Display system, display device, display method, and program

Abstract

A display system (10) comprises a generation unit (11) which generates a wireless communication quality map indicating a wireless communication quality distribution in a target space on the basis of wireless communication quality information relating to wireless communication quality in the target space, an estimation unit (12) which estimates a deterioration factor of the communication quality in the target space on the basis of the wireless communication quality information, and a display unit (13) which generates display information for displaying the deterioration factor of the communication quality estimated by the estimation unit (12) such that the deterioration factor is superimposed on the wireless communication quality map generated by the generation unit (11).

Description

Display system, display device, and display method

[0001] The present disclosure relates to a display system, a display device, and a display method.

[0002] In wireless communication systems, the radio wave environment changes due to various factors, causing fluctuations in communication quality, and therefore technologies for managing communication quality are used. For example, a related technology is known, such as that disclosed in Patent Document 1. Patent Document 1 describes a method for detecting low-quality cells using a call log or the like of a base station and displaying the detected low-quality cells on a map.

[0003] Japanese Patent Application Laid-Open No. 2017-208717

[0004] However, related technologies such as those in Patent Document 1 only analyze base station call logs, etc., and display low-quality cells on a map, making it difficult to effectively grasp information that supports communication quality management.

[0005] In view of the above-described problems, the present disclosure aims to provide a display system, a display device, and a display method that enable effective comprehension of information that supports management of communication quality.

[0006] The display system according to the present disclosure includes a generating means for generating a wireless communication quality map showing a wireless communication quality distribution in a target space based on wireless communication quality information relating to wireless communication quality in the target space, an estimating means for estimating factors of degradation of communication quality in the target space based on the wireless communication quality information, and a display means for generating display information for superimposing the estimated factors of degradation of communication quality on the generated wireless communication quality map.

[0007] The display device according to the present disclosure includes a generating means for generating a wireless communication quality map showing a wireless communication quality distribution in a target space based on wireless communication quality information relating to wireless communication quality in the target space, an estimating means for estimating factors of degradation of communication quality in the target space based on the wireless communication quality information, and a display means for generating display information for superimposing the estimated factors of degradation of communication quality on the generated wireless communication quality map.

[0008] The display method according to the present disclosure generates a wireless communication quality map showing the distribution of wireless communication quality in a target space based on wireless communication quality information regarding wireless communication quality in the target space, estimates factors that cause degradation of communication quality in the target space based on the wireless communication quality information, and generates display information for superimposing the estimated factors that cause degradation of communication quality on the generated wireless communication quality map.

[0009] According to the present disclosure, it is possible to provide a display system, a display device, and a display method that enable effective understanding of information that assists in managing communication quality.

[0010] 1 is a diagram showing a display example of a related display method. FIG. 2 is a diagram showing a display example of a display method according to an embodiment. FIG. 3 is a configuration diagram showing an overview of a display system according to an embodiment. FIG. 4 is a configuration diagram showing an overview of a display device according to an embodiment. FIG. 5 is a flowchart showing an overview of a display method according to an embodiment. FIG. 6 is a configuration diagram showing an example of a configuration of an operation management system according to embodiment 1. FIG. 7 is a configuration diagram showing an example of a configuration of a wireless information transmission function according to embodiment 1. FIG. 8 is a configuration diagram showing an example of a configuration of an operation management server according to embodiment 1. FIG. 9 is a flowchart showing an example of operation of the operation management server according to embodiment 1. FIG. 10 is a flowchart showing an example of operation of a received power map generation process according to embodiment 1. FIG. 11 is a diagram for explaining the received power map generation process according to embodiment 1. FIG. 12 is a diagram for explaining the received power map generation process according to embodiment 1. FIG. 13 is a diagram for explaining the received power map generation process according to embodiment 1. FIG. 14 is a diagram for explaining the received power map generation process according to embodiment 1. FIG. 15 is a diagram for explaining the received power map generation process according to embodiment 1. FIG. 16 is a diagram showing an example of an operation management screen according to embodiment 1. FIG. 17 is a diagram showing another example of an operation management screen according to embodiment 1. FIG. 18 is a diagram showing another example of an operation management screen according to embodiment 1. FIG. 19 is a diagram showing another example of an operation management screen according to embodiment 1. FIG. 19 is a diagram showing another example of an operation management screen according to embodiment 1. Fig. 10 is a diagram showing an example of an operation management screen according to embodiment 2. Fig. 11 is a configuration diagram showing an overview of hardware of a computer according to an embodiment.

[0011] Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description will be omitted as necessary.

[0012] (Considerations Leading to Embodiments) The inventors have considered a display method for an operator (administrator) to manage communication quality in a wireless communication system. As a related technique, for example, as shown in FIG. 1 , a method can be considered in which a floor map of floors where a wireless communication system provides service is displayed and locations where communication quality has deteriorated are displayed on the floor map. In the example of FIG. 1 , an icon indicating deterioration of communication quality is displayed at a location where communication quality, such as delay, does not meet requirements. This display allows an operator to grasp the location where communication quality has deteriorated and consider countermeasures as necessary. However, even if the location where communication quality has deteriorated can be identified, it is difficult to consider specific countermeasures based only on the information on the deteriorated location.

[0013] For example, when an automated guided vehicle (AGV) using wireless communication moves through the floor of a warehouse or other facility, if the AGV stops due to a deterioration in communication quality, the display screen does not provide a clear indication of the cause of the stoppage. Therefore, while the display method shown in Figure 1 identifies the location of the deterioration in communication quality, it does not provide information to support communication quality management, such as information necessary for considering countermeasures. Furthermore, because the deterioration in communication quality occurring in a specific area, such as a floor, may be due to multiple factors rather than a single factor, simply identifying the deterioration in communication quality may prevent appropriate countermeasures from being considered and implemented. Furthermore, because communication quality deterioration may occur due to different factors at adjacent locations, countermeasures for a terminal at a specific location may not be appropriate for all terminals, including those at other locations. Furthermore, when communication quality deterioration is due to multiple factors, the effective countermeasure may vary depending on the impact of the addressed factors. However, related display methods have not yet been developed to effectively present this information to operators. Furthermore, because the items that operators want to evaluate may differ depending on the site they manage, it is desirable to be able to display the necessary information accordingly.

[0014] Therefore, in the embodiment, for example, as shown in FIG. 2, by displaying the causes of degradation in communication quality at points on a reception power map showing the distribution of reception power that do not satisfy the communication quality requirements, it is possible to effectively grasp information that assists in managing communication quality.

[0015] 3 shows a schematic configuration of a display system 10 according to an embodiment. The display system 10 is a system for managing wireless communication quality in a wireless communication system in which an application terminal such as an AGV performs wireless communication.

[0016] As shown in FIG. 3 , the display system 10 includes a generation unit 11, an estimation unit 12, and a display unit 13. The generation unit 11 generates a wireless communication quality map showing the distribution of wireless communication quality in the target space based on wireless communication quality information related to wireless communication quality in the target space. The target space is a predetermined area, such as a floor on which an application terminal moves during operation. The wireless communication quality includes wireless quality related to radio waves or communication quality related to communication between communication devices. For example, the wireless quality is an index indicating the received power or radio wave strength of radio waves, such as RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), RSSI (Received Signal Strength Indicator), or SINR (Signal to Interference plus Noise Power Ratio). For example, the communication quality is an index indicating the quality of traffic, such as throughput or delay time. It can also be said that wireless quality and communication quality have a certain relationship. That is, there is a relationship in which worsening wireless quality leads to worsening communication quality, such as worsening RSSI leading to worsening throughput. The generating unit 11 may generate a wireless quality map indicating a wireless quality distribution based on wireless quality information such as received power, or may generate a communication quality map indicating a communication quality distribution based on communication quality information such as throughput. The generating unit 11 may generate a wireless communication quality map based on wireless communication quality information measured at a plurality of points in a target space.

[0017] The estimation unit 12 estimates factors that cause degradation of communication quality in the target space based on the wireless communication quality information. The estimation unit 12 may estimate the factors that cause degradation of communication quality based on, for example, wireless quality information such as received power included in the wireless communication quality information. The factors that cause degradation of communication quality are factors related to the radio wave propagation environment that cause degradation of communication quality such as throughput. For example, factors that cause fluctuations in received power in the radio wave propagation environment include attenuation over distance, fading, and shielding. The estimation unit 12 may also estimate the degree of degradation of communication quality for each degradation factor in the target space based on the wireless communication quality information. The degree of degradation is the degree to which each degradation factor contributes to degradation of communication quality, and is the influence level indicating the extent to which each degradation factor affects degradation of communication quality. For example, the degree of degradation is the amount of decrease in throughput due to each degradation factor such as attenuation over distance, fading, and shielding.

