Parameter determination device, wireless communication system, and wireless communication method

Abstract

A parameter determination device according to an embodiment is characterized by comprising an acquisition unit that acquires characteristic information indicating a wireless communication characteristic of a wireless communication device, a determination unit that determines, on the basis of the characteristic information acquired by the acquisition unit, a wireless parameter for optimizing wireless communication quality of wireless communication to be performed between the wireless communication device and another wireless communication device, and an output unit that outputs the wireless parameter determined by the determination unit, the characteristic information acquired by the acquisition unit being information indicating a wireless parameter available to the wireless communication device or an evaluation threshold for wireless communication quality based on the wireless parameter available to the wireless communication device.

Description

Parameter Determination Device, Wireless Communication System, and Wireless Communication Method

[0001] The present invention relates to a parameter determination device, a wireless communication system, and a wireless communication method.

[0002] Conventionally, wireless communication systems such as the fifth-generation mobile communication system (5G) that determine wireless parameters according to operation scenarios and wireless environments and perform wireless communication are known. Wireless parameters include, for example, bandwidth, SCS (Sub-Carrier Spacing), MCS (Modulation and Coding Scheme), number of MIMO (Multiple Input Multiple Output) layers, transmission power, and the like.

[0003] For example, in Citation 1, an open-loop type AMC-HARQ that combines adaptive modulation and coding (AMC), which is one of the technologies for improving the utilization rate of a limited frequency band, and hybrid automatic repeat request (HARQ) is disclosed.

[0004] Hasegawa Akira, et al., "A Study on Throughput Improvement of 5G URLLC Using Adaptive Modulation and Coding-based HARQ", IEICE Technical Report, RCS2021-33, June 2021, pp.25-30

[0005] However, conventionally, control for optimizing communication efficiency and communication quality has been performed according to the wireless environment of wireless communication devices constituting the wireless communication system. Therefore, depending on the characteristics of individual wireless communication devices, it may not be possible to sufficiently optimize communication efficiency and communication quality.

[0006] The present invention has been made in view of the above-described problems, and an object thereof is to provide a parameter determination device, a wireless communication system, and a wireless communication method that enable improvement of communication efficiency and communication quality even when the characteristics of individual wireless communication devices constituting the wireless communication system are different.

[0007] A parameter determination device according to one embodiment of the present invention is characterized by comprising: an acquisition unit that acquires characteristic information indicating the wireless communication characteristics of a wireless communication device; a determination unit that determines wireless parameters to optimize the wireless communication quality of wireless communication between the wireless communication device and other wireless communication devices based on the characteristic information acquired by the acquisition unit; and an output unit that outputs the wireless parameters determined by the determination unit.

[0008] Furthermore, a wireless communication system according to one embodiment of the present invention is a wireless communication system comprising a first wireless communication device and a second wireless communication device that communicate wirelessly with each other, characterized in that it comprises a transmitting unit that transmits characteristic information indicating the wireless communication characteristics of the first wireless communication device, a determination unit that determines wireless parameters to optimize the wireless communication quality of the wireless communication performed by the first wireless communication device and the second wireless communication device based on the characteristic information transmitted by the transmitting unit, and a communication control unit that controls the first wireless communication device and the second wireless communication device to communicate wirelessly using the wireless parameters determined by the determination unit.

[0009] Furthermore, a wireless communication method according to one embodiment of the present invention is a wireless communication method implemented by a wireless communication system comprising a first wireless communication device and a second wireless communication device that communicate wirelessly with each other, and is characterized by including a transmission step of transmitting characteristic information indicating the wireless communication characteristics of the first wireless communication device; a determination step of determining wireless parameters that optimize the wireless communication quality of the wireless communication performed by the first wireless communication device and the second wireless communication device based on the characteristic information transmitted in the transmission step; and a communication control step of controlling the first wireless communication device and the second wireless communication device to perform wireless communication using the wireless parameters determined in the determination step.

[0010] According to the present invention, it is possible to improve communication efficiency and communication quality even when the characteristics of the individual wireless communication devices constituting the wireless communication system differ.

