[Solved]Wifi Systems Nodes Adopt Csma Mac Protocol Access Shared Media Contention Beginning Cwmin Q37124023
In WiFi systems, nodes adopt CSMA MAC protocol to access to the shared media through contention. At the beginning, CWmin # 31 meaning that there are 32 slots available for users. Answer the following questions. (All answers limit to 1-2 sentences please.) 1) At the beginning, if node A pick up the back off counter BO-10, what is probability to win the channel contention ? However, after 3 slots node A detected that some other node began to sent package. Does node A has a better chance to win the contention in next round? Consider the two cases that there are n#2and n”, 3 active users, respectively node A do at this moment and Why? is the range of throughput at this moment? Finally, node A won the channel content and sent package but did not get ACK after SIFS. What did )Assume that there is one active user, n -1. The packet size is 1024bytes and date rate 24Mbits/s. What ) If we define the fairness as the ratio of the number of packets delivered by a user and the total ones by all users, for the case having 12 active nodes, what is the fairness coefficient? Is the IEEE 802.11 DCF a fair protocol 7 How does the protocol realize it. Show transcribed image text In WiFi systems, nodes adopt CSMA MAC protocol to access to the shared media through contention. At the beginning, CWmin # 31 meaning that there are 32 slots available for users. Answer the following questions. (All answers limit to 1-2 sentences please.) 1) At the beginning, if node A pick up the back off counter BO-10, what is probability to win the channel contention ? However, after 3 slots node A detected that some other node began to sent package. Does node A has a better chance to win the contention in next round? Consider the two cases that there are n#2and n”, 3 active users, respectively node A do at this moment and Why? is the range of throughput at this moment? Finally, node A won the channel content and sent package but did not get ACK after SIFS. What did )Assume that there is one active user, n -1. The packet size is 1024bytes and date rate 24Mbits/s. What ) If we define the fairness as the ratio of the number of packets delivered by a user and the total ones by all users, for the case having 12 active nodes, what is the fairness coefficient? Is the IEEE 802.11 DCF a fair protocol 7 How does the protocol realize it.
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