公开(公告)号：US06606318B2

公开(公告)日：2003-08-12

申请号：US10259425

申请日：2002-09-30

申请人： Yasuhiro Katsube ,  Hisako Tanaka

发明人： Yasuhiro Katsube ,  Hisako Tanaka

IPC分类号： H04L1256

CPC分类号： H04L45/00 ,  H04L45/50 ,  H04L2012/5667

摘要： In a label switched path (LSP) including label switching nodes, some of which process a Time To Live (TTL) value of a generic label header and others of which that do not process the TTL value, an adequate hop-count information regarding the LSP is reported from node to node by using a label distribution protocol. A node, which has received a message including a hop-count of the LSP from an upstream node or a downstream node, determines whether or not the node itself is to update the TTL value in a packet if received through the LSP. The node then transmits a message indicating that the hop-count is one or a message including the incremented hop-count, in accordance with this determination, to the downstream node or the upstream node. Thus, upon transferring packets on the LSP, the nodes forming the LSP that process the TTL value can appropriately decrement the TTL value of the packet.

公开(公告)号：US6167051A

公开(公告)日：2000-12-26

申请号：US891447

申请日：1997-07-10

申请人： Kenichi Nagami ,  Hisako Tanaka ,  Yasuhiro Katsube

发明人： Kenichi Nagami ,  Hisako Tanaka ,  Yasuhiro Katsube

IPC分类号： H04L12/46 ,  H04L12/18 ,  H04L12/70 ,  H04L12/701 ,  H04L12/913 ,  H04Q3/00 ,  H04Q11/04 ,  H04L12/28

CPC分类号： H04L12/1886 ,  H04L12/1854 ,  H04L2012/5614 ,  H04L2012/5619 ,  H04L2012/5642 ,  H04Q11/0478

摘要： A mechanism for performing multicast packet transfer when a certain one of the destination nodes participating in the multicast communication requires resource reservation for a certain packet flow specified among the packet flows to that destination node. A system may transfer multicast packets using a plurality of virtual connections based on which flow the packets to be transferred belong to, so that each node receives the packets without duplication. Alternatively, a system may selectively discard received packets to avoid processing duplicated packets, although duplicated packets are received at each node.

公开(公告)号：US06608833B2

公开(公告)日：2003-08-19

申请号：US10259490

申请日：2002-09-30

申请人： Yasuhiro Katsube ,  Hisako Tanaka

发明人： Yasuhiro Katsube ,  Hisako Tanaka

IPC分类号： H04L1256

CPC分类号： H04L45/00 ,  H04L45/50 ,  H04L2012/5667

摘要： In a label switched path (LSP) including label switching nodes, some of which process a Time To Live (TTL) value of a generic label header and others of which that do not process the TTL value, an adequate hop-count information regarding the LSP is reported from node to node by using a label distribution protocol. A node, which has received a message including a hop-count of the LSP from an upstream node or a downstream node, determines whether or not the node itself is to update the TTL value in a packet if received through the LSP. The node then transmits a message indicating that the hop-count is one or a message including the incremented hop-count, in accordance with this determination, to the downstream node or the upstream node. Thus, upon transferring packets on the LSP, the nodes forming the LSP that process the TTL value can appropriately decrement the TTL value of the packet.

公开(公告)号：US06501756B1

公开(公告)日：2002-12-31

申请号：US09342737

申请日：1999-06-29

申请人： Yasuhiro Katsube ,  Hisako Tanaka

发明人： Yasuhiro Katsube ,  Hisako Tanaka

IPC分类号： H04L1256

CPC分类号： H04L45/00 ,  H04L45/50 ,  H04L2012/5667

摘要： In a label switched path (LSP) including label switching nodes, some of which process a Time To Live (TTL) value of a generic label header and others of which that do not process the TTL value, an adequate hop-count information regarding the LSP is reported from node to node by using a label distribution protocol. A node, which has received a message including a hop-count of the LSP from an upstream node or a downstream node, determines whether or not the node itself is to update the TTL value in a packet if received through the LSP. The node then transmits a message indicating that the hop-count is one or a message including the incremented hop-count, in accordance with this determination, to the downstream node or the upstream node. Thus, upon transferring packets on the LSP, the nodes forming the LSP that process the TTL value can appropriately decrement the TTL value of the packet.