[0011] This figure shows an example configuration of a wireless communication system according to one embodiment. This is a functional block diagram illustrating the functions of a terminal device. This is a functional block diagram illustrating the functions of a base station. This figure shows an example of the operation of a wireless communication system. This figure shows an example of the hardware configuration of a base station according to one embodiment.

[0012] A wireless communication system according to one embodiment will be described below with reference to the drawings. Figure 1 is a diagram showing an example of the configuration of a wireless communication system 1 according to one embodiment. As shown in Figure 1, the wireless communication system 1 includes, for example, a plurality of terminal devices 2, a base station 3, and a relay device 4.

[0013] Each terminal device 2 communicates wirelessly with the base station 3, for example, directly or via the relay device 4. The relay device 4 relays the wireless communication between the terminal devices 2 and the base station 3. In other words, the terminal devices 2, the base station 3, and the relay device 4 are all wireless communication devices that communicate wirelessly with each other.

[0014] Furthermore, the wireless communication system 1 according to one embodiment is configured to optimize wireless parameters according to the system's operating scenario, wireless environment, and the capabilities (device characteristics, calibration performance by digital signal processing, etc.) and RF (Radio Frequency) performance of each terminal device 2, base station 3, and relay device 4.

[0015] The radio parameters described above have various effects on the communication efficiency and quality of the wireless communication performed by the wireless communication system 1. For example, radio parameters that compensate for RF imperfections in the terminal device 2 (including nonlinear distortion, IQ (In-phase and Quadrature) imbalance, phase noise, and frequency response of various components) affect communication efficiency and quality. In addition, inter-subarray interference, variations in characteristics between RF front-ends, carrier frequency offset, quantization error, DC (Direct Current) offset, and coupling within the RF chip also affect communication efficiency and quality.

[0016] Specifically, the wireless communication system 1 also performs the following selection (determination) of wireless parameters.

[0017] For example, wireless communication devices such as terminal device 2 are configured to select bandwidth according to the operational scenario and wireless environment. When wideband transmission is performed by increasing the bandwidth, throughput increases, but a decrease in power per unit frequency and an increase in noise power lead to a deterioration of SINR (Signal to Noise plus Interference Ratio). Furthermore, terminal device 2 is concerned about signal quality deterioration if it is affected by the frequency response (non-flatness) of the RF circuit. In addition, terminal device 2's PAPR (Peak to Average Power Ratio) increases as the number of subcarriers used increases.

[0018] Furthermore, wireless communication devices such as terminal device 2 are configured to select the subcarrier spacing (SCS) according to the operational scenario and wireless environment. Generally, widening the subcarrier spacing improves immunity to phase noise and other noises, but it reduces the CP (Cyclic Prefix) length and decreases the immunity to delayed waves. In this case, there is a possibility that the coverage per base station 3 will decrease.

[0019] Furthermore, wireless communication devices such as terminal device 2 are configured to select the MCS according to wireless quality such as SINR. Increasing the MCS index increases throughput, but the required SINR increases because the Euclidean distance between signal points decreases. As a result, immunity to various RF imperfections decreases. In addition, using higher-order modulation can lead to an increase in PAPR, among other things.

[0020] Furthermore, wireless communication devices such as terminal device 2 are configured to select the number of MIMO layers according to wireless quality such as SINR and channel correlation. When channel correlation is low, throughput can be increased by increasing the number of multiplexers, but the required SINR will increase. Also, if MIMO signal separation is not performed correctly due to device distortion, it will cause a degradation of SINR. In addition, when precoding is performed, PAPR occurs, so there is a concern that the signal quality will deteriorate due to amplifier distortion.

[0021] Furthermore, wireless communication devices such as terminal device 2 are configured to select the amount of transmission power according to the operating scenario and wireless environment. Increasing the transmission power increases the CNR (Carrier to Noise Ratio), but there are concerns about degradation of signal quality due to amplifier distortion.

[0022] Therefore, the wireless communication system 1 is configured to select (determine) wireless parameters according to the characteristics (performance) of each terminal device 2, base station 3, and relay device 4, as well as the system's operational scenario and wireless environment. The functions of each wireless communication device constituting the wireless communication system 1 will be described in detail below.

