Abstract:
부트스트랩 신호 복호화 장치 및 방법이 개시된다. 본 발명의 일실시예에 따른 부트스트랩 신호 복호화 장치는 수신한 부트스트랩 신호의 상대적 순환 이동 값과 채널 이득 추정 값을 산출하고, 상기 상대적 순환 이동 값을 이용하여 상기 채널 이득 추정 값을 보상하는 연산부 및 보상된 채널 이득 추정 값을 이용하여 상기 부트스트랩 신호를 복호화하는 복호화부를 포함한다.
Abstract:
PURPOSE: An address allocation method and a routing method in low power consumption wireless communication network are provided to increase effectiveness of the address allocation by making use of the unused address possible. CONSTITUTION: An address is allocated according to DAAM(S100). In case the additional address allocation is impossible according to DAAM, if the additional address allocation request is inputted from a new node, the additional address is allocated according to RAAM(S130). The node to which the addition address is allocated receives the address allocation request from the other new node(S140). According to the additional address request, the other new node is allocated by RAAM.
Abstract:
저전력 무선 통신 망에서의 주소 할당 방법에 관한 것으로, 분산 주소 할당 기법(DAAM)에 따라 주소를 할당하고, 분산 주소 할당 기법에 따라 추가 주소 할당이 불가능한 경우에 신규 노드로부터 추가 주소 할당 요청이 입력되면, 무작위 주소 할당 방식에 따라 추가 주소를 할당하는 주소 할당 방법에 의해 주소 할당의 효율성을 증대시킬 수 있다. 지그비, 주소할당, DAAM, 스토케스틱
Abstract:
A domain name apparatus and a method thereof in IP-based wireless sensor network using a new domain naming system are provided to obtain sensor information of a region desired through an internet by using a domain name indicating the kind of a sensor and a geographic location. A sensor node information receiver(110) receives the sensor node information. The sensor node information comprises the location information of a sensor node, the kind of sensing data and IP(Internet Protocol) of the sensor node. A specific local information searching unit(120) searches specific geographical information including an administrative area address corresponding to the location information. A domain name generator(130) produces the domain name of the sensor node and specific geographical information of sensing data. A domain name register(140) binds IP of the sensor node and registers the IP in a domain name server.
Abstract:
본 발명은 근거리 무선 네트워크에 관한 것으로, 특히 지그비(ZigBee) 네트워크에서의 주소 할당 방법 및 라우팅 방법에 관한 것으로, 상기 방법은 신규 노드의 접속 요청시 자식 노드에게 할당 가능한 여유 주소가 존재하는가를 체크하는 단계와; 할당 가능한 여유 주소가 없을 경우 주변 노드에게 주소차용 요청메시지를 전파하는 단계와; 수신된 주소차용 응답메시지에 포함된 어느 하나의 주소를 신규 노드의 주소로 할당하여 접속응답 전파하는 단계;를 포함함으로써, 노드들이 지형적 분산과 맞지 않더라도 낭비되는 여분의 주소를 최소화하고 개별 노드 주소의 유일성을 보장할 수 있도록 주소를 할당할 수 있는 효과가 있다. 지그비, 라우팅, 주소할당.
Abstract:
PURPOSE: A system and a method for providing 3d image data in a 3d image system are provided to convert a depth image into a parallax map to transmit image data by a new transmission method, thereby increasing coding efficiency in transmission and reducing a calculation amount with a memory used in a receiver. CONSTITUTION: The first filtering unit(120) quantizes depth image data using a histogram included in image data received from image photographing devices. The second filtering unit(140) measures discontinuity in the quantized depth image data. The second filtering unit performs smoothing and filtering based on an inclined direction using the discontinuity. An encoding unit(180) encodes reference image data including a generated parallax map and the image data.
Abstract:
A routing device and a method thereof using an adjacent node in wireless sensor network are provided to improve a throughput by each node by determining next sensor node transmitting data according to a target node. An adjacent node decision unit(610) determines adjacent node among nodes. A transmit unit(650) directly transmits data to the adjacent node connected to the destination node. A hop number comparator(640) compares a hop count required for a hierarchical routing mode and a hop count required for the hierarchical routing mode after the direct transmission.
Abstract:
PURPOSE: A channel selection method and communication method are provided to convert a communication channel by sensing wireless interference from a Zigbee sensor network. CONSTITUTION: An interference sensing process is repeated(205). When interference is sensed, a channel hopping method is executed by considering a Wi-Fi channel in a current channel. It is determined whether a channel is available(211). When the available channel is not searched, a hopping sequence interval is controlled(215). It is searched whether the channel is available. When the available channel is searched, the available channel is used for communication. [Reference numerals] (205) Interference sensed?; (AA,CC,EE,KK,HH,II,OO,PP) No; (BB,DD,FF,GG,LL,JJ,MM,NN) Yes