Patent application number | Description | Published |
20100227557 | WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR MANAGING AN UNDERGROUND FACILITY - A wireless communication system for managing an underground facility includes: at least one sensor node attached to the underground facility configured to transmit a sensing signal via magnetic field communication after detecting the status information of the underground facility in accordance with a driving signal, the driving signal comprising a wake-up signal; and an information collection device configured to: transmit the driving signal to the sensor node; collect the sensing signal transmitted from the sensor node; and transmit the collected information to a monitoring system via short-range wireless communication. | 09-09-2010 |
20110243044 | MAGNETIC FIELD COMMUNICATION METHOD AND APPARATUS CAPABLE OF RECOGNIZING MULTIPLE NODES - Magnetic field communication methods and apparatuses are performed by the coordinator and node of a magnetic field area network, respectively. The method which is performed by the coordinator includes: (a) sending a request packet requesting association with a network, disassociation from a network, network association state checking, data transmission, or group address setting, (b) receiving response packets, (c) selecting one or more response packets from among the received response packets, (d) sending a response acknowledgement packet to nodes corresponding to the selected response packets, (e) receiving response packets resent by nodes which have not received the sent response acknowledgement packet, (f) selecting one or more response packets from among the response packets received at (e), and (g) sending a response acknowledgement packet to nodes corresponding to the response packets selected at (f). | 10-06-2011 |
20110243267 | MAGNETIC FIELD COMMUNICATION METHOD FOR MANAGING NODE WITH LOW POWER CONSUMPTION - A magnetic field communication method is provided for managing node with low power consumption which enhances performance and efficiency of a magnetic field area network in the low frequency region. The magnetic field communication method for managing node with low power consumption of the present invention is accomplished in a low-frequency wireless network that is comprised of a MFAN-C and at least one MFAN-N wherein a physical layer is comprised of a preamble, a header, and a payload, and the preamble is comprised of a wake-up sequence and a synchronization sequence. The wake-up sequence is only added to the preamble of the frame that is transmitted from the MFAN-C when the MFAN-N is being activated from the hibernation mode. The wake-up sequence is modulated using ASK modulation, and the synchronization sequence is modulated using BPSK modulation. | 10-06-2011 |
20120169293 | Charging method of multi-node wireless charging system using magnetic field communication - Disclosed is a charging method of a multi-node wireless charging system using magnetic field communication capable of effectively charging a plurality of nodes using the magnetic field communication. The magnetic field communication protocol for wireless charging is prepared and thus, an appropriate wireless charging device may be selected and charged for an appropriate time. The wireless charging method of the present invention includes: transmitting an association request frame; receiving an association response frame from the wireless charging devices; transmitting a charging requirement request frame; receiving a charging requirement response frame from the wireless charging devices; transmitting a charging preparation request frame; and transmitting power during a receiving period of the charging preparation response frame for the charging preparation request frame. | 07-05-2012 |
20130278206 | METHOD AND SYSTEM FOR MULTI WIRELESS CHARGING - A wireless multi charging method and system are disclosed. The wireless charging method selects a portion of mobile devices located in a charging region as a group, and provides energy for wireless charging to the selected group of mobile devices. Accordingly, group charging is possible, and thus it is also possible to selectively charge mobile devices which allow charging. | 10-24-2013 |
20140312833 | METHOD FOR TRANSFERRING WIRELESS POWER - This invention defines management protocols for wireless power transfer to multiple devices in Multi-device Wireless Power Management System. Various functions of Multi-device Wireless Power Management System are justified from this invention. The WPT frames and messages which work between the management block of a charger and the management block or the coupler block of a device, or the coupler block of a charger are defined as well to execute various functions. Also the procedures for each functionality are described based on its frames and messages. | 10-23-2014 |
20140312852 | THE METHOD FOR TRANSFERRING WIRELESS POWER - This invention defines management protocols for wireless power transfer to multiple devices in Multi-device Wireless Power Management System. Various functions of Multi-device Wireless Power Management System are justified from this invention. The WPT frames and messages which work between the management block of a charger and the management block or the coupler block of a device, or the coupler block of a charger are defined as well to execute various functions. Also the procedures for each functionality are described based on its frames and messages. | 10-23-2014 |
20150194838 | METHOD FOR WIRELESSLY CHARGING MULTI-NODE WIRELESS POWER TRANSMITTING SYSTEM - The present invention relates to a method for wirelessly charging a multi-node wireless power transmitting system which can efficiently perform charging using wireless communication. According to the method, a wireless power supply apparatus detects a change in a power transmission environment on the basis of a current/voltage change to accordingly perform rematching or reschedule, and combines and uses a power transmission method through time division for the simultaneous charging of a plurality of devices and a simultaneous power transmission method through multi-matching. | 07-09-2015 |