Wireless communication system and transmission device

Abstract

The present disclosure relates to a wireless communication system and a transmission device. This wireless communication system comprises a transmission device and a reception device. The transmission device is configured to execute: a process for measuring a transmission capacity of traffic; a process for estimating a traffic trend on the basis of a trained model that has been obtained by machine learning using the measured transmission capacity as training data; a process for determining a transmission scheme to be used on the basis of the estimated traffic trend; a process for switching to the transmission scheme to be used; and a process for transmitting the traffic that has been subjected to modulation using the switched transmission scheme. The reception device is configured to execute: a process for switching a transmission scheme for traffic demodulation in accordance with the transmission scheme of the traffic that has been transmitted by the transmission device; and a process for using the switched transmission scheme to demodulate the traffic.

Description

Wireless communication system and transmitting device

[0001] The present disclosure relates to a wireless communication system and a transmitting device.

[0002] There is a technology for switching a transmission method in wireless communication to an optimal transmission method depending on the current communication state. For example, Patent Document 1 discloses a technology for switching antennas when the presence of an interference wave is detected.

[0003] Japanese Patent Application Publication No. 6-014011

[0004] However, the above-mentioned technology has a problem in that the transmission method is switched in response to a change in the situation, which causes a temporary deterioration in communication quality and traffic loss.

[0005] In order to solve the above-mentioned problems, the first object of the present disclosure is to provide a wireless communication system that can suppress degradation of communication quality and traffic loss by predicting communication abnormalities and switching the transmission method in advance.

[0006] A first aspect of the present disclosure is preferably a wireless communication system including a transmitting device and a receiving device, wherein the transmitting device is configured to perform the following processes: measuring the transmission capacity of traffic; estimating a traffic trend based on a learned model through machine learning using the measured transmission capacity as training data; determining a transmission method to be used based on the estimated traffic trend; switching the transmission method to the transmission method to be used; and transmitting traffic modulated using the switched transmission method; and the receiving device is preferably configured to perform the following processes: switching the transmission method for demodulating traffic in accordance with the transmission method of the traffic transmitted by the transmitting device; and demodulating the traffic using the switched transmission method.

[0007] Furthermore, a second aspect of the present disclosure is preferably a transmitting device configured to perform the following processes: measuring the transmission capacity of traffic; estimating a traffic trend based on a learned model through machine learning using the measured transmission capacity as training data; determining a transmission method to be used based on the estimated traffic trend; switching the transmission method to the transmission method to be used; and transmitting traffic modulated using the switched transmission method.

[0008] According to the first and second aspects of the present disclosure, a deterioration in communication quality and traffic loss can be suppressed by predicting a communication abnormality and switching the transmission method in advance.

[0009] Fig. 1 is a diagram illustrating a configuration example of a wireless communication system according to a first embodiment of the present disclosure. Fig. 2 is a diagram illustrating a hardware configuration example of a transmission device according to the first embodiment of the present disclosure. Fig. 3 is a flowchart illustrating processing performed by the wireless communication system according to the first embodiment of the present disclosure. Fig. 4 is a diagram illustrating a configuration example of a wireless communication system according to a second embodiment of the present disclosure. Fig. 5 is a flowchart illustrating processing performed by the wireless communication system according to the first embodiment of the present disclosure.

[0010] 1 is a diagram illustrating a configuration example of a wireless communication system according to a first embodiment of the present disclosure. The wireless communication system 100 includes a transmitting device 2. The transmitting device 2 has a control unit 20. The control unit 20 has a measuring unit 21. The measuring unit 21 measures the transmission capacity of traffic generated for wireless communication.

[0011] The measurement unit 21 transmits information about the measured transmission capacity to the learning and estimation unit 22. The learning and estimation unit 22 creates a trained model through machine learning using the measured transmission capacity as training data. Furthermore, the learning and estimation unit 22 estimates a traffic trend based on the trained model.

