Abstract:
A USN protocol analysis device for using an XML schema is provided to analyze a plurality of channels and analyze various protocols about XML by analyzing the protocol by using the USN protocols. A packet analyzer(100) collects a packet which communications with sensor nodes of USN(Ubiquitous Sensor Network) through a channel. A protocol analyzer(110) uses XML(eXensible Markup Language) schema defined according to USN protocol by processing the collected packet. The packet analysis unit includes a transceiver. The packet is collected by using the transceiver.
Abstract:
A USN(Ubiquitous Sensor Network) system using a multichannel having different radio wave strengths and a method for configuring the same are provided to reduce beacon transfer delays and easily make time synchronization between sensor nodes by configuring a sensor field using both a control frequency having a large output and a data frequency having a smaller output than the control frequency. A USN system using a multichannel having different radio wave strengths comprises a sink node and a sensor node. The sink node communicates with the sensor node with one or more frequencies having different outputs. The sensor node communicates with the sink node with the frequencies. The sink node comprises the first output part(310) and the second output part(320). The first output part(310) outputs control data at a frequency for a control channel to control the sensor node. The second output part(320) outputs data at a frequency for a data channel to transmit and receive data with the sensor node.
Abstract:
Provided is a method for communication between access points (APs) and for a user agent (UA)'s selecting an AP and establishing a connection by which in establishing a connection between a wireless LAN AP providing a wireless LAN service and the UA in a public wireless LAN service utilizing a wireless LAN technology, a maximum efficiency of the AP a maximum performance of the UA can be obtained. According to the method, the number of user agents connected to a current AP and the amount of traffic being currently processed are compared with the maximum capacity of a neighboring AP and the number of user agents connected to and being serviced by the neighboring AP, to recommend an optimum AP to the user agent. By doing so, the user agent is allowed to comprehensively review information on the number of user agents connected to an adjacent AP and the amount of traffic being processed by the AP as well as reception sensitivity, and then to select an optimum AP.
Abstract:
The present invention relates to a fishing net moving device of cultured species which allows cultured species to actively move as they grow thereby reducing stress according to artificial movement and lowers decline in growth and a disease incidence rate. A fishing net moving device of cultured species comprises: an attracting device installed to move cultured species in the fishing net to a fishing net at the other side; a movement access net installed between the fishing net and the other side fishing net, a movement passage door installed at the center of the movement access net; a measurement unit for measuring a size of the cultured species; and a control device to open the movement passage door if the size of the cultured species is more than a determined value.
Abstract:
PURPOSE: A movable environment controlling apparatus is provided to consider the condition of the plants in a greenhouse and not the work time for obtaining minimum space for controlling the environment of the greenhouse. CONSTITUTION: A controlling node(20) is installed at a ceiling part. A movable part is installed between a ceiling part and a frame(5) for the ceiling of the greenhouse to have a pulley(41) which moves up and down. The controlling part operates the movable part according to the set conditions so that the space for controlling the environment of the greenhouse which is controlled by the controlling node is controlled by moving the ceiling part up and down. [Reference numerals] (42) Motor; (AA) Boiler 1
Abstract:
PURPOSE: An apparatus for managing a controlling node, a method for the same, a growing environment sensor network system using the same are provided to reduce the overhead of a data frame by managing data for the controlling node at a separate server. CONSTITUTION: A data analyzing part(31) analyzes data collected from a sensor node. The data analyzing part selects a controlling node containing a controlling device to be controlled. A server accessing part(32) communicates with a managing server(50) saving and managing metadata. A metadata acquiring part(33) acquires the metadata related to the controlling device contained in the selected controlling node.