Control apparatus, control method and storage medium

• US 10,015,803 B2
• Filed: 12/10/2015
• Issued: 07/03/2018
• Est. Priority Date: 01/06/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Horio, Daisuke
• Primary Examiner(s): Adhami, Mohammad
• Assistant Examiner(s): Kumar, Shailendra
• Application Number:
  US14/965,287
• Publication Number:
  US 20160198483A1
• Time in Patent Office: 936 Days
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A control apparatus that controls the communication period length of a signal transmitted by radio obtains the first radio quality regarding the first signal and the second radio quality regarding the second signal when spatially separating and transmitting the first signal and the second signal in parallel. The apparatus determines whether the first radio quality satisfies the first level for transmitting the first signal in the first communication period length and whether the second radio quality satisfies the second level for transmitting the second signal in the second communication period length. In a case where the first radio quality does not satisfy the first level or the second radio quality does not satisfy the second level, the apparatus extends the communication period length of a signal having a smaller communication period length.

Claims

1. A control apparatus comprising:

at least one processor; and

at least one memory storing code to be executed by the at least one processor, wherein the at least one processor executes the code to function as;

an obtaining unit configured to obtain a first radio quality regarding a first signal and a second radio quality regarding a second signal when spatially separating and transmitting the first signal of a first communication period length and the second signal of a second communication period length, wherein the first radio quality and the second radio quality are obtained in parallel;

a determination unit configured to determine whether the first radio quality satisfies a first level for transmitting the first signal in the first communication period length and whether the second radio quality satisfies a second level for transmitting the second signal in the second communication period length;

a comparison unit configured to compare the first communication period length with the second communication period length to obtain a difference between the first communication period length and the second communication period length; and

a control unit configured to, in a case where at least one of the first radio quality or the second radio quality does not satisfy the corresponding first level or the second level and the difference between the first communication period length and the second communication period length is not smaller than a predetermined length, perform control of extending the communication period length of a signal having a smaller communication period length out of the first signal and the second signal by lowering a coding rate of the signal having the smaller communication period length so as to transmit, in the extended communication period length, the same amount of data as data of the signal having the smaller communication period length in the communication period length before extension.

2. The apparatus according to claim 1, wherein when the second communication period length is smaller than the first communication period length and the second radio quality does not satisfy the second level, the control unit is further configured to perform control of selecting a coding rate corresponding to a third level satisfied by the second radio quality, and extending the communication period length of the second signal using the selected coding rate.

3. The apparatus according to claim 1, wherein the control unit is further configured to perform control of copying at least part of data included in the signal having the smaller communication period length, and extending the communication period length of the signal having the smaller communication period length.

4. The apparatus according to claim 1, wherein when the second communication period length is smaller than the first communication period length and the first radio quality does not satisfy the first level, the control unit is further configured to perform control of extending the communication period length of the second signal and lowering power of the second signal so as to make the first radio quality satisfy the first level.

5. The apparatus according to claim 1, wherein the control unit is further configured to perform control of extending the communication period length of the signal having the smaller communication period length in a range of not exceeding the communication period length of the signal having a larger communication period length.

6. The apparatus according to claim 1, wherein the control unit is further configured to perform control of extending the communication period length of the signal having the smaller communication period length in a range of smaller than a total length of the communication period length of the signal having the larger communication period length and the communication period length of the signal having the smaller communication period length.

7. The apparatus according to claim 6, wherein the control unit is further configured to perform control of extending the communication period length of the signal having the larger communication period length in a range of smaller than the total length.

8. The apparatus according to claim 1, wherein the at least one processor further executes the code to function as a transmission unit configured to transmit at least one of the first signal and the second signal.

9. The apparatus according to claim 1, wherein the control unit includes a notification unit configured to notify a transmission device configured to transmit at least one of the first signal and the second signal, of information for controlling the signal to be transmitted.

10. The apparatus according to claim 1, wherein the obtaining unit includes a measurement unit configured to measure at least one of the first radio quality and the second radio quality.

11. The apparatus according to claim 1, wherein the obtaining unit is further configured to obtain radio quality information about a signal to be received, from a reception device configured to receive at least one of the first radio quality and the second radio quality.

12. The apparatus according to claim 1, wherein the first communication period length is a communication period length taken to transmit data regarding the first signal when an interference from the second signal does not exist, and the second communication period length is a communication period length taken to transmit data regarding the second signal when an interference from the first signal does not exist.

13. A control apparatus comprising:

at least one processor; and

at least one memory storing code to be executed by the at least one processor, wherein the at least one processor executes the code to function as;

an obtaining unit configured to obtain a first radio quality regarding a first signal and a second radio quality regarding a second signal when spatially separating and transmitting the first signal and the second signal, wherein the first radio quality and the second radio quality are obtained in parallel;

a control unit configured to control a first communication period length of the first signal and a second communication period length of the second signal so as to make the first radio quality satisfy a first level for transmitting the first signal, and the second radio quality satisfy a second level for transmitting the second signal; and

a comparison unit configured to compare the first communication period length with the second communication period length to obtain a difference between the first communication period length and the second communication period length,

wherein, in a case where at least one of the first radio quality or the second radio quality does not satisfy the corresponding first level or the second level and the difference between the first communication period length and the second communication period length is not smaller than a predetermined length, the control unit is configured to perform control of extending the communication period length of a signal having a smaller communication period length out of the first signal and the second signal by lowering a coding rate of the signal having the smaller communication period length so as to transmit, in the extended communication period length, the same amount of data as data of the signal having the smaller communication period length in the communication period length before extension.

