JP2018125575A - Wireless network situation estimation device, wireless network situation estimation method, wireless network situation estimation program and wireless network situation estimation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless network situation estimation device capable of estimating the situation of a wireless network for each area, even when the communication situation changes due to large audience gathering for an event, or the like.SOLUTION: A wireless network situation estimation system 4 has a wireless network situation estimation device 103, and one or more wireless communication terminals 200A, 200B, ..., 200M existing in an object area and connected via a first wireless network 300. A wireless network situation estimation device 100 includes an information collection unit 180 for collecting positional information of the one or more wireless communication terminals 200A, 200B, ..., 200M and communication situation information of the first wireless network 300, and a network situation estimation unit 140 for estimating the wireless network situation of subareas by using the number of communication terminals estimated from the positional information and the collected number of communication terminals estimated from the positional information, for the subareas in the object area.SELECTED DRAWING: Figure 19

Description

  The present invention relates to a radio network situation estimation apparatus, a radio network situation estimation method, a radio network situation estimation program, and a radio network situation estimation system that estimate throughput performance of a radio network.

  In recent years, the threat of terrorism, incidents or accidents in events such as events and events has increased, and security in such events has been strengthened year by year. For example, in public organizations such as police and fire departments, and security companies, when conducting security operations at events and events, and when disasters, incidents, accidents, etc. occur, the situation of the site is grasped and suspicious Security operations such as detection of persons and suspicious objects are being advanced. In the advancement of such security operations, in addition to pre-installed surveillance cameras, video taken by wearable cameras possessed by surveillance cameras temporarily installed at the event and on-site police officers, security guards, etc. are utilized. Is done. Efforts such as the construction of a self-employed network for temporary video distribution and the use of a mobile carrier network have been made to distribute video used for such business. In the future, construction of LTE (Long Term Evolution) for the public is being studied. Public LTE is also referred to as PS-LTE (Public Safety LTE).

  In order to utilize video analysis technology for the advancement of security operations, high-quality video is required. In order to grasp the situation of the site at the time of occurrence of a disaster, an incident, an accident, etc., or to detect a sign of an incident, an accident, an image of a place where the disaster, an incident, an accident, etc. may occur Need to get from before. For this purpose, a communication infrastructure is required for transmitting images from places where disasters, incidents, accidents, etc. may occur. However, the time and place where disasters, incidents, accidents, etc. occur cannot be predicted. Therefore, it is not realistic to build a large-capacity public communication infrastructure in advance in all places where disasters, incidents, accidents, etc. may occur. On the other hand, in surveillance cameras and wearable cameras that are temporarily provided at the time of an event, the use of a mobile carrier network (hereinafter referred to as a mobile network) is advancing due to its wide bandwidth and ease of introduction. However, it is assumed that many general users gather at the event. In such a congested environment, since general users also use the mobile network, the throughput of the mobile network may be reduced, and the quality of video to be distributed may be deteriorated. Similarly, there is also a method of utilizing a broadband and easy to introduce wireless LAN (Local Area Network) (also called Wi-Fi (registered trademark) (Wireless Fidelity)) for video distribution. When using a wireless LAN, for example, in order to construct a wireless LAN for video distribution for security services, the location of the wireless LAN access point in the event area should be secured to secure the bandwidth required for video distribution. It becomes important.

  Related techniques are disclosed in Patent Documents 1 and 2, for example. In the cell information providing method in the mobile communication system disclosed in Patent Document 1, the communication attribute information acquisition unit calls up a user area map including a position designated by the user and its surrounding area. The communication attribute information acquisition means acquires attribute information indicating the communication speed per mobile device and the availability of high-speed communication for each cell that covers a part or all of the user area. When the designated time point is a future time point, the communication attribute information acquiring unit predicts the recent communication speed rate performance in the time zone including the designated time point as the communication speed rate at the designated time point. The cell attribute map display processing means displays the cell range image RY indicating the range of each cell in a form that distinguishes the difference in the contents of the attribute information and overlaps the area map.

