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公开(公告)号：US5511208A
公开(公告)日：1996-04-23
申请号：US35852
申请日：1993-03-23
IPC分类号： G06F13/00 , H04L29/06 , H04L29/08 , G06F13/14 , G06F15/173
摘要： A computer network in which resources are dynamically located through the use of LOCATE requests includes multiple cache server nodes, network nodes which have an additional obligation to build and maintain large caches of directory entries. Cache server nodes play a key role in the LOCATE process and can prevent redundant network-wide broadcasts of LOCATE requests. Where an origin cache server node receives a request from a served node, the cache server node searches its local directories first, then forwards the request to alternate cache server nodes if necessary. If the necessary information isn't found locally or in alternate cache server nodes, the LOCATE request is then broadcast to all network nodes in the network. If the broadcast results are negative, the request is forwarded to selected gateway nodes to permit the search to continue in adjacent networks.
摘要翻译： 通过使用LOCATE请求动态定位资源的计算机网络包括多个缓存服务器节点，具有构建和维护目录条目的大型缓存的额外义务的多个缓存服务器节点。 缓存服务器节点在LOCATE进程中起关键作用，可以防止LOCATE请求的全网广播广播。 当源缓存服务器节点从服务节点接收到请求时，缓存服务器节点首先搜索其本地目录，然后如果需要，将请求转发到备用高速缓存服务器节点。 如果本地或备用高速缓存服务器节点中没有找到必要的信息，则LOCATE请求将广播到网络中的所有网络节点。 如果广播结果是否定的，则将该请求转发到所选网关节点，以允许搜索在相邻网络中继续进行。
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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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