T. Uyematsu et al., PERFORMANCE EVALUATION AND IMPROVEMENTS OF ARQ SCHEMES FOR OPTICAL COMMUNICATION, Electronics and communications in Japan. Part 3, Fundamental electronic science, 77(6), 1994, pp. 36-46
The optical communication system can provide highly reliable and large
-capacity transmission. It is becoming important as the major technolo
gy of highspeed digital communication. In the optical communication sy
stem, even though it is highly reliable, inevitably the bit error rate
is deteriorated with the increase of the transmission rate or the rep
eater distance. It is anticipated that some methods of error control w
ill be required in the future. This paper discusses the application of
the automated repeat request (ARQ) scheme, which is one of the error
control methods, to the optical communication. It is noted first that
the error that occurs in the optical communication channel is the tran
sition from symbol ''1'' to ''0,'' but it can never be the transition
from ''0'' to ''1''. An ARQ scheme is proposed using the m-out-of-n co
de which can detect any error in such a channel. A performance evaluat
ion is presented based on the throughput and the information efficienc
y per photon. It is shown as a result that the SR+GBN scheme is the be
st among various ARQ schemes from the practical viewpoint. It combines
selective-repeat (SR) and go-back-hr (GBN). Then a new error-detectin
g scheme is proposed based on the characteristics of the optical chann
el, which can reduce the number of repeats of the codeword. It is show
n that, by combining the proposed scheme with SR+GBN, a higher through
put can be achieved.