Francine Lalooses David Lancia Arkadiusz Slanda Donald Traboini

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Presentation transcript:

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

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 Lalooses*Lancia*Slanda*Traboini

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. Lalooses*Lancia*Slanda*Traboini

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. Lalooses*Lancia*Slanda*Traboini

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 Lalooses*Lancia*Slanda*Traboini

Lalooses*Lancia*Slanda*Traboini W-ATM Lalooses*Lancia*Slanda*Traboini

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 Lalooses*Lancia*Slanda*Traboini

Lalooses*Lancia*Slanda*Traboini Operating Frequency Lalooses*Lancia*Slanda*Traboini

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 Lalooses*Lancia*Slanda*Traboini

Proposed Architecture Lalooses*Lancia*Slanda*Traboini

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 Lalooses*Lancia*Slanda*Traboini

Lalooses*Lancia*Slanda*Traboini W-ATM Base Stations Lalooses*Lancia*Slanda*Traboini

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 Lalooses*Lancia*Slanda*Traboini

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 Lalooses*Lancia*Slanda*Traboini

Lalooses*Lancia*Slanda*Traboini Magic WAND Lalooses*Lancia*Slanda*Traboini

Lalooses*Lancia*Slanda*Traboini Goals Simulate the effects of noise on choosing a channel Analyze the effects of mobility on a wireless ATM network Lalooses*Lancia*Slanda*Traboini