Patent ID: 8200227

Claim:
A method for resuming data transmission in a data transmission system including multiple information processing units and at least one mobile device, the multiple information processing units and the mobile device each including a wireless communication component, the method comprising: transmitting data, by a first one of the multiple information processing units, to the mobile device; recording a transmission status of the mobile device, the transmission status including information regarding an unfinished data transmission by the first information processing unit to the mobile device, and the recording comprising the first information processing unit sending the transmission status to at least one other information processing unit of the multiple information processing units; and resuming transmitting data relating to the unfinished data transmission, by a second one of the multiple information processing units, to the mobile device based on the recorded transmission status, wherein resuming transmitting the data comprises: determining whether the mobile device has registered a valid ID; sending, if it is determined that the mobile device has not registered a valid ID, an authentication program to the mobile device to authenticate the mobile device; and resuming transmitting the data to the mobile device in a push mode or in a pull mode and, if the second one of the multiple information processing units serves more than a predetermined number of mobile devices, further using a polling method to transmit the data to the mobile device; wherein the first one of the multiple information processing units receives a data file including the data to be transmitted and, if the data file is greater than a predetermined size, slices the data file into multiple segments and transmits at least one of the segments to at least one of the multiple information processing units.