How Can I DOS on All the Hosts in an AP?

In my college there's a AP for students.. and i have tried doing DOS

to particular host using hping3,scapy,nping. and it works fluent.

But i am not getting how can i DOS everyone who is using the AP except me. I tried doing DOS on the router, but doesn't work , they have sonic wall router with built in firewall.

Please let me know how to DOS everyone in the AP except me.

Thank you in advance.