Personal conferencing system

• US 6,151,621 A
• Filed: 03/19/1998
• Issued: 11/21/2000
• Est. Priority Date: 04/10/1997
• Status: Expired due to Fees

• Current Assignee: Tetra Real Estate LP (Tetra Technologies Incorporated)
• Original Assignee: International Business Machines Corporation
• Inventors: Sethi, Vince, Colyer, Adrian Mark, Key, Andrew
• Primary Examiner(s): Asta, Frank J.
• Assistant Examiner(s): Jaroenchonwanit, Bunjob
• Application Number:
  US09/044,459
• Time in Patent Office: 978 Days
• Field of Search: 709/204, 709/205, 709/201, 709/203, 709/208, 709/209, 709/217, 709/227, 709/304, 370/260, 345/330, 345/1, 345/331, 710/110, 711/1, 340/825.01, 340/825.04, 340/825.02, 340/825.03
• US Class Current: 709/204
• CPC Class Codes: G06F 9/54 Interprogram communication
• CPC Class Codes: G06Q 10/10 Office automation; Time management

Abstract

There is described a personal conferencing method and system for a client (32)/server (30) environment. The server (30) stores conference model data (60) such as a shared chalkboard or a molecular model and each client has a copy of the conference model data (61). When one of said clients (32A, 32B, 32C) edits the model (61) it creates an instruction (64A) for operating on the model and sends the instruction (64A) to the server (30). The server (30) operates (62) on its conference model data (60) on receipt of the instruction (64A) and resends the instruction (64B) to each of the clients (32A, 32B, 32C) and each client (32A, 32B, 32C) performs the same operation (63) on their respective copies of the conference data model (61). Whereby after a plurality of different operating instructions (64B) from different clients (32A, 32B, 32C) the respective copies of the conference model data (60) are equivalent.

Claims

1. A method for controlling a personal conference between a server (30) and one or more clients (32A,32B, 32C) for sharing common conference model data (60) comprising:

storing the conference model data (60) on each client in the conference;

generating, at a client, a pre-instruction representing an operation on the conference model data (60) and sending the pre-instruction from the client to the server (30);

receiving at the server the pre-instruction from the client;

broadcasting an instruction, in response to the pre-instruction, for operating on the conference model from the server to all the clients; and

operating on the conference model, at each client, according the broadcast instruction;

whereby the server provides a centralized meeting place for clients to advertise and participate in shared work and whereby each client receives broadcast instructions in the same order and performs operations on its respective conference data model in the same order so that all copies of the conference model data remain consistent.

2. A method as claimed in claim 1 further whereby the pre-instructions are received by the server in a particular order and the instructions broadcast in the same order.

3. A method as claimed in claim 1 further comprising:

storing the conference model data on the server computer;

identifying a request from a new client wishing to participate in the conference;

sending said server stored conference model data to the new client computer.

4. A method as claimed in claim 1 further comprising:

storing a client program on the server, said program coded in a universal machine hosted byte code;

identifying a request from a new client wishing to partake in the conference; and

sending the same client program to the requesting client regardless of the type of operating system used by the client.

5. A method as claimed in claim 4 wherein the clients connect to the server over a TCP/IP network and the client use a virtual machine in a TCP/IP browser to operate the client program.

6. A method as claimed in claim 5 wherein each instruction comprises operation code for the client program.

7. A personal conferencing system for sharing common conference model data (60) between a server (30) and one or more clients (32A,32B, 32C),

two or more clients (32A, 32B, 33C), each client comprising:

means for storing the conference model data (60);

means for generating a pre-instruction representing an operation for performance on the stored conference model data (60);

means for sending the pre-instruction to the server (30);

means for receiving an instruction from the server;

means for operating on the conference model according the received instruction;

said server comprising;

means for receiving the pre-instruction from a client; and

means for broadcasting an instruction to all clients in the personal conferencing system;

whereby the server provides a centralized meeting place for clients to advertise and participate in shared work and whereby each client receives instructions and performs operations on its respective conference data model in the same order as other clients so that all copies of the conference model data remain consistent.

8. A system as claimed in claim 7 further comprising means for receiving the pre-instructions in a particular order and means for broadcasting the instructions in the same particular order.

9. A system as claimed in claim 7 further comprising:

means for storing the conference model data on the server computer;

means for identifying a request from a new client wishing to participate in the conference;

means for sending said server stored conference model data to the new client computer.

10. A system as claimed in claim 7 further comprising:

means for storing a client program on the server, said program coded in a universal machine hosted byte code;

means for identifying a request from a new client wishing to partake in the conference; and

means for sending the same client program to the requesting client regardless of the type of operating system used by the client.

11. A system as claimed in claim 10 wherein each client connects to the server over a TCP/IP network and each client comprises a virtual machine and a TCP/IP browser to operate the client program.

12. A method as claimed in claim 7 wherein each confirmation instruction comprises operation code for the client program.

13. A computer program product, stored on a computer-readable storage medium, for executing computer program instructions to carry out the steps of a method for controlling a personal conference between a server (30) and one or more clients (32A,32B, 32C) for sharing common conference model data (60);

said method steps comprising;

storing conference model data (60) on each client in the conference;

generating, at a client, a pre-instruction representing an operation on the conference model data (60);

sending the pre-instruction from the client to the server (30);

receiving at the server the pre-instruction from the client;

broadcasting a corresponding instruction from the server to all the clients in response to the pre-instruction; and

operating on the conference model, at each client, according the received instruction;

whereby the server provides a centralized meeting place for clients to advertise and participate in shared work and whereby each client receives instructions and performs operations on its respective conference data model in the same order as other clients so that all copies of the conference model data remain consistent.

14. A computer program product as claimed in claim 13 further whereby the pre-instructions are received by the server in a particular order and the instructions broadcast in the same particular order.

15. A computer program product as claimed in claim 13 further comprising:

storing the conference model data on the server computer;

identifying a request from a new client wishing to participate in the conference;

sending said server stored conference model data to the new client computer.

16. A computer program product as claimed in claim 13 further comprising:

storing a client program on the server, said program coded in a universal machine hosted byte code;

identifying a request from a new client wishing to partake in the conference; and

sending the same client program to the requesting client regardless of the type of operating system used by the client.

17. A method as claimed in claim 16 wherein the clients connect to the server over a TCP/IP network and the client use a virtual machine in a TCP/IP browser to operate the client program.

18. A method as claimed in claim 13 wherein each confirmation instruction comprises operation code for the client program.