[0018] The display unit 13 generates display information for superimposing the degradation factors of communication quality estimated by the estimation unit 12 on the wireless communication quality map generated by the generation unit 11. The display unit 13 may display a wireless quality map showing a wireless quality distribution of received power or the like, or a communication quality map showing a communication quality distribution of throughput or the like, and generate display information for superimposing the degradation factors of communication quality on the wireless quality map or the communication quality map. For example, as shown in FIG. 2 , the display unit 13 displays a received power map and generates display information for identifiably displaying the estimated degradation factors of communication quality at positions of communication quality degradation on the received power map. As shown in the example of FIG. 2 , the display information may display degradation factors such as distance attenuation, fading, and obstruction using different hatching patterns or colors, or may display them using different icons. Furthermore, when the display unit 13 estimates the degradation degree of communication quality for each degradation factor in the target space, it may generate display information for displaying the estimated degradation degree in association with the wireless communication quality map. As an example of displaying the degree of degradation in association with the wireless communication quality map, the estimated degree of degradation may be superimposed on each position on the wireless communication quality map, or the estimated degree of degradation may be displayed on a screen (e.g., a dashboard screen) separate from the wireless communication quality map screen.

[0019] The display system 10 may be configured with one device or multiple devices. FIG. 4 shows an example configuration of a display device 20 according to an embodiment. As shown in FIG. 4, the display device 20 may include the generation unit 11, estimation unit 12, and display unit 13 shown in FIG. 4. For example, the generation unit 11, estimation unit 12, and display unit 13 may all be located in a management server or the like, or may be distributed across multiple devices. For example, the display unit 13 may display the generated display information, or may output the generated display information to an external device such as a display and display it on the external device.

[0020] 5 shows a display method according to the embodiment. For example, the display method according to the embodiment is executed by the display system 10 or the display device 20 shown in FIGS.

[0021] 5, the generator 11 generates a wireless communication quality map indicating a wireless communication quality distribution in the target space based on wireless communication quality information regarding the wireless communication quality in the target space (S11). For example, the generator 11 generates a wireless quality map indicating a wireless quality distribution of received power or the like, or a communication quality map indicating a communication quality distribution of throughput or the like.

[0022] Next, the estimation unit 12 estimates factors that cause degradation of the communication quality of wireless communication in the target space based on the wireless communication quality information (S12). For example, the estimation unit 12 estimates factors that cause degradation, such as distance attenuation, fading, and shielding, based on the wireless communication quality information.

[0023] Next, the display unit 13 generates display information for superimposing the estimated degradation factors on the generated wireless communication quality map (S13). For example, the display unit 13 generates display information for superimposing the estimated degradation factors, such as distance attenuation, fading, and shielding, on the wireless quality map or the communication quality map. The display unit 13 also displays the generated display information or outputs it to an external device.

[0024] As described above, in the embodiment, a wireless communication quality map such as a wireless quality map or a communication quality map is displayed, and factors of degradation of communication quality can be superimposed on the wireless communication quality map. This allows the wireless communication quality and factors of degradation of communication quality to be grasped at a glance at each point on the map. Therefore, it becomes possible to effectively grasp information that supports management of communication quality from the displayed map.

[0025] (First Embodiment) Next, a first embodiment will be described. In this embodiment, an example will be described in which factors of degradation of communication quality are superimposed and displayed on a received power map.

[0026] 6 shows an example of the configuration of an operation management system 1 according to this embodiment. The operation management system 1 is a system that manages the operation status of application terminals such as AGVs, and manages the wireless quality and communication quality of a wireless communication environment (also referred to as a target wireless communication environment) in which the application terminals perform wireless communication. The target wireless communication environment is a wireless communication environment made possible by radio waves transmitted from a predetermined transmission source. For example, the transmission source is a device that forms a communication area that enables wireless communication, and may be a base station for mobile communications or an access point for a wireless LAN (Local Area Network). Furthermore, in a situation in which a terminal transmits radio waves, the terminal may also be the transmission source.

[0027] As shown in Figure 6, the operation management system 1 includes an operation management server 100, an initial measurement terminal 200, an operation and observation terminal 300, an application terminal 400, and a base station 500. The initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400 are each not limited to one unit, and may be multiple units. Also, one terminal may include the functions of multiple terminals. Note that any of the initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400 may be simply referred to as a terminal.

[0028] The initial measurement terminal 200, the operation observation terminal 300, and the application terminal 400 are connected to the base station 500 so as to be able to communicate wirelessly. Each terminal and the base station 500 may be connected to be able to communicate wirelessly in both directions, or may be connected to be able to communicate wirelessly in at least one direction, either uplink or downlink. For example, the base station 500 may be connected to be able to communicate via a wireless network such as 4G, local 5G / 5G, LTE (Long Term Evolution), or wireless LAN. The base station 500 and the operation management server 100 may be connected to be able to communicate wired or wirelessly. For example, the base station 500 may be connected to be able to communicate via a core network, the Internet, a wide area network (WAN), a LAN, or a combination thereof.

[0029] The initial measurement terminal 200 is an example of a terminal that measures the wireless quality of a target wireless communication environment. The initial measurement terminal 200 measures the wireless quality of the target wireless communication environment before the application terminal 400 is put into operation. For example, the operation management server 100 generates an initial reception power map (first reception power map) from the wireless quality measured before operation. Before the application terminal 400 is put into operation, for example, in the case of an AGV, this may be early morning before warehouse operations begin. However, the timing for measuring the wireless quality of the target wireless communication environment is not limited to before operation. It may be a time period when there are few mobile devices, such as a lunch break or an evening break, or any time when the wireless communication quality map needs to be reset. The initial measurement terminal 200 is a mobile terminal, such as a mobile phone, smartphone, tablet terminal, or IoT (Internet of Things) terminal. The initial measurement terminal 200 measures the reception power of radio waves in the target wireless communication environment at each location to which it moves and transmits the measured reception power and location information to the operation management server 100 via the base station 500. Furthermore, the initial measurement terminal 200 is not limited to a mobile terminal; multiple immobile terminals may also be used. In this case, the multiple initial measurement terminals 200 measure the received power of radio waves at each of the locations where they are installed and transmit the measured received power and location information. For example, the initial measurement terminal 200 transmits wireless information including the measured received power and location information using a wireless information transmission function described below. The initial measurement terminal 200 may transmit the received power and location information, or may transmit only the received power. For example, the initial measurement terminal 200 may perform measurements at a preset location and transmit the measured received power.

[0030] The operational observation terminal 300 is an example of a terminal that measures the wireless quality of a target wireless communication environment. The terminal measures the wireless quality of the target wireless communication environment while the application terminal 400 is in operation. For example, the operation management server 100 generates a display reception power map from the wireless quality measured during this operation. The operational observation terminal 300 is a terminal that measures wireless quality at a predetermined observation point. The terminal may be a fixed terminal whose position is fixed at the predetermined observation point, or a mobile terminal that can move to the predetermined observation point. The observation point is not limited to a predetermined location, but may be, for example, a location (measurement point) where the terminal measures and reports location information. The operational observation terminal 300 may be, for example, a fixed sensor, an IoT terminal, a base station, an access point, or the like. The operational observation terminal 300 may be the same device as the initial measurement terminal 200. For example, the initial measurement terminal 200 may be the operational observation terminal 300, and the initial measurement terminal 200 may measure wireless quality at a predetermined observation point. The operation and observation terminal 300 measures the received power of radio waves in the target wireless communication environment at a predetermined observation point and transmits the measured received power to the operation management server 100 via the base station 500. For example, the operation and observation terminal 300 transmits wireless information including the measured received power using a wireless information transmission function described below. The operation and observation terminal 300 may transmit wireless information including the measured received power and location information.

[0031] The application terminal 400 is an operation terminal that executes functions required for a specific application. The application terminal 400 is also an example of a terminal that measures the wireless quality of a target wireless communication environment. During operation, the application terminal 400 executes the function of a specific application and measures the wireless quality of the target wireless communication environment. For example, the operation management server 100 manages the operation status of the terminal based on the wireless quality measured during operation. The application terminal 400 is a mobile terminal, such as an AGV, an AMR (Autonomous Mobile Robot), an autonomous robot, a self-driving car, or a drone. The application terminal 400 may be the same device as the initial measurement terminal 200. The application terminal 400 may be mobile or not as long as it can report the measured wireless quality. The application terminal 400 measures the received power of radio waves in the target wireless communication environment at each point to which it moves and transmits the measured received power and location information to the operation management server 100 via the base station 500. For example, the application terminal 400 transmits wireless information including the measured received power and location information using a wireless information transmission function described below.