14. The apparatus according to claim 13, wherein the obtaining unit is further configured to obtain the first radio quality and the second radio quality based on a result of measuring, in a third device configured to receive the first signal and a fourth device configured to receive the second signal, a first predetermined signal transmitted from a first device configured to transmit the first signal and a second predetermined signal transmitted from a second device configured to transmit the second signal.

15. A control method in a control apparatus that controls a communication period length of a signal transmitted by radio, the control method comprising:

obtaining, in parallel, a first radio quality regarding a first signal and a second radio quality regarding a second signal when spatially separating and transmitting the first signal of a first communication period length and the second signal of a second communication period length;

determining whether the first radio quality satisfies a first level for transmitting the first signal in the first communication period length and whether the second radio quality satisfies a second level for transmitting the second signal in the second communication period length;

comparing the first communication period length with the second communication period length to obtain a difference between the first communication period length and the second communication period length; and

performing, in a case where at least one of the first radio quality or the second radio quality does not satisfy the corresponding first level or the second level and the difference between the first communication period length and the second communication period length is not smaller than a predetermined length, control of extending the communication period length of a signal having a smaller communication period length out of the first signal and the second signal by lowering a coding rate of the signal having the smaller communication period length so as to transmit, in the extended communication period length, the same amount of data as data of the signal having the smaller communication period length in the communication period length before extension.

16. A control method in a control apparatus that controls a communication period length of a signal transmitted by radio, the control method comprising:

obtaining, in parallel, a first radio quality regarding a first signal and a second radio quality regarding a second signal when spatially separating and transmitting the first signal and the second signal;

comparing a first communication period length of the first signal with a second communication period length of the second signal to obtain a difference between the first communication period length and the second communication period length; and

controlling the first communication period length of the first signal and the second communication period length of the second signal so as to make the first radio quality satisfy a first level for transmitting the first signal, and the second radio quality satisfy a second level for transmitting the second signal by performing, in a case where at least one of the first radio quality or the second radio quality does not satisfy the corresponding first level or the second level and the difference between the first communication period length and the second communication period length is not smaller than a predetermined length, control of extending the communication period length of a signal having a smaller communication period length out of the first signal and the second signal by lowering a coding rate of the signal having the smaller communication period length so as to transmit, in the extended communication period length, the same amount of data as data of the signal having the smaller communication period length in the communication period length before extension.

17. A non-transitory computer-readable storage medium storing a computer program for causing a computer arranged in a control apparatus that controls a communication period length of a signal transmitted by radio to:

obtain, in parallel, a first radio quality regarding a first signal and a second radio quality regarding a second signal when spatially separating and transmitting the first signal of a first communication period length and the second signal of a second communication period length;

determine whether the first radio quality satisfies a first level for transmitting the first signal in the first communication period length and whether the second radio quality satisfies a second level for transmitting the second signal in the second communication period length;

compare the first communication period length with the second communication period length to obtain a difference between the first communication period length and the second communication period length; and

perform, in a case where at least one of the first radio quality or the second radio quality does not satisfy the corresponding first level or the second level and the difference between the first communication period length and the second communication period length is not smaller than a predetermined length, control of extending the communication period length of a signal having a smaller communication period length out of the first signal and the second signal by lowering a coding rate of the signal having the smaller communication period length so as to transmit, in the extended communication period length, the same amount of data as data of the signal having the smaller communication period length in the communication period length before extension.

18. A non-transitory computer-readable storage medium storing a computer program for causing a computer arranged in a control apparatus that controls a communication period length of a signal transmitted by radio to:

obtain, in parallel, a first radio quality regarding a first signal and a second radio quality regarding a second signal when spatially separating and transmitting the first signal and the second signal;

compare a first communication period length of the first signal with a second communication period length of the second signal to obtain a difference between the first communication period length and the second communication period length; and

control the first communication period length of the first signal and the second communication period length of the second signal so as to make the first radio quality satisfy a first level for transmitting the first signal, and the second radio quality satisfy a second level for transmitting the second signal by performing, in a case where at least one of the first radio quality or the second radio quality does not satisfy the corresponding first level or the second level and the difference between the first communication period length and the second communication period length is not smaller than a predetermined length, control of extending the communication period length of a signal having a smaller communication period length out of the first signal and the second signal by lowering a coding rate of the signal having the smaller communication period length so as to transmit, in the extended communication period length, the same amount of data as data of the signal having the smaller communication period length in the communication period length before extension.