| 摘要 |
Provided are an online indication method, device and system. The method comprises: an online state of each PU in a designated area is checked; and if there is an offline PU, indication information is sent to the offline PU, wherein the indication information is used for indicating to the offline PU to automatically start online. By means of the invention, offline PUs within a certain area may be found according to physical location information of the PUs, and then the above-mentioned offline PUs are triggered by the indication information to be automatically online, so that the problem in the related art that the PUs cannot automatically start online in the case of emergency after being offline is solved, and thus, there is no need for users to start the PUs manually. |