[0032] The base station 500 is a base station device in a wireless network between the initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400, and also serves as a relay device that relays communications between the initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400 and the operation management server 100. For example, the base station 500 is a local 5G base station, a 5G gNB (next generation Node B), an LTE eNB (evolved Node B), a wireless LAN access point, a Bluetooth (registered trademark) base station, etc., but may also be other relay devices. The base station 500 transfers the received power of the target wireless communication environment measured by each terminal to the operation management server 100. For example, the base station 500 is a device separate from the source of the target wireless communication environment, but may also be the same device as the source of the target wireless communication environment. Furthermore, other networks may exist other than the base station 500 for transferring the received power of the target wireless communication environment measured by each terminal to the operation management server 100.

[0033] The operation management server 100 is a server that manages the operation status of the application terminal 400 and manages the wireless quality and communication quality of the target wireless communication environment. The operation management server 100 generates a received power map showing the received power distribution of the target wireless communication environment based on wireless information received from any of the initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400, and displays the generated received power map. In addition to the received power map, wireless quality maps showing the distribution of other wireless qualities may also be generated and displayed. Furthermore, the operation management server 100 estimates factors that cause degradation of communication quality in the target wireless communication environment and the impact of each degradation factor on communication quality based on the received power included in the wireless information received from any of the initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400, or based on the received power included in the generated received power map, and displays the estimated degradation factors and the impact on communication quality on the received power map.

[0034] 7 shows an example of the configuration of the wireless information transmission function 210 according to this embodiment. The wireless information transmission function 210 is included in the initial measurement terminal 200, the operation observation terminal 300, and the application terminal 400. As shown in FIG. 7, the wireless information transmission function 210 includes a received power measurement unit 211, a position detection unit 212, and a wireless information transmission unit 213.

[0035] The received power measurement unit 211 measures the received power of radio waves in the target wireless communication environment. The received power measurement unit 211 receives radio waves transmitted from a transmission source in the target wireless communication environment and measures the received power (radio wave intensity) of the received radio waves. The received power is, for example, RSRP, RSRQ, RSSI, SINR, etc., or may be another index indicating wireless quality. The received power measurement unit 211 outputs received power information indicating the measured received power.

[0036] The position detection unit 212 detects the current location of the terminal including the wireless information transmission function 210. For example, the position detection unit 212 may detect the location using a Global Navigation Satellite System (GNSS) such as the Global Positioning System (GPS), or may detect the location by analyzing video from a camera installed in a location overlooking a predetermined area. The position detection unit 212 may also detect the location of the terminal including the wireless information transmission function 210 based on information from beacons, short-range wireless communications, or reflected light from laser light such as Lidar. The position detection unit 212 may also detect the location using delay times in wireless communications. The wireless communications used may be light such as visible light or infrared light, or radio waves with no frequency restrictions. The position may also be detected using other detection methods. The position detection unit 212 outputs position information indicating the detected location. The operational observation terminal 300 may not be equipped with a position detection unit 212 because it performs measurements at a predetermined observation point. The same applies when the initial measurement terminal 200 performs measurements at a predetermined location.

[0037] The wireless information transmitter 213 transmits wireless information including the received power information measured by the received power measurement unit 211 and the location information detected by the location detection unit 212 to the operation management server 100 via the base station 500. In the case of the operation observation terminal 300, the wireless information transmitter 213 may transmit only the received power information as wireless information. The same applies when the initial measurement terminal 200 performs measurement at a predetermined location. The wireless information transmitter 213 is a communication interface capable of communicating with the base station 500, and is, for example, a wireless interface such as 4G, local 5G / 5G, LTE, or wireless LAN, but may also be a wireless interface of any other communication method.

[0038] 8 shows an example of the configuration of the operation management server 100 according to this embodiment. Note that this configuration is merely an example, and other configurations may be used as long as the operation according to this embodiment, which will be described later, is possible. For example, a portion of the configuration of the operation management server 100 may be located in another device, or the configuration of each part of the operation management server 100 may be distributed across multiple devices. As shown in FIG. 8, the operation management server 100 includes a wireless information receiving unit 110, a wireless information storage unit 120, a received power map generating unit 130, a degradation factor estimating unit 140, an influence estimating unit 150, and a display unit 160.

[0039] The wireless information receiving unit 110 receives wireless information transmitted from the initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400 via the base station 500. The wireless information receiving unit 110 acquires wireless information including received power information and location information transmitted from each terminal. The wireless information receiving unit 110 may acquire wireless information including only received power information from the operation and observation terminal 300. The wireless information receiving unit 110 is a communication interface capable of communicating with the Internet, a core network, etc., and is, for example, a wired interface for IP communication, but may also be a wired or wireless interface for any other communication method.

[0040] The radio information storage unit 120 is a database that stores the radio information received by the radio information receiving unit 110. The radio information storage unit 120 accumulates, as time-series data, the radio information acquired from the initial measurement terminal 200, the operation observation terminal 300, and the application terminal 400. Note that the radio information receiving unit 110 may output the received radio information to the received power map generating unit 130 or the like.

[0041] The reception power map generating unit 130 generates a reception power map based on the wireless information received from each terminal by the wireless information receiving unit 110 and stored in the wireless information storage unit 120. The reception power map generating unit 130 generates a reception power map that indicates the distribution of reception power in a predetermined area of ​​the target wireless communication environment based on the reception power information and location information included in the wireless information. For example, the predetermined area is a floor where the application terminal 400 moves during operation.

[0042] The reception power map generation unit 130 may generate the reception power map based on radio information acquired from any of the initial measurement terminal 200, the operation and observation terminal 300, and the application terminal 400, or may generate the reception power map based on radio information acquired from each terminal. For example, before operation, an initial reception power map may be generated based on radio information measured at each point by the initial measurement terminal 200 as it moves, and then, during operation, the initial reception power map may be corrected based on radio information measured at each point by the operation and observation terminal 300 at the observation point, and the corrected reception power map may be output as the reception power map for display. Furthermore, during operation, the displayed reception power map may be updated based on radio information measured at the observation point by the operation and observation terminal 300 or radio information measured by the application terminal 400.

[0043] The degradation factor estimation unit 140 estimates the degradation factors of communication quality at each point of the reception power map based on the reception power information included in the wireless information received from each terminal by the wireless information receiving unit 110 and stored in the wireless information storage unit 120, or the reception power information included in the reception power map generated by the reception power map generation unit 130.

[0044] Examples of communication quality include throughput, delay time, jitter, hybrid automatic repeat count, hybrid automatic repeat excess count, radio link control retransmission count, block error rate (BLER), packet loss rate, and bit error rate (BER). A state in which communication quality is degraded refers to a state in which communication quality is lower than a tolerable lower limit. Estimated factors for communication quality degradation include distance attenuation, fading, and obstruction. Degradation of communication quality due to distance attenuation is caused by the distance between a transmission source and a terminal being longer than the appropriate distance for proper wireless communication. Degradation of communication quality due to fading is caused by the occurrence of at least one of coherent fading (so-called multipath fading), polarization fading, hopping fading, absorption fading, selective fading, and K-type fading. Degradation of communication quality due to obstruction is caused by the presence of a physical obstacle between a transmission source and a terminal that blocks radio waves (i.e., prevents radio wave propagation). Other factors that can cause degradation in communication quality include interference, congestion, handover, etc. Degradation in communication quality due to interference is caused by radio waves from multiple transmission sources interfering with each other. Degradation in communication quality due to congestion is caused by insufficient radio resources being allocated to a terminal. Degradation in communication quality due to handover is caused by a terminal located near the cell boundary of two adjacent base stations repeatedly handing over between the two base stations.

[0045] For example, the degradation factor estimation unit 140 may estimate a degradation factor of communication quality from received power information using a degradation factor estimation model 141 that estimates a degradation factor. The degradation factor estimation model 141 is a learning model that machine-learns degradation factors of communication quality according to a time series of received power information. The degradation factor estimation model 141 may be stored in an internal storage unit of the operation management server 100 or an external storage device. The degradation factor estimation model 141 may be a convolutional neural network (CNN), a recurrent neural network (RNN), a long-short term model (LSTM), or any other neural network. The degradation factor estimation model 141 is not limited to a neural network and may be any other machine learning model. The degradation factor estimation unit 140 inputs a time series of received power information to the degradation factor estimation model 141 and estimates a degradation factor of communication quality.