  In the network bandwidth control method disclosed in Patent Document 2, the NW control unit acquires both its own physical location information and identification information on the network from the information communication terminal, and transmits and receives data to and from the information communication terminal. Estimate the communication path to be carried. Then, the NW control unit estimates the communication band of the information communication terminal. Specifically, when an information communication terminal having a similar IP address (such as an IP address assigned to the same telecommunications carrier) approaches any area, the NW control unit, for example, records past history information. From this, the average communication band of the information communication terminals in the area of the same communication carrier as the approaching information communication terminal is specified. At this time, the NW control unit specifies the average communication band in the area of the same day of the week and the same time zone from the past history information based on the time zone. The NW control unit performs transmission control for the information communication terminal based on the estimated communication band.

JP 2008-160310 A JP 2012-244492 A

  However, in the mobile communication system of Patent Document 1, when the designated time point is a future time point, the actual communication speed rate for each cell in the user area in the time zone including the designated time point is the communication speed rate at the designated time point. It's just what you expect and get. The mobile communication system of Patent Document 1 does not estimate the state of a wireless network for each area in consideration of a change in communication state due to a large number of spectators gathering at an event.

  In addition, the network bandwidth control method of Patent Literature 2 specifies the average communication bandwidth in the same area on the same day of the week and the same time zone of the information communication terminal of the same communication carrier as the approaching information communication terminal from the past history information. It's just a thing. The network bandwidth control method of Patent Document 2 does not estimate the state of the wireless network for each area in consideration of changes in the communication state due to a large number of spectators gathering at the event.

  An object of the present invention is a wireless network situation in which the state of a wireless network can be estimated for each area even when a communication situation changes due to a sudden occurrence such as a large number of spectators gathering at an event or the like An object is to provide an estimation device.

  According to one aspect of the present invention, there is provided a wireless network status estimation device that includes location information of one or more wireless communication terminals that exist in a target area and are connected via a first wireless network, and communication status information of the first wireless network. A network status for estimating the radio network status of the sub-area using information collection means for collecting data, the number of communication terminals estimated from the location information for the sub-area in the target area, and the collected communication status information And estimating means.

  According to another aspect of the present invention, there is provided a wireless network status estimation method including location information of one or more wireless communication terminals that exist in a target area and are connected via a first wireless network, and the communication status of the first wireless network. Information is collected, and the wireless network status of the sub-area is estimated using the number of communication terminals estimated from the location information for the sub-area within the target area and the collected communication status information.

  According to still another aspect of the present invention, there is provided a wireless network status estimation program that includes location information of one or more wireless communication terminals that exist in a target area and are connected to a computer via a first wireless network, and the first wireless. Estimating the wireless network status of the sub-area using the process of collecting network communication status information, the number of communication terminals estimated from the location information for the sub-area in the target area, and the collected communication status information And processing to be executed.

  A wireless network state estimation system according to another aspect of the present invention includes a wireless network state estimation device and one or more wireless communication terminals that exist in a target area and are connected via a first wireless network. In the situation estimation system, the wireless network situation estimation device includes information collection means for collecting position information of the one or more wireless communication terminals and communication situation information of the first wireless network, sub-ranges in the target area Network status estimation means for estimating the radio network status of the sub-area using the number of communication terminals estimated from the location information for the area and the collected communication status information.

  According to the present invention, it is possible to estimate the status of a wireless network for each area in consideration of a change in communication status due to a sudden occurrence such as a large number of spectators gathering at an event.

It is a block diagram which shows the example of a structure of the wireless network condition estimation system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the example of a structure of the wireless network condition estimation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of the subarea in the radio | wireless network condition estimation system which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of a display of the network condition of the wireless network condition estimation system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the example of a structure of the network condition estimation part which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the example of a structure of the radio | wireless communication terminal which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the example of operation | movement of the wireless network condition estimation apparatus which concerns on the 1st Embodiment of this invention. 5 is a flowchart illustrating an example of the operation of the wireless communication terminal according to the first embodiment of the present invention. It is a block diagram which shows the example of a structure of the radio | wireless network condition estimation system which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the example of a structure of the wireless network condition estimation apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the example of a structure of the network condition estimation part which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the example of a structure of the radio | wireless communication terminal which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the example of operation | movement of the radio | wireless network condition estimation apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the example of operation | movement of the radio | wireless communication terminal which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the example of a structure of the radio | wireless network condition estimation system which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the example of a structure of the radio | wireless network condition estimation apparatus which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the example of a structure of the network condition estimation part which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows the example of operation | movement of the wireless network condition estimation apparatus which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the example of a structure of the wireless network condition estimation apparatus which concerns on the 4th Embodiment of this invention. It is a flowchart which shows the example of operation | movement of the wireless network condition estimation apparatus which concerns on the 4th Embodiment of this invention. It is a block diagram which shows the example of a structure of a computer which can implement | achieve the radio | wireless network condition estimation apparatus and radio | wireless communication terminal which concern on each embodiment of this invention.

