Transportation Protocols: UDP, TCP & RTP
Transportation Protocols: UDP, TCP & RTP
Transportation Protocols: UDP, TCP & RTP
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Adaptive Retransmission AlgorithmLecture 11• Timeout should be based on round trip time (RTT)• Sender can't know RTT of any packet before transmission• Sender picks retransmission timeout (RTO) based on previous RTTs• Specific method is call adaptive retransmission algorithm• Weighted average for RTT:RTT(n+1)= α RTT(n) + (1-α)RTTnwhere RTTn is RTT of the nth segment• Computation of RTORTO(n+1)= β RTT(n+1)where 0< α