate FR UMTS EV-DO Full Rate FR UMTS / EDGE FR UMTS WiMAX so EV-DO adi EVDO io le r ad WiMAX Data Rate ltip r gle HR UMTS Mu HR /EDGE Sin Half Rate UMTS CDMA 1X GSM/EDGE Cost Analog Devices 3G Femtocell Radio October 29 , 2007 25
    • Summary Semiconductor vendors can play a key role in the cost reduction and migration of Femtocells Future proofing solutions, integrations Design for manufacturing, radio calibration Operators can influence their own cost base Be reasonable in requirements A Femtocell spec will help, e.g. output power requirements vary Trials will help codify the specs Work with semi vendors to achieve best performance at most reasonable cost and mitigate risk Next phase is cost reduction and spec rationalization ADI solutions Analog Devices 3G Femtocell Radio October 29 , 2007 26