Reducing received data in a V2X network based on received signal strength

• US 9,882,791 B2
• Filed: 08/22/2014
• Issued: 01/30/2018
• Est. Priority Date: 08/22/2013
• Status: Active Grant

• Current Assignee: Continental Teves AG & Co. OHG (Continental AG)
• Original Assignee: Continental Teves AG & Co. OHG (Continental AG)
• Inventors: Grotendorst, Thomas, Menzel, Marc, Scherping, Richard, Sthlin, Ulrich
• Primary Examiner(s): Anwar, Mohammad
• Assistant Examiner(s): Brockman, Angel
• Application Number:
  US14/911,801
• Publication Number:
  US 20160197797A1
• Time in Patent Office: 1,257 Days
• Field of Search: 370465
• 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 1/09675 where a selection from the received information takes place in the vehicle
• CPC Class Codes: G08G 1/096791 where the origin of the information is another vehicle
• 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
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04L 43/028 by filtering
• CPC Class Codes: H04L 47/27 Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
• 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: H04L 67/5651 Reducing the amount or size of exchanged application data
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A method for filtering a transmission signal transmitted in a vehicular ad hoc network, the signal carrying at least position data of participants in data packets. The method includes the following steps: receiving the transmission signal; filtering the data packets from the transmission signal based on a receive filter having a predetermined receive filter specification for demodulating the data packets from the transmission signal, and an additional predetermined condition; and distributing the filtered data packets to a data processing unit superordinate to the receive filter.

Claims

1. A method for filtering a transmission signal transmitted in a vehicular ad hoc network, which signal carries in data packets at least position data about participants, the method comprising:

receiving a transmission signal;

filtering the data packets from the transmission signal on the basis of a receive filter that has a predetermined receive filter specification for demodulating the data packets from the transmission signal and an additional predetermined condition; and

outputting the filtered data packets to a data processing unit at a higher level than the receive filter,

wherein the predetermined condition comprises a minimum signal strength that the transmission signal must possess at the position of a specific data packet, and

wherein the minimum signal strength is dependent on a processing load of the receive filter and/or of the data processing unit.

2. The method as claimed in claim 1, wherein the minimum signal strength depends on at least one normalized value for the transmission signal in a predetermined time window.

3. The method as claimed in claim 2, wherein the minimum signal strength is selected such that in the predetermined time window, a number of data packets that are transmitted by the transmission signal in the time window with the highest signal strengths are selected from the transmission signal.

4. The method as claimed in claim 2, wherein the data packets are filtered first on the basis of the minimum signal strength, which is dependent on the processing load, and then on the basis of an additional minimum signal strength, which is referred to the normalized value.

5. The method as claimed in claim 4, wherein the additional minimum signal strength is greater than the minimum signal strength.

6. The method as claimed in claim 2, wherein the data packets are filtered first on the basis of the minimum signal strength, which is dependent on the processing load, and then on the basis of an additional minimum signal strength, which is referred to the normalized value.

7. The method as claimed in claim 1, wherein the value of the minimum signal strength has an absolute maximum.

8. A filter device for implementing a method as claimed in claim 1.

9. The method as claimed in claim 1, wherein the minimum signal strength depends on at least one normalized value for the transmission signal in a predetermined time window.

10. A receiver for a vehicle for the purpose of receiving messages packaged in data packets using a transmission signal in a vehicular ad hoc network comprises:

an antenna for receiving the transmission signal;

a filter device filtering the data packets from the transmission signal on the basis of a predetermined filter specification for demodulating the data packets from the transmission signal and an additional predetermined condition, and outputting the filtered data packets to a data processing unit at a higher level than the filter device,

wherein the predetermined condition comprises a minimum signal strength that the transmission signal must possess at the position of a specific data packet, and

wherein the minimum signal strength is dependent on a processing load of the receive filter and/or of the data processing unit; and

a display device for extracting the messages from the filtered data packets.