VEHICLE NETWORK TRANSMISSION METHOD AND TRANSMISSION SYSTEM

• US 20140286325A1
• Filed: 03/19/2014
• Published: 09/25/2014
• Est. Priority Date: 03/20/2013
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: KANG, Po-Chun, SU, Tzu-Hsiang, HSU, Kuo-Huang
• Granted Patent: US 9,729,486 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: H04L 12/1845 broadcast or multicast in a specific location, e.g. geocast protocols for adapting network applications to user terminal location H04L67/52; services specially adapted for wireless communication networks making use of the location of users or terminals H04W4/02
• CPC Class Codes: H04L 51/222 using geographical location information, e.g. messages transmitted or received in proximity of a certain spot or area
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 4/021 Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 4/46 for vehicle-to-vehicle communication [V2V]
• CPC Class Codes: H04W 40/20 based on geographic position or location
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A vehicle network transmission method and a vehicle network transmission system are provided. The vehicle network transmission method comprises the following steps. A first transmission device transmits a data signal to a second transmission device. It is determined whether the second transmission device is located in a target area. If the second transmission device is located in the target area, then a geographic location of the first transmission device is retrieved and a transmission region of the first transmission device is calculated. It is determined whether all of the third transmission devices adjacent to the second transmission device in the target area are located in the transmission region. If all of the third transmission devices adjacent to the second transmission device in the target area are located in the transmission region, then the second transmission device does not continue forwarding the data signal.

Claims

1. A vehicle network transmission method, comprising the steps of:

a first transmission device transmitting a data signal to a second transmission device;

determining whether the second transmission device is located in a target area;

retrieving a geographic location of the first transmission device if the second transmission device is located in the target area;

calculating a transmission region of the first transmission device;

determining whether all of at least one third transmission device(s) adjacent to the second transmission device in the target area are located in the transmission region; and

the second transmission device does not continue forwarding the data signal if all of the at least one third transmission device(s) adjacent to the second transmission device in the target area are located in the transmission region.

2. The transmission method according to claim 1, further comprising the steps of:

determining whether the data signal comes from the target area if the second transmission device is not located in the target area; and

the second transmission device does not continue forwarding the data signal if the data signal comes from the target area.

3. The transmission method according to claim 2, wherein the step of determining whether the data signal comes from the target area further comprises:

performing geographic comparison according to a location of the first transmission device and a range of the target area, and determining whether the first transmission device is located in the target area, wherein the data signal comes from the target area if the first transmission device is located in the target area.

4. The transmission method according to claim 2, wherein the step of determining whether the data signal comes from the target area comprises:

determining whether a transmission mode of the data signal is a broadcast transmission mode or a unicast transmission mode;

the data signal comes from the target area if the transmission method of the data signal is the broadcast transmission mode; and

the data signal does not come from the target area if the transmission method of the data signal is the unicast transmission mode.

5. The transmission method according to claim 1, wherein in the step of retrieving the geographic location of the first transmission device, the geographic location of the first transmission device together with the data signal are transmitted to the second transmission device.

6. The transmission method according to claim 5, wherein in the step of retrieving the geographic location of the first transmission device, the data signal is periodically transmitted to the second transmission device, the geographic location of the first transmission device is stored in a table, and the second transmission device obtains the geographic location of the first transmission device by looking up the table.

7. The transmission method according to claim 1, wherein in the step of determining whether all of the at least one third transmission device(s) adjacent to the second transmission device in the target area are located in the transmission region, each of the at least one third transmission device periodically transmits another data signal to the second transmission device, and stores a geographic location of each of the at least one third transmission device in a table, and the second transmission device obtains the geographic location of each of the at least one third transmission device by looking up the table.

8. A vehicle network transmission system, comprising:

a first transmission device, which is disposed on a first vehicle and transmits a data signal;

a second transmission device, which is disposed on a second vehicle and receives the data signal; and

at least one third transmission device(s) disposed on a third vehicle and adjacent to the second transmission device, wherein the second transmission device does not continue forwarding the data signal when the second transmission device is located in a target area and the second transmission device adjacent to all of the at least one third transmission device(s) in the target area are located in a transmission region of the first transmission device.

9. The transmission system according to claim 8, wherein the second transmission device does not continue forwarding the data signal when the second transmission device is not located in the target area and the data signal comes from the target area.

10. The transmission system according to claim 9, wherein the second transmission device determines that the data signal comes from the target area upon determining that a location of the first transmission device is in a range of the target area.

11. The transmission system according to claim 9, wherein:

the second transmission device further determines that the data signal comes from the target area when a transmission mode of the data signal is a broadcast transmission mode; and

the second transmission device further determines that the data signal does not come from the target area when the transmission mode of the data signal is a unicast transmission mode.

12. The transmission system according to claim 8, wherein the second transmission device retrieves a geographic location of the first transmission device upon determining that the second transmission device is located in the target area, and the geographic location of the first transmission device together with the data signal are transmitted to the second transmission device.

13. The transmission system according to claim 12, wherein the data signal is periodically transmitted to the second transmission device, the second transmission device further stores a geographic location of the first transmission device in a table, and the second transmission device obtains the geographic location of the first transmission device by looking up the table.

14. The transmission system according to claim 8, wherein each of the at least one third transmission device periodically transmits another data signal to the second transmission device, the second transmission device further stores a geographic location of each of the at least one third transmission device in a table, the second transmission device by looking up the table to obtain the geographic location of each of the at least one third transmission device.

15. A transmission device disposed on a vehicle, the transmission device comprising:

a transmission unit receiving a data signal transmitted by a previous transmission device; and

a processing unit, which is coupled to the transmission unit, and controls the transmission unit not to continue forwarding the data signal when the transmission device is located in a target area and all of at least one next transmission devices adjacent to the transmission device in the target area are located in a transmission region of the previous transmission device.

16. The transmission device according to claim 15, wherein the processing unit controls the transmission unit not to continue forwarding the data signal when the transmission device is not located in the target area and the data signal comes from the target area.

17. The transmission device according to claim 16, wherein the processing unit determines that the data signal comes from the target area upon determining that a location of the previous transmission device is located in a range of the target area.

18. The transmission device according to claim 15, wherein:

the processing unit further determines that the data signal comes from the target area when a transmission mode of the data signal is a broadcast transmission mode; and

the processing unit further determines that the data signal does not come from the target area when the transmission mode of the data signal is a unicast transmission mode.

19. The transmission device according to claim 15, wherein the processing unit retrieves a geographic location of the previous transmission device upon determining that the transmission device is located in the target area, and the geographic location of the previous transmission device together with the data signal are transmitted to the transmission device.

20. The transmission device according to claim 19, wherein the data signal is periodically transmitted to the transmission device, the processing unit further stores the geographic location of the previous transmission device in a table, and the processing unit obtains the geographic location of the previous transmission device by looking up the table.

21. The transmission device according to claim 15, wherein each of the at least one next transmission device periodically transmits another data signal to the transmission device, the processing unit further stores a geographic location of the at least one next transmission device in a table, and the processing unit obtains the geographic location of each of the at least one next transmission device by looking up the table.