Moving carrier signal transmission method and device thereof

• US 8,933,792 B2
• Filed: 02/08/2013
• Issued: 01/13/2015
• Est. Priority Date: 10/01/2012
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Ho, Ping-Fan, Tsai, Ming-Fong, Cheng, Ming-Hsuan, Chen, Jyh-Cheng
• Primary Examiner(s): La, Anh V
• Application Number:
  US13/762,977
• Publication Number:
  US 20140091911A1
• Time in Patent Office: 704 Days
• Field of Search: 340/10.4, 340/10.42, 340/425.5, 340/435, 340/436, 340/438, 340/901, 340/902, 340/903, 180/167, 180/168, 701/117, 701/301
• US Class Current: 340/10.42
• CPC Class Codes: G06K 7/01 Details
• CPC Class Codes: G08G 1/017 identifying vehicles G08G1/015, G08G1/054 take precedence
• CPC Class Codes: G08G 1/093 Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
• CPC Class Codes: G08G 1/162 event-triggered
• CPC Class Codes: G08G 1/163 involving continuous checking
• CPC Class Codes: G08G 1/166 for active traffic, e.g. moving vehicles, pedestrians, bikes

Abstract

A moving carrier signal transmission method and a signal transmission device using the same are provided. A main moving carrier acquires an identification code of an ambient moving carrier. The main moving carrier adds an identification code of the main moving carrier and the identification code of the ambient moving carrier in a data request and then sends out the data request to the ambient moving carrier according to the identification code of the ambient moving carrier. When the ambient moving carrier obtains the data request, the ambient moving carrier adds the identification code of the main moving carrier in a moving carrier list and transmits the moving carrier list to the main moving carrier.

Claims

1. A moving carrier signal transmission method, adapted to detect and record a relative position of a main moving carrier and of at least one ambient moving carrier, comprising:

by the main moving carrier, detecting whether the at least one ambient moving carrier exists;

by the main moving carrier, acquiring an identification code of the at least one ambient moving carrier when the at least one ambient moving carrier exists;

by the main moving carrier, adding an identification code of the main moving carrier and the identification code of the at least one ambient moving carrier in a data request and then transmitting the data request to the at least one ambient moving carrier;

by the at least one ambient moving carrier, adding the identification code of the main moving carrier into a moving carrier list when the at least one ambient moving carrier obtains the data request, and then transmitting the moving carrier list to the main moving carrier; and

sorting the identification codes in the moving carrier list according to the position of the at least one ambient moving carrier and of the main moving carrier.

2. The moving carrier signal transmission method according to claim 1, wherein the step of detecting whether the at least one ambient moving carrier exists comprises:

determining whether the at least one ambient moving carrier is in front of, in back of, in the left side of, or in the right side of the main moving carrier.

3. The moving carrier signal transmission method according to claim 2, wherein when a distance between the at least one ambient moving carrier and the main moving carrier is smaller than or equal to a detectable threshold distance, the main moving carrier acquires the identification code of the at least one ambient moving carrier from the at least one ambient moving carrier.

4. The moving carrier signal transmission method according to claim 1, wherein the step of transmitting the moving carrier list to the main moving carrier comprises:

by the main moving carrier, determining whether an amount of the identification codes in the moving carrier list is greater than a recording threshold value; and

by the main moving carrier, deleting at least one of the identification codes in the moving carrier list according to the order of the identification codes in the moving carrier list when the amount of the identification codes is greater than the recording threshold value.

5. The moving carrier signal transmission method according to claim 1, wherein after the step of transmitting the data request to the at least one ambient moving carrier, the signal transmission method further comprises:

by the main moving carrier, recording an extra identification code of the ambient moving carrier in the moving carrier list when the main moving carrier does not obtain the identification code of the ambient moving carrier in a first predetermined period.

6. The moving carrier signal transmission method according to claim 1, wherein after a second predetermined period or when data in the moving carrier list is changed, the main moving carrier detects the ambient moving carrier again and updates the moving carrier list.

7. The moving carrier signal transmission method according to claim 1, wherein the step of sorting the moving carrier list comprises:

when a specific event happens to the main moving carrier, sending out a specific event broadcast message from at least one first ambient moving carrier;

when a second ambient moving carrier obtains the specific event broadcast message, recording the specific event broadcast message and determining whether the first ambient moving carrier is recorded in the moving carrier list of the second ambient moving carrier;

when the first ambient moving carrier is not recorded in the moving carrier list of the second ambient moving carrier, stopping forwarding the specific event broadcast message from the second ambient moving carrier; and

when the first ambient moving carrier is recorded in the moving carrier list of the second ambient moving carrier, forwarding the specific event broadcast message from the second ambient moving carrier.