<First Embodiment>
~Constitution~
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating an example of a configuration of a wireless network status estimation system 1 according to the first embodiment of this invention. The radio network status estimation system 1 includes a radio network status estimation device 100 and one or more radio communication terminals 200. The wireless network status estimation device 100 and the one or more wireless communication terminals 200 may be connected to each other via a first wireless network 300 that is a wireless communication network. In the example shown in FIG. 1, radio communication terminals 200A, 200B,... 200M are shown as examples of the radio communication terminal 200. The wireless communication terminals 200A, 200B,... 200M only need to include a common configuration shown as the configuration of the wireless communication terminal 200 described below. Hereinafter, the wireless communication terminals 200A, 200B,... 200M are collectively referred to as the wireless communication terminal 200.

  The wireless network status estimation device 100 has a wired communication function according to a standard such as Ethernet (registered trademark), and is connected to the first wireless communication network 300 by the wired communication function.

  The wireless communication terminal 200 has, for example, a wireless LAN (Local Area Network) function conforming to a Wi-Fi (abbreviation of wireless fidelity, registered trademark) standard, via a wireless access point (not shown) of the first wireless network 300. The wireless network status estimation apparatus 100 is communicably connected.

  Note that the radio network condition estimation device 100 may have a radio communication function including LTE, and may be connected to the first radio network 300 by the radio communication function. Some wireless communication terminals 200 may have a wired communication function, and may be connected to the first wireless network 300 by the wired communication function.

  FIG. 2 is a block diagram illustrating an example of the configuration of the wireless network status estimation apparatus according to the first embodiment. The wireless network status estimation apparatus 100 includes a first communication unit 110, a first control unit 120, an input / output unit 130, a network status estimation unit 140, and a storage unit 150.

  The first communication unit 110 receives various information (described later) transmitted from each wireless communication terminal 200 via the first wireless network 300 and outputs the received information to the first control unit 120. The first communication unit 110 may be realized by, for example, a processor controlled by an OS (Operating System) kernel and a communication interface that is communicably connected to the processor. In that case, the 1st communication part 110 should just perform processes, such as a process of a transport layer, a process of a network layer, and MAC (Media Access Control), for example. The transport layer processing is, for example, TCP (Transmission Control Protocol) or UDP (User Datagram Protocol) processing. The network layer process is, for example, an IP (Internet Protocol) process. The first communication unit 110 may be a communication module that performs communication in accordance with LTE or wireless LAN standards.

  The first control unit 120 and the network status estimation unit 140 may be realized by, for example, a CPU (Central Processing Unit) that executes processing by program control. Specifically, the first control unit 120 and the network status estimation unit 140 may be realized by a CPU that executes processing according to application software that operates based on an OS installed in the wireless network status estimation device 100, for example. Good. In other words, the CPU may operate as the first control unit 120 and the network status estimation unit 140 by executing a program loaded in the memory. The network situation estimation unit 140 may be implemented as a hardware engine such as a circuit for processing each function at high speed.

  When receiving various information transmitted from the wireless communication terminal 200 from the first communication unit 110, the first control unit 120 outputs them to the network status estimation unit 140. Here, the various information transmitted from the wireless communication terminal 200 includes information indicating the terminal position of each wireless communication terminal 200, a wireless LAN connection destination SSID (Service Set Identifier), a channel (frequency band), and maximum use. This is an available bandwidth indicating a possible bandwidth. The information indicating the terminal position is information on latitude and longitude acquired using, for example, GPS (Global Positioning System).

  In addition, the first control unit 120 has information (for example, latitude and longitude) of a security target area for estimating the network status from the input / output unit 130 or from the first communication unit 110 via the first wireless network 300. Is entered. The 1st control part 120 produces | generates the information of the area | region (this is called a subarea) which divided | segmented the inside of a guard object area by the predetermined magnitude | size. For example, the sub-area information may be generated by dividing the security target area. The first control unit 120 stores the generated subarea information in the storage unit 150.

