A method is disclosed, comprising receiving a first connection request from a device, and in response to receiving the first connection request from the device, connecting to and sending a first confirmation message to the device. The method includes receiving a set of one or more packet fragments from the device, buffering the set of packet fragments, and sending a packet-receipt confirmation to the device. The method includes sending a second connection request to a central node server and receiving a second confirmation message from the central node server. The method includes, in response to receiving the second confirmation message, combining the set of packet fragments into one or more data packets, sending the combined data packets to the central node server, and receiving a second packet-receipt confirmation from the central node server, and in response to the second packet-receipt confirmation, deleting the first set of buffered packet fragments.