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1.发明授权Method of determining whether to use preempt/resume or alternate protocol for data transmission 失效确定是否使用抢占/恢复或备用协议进行数据传输的方法
公开(公告)号：US5343473A
公开(公告)日：1994-08-30
申请号：US927697
申请日：1992-08-07
申请人： Israel Cidon , Richard M. Doney , John E. Drake, Jr. , Elizabeth A. Hervatic , Kenneth H. Potter, Jr. , Theodore E. Tedijanto
发明人： Israel Cidon , Richard M. Doney , John E. Drake, Jr. , Elizabeth A. Hervatic , Kenneth H. Potter, Jr. , Theodore E. Tedijanto
CPC分类号： H04L47/2433 , H04L12/6418 , H04L29/06 , H04L47/10 , H04L47/245 , H04L2012/6459 , H04L2012/6464 , H04L2012/6478 , H04L69/32 , H04L69/324
摘要： A method is disclosed for determining whether to use a preempt/resume protocol or an alternate protocol in transmitting data packets from a local system to a remote system. Each system informs the other whether it supports preempt/resume and provides the sizes of the largest low priority data packets it can send and receive. The local system always elects the alternate protocol unless both support preempt/resume. The local system then selects the lesser of (a) the largest low-priority data packet it can send and (b) the largest low-priority data packet the remote system can receive. Use of prompt/resume is initiated by the local system only where a packet of the selected size would be delayed in reaching the remote system by more than a predetermined interval.
摘要翻译： 公开了一种用于确定在从本地系统向远程系统传输数据分组时是否使用抢占/恢复协议或备用协议的方法。 每个系统通知对方是否支持抢占/恢复，并提供可以发送和接收的最大的低优先级数据包的大小。 本地系统始终选择备用协议，除非支持抢占/恢复。 本地系统然后选择（a）可以发送的最大的低优先级数据分组中的较小者，（b）远程系统可以接收的最大的低优先级数据分组。 仅当本地系统启动提示/恢复的使用时，只有当所选大小的数据包将被延迟超过预定间隔到达远程系统时。
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2.发明授权
公开(公告)号：US5461611A
公开(公告)日：1995-10-24
申请号：US255219
申请日：1994-06-07
摘要： A management system for local area networks ensures selected levels of quality of service to all transmission requests submitted to the management system. This management system is attached to the network and receives requests from all other stations on the network to reserve facilities for a particular quality of service data stream. An allocator in the management system determines if the requested facilities are available and, if so, reserves these facilities for the requesting station. If the facilities are not available, the request is denied. A hierarchical data base containing all of the current parameters of all of the network resources and all of the currently supported data streams is used to support the allocation process.
摘要翻译： 用于局域网的管理系统确保提交给管理系统的所有传输请求的所选服务质量水平。 该管理系统附接到网络并且接收来自网络上所有其他站的请求，以为特定服务质量数据流预留设施。 管理系统中的分配器确定所请求的设施是否可用，如果是，则为请求站保留这些设施。 如果设施不可用，请求被拒绝。 使用包含所有网络资源的所有当前参数和所有当前支持的数据流的分层数据库来支持分配过程。
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公开(公告)号：US5634011A
公开(公告)日：1997-05-27
申请号：US517305
申请日：1995-08-21
申请人： Joshua S. Auerbach , John E. Drake, Jr. , Prabandham M. Gopal , Elizabeth A. Hervatic , Marc A. Kaplan , Shay Kutten , Marcia L. Peters , Michael J. Ward
发明人： Joshua S. Auerbach , John E. Drake, Jr. , Prabandham M. Gopal , Elizabeth A. Hervatic , Marc A. Kaplan , Shay Kutten , Marcia L. Peters , Michael J. Ward
CPC分类号： H04L12/1854 , H04L41/042 , H04L12/185 , H04L12/1877 , H04L2012/5626
摘要： A multinode, multicast communications network has a distributed control for the creation, administration and operational mode selection operative in each of the nodes of the network. Each node is provided with a Set Manager for controlling either creation of, administration or access to a set of users to whom a multicast is to be directed. The Set Manager maintains a record of the local membership of all users associated with the node in which the Set Manager resides. A given Set Manager for each designated set of users is assigned the task of being the Set Leader to maintain membership information about the entire set of users in the multicast group. One of the Set Managers in the communications network is designated to be the Registrar which maintains a list of all the Set Leaders in the network. The Registrar insures that there is one and only one Set Leader for each set of users, answers inquiries about the membership of the sets and directs inquiries to appropriate Set Leaders if necessary. All of the set creation, administration and control functions can therefore be carried out by any node of the system and provision is made to assume the function at a new node when failure or partition in the network occurs.