[0046] The influence estimating unit 150 estimates the influence of each degradation factor on communication quality at each point on the reception power map based on the reception power information included in the wireless information received by the wireless information receiving unit 110 from each terminal and stored in the wireless information storage unit 120, or the reception power information included in the reception power map generated by the reception power map generating unit 130. The influence of each degradation factor on communication quality is the degree of degradation of communication quality for each degradation factor. The degree of degradation may be the rate at which communication quality deteriorates, or the amount of deterioration by which communication quality deteriorates.

[0047] The influence estimation unit 150 may estimate the degree of degradation of communication quality for each degradation factor using a learning model that performs machine learning on the degree of degradation (impact) of each degradation factor on communication quality according to a time series of received power information. For example, the influence estimation unit 150 may estimate the degree of degradation of communication quality for each degradation factor using an intermediate indicator estimation model 151 that estimates an intermediate indicator for determining the degree of degradation. The intermediate indicator is a physical indicator that represents the tendency (strength) of the degradation factor, such as the initial distance between the transmitter and the receiver (for example, the transmitter is the transmission source and the receiver is the terminal), the moving speed of the receiver, the amount of attenuation due to shielding, the K factor, etc. The initial distance between the transmitter and the receiver and the moving speed of the receiver are examples of physical indicators that represent the tendency of the degradation factor of distance attenuation. The amount of attenuation due to shielding is an example of a physical indicator that represents the tendency of the degradation factor of shielding. The K factor is an example of a physical indicator that represents the tendency of the degradation factor of fading. The K factor is the ratio between the power of the direct wave and the sum of the power of N elementary waves. The intermediate index estimation model 151 is a learning model that machine-learns intermediate indexes corresponding to the time series of received power information. The intermediate index estimation model 151 may be stored in an internal storage unit of the operation management server 100 or an external storage unit. The intermediate index estimation model 151 may be a CNN, an RNN, an LSTM, or another neural network. The intermediate index estimation model 151 is not limited to a neural network and may be another machine learning model. The influence estimator 150 inputs received power information into the intermediate index estimation model 151 and estimates an intermediate index. Furthermore, the influence estimator 150 converts the estimated intermediate index into a degree of degradation of communication quality for each degradation factor using a predetermined conversion function.

[0048] The display unit 160 generates display information for displaying the processing results of each unit of the operation management server 100. The display unit 160 may include a display device such as a liquid crystal display or an organic EL display, and may display the generated display information. The display unit 160 may also output the generated display information to a display device external to the operation management server 100 and display it on the external display device. For example, the display unit 160 displays the generated display information on an operation management screen using a GUI (Graphical User Interface). The display information includes information for displaying a received power map, a degradation factor estimation result, an influence estimation result, etc. Note that the process of displaying on the screen includes a process of generating display information to be displayed on the screen and a process of displaying the generated display information, and therefore generating and displaying the generated display information may be simply referred to as "display." The display unit 160 displays the received power map generated by the received power map generation unit 130 on the operation management screen, and superimposes the degradation factor estimation result from the degradation factor estimation unit 140 and the influence estimation result from the influence estimation unit 150 on the received power map. The display unit 160 may acquire information about a floor map showing a specific floor from an internal storage unit of the operation management server 100 or an external storage device, and display a received power map on the floor map.

[0049] 9 shows an example of the operation of the operation management server 100 according to this embodiment. Note that the process flow in FIG. 9 is an example, and the order of the processes is not limited as long as the operation management screen can be displayed. For example, the degradation factor estimation process (S130) and the impact estimation process (S140) may be executed in parallel, or one of them may be executed first. Alternatively, only one of the degradation factor estimation process (S130) and the impact estimation process (S140) may be executed.

[0050] Furthermore, the operation management screen display process (S150) may be executed sequentially for each of the received power map generation process (S120), the degradation factor estimation process (S130), and the influence estimation process (S140). For example, the operation management screen display process (S150) may be executed following the received power map generation process (S120) to display the received power map on the operation management screen, and the operation management screen display process (S150) may be executed following the degradation factor estimation process (S130) and the influence estimation process (S140) to display the degradation factor estimation result and the influence estimation result on the operation management screen. Furthermore, the operation management screen display process (S150) may be executed together with any or all of the received power map generation process (S120), the degradation factor estimation process (S130), and the influence estimation process (S140) at a timing corresponding to an operator's operation or at a predetermined interval, etc.

[0051] 9 , the operation management server 100 acquires radio information (S110). The radio information receiving unit 110 receives radio information from each terminal and stores the received radio information in the radio information storage unit 120. For example, the radio information receiving unit 110 acquires radio information from the initial measurement terminal 200 before operation as information for generating a received power map, and acquires radio information from the operation observation terminal 300 during operation. The radio information receiving unit 110 also acquires radio information from the application terminal 400 during operation as information for managing the application terminal 400.

[0052] Next, the operation management server 100 generates a received power map from the acquired radio information (S120). A specific example of the received power map generation process according to this embodiment will be described with reference to Fig. 10. Fig. 10 includes the radio information acquisition process (S110) and the received power map generation process (S120) of Fig. 9.

[0053] As shown in FIG. 10 , the received power map generating unit 130 acquires radio information from the initial measurement terminal 200 before operation (S121). For example, before operation, a measurer moves around the floor carrying the initial measurement terminal 200, and the initial measurement terminal 200 measures the received power at multiple locations and transmits the measured received power information and location information to the operation management server 100. Instead of a measurer, a robot such as an AGV may carry the initial measurement terminal 200 and move around the floor, measuring the received power at each location. The initial measurement terminal 200 may be installed at multiple locations and measure the received power at multiple fixed positions. The radio information receiving unit 110 of the operation management server 100 receives radio information including the received power information and location information at multiple locations from the initial measurement terminal 200 and stores the received radio information in the radio information storage unit 120. For example, as shown in FIG. 11 , the initial measurement terminal 200 moves through the floor, measures the received power at multiple initial measurement points along its path, and stores radio information including the location information and received power information of the multiple initial measurement points in the radio information storage unit 120. The received power map generation unit 130 acquires the radio information of the multiple initial measurement points stored in the radio information storage unit 120. The intervals between the initial measurement points may be equal as shown in FIG. 11 or may be different. For example, measurements may be made at narrow intervals in areas where the received power changes significantly, and at wider intervals in areas where the received power changes less significantly. Measurements may be made at narrow intervals in areas close to the source of transmission and at wider intervals in areas far from the source of transmission. Measurements may be made at narrow intervals when the mobile terminal is moving slowly, and at wider intervals when the mobile terminal is moving quickly. Measurements may be made at narrow intervals in areas frequently used by the application terminal 400, and at wider intervals in areas less frequently used by the application terminal 400.

[0054] Next, the reception power map generating unit 130 generates an initial reception power map based on the radio information acquired from the initial measurement terminal 200 (S122). The reception power map generating unit 130 generates an initial reception power map showing the reception power distribution before operation based on multiple pieces of radio information, including location information and reception power information, stored in the radio information storage unit 120. For example, as shown in FIG. 12 , a reception power map showing the reception power distribution of the entire floor is generated from the reception power information of multiple initial measurement points. The reception power map generating unit 130 generates a reception power map for the entire floor by estimating the reception power information of each point other than the initial measurement point (which may include the initial measurement point) based on the reception power information of the initial measurement point. The estimation method may be spatial interpolation such as linear interpolation or kriging, or another method. The reception power map is data in which reception power is mapped to each position in a target space, such as a floor, and can be represented as a heat map or contour lines corresponding to the reception power at each position.

[0055] Next, the reception power map generator 130 acquires radio information from the operation observation terminal 300 during operation (S123). After generating an initial reception power map before operation, during operation, the operation observation terminal 300 measures reception power at the positions of predetermined observation points and transmits radio information including the measured reception power information to the operation management server 100. For example, as shown in FIG. 13 , the operation observation terminals 300 are placed at two observation points M1 and M2, the reception power at the observation points M1 and M2 is measured, and the reception power map generator 130 acquires the reception power information at the observation points M1 and M2. The position information of the observation points may be acquired from the operation observation terminal 300 or may be set in advance. The number of observation points (operation observation terminals 300) that perform observation during operation is, for example, two, but may be any number greater than or equal to one.

[0056] Next, the reception power map generation unit 130 corrects the initial reception power map based on the radio information acquired from the operation observation terminal 300 (S124). The reception power map generation unit 130 corrects the reception power information of the entire initial reception power map using the reception power information of the observation points measured by the operation observation terminal 300 and the reception power information of the entire generated initial reception power map. For example, the reception power information of the initial reception power map of FIG. 12 is corrected using the reception power information of observation points M1 and M2 of FIG. 13, and a corrected reception power map such as that shown in FIG. 14 is generated. The reception power map generation unit 130 outputs this corrected reception power map as a reception power map for display. Furthermore, steps S123-S124 may be repeated periodically during operation to update the displayed reception power map as needed.

