Ping is related to your connection through the internet to Anet's servers. If you have something else using the internet close the program. It could also be a temporary bad connection somewhere between you and Anet. If the ping is constantly high you might want to shop for a better ISP.
What type of router do you have and what type of network card is installed in your computer? Do you have the option to run an ethernet cable to your computer?
The cause of your high ping is due to your wireless, most likely.
I'm not really sure it's the ISP. My old computer has a slow processor, low RAM, and an old video card. My ping goes up really high (in the thousands). When I got my new computer, it doesn't do that. I didn't change my ISP.