[0023] Figure 2 is a functional block diagram illustrating the functions of the terminal device 2. As shown in Figure 2, for example, the terminal device 2 includes a calculation unit 20, a storage unit 22, a communication control unit 24, a communication unit 26, and a wireless environment calculation unit 28.

[0024] The calculation unit 20 pre-calculates characteristic information indicating the wireless communication characteristics of itself (the terminal device 2) and outputs it to the storage unit 22. The characteristic information includes, for example, information indicating the wireless parameters that can be used by itself (the terminal device 2) (combinations of wireless parameters), and evaluation thresholds for wireless communication quality based on the wireless parameters that can be used by itself (the terminal device 2).

[0025] Furthermore, the characteristic information may also be information indicating wireless parameters that are unavailable to the terminal device 2. Also, the available wireless parameters may be a combination of multiple different parameters. Additionally, the evaluation threshold may be set by prioritizing multiple KPIs (Key Performance Indicators) such as EVM (error vector magnitude), PAPR, out-of-band leakage of the transmitted signal, and received EVM, based on the characteristic data of the terminal device 2's RF circuit.

[0026] The memory unit 22 then stores the characteristic information calculated by the calculation unit 20 in advance and outputs the characteristic information to the communication control unit 24 in response to access from the communication control unit 24. The information stored in the memory unit 22 may be set at the time of factory shipment or may be calculated from measurements taken during operation.

[0027] The communication control unit 24 controls the communication unit 26 and other components to enable wireless communication between itself (the terminal device 2) and the base station 3 (or relay device 4) using the wireless parameters determined by the determination unit 326, which will be described later.

[0028] The communication unit 26 has a transmitting unit 260 and a receiving unit 262, and communicates wirelessly with the relay device 4 or base station 3. For example, the transmitting unit 260 transmits characteristic information and CSI (described later) calculated by the calculation unit 20 to the base station 3 (or relay device 4). The receiving unit 262 receives information transmitted by the base station 3 or relay device 4 (control signals, wireless parameters, etc., described later) and outputs it to the wireless environment calculation unit 28 and the communication control unit 24, etc.

[0029] The wireless environment calculation unit 28 uses control signals (described later) input from the communication unit 26 to calculate information indicating the wireless environment between itself (the terminal device 2) and the base station 3 (or relay device 4), such as CSI (channel state information) and SINR, and outputs it to the communication unit 26, etc.

[0030] The relay device 4 may also have the same configuration and functions as the terminal device 2.

[0031] Figure 3 is a functional block diagram illustrating the functions of the base station 3. As shown in Figure 3, for example, the base station 3 has a main unit 30 and a parameter determination device 32. Note that the parameter determination device 32 is not limited to being provided by the base station 3, but may be configured as an independent device, or it may be integrated with a terminal device 2 or a relay device 4, etc.

[0032] The main unit 30 includes a calculation unit 300, a storage unit 301, an output unit 302, a communication control unit 303, a communication unit 304, and a control signal generation unit 305. The parameter determination device 32 includes a calculation unit 320, a storage unit 322, an acquisition unit 324, a determination unit 326, and an output unit 328.

[0033] The calculation unit 300 pre-calculates characteristic information indicating the wireless communication characteristics of itself (base station 3) and outputs it to the storage unit 301. The characteristic information includes, for example, information indicating the wireless parameters that it (base station 3) can use, and evaluation thresholds for wireless communication quality based on the wireless parameters that it (base station 3) can use.

[0034] Furthermore, the characteristic information may also be information indicating radio parameters that are unavailable to the base station (3). Also, the available radio parameters may be a combination of multiple different parameters. In addition, the evaluation threshold may be set by prioritizing multiple KPIs, such as EVM, PAPR, out-of-band leakage of the transmitted signal and received EVM, based on the characteristic data of the base station's (3) RF circuit.

[0035] The memory unit 301 then stores the characteristic information calculated by the calculation unit 300 in advance and outputs the characteristic information to the output unit 302 in response to access from the output unit 302. The information stored in the memory unit 301 may be set at the time of factory shipment or may be calculated from measurements taken during operation.