[0057] For example, the received power map generator 130 corrects the received power at each point using a power prediction model that predicts the received power at the target point from the received power at two input points. The power prediction model is a model that represents the relationship between the received power at the two input points and the received power at the target point, and is expressed by the following equation (1). In formula (1), y ｐ１ is the received power at the first input point, y ｐ２ is the received power at the second input point, y ｐ（ｘ） is the received power at the target point x, W ｐ（ｘ） is the y at the target point x ｐ１ and y ｐ２ and y ｐ（ｘ） is a weight (relationship parameter) that represents the relationship between

[0058] First, the received power map generating unit 130 obtains the received power at each point from the generated initial received power map, and calculates the weight W ｐ（ｘ） The first input point and the second input point are the observation points M1 and M2 of the operational observation terminal 300, and in equation (1), y ｐ１ is the received power of the observation point M1 in the initial received power map, y ｐ２ is the received power of the observation point M2 in the initial received power map, y ｐ（ｘ） By inputting the received power of the target point x in the initial received power map intoｐ（ｘ） As a result, the weight W of each point in the entire initial received power map is calculated. ｐ（ｘ） Ask for.

[0059] Next, the received power map generating unit 130 predicts the received power at each point from the received power measured by the operation observation terminal 300 using equation (1). In equation (1), y ｐ１ and y ｐ２ The received power at observation points M1 and M2 measured by the operational observation terminal 300 is input to w ｐ（ｘ） By applying the weight of the target point x obtained to ｐ（ｘ） As a result, the predicted value y of the received power at each point in the entire initial received power map is calculated. ｐ（ｘ） is calculated, and the received power information of the initial received power map is corrected by this predicted value.

[0060] 9 , the operation management server 100 then estimates the cause of degradation of communication quality based on the received power information (S130). When a received power map for display has been generated, the degradation factor estimation unit 140 inputs the received power information at each point on the generated received power map to the degradation factor estimation model 141, and estimates the cause of degradation of communication quality at each point. Furthermore, when received power information has been acquired from the application terminal 400, the degradation factor estimation unit 140 inputs the acquired received power information to the degradation factor estimation model 141, and estimates the cause of degradation of communication quality of the application terminal 400.

[0061] Next, the operation management server 100 estimates the impact of each degradation factor on communication quality based on the received power information (S140). When a received power map for display has been generated, the impact estimation unit 150 estimates an intermediate index for each point by inputting the received power information for each point on the generated received power map into the intermediate index estimation model 151, and further estimates the degree of degradation of communication quality at each point by inputting the estimated intermediate index for each point into a predetermined conversion function. Also, when received power information has been acquired from the application terminal 400, the impact estimation unit 150 estimates an intermediate index by inputting the acquired received power information into the intermediate index estimation model 151, and further estimates the degree of degradation of communication quality of the application terminal 400 by inputting the estimated intermediate index into the predetermined conversion function.

[0062] Next, the operation management server 100 displays the operation management screen (S150). The display unit 160 displays, on the operation management screen, the generated reception power map for the predetermined area, the factors of degradation of communication quality estimated for the predetermined area, and the degree of impact on communication quality of each factor of degradation estimated for the predetermined area.

[0063] FIG. 15 shows an example of an operation management screen displayed by the display unit 160. In the example of FIG. 15, the operation management screen 600 includes a received power map screen 610. As shown in FIG. 15, the display unit 160 displays the generated received power map for display on the received power map screen 610 of the operation management screen 600. This makes it possible to display in real time the received power distribution of a floor estimated from the received power measured at an observation point. For example, a floor map may be displayed on the received power map screen 610, and the generated received power map may be displayed on the floor map. The floor map may be a map showing the positions and shapes of objects placed on the floor, or may be a photographed image of the floor. The received power map may be displayed as a heat map corresponding to the received power of each point, or may be displayed using contour lines indicating the received power. When displayed as a heat map, the color or hatching pattern of each point may be changed depending on the received power. Furthermore, in the received power map, areas where the received power is lower than a predetermined threshold may be highlighted using a color or hatching pattern.

[0064] Furthermore, the display unit 160 displays the estimated degradation factors of communication quality at each point on the reception power map in a distinguishable manner. This makes it possible to simultaneously display the reception power distribution of the floor and the degradation factors of communication quality in real time. For example, as shown in FIG. 15 , the degradation factors of shielding, fading, and distance attenuation are displayed with different icons at each point on the reception power map. The type and shape of the icon may not be limited, and the color, size, etc. of the icon may be changed for each degradation factor. Instead of icons, the text of the degradation factors "shielding," "fading," and "distance attenuation" may be displayed at each point. Furthermore, the degradation factors may be displayed in a distinguishable manner for each point on the reception power map, or for each area including points with the same estimated degradation factor.

[0065] Furthermore, the display unit 160 displays the degree of degradation (impact) of communication quality estimated at each point on the reception power map in a distinguishable manner. This allows the reception power distribution of the floor and the degree of degradation of communication quality to be displayed simultaneously in real time. For example, as shown in FIG. 15 , the color of an icon indicating a degradation factor at each point on the reception power map may be changed depending on the level of degradation (weak, medium, or strong). The type, shape, size, etc. of the icon may be changed depending on the degree of degradation, not limited to the color of the icon. The icon may be highlighted using color or other means as the degree of degradation increases. The highlighting method is not limited to, but may include, for example, blinking the icon, alternating icons of different sizes, changing the background color of the icon, or adding another icon such as an exclamation mark to the icon indicating the degradation factor. Furthermore, the degree of degradation at each point on the reception power map may be displayed using an icon other than the icon indicating the degradation factor. The displayed degree of degradation may be the sum of the degrees of degradation of each estimated degradation factor, or the degree of degradation of the degradation factor with the greatest degree of degradation. The intensity of the degree of degradation is not limited to three levels, weak, medium, and strong, and the icon display may be changed according to any number of levels.In addition to icons, characters indicating the estimated level of the degree of degradation or the value of the degree of degradation (such as the amount of degradation) may be displayed at each point.In addition, the degree of degradation may be displayed so as to be distinguishable for each point on the received power map, or so as to be distinguishable for each area including points with the same level of estimated degree of degradation.

[0066] Furthermore, when wireless information including location information is acquired from the application terminal 400, the display unit 160 displays the location of the application terminal 400 in an identifiable manner on a reception power map. This allows the current location where the application terminal 400 is operating to be ascertained on a map that displays the reception power distribution, degradation factors, and degradation degree. For example, as shown in FIG. 15 , an icon representing the application terminal 400 is displayed at a position corresponding to the location information acquired on the reception power map. When multiple application terminals 400 are displayed, each application terminal 400 may be displayed in an identifiable manner. For example, the identification number of each application terminal 400 may be displayed on the icon of the application terminal 400, or the color or type of the icon may be different for each application terminal 400. The icon of the application terminal 400 may display the reception power acquired from the terminal, the degradation factor estimated from the reception power, and the degradation degree. The type, color, size, etc. of the icon may be changed depending on the reception power, degradation factor, and degradation degree. Instead of an icon, the reception power value, text indicating the degradation factor, the degradation degree value, etc. may also be displayed. In addition, a past movement trajectory (movement route) may be displayed along with the icon of the application terminal 400 according to the location information of the application terminal 400. The movement trajectory may include a future movement route based on information indicating an operation plan or design. The information indicating an operation plan or design may be acquired from an operation management database, etc. The movement trajectory may be displayed as a trajectory line indicating the movement trajectory, or icons of multiple terminals may be displayed along the movement trajectory. The received power acquired from the terminal, and the degradation factors and degradation degree estimated from the received power may be displayed on the movement trajectory. Note that the operator may be able to select the items to be displayed on the received power map screen 610. For example, only selected information from the floor map, received power map, degradation factors, degradation degree, and application terminal may be displayed on the received power map screen 610. For example, only the received power map and degradation factors may be displayed, or only the received power map and application terminal may be displayed. Furthermore, only information on a selected degradation factor from multiple degradation factors may be displayed, or only information on a selected application terminal from multiple application terminals may be displayed.

