1. Broadband Fixed Wireless

2. 2 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel 1 GHz 2.5 3.5 5.810242628384060 LOS 5000200013501000400300 200 20 30 Voice, Data, Fax, ISDN 256 Kbps 1 to 50 Mbps + TDM Leased Lines Bandwidth (MHz) 1400 200 100 Spectrum Availability + High Speed Internet and Multimedia + Ultra High-Speed LAN/WAN No LOS 10 to 100 Mbps >100 Mbps LMDSMMDSUNII 2Ghz to 40Ghz Unlicensed National Information InfrastructureMultichannel Multipoint Distribution Service Local Multipoint Distribution Service

3. 3 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel 1 GHz 2.5 3.5 5.810242628384060 LOS 5000200013501000400300 200 20 30 Voice, Data, Fax, ISDN 256 Kbps 1 to 50 Mbps + TDM Leased Lines Bandwidth (MHz) 1400 200 100 Spectrum Availability Worldwide + High Speed Internet and Multimedia + Ultra High-Speed LAN/WAN No LOS 10 to 100 Mbps >100 Mbps

4. 4 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel MMDS MMDS - Multichannel Multipoint Distribution Service FCC regulated wireless cable system Delivery of multiple video signals via point-to-multipoint microwave transmissions Comprised of 33 microwave frequencies in 2.5 GHz band

5. 5 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel UNII UNII – Unlicensed National Information Infrastructure Located in 5.2 – 5.8 GHz bands

6. 6 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel LMDS LMDS – Local Multipoint Distribution Service Located in 28 GHz and 31 GHz bands Broadband radio service designed to provide two way transmission of voice, high speed data and video Low powered transmitters broadcast voice, data and video signals in metropolitan areas

7. 7 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel Spectrum: Horses for Courses Less than 6 GHz Long range (up to 30 miles), Non LOS, not affected by weather Low-cost equipment - residential and SOHO CPE Spectrum suitable for mass market deployments Greater 6 GHz LOS, short range (1-3 miles), affected by weather, more spectrum (1Ghz) Spectrum used specifically for urban deployments to Large business or Multi-tenant units

8. 8 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel Reach Distance From Hub Point-to-Point Links Point-to-Multipoint 28 GHz 38 GHz 5.346.92 Reach Distance*, Km *Assume Rain Zone K, Single Channel per Transmitter, same power, same dB gain antennaes for all frequencies. Reach Distance**, Km **Assume Rain Zone K, 6cm antennae for 99.995% average availability, vertical polarization. 3.57 7.5 5.0 2.5 GHz 20.050.0 23 GHz 6 GHz 28 GHz 2.5 GHz 24 GHz 40

9. 9 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel P2P vs P2MP P2P dedicated bandwidth P2MP shared bandwidth P2MP Sector

10. 10 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel Cost per Subscriber by Network CPE Cost PTP PMP # of Subscribers Cost Per Subscriber This is the point at which PMP becomes more economically viable than a PTP network, generally ~8 links.

11. 11 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel Unified Broadband Wireless Reference Architecture Standard I.F. Wireless Service Modules Small Office Branch Office SOHO Telecommuter PBX CPE Networks End-to-End Services, Network Management, Provisioning AND Billing Backhaul Network FCC Compliant R.F. IP ATM WDM FR Any RF band Consumer 38 GHZ Radio LMDSRadio UNIIRadio MMDSRadio 10 GHZ Radio 38 GHZ Radio LMDSRadio UNIIRadio MMDSRadio 10 GHZ Radio Industry Suppliers Integrated Wireless MAC 38 GHZ Radio Other SAT

12. 12 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel Key Features IP Packet Based Solution with DOCSIS 1.1 support Up to 44.4 Mbps full-duplex throughput Up to 25 Miles in connection distance Fiber quality link > 10 -11 BER for Data, > 10 -8 BER for Voice Supports both MMDS (2.5 GHz) and UNNI (5.7 GHz) Encryption support: 56 bit DES with RSA key management

13. 13 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel The Problem “ ” Line-of-Sight: The technology, while promising, continues to have nagging "line-of- sight" issues. Wireless signals in these systems must have a clear path to travel as they bounce from rooftop to rooftop. Trees, buildings and even inclement weather, such as snow and pelting rain, can cause static, dropped calls and hazy connections. Leslie Cauley staff reporter in The Wall Street Journal's New York bureau September 20, 1999

14. 14 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel The Solution VOFDM (Vector Orthogonal Frequency Division Multiplexing) technology employs both frequency and spatial diversity creates a robust processing technique for multipath fading and narrow band interference VOFDM enables greater coverage substantially reduces LOS limitations … Subscriber Base Station Paths …

15. 15 N+I_2k © 2000, Peter Tomsu 03_bb_fixed_wirel Transmit Spectrum Receive Spectrum Channel Training Tone Data Tone What is VOFDM? Each VOFDM burst carries data and training Allows for variation in the channel Reduces effect of frequency offset VOFDM, interleaving and coding Create a robust processing technique for multipath fading and narrow band interference

16. Questions ???