[0036] The output unit 302 outputs characteristic information stored in the storage unit 301, as well as information input from the communication unit 304 (characteristic information and CSI transmitted from the terminal device 2 or relay device 4), to the parameter determination device 32.

[0037] The calculation unit 320 pre-calculates available wireless parameters as a reference table (reference table) according to information indicating the wireless environment in the wireless communication system 1 (CSI, SINR, etc., hereinafter also simply referred to as the wireless environment or wireless environment information), and outputs them to the storage unit 322.

[0038] The storage unit 322 pre-stores the wireless parameters calculated by the calculation unit 320 and outputs the wireless parameters to the acquisition unit 324 in response to access from the acquisition unit 324. The storage unit 322 also stores the system operation scenario for the wireless communication system 1.

[0039] The acquisition unit 324 acquires the wireless parameters and operation scenarios previously stored in the storage unit 322, as well as characteristic information and CSI output by the output unit 302, and outputs them to the determination unit 326.

[0040] The determination unit 326 determines the wireless parameters in the wireless communication system 1 based on the information output by the acquisition unit 324 (available wireless parameters based on the wireless environment, operation scenario, CSI, and all characteristic information), and outputs them to the output unit 328.

[0041] For example, the determination unit 326 determines radio parameters to optimize the radio communication quality of the wireless communication between the base station 3 and the terminal device 2 (or relay device 4) based on characteristic information transmitted by the terminal device 2 (or relay device 4). The determination unit 326 also determines radio parameters based on the operational scenario or radio environment for the base station 3 and the terminal device 2 (or relay device 4).

[0042] Furthermore, if there are multiple available wireless parameters (combinations of parameters), the determination unit 326 may determine the wireless parameters based on the priority KPIs. For example, the determination unit 326 may determine the wireless parameters based on prioritized KPIs such as communication capacity, communication quality, and power consumption.

[0043] Alternatively, the determination unit 326 may emulate the transmitted and received signals to determine wireless parameters (combinations of parameters) that satisfy the specifications set by the evaluation threshold.

[0044] That is, based on the radio environment, operation scenario, characteristic information, etc., the determination unit 326 determines radio parameters so as to improve and optimize the communication efficiency and communication quality in the radio communication system 1.

[0045] The output unit 328 outputs the radio parameters determined by the determination unit 326 to the communication control unit 303.

[0046] The communication control unit 303 controls the communication unit 304 and the like so that the base station 3 and the terminal device 2 (or the relay device 4) perform radio communication using the radio parameters and the like output by the output unit 328.

[0047] The communication unit 304 includes a transmission unit 306 and a reception unit 307, and performs radio communication with the relay device 4 or the terminal device 2 mutually. For example, the transmission unit 306 transmits the control signal (described later) generated by the control signal generation unit 305 and the radio parameters determined by the determination unit 326 to the terminal device 2 (or the relay device 4) respectively. The reception unit 307 receives information (characteristic information, CSI, etc.) transmitted by the terminal device 2 or the relay device 4, for example, and outputs it to the output unit 302, the communication control unit 303, and the like.

[0048] The control signal generation unit 305 generates a control signal (known signal) for calculating CSI and outputs it to the communication unit 304.

[0049] Here, the case where the base station 3 includes the parameter determination device 32 has been described as an example, but the parameter determination device 32 may be included in the terminal device 2, the relay device 4, or the like.

[0050] Next, an operation example of the radio communication system 1 will be described. FIG. 4 is a diagram showing an operation example of the radio communication system 1.

[0051] As shown in FIG. 4, in the radio communication system 1, for example, first, the parameter determination device 32 calculates reference radio parameters according to the radio environment information (S100), and stores the calculated radio parameters (S102). Further, the main body device 30 calculates characteristic information (S104) and stores the calculated characteristic information (S106).

[0052] Next, the main unit 30 generates a control signal (S108) and transmits the generated control signal to, for example, the terminal device 2 (S110).

[0053] When terminal device 2 receives a control signal, it calculates wireless environment information (such as CSI and SINR) (S112) and calculates and stores its own characteristic information (S114). Then, terminal device 2 transmits the calculated wireless environment information and characteristic information to base station 3 (S116).

