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公开(公告)号：US06847646B1
公开(公告)日：2005-01-25
申请号：US09017096
申请日：1998-02-02
IPC分类号： H04Q3/00 , H04L12/70 , H04L12/931 , H04L12/933 , H04L12/56
CPC分类号： H04L49/103 , H04L49/108 , H04L49/20 , H04L49/50 , H04L2012/5647 , H04L2012/5651 , H04L2012/5657 , H04L2012/5658 , H04L2012/5682
摘要： A coupling device (switch) for a local network operating in the asynchronous transfer mode (ATM) which comprises a central cell memory (CCM) for buffer storage of packets (frames) formed by individual ATM cells and arriving on feed lines, a central memory control device for controlling the storage in the central cell memory (CCM) and the writing and reading processes of the packets into and from the central cell memory (CCM). The control device includes a counting circuit for counting the ATM cells arriving in the central cell memory (CCM) and a discarding circuit for discarding ATM cells packet by packet for preventing a congestion in the central cell memory (CCM). To enable an efficient buffer management also in the case of very small cell memories, in particular below 1000 cells, the central memory control device comprises at least one comparator device connected upstream of the central cell memory, which comparator device cooperates with the counting circuit and with a control logic such that, when a programmable threshold value (Ldisc) for the degree of filling of the central cell memory (CCM) is reached, a programmable number of links (VC) are defined on the basis of the sequence of arrival of the ATM cells assigned to the relevant link (VC), and in that each ATM cell of the packet belonging to the defined VC value is discarded before it arrives in the central cell memory.
摘要翻译： 一种用于在异步传输模式（ATM）中工作的本地网络的耦合设备（交换机），其包括用于缓冲存储由各ATM单元形成并到达馈线的分组（帧）的中央单元存储器（CCM），中央存储器 用于控制中央单元存储器（CCM）中的存储的控制装置以及来自中央单元存储器（CCM）的分组的写入和读取处理。 控制装置包括用于对到达中央单元存储器（CCM）的ATM单元进行计数的计数电路和用于逐个地逐个丢弃ATM信元的废弃电路，以防止中央单元存储器（CCM）中的拥塞。 为了在非常小的单元存储器（特别是小于1000个单元）的情况下也能够实现高效的缓冲器管理，中央存储器控制设备包括连接到中央单元存储器上游的至少一个比较器设备，比较器设备与计数电路配合， 具有控制逻辑，使得当达到用于中央单元存储器（CCM）的填充程度的可编程阈值（Ldisc）时，基于到达的顺序来定义可编程数量的链接（VC） 分配给相关链路（VC）的ATM信元，并且属于定义的VC值的分组的每个ATM信元在其到达中央信元存储器之前被丢弃。
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公开(公告)号：US06888827B1
公开(公告)日：2005-05-03
申请号：US09105857
申请日：1998-06-26
CPC分类号： H04Q11/0478 , H04L2012/5614 , H04L2012/5626 , H04L2012/563
摘要： The invention relates to a communication system which operates in the asynchronous transfer mode (ATM) and which comprises several nodes which form a network and are partly coupled to one another and to terminals, and which each comprise a switch and a control software at least for controlling the relevant coupling field and for the signaling. At least one object of the control software contains detection points in certain states. An object for event handling of the control software is provided for further processing when a detection point is reached. The object for event handling receives data via a special channel from at least one terminal or from another node.
摘要翻译： 本发明涉及一种在异步传输模式（ATM）中工作的通信系统，其包括形成网络并且部分地彼此耦合到终端的几个节点，并且每个节点包括交换机和至少为 控制相关的耦合场和信号。 控制软件的至少一个对象包含某些状态下的检测点。 提供控制软件的事件处理对象，用于在到达检测点时进一步处理。 用于事件处理的对象通过来自至少一个终端或另一个节点的特殊信道接收数据。
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公开(公告)号：US6076116A
公开(公告)日：2000-06-13
申请号：US17916
申请日：1998-02-03
CPC分类号： H04L12/4637
摘要： The invention relates to a local area network comprising at least a ring system which includes a plurality of network nodes coupled via ring connections, which nodes are used for coupling to a station or a network node of another ring system and for switching packets generated by a station or a network node. Switching software is provided distributed over all the network nodes and stations and at least sufficient for the switching operations. The distributed switching software renders an object available for each respective application, which object is combined to a respective component of object framework software for object registration and routing the messages to and from the object. The distributed switching software in each network node and each station is represented as a distribution plane entity which is used for transmitting and controlling the messages between objects in a station or a network node and another distribution plane entity.
摘要翻译： 本发明涉及一种局域网，其包括至少一个环系统，其包括通过环形连接耦合的多个网络节点，所述多个网络节点用于耦合到另一环系统的站或网络节点，并且用于切换由 站或网络节点。 提供交换软件分布在所有网络节点和站上，并且至少足以进行交换操作。 分布式交换软件使对象可用于每个相应的应用程序，该对象被组合到对象框架软件的相应组件，用于对象注册，并将消息路由到对象和从对象路由。 每个网络节点和每个站中的分布式交换软件被表示为用于在站点或网络节点和另一个分布平面实体中的对象之间的消息的发送和控制的分布平面实体。
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