Abstract:
본 발명은 저전력 무선 개인 영역 네트워크(Low power Wireless Personal Area Networks: LoWPAN)상에서 계층적 라우팅을 위한 모바일 노드의 주소 할당 방법 및 패킷 전송 방법에 관한 것이다. 본 발명은 (a) 적어도 복수개의 고정 노드를 계층적으로 구분하는 단계, (b) 상기 고정 노드들 중에서 관리 노드를 설정하고, 상기 관리 노드보다 하위 레벨의 담당 노드를 설정하는 단계, (c) 상기 모바일 노드가 상기 담당 노드와 통신이 가능한지 여부를 판별하는 단계, 및 (d) 상기 모바일 노드와 상기 담당 노드가 통신이 불가능한 경우에는 통신이 가능한 이웃 담당 노드를 통해 주소를 할당받는 단계를 포함한다. 따라서, 모바일 노드가 한 지역에 밀집되어 있는 경우에도 주소 공간의 고갈 없이 주소를 부여 가능하며 모바일 노드의 위치가 이동하더라도 계층적 라우팅을 통해 패킷의 전송이 가능하다.
Abstract:
무선 센서 네트워크에서의 라우팅 경로 설정 방법 및 이를 수행하기 위한 장치가 개시된다. 무선 센서 네트워크에서의 라우팅 경로 설정 장치는, 목적지 노드, 출발지 노드 및 다음 홉 노드를 포함한다. 출발지 노드는 패킷을 전송하는 라우팅이 시작됨에 따라, 제1 이웃 노드들을 검색하고, 제1 이웃 노드들에 목적지 노드가 포함되지 않는 경우, 제1 이웃 노드들중 목적지 노드에 가장 가까운 노드에 패킷을 전송한다. 다음 홉 노드는 출발지 노드로부터 패킷이 수신됨에 따라, 제2 이웃 노드들을 검색하고, 제2 이웃 노드들중 목적지 노드 또는 목적지 노드에 가장 가까운 노드에 패킷을 전송한다. 이에 따라, 무선 센서 네트워크 상에서 이웃 노드 정보를 이용하여 계층적으로 라우팅하고, 패킷이 전송되는 목적지에 가까운 노드를 검색하여 패킷을 전송하므로써, 패킷 전송에 따른 홉 카운트 수를 줄일 수 있다.
Abstract:
PURPOSE: A ubiquitous sensor network system and a method of configuring the same are provided to reconfigure a ubiquitous network system using a server information list and a sensor node information list included in sensor network configuration information. CONSTITUTION: Sensor network configuration information including a sensor network ID is inputted from a removable memory device according to control of a router(S210). The sensor network configuration information is inputted from the removable memory device according to control of a sensor node(S220). A sensor network is configured based on the sensor network ID according to control of the router and the sensor node(S230).
Abstract:
PURPOSE: A method for assigning a family-based address in a wireless sensor network, and a method for setting a hierarchical routing path using the same are provided to assign an address of a child node to which a parent address is reflected by enabling the parent node to respond to an address assigning request of a child node, thereby easily setting a routing path. CONSTITUTION: If address assignment is requested from a node, the number of maximum child nodes is compared with the number of current child nodes(S105,S110). If the number of current child nodes is the same as the number of maximum child nodes, address assignment is rejected(S115,S120). If the number of current child nodes is smaller than the number of maximum child nodes, addresses of childe nodes are assigned.
Abstract:
PURPOSE: An address assigning method for hierarchical routing in a low power wireless personal area network and a packet transmitting method are provided to transmit a packet using hierarchical routing even though a location of a mobile node moves. CONSTITUTION: If a node is a mobile node, the node inputs its address to a departure address field and a destination address field(S10,S20). If the node is a fixed node, the node determines whether a destination node is a mobile node(S40). If the destination node is a mobile node, the node searches whether the node has an address bundle of the destination node and its undertaking node(S50).
