How to simulate CSMA-CA algorithm in MATLAB? There are several nodes in the network with its own state. For example, some node may be sending the data at the start of the simulation, some other nodes may be waiting to send the data, some nodes may be idle, some nodes may be waiting for ACK, etc. When some node is sending the data, at the same time the other nodes may be changing the state. Computer programs run sequentially. How it is possible to update the states of other nodes or back-off counters etc. at the same time when the transmission of data of a node is going on?
Of course, this is easy in NS2. But I am not at all familiar with NS2.
dear dr sanghvi
please check out the attachment if it is helpful for you.
thank you
Hello,
this is not too difficult. You might do some search about how all simulation programs (e.g. SPICE, FPGA timing simulators) are doing it:
1. Define the time increment of your analysis/simulation: short enough to allow for sufficient time resolution, long enough as not to get excessive simulation times.
2. Run one iteration of your net (all nodes) per time increment. The sequence of the nodes does not really matter - there is always an uncertainty of 1 time increment.
Regarding the "CSMA-CA": are you trying to simulate a CAN network ? If so, it is important to take the signal delays due to line lengths into consideration. But a time resolution of tq/16 should suffice for all circumstances. Maybe you can even reduce the time resolution 'til tq/4, but I'd start with tq/16.
Wish you success - and have fun!
Hi Dr. Sanghvi,
Were you able to find a solution for your question by using Matlab?
Muharrem
No. It was my student's project. He changed the topic and finished the project. Thank you for taking interest in the question.
Thank you for taking interest in the question. It will be really useful. It says that a Java thread is needed because in MATLAB, it is not possible.
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