Abstract: Methods and systems for improved accuracy in generation of charging data associated with packet data exchange over a wireless communication system network. Features and aspects hereof provide for periodic acknowledgment of packet data exchanged over a wireless communication network exchange between a wireless communication network and a packet data core network and to thereby permit accurate generation of charging information. Periodic acknowledgement messages are returned from the wireless communication network to the packet data core network with negligible impact on the performance of the communication link. Features and aspects hereof are particularly useful to enhance the accuracy of charging information for packet data in a 3GPP compatible wireless communication system.