Fixed Broadband Wireless: NLOS Systems. Rajeev Krishnamoorthy VP, Technology Iospan Wireless

Transcription

1 Fixed Broadband Wireless: NLOS Systems Rajeev Krishnamoorthy VP, Technology Iospan Wireless

2 Business Drivers

3 Fixed BB Wireless Access Market Iospan Targets Managed Broadband Pipes Large Business Small & Medium Business Business Internet Access Intranet/Extranet VPNs Toll-Bypass PBX Extension Long Distance SOHO and Telecommuter Business Internet Access Access VPN Residential Voice Remote PBX Extension Mass Residential Retail Internet Access Residential Voice Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 3

4 Network Architecture Integrated Services on High BW Dynamic Pipe Metro Fiber IP, ATM Core NSÜ Enterprise ADM NSÜ ADM ADM ISP NSÜ PSTN DNS PBX T1/Analog Voice OAM&P DHCP TFTP NOC Customer Premise Equipment (CPE) Cell Site Access Shelf PA, Antennas Alarms,.. Service Provider Metro & Core Network Service Provider (NSP) NOC Management Servers (DHCP, DNS, TFTP, ) Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 4

5 Exploring Alternate Access Pure Line of Sight LMDS High Fade Margins in Indian Monsoon - Small Ranges High cost of equipment xdsl Copper Plant Condition Loop Unbundling Lower Frequency Wireless Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 5

6 SP Requirements Requirements Infocom Market Focus SMB SOHO HER Non-LOS Performance (K=0) Reliability & QoS Cellular Outdoor/Indoor CPE (4-6 miles) Low Cost ($/sub) High Data Rates (10Mbps+ Peak) Feature Parity With Legacy Services Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 6

7 Airburst Service Provider Economics Multi-Service Platform (Data and Voice) - Broadband User Experience Low Cost Per Subscriber High capacity w/ 75% fewer base stations High coverage(> than 90% subscriber penetration) High Frequency Re-use Indoor/Outdoor CPE Installations Wireline Performance (Fading and Interference Mitigation) Peak Data Rates - 14 Mbps Today, 50 Mbps 03 High QoS - Service Level Agreement Wireline Availability Scalability - Multi-Cell Architecture Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 7

8 Non-LOS Channels

9 Wireless Impairments Fading Co-Channel Interference Space-Selective Fading space Time-Selective Fading time Frequency-Selective Fading 5 0 C -5 I frequency Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 9

10 Spatial Processing System Tx Rx MAC/RLP PHY RF RF RF RF PHY MAC/RLP BTS Rx PHY RF RF RF Tx CPE RF RF PHY Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 10

11 Diversity Enables Better Coverage Signal/Noise Noise Floor SISO MIMO Range Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 11

12 Diversity Enables Better Reuse Signal / Intf. Ratio SISO MIMO Interference Weak Reuse Aggressive Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 12

13 Spatial Multiplexing Increases Speed 20 BPS/Hz 2x3 1x db 20 db SINR Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 13

14 Building Blocks MAC/RLP ARQ Interference Cancellation Hyper Diversity Non-LOS Robustness Spatial Multiplexing & Adaptive Modulation Poor BER Operation Scalability & Reuse Data Rates Reliability Peak Data Rates Capacity Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 14

15 IEEE Channel Models Extensive in-house channel measurements - Models characterize: Rician K-factor vs. range, NAU height, antenna beamwidth Channel selectivity in frequency, time (Doppler, Delay Spread) Antenna Correlation and XPD models Antenna Gain Reduction Factor Path Loss Models Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 15

16 MIMO - Entering All Standards Cell Size Macro Local Micro MIMO WCDMA IS-2000 BTooth MIMO MIMO AirBurst G (MIMO-OFDM) Hiperaccess Hiperlan a MIMO Data Rate MBPS Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 16

17 System Solution

18 AirBurst Network Architecture Integrated Services on High BW Dynamic Pipe Metro Fiber IP, ATM Core NSÜ Enterprise ADM NSÜ ADM ADM ISP NSÜ PSTN DNS PBX T1/Analog Voice OAM&P DHCP TFTP NOC Customer Premise Equipment (CPE) Cell Site Access Shelf PA, Antennas Alarms,.. Service Provider Metro & Core Network Service Provider (NSP) NOC Management Servers (DHCP, DNS, TFTP, ) Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 18

19 Cellular Network Deployment Demand Dependent Cell Radius 3 sectors per cell 2Tx, 3 Rx Antennas ABS MHz, 1.75 MHz Channel settings per sector (Up or Down) 48 MHz FDD Separation Adaptive Modulation per Subscriber f1 f2 f3 f1 f1 f2 f3 f2 f3 f1 f2 f3 Frequency re-use of 1x3 Interference Cancellation 14 slots, 14 Mbps/slot Peak Throughput Each line card serves a Up or Down Channel Flexible Configuration Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 19

