User Tools

Site Tools


assignment-1

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
assignment-1 [2008/09/15 11:11]
shravan
assignment-1 [2008/09/15 11:12] (current)
shravan
Line 139: Line 139:
 ==== Analyzing the wireless traces ==== ==== Analyzing the wireless traces ====
  
-Your captured trace has packets sent by multiple wireless nodes. You need to first filter out the packets sent by the AP. To do that use the ''​wireshark''​ tool. For this set the filter to ''​(ip.src == AP-IP && udp)''​. Count the total number of UDP packets (''​TOTPKTS''​) sent by the AP. Now, in order to compute the wireless loss rates, find out how many of these packets have ''​retry''​ bit set in them. For this set the filter to ''​ (ip.src == AP-IP) && udp && !(wlan.fc.retry == 0) ''​ and count the number of retries (''​RETX-PKTS''​). We can now compute the wireless loss rate using ''​ RETX-PKTS/​TOT-PKTS''​+Your captured trace has packets sent by multiple wireless nodes. You need to first filter out the packets sent by the AP. To do that use the ''​wireshark''​ tool (Open using ''​wireshark <​trace-file-name>''​). For this set the filter to ''​(ip.src == AP-IP && udp)''​. Count the total number of UDP packets (''​TOTPKTS''​) sent by the AP. Now, in order to compute the wireless loss rates, find out how many of these packets have ''​retry''​ bit set in them. For this set the filter to ''​ (ip.src == AP-IP) && udp && !(wlan.fc.retry == 0) ''​ and count the number of retries (''​RETX-PKTS''​). We can now compute the wireless loss rate using ''​ RETX-PKTS/​TOT-PKTS''​
assignment-1.txt ยท Last modified: 2008/09/15 11:12 by shravan