摘要翻译： 多节点组播通信网络具有分布式控制，用于在网络的每个节点中操作的创建，管理和操作模式选择。 每个节点都设有一个集管理器，用于控制要组播多路广播的一组用户的创建，管理或访问。 集管理器维护与Set Manager所在节点相关联的所有用户的本地成员资格记录。 为每个指定的用户组给定的集合管理器被分配为作为集合领导者的任务以维护关于组播组中的整个用户组的成员关系信息。 通信网络中的一个集合管理器被指定为注册服务商，该服务器维护网络中所有集团领导者的列表。 注册服务机构确保每组用户只有一个，只有一个集合领导，回答关于集合成员的查询，并在必要时向相应的集合领导者查询。 因此，所有的创建，管理和控制功能都可以由系统的任何节点执行，并且在网络中发生故障或分区时，将提供在新节点上承担功能。
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公开(公告)号：US5355371A
公开(公告)日：1994-10-11
申请号：US900628
申请日：1982-06-18
申请人： Joshua S. Auerbach , Chee-Seng Chow , John E. Drake, Jr. , Prabandham M. Gopal , Elizabeth A. Hervatic , Marc A. Kaplan , Marcia L. Peters , Michael J. Ward
发明人： Joshua S. Auerbach , Chee-Seng Chow , John E. Drake, Jr. , Prabandham M. Gopal , Elizabeth A. Hervatic , Marc A. Kaplan , Marcia L. Peters , Michael J. Ward
CPC分类号： H04L12/185 , H04L12/1854
摘要： In a multicast network communication system, administration of the communication path making up the multicast tree itself has been separated from control and administration of the network. Creation of a multicast distribution tree and control over the membership thereof, is separately controlled independently from the creation and use of the tree transmission path used to communicate among the members of a multicast set. Transmission distribution trees are set up when a transmission request is received and the properties of the transmission path that is required are known. Transmission paths are created and controlled by all nodes in the communications system, each node having necessary control code and processors for responding to requests from set members to transmit a message to groups of users by creating and activating the necessary tree communication path distribution linkages. A distribution tree is created by the Tree Leader by generating a tree address using a random number generator. A tree address correlator is generated utilizing network and node identifiers unique for the network, and a list of subnodes or users connected for each member of the multicast tree set is generated. Using this information, a tree distribution path is computed to cover all of the subnodes required and a tree set up request message is sent by the Tree Leader along a computed path to each involved subnode. Each subnode returns a message indicating whether the tree address is already in use or is available for use. Successfully negotiated tree addresses are marked at the path link initiation and termination points at each node through the network.
