Interception method and system for compensating disadvantageous characteristics of a communication protocol

• US 7,139,822 B2
• Filed: 05/15/2001
• Issued: 11/21/2006
• Est. Priority Date: 07/07/2000
• Status: Expired due to Fees

• Current Assignee: Kyndryl Incorporated (Kyndryl Holdings, Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Sabiwalsky, Dirk, Guenther, Ludwig, Petrov, Tzvetan
• Primary Examiner(s): Vaughn, William
• Assistant Examiner(s): LIN, KENNY S
• Application Number:
  US09/855,360
• Publication Number:
  US 20020004834A1
• Time in Patent Office: 2,016 Days
• Field of Search: 709/227, 709/229, 709/201, 370/232, 370/389, 370/410
• US Class Current: 709/224
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/2876 Pairs of inter-processing entities at each side of the network, e.g. split proxies
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data
• 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 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

Means and method of data communication compensating disadvantageous characteristics of a first protocol for data communication between a client-application and a server-application. Communication requests of the client application and the server application adhering to a second protocol are intercepted by an client interceptor and a server interceptor. Besides mapping the second protocol onto the first protocol and back again the interceptors compensate disadvantageous characteristics inherent to the first protocol or arising from the combination of protocols transparently.

Claims

1. A data communication method that compensates for disadvantageous characteristics of a first protocol that is used to communicate data between a client application and a server application, wherein the client application and the server application employ a second protocol that is mapped onto the first protocol, said method comprising the acts of:

intercepting, by a client interceptor acting on behalf of a server application, a second-protocol data communication request from a client application;

mapping, by the client interceptor, the second-protocol data communication request onto the first protocol;

sending the communication request to a server interceptor using the first protocol;

compensating a disadvantageous characteristic of the first protocol, said compensating comprising ascertaining that a condition exists and eliminating the condition in response to said ascertaining, said condition being a connection condition or a transmission capacity condition;

mapping, by the server interceptor, the communication request back onto the second protocol to recreate substantially the second-protocol data communication request;

delivering the second-protocol data communication request to the server application; and

after said intercepting the communication request and before said sending the communication request to the server interceptor;

adding, by the client interceptor, a client connection identifier to the communication request.

2. The method of claim 1, wherein the ascertaining comprises determining loss of a connection, and wherein the eliminating comprises re-establishing the connection.

3. The method of claim 1, wherein the ascertaining comprises detecting that a connection is idle, and wherein the eliminating comprises dropping the connection and re-establishing the connection when a new communication request is intercepted.

4. The method of claim 1, wherein the ascertaining comprises determining that transmission capacity is insufficient to process the data communication request within a predetermined interval of time, and wherein the eliminating comprises establishing a parallel connection to increase transmission capacity.

5. The method of claim 1, wherein the second protocol is connection oriented, and wherein the client interceptor and the server interceptor intercept a plurality of connections between the client application and the client interceptor using the second protocol, and between the server interceptor and the server application using the second protocol.

6. The method of claim 5, wherein the plurality of connections using the second protocol are multiplexed onto a single connection of the first protocol.

7. The method of claim 1, wherein the first protocol is a wireless communication protocol.

8. The method of claim 1, further comprising the act of opening, by the client interceptor, a connection to the server interceptor using the first protocol following the act of intercepting the second-protocol data communication request.

9. The method of claim 1, further comprising the acts of:

opening, by the client interceptor, a connection to the server interceptor using the first protocol following the act of intercepting the second-protocol data communication request; and

receiving, by the client interceptor, an identification of the server application; and

forwarding the identification to an address-resolution server for first-protocol address resolution.

10. The method of claim 1, wherein said compensating further comprises closing idle connections to reduce costs.

11. A data communication system that compensates for disadvantageous characteristics of a first protocol that is used to communicate data between a client application and a server application, wherein the client application and the server application employ a second protocol that is mapped onto the first protocol, said system comprising:

a client interceptor acting on behalf of the server application, said client interceptor adapted to intercept a second-protocol data communication request from the client application, said client interceptor further adapted to map the second-protocol data communication request onto the first protocol;

a server interceptor adapted to map the communication request back onto the second protocol to recreate substantially the second-protocol data communication request;

means for sending the second-protocol data communication request to the server interceptor using the first protocol;

means for compensating a disadvantageous characteristic of the first protocol, said compensating comprising ascertaining that a condition exists and eliminating the condition in response to said ascertaining, said condition being a connection condition or a transmission capacity condition;

means for delivering the second-protocol data communication request to the server application; and

means for adding, by the client interceptor, a client connection identifier to the communication request after said client interceptor has intercepted the communication request and before the communication request has been sent to the server interceptor.

