VEHICLE CONTROL SYSTEM

• US 20150329081A1
• Filed: 12/12/2013
• Published: 11/19/2015
• Est. Priority Date: 01/16/2013
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: MORITA, Yasuo
• Granted Patent: US 9,725,072 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 25/245 where the antenna reception area plays a role
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04M 1/6075 adapted for handsfree use in a vehicle H04M1/6058 takes precedence; arrangements for holding telephones in a vehicle B60R11/0241
• 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 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks

Abstract

A vehicle control system including a mobile device and an onboard device is provided. The onboard device performs vehicle control when the onboard device receives an authentication code from the mobile device located within an effective area. The mobile device measures reception strength of a vehicle signal from the onboard device and stores strength information indicating characteristics of the reception strength corresponding to a target distance to the onboard device. The mobile device determines whether or not the mobile device is located within an effective area, based on the reception strength and the strength information. The mobile device acquires correction information indicating characteristics of the reception strength corresponding to a mobile state quantity and corrects the strength information based on the mobile state quantity and the correction information.

Claims

1. A vehicle control system comprising

a mobile device carried by a user of a vehicle and an onboard device mounted on the vehicle,

wherein the onboard device performs vehicle control predetermined for the vehicle when wireless communication between the mobile device and the onboard device is performed and the onboard device receives an authentication code unique to the vehicle from the mobile device located within an effective area around a specified vehicular place in the vehicle,

wherein the onboard device includes:

a vehicle-based transmission portion to wirelessly transmit a specified vehicle signal via an antenna provided at the vehicular place when a predetermined vehicle-based trigger is detected;

wherein the mobile device includes;

a mobile-based reception portion to receive the vehicle signal;

a strength measurement portion to measure reception strength of the vehicle signal received by the mobile-based reception portion;

a strength information storage portion to settle a target distance between the mobile device and the vehicular place and store strength information indicating characteristics of the reception strength corresponding to the target distance;

an area determination portion to determine whether or not the mobile device is located within the effective area, based on the reception strength measured by the strength measurement portion and the strength information stored in the strength information storage portion; and

a determination signal transmission portion to wirelessly transmit a specified determination signal when the area determination portion determines that the mobile device is located within the effective area;

wherein the mobile device further includes;

a state detection portion to detect a mobile state quantity as at least one of a tilt amount of the mobile device with reference to a gravity direction and a remaining battery level of the mobile device;

a correction information acquisition portion to acquire correction information indicating characteristics of the reception strength corresponding to the mobile state quantity; and

a strength information correction portion to correct the strength information stored in the strength information storage portion based on

the mobile state quantity detected by the state detection portion at a time of receipt of the vehicle signal and

the correction information acquired by the correction information acquisition portion.

7. The vehicle control system according to claim 1,

wherein the correction information is predetermined for a model of the mobile device.

2. A vehicle control system comprising

a mobile device carried by a user of a vehicle and an onboard device mounted on the vehicle

wherein the onboard device performs vehicle control predetermined for the vehicle when wireless communication between the mobile device and the onboard device is performed and the onboard device receives an authentication code unique to the vehicle from the mobile device located within an effective area around a specified vehicular place in the vehicle,

wherein the mobile device includes:

a mobile-based transmission portion to wirelessly transmit a specified mobile signal when a predetermined mobile-based trigger is detected;

wherein the onboard device includes;

a vehicle-based reception portion to receive the mobile signal;

a strength measurement portion to measure reception strength of the mobile signal received by the vehicle-based reception portion;

a strength information storage portion to settle a target distance between the mobile device and the vehicular place and store strength information indicating characteristics of the reception strength corresponding to the target distance; and

an area determination portion to determine whether or not the mobile device is located within the effective area, based on the reception strength measured by the strength measurement portion and the strength information stored in the strength information storage portion;

wherein the mobile device further includes;

a state detection portion to detect a mobile state quantity as at least one of a tilt amount of the mobile device with reference to a gravity direction and a remaining battery level of the mobile device; and

a state information provision portion to provide the mobile signal with state information indicating the mobile state quantity detected by the state detection portion at a time of transmission of the mobile signal;

wherein the onboard device further includes;

a correction information acquisition portion to acquire correction information indicating characteristics of the reception strength corresponding to the mobile state quantity; and

a strength information correction portion to correct the strength information stored in the strength information storage portion based on the state information received along with the mobile signal via the vehicle-based reception portion and the correction information acquired by the correction information acquisition portion.

6. The vehicle control system according to claim 2,

wherein the mobile device further includes:

a correction information storage portion to store the correction information; and

a correction information provision portion to provide the mobile signal with the correction information stored in the correction information storage portion; and

wherein the correction information acquisition portion receives the correction information along with the mobile signal via the vehicle-based reception portion.

