1. Francine Lalooses David Lancia Arkadiusz Slanda Donald Traboini
Wireless ATM
Francine Lalooses
David Lancia
Arkadiusz Slanda
Donald Traboini

2. Lalooses*Lancia*Slanda*Traboini
Overview
What is ATM?
The Promise of Wireless ATM
Transition from Wired ATM
Advantages and Disadvantages
Research and Implementations
Goals of the Project
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3. Lalooses*Lancia*Slanda*Traboini
What is ATM?
Asynchronous Transfer Mode (ATM)
A networking technology developed by the telephone companies to handle all types of data using fixed 53-byte cells, or packets.
Creates virtual point-to-point circuit connections between the source and the destination.
Data rates from 25 to 622 Mbps.
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4. Lalooses*Lancia*Slanda*Traboini
What is ATM?
The small cell size allows ATM to transmit video, audio, and computer data over the same network, while guaranteeing a preset QoS level for each.
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5. Lalooses*Lancia*Slanda*Traboini
The Promise of W-ATM
Extension of LAN for mobile user
Simplified wiring and configuration
Provide high-speed data access for users without need for a new wired infrastructure
Create unforeseen opportunities for future applications
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6. Lalooses*Lancia*Slanda*Traboini
W-ATM
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7. Lalooses*Lancia*Slanda*Traboini
Transition Issues
Physical Layer
Infrared vs. Radio
Circuit-switched vs. Packet-switched
Channel Coding
Multiple Antennas
Operating Frequency
Licensed vs. Unlicensed Frequency
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8. Lalooses*Lancia*Slanda*Traboini
Operating Frequency
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9. Lalooses*Lancia*Slanda*Traboini
Transition Issues
Data Link Layer
Encapsulation
Header Compression
ARQ (Automatic Repeat Request) vs. FEC (Forward Error Correction)
Quality-of-Service Issues
Split Functionality
An Example Protocol
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10. Proposed Architecture
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11. Lalooses*Lancia*Slanda*Traboini
Advantages of W-ATM
Benefits of ATM made mobile
Free to roam
Flexible bandwidth allocation
Efficient multiplexing of traffic
Availability of existent ATM switching
Flexibility of reusing same frequency
Soft handoff without any data loss
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12. Lalooses*Lancia*Slanda*Traboini
W-ATM Base Stations
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13. Disadvantages of W-ATM
Delay to multi-path interference
Hop-by-hop routing method not adequate
Virtual connection takes longer
Poor physical level characteristics
High noise interference
Finding a suitable wireless channel
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14. Lalooses*Lancia*Slanda*Traboini
Research and Implementation Magic WAND (Wireless ATM Network Demonstrator)
Goals:
To specify and implement W-ATM
To promote the standardization of W-ATM
To demonstrate that W-ATM is technically feasible
Achievements
Specifications of W-ATM
Standardization
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15. Lalooses*Lancia*Slanda*Traboini
Magic WAND
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16. Lalooses*Lancia*Slanda*Traboini
Goals
Simulate the effects of noise on choosing a channel
Analyze the effects of mobility on a wireless ATM network
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