Abstract:
A method and apparatus are provided for transmitting wireless power to at least one wireless power receiver. The apparatus includes a communication unit that receives power management information from the at least one wireless power receiver, wherein the power management information includes a power capacity of each of the at least one wireless power receiver; and a controller that analyzes the power management information and determines whether an output capacity of the wireless power transmitter is greater than a total sum of the power capacities of the at least one wireless power receiver.
Abstract:
An apparatus and a method for determining a gateway using lower power are provided. The method includes setting probing transmission power for setting the gateway, transmitting a probing request message to another mobile station existing in a cluster with the set probing transmission power, when a probing response message is received from the other mobile station, generating a probing response list for the mobile station having transmitted the probing response message, determining whether a cluster list for mobile stations existing in the cluster corresponds to the probing response list, and determining a gateway mobile station according to a result of the determination as to whether the cluster list for mobile stations existing in the cluster corresponds to the probing response list.
Abstract:
Disclosed is a control method of a communication system including at least one sensor that a user wears, a wireless communication apparatus and a coordinator. The control method of the communication system includes: in the coordinator, receiving a proxy authority request for proxy with respect to the at least one sensor and the coordinator from the wireless communication apparatus, and granting the proxy authority to the wireless communication apparatus; in the wireless communication apparatus, creating a user identifier corresponding to the user; in the wireless communication apparatus, searching for the at least one sensor that the user wears, and forming a pairing with the at least one found sensor; in the wireless communication apparatus, making a request to the at least one found sensor for association information for the association with the coordinator and the sensor, and receiving the association information; in the wireless communication apparatus, making a request to the coordinator for association proxy for an association between the at least one found sensor and the coordinator, and receiving the association proxy in response to the request; and in the coordinator, requesting data by forming an association with the at least one found sensor, and receiving data corresponding to the data request.
Abstract:
A method and apparatus for supporting mobility of a mobile terminal in a Visible Light Communication (VLC) system. The method includes activating only necessary light sources for VLC considering the mobility of the mobile terminal, instead of using total light sources for VLC. Consequently, power consumption can be significantly reduced.
Abstract:
A wireless charging apparatus and method are provided. The method includes transmitting a power supplying device search signal by a wireless power receiving device; recognizing a plurality of power supplying devices by receiving power supplying device search response signals; sending a power supply request to a first power supplying device among the plurality of power supplying devices; sending a power supply request to a second power supplying device upon receiving a charging rejection signal from the first power supplying device; and performing wireless charging by receiving power from the second power supplying device upon receiving a charging permission signal from the second power supplying device.
Abstract:
An apparatus and a method for wireless charging are disclosed. The method includes transmitting a wireless power supply apparatus search signal, receiving a wireless power supply apparatus search response signal and recognizing multiple apparatuses for wirelessly supplying power, sending a request for wirelessly supplying power to a first apparatus, sending a request for cooperative charging to a second apparatus, and receiving first and second power from the first and the second apparatuses, respectively, and performing wireless charging according to reception of a cooperative charging permission signal from the second apparatus for wirelessly supplying power.
Abstract:
Disclosed are: a communication technique for merging, with the Internet of Things (IoT) technology, a 5th-generation (5G) communication system for supporting a data transmission rate higher than that of a 4th-generation (4G) system; and a system therefor. The disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retailing, security and safety related services) on the basis of 5G communication technology and IoT related technology. One embodiment of the present invention enables a terminal to receive at least one reference signal from a base station in a mobile communication system, and to generate channel state information on the basis of the at least one reference signal so as to transmit the channel state information to the base station, wherein the at least one reference signal is received in a downlink pilot time slot (DwPTS) by using a resource determined on the basis of a special subframe configuration.
Abstract:
The present disclosure relates to a 5G or pre-5G communication system to be provided for supporting a higher data transfer rate beyond a 4G communication system such as LTE. According to the present disclosure, there is provided a method for supporting repetitive transmission of uplink data by a base station in a mobile communication system operating in a time division duplex (TDD) based cell including at least one subframe for uplink transmission and at least one subframe for downlink transmission comprising repeatedly transmitting uplink data scheduling information in a downlink subframe where an uplink hybrid automatic repeat request (HARQ) process is defined and repeatedly receiving uplink data in uplink subframes which start from an uplink subframe according to an HARQ transmission timing of an HARQ process defined in a downlink subframe where the repetitive transmitting of the uplink data scheduling information is complete.
Abstract:
A method and apparatus for providing additional information to a visible light communication terminal through visible light communication by an information display device having a back light unit is provided. The method includes, when the visible light communication terminal is located in one area corresponding to at least one additional information providing area that is disposed within a screen of the information display device, receiving time slot information allocated to the one area through the visible light communication, when the visible light communication terminal is located in remaining areas of the at least one area corresponding to the at least one object, except for the one area, receiving additional information on all objects from the remaining areas through the visible light communication, and acquiring additional information on the object corresponding to the one area from among the additional information on all the objects by using the allocated time slot information.
Abstract:
According to one embodiment, a photo detector-combined illuminance sensor includes a circuit for a Photo Detector (PD) function to detect the illuminance of the ambient environment. The illuminance sensor operates under the control of a controller in a visible light communication terminal. When an optical signal detected by the illuminance sensor is a visible light communication signal, the controller switches to cause the illuminance sensor to operate as the photo detector for the visible light communication in a visible light communication mode.