摘要翻译： 在包括标签交换节点的标签交换路径（LSP）中，其中一些处理通用标签头的生存时间（TTL）值，并且其中不处理TTL值的适当的跳数信息 通过使用标签分发协议从节点报告LSP。 接收到包含来自上游节点或下游节点的LSP的跳数的消息的节点，如果通过LSP接收，则确定节点本身是否要更新分组中的TTL值。 然后，该节点根据该确定向下游节点或上游节点发送指示跳数为1的消息或包括递增的跳数的消息。 因此，在LSP上传送报文时，形成处理TTL值的LSP的节点可以适当地减小报文的TTL值。

公开(公告)号：US06341127B1

公开(公告)日：2002-01-22

申请号：US09114177

申请日：1998-07-13

申请人： Yasuhiro Katsube ,  Takeshi Saito ,  Yoshiaki Takabatake ,  Mikio Hashimoto ,  Hisako Tanaka

发明人： Yasuhiro Katsube ,  Takeshi Saito ,  Yoshiaki Takabatake ,  Mikio Hashimoto ,  Hisako Tanaka

IPC分类号： H04Q1104

CPC分类号： H04Q11/04 ,  H04L45/50 ,  H04Q2213/13097 ,  H04Q2213/13103 ,  H04Q2213/13104 ,  H04Q2213/13141 ,  H04Q2213/13196 ,  H04Q2213/13296

摘要： A router device for controlling label switching path set up is disclosed. In the router device, a,policy information indicating a permitted starting point of a label switching path is stored, and a request message that contains a starting point information indicating a starting point node/network of the requested label switching path and a stream information indicating a desired packet stream to be transferred through the requested label switching path is received. Then, whether or not to permit the set up of the requested label switching path is judged by comparing the starting point information contained in the request message with the stored policy information, and the requested label switching path through the router device for the desired packet stream indicated by the stream information contained in the request message is set up when the set up of the requested label switching path is judged as permitted. Instead of the starting point information, a neighbor information, a stream information, or an ending point information may be used.

摘要翻译： 公开了一种用于控制标签切换路径设置的路由器设备。 在路由器装置中，存储表示标签切换路径的允许起始点的策略信息，以及包含指示所请求的标签切换路径的起始点节点/网络的起始点信息的请求消息和表示 接收要通过所请求的标签交换路径传送的期望的分组流。 然后，通过将包含在请求消息中的起始点信息与存储的策略信息进行比较来确定是否允许建立请求的标签交换路径，以及通过路由器设备对所需分组流进行请求的标签交换路径 当请求标签切换路径的建立被判定为允许时，由包含在请求消息中的流信息指示。 代替起点信息，可以使用邻居信息，流信息或终点信息。

公开(公告)号：US06185213B2

公开(公告)日：2001-02-06

申请号：US08960429

申请日：1997-10-29

申请人： Yasuhiro Katsube ,  Hisako Tanaka ,  Kenichi Nagami

发明人： Yasuhiro Katsube ,  Hisako Tanaka ,  Kenichi Nagami

IPC分类号： H04L514

CPC分类号： H04L5/14 ,  H04L12/5601 ,  H04L49/251 ,  H04L49/3009 ,  H04L49/602

摘要： A packet transfer control method and a node device which are capable of providing a dedicated cut-through path for a specific end-to-end packet flow, while reducing a time required until the cut-through path is established, so as to be able to reduce the load of the address analysis processing at the router. One node belonging to one logical network stores an information indicating an existence of a first dedicated virtual path for transferring packet flows specified by a first condition, which is capable of transferring packets without applying a network layer processing up to another node belonging to another logical network, and the communicates an identifier information for identifying a second dedicated virtual path for transferring a packet flow specified by a second condition which is more specific than the first condition by utilizing the first dedicated virtual path, and a condition information for indicating the second condition, in order to set up the second dedicated virtual path up to a termination point node of the first dedicated virtual path or a further downstream side node, between that one node and the termination point node.

摘要翻译： 一种分组传送控制方法和节点装置，其能够为特定的端到端分组流提供专用的直通路径，同时减少直到通过路径建立所需的时间，以便能够 以减少路由器上的地址分析处理的负担。 属于一个逻辑网络的一个节点存储指示用于传送由第一条件指定的分组流的第一专用虚拟路径的存在的信息，该第一条件能够在不应用网络层处理直到另一个逻辑网络的另一个节点 并且通过利用第一专用虚拟路径来传送用于识别用于传送由比第一条件更具体的第二条件指定的分组流的第二专用虚拟路径的标识符信息，以及用于指示第二条件的条件信息， 以便建立第二专用虚拟路径直到第一专用虚拟路径的终端点节点或另一个下游侧节点，在该一个节点和终止点节点之间。

公开(公告)号：US06356553B1

公开(公告)日：2002-03-12

申请号：US09631976

申请日：2000-08-03

申请人： Kenichi Nagami ,  Hisako Tanaka ,  Yasuhiro Katsube

发明人： Kenichi Nagami ,  Hisako Tanaka ,  Yasuhiro Katsube

IPC分类号： H04L1228

CPC分类号： H04L12/1886 ,  H04L12/1854 ,  H04L2012/5614 ,  H04L2012/5619 ,  H04L2012/5642 ,  H04Q11/0478

摘要： A mechanism for performing multicast packet transfer when a certain one of the destination nodes participating in the multicast communication requires resource reservation for a certain packet flow specified among the packet flows to that destination node. A system may transfer multicast packets using a plurality of virtual connections based on which flow the packets to be transferred belong to, so that each node receives the packets without duplication. Alternatively, a system may selectively discard received packets to avoid processing duplicated packets, although duplicated packets are received at each node.