[0067] Furthermore, the display unit 160 may display the estimated degree of degradation of communication quality on a screen separate from the received power map screen 610. Using a separate screen allows for more detailed information to be displayed. For example, as shown in FIG. 16 , the degree of degradation of communication quality for each degradation factor may be displayed on a dashboard screen 611 separate from the received power map screen 610. For example, when an operator performs a selection operation, such as clicking, on an icon indicating a degradation factor displayed on the received power map screen 610, the dashboard screen 611 may be displayed, and the estimated degree of degradation may be displayed at the position of the selected icon. The position selected by the operator is any point on the received power map, and may be the position where an icon for the degradation factor is displayed, or the position where an icon for the application terminal 400 is displayed. To enable the user to recognize the relationship between the selected position on the received power map screen 610 and the dashboard screen 611, for example, a line or arrow may be displayed connecting the selected position on the received power map screen 610 and the dashboard screen 611, the dashboard screen 611 may be displayed in a balloon from the selected position on the received power map screen 610, or information about the selected position on the received power map screen 610 may be displayed on the dashboard screen 611. In the example of FIG. 16 , the dashboard screen 611 is displayed on the right side of the received power map screen 610. However, the dashboard screen 611 may not be displayed on the right side, but may be displayed at any position around the received power map screen 610 (left side, upper side, lower side, etc.). The dashboard screen 611 may be displayed so that part or all of it overlaps with the received power map screen 610. The dashboard screen 611 is an example of a screen that displays detailed information about the degree of degradation, and may be a pop-up of any shape or size. For example, as shown in FIG. 16 , the dashboard screen 611 displays the degree of degradation (e.g., the amount of decrease in throughput) of communication quality for each estimated degradation factor in a bar graph. The display is not limited to a bar graph, and other types of graphs may be used, or values ​​of the degree of degradation may be displayed. For example, the degradation factor with the greatest degree of degradation or a degradation factor with a degree of degradation greater than a predetermined threshold may be highlighted by changing the color or hatching pattern of the graph. Furthermore, the change over time in the degree of degradation of communication quality for each degradation factor may be displayed using a line graph or the like.Furthermore, the relative relationship of the deterioration amount due to the deterioration factor may be illustrated by a pie chart.

[0068] Fig. 17 shows another example of the operation management screen displayed by the display unit 160. In the example of Fig. 17, the operation management screen 600 includes a terminal management screen 620 in addition to a received power map screen 610. The display unit 160 displays the status of the application terminal 400 on the terminal management screen 620 of the operation management screen 600. As shown in Fig. 17, for example, the terminal management screen 620 displays a list of the operating status, wireless quality, communication quality, communication quality degradation alerts, countermeasure status, etc. of each terminal. This makes it possible to grasp the current status of each application terminal 400 in real time.

[0069] The operating status displayed on the terminal management screen 620 may be, for example, "moving" or "stopped." The display unit 160 may determine whether the terminal is operating or stopped based on location information acquired from the application terminal 400 and display the determination result. The wireless quality displayed on the terminal management screen 620 may be, for example, a received power level, such as "good," "fair," or "bad." The received power may be displayed at any number of levels, not limited to three levels, or the received power value may be displayed. The display unit 160 may determine the received power level based on received power information acquired from the application terminal 400 and display the determination result. The received power level may be determined based on a preset range of received power values ​​for each level, or a range of values ​​for each level may be selected depending on the type or operation of the application terminal 400 and determined based on the selected range of values ​​for each level. The communication quality displayed on the terminal management screen 620 may be, for example, a throughput level, such as "good," "fair," or "bad." The throughput may be displayed at any number of levels, not limited to three, or at any number of levels, or the throughput value may be displayed. The display unit 160 may determine the throughput level based on the throughput estimated from the received power information acquired from the application terminal 400, and display the determination result. As with the received power level, the throughput level may be determined based on a preset range of throughput values ​​for each level, or a range of values ​​for each level may be selected depending on the type or operation type of the application terminal 400, and the throughput level may be determined based on the selected range of values ​​for each level. The communication quality degradation alert displayed on the terminal management screen 620 may include, for example, the cause and degree of degradation of communication quality. As with the display of the received power map screen 610, the display unit 160 may change the icon or the color of the icon depending on the cause and degree of degradation estimated from the received power information acquired from the application terminal 400. The communication quality degradation alert may be highlighted depending on the cause and degree of degradation.The highlighting may be, for example, red text (or another color) indicating the cause or degree of degradation of communication quality, a red frame (or another color) surrounding an icon or text, or a flashing icon or text. Furthermore, on the reception power map screen 610, in addition to the icon of the application terminal 400, an icon or red text corresponding to the cause or degree of degradation may be displayed, or a red frame surrounding the icon or text may be displayed. Furthermore, if the degree of degradation is equal to or greater than a predetermined value, a pop-up indicating an alert may be displayed separately from the terminal management screen 620, or an alert sound may be output in addition to the screen display. The countermeasure status displayed on the terminal management screen 620 may be, for example, the current status of the terminal with poor communication quality. The display unit 160 may, for example, acquire location information or information indicating the current status from the application terminal 400 and display a status such as operating at a low speed or changing the travel route. The operator may be able to select whether or not to display the terminal management screen 620 on the operation management screen 600. Furthermore, when displaying the terminal management screen 620, the operator may be able to select the items to be displayed on the terminal management screen 620. For example, only selected information from the operation status, wireless quality, communication quality, communication quality degradation alert, and countermeasure status may be displayed on the terminal management screen 620. For example, only the operation status and communication quality may be displayed, or only the operation status and communication quality degradation alert may be displayed. Furthermore, only information on a selected application terminal from among multiple application terminals may be displayed.

[0070] FIG. 18 shows another example of an operation management screen displayed by the display unit 160. In the example of FIG. 18, the operation management screen 600 includes a graph screen 630 in addition to a received power map screen 610 and a terminal management screen 620. The display unit 160 displays temporal changes in the status of the application terminal 400 and the network on the graph screen 630. As shown in FIG. 18, for example, the graph screen 630 displays wireless quality, communication quality, network load information, and the like. This makes it possible to grasp temporal changes in the quality and resources of the entire network in the target wireless communication environment. Note that FIG. 18 merely illustrates an example of the display image of each graph and is not intended to specify the values, units, etc. of each axis.

[0071] The wireless quality displayed on the graph screen 630 is, for example, the received power of the application terminal 400. The vertical axis of the wireless quality graph indicates the relative strength of the received power on a scale of 100. The display unit 160 may plot the received power information acquired from the application terminal 400 in time series and display the change in the received power as a line graph. The display is not limited to a line graph, and other types of graphs may be used, or the received power values ​​may be displayed in time series. The received power of one application terminal 400 may be displayed, or the received powers of multiple application terminals 400 may be displayed overlapping each other. The communication quality displayed on the graph screen 630 is, for example, the throughput of the application terminal 400. The vertical axis of the communication quality graph indicates throughput (e.g., Mbps). The display unit 160 may plot the throughput estimated from the received power information acquired from the application terminal 400 in time series and display the change in throughput as a line graph. The display is not limited to a line graph, and other types of graphs may be used, or the throughput values ​​may be displayed in time series. The throughput of one application terminal 400 may be displayed, or the throughputs of multiple application terminals 400 may be displayed overlapping each other. The network load status displayed on the graph screen 630 may be, for example, the wireless resource usage rate of the entire network. The vertical axis of the network load status graph indicates the wireless resource usage rate (e.g., percentage). The display unit 160 may, for example, acquire and display the resource allocation status from a base station in the target wireless communication environment. In the example of the graph screen 630 of FIG. 18 , at time t1, wireless quality deteriorates, communication quality deteriorates, and the network load increases. For example, at time t1, it can be seen that the wireless quality environment is so poor that increasing the allocation of wireless resources does not improve the communication quality. Note that the operator may be able to select whether or not to display the graph screen 630 on the operation management screen 600. Furthermore, when the graph screen 630 is displayed, the operator may be able to select the items to display on the graph screen 630. For example, only selected information from wireless quality, communication quality, and network load status may be displayed on the graph screen 630.For example, only the wireless quality and communication quality may be displayed, or only the network load state may be displayed. Only the wireless quality or communication quality of a selected application terminal from among multiple application terminals may be displayed. A period for displaying the wireless quality, communication quality, and network load state in graphs may be selected.

[0072] Fig. 19 shows another example of an operation management screen displayed by the display unit 160. In the example of Fig. 19, the operation management screen 600 includes an application management screen 640 in addition to a received power map screen 610, a terminal management screen 620, and a graph screen 630. The display unit 160 displays the operating status of the application terminal 400 on the application management screen 640. As shown in Fig. 19, for example, the application management screen 640 displays package pick up speed (Package pick up / s), down time, terminals, root cause, etc. This makes it possible to grasp the operating status of the entire system provided by the application terminal 400.

