Abstract: Various embodiments of the teachings include a method for subscription-based IoT communication security. An example method includes: receiving a subscription request for a service of an Industrial Internet of Things (IIoT) device from an edge device; generating a master key and key parameters for the subscription request; deploying the key parameters to the IIoT device; generating a private key with constraint based on the master key, the key parameters, Identifier (ID) information of the IIoT device, and a usage constraint parameter for subscription range, and sending the private key with constraint to the edge device; encrypting, at the device, a message based on the key parameters, the ID information of the device, and a current usage parameter, and sending an encrypted message to the edge device; and decrypting it using the private key with constraint when the current usage parameter of the message is valid for the usage constraint parameter.

Abstract: Various embodiments include a data acquisition method including: generating a list of data points to be acquired from a field device; and performing the following separately for each data point. Parsing an address, and determining values of a region type, a DB offset, a byte offset and a bit offset in the address; using a first rule to calculate a sorting indicator of the data point according to the values determined; using a second predetermined rule to calculate a grouping indicator of the data point according to the determined values; sorting all of the data points according to the sorting indicators; dividing all of the sorted data points into multiple groups on the basis of the grouping indicator and a byte length of each data point and the length of a protocol data unit of the field device; and sending a data request for each group to the field device.

Abstract: Disclosed are an augmented reality method and device for simulating a wireless signal. The method includes: capturing an environment, and forming a three-dimensional virtual representation of the environment; determining a parameter related to a virtual wireless device, the virtual wireless device being a virtual wireless signal source or a reflector; positioning the virtual wireless device in the environment, and simulating virtual wireless signal coverage in the three-dimensional virtual representation of the environment according to the positioning, the parameter, and the three-dimensional virtual representation of the environment; and adding, to the environment, a marker representing the virtual wireless signal coverage to serve as an augmented reality image for display.

Abstract: Disclosed are an augmented reality method and device for simulating a wireless signal. The method includes: capturing an environment, and forming a three-dimensional virtual representation of the environment; determining a parameter related to a virtual wireless device, the virtual wireless device being a virtual wireless signal source or a reflector; positioning the virtual wireless device in the environment, and simulating virtual wireless signal coverage in the three-dimensional virtual representation of the environment according to the positioning, the parameter, and the three-dimensional virtual representation of the environment; and adding, to the environment, a marker representing the virtual wireless signal coverage to serve as an augmented reality image for display.