3. A vehicle control system comprising

a mobile device carried by a user of a vehicle and an onboard device mounted on the vehicle,

wherein the onboard device performs vehicle control predetermined for the vehicle when wireless communication between the mobile device and the onboard device is performed and the onboard device receives an authentication code unique to the vehicle from the mobile device located within an effective area around a specified vehicular place in the vehicle,

wherein the mobile device includes:

a mobile-based transmission portion to wirelessly transmit a specified mobile signal when a predetermined mobile-based trigger is detected;

wherein the onboard device includes;

a vehicle-based reception portion to receive the mobile signal;

a strength measurement portion to measure reception strength of the mobile signal received by the vehicle-based reception portion;

a strength information storage portion to settle a target distance between the mobile device and the vehicular place and store strength information indicating characteristics of the reception strength corresponding to the target distance; and

an area determination portion to determine whether or not the mobile device is located within the effective area, based on the reception strength measured by the strength measurement portion and the strength information stored in the strength information storage portion;

wherein the mobile device further includes;

a state detection portion to detect a tilt amount of the mobile device with reference to a gravity direction;

a correction information acquisition portion to acquire correction information indicating characteristics of the reception strength corresponding to the tilt amount; and

a transmission output adjustment portion to adjust transmission output of the mobile signal so as to correct the strength information stored in the strength information storage portion based on

the tilt amount detected by the state detection portion at a time of transmission of the mobile signal and

the correction information acquired by the correction information acquisition portion.

4. A vehicle control system comprising

a mobile device carried by a user of a vehicle and an onboard device mounted on the vehicle,

wherein the onboard device performs vehicle control predetermined for the vehicle when wireless communication between the mobile device and the onboard device is performed and the onboard device receives an authentication code unique to the vehicle from the mobile device located within an effective area around a specified vehicular place in the vehicle,

wherein the onboard device includes:

a vehicle-based reception portion to receive a specified mobile signal; and

a vehicle-based transmission portion to wirelessly transmit a specified vehicle signal via an antenna provided at the vehicular place when the vehicle-based reception portion receives the mobile signal;

wherein the mobile device includes;

a mobile-based transmission portion to wirelessly transmit the mobile signal when a predetermined mobile-based trigger is detected;

a mobile-based reception portion to receive the vehicle signal;

a strength measurement portion to measure reception strength of the vehicle signal received by the mobile-based reception portion;

a strength information storage portion to settle a target distance between the mobile device and the vehicular place and store strength information indicating characteristics of the reception strength corresponding to the target distance;

an area determination portion to determine whether or not the mobile device is located within the effective area, based on the reception strength measured by the strength measurement portion and the strength information stored in the strength information storage portion; and

a determination signal transmission portion to wirelessly transmit a specified determination signal when the area determination portion determines that the mobile device is located within the effective area;

wherein the mobile device further includes;

a state detection portion to detect a remaining battery level of the mobile device; and

a state information provision portion to provide the mobile signal with state information indicating the remaining battery level detected by the state detection portion at a time of transmission of the mobile signal;

wherein the onboard device further includes;

a correction information acquisition portion to acquire correction information indicating characteristics of the reception strength corresponding to the remaining battery level; and

a transmission output adjustment portion to adjust transmission output of the vehicle signal so as to correct the strength information stored in the strength information storage portion based on

the state information received along with the mobile signal via the vehicle-based reception portion and

the correction information acquired by the correction information acquisition portion.

5. A vehicle control system comprising

a mobile device carried by a user of a vehicle and an onboard device mounted on the vehicle,

wherein the onboard device performs vehicle control predetermined for the vehicle when wireless communication between the mobile device and the onboard device is performed and the onboard device receives an authentication code unique to the vehicle from the mobile device located within an effective area around a specified vehicular place in the vehicle,

wherein the mobile device includes:

a mobile-based reception portion to receive a specified vehicle signal;

a mobile-based transmission portion to wirelessly transmit a specified mobile signal when the mobile-based reception portion receives the vehicle signal;

a strength measurement portion to measure reception strength of the vehicle signal received by the mobile-based reception portion; and

a reception information provision portion to provide the mobile signal with reception information indicating the reception strength measured by the strength measurement portion;

wherein the onboard device includes;

a vehicle-based transmission portion to wirelessly transmit the vehicle signal when a predetermined vehicle-based trigger is detected;

a vehicle-based reception portion to receive the mobile signal;

a strength information storage portion to settle a target distance between the mobile device and the vehicular place and store strength information indicating characteristics of the reception strength corresponding to the target distance; and

an area determination portion to determine whether or not the mobile device is located within the effective area, based on the reception information received along with the mobile signal via the vehicle-based reception portion and the strength information stored in the strength information storage portion;

wherein the mobile device further includes;

a state detection portion to detect a mobile state quantity as at least one of a tilt amount of the mobile device with reference to a gravity direction and a remaining battery level of the mobile device;

a correction information acquisition portion to acquire correction information indicating characteristics of the reception strength corresponding to the mobile state quantity; and

a reception information correction portion to correct the reception information attached to the mobile signal by the reception information provision portion based on

the mobile state quantity detected by the state detection portion at a time of receipt of the vehicle signal and

the correction information acquired by the correction information acquisition portion.