摘要翻译： 当参与多播通信的目的地节点中某一个目的地节点需要资源预留时，在到该目的地节点的分组流中指定的特定分组流时，执行组播分组传送的机制。 系统可以根据要转移的分组属于哪个流，使用多个虚拟连接传输多播分组，使得每个节点不重复地接收分组。 或者，系统可以选择性地丢弃所接收的分组以避免处理复制的分组，尽管在每个节点处接收到重复分组。

公开(公告)号：US6144661A

公开(公告)日：2000-11-07

申请号：US794704

申请日：1997-02-04

申请人： Yasuhiro Katsube ,  Takeshi Saito ,  Hisako Tanaka

发明人： Yasuhiro Katsube ,  Takeshi Saito ,  Hisako Tanaka

IPC分类号： H04L12/18 ,  H04L12/70 ,  H04Q11/04 ,  H04L12/56

CPC分类号： H04L12/1836 ,  H04Q11/0478 ,  H04L12/185 ,  H04L2012/563 ,  H04L2012/5632 ,  H04L2012/5642

摘要： A system for forming one point-to-multipoint connection provides various service attributes in an ATM network in response to differences in service attributes requested by receiving parties or differences in available resources. A network node sets up an output VC (Virtual Channel) link to be connected to an input VC link, the VC links being parts of a point-multipoint connection, receives a new VC link set-up request, and adds to the point-multipoint connection, in response to the new VC link set-up request, new output VC link with service attribute different from that of the input VC link.

摘要翻译： 用于形成一个点对多点连接的系统响应于接收方请求的服务属性的差异或可用资源的差异，在ATM网络中提供各种服务属性。 网络节点设置要连接到输入VC链路的输出VC（虚拟信道）链路，作为点对多点连接的部分的VC链路接收新的VC链路建立请求， 多点连接，响应于新的VC链路建立请求，新的输出VC链路与服务属性不同于输入VC链路。

公开(公告)号：US06515999B1

公开(公告)日：2003-02-04

申请号：US08825935

申请日：1997-04-01

申请人： Kenichi Nagami ,  Hisako Tanaka ,  Yasuhiro Katsube

发明人： Kenichi Nagami ,  Hisako Tanaka ,  Yasuhiro Katsube

IPC分类号： H04L1228

CPC分类号： H04L45/10 ,  H04L45/38

摘要： A router is usable to transfer a packet from a first node belonging to one logical network to a second node belonging to another logical network. The router receives a first message for resource reservation from the second node, and stores a correspondence relationship between a first virtual connection available for receiving a packet of a specified flow from the first node and a second virtual connection available for transmitting the packet of the specified flow to the second node, when the first and second virtual connections exist. The router transmits a second message for resource reservation based on the first message to the first node, when the correspondence relationship can be stored. Alternatively, the router, after transmitting the second message to the first node irrespective of the correspondence relationship, transmits a cancellation message to the first node for canceling the second message depending upon whether the correspondence relationship can be stored.

摘要翻译： 路由器可用于将分组从属于一个逻辑网络的第一节点传送到属于另一逻辑网络的第二节点。 路由器从第二节点接收用于资源预留的第一消息，并且存储可用于接收来自第一节点的指定流的分组的第一虚拟连接与可用于发送指定的分组的分组的第二虚拟连接之间的对应关系 当存在第一和第二虚拟连接时，流到第二节点。 当可以存储对应关系时，路由器将基于第一消息的资源预留的第二消息发送到第一节点。 或者，路由器在不管对应关系如何将第二消息发送到第一节点之后，根据是否可以存储对应关系，向第一节点发送取消消息以取消第二消息。

公开(公告)号：US06304577B1

公开(公告)日：2001-10-16

申请号：US08897708

申请日：1997-07-21

申请人： Kenichi Nagami ,  Yasuhiro Katsube ,  Hisako Tanaka

发明人： Kenichi Nagami ,  Yasuhiro Katsube ,  Hisako Tanaka

IPC分类号： H04L1256

CPC分类号： H04L49/3081 ,  H04L49/254 ,  H04L2012/5619 ,  H04L2012/5632 ,  H04Q11/0478

摘要： A node manages a virtual connection (VC) in a network such that at least one unused virtual connection to the neighboring node is established and registered. When a VC is needed to transmit a packet, the node obtains the required VC by selecting one of the registered unused VCs instead of setting up a new VC. When a VC in use becomes no longer necessary, the node registers the VC as an unused VC instead of releasing the VC.

摘要翻译： 节点管理网络中的虚拟连接（VC），使得至少一个到相邻节点的未使用的虚拟连接被建立和注册。 当VC需要传输数据包时，节点通过选择一个注册的未使用的VC而不是设置新的VC来获得所需的VC。 当不再需要使用VC时，节点将VC注册为未使用的VC，而不是释放VC。