Patent application number | Description | Published |
20090109866 | Method for Balancing Quality of Wireless Communication Channel and Wireless Communication Apparatus Using the Same - Disclosed herein are a method for balancing the quality of a wireless communication channel wherein the quality of the wireless communication channel can be more accurately estimated and adjusted on the basis of the combination of observation results of the number of data frames failed to be transmitted in the past and a received signal strength (RSS), and reliability of data transmission over the channel can thus be increased, and a wireless communication apparatus using the same. The method includes collecting information about whether data frames have been successfully transmitted and information about RSSs of the wireless communication channel, acquiring the number of data frames failed to be transmitted and an average RSS in a predetermined observation period using the collected information, comparing the acquired transmission-failed data frame number with a predetermined threshold value and the acquired average RSS with a predetermined reference RSS, respectively, and estimating the quality of the wireless communication channel and quality degradation factors in detail by performing an AND operation with respect to the comparison results. Therefore, it is possible to stably adjust the channel quality. | 04-30-2009 |
20090157877 | Sensing Information Management Apparatus and Method of Sensor Based Home Network System - An apparatus of managing sensing information for a sensor based home network and a method thereof are disclosed. The apparatus includes a sensor network to collect sensing information from multifunctional sensor nodes, a sensing information processing and managing unit for deciding the optimized context information through controlling and managing the collected sensing information according to all of the context information and providing services suitable to user's intention and environment. Therefore, the apparatus prevents collision and minimizes the interference generated between sensing information. | 06-18-2009 |
20090261978 | Apparatus and Method of Ubiquitous Context-Aware Agent Based On Sensor Networks - An apparatus and method for context awareness by detecting intentions of a user in the ubiquitous environment using context information which is created by analyzing real world data collected from sensors are provided. The apparatus is configured of a sensor platform, a context-aware agent and a service provider. The sensor platform collects data of real world and transmits the collected data to the context-aware agent. The context-aware agent integrates the data of real world from the sensor platform, and stores and manages context information according to the integrated data. The service provider automatically controls objects to perform necessary operations to provide a predetermined intelligent services according to the context information received from the context-aware agent. | 10-22-2009 |
20090285189 | Wlan Combo Access Point Device for Interface With WiMedia UWB Based Wireless USB and Software Layer Structure of Combo Access Point Device - Provided is a combo access point (AP) device integrated with an WiMedia ultra wideband (UWB) based wireless universal serial bus (WUSB) and a wireless local area network (WLAN) AP. A combo AP device includes a wireless local area network (WLAN) AP block providing wire and wireless telecommunications interfaces, and a wireless universal serial bus (WUSB) block configured in one integral structure with the WLAN AP block and providing a ultra wideband (UWB) based wireless interface with WUSB devices using a WiMedia UWB interface mode. Configuring the combo AP device by matching the functions of the WLAN AP with the WiMedia UWB based WUSB interface can provide dual functions of the WUSB and the WLAN AP and allows personal computer users to easily access commonly shared WUSB devices. | 11-19-2009 |
20110007650 | METHOD OF ESTIMATING POSITION OF MOBILE NODE IN WIRELESS SENSOR NETWORK - The present invention relates to a method of estimating the position of a mobile node in a wireless sensor network using a passive mode OWR method. The method includes: estimating frequency offsets of anchor nodes and a mobile node; allowing the anchor nodes to sequentially transmit ranging frames; allowing the mobile node to receive the ranging frames and to estimate the difference between the reception times of signals from two anchor nodes; and applying the estimated difference between the reception times of the signals to time difference of arrival (TDOA) to estimate the position of the mobile node. According to the above-mentioned structure of the present invention, a plurality of mobile nodes can estimate their positions with a minimum number of ranging frame transmissions, without using a separate network synchronization unit. In addition, it is possible to easily construct a wireless sensor network for position recognition, and rapidly and accurately perform distance estimate using an OWR method. | 01-13-2011 |
20120130519 | SYSTEM AND METHOD FOR COMMUNICATING ZIGBEE-BASED AUDIO DATA - An apparatus for transmitting Zigbee-based audio data includes a first communication unit to communicate an audio data generation apparatus; a second communication unit to communicate an audio data reception apparatus; a first buffer group comprising a plurality of buffers to store audio data; and a control unit to, when receiving an audio input command through the first communication unit, control the second communication unit to transmit a data transmission notification signal to the audio data reception apparatus, store audio data received through the first communication unit sequentially in the plurality of buffers, packetize the audio data stored in at least one buffer of the plurality of buffers, and control the second communication unit to transmit the packetized audio data to the audio data reception apparatus. | 05-24-2012 |
20130061270 | MEDIA SHARING APPARATUS AND METHOD - The media sharing apparatus includes a terminal information management unit for, when a media playing terminal is connected thereto, requesting profile information from the connected media playing terminal and managing profile information received from the media playing terminal. A media information management unit determines based on the profile information whether to convert media data to be provided to the media playing terminal, and ascertains media conversion information suitable for a type of the media playing terminal. A media conversion unit converts the media data into data suitable for the type of the media playing terminal depending on a result of the determination. A data processing unit provides either media data suitable for the type of the media playing terminal among pieces of pre-stored media data, or media data converted by the media conversion unit, to the media playing terminal. | 03-07-2013 |
20140288866 | METHOD AND APPARATUS FOR MANAGING SENSOR DATA - Provided is a method and apparatus for managing sensor data by determining an appropriate sensor data collection cycle for each service in view of a weighting such as an amount of energy saved by data collection cycles, a data storage space and data processing time, and a probability of an error happening, and collecting and manage sensor data based on the sensor data collection cycle. The apparatus for managing the sensor data includes a profile management unit to manage a sensor profile defining each senor, a sensor system and a characteristic of a service, a service management unit to manage a preinstalled service and to collect and recommend a service based on the sensor profile from the sensor system, and a data collection cycle determination unit to determine a necessary sensor data collection cycle for the service. Furthermore, the apparatus includes a sensor data management unit to collect sensor data based on the sensor data collection cycle and to manage the sensor data, and an interface to connect the sensor system and an external device. | 09-25-2014 |