[0012] The learning and estimating unit 22 transmits the estimated traffic trend to the determining unit 23. The determining unit 23 determines the transmission method to be used based on the received traffic trend. In this embodiment, the determining unit 23 determines whether the MIMO method or the SD receiving method is the transmission method to be used.

[0013] The determination unit 23 transmits information on the determined transmission method to be used as a control signal to the changeover switch 26 included in the signal processing unit 25. The control signal is in-channel transmission. The changeover switch 26 switches the connection destination depending on the received information on the transmission method to be used. The connection destination to be switched here is either the MIMO processing unit 27 or the SD processing unit 28.

[0014] The changeover switch 26 also transmits traffic received from upstream via the main signal system to the connected MIMO processing unit 27 or SD processing unit 28. The MIMO processing unit 27 and SD processing unit 28 modulate the received traffic and transmit it to the antennas 30a and 30b.

[0015] The antennas 30a and 30b transmit the received information to the antennas 32a and 32b. If the traffic is modulated by the MIMO processing unit 27, it is transmitted in the MIMO system, and if the traffic is modulated by the SD processing unit 28, it is transmitted in the SD reception system.

[0016] The antennas 32a and 32b transmit the received traffic to the receiving device 4. The receiving device 4 includes a signal processing unit 45. The signal processing unit 45 has a changeover switch 46. When the changeover switch 46 receives traffic from the antennas 32a and 32b, it switches the connection destination depending on the transmission method of the corresponding traffic. The connection destination to be switched here is either a MIMO processing unit 47 or an SD receiving processing unit 48.

[0017] The MIMO processing unit 47 and the SD receiving processing unit 48 demodulate the received traffic and transmit it downstream in the main signal system.

[0018] 2 is a diagram illustrating an example of a hardware configuration of a transmission device according to the first embodiment of the present disclosure. Each function of the transmission device 2 may be partially or entirely configured by hardware such as a programmable logic device (PLD) or a field programmable gate array (FPGA), or may be configured as a program executed by a processor such as a CPU.

[0019] For example, the transmitting device 2 can be realized using a computer and a program, and the program can be recorded on a storage medium or provided via a network.

[0020] 2, the transmitting device 2 has an input unit 200, an output unit 201, a communication unit 202, a CPU 203, a memory 204, and an HDD 205 connected via a bus 206, and functions as a computer. The transmitting device 2 is also capable of inputting and outputting data to and from a computer-readable storage medium 207.

[0021] The input unit 200 is, for example, a keyboard and a mouse, etc. The output unit 201 is, for example, a display device such as a display.

[0022] The communication unit 202 is, for example, a communication interface that communicates with a wireless device to be controlled.

[0023] The CPU 203 controls each component of the transmitting device 2 and performs predetermined processing, etc. The memory 204 and HDD 205 store data, etc.

[0024] The storage medium 207 is capable of storing programs and the like that cause the transmission device 2 to execute the functions of the transmission device 2. Note that the architecture that configures the transmission device 2 is not limited to the example shown in FIG.

[0025] 3 is a flowchart showing a process performed by the wireless communication system according to the first embodiment of the present disclosure. First, in step 100, the control unit 20 included in the transmitting device 2 measures the transmission capacity of traffic generated for wireless communication. This measurement is performed periodically.

[0026] Next, the control unit 20 performs machine learning using the measured transmission capacity as training data in step 102. Here, the control unit 20 creates a trained model through this machine learning.

[0027] Next, in step 104, the control unit 20 estimates a traffic trend based on the trained model. Here, the traffic trend estimated by the control unit 20 may indicate, for example, changes in transmission capacity by time period. Alternatively, the traffic trend acquired by the control unit 20 may indicate changes by weather, day of the week, or time of year. Changes by time period may be, for example, changes between periods when transmission capacity is expected to increase and other periods. Examples of periods when transmission capacity is expected to increase include the 50th day of the month, the beginning and end of the month, public holidays, and long holidays.

[0028] Next, in step 106, the control unit 20 determines the transmission method to be used based on the estimated traffic trend. The control unit 20 also transmits information on the determined transmission method to the signal processing unit 25 provided in the transmitting device 2. After completing step 106, the control unit 20 returns to step 100 and repeats the previous steps.