[0054] Next, the base station 3's main unit 30 receives wireless environment information and characteristic information from the terminal device 2 (S118), and outputs the received wireless environment information and characteristic information, along with its own characteristic information, to the parameter determination device 32 (S120).

[0055] The parameter determination device 32 acquires reference wireless parameters, wireless environment information, and characteristic information (S122), determines the wireless parameters to be ultimately used in the wireless communication system 1 (S124), and outputs the determined wireless parameters to the main unit device 30 (S126).

[0056] The main unit 30 then transmits the wireless parameters input from the parameter determination device 32 to the terminal device 2, and controls the terminal device 2 to start wireless communication with the base station 3 using the received wireless parameters (S128, S130).

[0057] Next, a specific example of the operation of wireless communication system 1 will be described. Here, it is assumed that there are 48 (4 x 4 x 3) possible combinations of "candidate wireless parameters" that can be used in wireless communication system 1, as follows: • Subcarrier spacing: 15 kHz, 30 kHz, 60 kHz, 120 kHz (4 combinations) • Modulation scheme: QPSK, 16QAM, 64QAM, 256QAM (4 combinations) • Number of MIMO layers: 1, 2, 4 (3 combinations)

[0058] Furthermore, the priority order of the KPIs is as follows: Maximum channel capacity > Communication quality > Power consumption

[0059] <Example of operation 1: When using a combination of wireless parameters as characteristic information> Terminal device 2 has high phase noise as a device characteristic, and the subcarrier intervals of 15 kHz, 30 kHz, and 60 kHz cannot be used.

[0060] Furthermore, base station 3 has significant imbalances in amplification distortion and IQ imbalance as device characteristics, making it impossible to use 256QAM.

[0061] At this time, the base station 3 outputs the following information to the parameter determination device 32 as characteristic information of the terminal device 2 via the main unit device 30: • Subcarrier spacing: 120 kHz • Modulation scheme: QPSK, 16QAM, 64QAM, 256QAM • Number of MIMO layers: 1, 2, 4

[0062] Furthermore, the base station 3 outputs the following information to the parameter determination device 32 as characteristic information of itself (base station 3) via the main unit device 30: • Subcarrier spacing: 15 kHz, 30 kHz, 60 kHz, 120 kHz • Modulation scheme: QPSK, 16QAM, 64QAM • Number of MIMO layers: 1, 2, 4

[0063] The parameter determination device 32 has a calculation unit 320 that pre-calculates available radio parameters (reference table) corresponding to the CSI and SINR in the wireless communication system 1. Then, based on the actual CSI and SINR input from the main unit 30 and the reference table, the parameter determination device 32 determines, for example, that if the modulation scheme is 64QAM and 256QAM, the MIMO layer count of 4 cannot be used.

[0064] Then, the determination unit 326 of the parameter determination device 32 first selects the following radio parameters that are available to the terminal device 2 (subcarrier interval of 120 kHz) and also available to the base station 3: (1) 16QAM × 4MIMO = 16-bit transmission (2) 256QAM × 2MIMO = 16-bit transmission (3) 256QAM × 1SISO = 8-bit transmission

[0065] Next, the decision unit 326 selects either (1) or (2) above if the highest priority KPI is the maximum channel capacity. In this way, if there are multiple candidate combinations of radio parameters for the highest priority KPI in the wireless communication system 1, the decision unit 326 selects a combination of radio parameters based on the next highest priority KPI. That is, since the second highest priority KPI in the wireless communication system 1 is communication quality, the decision unit 326 refers to the available radio parameters (reference table) corresponding to, for example, SINR, and selects a combination of radio parameters with a large margin. For example, if the required SINR in (1) is smaller than in (2), the decision unit 326 ultimately decides that the combination of radio parameters in (1) should be used as the radio parameters.

[0066] The determination unit 326 may also select a combination of multiple wireless parameters (for example, a combination of 8-bit transmission or more, or any combination of multiple wireless parameters that exceeds a threshold) for the KPI with the highest priority, and then determine the final combination of wireless parameters based on the KPI with the second highest priority.

