Methods and media for exchanging data between nodes of disconnected networks

• US 8,626,844 B2
• Filed: 03/26/2008
• Issued: 01/07/2014
• Est. Priority Date: 03/26/2007
• Status: Active Grant

• Current Assignee: Trustees Of Columbia University In The City Of New York (Columbia University)
• Original Assignee: Trustees Of Columbia University In The City Of New York (Columbia University)
• Inventors: Schulzrinne, Henning G., Srinivasan, Suman Ramkumar
• Primary Examiner(s): Ibrahim, Mohamed
• Application Number:
  US12/593,209
• Publication Number:
  US 20100070600A1
• Time in Patent Office: 2,113 Days
• Field of Search: None
• US Class Current: 709/206
• CPC Class Codes: G06F 16/951 Indexing; Web crawling techniques

Abstract

Methods and media for exchanging data between nodes of disconnected networks are provided, including: determining a query type based on whether a query received at a first node includes at least one keyword or at least a portion of a uniform resource identifier; performing a search of a cache based on the query and the query type; converting the query into a formatted query document; storing the formatted query document in a database, if the search of the cache does not yield at least a predetermined number of data items; retrieving the formatted query document from the database at a predetermined interval; multicasting the retrieved formatted query document from the first node to at least a second node; and receiving, at the first node, a formatted response document from the second node, the formatted response document resulting from a search of a cache of the second node.

Claims

1. A method for exchanging data between nodes of disconnected networks, the method comprising:

receiving a query including at least one keyword or at least.a portion of a uniform resource identifier via a user interface of a first node;

determining in the first node a query type based on whether the query includes at least one keyword or at least a portion of a uniform resource identifier;

performing a search of a cache of the first node based on the query and the query type;

converting the query into a formatted query document;

storing the formatted query document in a database of the first node, if the search of the cache does not yield at least a predetermined number of data items;

retrieving the formatted query document from the database of the first node at a predetermined interval;

multicasting the retrieved formatted query document from the. first node to at least a second node;

receiving, at the first node, a formatted response document from the second node, the formatted response document resulting from a search of a cache of the second node;

converting the formatted response document into a display document; and

presenting the displaying document to the user via the user interface of the first node.

2. The method of claim 1, wherein the predetermined number of data items is set to at least ten if the query is a keyword-type query and is set to one if the query is uniform resource identifier-type query.

3. The method of claim 1, wherein the predetermined interval is at least one of random and periodic.

4. The method of claim 1, wherein both the formatted query document and the formatted response document are XML documents.

5. The method of claim 1, wherein the formatted response document includes at least one of an embedded text file, music file, webpage, and video file.

6. The method of claim 1, further comprising:

receiving, at the first node, a formatted query document from the second node; and

sending a formatted response document to the second node based on a search of the cache of the first node based on the formatted query document received from the second node.

7. The method of claim 1, further comprising:

receiving an e-mail via a user interface of the first node; and

multicasting the e-mail to at least the second node with a request that the second node deliver the e-mail.

8. The method of claim 1, wherein the first node is at least one of a personal digital assistant, laptop computer, and portable telephone.

9. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a processor, cause the processor to perform a method for exchanging data between nodes of disconnected networks, comprising:

receiving a query including at least one keyword or at least a portion of a uniform resource identifier via a user interface of a first node;

determining in the first node a query type based on whether the query includes at least one keyword or at least a portion of a uniform resource identifier;

performing a search of a cache of the first node based on the query and the query type;

converting the query into a formatted query document;

storing the formatted query document in a database of the first node, if the search of the cache does not yield at least a predetermined number of data items;

retrieving the formatted query document from the database of the first node at a predetermined interval;

multicasting the retrieved formatted query document from the first. node to at least a second node;

receiving, at the first node, a formatted response document from the second node, the formatted response document resulting from a search of a cache of the second node;

converting the formatted response document into a display document; and

presenting the displaying document to the user via the user interface of the first node.

10. The non-transitory computer readable medium of claim 9, wherein the predetermined number of data items is set to at least ten if the query is a keyword-type query and is set to one if the query is uniform resource identifier-type query.

11. The non-transitory computer readable medium of claim 9, wherein the predetermined interval is at least one of random and periodic.

12. The non-transitory computer readable medium of claim 9, wherein both the formatted query document and the formatted response document are XML documents.

13. The non-transitory computer readable medium of claim 9, wherein the formatted response document includes at least one of an embedded text file, music file, webpage, and video file.

14. The non-transitory computer readable medium of claim 9, wherein the method. further comprises:

receiving, at the first node, a formatted query document from the second node; and

sending a formatted response document to the second node based on a search of the cache of the first node based on the formatted query document received from the second node.

15. The non-transitory computer readable medium of claim 9, wherein the method further comprises:

receiving an e-mail via a user interface of the first node; and

multicasting the e-mail to at least the second node with a request that the second node deliver the e-mail.

16. The non-transitory computer readable medium of claim 9, wherein the first node is at least one of a personal digital assistant, laptop computer, and portable telephone.