[0029] In the determination of this embodiment, the transmission method is set to the MIMO method during a time period when it is estimated that the transmission capacity will be greater than a specific threshold, thereby increasing the transmission capacity.

[0030] In this embodiment, the transmission method is set to the SD reception method during the time period when the transmission capacity is estimated to be equal to or less than the threshold value. As a result, the transmission capacity is reduced compared to the MIMO method, but communication quality can be improved.

[0031] If it is estimated that the transmission capacity will be insufficient even if the transmission method is the MIMO method, the control unit 20 may transmit traffic in order of priority based on QoS.

[0032] Next, the signal processing unit 25 switches the transmission method to the transmission method to be used in step 108. Furthermore, the transmitting device 2 transmits the traffic modulated using the switched transmission method.

[0033] Next, in step 110, the signal processing unit 45 included in the receiving device 4 switches the transmission method for demodulating the traffic in accordance with the transmission method of the traffic transmitted by the transmitting device 2. The receiving device 4 demodulates the traffic using the switched transmission method.

[0034] As described above, in the wireless communication system according to this embodiment, the transmission method to be used is determined based on a traffic trend estimated in advance. That is, by predicting a communication abnormality and switching the transmission method in advance, it is possible to suppress a deterioration in communication quality and traffic loss.

[0035] 4 is a diagram illustrating a configuration example of a wireless communication system according to a second embodiment of the present disclosure. A wireless communication system 200 according to this embodiment differs from the wireless communication system 100 in that the wireless communication system 200 has three switchable transmission methods. The explanation of FIG. 4 will focus on the differences from FIG. 1.

[0036] The transmitting device 2a includes a control unit 20a. The control unit 20a includes a parameter control unit 24. The parameter control unit 24 derives parameters required for the FTN (Faster-than-Nyquist) method, which will be described later. The parameters required for the FTN method include, for example, the compression rate.

[0037] For example, in order to derive appropriate values ​​for parameters required in the FTN system, the parameter control unit 24 creates a trained model by machine learning using, for example, traffic, compression rate, and compression results as training data. Furthermore, the parameter control unit 24 estimates an appropriate value for the compression rate based on the trained model.

[0038] The learning and estimating unit 22 transmits the estimated traffic trend to the determining unit 23. The determining unit 23 determines the transmission method to be used based on the received traffic trend. In this embodiment, the determination determines whether the transmission method to be used is the MIMO method, the SD receiving method, or the FTN method.

[0039] The determination unit 23 transmits information on the determined transmission method to be used as a control signal to the changeover switch 26 included in the signal processing unit 25a. The changeover switch 26 switches the connection destination according to the received information on the transmission method to be used. The connection destination to be switched here is one of the MIMO processing unit 27, SD processing unit 28, and FTN processing unit 29.

[0040] The changeover switch 26 also transmits traffic received from upstream via the main signal system to the connected MIMO processing unit 27, SD processing unit 28, or FTN processing unit 29. The MIMO processing unit 27, SD processing unit 28, and FTN processing unit 29 modulate the received traffic and transmit it to the antennas 30 a and 30 b.

[0041] When the FTN processing unit 29 modulates the received traffic, it obtains the necessary parameters from the parameter control unit 24 .

[0042] The antennas 30a and 30b transmit the received information to the antennas 32a and 32b. The traffic to be transmitted is transmitted in the MIMO system if it has been processed by the MIMO processing unit 27, in the SD reception system if it has been processed by the SD processing unit 28, and in the FTN system if it has been processed by the FTN processing unit 29.

[0043] The antennas 32a and 32b transmit the received traffic to the receiving device 4a. The receiving device 4a includes a signal processing unit 45a. The signal processing unit 45a has a changeover switch 46. When the changeover switch 46 receives traffic from the antennas 32a and 32b, it switches the connection destination depending on the transmission method of the corresponding traffic. The connection destination to be switched here is one of the MIMO processing unit 47, the SD reception processing unit 48, and the FTN processing unit 49.

