基于JSON - Android Studio数据的通知

I'm developing Android Application. I'm downloading data in JSON using Volley. Now I would like to do something like this: application, even when closed is downloading data once in 5 minutes, then checking and if some value is above certain level then it's sending notification to the user. I'm sure that there is plenty about it in internet, but I'm not sure where and about what should I search? Services?I'm developing Android Application. I'm downloa