| 摘要 |
<p>A monitoring system comprises a center device and a plurality of terminal devices. The center device is configured to return a first answer when receiving a first request from a terminal device. If the center device has a second request to at least one of the other terminal devices at this time, the center device allows the second request and identification information relating to the corresponding terminal device to be included in the first answer. When receiving the first answer, the terminal device transfers the second request to the corresponding terminal device.</p> |