摘要翻译： 在组播网络通信系统中，构成组播树本身的通信路径的管理与网络的控制和管理分离。 独立地创建组播分发树和对其成员的控制，独立于创建和使用用于在组播组的成员之间进行通信的树传输路径。 当接收到发送请求并且已知所需的传输路径的属性时，建立传输分配树。 传输路径由通信系统中的所有节点创建和控制，每个节点具有必要的控制代码和处理器，用于响应来自设备成员的请求，通过创建和激活必要的树通信路径分配链接来发送消息到用户组。 树分配树通过使用随机数生成器生成树形地址来创建分布树。 使用网络唯一的网络和节点标识符生成树地址相关器，并且生成为多播树集的每个成员连接的子节点或用户列表。 使用该信息，计算树分布路径以覆盖所有所需的子节点，并且树结构请求消息沿着计算的路径发送到每个相关子节点。 每个子节点返回一条消息，指示树状地址是否已被使用或可用。 通过网络在每个节点的路径链路启动和终止点标记成功协商的树地址。
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公开(公告)号：US5289460A
公开(公告)日：1994-02-22
申请号：US923125
申请日：1992-07-31
CPC分类号： H04L12/185 , H04L12/1877
摘要： Each node in a multinode communication system is provided with programming to act as a Set Manager for a given set of nodes and users. Functions of the Set Manager include operation processes for creating distribution trees for efficient multicast and bandwidth reservation tasks. Because set membership is not necessarily fixed or accurate at the time the distribution tree is created, the Tree Leader task that creates and maintains the trees needs accurate and updated information showing the number of users at the nodes it serves which are participating in the distribution tree. The count of active users at nodes served by the Tree Leader is provided in response to an indicia established at the time the Tree Leader sets up the tree. Each Set Manager at a given node monitors for changes in set membership and link failure and notifies the requesting Tree Leaders for each tree in which it participates whenever changes in the number of users either by joining or leaving the set or link failures occur by direct communication between the Set Managers and the Tree Leaders without requiring intervention of other elements in the system.
摘要翻译： 多节点通信系统中的每个节点都具有编程功能，可用作给定的一组节点和用户的集管理器。 集管理器的功能包括用于创建分发树的操作过程，用于高效的组播和带宽预留任务。 因为在创建分发树时，集合成员身份不一定是固定的或准确的，所以创建和维护树的Tree Leader任务需要准确和更新的信息，显示正在参与分配树的其所服务的节点上的用户数量 。 响应树树设置树时建立的标记，提供了由Tree Leader服务的节点上的活动用户数。 给定节点上的每个集合管理器监视集合成员资格和链路故障中的更改，并通过加入或离开设置或链接故障直接通信发生的用户数量的变化，通知请求的树形引擎。 集团经理和树领导者之间，不需要系统中其他元素的干预。
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公开(公告)号：US5805578A
公开(公告)日：1998-09-08
申请号：US614421
申请日：1996-03-12
申请人： Paul Alan Stirpe , Dinesh Chandra Verma , Stephen Joseph Nadas , Manish Gupta , Elizabeth A. Hervatic
发明人： Paul Alan Stirpe , Dinesh Chandra Verma , Stephen Joseph Nadas , Manish Gupta , Elizabeth A. Hervatic
摘要： A method of reconfiguring a multipoint communications channel to reconnect selected nodes after failures occur in the network disclosed. The method for this invention requires that a selected node (leader) participating in the multipoint communication channel act as the coordinator of the re-establishment protocol. The coordinator (leader) monitors the state of network topology to determine failures, recomputes an alternative feasible communication channel path in the case of failure, and generates messages to join new network elements in the multipoint communication channel. By using a novel tree recomputation method that rejoins the disconnected subtrees created by the network failure to the tree containing the coordinator, along with network topology information, the coordinator is able to minimize messaging and preserve the original channel to the maximum possible extent. The invention can be practiced in a network which provides quality-of-service characteristics to multipoint connections, by ensuring that the recomputation of the multipoint communication channel preserves the quality-of-service of the original connection.
摘要翻译： 重新配置多点通信信道以在故障发生后所选择的节点重新连接的方法发生在所公开的网络中。 本发明的方法要求参与多点通信信道的所选节点（领导）充当重新建立协议的协调器。 协调员（领导）监视网络拓扑状态以确定故障，在失败的情况下重新计算替代可行的通信信道路径，并生成消息以加入多点通信信道中的新网元。 通过使用新颖的树重新计算方法，将由网络故障创建的断开的子树重新加入包含协调器的树，以及网络拓扑信息，协调器能够最小化消息传递并最大程度地保留原始信道。 本发明可以通过确保多点通信信道的重新计算保留原始连接的服务质量，在为多点连接提供服务质量特性的网络中实现。
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