Abstract: A test device for a detector for detecting gas or a gas/particle mixture, includes a joining means for joining the test device to the detector; a container configured so as to receive a gas or a test gas/particle mixture; a diffusion means associated with the container and designed to diffuse the gas or the test gas/particle mixture in the detector; an energy source; and a radio apparatus able to manage local radio communication in order to remotely trigger the diffusion of the gas or of the test gas/particle mixture in the diffusion means from a control means. A test system comprising at least one test device, at least one radio gateway, a control network comprising a control unit able to remotely control the test device and at least one communication link between the control unit and the radio gateway, said gateway being able to connect the radio apparatus and the control network.

Abstract: A method for allocating resources for a spread-spectrum communication system includes a plurality of communicating devices able to communicate with a server via at least one network access gateway, the method comprising the steps of: measuring a quality metric of the communication link for each communicating device over a given time window, determining at least one statistical indicator of the signal-to-interference ratio between each pair of communicating devices based on the quality metric, allocating each communicating device a spreading factor and at least one time slot to communicate, in accordance with a coexistence criterion dependent on the spreading factor and on the statistical indicator of the signal-to-interference ratio, the time resources being organized in the form of super-frames comprising first communication slots wherein several devices are able to communicate simultaneously using different spreading factors and second communication slots wherein several devices are able to communicate sequ

Abstract: A test device for a detector for detecting gas or a gas/particle mixture, includes a joining means for joining the test device to the detector; a container configured so as to receive a gas or a test gas/particle mixture; a diffusion means associated with the container and designed to diffuse the gas or the test gas/particle mixture in the detector; an energy source; and a radio apparatus able to manage local radio communication in order to remotely trigger the diffusion of the gas or of the test gas/particle mixture in the diffusion means from a control means. A test system comprising at least one test device, at least one radio gateway, a control network comprising a control unit able to remotely control the test device and at least one communication link between the control unit and the radio gateway, said gateway being able to connect the radio apparatus and the control network.

Abstract: A method for allocating resources for a spread-spectrum communication system includes a plurality of communicating devices able to communicate with a server via at least one network access gateway, the method comprising the steps of: measuring a quality metric of the communication link for each communicating device over a given time window, determining at least one statistical indicator of the signal-to-interference ratio between each pair of communicating devices based on the quality metric, allocating each communicating device a spreading factor and at least one time slot to communicate, in accordance with a coexistence criterion dependent on the spreading factor and on the statistical indicator of the signal-to-interference ratio, the time resources being organized in the form of super-frames comprising first communication slots wherein several devices are able to communicate simultaneously using different spreading factors and second communication slots wherein several devices are able to communicate sequ

Abstract: A wireless local network and method integrating the locating and the seamless roaming of mobile nodes. The network includes a server constituting the core of the network, fixed access points providing the low-level protocol, fixed anchors providing the locating function and nodes comprising sensors and actuators according to the end purpose of the network. The fixed anchors determine a distance measurement with the nodes by time of flight of radio waves, with the nodes behaving as an active radio deflector.

Abstract: Wireless local network integrating the locating and the seamless roaming of mobile nodes. The device of the invention is comprised of a server (110) constituting the core of the network, fixed access points (120) providing the low-level protocol, fixed anchors (140) providing the locating function and nodes (140) comprising sensors and actuators according to the end purpose of the network. The regrouping of the upper network layers at the physical layer in the server allows for a seamless roaming and an approximate locating of the nodes by the network at each frame transmitted. The denser anchor network allows for a precise locating of the nodes, upon request, thanks to a distance measurement by time of flight of radio waves, with the nodes then behaving as an active radio deflector.