Abstract:
무선 애드 혹 네트워크에서 분산형 스케줄링 방법에 관한 것으로, 무선 망 내의 노드들을 여러개의 클러스터로 나눈 후 각 클러스터의 클러스터 헤드를 결정하고, 스케줄링 순서에 따라 클러스터 별 스케줄링을 수행함으로써, 변화에 빠르게 적응할 수 있고, 저전력을 소비하는 효율적인 클러스터 기반의 스케줄링 방법을 제공한다. 애드 혹, 스케줄링, 자원할당, 동기화
Abstract:
PURPOSE: An adaptive interfere avoiding apparatus and method in a channel hopping-based wireless ad-hoc network are provided to classify an unavailable channel on the basis of the measurement of node channel quality. CONSTITUTION: A channel quality measurement unit(110) measures channel quality with a received frame. A channel information storage unit(120) stores the measured channel quality information. Based on the channel quality information, an unavailable channel classification unit(130) classifies an unavailable channel through which communication is not performed later. An unavailable channel propagation unit(140) transfers a unavailable channel list to a neighbor node. A transceiver(150) transmits and receives a frame through a channel which is not classified as the unavailable channel.
Abstract:
PURPOSE: A mixing virtual multiplexing transmitting method in a wireless ad-hoc network system is provided to use an optimized transfer method to delay time by dividing a data transferring path in wireless ad-hoc network. CONSTITUTION: An SISO(Single Input Single Output) base SP(Shortest Path) is set up(211). The length of a section is set up in an asynchronous transmission method(212,213). The MN collects node information in centralized and mixed routing. A transmission method is selected in order to minimize energy consumption and delay time(231,232).
Abstract:
PURPOSE: A data communication method using a body area network super frame is provided to ensure the data transfer of various qualities by sharing limited link resources. CONSTITUTION: A coordinator node broadcasts predetermined information during an advertisement section(a). Only when competitive media access section is initialized and data do not exist in a transmission slot after preset backoff time, a node transmits data through carrier sensing(b-d). Each node broadcasts a beacon signal periodically during a beacon section, and transmits continuous and periodic data during data transmission section(e).
Abstract:
PURPOSE: By enlarging the logical channel number without the expansion of the physical channel the radio network system using the cyclic frame supports the expandability of network. CONSTITUTION: A cyclic frame comprises a beacon section(310), and a slotted section(320) and a mesh product words and phrases liver(330). In the beacon section is the radio network system, the beacon transmission is proceed between nodes. The slotted section is implementing data transmission between nodes. The use of the slotted section and beacon section is scheduled for mesh product words and phrases.
Abstract:
본 발명에 의한 무선 센서 네트워크에서 클러스터링 기반의 위치 인식 방법은 클러스터 헤드간 상호 위치를 인식하는 단계; 센서 노드가 자신을 관할할 클러스트 헤드를 선택하는 단계; 및 상기 클러스터 헤드가 상기 센서 노드의 위치 정보를 획득하는 단계;를 포함하는 것을 특징으로 하며, 1, 2차 위치 인식 과정을 통하여 위치 인식을 위한 최소한의 통신 오버헤드만을 사용하는 구조가 가능하며, 특히 2차 위치 인식 과정은 응용 시나리오에 따라 필요시에만 해당 말단 센서 노드의 위치 추론엔진을 실행하므로 위치 인식에 필요한 네트워크 전체의 소비 전력을 최소화할 수 있다. 무선 센서 네트워크, 클러스터, 위치 인식
Abstract:
PURPOSE: A resource allocation method for a node within an AD hoc network and a device thereof for reducing calculation amount are provided to simply allocate the resource such as time slot by preventing the collision between a cluster head and a node. CONSTITUTION: A resource allocation method for a node within an AD hoc network and a device thereof for reducing calculation amount are as follows. A basic frame structure is stored(S210). A time slot is determined based on a path sequence number about the location of the node in a routing path(S220). A frame structure including a time slot is determined as a communication frame structure for communication of the node(S230). The basic frame structure includes time slots of the specific number.
Abstract:
A method for recognizing a location based on clustering in a wireless sensor network is provided to minimize a total throughput load and power consumption between the wireless sensor network and a sensor node. Location recognition information between cluster heads is presumed(S201). The cluster heads broadcast a control signal like a beacon signal(S203). A sensor node selects a cluster head managing the sensor node(S205). It is determined whether a location of the sensor node should be recognized or routing should be performed(S207). The cluster head obtains location information of the sensor node(S209).
Abstract:
An MAC and resource allocation method in a wireless ad-hoc network and a recording medium having a frame structure for the method are provided to group FFD(Full Function Device) nodes spaced from a reference node as much as one hop into a one-hop distance group and allocate resources to a high level link area for communication between the FFD nodes and a low level link area for communication between RFD(Reduced Function Device) nodes, thereby improving the reliability and QOS(Quality Of Service) of the wireless ad-hoc network. A recording medium having a frame structure for MAC(Media Access Control) and resource allocation in a wireless ad-hoc network includes an initialization field(401~404) and at least one slot(405). The initialization field is formed to initialize communication between nodes configuring the wireless ad-hoc network. The at least one slot includes a high level link area for communication between FFD nodes within a single hop distance, and a low level link area for communication between RFD nodes in the single hop distance from the FFD nodes.