| 摘要 |
PROBLEM TO BE SOLVED: To provide portable radio equipment capable of displaying remaining communication time and communication contents. SOLUTION: When the timeout time of communication sequences 301, 302 and 303 is respectively defined as 30 sec, 10 sec and 10 sec, a total sum S of timeout time is 50 sec. The reference value of remaining time is defined as 50 sec and picture display is performed for the remaining time of 50 sec at the time of communication start (311). Portable radio equipment 3 calls a wireless handset 5. When calling is received, the wireless handset 5 transmits a telegraphic activation message to a meter 7. When the telegraphic activation message is received, the meter 7 transmits a telegraphic response message through the wireless handset 5 to the portable radio equipment 3 (301). Then, the remaining time is displayed second by second like '50 sec', '49 sec'.... In this case, when the real communication time of the communication sequence 301 is 25 sec, at this time point, the total of the timeout time of the communication sequences 302 and 303 is defined as remaining time. Therefore, 25 sec is displayed as remaining time (312) and in the next moment, 20 sec is displayed as remaining time (313). Afterwards, similar display is performed in the communication sequences 302 and 303 as well.
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