Hiii.. I am trying to do csma cd by using sim events.. In the project i need to transmit a packet with 10 time slots in a frame . can any one help me with these ( In a frame i need to have 10 slots)

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ashok 2015-11-29

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评论： Walter Roberson 2015-11-29

采纳的回答： Walter Roberson

I need to know the packet format order .

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Answer 1

Walter Roberson 2015-11-29

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Do you mean Carrier Sense Multiple Access (CSMA) with Collision Detection (CD)? If so, then packets do not carry time slots "in" a frame. Packets might last 10 time slots, but that is going to depend how you define time slots.

Packets take up time on the wire, and those times in CSMA are described in terms of "bit times" for standards later than 10Base2 (where it was standardized as particular lengths of times that just happened to be the easily multiples of bit times.) A "bit time" is the time required to transmit one bit. Ethernet packets are required to be at least 64 bytes excluding the preamble of 7 bytes. Packets must last at least (64+7)*8 = 568 bit times.

Ethernet does not have time reservations, so it does not talk about "time slots". Perhaps some other CSMA/CD protocol talks about time slots.