Abstract: According to embodiments of the present invention, devices and methods for requesting information from a target unit and/or for supplying information to a requesting unit are provided. The devices may include one or more modules such as a transmitting module, a processing module, a processor and a memory. A data stream including a request for information may be broadcast. A return data signal may be broadcast including an identifier information based on at least a portion of the data stream, and information corresponding to the request. According to further embodiments of the present invention, there may also be provided applications adapted to be installed on a device, and computer programs and computer program products.

Abstract: According to embodiments of the present invention, devices and methods for controlling a target unit, and devices and methods for execution of an instruction in a data stream broadcast by an instructing unit are provided. The devices may include one or more modules such as a processing module, or a processor and a memory. A data stream including an identifying information for verification by the target unit and an instruction to the target unit for controlling the target unit may be broadcast. From the data stream that is received an identifying information included in the data stream may be assessed, and where verified, the instruction included in the data stream may be executed. According to further embodiments of the present invention, there may also be provided applications adapted to be installed on a device, and computer programs and computer program products.

Abstract: A signal processing method includes: fetching an encrypted identifier of a controlled apparatus; filling the encrypted identifier into a device identification field of a data format of a control signal; generating an encrypted time code according to system time and an adjusting code of a controlling apparatus; filling the encrypted time code into a time identification field of the data format; generating a control signal having both device identification field and time identification field; receiving the control signal and fetching both device identification field and time identification field; comparing the device identification field with a predetermined device identification field; comparing the time identification field with the predetermined time identification field if the device identification field is equal to the predetermined device identification field; and executing an operation corresponsive to the control signal by the controlled apparatus if the time identification field is greater than the pre