System and method for transmitting data from a server application to more than one client node

• US 6,438,598 B1
• Filed: 05/13/1999
• Issued: 08/20/2002
• Est. Priority Date: 05/14/1997
• Status: Expired due to Term

• Current Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Original Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Inventors: Pedersen, Bradley J.
• Primary Examiner(s): Maung, Zarni
• Application Number:
  US09/311,158
• Time in Patent Office: 1,195 Days
• Field of Search: 709/227, 709/238, 709/203, 709/230, 709/249, 709/250, 709/217
• US Class Current: 709/227
• CPC Class Codes: G06F 9/542 Event management; Broadcasting; Multicasting; Notifications
• CPC Class Codes: H04L 12/1895 for short real-time information, e.g. alarms, notifications, alerts, updates
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

The invention relates to a system and method for transmitting the same data to more than one client node substantially simultaneously. In one embodiment the invention relates to a method for transmitting the same data substantially simultaneously from an application executing on a server node to at least two client nodes. The method includes the steps of providing a connection between a first client node and a first client protocol stack and between the application and the first client protocol stack; associating a first minimal communications protocol stack with the first client protocol stack; providing a connection between the application and the first minimal communications protocol stack and between a second client node and a second client protocol stack; associating a second minimal communications protocol stack with the second client protocol stack; providing a connection between the first minimal protocol stack and the second minimal protocol stack; and between the second minimal protocol stack and said the client protocol stack. The method then transmits data from the application program to the first client protocol stack and the first minimal protocol stack substantially simultaneously.

The invention also relates to a communication system including a server node including: an application program, a first client protocol stack in electrical communication with the application program, a first minimal protocol stack in electrical communication with the application program; a second minimal protocol stack in electrical communication with the first minimal protocol stack; and a second client protocol stack in electrical communication with the second minimal protocol stack.

Claims

1. In a client-server network, a system for transmitting data associated with an application program to a plurality of client nodes, comprising:

a server node executing an application program in response to a request from a first client node to execute the application program;

a first connection between the server node and the first client node established in response to the request, the first connection including a first protocol stack on the server node for directing communications between the application program and the first client node;

a second connection between the server node and a second client node established in response to a request from the second client node to access the application program, the second connection including a second protocol stack on the server node associated with the first protocol stack; and

a multiplexer in communication with each connection and the application program executing on the server node,

wherein the multiplexer substantially simultaneously transmits application data associated with the application program to the first and second protocol stacks.

2. The system of claim 1 wherein the application data transmitted to the second protocol stack includes a copy of the application data transmitted to the first protocol stack.

3. The system of claim 1 wherein the second connection further comprises a third protocol stack on the server node in communication with the second protocol stack, and a fourth protocol stack on the server node in communication with the third protocol stack.

4. The system of claim 1 wherein the server node further comprises an execution environment in which to execute the application program, the execution environment concurrently communicating with the first protocol stack and each protocol stack associated with the first protocol stack.

5. The system of claim 1 wherein each protocol stack includes a set of protocol modules and the set of protocol modules in the second protocol stack differs from the set of protocol modules in the first protocol stack.

6. The system of claim 1 wherein the server node is a first server node, and further comprising a second server node in communication with the first server node and the first client node, and wherein the first connection between the first client node and the first server node is through the second server node.

7. A method for communicating between an application program executing on a server node and a plurality of client nodes, the method comprising the steps of:

executing an application program on the server node in response to a request from a first client node to execute the application program;

establishing a first connection between the first client node and the server node in response to the request using a first protocol stack on the server node;

establishing a second connection between a second client node and the server node using a second protocol stack on the server node in response to a request from the second client node to access the application program;

substantially simultaneously transmitting application data associated with the application program through the first and second connections to the first and second client nodes, respectively.

8. The method of claim 7 further comprising the steps of:

transmitting input data through one of the connections from one of the client nodes to the application program executing on the server node; and

transmitting the input data to the other client node through the other connection.

9. The method of claim 7 wherein the application data transmitted through the second connection includes a copy of the application data transmitted to the first connection.

10. The method of claim 7 further comprising the steps of:

generating a third protocol stack on the server node in communication with the second protocol stack; and

generating a fourth protocol stack on the server node in communication with the third protocol stack and the second client node,

wherein the second connection includes the third and fourth protocol stacks.

11. The method of claim 7 further comprising the steps of:

providing an execution environment on the server node within which to execute the application program; and

associating the execution environment with the first and second protocol stacks.

12. The method of claim 7 wherein the application program is a first application program and the second connection includes a third protocol stack on the server node, and further comprising the steps of:

executing a second application program on the server node in response to a request from the second client node to execute the second application program;

associating an execution environment for executing the second application program with the third protocol stack;

transmitting application data associated with execution of the first application program through the second and third protocol stacks of the second connection; and

transmitting application data associated with execution of the second application program through the third protocol stack.

13. The method of claim 7 further comprising the steps of:

generating a new protocol stack for each additional client node requesting access to the application program executing on the server node;

associating each new protocol stack with the first protocol stack;

establishing for each new protocol stack a new connection between the application program executing on the server node and the additional client node associated with that new protocol stack; and

substantially simultaneously transmitting application data associated with the application program through each new connection to each additional client node.