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Performance Analysis of Replication ALOHA for Fading Mobile Communications Channels

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2 Author(s)
Tsun-Yee Yan ; Jet Propulsion Laboratory, Pasadena, CA, USA ; Clare, L.P.

This paper describes an ALOHA random access protocol for fading communications channels. A two-state Markov model is used for the channel error process to account for the channel fading memory. The ALOHA protocol is modified to send multiple contiguous copies of a message at each transmission attempt. Both pure and slotted ALOHA channels are considered. The analysis is applicable to fading environments where the channel memory is .short compared to the propagation delay. It is shown that smaller delay may be achieved using replications and, in noisy conditions, can also improve throughput.

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Communications, IEEE Transactions on  (Volume:34 ,  Issue: 12 )