Test 4: Deferral Test for 20 and 40MHz BSSs Assumptions: All devices are within energy detect of each other. When AP1 and AP2 start to transmit on the same slot, both packets are lost (PER= 100%). Otherwise packets get through 100%. PER=0 % Note: AP1 and AP2 should defer to each other. The only packet loss is due to collisions when backoffs periods of AP1 and AP2 end at the same time Parameters: MSDU length:[ 2000Bytes] RTS/CTS [ OFF, ON] MCS = [0] Procedure: AP1 traffic to STA1 on a 40MHz channel with a full buffer continuously.. All other setting is the same as test case 2a. AP2 sends traffic to STA2 on a 20MHz channel staing at t1, which is located at the secondary channel of BSS1. The traffic is based on the Poisson distribution with following parameters. MSDU length at 2000Bytes. Let lambda, for example, to be 100 ( in the unit of 1/second) The mean time is 1/100 second. The long time average data rate for the largest MSDU size is 2000*8/(1/100)=1.6Mbps 1.6 Mbps is non-full buffer traffic since it is lower than the 20MHz BSS MCS0 rate
Test 4: Deferral Test for 20 and 40MHz BSSs Assumptions: All devices are within energy detect of each other. When AP1 and AP2 start to transmit on the same slot, both packets are lost (PER= 100%). Otherwise packets get through 100%. PER=0 % Note: AP1 and AP2 should defer to each other. The only packet loss is due to collisions when backoffs periods of AP1 and AP2 end at the same time Parameters: MSDU length:[ 2000Bytes] RTS/CTS [ OFF, ON] MCS = [0] Procedure: AP1 traffic to STA1 on a 40MHz channel with a full buffer continuously.. All other setting is the same as test case 2a. AP2 sends traffic to STA2 on a 20MHz channel staing at t1, which is located at the secondary channel of BSS1. The traffic is based on the Poisson distribution with following parameters. MSDU length at 2000Bytes. Let lambda, for example, to be 100 ( in the unit of 1/second) The mean time is 1/100 second. The long time average data rate for the largest MSDU size is 2000*8/(1/100)=1.6Mbps 1.6 Mbps is non-full buffer traffic since it is lower than the 20MHz BSS MCS0 rate