8. The moving carrier signal transmission method according to claim 7, wherein the step of obtaining the specific event broadcast message by the second ambient moving carrier comprises:

determining whether a number of transmission times in the specific event broadcast message is greater than a transmission threshold value;

when the number of transmission times is smaller than the transmission threshold value, by the second ambient moving carrier, accumulating the number of transmission times and forwarding the specific event broadcast message; and

when the number of transmission times is greater than or equal to the transmission threshold value, by the second ambient moving carrier, stopping forwarding the specific event broadcast message.

9. The moving carrier signal transmission method according to claim 1, wherein after the step of sorting the moving carrier list, the moving carrier signal transmission method further comprises:

when a specific event happens to the main moving carrier, sending out a specific event broadcast message from the main moving carrier;

when a second ambient moving carrier obtains the specific event broadcast message, recording the specific event broadcast message, and determining whether the main moving carrier is recorded in the moving carrier list of the second ambient moving carrier;

when the main moving carrier is not recorded in the moving carrier list of the second ambient moving carrier, stopping forwarding the specific event broadcast message from the second ambient moving carrier; and

when the main moving carrier is recorded in the moving carrier list of the second ambient moving carrier, forwarding the specific event broadcast message from the second ambient moving carrier.

10. The moving carrier signal transmission method according to claim 9, wherein the step of obtaining the specific event broadcast message by the second ambient moving carrier comprises:

by the second ambient moving carrier, determining whether a number of transmission times in the specific event broadcast message is greater than a transmission threshold value;

when the number of transmission times is smaller than the transmission threshold value, by the second ambient moving carrier, accumulating the number of transmission times and forwarding the specific event broadcast message; and

when the number of transmission times is greater than or equal to the transmission threshold value, by the second ambient moving carrier, stopping forwarding the specific event broadcast message.

11. A moving carrier signal transmission device, for establishing a moving carrier list transmitted between a main moving carrier and an ambient moving carrier, and comprising:

an identification unit, for storing an identification code of the main moving carrier;

a detection unit, for detecting whether the ambient moving carrier is in a detectable threshold distance of the main moving carrier;

a communication unit, for transmitting a data request or the moving carrier list;

a storage unit, for storing the moving carrier list; and

a processing unit, electronically connected to the identification unit, the communication unit and the storage unit;

wherein, when the ambient moving carrier in the detectable threshold distance, the processing unit actuates the communication unit to acquire the identification code from the ambient moving carrier, the processing unit adds the identification codes of the main moving carrier and the ambient moving carrier in the data request and then actuates the communication unit to transmit the data request to the ambient moving carrier according to the identification code of the ambient moving carrier, and the ambient moving carrier adds the identification code of the main moving carrier in the moving carrier list and then transmits the moving carrier list to the main moving carrier.

12. The moving carrier signal transmission device according to claim 11, wherein when the processing unit does not obtain the moving carrier list outputted by the ambient moving carrier, during a first predetermined period, the processing unit records the ambient moving carrier in the moving carrier list.

13. The moving carrier signal transmission device according to claim 11, wherein the detection unit acquires an extra identification code of the ambient moving carrier, which serves as the identification code of the ambient moving carrier, when the communication unit does not acquire the identification code of the ambient moving carrier.

14. A moving carrier signal transmission device, for establishing a moving carrier list transmitted between a main moving carrier and an ambient moving carrier, and comprising:

an identification unit, for storing an identification code;

a detection and communication unit, for detecting whether the ambient moving carrier is in a detectable threshold distance of the main moving carrier, so as to transmit a data request or the moving carrier list to the ambient moving carrier;

a storage unit, for storing the moving carrier list; and

a processing unit, electronically connecting to the identification unit, the detection and communication unit and the storage unit;

wherein, when the ambient moving carrier is in the detectable threshold distance, the processing unit actuates the detection and communication unit to acquire the identification code of the ambient moving carrier from the ambient moving carrier, the processing unit adds the identification codes of the main moving carrier and the ambient moving carrier in the data request, and then actuates the detection and communication unit to transmit the data request to the ambient moving carrier according to the identification code of the ambient moving carrier, and the ambient moving carrier adds the identification code of the main moving carrier in the moving carrier list and then transmits the moving carrier list to the main moving carrier.

15. The moving carrier signal transmission device according to claim 14, wherein the detection and communication unit acquires an extra identification code of the ambient moving carrier, which serves as the identification code of the ambient moving carrier, when the detection and communication unit does not acquire the identification code of the ambient moving carrier.