Systems and methods for providing client-side accelerated access to remote applications via TCP buffering

• US 8,954,595 B2
• Filed: 12/30/2005
• Issued: 02/10/2015
• Est. Priority Date: 12/30/2004
• Status: Active Grant

• Current Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Original Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Inventors: Sundarrajan, Prabakar, He, Junxiao, Verzunov, Sergey, Venkatraman, Charu, Shetty, Anil
• Primary Examiner(s): Nawaz, Asad
• Assistant Examiner(s): CHANG, STEPHANIE L
• Application Number:
  US11/324,140
• Publication Number:
  US 20060195605A1
• Time in Patent Office: 3,329 Days
• Field of Search: 709/223, 709/203, 709/206, 709230-237, 709/217, 709/219, 370/230, 370/231, 345/333, 345/352, 714/748, 714/749
• US Class Current: 709/230
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/19 at layers above the network layer network arrangements for networked applications for scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04L 47/263 Rate modification at the source after receiving feedback
• CPC Class Codes: H04L 47/43 Assembling or disassembling of packets, e.g. segmentation and reassembly [SAR]
• CPC Class Codes: H04L 63/0272 Virtual private networks
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload

Abstract

The present invention is directed towards systems and methods for dynamically deploying and executing acceleration functionality on a client to improve the performance and delivery of remotely accessed applications. In one embodiment, the client-side acceleration functionality is provided by an acceleration program that performs a transport layer connection buffering technique for improving performance of communications and delivery of a remotely-accessed application. The acceleration program establishes a transport layer connection from the client to the server and buffers requests of the client based on determining a difference between a rate of consumption of responses received by the client from a server and a rate of production of requests transmitted by the client to the server. As such, the acceleration program can throttle transmissions of the client if the client'"'"'s rate of consumption falls behind the rate of submission of requests.

Claims

1. A method for managing on a client a difference between a rate of consumption of responses received from a server and a rate of production of requests transmitted to the server, the method comprising:

intercepting, by an acceleration program on the client, a request by an application to access a server, the acceleration program communicating with the server on behalf of the application via a transport layer connection;

receiving, by the acceleration program via the transport layer connection, a plurality of responses from the server;

storing, by the acceleration program, the plurality of received responses from the server in a buffer of the client;

consuming, by the client from the buffer, the plurality of stored received responses at a protocol layer above a transport layer of the transport layer connection;

determining, by the acceleration program, a difference between a rate of consumption of stored received responses from the buffer at the protocol layer and a rate of production of requests transmitted by the client falls below a predetermined threshold;

storing, by the acceleration program, and responsive to the determination, the request in a memory element of the client; and

determining, by the acceleration program, to transmit the stored request based on a change in one of the rate of consumption or the rate of production by the client.

2. The method of claim 1, wherein the rate of consumption is less than the rate of production.

3. The method of claim 1, comprising transmitting, by an appliance, the acceleration program to the client upon a request from the client to establish a connection to the server.

4. The method of claim 3, comprising upon receipt of the acceleration program, automatically installing and executing, by the client, the acceleration program.

5. The method of claim 1, wherein the acceleration program comprises a filter device driver interfaced to a transport layer of a network stack of the client.

6. The method of claim 1, comprising compressing, by the acceleration program, the request stored in the memory element.

7. The method of claim 1, comprising providing, by the acceleration program, a pool of one or more transport layer connections for accessing the server by the application on the client.

8. The method of claim 1, comprising multiplexing, by the acceleration program, requests from a plurality of applications on the client via the transport layer connection.

9. The method of claim 1, comprising executing, by the client, the acceleration program, transparently to one of a network layer, a session layer, or the application layer of a network stack of the client.

10. The method of claim 1, comprising executing, by the client, the acceleration program, transparently to one of the application or the server.

11. A system for managing on a client a difference between a rate of consumption of responses received from a server and a rate of production of requests transmitted to the server, the system comprising:

means for intercepting, by an acceleration program on the client, a request by an application to access a server, the acceleration program communicating with the server on behalf of the application via a transport layer connection;

means for receiving, by the acceleration program via the transport layer connection, a plurality of responses from the server;

a buffer for storing, by the acceleration program, the plurality of received responses from the server;

means for consuming, by the client from the buffer, the plurality of stored received responses at a protocol layer above a transport layer of the transport layer connection;

means for determining, by the acceleration program, a difference between a rate of consumption of stored received responses from the buffer at the protocol layer and a rate of production of requests transmitted by the client falls below a predetermined threshold;

means for storing, by the acceleration program, and responsive to the determination, the request in a memory element of the client; and

means for determining, by the acceleration program, to transmit the stored request based on a change in one of the rate of consumption or the rate of production by the client.

12. The system of claim 11, wherein the rate of consumption is less than the rate of production.

13. The system of claim 11, comprising means for transmitting, by an appliance, the acceleration program to the client upon a request from the client to establish a connection to the server.

14. The system of claim 13, comprising the client automatically installing and executing the acceleration program upon receipt.

15. The system of claim 11, wherein the acceleration program comprises a filter device driver interfaced to a transport layer of a network stack of the client.

16. The system of claim 11, comprising means for compressing, by the acceleration program, the request stored in the memory element.

17. The system of claim 11, comprising means for providing, by the acceleration program, a pool of one or more transport layer connections for accessing the server by the application on the client.

18. The system of claim 11, comprising means for multiplexing, by the acceleration program, requests from a plurality of applications on the client via the transport layer connection.

19. The system of claim 11, wherein the client executes the acceleration program transparently to one of a network layer, a session layer, or the application layer of a network stack of the client.

20. The system of claim 11, wherein the client executes the acceleration program transparently to one of the application or the server.

21. A method for managing on a client a difference between a rate of processing responses received from a server and a rate of production of requests transmitted to the server, the method comprising:

intercepting, by an acceleration program on the client, a request by an application to access a server, the acceleration program communicating with the server on behalf of the application via a transport layer connection;

receiving, by the acceleration program via the transport layer connection, a plurality of responses from the server;

providing, by the acceleration program, the plurality of responses to an application via an application layer protocol;

consuming, by the application, the plurality of responses;

determining, by the acceleration program, a difference between a rate of consumption of responses by the application via the application layer protocol and a rate of production of requests transmitted by the client falls below a predetermined threshold; and

buffering, by the acceleration program, and responsive to the determination, the request;

determining, by the acceleration program, the difference between the rate of consumption of responses and the rate of production of requests transmitted by the client has risen above a predetermined threshold; and

transmitting, by the acceleration program, the buffered request.

22. A method for managing on a client a difference between a rate of consumption of responses received from a server and a rate of production of requests transmitted to the server, the method comprising:

intercepting, by an acceleration program on the client, a request by an application to access a server, the acceleration program communicating with the server on behalf of the application via a transport layer connection;

receiving, by the acceleration program via the transport layer connection, a plurality of responses from the server;

processing, by the client, the plurality of responses at a protocol layer above a transport layer of the transport layer connection;

determining, by the acceleration program, a difference between a rate of processing of responses at the protocol layer and a rate of production of requests transmitted by the client falls below a predetermined threshold;

storing, by the acceleration program, and responsive to the determination, the request in a memory element of the client; and

determining, by the acceleration program, the difference between the rate of processing of responses and the rate of production of requests transmitted by the client has risen above the predetermined threshold; and

transmitting, by the acceleration program, the stored request.