Abstract:
PURPOSE: Obstacle density based route schedule method and apparatus are provided to perform an intelligent route schedule and a route schedule based on the knowledge information of a dynamic obstacle and a static obstacle. CONSTITUTION: An obstacle density based route schedule apparatus(100) comprises an obstacle density calculator(110), a clustering unit(120), and a route schedule output unit(130). The obstacle density calculator calculates the obstacle density on each cell by classifying an image on a cell basis. The clustering unit groups each cell to one or more groups. The route schedule output unit outputs the routing schedule by performing a gene algorithm using the obstacle density of each cell and the information on one or more groups. The obstacle density calculator calculates the obstacle density by calculating the occupying ratio of black and white for the fixed obstacle and the brightness value of a pixel for the dynamic obstacle, on a pixel basis for each cell.
Abstract:
PURPOSE: A method for supplying a multimedia service, an apparatus and a recording medium thereof for rapidly searching a desired part of the service are provided to generate new multimedia data by extracting the desired part from the multimedia data. CONSTITUTION: A data extracting unit(110) extracts data of one or more segments from one or more multimedia data. A first data processor(120) generates a first multimedia data by combining the extracted data through a preset compressing CODEC(Coder Decoder). A second data processor(130) inserts option data to first multimedia data and generates second multimedia data based on the multimedia service information.
Abstract:
무선 센서 네트워크에서 비콘 구간 크기 조절을 통한 네트워크 성능 개선 방법 및 장치를 개시한다. 본 발명에 의한 무선 센서 네트워크에서 비콘 구간 크기 조절을 통한 네트워크 성능 개선 방법은, 무선 센서 네트워크의 최대 홉 크기를 고려하여, 슈퍼 프레임의 비콘 구간 크기를 조절하는 단계; 및 상기 조절된 크기의 비콘 구간을 상기 슈퍼 프레임에 적용하여 전송하는 단계를 포함한다. 네트워크, 센서 네트워크, 비콘 구간, 홉, 슈퍼 프레임
Abstract:
PURPOSE: A mobile terminal based control system and method for a mobile robot are provided to implement various additional services by controlling the mobile robot docked with a mobile terminal through a serial communication. CONSTITUTION: A mobile terminal based control system for a mobile robot comprises a connection checking unit(201) of a mobile terminal, a control unit(203) of the mobile terminal, a serial interface(205) of a mobile robot, and a control unit(206) of the mobile robot. The connection checking unit of the mobile terminal detects whether the mobile robot is connected to a serial port(202). The control unit of the mobile terminal creates first control information based on the output of a terminal sensor module(204) when the mobile robot is connected to the serial port. The serial interface of the mobile robot receives the first control information through serial communication with the serial port. The control unit of the mobile robot controls the mobile robot according to the first control information.
Abstract:
PURPOSE: A method and a system for cooperating a multi-robot are provided to select an optimum robot for working based on device information. CONSTITUTION: A system(100) for cooperating a multi-robot comprises a software resource management module(110), a hardware resource management module(120), and a robot task control module(130). The software resource management module collects program information from each robot. The hardware resource management module collects information of a mounted device from each robot. The robot task control module selects a robot for working based on the program information, and assigns a task to the selected robot.
Abstract:
사용자가 화재 또는 대기 오염의 발생에 대해 신속하게 대처할 수 있도록, 센서 네트워크로부터 입력된 스트림 센서 데이터에 대한 데이터 처리를 통해, 대상 공간에 대한 현재 시점의 상태 등급을 결정하고, 이에 기초하여, 미래 시점의 상태 등급을 예측할 수 있는 센서 데이터 처리 방법 및 시스템을 개시한다. 본 발명에 따르는 센서 데이터 처리 방법은, 센서 네트워크로부터 입력되는 스트림 센서 데이터를 세그먼테이션(segmentation)하여 센서 데이터를 식별하는 단계와, 상기 식별된 센서 데이터에 기초하여 상기 센서 네트워크가 위치하는 대상 공간에 대한 상태 등급을 결정하는 단계, 현재 시점과 상기 결정된 상태 등급을 대응시켜 상기 대상 공간별 저장 공간에 저장하는 단계, 및 상기 대상 공간별 저장 공간을 참조하여 상기 현재 시점 이후의 미래 시점에서 상기 대상 공간에 대한 상태 등급을 예측하는 단계를 포함하는 것을 특징으로 한다. 센서 네트워크, 스트림 센서 데이터, 센서 식별자, 감지 종류, 상태 등급
Abstract:
공유 비콘 구간을 이용한 QoS 제공 방법을 제공한다. 공유 비콘 구간을 이용한 QoS 제공 방법은 공유 비콘 구간(BOP; Beacon Only Period)에 단말 디바이스인 제1 노드가 비콘 프레임에 QoS(Quality of Service)에 대한 정보를 포함시켜 상위 노드로 전송하는 단계와, 상위 노드가 코디네이터 노드이면, 코디네이터 노드가 제1 노드의 비콘 프레임의 페이로드에서 QoS에 대한 정보를 판독하고, 제1 노드에 발생한 이벤트에 대한 상태 정보를 판독하여 이벤트에 따른 소정 동작을 수행하는 단계를 포함한다. 비콘 프레임, AODV(Ad hoc On-Demand Distance Vector), QoS(Quality of Service)
Abstract:
A method and an apparatus for improving network performance by adjusting a bop size in a wireless sensor network are provided to minimize packet delay by re-using a beacon period based on the adjustment of the size of a BOP(Beacon-only Period). A ZigBee coordinator compares a value that a maximum hop count of a wireless network is divided into selected numbers with a length of BOP(Beacon-only Period)(S310). The ZigBee coordinator adjusts the size of the beacon period(S320), and applies the adjusted beacon period to the super frame and transmits the applied super frame(S330,S350).
Abstract:
An upsteam and downstream dynamic routing method using a beacon is provided to supply efficient dynamic routing by using beacon and join information of a MAC(Media Access Control) layer without using a route search packet. A node receives an address value from its parents node and shares address information with the parents node so that the node is joined with the parents node. The node determines whether a received data packet is broadcast(S201). When the data packet is not a packet to be broadcast, the node determines whether the node is a final destination node(S203). If the node is not a final destination node, the node transmits the data packet to the parents node based on the shared address information to set a routing route(S204).
Abstract:
A DACW(Distance. Adaptive Contention Window) adjusting apparatus in a wireless sensor network and a method thereof are provided to obtain more transmission opportunities in a node where the traffic bottleneck phenomenon occurs, thereby reducing the channel competition time and the amount of consumed energy. A DACW adjusting apparatus floods concerned packets so that a sink node can receive desired data from sensor target nodes(S10), calculates the hop count to relay the packets to a neighboring node(S20), establishes a path to the sink node by using routing metric(S30), compares the current traffic node with a pre-defined critical value based on the established path to determine whether the current state is congested(S40), if it is determined that the congestion does not occur, largely adjusting the value of a contention window(S50), and then if it is determined that the congestion occurs, adjusting the contention window value in small(S60).