# US 12,118,886 B2 · Communication device and communication method

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- Number: US 12,118,886 B2
- Document ID: US12118886B2
- Status: Granted
- Kind: B2
- Application number: 17/846,785
- Filed: 2022-06-22
- Published: 2022-10-06
- Granted: 2024-10-15
- Earliest claimed: 2019-12-25
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Kosei Nakano; Hiroyuki Motozuka; Masataka Irie; Yao Huang Gaius Wee
- Web page: https://patentgrep.com/patent/US12118886B2

## CPC

- G08G 1/13: the indicator being in the form of a map
- H04W 4/029: Location-based management or tracking services
- G01C 21/3602: {Input other than that of destination using image analysis, e.g. detection of road signs, lanes, buildings, real preceding vehicles using a camera}
- G08G 1/0112: {from the vehicle, e.g. floating car data [FCD]}
- G08G 1/0116: {from roadside infrastructure, e.g. beacons}
- G08G 1/04: using optical or ultrasonic detectors
- G08G 1/0969: having a display in the form of a map
- G09B 29/00: Maps; Plans; Charts; Diagrams, e.g. route diagram (star maps G09B27/04; devices for holding or supporting maps A47B97/02; for computing purposes G06G1/14, G09B1/16; display boards G09F)
- H04W 4/02: Services making use of location information
- H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
- G16Y 10/40: Transportation
- G08G: TRAFFIC CONTROL SYSTEMS (guiding railway traffic, ensuring the safety of railway traffic B61L; arrangement of road signs or traffic signals E01F9/00; radar or analogous systems, sonar systems, lidar systems specially adapted for traffic control G01S13/91, G01S15/88, G01S17/88; {radar or analogous systems, sonar systems, lidar systems specially adapted for anti-collision purposes G01S13/93, G01S15/93, G01S17/93})
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S)
- G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B)
- G16Y: INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]

## Abstract

A communication apparatus mounted on a vehicle includes: a camera that captures a still image used for generating a map; a positioning circuit that positions a captured position of the still image; a control circuit that associates position information indicating the captured position with image data of the still image; and a communication circuit that establishes a radio communication with a roadside unit and transmits the image data by radio to the roadside unit, in which the control circuit rearranges an transmission order of the image data to be transmitted by radio to the roadside unit, based on the position information.

## Claims

### Claim 1

A communication apparatus to be mounted on a vehicle, the communication apparatus comprising:
a camera that captures still images used for generating a map, the still images being captured in a first order;
a positioning circuit that positions captured positions of the still images;
a control circuit that associates position information indicating the captured positions with image data of the still images, arranges the image data on the map based on the position information, divides the map into cells of a grid, selects the cells of the grid one by one according to a predetermined rule, selects one or more still images in each of the selected cells of the grid, and rearranges, using the position information, a transmission order of the still images from the first order to a second order that is an order in which the one or more still images is selected; and
a communication circuit that establishes a radio communication with a roadside unit, and transmits the still images in the transmission order by radio to the roadside unit.

### Claim 2 (depends on 1)

The communication apparatus according to claim 1, wherein
the control circuit selects the cells of the grid in an order of sweeping in a horizontal direction.

### Claim 3 (depends on 1)

The communication apparatus according to claim 1, wherein
the control circuit selects the cells of the grid in an order of sweeping in a vertical direction.

### Claim 4 (depends on 1)

The communication apparatus according to claim 1, wherein
the control circuit selects the cells of the grid in a random order.

### Claim 5 (depends on 1)

The communication apparatus according to claim 1, wherein
the control circuit, after selecting all of the cells of the grid one by one, changes a size of the cells of the grid and selects, one by one, the cells of the grid whose size has been changed.

### Claim 6 (depends on 1)

The communication apparatus according to claim 1, wherein
the control circuit arranges the image data on a distance axis based on the position information;
divides the distance axis into second cells of a grid;
selects the second cells of the grid one by one according to a predetermined rule; and
selects one or more still images in the selected second cells of the grid;
rearranges, using the position information, the transmission order of the still images from the first order to a third order that is an order in which the one or more still images is selected in the selected second cells of the grid.

### Claim 7 (depends on 1)

The communication apparatus according to claim 1, wherein
the control circuit rearranges the transmission order of the still images using a downsampling algorithm.

### Claim 8 (depends on 1)

The communication apparatus according to claim 1, wherein the first order is a time series order.

### Claim 9

A communication method for a communication apparatus to be mounted on a vehicle, the communication method comprising:
capturing still images used for generating a map, the still images being captured in a first order;
positioning captured positions of the still images;
associating position information indicating the captured positions with image data of the still images;
arranging the image data on the map based on the position information;
dividing the map into cells of a grid;
selecting the cells of the grid one by one according to a predetermined rule;
selecting one or more still images in each of the selected cells of the grid;
rearranging, using the position information, a transmission order of the still images from the first order to a second order that is an order in which the one or more still images is selected; and
establishing a radio communication with a roadside unit and transmitting the still images in the transmission order to the roadside unit by radio.

### Claim 10

A communication apparatus to be mounted on a vehicle, the communication apparatus comprising:
a camera that captures a still image used for generating a map;
a positioning circuit that positions a captured position of the still image;
a control circuit that associates position information indicating the captured position with image data of the still image; and
a communication circuit that establishes a radio communication with a roadside unit and transmits the image data by radio to the roadside unit, wherein
the control circuit arranges the image data on map data based on the position information, divides the map data into cells of a grid, selects the cells of the grid one by one according to a predetermined rule, selects one or more pieces of image data in each of the selected cells of the grid, and rearranges a transmission order of the image data to be transmitted by radio to the roadside unit based on the selected one or more pieces of image data.

### Claim 11

A communication apparatus to be mounted on a vehicle, the communication apparatus comprising:
a camera that captures a still image used for generating a map;
a positioning circuit that positions a captured position of the still image;
a control circuit that associates position information indicating the captured position with image data of the still image; and
a communication circuit that establishes a radio communication with a roadside unit and transmits the image data by radio to the roadside unit, wherein
the control circuit arranges the image data on a distance axis based on the position information, divides the distance axis into cells of a grid, selects the cells of the grid one by one according to a predetermined rule, selects one or more pieces of image data in the selected cell of the grid, and rearranges a transmission order of the image data to be transmitted by radio to the roadside unit based on the selected one or more pieces of image data.