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1.发明公开
公开(公告)号：EP0618708A3
公开(公告)日：1998-06-24
申请号：EP94480016
申请日：1994-02-22
Applicant: IBM
Inventor： BOYLES RAY WILLIAM , GIERLACH MICHAEL FRANCIS , GOPAL PRABANDHAM MADAN , SULTAN ROBERT , VACEK GARY MICHAEL
Abstract: 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.
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公开(公告)号：CA2094409C
公开(公告)日：1998-07-14
申请号：CA2094409
申请日：1993-04-20
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , CHOW CHEE-SENG , DRAKE JOHN ELLIS JR , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM , PETERS MARCIA LAMBERT , WARD MICHAEL JAMES
Abstract: 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.
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公开(公告)号：DE69333105T2
公开(公告)日：2004-06-03
申请号：DE69333105
申请日：1993-05-05
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , DRAKE JR , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM , KUTTEN SHAY , PETERS MARCIA LAMBERT , WARD MICHAEL JAMES
Abstract: 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.
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公开(公告)号：CA2094410C
公开(公告)日：1998-05-05
申请号：CA2094410
申请日：1993-04-20
Applicant: IBM
Inventor： HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM , KUTTEN SHAY , WARD MICHAEL JAMES , PETERS MARCIA LAMBERT , GOPAL PRABANDHAM MADAN , DRAKE JOHN ELLIS JR , AUERBACH JOSHUA SETH
Abstract: 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.
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公开(公告)号：AU3839093A
公开(公告)日：1993-12-23
申请号：AU3839093
申请日：1993-05-06
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , DRAKE JOHN ELLIS JR , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM , KUTTEN SHAY , PETERS MARCIA LAMBERT , WARD MICHAEL JAMES
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：DE69333105D1
公开(公告)日：2003-08-28
申请号：DE69333105
申请日：1993-05-05
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , DRAKE JR , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM , KUTTEN SHAY , PETERS MARCIA LAMBERT , WARD MICHAEL JAMES
Abstract: 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.
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公开(公告)号：DE69327017D1
公开(公告)日：1999-12-23
申请号：DE69327017
申请日：1993-05-19
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , CHOW CHEE-SENG , PETERS MARCIA LAMBERT , DRAKE JOHN ELLIS , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM
Abstract: 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.
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公开(公告)号：AT186803T
公开(公告)日：1999-12-15
申请号：AT93480060
申请日：1993-05-19
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , CHOW CHEE-SENG , PETERS MARCIA LAMBERT , DRAKE JOHN ELLIS JR , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM
Abstract: 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.
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公开(公告)号：AT245877T
公开(公告)日：2003-08-15
申请号：AT93480056
申请日：1993-05-05
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , DRAKE JOHN ELLIS JR , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM , KUTTEN SHAY , PETERS MARCIA LAMBERT , WARD MICHAEL JAMES
Abstract: 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.
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公开(公告)号：DE69327017T2
公开(公告)日：2000-05-25
申请号：DE69327017
申请日：1993-05-19
Applicant: IBM
Inventor： AUERBACH JOSHUA SETH , CHOW CHEE-SENG , PETERS MARCIA LAMBERT , DRAKE JOHN ELLIS , GOPAL PRABANDHAM MADAN , HERVATIC ELIZABETH ANNE , KAPLAN MARC ADAM
Abstract: 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.
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