20 Airburst PHY and MAC Features PHY OFDM Modulation - Robust for Broadband MIMO Diversity Mode - Eliminates Fading Spatial Multiplexing - Increases Spectral Efficiency 12 Adaptive Modem Modes - 6 Diversity, 6 SM 10x better spectral efficiency than 3G systems MAC ATM-like Fragmentation / Re-assembly Advanced ARQ Down Link scheduling - GoS, QoS Support Up link scheduling - Request/Grant CBR, CIR Support - Voice, Leased Lines Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 20

21 End to End QoS Packet Classification AirBurst QoS Mapping Function Transport QoS CBR CIR BE Gold (ATM CBR VC) Silver (ATM VBR VC) Bronze (ATM UBR VC) AAD300 ABS10000 Service Provider Core Class of Service (CoS) Subscriber Based Service Profiles RES, SOHO, SME CBR Constant Bit Rate (Gold) CIR Committed Information Rate (Silver) BE Best Effort (Bronze) Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 21

22 Diversity: Throughput & Coverage Throughput & coverage for Uplink under-the-eaves self-installed CPE Example: cell radius = 6km 1x1 System (SISO) Histogram of the net data rate (kb/s) Non Covered 0.5 1x2 System (SIMO) Histogram of the net data rate (kb/s) x3 System (MIMO) Histogram of the net data rate (kb/s) 2x3 System (MIMO) Ratio of users Ratio of users Non Covered Ratio of users Non Covered Net data rate (kb/s) Net data rate (kb/s) Net data rate (kb/s) G1 G1.5 Mass Deployment Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 22

23 Airburst Performance Outline Fixed Wireless Access Channel Characterization PHY Level Performance Modem Set Points: Operating signal-to-noise-plusinterference ratio to meet PER and availability targets Link Level Performance Link Adaptation Performance System Level performance Coverage (Cell 90% area reliability) Capacity (Mbps/Cell/Hz) Frequency Reuse Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 23

24 System Coverage Random K factor and Delay Spread According to Models Cell 90% coverage (kms) Micro-cell (15m BTS) Macro-cell (30m BTS) cell size (kms) NAU installation Antenna & pointing DT LE HE RT Desktop (DT) Low eaves (LE) High eaves (HE) Rooftop (RT) Omni-antenna random pointing 90deg antenna Best wall pointing. NAU type 90deg antenna, Best wall pointing. 90deg. Pointing toward BTS Height 1.5 meters 2.5 meters 4 meters 7.5 meters Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 24

25 S-T Processing- Coverage & Reliability Cell Planning, Deployment, & Provisioning 99.99% reliability 30 db gain 4 times distance reach (16 times coverage) Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 25

26 Link Budget Gains Coverage 30 db results in about 4x radius (~16x in coverage area, or subs) Data Link Rate 30 db results in 4-8x data rate increase Spatial Multiplexing adds another factor of % on top of this Reuse 30 db results in reuse improvement of ~4 We are targeting 1x3; competition is 4x3 or worse Capacity Increases 16 or greater based on link rate and reuse Cost 30 db will result in PAs, heat sink, power supply, boards, etc. which are considerably cheaper at both ends Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 26

27 Link Budget Gains (2) Interference Mitigation and Cancellation Results in better frequency reuse, better signal quality (higher SNR) and higher user data rate and capacity Dynamic Link Adaptation Results in lower SINR margin to guarantee data rates, availability, and QoS Consequently results in better frequency reuse and easier cell planning Spatial Multiplexing Results in doubling the data rate Wider CPE Beam-width Results in easier installation (makes self install possible) Enables easier cell-splitting to scale as capacity demands grow Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 27

28 Products & Trial

29 AirBurst Base Station - ABS TF1000 RF Combine & Timing Power 10 MHz AirBurst TF1000 Redundant Cooling ABS10000 Channel Assembly 17.2 Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 29 ABS10000 Chassis All Carrier Class Features - Future Multiple Sector Modular Design OC-3, DS3/E3 WAN Interface Remote Diagnostics

30 AirBurst Access Device - AAD300 Indoor Table Top or Outdoor Under Eaves (Ceiling, Wall Mount Options) 1 Ethernet 1 Tx, 3Rx Antennas Bridge, PPPoE Mode Power - 30dbm (outdoor) 10/100 baset Ethernet PC PC PC PC RF IN Line 1 FAX Existing RJ-11 wall jack Line 2 Future Existing dual pair wiring Line 1 Existing Line 1 RJ-11 wall jack Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 30

31 Trial In-Progress Iospan Wireless, Inc. // Company Confidential / February 2002 / Page 31