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Mobile Computing - Bluetooth - Multiple Access Protocol, Study notes of Mobile Computing
Detailed informtion about Multiple Access Protocol, Channel, Orthogonal , Assignment , Efficient, but circuit control function are required, Scheduled Multiple Access Protocol.
Typology: Study notes
2010/2011
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Download Mobile Computing - Bluetooth - Multiple Access Protocol and more Study notes Mobile Computing in PDF only on Docsity! 1 Multiple Access Protocol • If many users share a channel • and two or more users transmit packets simultaneously, • collision may occur. • To avoid the collision, suitable access protocol – should be selected. Channel • Signal space is divided and assigned to each user. •Orthogonal (no interference among users) •Assignment (ex. frequency, time slot, code)–Static Assignment •Simple, but inefficient.–Demand Assignment •Efficient, but circuit control function are required. Classification
Multiple Access Protocol
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Scheduled Access Random Access
Static Demand Repeat Reservation
Assignment Assignment Random Access Random Access
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*FDMA * Polling/Selection * ALOHA *t-ALOHA
*TDMA _ * Token-passing *s-ALOHA *PRMA
*CSMA BE
-ISMA Why Se
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