[0073] The package transport speed displayed on the application management screen 640 is, for example, the transport speed of the packages by all application terminals 400 when the application terminals 400 are AGVs transporting packages. The display unit 160 may acquire information indicating the package transport status from all application terminals 400 and display the transport speed calculated from the acquired transport status. The downtime displayed on the application management screen 640 is, for example, the time during which the application terminals 400 are stopped due to degradation of wireless quality or the like. The percentage of stopped application terminals or the number of stopped application terminals may be displayed. The display unit 160 may acquire information indicating the operating status from all application terminals 400 and display the downtime calculated from the acquired operating status. The terminals displayed on the application management screen 640 are, for example, the number of application terminals 400 accommodated in the system. The route causes displayed on the application management screen 640 are, for example, the number of failures occurring in the application terminals 400. For example, the number of terminals with poor wireless quality or poor communication quality may be displayed based on received power information acquired from all application terminals 400. The operator may be able to select whether or not to display the application management screen 640 on the operation management screen 600. Furthermore, when the application management screen 640 is displayed, the operator may be able to select the items to be displayed on the application management screen 640. For example, only selected information from the package transport speed, downtime, terminal, and route cause may be displayed on the application management screen 640. For example, only the package transport speed and terminal may be displayed, or only the downtime and route cause may be displayed.

[0074] As described above, in this embodiment, a received power map showing the distribution of received power is displayed on the operation and management screen, and further, factors of communication quality degradation estimated from the received power and the impact of each degradation factor on communication quality are superimposed on the received power map. This allows the operator to grasp at a glance the received power at each point, as well as the factors of communication quality degradation at each point and the impact of each degradation factor on communication quality. For example, an operator can consider the necessity of countermeasures and the policy for countermeasures based on the received power and factors of communication quality degradation at each point identified from the map. Furthermore, the impact of each degradation factor on communication quality can be considered in more detail. Displaying the degradation factors at each point on the received power map allows the operator to understand which degradation factor is causing communication quality degradation at each point, whether multiple degradation factors are causing communication quality degradation, and what degradation factors exist at surrounding points. This allows the operator to specifically consider countermeasures for each point where communication quality is degraded. Furthermore, displaying the impact of each degradation factor on communication quality allows the operator to understand which degradation factor has the greatest impact, thereby enabling more effective countermeasures to be implemented. Furthermore, by displaying a received power map screen, terminal management screen, etc. on the operation management screen, it is possible to provide information necessary for considering countermeasures, and by allowing the operator to select the information they need, it is possible to effectively provide information appropriate for each site.

[0075] (Embodiment 2) Next, embodiment 2 will be described. In this embodiment, an example will be described in which factors of degradation of communication quality are superimposed on a throughput map. Note that this embodiment can be implemented in combination with embodiment 1, and each configuration shown in embodiment 1 may be used as appropriate.

[0076] Fig. 20 shows a configuration example of an operation management server 100 according to this embodiment. As shown in Fig. 20, the operation management server 100 according to this embodiment includes a throughput map generator 131 instead of the received power map generator 130 of embodiment 1. The other configurations are the same as those of embodiment 1.

[0077] The throughput map generation unit 131 generates a throughput map showing the distribution of throughput in a predetermined area based on the wireless information received by the wireless information receiving unit 110 from each terminal and stored in the wireless information storage unit 120. In addition to the throughput map, a communication quality map showing the distribution of delay or other communication qualities may also be generated. For example, the throughput map generation unit 131 may estimate the throughput from received power information included in the wireless information and generate the throughput map based on the estimated throughput, or may generate the throughput map by measuring the throughput at each terminal and acquiring the measured throughput from each terminal. The method for generating the throughput map is the same as the method for generating the received power map in the first embodiment. For example, the throughput map generation unit 131 may generate the throughput map based on wireless information acquired from any of the initial measurement terminal 200, the operation observation terminal 300, and the application terminal 400, or may generate the throughput map based on wireless information acquired from each terminal.

[0078] 21 shows an example of the operation of the operation management server 100 according to this embodiment. As shown in FIG. 21 , the operation management server 100 acquires radio information from each terminal, as in the first embodiment (S110). Each terminal may measure received power and transmit radio information including the measured received power information and location information to the operation management server 100. Furthermore, each terminal may measure received power and throughput and transmit radio information including the measured received power information, throughput information, and location information to the operation management server 100. The radio information receiving unit 110 acquires radio information including received power information and location information, or radio information including received power information, throughput information, and location information, from each terminal.

[0079] Next, the operation management server 100 generates a throughput map from the acquired radio information (S121). As in FIG. 10 of the first embodiment, the throughput map generation unit 131 acquires radio information from the initial measurement terminal 200 before operation and generates an initial throughput map based on the radio information acquired from the initial measurement terminal 200. The throughput map generation unit 131 generates the initial throughput map based on throughput information estimated from received power information included in the radio information or based on the throughput information included in the radio information. Furthermore, during operation, the throughput map generation unit 131 acquires radio information from the operation and observation terminal 300 and corrects the initial throughput map based on the radio information acquired from the operation and observation terminal 300. As in the first embodiment, the throughput map generation unit 131 corrects the throughput information of the initial throughput map from the throughput information of the two observation points using equation (1).

[0080] Next, as in embodiment 1, the operation management server 100 estimates the factors that cause degradation of communication quality based on the received power information included in the wireless information (S130), and estimates the impact of each degradation factor on communication quality based on the received power information included in the wireless information (S140).

[0081] Next, the operation management server 100 displays the operation management screen (S150). The display unit 160 displays, on the operation management screen, the generated throughput map for the predetermined area, the factors of degradation of communication quality estimated for the predetermined area, and the degree of impact on communication quality of each factor of degradation estimated for the predetermined area.

[0082] Fig. 22 shows a display example of an operation management screen according to this embodiment. In the example of Fig. 22, the operation management screen 600 includes a throughput map screen 612. As in the first embodiment, the operation management screen 600 may include, in addition to the throughput map screen 612, a terminal management screen 620, a graph screen 630, and an application management screen 640.

[0083] As shown in FIG. 22 , the display unit 160 displays the generated throughput map on a throughput map screen 612 of the operation management screen 600. As in the first embodiment, for example, a floor map may be displayed on the throughput map screen 612, and the generated throughput map may be displayed on the floor map. The throughput map may be displayed as a heat map corresponding to the throughput at each point, or may be displayed using contour lines indicating the throughput. Note that the operator may be able to select whether to display the throughput map screen 612 of this embodiment or the received power map screen 610 of the first embodiment on the operation management screen 600.

[0084] Furthermore, the display unit 160 identifiably displays the estimated factors of degradation of communication quality at each point on the throughput map, and identifiably displays the degree of degradation (impact) on communication quality estimated at each point on the throughput map, as in embodiment 1. The method of displaying the factors of degradation of communication quality and the method of displaying the degree of degradation on communication quality are the same as in embodiment 1. The display method of the application terminal 400 and the like is also the same as in embodiment 1.

[0085] As described above, in this embodiment, a throughput map showing the distribution of throughput is displayed on the operation management screen, and further, factors causing degradation of communication quality estimated from received power and the degree of impact of each degradation factor on communication quality are superimposed on the throughput map. As in the first embodiment, this makes it possible to grasp at a glance not only the throughput at each point, but also the factors causing degradation of communication quality at each point and the degree of impact of each degradation factor on communication quality.

[0086] The present disclosure is not limited to the above-described embodiments and may be modified as appropriate without departing from the spirit of the present disclosure. For example, the received power map may be generated based on not only the received power measured by the terminal but also the received power calculated by simulation or the like, or based on both the received power measured by the terminal and the received power calculated by simulation or the like. Simulation, estimation, etc. may also be included in the throughput and delay.

[0087] Each component in the above-described embodiments may be configured with hardware or software, or both, and may be configured with a single piece of hardware or software, or may be configured with multiple pieces of hardware or software. Each device, including the operation management server and terminal, and each function (processing) may be realized by a computer 30 having a processor 31 such as a CPU (Central Processing Unit) and a memory 32 serving as a storage device, as shown in FIG. 23. For example, a program for performing the method (display method) in the embodiment may be stored in the memory 32, and each function may be realized by the processor 31 executing the program stored in the memory 32.

[0088] These programs include instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more functions described in the embodiments. The programs may be stored on a non-transitory computer-readable medium or a tangible storage medium. By way of example and not limitation, computer-readable media or tangible storage media include random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD) or other memory technology, CD-ROM, digital versatile disc (DVD), Blu-ray disc or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device. The programs may also be transmitted on a transitory computer-readable medium or communication medium. By way of example and not limitation, transitory computer-readable media or communication media include electrical, optical, acoustic, or other forms of propagated signals.

