XMPP about background pending message reception, background message push, local send notification

Want to ask, in the XMPP IM project, my program if hang up, backstage have news come over, my side of push not come over, so my notice will not receive the message, when I re-wake the application, he will receive notice, the message will be pushed over, I in plist where set up his telephone service, Because it is a long connection will not sleep, but I was on the shelves AppStore will be rejected, said I did not realize the service. is Required background modes this service, but as long as I use this service, he will have to realize the call function, I do not have this feature in the project, do not know how to solve the background hangs do not let him go to sleep state, and so received backstage messages, he will immediately send a notice to come over, Ask for answers. Thank you..

XMPP about background pending message reception, background message push, local send notification