[0067] Then, base station 3 transmits the final determined combination of radio parameters, for example, the following, to terminal device 2, and initiates wireless communication with terminal device 2 using that combination of radio parameters: • Subcarrier spacing: 120 kHz • Modulation scheme: 16QAM • Number of MIMO layers: 4

[0068] <Second example of operation: When using an evaluation threshold as characteristic information> Terminal device 2 is assumed to be unable to use waveforms with a transmitted EVM of 20 dB or less as a device characteristic.

[0069] Furthermore, due to the characteristics of the transmitting amplifier, base station 3 cannot utilize waveforms with a PAPR of 7 dB or higher.

[0070] Then, the determination unit 326 of the parameter determination device 32 generates a waveform after MIMO precoding processing based on CSI, and determines that the PAPR is 7 dB and that the radio parameters cannot be used when 256QAM is used and when 4MIMO is used with 64QAM or higher.

[0071] Furthermore, the determination unit 326 generates waveforms based on the characteristics of the transmitting device, and determines that if the subcarrier spacing is other than 120 kHz due to the influence of phase noise, the transmission EVM characteristics will deteriorate and the radio parameters that cannot be used will be determined.

[0072] Then, the determination unit 326 of the parameter determination device 32 first selects, for example, a radio parameter that satisfies the following transmission requirements: (1) 16QAM × 4MIMO = 16-bit transmission (2) 64QAM × 2MIMO = 12-bit transmission (3) 64QAM × 1SISO = 6-bit transmission

[0073] Next, the decision unit 326 selects (1) above if the KPI with the highest priority is the one with the maximum channel capacity. Alternatively, the decision unit 326 may select a combination of multiple radio parameters (for example, a combination of multiple radio parameters that exceeds a threshold, such as a combination of 8-bit transmission or more) for the KPI with the highest priority, and then determine the final combination of radio parameters based on the KPI with the second highest priority.

[0074] Then, base station 3 transmits the final determined combination of radio parameters, for example, the following, to terminal device 2, and initiates wireless communication with terminal device 2 using that combination of radio parameters: • Subcarrier spacing: 120 kHz • Modulation scheme: 16QAM • Number of MIMO layers: 4

[0075] Thus, the wireless communication system 1 according to one embodiment determines radio parameters that optimize the wireless communication quality of wireless communication between the base station 3 and the terminal device 2 or relay device 4 based on characteristic information. Therefore, even when the characteristics of the individual wireless communication devices constituting the wireless communication system 1 differ, it is possible to improve communication efficiency and communication quality.

[0076] In this specification, base station 3 may be interpreted interchangeably using terms such as "wireless base station," "NodeB," "eNodeB," "gNodeB," "access point," "cell," "macrocell," "small cell," "femtocell," and "picocell."

[0077] Furthermore, each of the functions of the terminal device 2, base station 3, and relay device 4 may be partially or entirely composed of hardware such as a PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array), or they may be composed of programs executed by a processor such as a CPU.

[0078] For example, base station 3 can be implemented using a computer and a program, and the program can be recorded on a storage medium or provided via a network.

[0079] Figure 5 shows an example of the hardware configuration of a base station 3 according to one embodiment. As shown in Figure 5, for example, the base station 3 has an input unit 50, an output unit 51, a communication unit 52, a CPU 53, a memory 54, and an HDD 55 connected via a bus 56, and is equipped with computer functions. The base station 3 is also configured to be able to input and output data to and from a computer-readable storage medium 57.

[0080] The input unit 50 is, for example, a keyboard and mouse. The output unit 51 is, for example, a display device such as a display that outputs images. The communication unit 52 is a wireless network interface and may also have the function of an output unit that outputs data to the outside.

[0081] The CPU 53 controls each component of the base station 3 and performs predetermined processing. The memory 54 and HDD 55 are storage units that store data, etc.

[0082] The storage medium 57 is capable of storing programs and the like that cause the base station 3 to execute its functions. Note that the architecture of the base station 3 is not limited to the example shown in Figure 5.