[0089] Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure.

[0090] Some or all of the above embodiments can be described as, but are not limited to, the following supplementary notes. (Supplementary Note 1) A display system comprising: a generation unit that generates a wireless communication quality map showing a wireless communication quality distribution in a target space based on wireless communication quality information related to wireless communication quality in the target space; an estimation unit that estimates a degradation factor of communication quality in the target space based on the wireless communication quality information; and a display unit that generates display information for superimposing and displaying the estimated degradation factor of communication quality on the generated wireless communication quality map. (Supplementary Note 2) The display system according to Supplementary Note 1, wherein the estimation unit estimates a degree of degradation of communication quality for each degradation factor in the target space based on the wireless communication quality information, and the display unit generates the display information for further displaying the estimated degree of degradation. (Supplementary Note 3) The display system according to Supplementary Note 2, wherein the display unit generates the display information for displaying the estimated degree of degradation in association with the wireless communication quality map. (Supplementary Note 4) The display system according to any one of Supplements 1 to 3, wherein the wireless communication quality information includes wireless quality information indicating wireless quality, the generation means generates a wireless quality map indicating wireless quality distribution based on the wireless quality information, and the display means generates the display information for displaying the generated wireless quality map. (Supplementary Note 5) The display system according to any one of Supplements 1 to 3, wherein the wireless communication quality information includes communication quality information indicating communication quality, the generation means generates a communication quality map indicating communication quality distribution based on the communication quality information, and the display means generates the display information for displaying the generated communication quality map. (Supplementary Note 6) The display system according to any one of Supplements 1 to 5, wherein the generation means generates a first wireless communication quality map based on wireless communication quality information measured at a plurality of points in the target space, and corrects the first wireless communication quality map based on wireless communication quality information of the target space estimated from wireless communication quality information measured at at least two points in the target space.(Supplementary Note 7) A display device comprising: a generating means for generating a wireless communication quality map showing a wireless communication quality distribution in a target space based on wireless communication quality information related to wireless communication quality in the target space, an estimating means for estimating a degradation factor of communication quality in the target space based on the wireless communication quality information, and a display means for generating display information for superimposing and displaying the estimated degradation factor of communication quality on the generated wireless communication quality map. (Supplementary Note 8) The display device according to Supplementary Note 7, wherein the estimating means estimates a degree of degradation of communication quality for each degradation factor in the target space based on the wireless communication quality information, and the display means generates the display information for further displaying the estimated degree of degradation. (Supplementary Note 9) The display device according to Supplementary Note 8, wherein the display means generates the display information for displaying the estimated degree of degradation in association with the wireless communication quality map. (Supplementary Note 10) The display device according to any one of Supplementary Notes 7 to 9, wherein the wireless communication quality information includes wireless quality information indicating wireless quality, the generation means generates a wireless quality map indicating wireless quality distribution based on the wireless quality information, and the display means generates the display information for displaying the generated wireless quality map. (Supplementary Note 11) The display device according to any one of Supplementary Notes 7 to 9, wherein the wireless communication quality information includes communication quality information indicating communication quality, the generation means generates a communication quality map indicating communication quality distribution based on the communication quality information, and the display means generates the display information for displaying the generated communication quality map. (Supplementary Note 12) The display device according to any one of Supplementary Notes 7 to 11, wherein the generation means generates a first wireless communication quality map based on wireless communication quality information measured at a plurality of points in the target space, and corrects the first wireless communication quality map based on wireless communication quality information of the target space estimated from wireless communication quality information measured at at least two points in the target space.(Supplementary Note 13) A display method comprising: generating a wireless communication quality map indicating a wireless communication quality distribution in a target space based on wireless communication quality information regarding wireless communication quality in the target space; estimating a factor of degradation of communication quality in the target space based on the wireless communication quality information; and generating display information for superimposing and displaying the estimated factor of degradation of communication quality on the generated wireless communication quality map. (Supplementary Note 14) The display method according to Supplementary Note 13, estimating a degree of degradation of communication quality for each degradation factor in the target space based on the wireless communication quality information, and generating the display information for further displaying the estimated degree of degradation. (Supplementary Note 15) The display method according to Supplementary Note 14, generating the display information for displaying the estimated degree of degradation in association with the wireless communication quality map. (Supplementary Note 16) The display method according to any one of Supplements 13 to 15, wherein the wireless communication quality information includes wireless quality information indicating wireless quality, generating a wireless quality map indicating a wireless quality distribution based on the wireless quality information, and generating the display information for displaying the generated wireless quality map. (Supplementary Note 17) The display method according to any one of Supplementary Notes 13 to 15, wherein the wireless communication quality information includes communication quality information indicating communication quality, generating a communication quality map indicating a communication quality distribution based on the communication quality information, and generating the display information for displaying the generated communication quality map. (Supplementary Note 18) The display method according to any one of Supplementary Notes 13 to 17, wherein a first wireless communication quality map is generated based on wireless communication quality information measured at a plurality of points in the target space, and the first wireless communication quality map is corrected based on wireless communication quality information of the target space estimated from wireless communication quality information measured at at least two points in the target space.

[0091] 1 Operation management system 10 Display system 11 Generation unit 12 Estimation unit 13 Display unit 20 Display device 30 Computer 31 Processor 32 Memory 100 Operation management server 110 Wireless information receiving unit 120 Wireless information storage unit 130 Received power map generating unit 131 Throughput map generating unit 140 Degradation factor estimation unit 141 Degradation factor estimation model 150 Influence estimation unit 151 Intermediate index estimation model 160 Display unit 200 Initial measurement terminal 210 Wireless information transmission function 211 Received power measurement unit 212 Position detection unit 213 Wireless information transmission unit 300 Operation observation terminal 400 Application terminal 500 Base station 600 Operation management screen 610 Received power map screen 611 Dashboard screen 612 Throughput map screen 620 Terminal management screen 630 Graph screen 640 Application management screen

Claims

1. a generating means for generating a wireless communication quality map indicating a wireless communication quality distribution in a target space based on wireless communication quality information regarding wireless communication quality in the target space; an estimation means for estimating a cause of deterioration of communication quality in the target space based on the wireless communication quality information; a display unit that generates display information for superimposing the estimated cause of deterioration of communication quality on the generated wireless communication quality map; A display system comprising:

2. the estimation means estimates a degree of degradation of communication quality for each degradation factor in the target space based on the wireless communication quality information; the display means generates the display information for further displaying the estimated degree of deterioration. The display system of claim 1 .

3. the display means generates the display information for displaying the estimated degree of deterioration in association with the wireless communication quality map. The display system of claim 2 .

4. the wireless communication quality information includes wireless quality information indicating wireless quality, the generating means generates a wireless quality map indicating a wireless quality distribution based on the wireless quality information; the display means generates the display information for displaying the generated wireless quality map. A display system according to any one of claims 1 to 3.

5. the wireless communication quality information includes communication quality information indicating communication quality, the generating means generates a communication quality map indicating a communication quality distribution based on the communication quality information; the display means generates the display information for displaying the generated communication quality map. A display system according to any one of claims 1 to 3.

6. the generating means generates a first wireless communication quality map based on wireless communication quality information measured at a plurality of points in the target space, and corrects the first wireless communication quality map based on wireless communication quality information of the target space estimated from wireless communication quality information measured at at least two points in the target space. A display system according to any one of claims 1 to 3.

7. a generating means for generating a wireless communication quality map indicating a wireless communication quality distribution in a target space based on wireless communication quality information regarding wireless communication quality in the target space; an estimation means for estimating a cause of deterioration of communication quality in the target space based on the wireless communication quality information; a display unit that generates display information for superimposing the estimated cause of deterioration of communication quality on the generated wireless communication quality map; A display device comprising:

8. the estimation means estimates a degree of degradation of communication quality for each degradation factor in the target space based on the wireless communication quality information; the display means generates the display information for further displaying the estimated degree of deterioration. The display device according to claim 7 .

9. generating a wireless communication quality map indicating a wireless communication quality distribution in the target space based on wireless communication quality information regarding wireless communication quality in the target space; estimating a cause of deterioration of communication quality in the target space based on the wireless communication quality information; generating display information for superimposing the estimated cause of deterioration of communication quality on the generated wireless communication quality map; Display method.

10. A wireless communication quality map showing a wireless communication quality distribution in a target space is generated based on wireless communication quality information regarding wireless communication quality in the target space; estimating a cause of deterioration of communication quality in the target space based on the wireless communication quality information; generating display information for superimposing the estimated cause of deterioration of communication quality on the generated wireless communication quality map; A program that causes a computer to execute a process.