Sliding Window Protocol Program in Cīelow is the simulation of sliding window protocol in C. Go back n: Sender transmits all frames present in the window that occurs after the error bit including error bit also. Stop-and-Wait is a simple protocol used for transmitting data between two devices over a communication channel.
Now the efficiency of Go-Back-N ARQ N/(1+2a), where a tp/tt. Selective Repeat: Sender transmits only that frame which is erroneous or is lost.Ģ. Sender window size (WS): In Go-Back-N ARQ Protocol, N is the sender window size, which we can see in the above example was 5.Now, here N should be greater than 1 in order to implement pipelining.If N1, then our system reduces to the Stop & Wait protocol. In sliding window protocol the receiver has to have some memory to compensate any loss in transmission or if the frames are received unordered.ġ. If receiver sends a collective or cumulative acknowledgement to sender then it understands that more than one frames are properly received, for eg:- if ack of frame 3 is received it understands that frame 1 and frame 2 are received properly. If window size=w then after sending w frames sender waits for the acknowledgement (ack) of the first frame.Īs soon as sender receives the acknowledgement of a frame it is replaced by the next frames to be transmitted by the sender.
SCADA Tutorial 31 - Dynamic Data Exchange DDE | SCADA Communication Protocolīoth sender and receiver agrees on some window size.