Question

Explain what happens when two Transmitters transmit to two different Receivers, whereby the
two receivers are within range of both transmitters (i.e. would the two transmissions be successfully
received or not? Why?). Assume that the two transmitters are within range of each other. Answer
the above for the following two cases:
i. One of the transmitters uses the same frequency channel to transmit, using CSMA, while the other is transmitting.
ii. The two nodes use the same frequency channel to transmit RTSs at the same time using CSMA/CA.

Answer 1

Hey, here's your solution, if you liked the answer please give a like to answer, so lets begin

Now, let's discuss both the conditions one by one.

i)

1. When two transmitters are transmitting the message using the same communication channel then,
2. there are high chances that there would be collision between the message packets that are being transmitted.
3. This is because only one transitter can transmit the messge over a communication link in a network at a time
4. otherwise there would be a collision if some collision resolution technique is not used.
5. So if you are using the same link then you should use some collision resolution techniques to avoid it.

Now, let's discuss the second condition.

ii)

1. In this case since carrier sense multiple access (CSMA) is used.
2. Therefore, there will not be any collisions with among the messages, hence there would not be any collision.
3. Actually CSMA works in a different way as it works by sensing if the communication link is free to be used or not.
4. if it free only then, a transmitter can transmit the messages over the communication link
5. Otherwise it can't sent it over the link.
6. This is the way actually we use CSMA for our betterment.

In this way, even when the number of transmiiters are trying to send the messages over the same communication link, they can transmit without any collision.

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