问题描述：
英语翻译
We wish to send a packet whose length before any coding is b
bits,after coding it using a rateless code.The decoding CDF for the
rateless code specifies P(n>·),the probability that decoding will
be successful after receiving n symbols.
Consider a general transmission schedule for reliable delivery.
The sender first transmits n1 symbols,then pauses for feedback.If
decoding fails,the sender transmits n2−n1 symbols before pausing
a second time.In sum,before the ith pause,the sender transmits
ni symbols.We seek an assignment of values to n1,n2,...that
minimizes the average time spent delivering each b-bit packet.
We wish to send a packet whose length before any coding is b
bits,after coding it using a rateless code.The decoding CDF for the
rateless code specifies P(n>·),the probability that decoding will
be successful after receiving n symbols.
Consider a general transmission schedule for reliable delivery.
The sender first transmits n1 symbols,then pauses for feedback.If
decoding fails,the sender transmits n2−n1 symbols before pausing
a second time.In sum,before the ith pause,the sender transmits
ni symbols.We seek an assignment of values to n1,n2,...that
minimizes the average time spent delivering each b-bit packet.
问题解答：
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