| 摘要 |
<p>A communications system 10 to wirelessly transmit a data file 17, 19, 21 to a network node 50, the system comprising: a higher bandwidth first communications channel 30 for transmitting data; a second cellular communications channel 40 to transmit and receive data, the channel capacity of the second communications channel 40 being less than the channel capacity of the first communications channel 30; broadcasting over the first communications channel 30, a data file 17, 19, 21, to be received by at least one network node 50; confirming whether or not the data file was received over the second communications channel 40; and if not, broadcasting the data file to the network node 50 over the second communications 40 channel. Can be used in a telemeter environment for updating software, firmware or tariff information to utility smart meters. First network may be Digital Audio Broadcast (DAB). Second network may be Long Range Radio (LLR).</p> |
