CA2380148A1 - Method and apparatus for activity-based collaboration by a computer system equipped with a communications manager - Google Patents

Method and apparatus for activity-based collaboration by a computer system equipped with a communications manager Download PDF

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Publication number
CA2380148A1
CA2380148A1 CA002380148A CA2380148A CA2380148A1 CA 2380148 A1 CA2380148 A1 CA 2380148A1 CA 002380148 A CA002380148 A CA 002380148A CA 2380148 A CA2380148 A CA 2380148A CA 2380148 A1 CA2380148 A1 CA 2380148A1
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Canada
Prior art keywords
network
capable device
local
accordance
data change
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Granted
Application number
CA002380148A
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French (fr)
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CA2380148C (en
Inventor
Raymond E. Ozzie
Kenneth G. Moore
Robert H. Myhill
Brian M. Lambert
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Microsoft Technology Licensing LLC
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Individual
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Publication of CA2380148A1 publication Critical patent/CA2380148A1/en
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Publication of CA2380148C publication Critical patent/CA2380148C/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1813—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for computer conferences, e.g. chat rooms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/131—Protocols for games, networked simulations or virtual reality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]

Abstract

A communications manager provides communication services for an activity-based collaboration system, in which data change requests comprising deltas are communicated over a network between network-capable devices. The communications manager is operable on a local network capable device for sending locally-generated deltas over the network to at least one remote network-capable device and for receiving remotely-generated deltas over the network from the at least one remote network-capable device. The communications manager can send the deltas via unicasting, muticasting, or broadcasting techniques. The communications manager is responsive to network connection status information indicating that the remote network-capable device is connected to the network for sending the local deltas directly to an address for the remote network-capable device. A presence mechanism maintains and distributes, on request, the network connection status information, which it acquires from each of the network-capable devices. The communications manager is also responsive to the network connection status information indicating that the remote network-capable device is disconnected from the network for sending the local deltas to an address of a relay. The relay stores deltas until the relay is notified that the remote network-capable device has reconnected to the network, and then the relay sends the deltas to the reconnected remote network-capable device.

Claims (37)

