In many protocols, repeated failures result in remedial action, which may mean kicking the process to a higher level in the protocol hierarchy. Under the assumptions of Exercise 2.5(a), what is the probability that there are
(a) Exactly two retransmissions
(b) More than two retransmissions?
In a block of 1024 bits using error-correcting codes, single-bit errors can be corrected; all other error patterns can be detected.
(a) If Pe = 10-4 and bit errors are independent, what is the probability of retransmission?
(b) Plot the probability of block retransmission as a function of bit error probability.
(c) Now suppose that up to two errors can be corrected; repeat (b) on the same chart.
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