[0044] The MIMO processing unit 47, the SD reception processing unit 48, and the FTN processing unit 49 demodulate the received traffic and transmit it downstream in the main signal system.

[0045] 5 is a flowchart showing a process performed by the wireless communication system according to the first embodiment of the present disclosure. Note that this flowchart is the same as FIG. 3 except for step 106a. Therefore, explanations of steps other than step 106a will be omitted here.

[0046] In step 106a, the control unit 20a determines the transmission method to be used based on the estimated traffic trend. The control unit 20a also transmits information on the determined transmission method to the signal processing unit 25a included in the transmitting device 2. After completing step 106a, the control unit 20a returns to step 100 and repeats the previous steps.

[0047] In the determination of this embodiment, the transmission method is set to the MIMO method during a time period when the transmission capacity is estimated to be greater than the first threshold and equal to or less than the second threshold, thereby increasing the transmission capacity.

[0048] In the determination of this embodiment, the transmission method is set to the SD reception method during a time period when the transmission capacity is estimated to be equal to or less than the first threshold. As a result, the transmission capacity is reduced compared to the MIMO method, but communication quality can be improved.

[0049] Furthermore, in the determination of this embodiment, if it is estimated that the transmission capacity will be greater than the second threshold, the transmission method is set to the FTN method, which results in a further increase in transmission capacity compared to when the transmission method is set to the MIMO method.

[0050] If it is estimated that the transmission capacity will be insufficient even if the transmission method is the FTN method, the control unit 20 may transmit traffic in order of priority based on QoS.

[0051] As described above, in the wireless communication system according to this embodiment, the transmission method to be used is determined based on a traffic trend estimated in advance. That is, by predicting a communication abnormality and switching the transmission method in advance, it is possible to suppress a deterioration in communication quality and traffic loss.

[0052] Furthermore, in this embodiment, by making the FTN method selectable, it is possible to further increase the transmission capacity when it is estimated that the transmission capacity will be insufficient even if the transmission method is the MIMO method. In other words, it is possible to more efficiently suppress the deterioration of communication quality and traffic loss.

[0053] 2 Transmitting device 2a Transmitting device 4 Receiving device 4a Receiving device 100 Wireless communication system 200 Wireless communication system

Claims

1. A wireless communication system comprising a transmitting device and a receiving device, wherein the transmitting device is configured to perform the following processes: measuring traffic transmission capacity; estimating a traffic trend based on a trained model through machine learning using the measured transmission capacity as training data; determining a transmission method to be used based on the estimated traffic trend; switching the transmission method to the transmission method to be used; and transmitting traffic modulated using the switched transmission method; and the receiving device is configured to perform the following processes: switching a transmission method for demodulating traffic transmitted by the transmitting device in accordance with the transmission method of the traffic; and demodulating the traffic using the switched transmission method.

2. The wireless communication system according to claim 1, wherein the determining process includes: determining whether the transmission capacity is equal to or less than a specific threshold; switching the transmission method to an SD reception method during a time period when the transmission capacity is estimated to be equal to or less than the threshold; and switching the transmission method to a MIMO method during a time period when the transmission capacity is estimated to be greater than the threshold.

3. The wireless communication system according to claim 1, wherein the determining process is realized by: determining whether the transmission capacity is equal to or less than a first threshold and whether it is equal to or less than a second threshold; setting the transmission method to an SD reception method during a time period when the transmission capacity is estimated to be equal to or less than the first threshold; setting the transmission method to a MIMO method during a time period when the transmission capacity is estimated to be greater than the first threshold and equal to or less than the second threshold; and setting the transmission method to an FTN method when the transmission capacity is estimated to be greater than the second threshold.

4. A transmitting device configured to perform the following processes: measuring traffic transmission capacity; estimating traffic trends based on a trained model through machine learning using the measured transmission capacity as training data; determining the transmission method to be used based on the estimated traffic trend; switching the transmission method to the transmission method to be used; and transmitting traffic modulated using the switched transmission method.

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