So this has happened in my case as well!
I had applied for visa and it came late. So I had to defer my admission to January 2017, I was worried so I went to the embassy here in Delhi.
They basically said that the sticker we get on our passports are TRV which is mandatory to enter Canada. And then we are at the airport they'd issue a Study permit and study permit will be issued according to the deferred date on your letter of acceptance from university or college. You can travel on this TRV.
If you guys have any other query regarding this feel free to contact me +919810016267.