WIRELESS COMMUNICATION CONTROL SYSTEM, WIRELESS COMMUNICATION CONTROL APPARATUS, METHOD FOR CONTROLLING WIRELESS COMMUNICATION, METHOD FOR PRODUCING DIRECTIVITY INFORMATION, AND RADIO

• US 20170325072A1
• Filed: 07/26/2017
• Published: 11/09/2017
• Est. Priority Date: 02/13/2015
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: UEKI, Daichi, SAITO, Keisuke, HAYAMA, Kosuke
• Granted Patent: US 10,154,383 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 10/541 Digital intensity or amplitude modulation
• CPC Class Codes: H04B 10/5561 Digital phase modulation
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04B 7/2612 Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity H04B7/2615 - H04B7/2643 take precedence; provision for broadband connection H04Q11/0478
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• CPC Class Codes: H04Q 9/02 Automatically-operated arrangements
• 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 4/026 using orientation information, e.g. compass
• CPC Class Codes: H04W 4/30 Services specially adapted for particular environments, situations or purposes
• CPC Class Codes: H04W 4/38 for collecting sensor information
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]

Abstract

A wireless communication control system includes a first radio having a directional antenna, a second radio, a directivity control unit controlling the directivity of the directional antenna, and a directivity information storage unit storing directivity information relating to a directivity, the directivity information being applied to the directional antenna in relation to wireless communication between the first and second radios in accordance with a plurality of change patterns indicating a temporal change in a received signal intensity. The directivity control unit acquires a temporal change in a received signal intensity during wireless communication between the first and second radios, selects, from among pieces of the directivity information stored in the directivity information storage unit, directivity information corresponding to the change pattern corresponding to the temporal change in the received signal intensity, applies the selected directivity information, and executes wireless communication between the first and second radios.

Claims

1. A wireless communication control system comprising:

a first radio having a directional antenna;

a second radio formed to be capable of performing wireless communication with the first radio;

a directivity information storage unit that stores a plurality of pieces of directivity information relating to a directivity and a change pattern that indicates a temporal change in a received signal intensity in a reception radio in a case where wireless communication is performed with a predetermined directivity, the directivity information being applied to the directional antenna of the first radio in relation to wireless communication between the first radio and the second radio in accordance with a plurality of the change patterns that indicate a temporal change in the received signal intensity in the reception radio;

an acquisition unit that acquires a temporal change in the received signal intensity when wireless communication is performed between the first radio and the second radio via the directional antenna to which the predetermined directivity is applied; and

an execution unit that selects, from among the pieces of directivity information stored in the directivity information storage unit, directivity information corresponding to the change pattern determined based on the temporal change in the received signal intensity acquired by the acquisition unit, applies the selected directivity information, and executes wireless communication between the first radio and the second radio.

2. The wireless communication control system according to claim 1,

wherein the directivity information is information that is set such that in a case where the received signal intensity in a reception radio out of the first radio and the second radio changes in the change pattern, a received signal received by the reception radio has a maximum intensity or is in a predetermined received signal intensity range by applying the directivity information to the directional antenna of the first radio.

3. The wireless communication control system according to claim 1,

wherein the second radio is disposed on a driving device whose driving is controlled in accordance with a plurality of predetermined driving patterns, and a relative position of the second radio with respect to the first radio changes due to the driving device being moved in accordance with the driving patterns, and

the directivity information is produced in a situation in which the relative positions of the second radio and the first radio change.

4. The wireless communication control system according to claim 1,

wherein positions of the first radio and the second radio do not change relative to each other.

5. The wireless communication control system according to claim 1, comprising:

a plurality of the second radios,

wherein the plurality of second radios are each configured to be capable of alternatively performing communication with the first radio,

the directivity information storage unit stores driving directivity information that corresponds to the plurality of second radios and is applied to the directional antenna of the first radio in relation to wireless communication between the first radio and the plurality of second radios in accordance with the plurality of driving patterns in a state in which driving of one or more driving devices is controlled in accordance with the plurality of predetermined driving patterns, and

the execution unit selects, from among the pieces of directivity information stored in the directivity information storage unit, driving directivity information that corresponds to the driving pattern acquired by the acquisition unit and corresponds to the plurality of second radios, and executes wireless communication between the first radio and the plurality of second radios in accordance with the selected target driving directivity information.

6. The wireless communication control system according to claim 1, comprising:

a plurality of the second radios,

wherein a second radio group including the plurality of second radios is configured to be capable of performing communication with the first radio,

the directivity information storage unit stores driving directivity information that corresponds to the second radio group and is applied to the directional antenna of the first radio in relation to wireless communication between the first radio and the second radio group in accordance with the plurality of driving patterns in a state in which driving of the one or more driving devices is controlled in accordance with the plurality of predetermined driving patterns, and

the execution unit selects, from among the pieces of driving directivity information stored in the directivity information storage unit, target directivity information that corresponds to the driving pattern acquired by the acquisition unit and corresponds to the second radio group, and executes wireless communication between the first radio and the second radio group in accordance with the selected target driving directivity information.