1. A local network-capable device adapted for collaborative operation and communication over a network with at least one remote network-capable device, said local network-capable device comprising:
A) a memory for storing a local copy of data in accordance with a data model;
B) a data-change engine coupled with the memory, and responsive to a plurality of data change requests, for controlling storage of the local copy of data in the memory in accordance with the data model and making changes to the local copy of the data; the data change requests including a locally-generated data change request and a remotely-generated data change request;
C) a dynamics manager, coupled with the data-change engine, and responsive to the data change requests for controlling the engine and coordinating execution of the data change requests;
D) a communications manager, coupled with the dynamics manager for sending the locally-generated data change request to the at least one remote capable-device and for receiving the remotely-generated data change request.
2. The local network-capable device in accordance with claim 1, wherein the communications manager can selectively send the local data change request directly to the at least one remote network-capable in response to a network connection status of the remote network-capable device.
3. The local network-capable device in accordance with claim 1, wherein the communications manager is responsive to a presence mechanism for sending the local data change request over the network to the at least one remote network-capable device when the at least one remote network-capable device is connected to the network, and for sending the local data change request over the network to a relay if the at least one remote network-capable device is disconnected from the network.
4. The local network-capable device in accordance with claim 3, wherein the communications manager directs the relay to forward the local data change request to the at the least one remote network-capable device when the at the least one remote network-capable device is reconnected to the network.
5. The local network-capable device in accordance with claim 3, wherein the communications manager sends to the presence mechanism over the network a connection status notification indicating whether the local network-capable device is connected to the network and therefore capable of receiving the remotely-generated data change request.
6. The local network-capable device in accordance with claim 3, wherein the communications manager receives a remotely-generated data change request from the remote network-capable device and forwards the received data change request to the dynamics manager; and wherein the dynamics manager directs the data-change engine to execute the received remotely-generated data-change request.
7. The local network-capable device in accordance with claim 3, in combination with the presence mechanism and the relay.
8. The combination in accordance with claim 7, wherein the presence mechanism stores an indication of online/offline status for the local and remote network-capable devices.
9. The combination in accordance with claim 8, wherein the communications manager sends the locally-generated data change request over the network to the relay if the at least one remote network-capable device is disconnected from the network; the relay comprises a store and forward relay having a relay memory; and the relay stores the locally-generated data change request in the relay memory, and forwards the locally-generated data change request to the at least one remote network-capable device when the at least one remote network-capable device is connected to the network.
10. The combination in accordance with claim 7, wherein the at least one remote network-capable device includes a plurality of remote network-capable devices;
and the relay, responsive to the communications manager, is capable of forwarding the locally-generated data change request to the plurality of remote network-capable devices using multicasting.
11. The combination in accordance with claim 10, wherein the communications manager can send the local data change request, responsive to least latency information, by one of direct communication and intermediary communication;
the direct communication comprising sending the local data change request directly to one or more of the remote network-capable devices; and the intermediary communication comprising sending the local data change request to one or more of the remote network-capable devices via the relay.
12. The combination in accordance with claim 10, wherein the communications manager can send the local data change request, responsive to least cost information, by one of direct communication and intermediary communication;
the direct communication comprising sending the local data change request directly to one or more of the remote network-capable devices; and the intermediary communication comprising sending the local data change request to one or more of the remote network-capable devices via the relay.
13. A distributed, coordinated system for maintaining plural copies of data pursuant to a distributed data model, which copies can be changed responsive to users' actions by a plurality of computer systems, the system comprising:
A) a plurality of computer systems, each of the computer systems capable of locally generating a plurality of data change requests for changing a local copy of the data and of executing data change requests including the locally-generated data change requests and remotely-generated data change requests generated by others of the computer systems so as to make the requested changes to the local copy of the data; each of the computer systems including a communications manager for transmitting locally-generated data change requests over a network to destinations comprising others of the computer systems and for receiving remotely-generated data change requests over the network from the others of the computer systems; and B) a relay for receiving data change requests transmitted from one of the communications managers and forwarding the received data change requests when the destinations are connected to the network.
14. The system in accordance with claim 13, further comprising a presence server coupled over the network with the computer systems for storing information indicating whether each of the computer systems is connected or disconnected from the network.
15. The system in accordance with claim 14, wherein the communications managers transmitted data change requests directly to destinations connected to the network, and send data change requests via the relay for destinations disconnected at least temporarily from the network.
16. The system in accordance with claim 13, wherein the communications managers can determine whether to send data change requests directly to destinations or via the relay based at least in part on least cost routing information.
17. The system in accordance with claim 13, wherein the communications managers can determine whether to send data change requests directly to destinations or via the relay based at least in part on least latency routing information.
18. The system in accordance with claim 13, wherein each computer system further comprises:
A) a tool for receiving local data change requests;
B) an engine separate from the tool for controlling the local copy of the plural copies of the data, and for making changes to the local copy in accordance with the data model; and C) a dynamics manager, responsive to the local and remote data change requests, for controlling the engine in making the change.
19. A framework apparatus for providing communication services for an activity-based collaboration system in which data change requests comprising deltas are communicated over a network between network-capable devices, the framework apparatus comprising a communications manager operable on a local network capable device for sending locally-generated deltas over a network to at least one remote network-capable devices and for receiving remotely-generated deltas from the at least one remote network-capable device; the communications manager being responsive to network connection status information indicating that the remote network-capable device is connected to the network for sending the local deltas directly to an address for the remote network-capable device, and responsive to network connection status information indicating that the remote network-capable device is disconnected from the network for sending the local deltas to an address of a relay.
20. The framework apparatus in accordance with claim 19, wherein the communications manager receives the network connection status information over the network from a presence mechanism.
21. The framework apparatus in accordance with claim 19, further comprising computer readable media, and wherein the communications manager comprises computer-readable program code stored on the media.
22. The framework apparatus in accordance with claim 19, in combination with the relay, wherein the relay includes a memory for storing deltas until the relay is notified that the remote network-capable device has reconnected to the network, and a transmitter for sending the deltas to the reconnected remote network-capable device.
23. The framework apparatus in accordance with claim 19, wherein the communications manager includes means for sending a network connection status notification to the presence server indicating whether the local network-capable device is connected to the network and therefore capable of receipt of deltas from remote network-capable devices.
24. The framework apparatus in accordance with claim 19, further comprising a dynamics manager, responsive to the locally-generated and remotely generated deltas, for controlling a data-change engine included in the local network-capable device for making changes to stored data as indicated by the locally-generated and remotely-generated deltas.
25. The framework apparatus in accordance with claim 24, further comprising computer readable media, and wherein the communications manager and the dynamics manager each comprise computer-readable program code stored on the media.
26. A method for providing communication services for an activity-based collaboration system, in which data change requests comprising deltas are communicated over a network between network-capable devices, the method comprising the steps of:
A) sending locally-generated deltas from a local network-capable device over a network to at least one remote network-capable devices and for receiving remotely-generated deltas from the at least one remote network-capable device;

