How can I fix the Host connection in Call of Duty: Black Ops for PS3?

In most cases, it's your Internet Connection, or sometimes even other people's connection can end an entire match if the user is the host. Try restarting your router. This way, it will delete all the cookies stored up. Also, don't use any other electronic that uses the Internet while your playing. This can also slow down the speed. When you restart the router, keep it off for 2 minutes.