Dear Sir;
Thanks for your kind reply ,after reading above examples I found that it is done by
(Line no 92 in 80211e-txop.cc)
but the same call for method "Set" not found in other tutorials like third.cc
I tried lot of times to explore YansWiFiHelper and other relevant classes but unable to understand that how channel was assign in third.cc.
Requesting you to please explain same.
Regards
Manish Puraswani