B) responsive to network connection status information indicating that the remote network-capable device is connected to the network, sending the local deltas directly to an address for the remote network-capable device;
C) responsive to network connection status information indicating that the remote network-capable device is disconnected from the network, sending the local deltas to an address of a relay.
27. The method in accordance with claim 26, wherein the network connection status information includes online/offline status information, and the method further comprises the step of receiving the online/offline status information over the network from a presence mechanism.
28. The method in accordance with claim 27, further comprising the step of a presence mechanism maintaining and distributing, over the network, the online/offline status information; the presence mechanism acquiring the online/offline status information for each of the network-capable devices by an online/offline notification from each of the network-capables device.
29. The method in accordance with claim 27, further comprising the step of the relay storing deltas until the relay is notified that the remote network-capable device has reconnected to the network, and the relay sending the deltas to the reconnected remote network-capable device.
30. The method in accordance with claim 26, further comprising the step of the local network-capable device sending an online/offline status notification to the presence server indicating whether the local network-capable device is connected to the network and therefore capable of receipt of deltas from remote network-capable devices.
31. The method in accordance with claim 26, further comprising the step of a communications manager included in the local network-capable device determining the connectability of the at least one remote network-capable device from connectability information included in the network status information and maintained by the communications manager.
32. The method in accordance with claim 31, further comprising the step of maintaining, by a presence mechanism, online/offline status information for the at least one remote network-capable device; the online/offline status information being included in the network connection status information.
33. The method in accordance with claim 26, further comprising persistently storing the locally-generated deltas in the local network-capable device until the deltas can be sent to the at least one remote network-capable device.
34. The method in accordance with claim 26, wherein the sending step sends the locally-generated deltas to a plurality of remote network-capable devices, the sending step including the step of multicasting the locally generated deltas to the remote network-capable devices.
35. The method in accordance with claim 26, further comprising the step of repeating the sending step if an acknowledgement message is not received from the at least one remote network-capable device for up to a maximum number of retries.
36. The method in accordance with claim 35, further comprising associating time-to-live data with each of the deltas, and discarding each of the deltas after the associated time-to-live has expired.
37. The method in accordance with claim 26, wherein the sending step includes the step of directing the message to the at least one remote network-capable devices in response to identity information stored in the local network-capable device.
CA002380148A 1999-07-19 2000-06-28 Method and apparatus for activity-based collaboration by a computer system equipped with a communications manager Expired - Lifetime CA2380148C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/357,007 US6640241B1 (en) 1999-07-19 1999-07-19 Method and apparatus for activity-based collaboration by a computer system equipped with a communications manager
US09/357,007 1999-07-19
PCT/US2000/017785 WO2001006365A2 (en) 1999-07-19 2000-06-28 Method and apparatus for activity-based collaboration by a computer system equipped with a communications manager

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CA2380148A1 true CA2380148A1 (en) 2001-01-25
CA2380148C CA2380148C (en) 2009-12-01

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US (1) US6640241B1 (en)
EP (1) EP1328882B1 (en)
JP (1) JP4564697B2 (en)
KR (1) KR100722916B1 (en)
AT (1) ATE393433T1 (en)
CA (1) CA2380148C (en)
DE (1) DE60038705T2 (en)
IL (2) IL147704A0 (en)
WO (1) WO2001006365A2 (en)

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