APNS issue?

Who knows how APNS heartbeat specific interaction, the size of a heartbeat?

Also, if the phone QQ with APNS push message:
1, what between the server and the mobile phone QQ QQ client heartbeats news?

2, all the QQ message, as are APNS QQ QQ messaging between users to push, or only certain messages through APNS push?

3 different applications at the same time the message reaches the APNS to the same phone, these messages are sent to the mobile phone in the distribution, or line up in order to send?




Reply:
Add this:
I said above APNS heartbeat heartbeat APNS between mobile terminals and servers, only that 15min time? That is how specific it? Is the size of the message, every beat of the specific content of the message, what is it?
If anyone knows, please reply to me, okay? Grateful