12. The system of claim 11, wherein the ascertaining comprises determining loss of a connection, and wherein the eliminating comprises re-establishing the connection.

13. The system of claim 11, wherein the ascertaining comprises detecting that a connection is idle, and wherein the eliminating comprises dropping the connection, and re-establishing the connection when a new communication request is intercepted.

14. The system of claim 11, wherein the ascertaining comprises the acts of determining that transmission capacity is insufficient to process the data communication request within a predetermined interval of time, and wherein the eliminating comprises establishing a parallel connection to increase transmission capacity.

15. The system of claim 11, wherein the second protocol is connection oriented, and wherein the client interceptor and the server interceptor are adapted to intercept a plurality of connections between the client application and the client interceptor using the second protocol, and between the server interceptor and the server application using the second protocol.

16. The system of claim 15, wherein the plurality of connections using the second protocol are multiplexed onto a single connection of the first protocol.

17. The system of claim 11, wherein the first protocol is a wireless communication protocol.

18. The system of claim 11, further comprising:

means for opening, by the client interceptor, a connection to the server interceptor using the first protocol following intercepting the second-protocol data communication request.

19. The system of claim 18, further comprising:

means for receiving, by the client interceptor, an identification of the server application; and

means for forwarding the identification to an address-resolution server for first-protocol address resolution.

20. The system of claim 11, wherein said means for compensating further comprises means for closing idle connections to reduce costs.

21. A data communication method that compensates for disadvantageous characteristics of a first protocol that is used to communicate data between a client application and a server application, wherein the client application and the server application employ a second protocol that is mapped onto the first protocol, said method comprising the acts of:

intercepting by a client interceptor acting on behalf of a server application, a second-protocol data communication request from a client application;

mapping by the client interceptor, the second-protocol data communication request onto the first protocol;

sending the communication request to a server interceptor using the first protocol;

compensating a disadvantageous characteristic of the first protocol, said compensating comprising ascertaining that a condition exists and eliminating the condition in response to said ascertaining, said condition being a connection condition or a transmission capacity condition;

mapping, by the server interceptor, the communication request back onto the second protocol to recreate substantially the second-protocol data communication request; and

delivering the second-protocol data communication request to the server application,

wherein the client application resides on a computing device, wherein the computing device comprises a communication platform client that includes a session layer, a reliability layer, and a network layer, and wherein in response to the network layer attempting to send data with no physical connection in place for sending the data said method comprises;

repeatedly attempting to set up a new physical connection until either the new physical connection is set up or until a logical connection is closed by the session layer in response to the reliability layer having detected a session timeout.

22. A data communication system that compensates for disadvantageous characteristics of a first protocol that is used to communicate data between a client application and a server application, wherein the client application and the server application employ a second protocol that is mapped onto the first protocol, said system comprising:

a client interceptor acting on behalf of the server application, said client interceptor adapted to intercept a second-protocol data communication request from the client application, said client interceptor further adapted to map the second-protocol data communication request onto the first protocol;

a server interceptor adapted to map the communication request back onto the second protocol to recreate substantially the second-protocol data communication request;

means for sending the second-protocol data communication request to the server interceptor using the first protocol;

means for compensating a disadvantageous characteristic of the first protocol, said compensating comprising ascertaining that a condition exists and eliminating the condition in response to said ascertaining, said condition being a connection condition or a transmission capacity condition; and

means for delivering the second-protocol data communication request to the server application,

wherein the client application resides on a computing device, wherein the computing device comprises a communication platform client that includes a session layer, a reliability layer, and a network layer, wherein in response to the network layer attempting to send data with no physical connection in place for sending the data said system comprises;

means for repeatedly attempting to set up a new physical connection until either the new physical connection is set up or until a logical connection is closed by the session layer in response to the reliability layer having detected a session timeout.