| 摘要 |
The system includes a number of first meters, which are typically battery powered transmit only devices. The system includes a number of two-way meter s, which are operable to both transmit and receive data. The first meters transmit their data to the collector either directly or indirectly via the t wo- way meters, which serve as intermediaries. Multiple records from each first meter may be stored at each of the two-way meters, thereby ensuring that records from a one-way meter will not be blocked when an attempt is made to forward them to the collector. Furthermore, multiple records from each first meter may be stored at the collector, thereby enabling the transmission and storage of meter records in a number of different formats. Additionally, records from each first meter are marked to reflect a sequence in which they are generated, thereby ensuring that the collector will store the most recen t data records available.
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