| 摘要 |
Communicating commands and/or data to a remote controller, such as a programmable logic controller, coupled to a cellular communications device by sending multiple pages via a cellular network control channel of a cellular mobile radiotelephone system. Each cellular communications device operating within the coverage area of the cellular mobile radiotelephone system can monitor the cellular network control charnel for a pair of target pages within a first time period. Each target page includes a specific identifier assigned to one or more of the cellular communications devices. In the event that a cellular communications device receives target pages having a matching specific identifier, the device will monitor the cellular network control channel over a second time period for at least one command page or data page carrying instructions or information for use by the remote controller. The cellular communications device can respond to the reception of one or more command or data pages by forwarding the instructions or information to the controller via a communications link. In addition, the cellular communications device can acknowledge receipt of the data or command pages by issuing an acknowledgment signal formatted as an Autonomous Registration signal via the cellular network control channel.
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