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Roles of Wireless at the Network Edges

Roles of Wireless at the Network Edges. Joseph Camp Fiber/Wireless Panel December 12, 2005. State of Wireless. Today - Single Hop Networks (per wire) Luxury - if wireless goes down, plug into wall Mobile Internet access public places Near Future - Wireless Mesh Networks

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Roles of Wireless at the Network Edges

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  1. Roles of Wireless at the Network Edges Joseph Camp Fiber/Wireless Panel December 12, 2005

  2. State of Wireless • Today - Single Hop Networks (per wire) • Luxury - if wireless goes down, plug into wall • Mobile Internet access public places • Near Future - Wireless Mesh Networks • Mission Critical - wireless cannot go down • Municipality offers bandwidth to low-income • Municipal functionality (police, fire, transport.) • High speed Internet access in rural areas Joseph Camp

  3. Recent History of Access • MSO - Multiple System Operators • ILEP - Incumbent Local Exchange Carriers Joseph Camp

  4. Wired Access Ranges • DSL bidirectional but unable to achieve 100 Mbps • Cable achieves 100 Mbps at upper limit but asymmetric ($3.5-4k/home sym) • Fiber achieves both ($1k-$2k/home) • Are wires the only access solution? Joseph Camp

  5. City-wide Wireless Projects • Philadelphia - 135 sq. miles (Earthlink) • Expected cost: $10 million, $25-30/home • Public access (~1Mb) low-income ($10/month) • Los Angeles, San Fran., Portland, New York • Houston RFP • Contract to WISP, WISP charged to create revenue • Services to municipalities • Medical Services, Education, Home Workforce • Mobility/Connectivity in public places • Traffic/Crime Surveillance • Parking Meters, Real-time Bus Information Joseph Camp

  6. Cost According to Cities Joseph Camp

  7. The Wireless Future • Previous projections using IEEE 802.11 • Immediate Future (10 years): • 4x4 MIMO systems: approach 400 Mbps • Approximately 1 Gbps (PHY layer) • Directionalize backhaul to achieve rates • Beamforming • Comparing PHY rates, 10x improvement Joseph Camp

  8. MIMO Reliability • Throughput gain with multiplexing • Multiple streams of data per antenna array • Build reliability into the system with diversity for low latency applications • Redundancy of bits on single antenna array • VoIP, video, streaming applications Joseph Camp

  9. Rural Access • Areas of high fiber density - single hop wireless (FTTH) • Areas of low/no fiber density - mesh backhaul networks Joseph Camp

  10. Spectrum Expensive? • Could equate to $1 billion for 1GHz • However, • Cell phone companies pay anywhere from $500 million to $5 billion for spectrum • Booming $400 billion industry • There is a demand! Joseph Camp

  11. Summary: Roles of Wireless • Mobility • 2001 - 727 million mobile users (world) • 2005 - 1.7 billion mobile users • Municipalities • Ubiquitous Internet Access (Bus stops, parks, traveling, airports, etc.) • Traffic/Crime, Parking, Fire/Police RFID • Medical Services, Education, Workforce • High Speed Internet Access to Rural Areas • Fiber Deployment not cost effective • Wireless backhaul to users Joseph Camp

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