Lecture #14: Local Area Networks ALOHA Ethernet Token Ring ...
Lecture #14: Local Area Networks ALOHA Ethernet Token Ring ...
Lecture #14: Local Area Networks ALOHA Ethernet Token Ring ...
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CSMA / CD details<br />
�� After a station detects a collision, it aborts its<br />
transmission, waits a random period of time, and then<br />
tries again, assuming that no other station has started<br />
transmitting in the meantime. The CSMA/CD model<br />
will consist of alternating contention and<br />
transmission periods, with idle periods occurring<br />
when all stations are quiet.<br />
�� Suppose that two stations both begin transmitting at<br />
exactly time t0. . The minimum time to detect the<br />
collision is then just the time it takes the signal to<br />
propagate from one station to the other.<br />
21
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