7. The wireless communication control system according to claim 1,

the second radio is a sensor-equipped radio including a sensor that measures a predetermined environmental parameter.

8. The wireless communication control system according to claim 1,

wherein the directional antenna is a phased-array antenna.

9. The wireless communication control system according to claim 1,

the execution unit executes wireless communication for determining the change pattern with the predetermined directivity every time wireless communication between the first radio and the second radio is executed with a directivity that is based on the selected directivity information for a predetermined period.

10. A radio comprising:

a directional antenna for performing wireless communication with a partner communication device;

a directivity information storage unit that stores a plurality of pieces of directivity information relating to a directivity and a change pattern that indicates a temporal change in a received signal intensity in a reception radio in a case where wireless communication is performed with a predetermined directivity, the directivity information being applied to the directional antenna in relation to wireless communication with the partner communication device in accordance with a plurality of the change patterns that indicate a temporal change in the received signal intensity in the reception radio;

an acquisition unit that acquires a temporal change in the received signal intensity when wireless communication is performed with the partner communication device via the directional antenna to which the predetermined directivity is applied; and

an execution unit that selects, from among the pieces of directivity information stored in the directivity information storage unit, directivity information corresponding to the change pattern determined based on the temporal change in the received signal intensity acquired by the acquisition unit, applies the selected directivity information, and executes wireless communication with the partner communication device.

11. A wireless communication control apparatus that controls wireless communication performed by a first radio configured to be capable of performing wireless communication with a second radio via a directional antenna in a predetermined environment in which driving of one or more driving devices is controlled in accordance with a plurality of predetermined driving patterns, the wireless communication control apparatus comprising:

a directivity information storage unit that stores a plurality of pieces of directivity information relating to a directivity and a change pattern that indicates a temporal change in a received signal intensity in a reception radio in a case where wireless communication is performed with a predetermined directivity, the directivity information being applied to the directional antenna of the first radio in relation to wireless communication between the first radio and the second radio in accordance with a plurality of the change patterns that indicate a temporal change in the received signal intensity in the reception radio;

an acquisition unit that acquires a temporal change in the received signal intensity when wireless communication is performed between the first radio and the second radio via the directional antenna to which the predetermined directivity is applied; and

an execution unit that selects, from among the pieces of directivity information stored in the directivity information storage unit, directivity information corresponding to the change pattern determined based on the temporal change in the received signal intensity acquired by the acquisition unit, applies the selected directivity information, and executes wireless communication between the first radio and the second radio.

12. A method for controlling wireless communication that controls wireless communication performed by a first radio configured to be capable of performing wireless communication with a second radio via a directional antenna in a predetermined environment in which driving of one or more driving devices is controlled in accordance with a plurality of predetermined driving patterns, the method comprising:

acquiring a temporal change in a received signal intensity when wireless communication is performed between the first radio and the second radio via the directional antenna to which a predetermined directivity is applied;

selecting, from a directivity information storage unit that stores a plurality of pieces of directivity information relating to a directivity and a change pattern that indicates a temporal change in a received signal intensity in a reception radio in a case where wireless communication is performed with the predetermined directivity, the directivity information being applied to the directional antenna of the first radio in relation to wireless communication between the first radio and the second radio in accordance with a plurality of the change patterns that indicate a temporal change in the received signal intensity in the reception radio, directivity information that corresponds to the change pattern that was determined based on the acquired temporal change in the received signal intensity; and

applying the selected directivity information and executing wireless communication between the first radio and the second radio.

13. A directivity information production method for producing directivity information that is applied to a directional antenna in wireless communication performed by a first radio configured to be capable of performing wireless communication with a second radio via the directional antenna in a predetermined environment in which driving of one or more driving devices is controlled in accordance with a plurality of predetermined driving patterns, the method comprising:

transmitting test radio waves from a first transmission radio to a reception radio out of the first radio and the second radio in a state in which driving of the one or more driving devices is controlled in accordance with the plurality of driving patterns;

measuring a change in a received signal intensity of the test radio waves when the test radio waves transmitted from the first transmission radio are received by the reception radio, and acquiring a change pattern in the received signal intensity corresponding to the driving pattern;

transmitting test radio waves at a plurality of control times that are set in an execution period during which a driving pattern is executed, from a second transmission radio to a reception radio out of the first radio and the second radio, in a state in which driving of the one or more driving devices is controlled in accordance with the plurality of driving patterns; and

measuring a received signal intensity of test radio waves when the test radio waves transmitted from the second transmission radio are received by the reception radio, and producing driving directivity information relating to a directivity for each change pattern corresponding to the plurality of driving patterns, the driving directivity information being applied to the directional antenna of the first radio in relation to wireless communication between the first radio and the second radio in a state in which driving of the one or more driving devices is controlled in accordance with the plurality of driving patterns such that the received signal has a maximum intensity or is in a predetermined received signal intensity range.