[특허]Dynamically controlled routing using virtual nodes

Dynamically controlled routing using virtual nodes 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04M-007/00 H04M-003/42 H04J-003/24
출원번호	US-0329716 (1994-10-26)
발명자 / 주소	Bdard Francois (Verdun CAX) Rgnier Jean (Laval CAX) Caron France (Verdun CAX)
출원인 / 주소	Northern Telecom Limited (Montreal CAX 03)
인용정보	피인용 횟수 : 96 인용 특허 : 0

초록 ▼

A dynamically controlled routing (DCR) telecommunications network is formed by a plurality of network switching elements, each connected to at least one other by at least one circuit group for carrying calls therebetween, and a network processor connected to the network elements by data links. Each network switching element determines, for each call, a neighboring network element to which it should be routed. It does so by accessing a routing table which contains alternate routes to be attempted if a direct route either does not exist or cannot be used. The routing tables are updated periodically by the network controller. The DCR network functions as a group of nodes interconnected by links and routing takes place on a node-to-node basis. At least one of the nodes is a logical entity which does not necessarily have a direct correspondence to a single physical network element but rather corresponds to a group of at least one physical component which may be a network element, a part of a network element, or a plurality of network elements or parts thereof. Likewise, a link to the virtual node does not necessarily correspond to a circuit group but comprises the set of direct circuit groups connecting to the components of the virtual node. DCR networks employing virtual nodes have increased flexibility. For example, final destinations outside the DCR network can be associated with the virtual node ifs an intermediate destination node, thereby allowing a call to exit the DCR network via any of the components of the virtual node rather than via only one Unique Exit Gateway.

대표청구항 ▼

A telecommunications network comprising: a plurality of network nodes and links, the network nodes comprising origin nodes, each comprising a switching element capable of routing calls within the network, and destination nodes serving as destinations for such calls, some of said network nodes being tandem nodes, each tandem node serving as both a destination node and an origin node; each link interconnecting directly an origin node and a destination node and comprising one or more circuit groups, each of the switching elements having storage means for routing information, the routing information comprising (i) a listing of destination nodes; (ii) associated with each destination node, a corresponding link, where such a link exists; (iii) for each link, a corresponding group of one or more circuit groups outgoing from the switching element; and (iv) associated with each destination node, a list of zero or more tandem nodes; the network further comprising means for updating the routing information; each switching element comprising means for translating address data of a call to determine a destination node for the call and (i) where a link to the destination node exists, attempting to route the call to the destination node via a circuit group that is in the link; (ii) where a link to the destination node is not available, accessing its routing table to select a tandem node and attempting to route the call via a link to the tandem node; wherein said listing of destination nodes of at least one of said switching elements comprises a virtual destination node representing a group of two or more components, each component being a distinct physical network element, there being one or more distinct circuit groups associated with each component, and each link from a particular origin node to the virtual destination node is a set of circuit groups from the switching element at that particular origin node to the two or more components of the virtual destination node.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Dynamically controlled routing using virtual nodes 원문보기

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Dynamically controlled routing using virtual nodes 원문보기

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