Problem 2: Two stations A and B located within the same collision domain are backlogged and...

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Problem 2: Two stations A and B located within the same collision domain are backlogged and always have a packet to send. They use the the DCF function of 802.11 to mediate access to the wireless medium. 1. Plot the probability of a collision on the next transmission round as a function of the contention window CWo. Let the contention window vary from 4 to 2048. 2. Assume that after several successive collisions and the contention window at A and B has become equal to 16. Let A win the next round by selecting a backoff equal to zero. What is the probability that B will win the contention in the subsequent round, given that CWo = 4? 3. Assume that after several successive collisions, the contention window at A and B has become equal to 64. Let A win the next round by selecting a backoff equal to zero whereas B selects a backoff of 23. What is the least number of successive transmissions that A is guaranteed before B has a chance to capture the channel, given that CWo = 4? Problem 2: Two stations A and B located within the same collision domain are backlogged and always have a packet to send. They use the the DCF function of 802.11 to mediate access to the wireless medium. 1. Plot the probability of a collision on the next transmission round as a function of the contention window CWo. Let the contention window vary from 4 to 2048. 2. Assume that after several successive collisions and the contention window at A and B has become equal to 16. Let A win the next round by selecting a backoff equal to zero. What is the probability that B will win the contention in the subsequent round, given that CWo = 4? 3. Assume that after several successive collisions, the contention window at A and B has become equal to 64. Let A win the next round by selecting a backoff equal to zero whereas B selects a backoff of 23. What is the least number of successive transmissions that A is guaranteed before B has a chance to capture the channel, given that CWo = 4?

Answer rating: 100% (QA)

To solve these problems well use the Binary Exponential Backoff algorithm used in the IEEE 80211 Dis... View the full answer