System for recovering from disruption of a data transfer

• US 6,396,805 B2
• Filed: 12/30/1997
• Issued: 05/28/2002
• Est. Priority Date: 03/25/1997
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Romrell, David Alfred
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): NGUYEN, BRIAN D
• Application Number:
  US09/000,636
• Publication Number:
  US 20010002900A1
• Time in Patent Office: 1,610 Days
• Field of Search: 370/216,218,229,230,231,352,235,236,400,241,401,242 395/200.33,200.68,200.61 709/200,203,224,223,217
• US Class Current: 370/216
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/1014 based on the content of a request
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06

Abstract

A system for transparent recovery from a communications disruption during transmission of a data stream from a source computer to a destination computer is implemented in a method including the steps of determining a portion of the data stream that was successfully received by the destination computer and resuming the transmission from a point in the data stream immediately after the successfully received portion.

Claims

1. A system for recovering from disruption of a transmission of a data stream from a network server to a client device, said system comprising:

a proxy device arranged between the client device and the network server, the proxy device being configured to receive all traffic between the client device and the network server;

a first executable module coupled to the client device;

a second executable module coupled to the proxy device, said first executable module and said second executable module being in communication with one another;

said first executable module comprising instructions for selectively disrupting transmission of a data stream from said network server to said client device in response to a user request and for automatically resuming said transmission at a user-selected later time, said instructions for automatically resuming said transmission including instructions for generating a request to said second executable module to resume transmission of the data stream from said network server to said client device at the user-selected later time, wherein said request includes an indicator corresponding to a portion of the data stream that was previously received by said client device; and

said second executable module comprising instructions for determining the portion of the data stream that was previously received by said client device, selectively retrieving some or all of a remaining portion of the data stream from the network server; and

resuming transmission of the data stream from the proxy device to the client device beginning from a point in said data stream immediately following said previously received portion.

2. The system of claim 1, wherein the client device includes a browser, said first executable module comprising a component of said browser.

3. The system of claim 1, wherein the client device includes a browser, said first executable module being coupled to said browser.

4. The system of claim 3, wherein said first executable module further comprises a local proxy.

5. The system of claim 1, wherein said first executable module further comprises instructions for enabling a user of said client device to indicate the later time for resuming said transmission.

6. The system of claim 5, wherein said instructions for enabling the user to indicate the later time compromise instructions for presenting the user with a dialog box.

7. The system of claim 1, wherein said first executable module further comprises instructions for enabling a user of said client device to initiate said resumption of the transmission on demand.