SCALABLE DISRUPTIVE-RESISTANT COMMUNICATION METHOD

• US 20100232404A1
• Filed: 03/13/2009
• Published: 09/16/2010
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson), Toyota Infotechnology Center USA, Inc.
• Original Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson)
• Inventors: Chennikara-Varghese, Jasmine, Vuyyuru, Rama, Chen, Wai, Onishi, Ryokichi
• Granted Patent: US 8,295,257 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: G08G 1/091 Traffic information broadcasting broadcasting communication H04H
• CPC Class Codes: G08G 1/094 Hardware aspects; Signal processing or signal properties, e.g. frequency bands
• CPC Class Codes: G08G 1/22 Platooning, i.e. convoy of communicating vehicles
• CPC Class Codes: H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]
• CPC Class Codes: H04W 28/0226 based on location or mobility handoff or reselection H04W36/00; mobile application services making use of the location of users or terminals H04W4/02
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 4/44 for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]

Abstract

A method for transmitting data in vehicular network comprising determining a communication window between at least two nodes, grouping a plurality of fragments of content together into an aggregate fragment block, forwarding the aggregate fragment block to a target node and assembling the plurality of fragments into the content. The content is divided into the plurality of fragments. A fragment signature is generated for the fragments that contain fragment index information regarding each fragment. Each fragment is unambiguously identified by its signature. A number of fragments grouped into the aggregate fragment block is dependent on the communication window.

Claims

1. A method for transmitting data in vehicular network comprising the steps of:

determining a communication window between at least two nodes;

grouping a plurality of fragments of content together into an aggregate fragment block;

forwarding the aggregate fragment block to a target node; and

assembling the plurality of fragments into the content.

2. The method for transmitting data according to claim 1, further comprising a step of receiving a request for the content, the request including a fragment signature, the target node'"'"'s current position, a direction of motion and speed of the target node.

3. The method for transmitting data according to claim 1, wherein fragment size of a fragment is variable based upon an average communication window and bandwidth of wireless network.

4. The method for transmitting data according to claim 1, wherein a number of fragments grouped into the aggregate fragment block depends on the communication window.

5. The method for transmitting data according to claim 1, further comprising the step of determining a predicted trajectory of the target node.

6. The method for transmitting data according to claim 5, wherein the predicted trajectory of the target node is inferred from a location of each road-side unit (RSU) in radio communication with the target node.

7. The method for transmitting data according to claim 1, wherein said communication window is a communication time for transmission between a nearby node and the target node, said communication window is calculated using a speed of a data link, a radio communication range, and a direction of motion and speed of the target node and the nearby node.

8. The method for transmitting data according to claim 1, further comprising the steps of:

dividing the content into the plurality of fragments; and

generating a fragment signature that contains fragment index information regarding each fragment, where each fragment is unambiguously identified by its signature.

9. The method for transmitting data according to claim 8, further comprising the step of storing the fragment index information in memory.

10. The method for transmitting data according to claim 1, farther comprising the steps of:

verifying an authenticity of each of the forwarded fragments; and

storing each of the forwarded fragments, based upon the verification, where each of the received fragments is identified by a signature.

11. The method for transmitting data according to claim 10, further comprising the step of determining local storage lifespan for each fragment.

12. The method for transmitting data according to claim 10, further comprising the step of assigning a fragment trajectory for each fragment.

13. The method for transmitting data according to claim 1, wherein said grouping is based upon a priority of each fragment.

14. A method for transmitting data in a mobile ad-hoc network comprising the steps of:

dividing data into fragments;

creating a fragment signature containing a fragment index;

determining a window of communication based upon an allowed communication time between two nodes;

grouping the fragments into aggregate fragment blocks, each having a block size determined by the window of communication; and

transmitting the aggregate fragment blocks.

15. The method for transmitting data according to claim 14, further comprising the step of transmitting the fragment signature.

16. The method for transmitting data according to claim 15, further comprising the step of receiving a request for a fragment listed in the fragment signature.