| Patent application number | Description | Published |
|---|
| 20080291089 | Apparatus and Method for Computing Location of a Moving Beacon Using Time Difference of Arrival and Multi-Frequencies - Provided is an apparatus and method for computing the location of a radio beacon by using Time Difference Of Arrival (TDOA) and multiple frequencies. The apparatus and method of the present invention compute the location of a radio beacon without limitation in distance by using multiple frequencies and time difference of arrival to resolve the problem of phase ambiguity. A radio beacon location computing system includes a plurality of base stations configured to receive signals of multiple frequencies transmitted from the radio beacon, and detect and output phase differences and arrival time; and a location computing server configured to receive the phase differences and the arrival time outputted from the respective base stations, acquire calculation distances based on the phase differences, remove phase ambiguity from the calculation distances based on the arrival time, and compute the location of the radio beacon. | 11-27-2008 |
| 20080294585 | Real-Time Business Process Triggering System and Method Using Rfid - Provided is a real-time business process triggering system (RBPTS) using a Radio Frequency Identification (RFID) and a method thereof. The RBPTS is to provides interface to a corporation information system by generating an RFID event proper to a specific domain by giving the RFID data a business meaning to apply the RFID data to a predetermined rule before transmitting the RFID data to the corporation information system, provide a rule modeling function to flexibly managing changes in application field and environment, and provide an RFID related-action related to rule performance, and a method thereof. The RBPTS includes: an RFID middleware adapter for receiving RFID data from an RFID middleware/RFID reader and generating RFID events Extensible Markup Language (XML) document; an event manager for receiving the RFID events XML document from the RFID middleware adapter and generating an event query for inference; a rule manager for generating a result set by performing rule inference on the event query through an inference engine and generating an action list; Web Service arbitrator for communicating through Web Service using an external application and a Simple Object Access Protocol (SOAP); an action manager for performing real-time action by calling the Web Service through the Web Service arbitrator based on the action list; and an event repository for storing and managing registered all RFID event information, rule and action. The RBPTS is applied to maritime freight transportation. | 11-27-2008 |
| 20080309578 | Antenna Using Proximity-Coupling Between Radiation Patch and Short-Ended Feed Line, Rfid Tag Employing the Same, and Antenna Impedance Matching Method Thereof - Provided is an antenna based on proximity coupling between a short-ended microstrip feed line and a radiation patch, an RFID tag including the planar antenna, and an antenna impedance matching method thereof. The antenna includes a radiation patch configured to determine a resonant frequency of the antenna; a ground plate disposed in parallel to the radiation patch; and a feeding part disposed between the radiation patch and the ground plate and configured to provide radio frequency signals to a device connected to the antenna. The feeding part includes a feed line that is formed in a resonance length direction of the radiation patch and proximity-coupled with the radiation patch and one end of the feed line is shorted. The antenna freely controls the resistance and reactance of the antenna impedance independently and efficiently matched to a device connected to the antenna which has a predetermined impedance in wide bands. | 12-18-2008 |
| 20080316104 | Apparatus and Method for Computing Location of a Moving Beacon Using Received Signal Strength and Multi-Frequencies - Provided is an apparatus and method for computing the location of a radio beacon by using received signal strength (RSS) and multiple frequencies. The apparatus and method of the present invention computes the location of a radio beacon without limitation in distance by using multiple frequencies and received signal strength to resolve the problem of phase ambiguity. A radio beacon location computing system includes a plurality of base stations configured to receive signals of multiple frequencies transmitted from the radio beacon, and detect and output phase differences and received signal strength; and a location computing server configured to receive the phase differences and the received signal strength outputted from the respective base stations, acquire calculation distances based on the phase differences, remove phase ambiguity from the calculation distances based on the received signal strength, and compute the location of the radio beacon. | 12-25-2008 |
| 20080316105 | Method and Apparatus For Transmitter Locating Using a Single Receiver - Provided is a method and apparatus for locating a transmitter. The apparatus for locating a transmitter, including: an antenna having an antenna array for receiving first and second frequency signals transmitted from the transmitter and measuring an angle of the transmitter; a range of transmission (ROT) calculating unit for calculating the range of transmission of the transmitter based on phase difference between the first and second frequency signals; an angle of arrival (AoA) calculating unit for calculating the angle of the transmitter based on phase difference of common frequency signals received in the antenna; and a transmission location determining unit for determining the location of the transmitter based on the range of transmission and the angle of arrival of the transmitter. | 12-25-2008 |
