Many people on the 3rd floor of BRC building told me that their wifi (ubcsecure) keeps getting disconnected. I had the same problem, so I have asked UBC IT services for help.

IT services suggested me to do the following steps:

1)remove ubcsecure network from the wifi option
2)connect to ubcvisitor and go to autoconnect.it.ubc.ca to run the tool
3)ubcsecure is created automatically
4)reconnect to ubcsecure

Now it is working for me.
I hope it would work for everyone else in the building.