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ARQ Protocols and Unidirectional Codes

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3 Author(s)
Anantha, M. ; Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR ; Bose, B. ; Tallini, L.G.

Forward error control (FEC) and automatic-repeat request (ARQ) is two main techniques used for reliable data transmission in computer and communication systems. In this paper, some simple, low cost error control techniques for ARQ protocols used with binary unidirectional channels are described. The proposed schemes can correct up to [t/2] unidirectional errors using t-unidirectional error detecting codes and code combining with a much smaller number of retransmissions. First, we show how to do code combining for unidirectional errors. To use code combining with unidirectional codes, we need to identify the type of error (0rarr1 or 1rarr0) from the received word. We show how this can be done for various unidirectional codes

Published in:

Computers, IEEE Transactions on  (Volume:56 ,  Issue: 4 )