Abstract:
A routing metric method for AODV(Ad hoc On demand Distance Vector) routing over a wireless network is provided to prevent usage of a path whose packet loss rate is estimated to get lower by removing paths with links having LQI(Link Quality Indicator) under a reference which can have bad influence on packet delivery. A routing metric method for AODV(Ad hoc On demand Distance Vector) routing over a wireless network comprises the following several steps. A transmission node broadcasts an RREQ(Routing Request) packet to neighboring nodes in order to find a destination node for transmitting data, and the neighboring node receives the RREQ packet(S20). The neighboring node checks whether the node itself is a destination node(S21). If so in the step S21, the neighboring node checks whether the hop count of the path along which the RREQ packet has passed is longer than a twice of the hop count of an existing selected path(S22). If so in the step S22, the neighboring node compares a hop count of the existing selected path with that of a newly arrived RREQ path(S27). If the hop count of the newly arrived RREQ path is shorter than that of the existing selected path, the neighboring node transmits a response message to the RREQ(S30), and otherwise wastes the RREQ(S31). If not so in the S22, the neighboring node checks whether the number of LQI links under a reference in the new RREQ path is equal to that in the existing RREQ path(S28). If so in the step S28, the neighboring node compares the hop count of the existing selected path with that of the newly arrived RREQ path(S27). If not so in the step S28, the neighboring node compares the number of LQI links under a reference in the RREQ path with that in the existing selected path(S29). If the number of the LQI links under a reference in the RREQ path is more than that in the existing selected path, the neighboring node wastes the RREQ(S31), and otherwise transmits a response message to the RREQ(S30).
Abstract translation:提供了一种通过无线网络进行AODV(Ad hoc On Demand Distance Vector)路由的路由度量方法,以防止通过删除具有LQI(链路质量指示符)下的链路的路径来估计丢包率降低的路径的使用 可能对包传送有不良影响的参考。 通过无线网络的AODV(Ad hoc On Demand Distance Vector)路由的路由度量方法包括以下几个步骤。 传输节点向相邻节点广播RREQ(路由请求)分组,以便找到用于发送数据的目的地节点,并且相邻节点接收RREQ分组(S20)。 相邻节点检查节点本身是否是目的地节点(S21)。 如果在步骤S21中,则相邻节点检查RREQ分组已经通过的路径的跳数是否比现有选择路径的跳数的两倍长(S22)。 如果在步骤S22中,则相邻节点将现有选择路径的跳数与新到达的RREQ路径的跳数进行比较(S27)。 如果新到达的RREQ路径的跳数比现有选路径的跳数少,则相邻节点向RREQ发送响应消息(S30),否则浪费RREQ(S31)。 如果在S22中不是这样,则相邻节点检查新RREQ路径中的引用下的LQI链路的数量是否等于现有RREQ路径中的LQI链路的数量(S28)。 如果在步骤S28中,相邻节点将现有选择的路径的跳数与新到达的RREQ路径的跳数进行比较(S27)。 如果在步骤S28中不是这样,则相邻节点将RREQ路径中的参考下的LQI链路的数量与现有选择的路径中的LQI链路的数量进行比较(S29)。 如果在RREQ路径中的参考下的LQI链路的数量大于现有选择路径中的LQI链路的数量,则相邻节点浪费RREQ(S31),否则将响应消息发送到RREQ(S30)。
Abstract:
PURPOSE: A method for setting a routing path in a wireless sensor network and an apparatus for performing the same are provided to search a node close to a destination to which a packet is transmitted to transmit a packet, thereby reducing a hop count number according to packet transmission. CONSTITUTION: A logic processor(100) comprises a sensor device and a memory. A hardware processor comprises an adjacent node information management module. The adjacent node information management module uses an adjacent table saved in the memory to manage adjacent node information. An antenna(300) wirelessly connects an external node with the hardware processor.