| 摘要 |
When the user of a portable radio apparatus performs an operation for transmitting data outside a communication service area, the data to be transmitted is compressed in a compression section 6, and stored in a compressed data memory 13. When the user moves within the communication service area, the stored compressed data is automatically transmitted. On the other hand, when destination information for the transmitted data already exists, only the transmitted data is added to the destination information already registered, and transmitted in a batch. Alternatively, if the destination has a function for decompressing compressed data, the compressed transmitted data is transmitted in a batch, while, if the destination does not have the function for decompression compressed data, the compressed transmitted data is decompressed and transmitted.
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