| 20090006522 | INTEGRATED INTERFACE APPARATUS AND METHOD FOR HETEROGENEOUS SENSOR NETWORKS - Provided are an integrated interface apparatus and a method for heterogeneous sensor networks. The integrated interface apparatus includes an application system interface for converting a query command of an application system into a sensor network command according to a common message protocol, analyzing a response message with respect to the sensor network command, and transmits the converted command to the application system; and a sensor network interface for converting the sensor network command according to characteristics of the corresponding sensor network, transmitting the converted sensor network command to the corresponding sensor network, converting sensing data of the respective sensor networks according to predefined data format, and transmitting the converted sensing data to the application system interface over the response message with respect to the sensor network command. | 01-01-2009 |
| 20090016305 | METHOD FOR AVOIDING AND OVERCOMING INDIRECT COLLISION IN BEACON-MODE WIRELESS SENSOR NETWORK - There is provided to a method for avoiding indirect collision of beacon, including: collecting beacon information of neighboring nodes and allocating a time slot based on the collected beacon information; transmitting information on the allocated time slot to the neighboring nodes depending on time slots of the neighboring nodes; and checking whether the time slot overlaps based on a reply message from the neighboring nodes and reallocating a time slot upon occurrence of overlapping. | 01-15-2009 |
| 20090209283 | SYSTEM WITH SHARED POWER AMPLIFIER FOR MOBILE COMMUNICATION TERMINAL WITH MOBILE RFID FUNCTION - Provided is a power amplifier sharing system for a mobile communication system having a mobile Radio Frequency Identification (RFID) function, particularly, a power amplifier sharing system that can reduce the power consumption and the size of a circuit in a mobile communication terminal having a mobile RFID function. The system includes a mobile communication transceiver for transmitting/receiving a mobile communication signal; a mobile RFID transceiver for transmitting/receiving a mobile RFID signal; a power amplifier for amplifying a signal; a switch for connecting the mobile communication transceiver and the mobile RFID transceiver to the power amplifier; and a transceiver controller for controlling the switch and the power amplifier. | 08-20-2009 |
| 20090274127 | METHOD FOR DETERMINING SUPERFRAME FOR BEACON SCHEDULING - Provided is a method for determining superframe to efficiently perform beacon scheduling by allocating superframe lengths which are different according to a routing depth of sensor nodes in a ZigBee based wireless sensor network. The method for determining a superframe for beacon scheduling, includes the steps of: receiving a beacon from a neighboring node and grasping information on a superframe used by the neighboring nodes; and determining a transmission time and a length of own superframe based on superframe information of the grasped neighboring node. | 11-05-2009 |
| 20090285140 | Method for Managing Dormant Nodes in Wireless Sensor Network - Provided is a method for managing dormant nodes in a wireless sensor network. The method includes the steps of: a) acquiring and storing information on distance and location of sensor nodes registered in a corresponding cluster among at least one cluster managed by a managing node; b) selecting a dormant object node among the sensor nodes by the managing node; c) transmitting dormant information that the dormant object node should go into a dormant state for a predetermined period through a beacon message to the dormant object node and creating a dormant node management table; and d) updating a dormant time of the dormant node management table every beacon cycle by the managing node according to setup of a dormant time central managing function and notifying dormancy expiration to the corresponding dormant node. | 11-19-2009 |
| 20100008275 | NODE SYNCHRONIZATION SYSTEM FOR LOW-POWER IN SENSOR NETWORK AND METHOD THEREOF - Provided are a node synchronization system for low-power in a sensor network and a method thereof. The node synchronization system includes: a network transmitting means for transmitting information on a synchronization time difference to the sensing data collecting means and transmitting sensing data to a network; the sensing data collecting means for receiving synchronization time information from the network transmitting means, being synchronized with the network transmitting means, collecting the sensing data from a sensing means, and transmitting the sensing data to the network transmitting means; and the sensing means for receiving synchronization time information from the sensing data collecting means, being synchronized with the sensing data collecting means, sensing a sensing peripheral environment information, and transmitting the sensing data to the sensing data collecting means. | 01-14-2010 |