[0083] The functions realized by the components described herein may be implemented in a circuitry or processing circuitry, including general-purpose processors, application-specific processors, integrated circuits, ASICs (Application Specific Integrated Circuits), CPUs (a Central Processing Unit), conventional circuits, and / or combinations thereof, programmed to realize the functions described herein.

[0084] A processor includes transistors and other circuits and is considered circuitry or processing circuitry. A processor may also be a programmed processor that executes programs stored in memory.

[0085] In this specification, circuitry, unit, and means are hardware programmed to perform or execute the functions described herein. Such hardware may be any hardware disclosed herein, or any hardware known to be programmed to perform or execute the functions described herein.

[0086] If the hardware is a processor that is considered to be a type of circuitry, then the circuitry, means, or unit is a combination of hardware and software used to constitute the hardware and / or processor.

[0087] 1... Wireless communication system, 2... Terminal device, 3... Base station, 4... Relay device, 20... Calculation unit, 22... Storage unit, 24... Communication control unit, 26... Communication unit, 28... Wireless environment calculation unit, 30... Main unit, 32... Parameter determination device, 50... Input unit, 51... Output unit, 52... Communication unit, 53... CPU, 54... Memory, 55... HDD, 56... Bus, 57... Storage medium, 260... Transmitting unit, 262... Receiving unit, 300... Calculation unit, 301... Storage unit, 302... Output unit, 303... Communication control unit, 304... Communication unit, 305... Control signal generation unit, 306... Transmitting unit, 307... Receiving unit, 320... Calculation unit, 322... Storage unit, 324... Acquisition unit, 326... Determination unit, 328... Output unit,

Claims

1. A parameter determination device comprising: an acquisition unit that acquires characteristic information indicating the wireless communication characteristics of a wireless communication device; a determination unit that determines wireless parameters to optimize the wireless communication quality of wireless communication between the wireless communication device and other wireless communication devices based on the characteristic information acquired by the acquisition unit; and an output unit that outputs the wireless parameters determined by the determination unit.

2. The parameter determination device according to claim 1, characterized in that the characteristic information acquired by the acquisition unit is information indicating wireless parameters available to the wireless communication device, or an evaluation threshold for wireless communication quality based on the wireless parameters available to the wireless communication device.

3. A wireless communication system comprising a first wireless communication device and a second wireless communication device that communicate wirelessly with each other, the system comprising: a transmitting unit that transmits characteristic information indicating the wireless communication characteristics of the first wireless communication device; a determining unit that determines wireless parameters to optimize the wireless communication quality of the wireless communication performed by the first wireless communication device and the second wireless communication device based on the characteristic information transmitted by the transmitting unit; and a communication control unit that controls the first wireless communication device and the second wireless communication device to communicate wirelessly using the wireless parameters determined by the determining unit.

4. The wireless communication system according to claim 3, characterized in that the characteristic information transmitted by the transmitting unit is information indicating wireless parameters available to the first wireless communication device, or an evaluation threshold for wireless communication quality based on the wireless parameters available to the first wireless communication device.

5. The wireless communication system according to claim 3 or 4, characterized in that it has a storage unit that stores characteristic information to be transmitted by the transmitting unit in advance, or a calculation unit that calculates characteristic information to be transmitted by the transmitting unit.

6. The wireless communication system according to claim 3 or 4, characterized in that the determination unit determines wireless parameters based on priority KPIs.

7. The wireless communication system according to claim 3 or 4, characterized in that the determination unit determines wireless parameters based on the operation scenario or wireless environment for the first wireless communication device and the second wireless communication device.

8. A wireless communication method implemented by a wireless communication system comprising a first wireless communication device and a second wireless communication device that communicate wirelessly with each other, the method comprising: a transmission step of transmitting characteristic information indicating the wireless communication characteristics of the first wireless communication device; a determination step of determining radio parameters that optimize the wireless communication quality of the wireless communication performed by the first wireless communication device and the second wireless communication device based on the characteristic information transmitted in the transmission step; and a communication control step of controlling the first wireless communication device and the second wireless communication device to communicate wirelessly using the radio parameters determined in the determination step.

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