FIG. 3 is a diagram illustrating an example of a sub-area obtained by dividing a security target area in the wireless network status estimation system according to the first embodiment. This sub-area is obtained by dividing the entire event venue, which is a security target area, into areas of a predetermined size. In the example of FIG. 3, the subarea is divided into a mesh shape with one side d [m], and each subarea has, for example, a _{i, j} (i = 0, 1,..., M, j = 0, 1,..., n) can be uniquely specified. Here, in this example, each subarea is uniquely specified by i and j, but one identifier may be assigned to each subarea for identification. Also, d [m] is preferably specified by a distance within a communicable range that can be covered by one wireless access point, for example. In addition, the black circle shown by the example of FIG. 3 can be displayed on a guard target area by the positional information received from each wireless communication terminal. Further, in FIG. 3, one side is a square with d [m], but it may be divided into circles with a radius d [m]. It can be handled as a sub-area. Further, the sub area may be divided so that there is no blank area that cannot be specified as the sub area in the security target area, and may be divided in various shapes.

  Further, the first control unit 120 reads the network status estimated by the network status estimation unit 140 from the storage unit 150. The input / output unit 130 includes a display unit as described later, and the first control unit 120 causes the input / output unit 130 to display the network status read from the storage unit 150. FIG. 4 is a diagram illustrating a display example of the network status of the wireless network status estimation system. The information to be displayed is the entire security target area shown in FIG. 3, and the first control unit 120 may display the network status of each sub-area on the input / output unit 130, for example, like a heat map. As shown in FIG. 4, the first control unit 120 may display a heat map indicating the network status with, for example, three levels of shading. In the three-level shading, for example, a sub-area where the throughput is lowered and the portable wireless access point should be moved or newly added to increase the network is dark gray. In addition, the sub-area that is estimated to be capable of video distribution with stable network conditions is light gray. As a matter of course, it is possible to arbitrarily set how many levels are used and how many colors are used. Not limited to this, the first control unit 120 may display the display information in any form as long as it is a display format that allows the administrator to grasp the network status. For example, the first control unit 120 may digitize the degree of network congestion estimated by the network situation estimation unit 140 and display the number in a form described in the sub-area. Further, the first control unit 120 may display an actual security area map and an aerial photograph in a superimposed manner. Further, the first control unit 120 may be able to switch the image to be displayed on the input / output unit 130 to an image indicating the position of each wireless communication terminal 200 instead of the network status as illustrated in FIG. In addition, the distribution of the number of communication terminals in each sub-area derived from the usable bandwidth of the wireless LAN calculated by the network condition estimation unit 140 (to be described later) and the estimated result of the movement of the wireless communication terminal 200 are calculated. It may be possible to switch to an image showing.

  The input / output unit 130 is realized by, for example, an output device that is provided in the wireless network status estimation device 100 and includes a display unit such as a display or a touch panel, and an input device such as a touch panel, a keyboard, a mouse, and a memory card reader. Is done. The input / output unit 130 may be provided in another device that is communicably connected to the wireless network status estimation device 100. The input / output unit 130 displays various types of information including the network status described above, for example, under the control of the first control unit 120. The input / output unit 130 further receives an instruction from the user. For example, the input / output unit 130 receives an instruction for presetting the size of the sub-area of the security target area.

  The network status estimation unit 140 receives information received from each wireless communication terminal 200 from the first control unit 120 and estimates the network status. FIG. 5 is a block diagram illustrating an example of the configuration of the network situation estimation unit in the present embodiment. The network situation estimation unit 140 includes a data extraction unit 141, a terminal location estimation unit 142, a terminal number distribution estimation unit 143, a first available bandwidth calculation unit 144, a first available bandwidth estimation unit 145, and a congestion situation estimation unit. 146. Note that the terminal location estimation unit 142, the terminal number distribution estimation unit 143, the first available bandwidth calculation unit 144, the first available bandwidth estimation unit 145, and the congestion status estimation unit 146 store the calculation results in the storage unit 150 of FIG. In addition, the calculation result stored in the storage unit 150 of FIG. 2 can be read out.

  The data extraction unit 141 extracts data to be input to the terminal position estimation unit 142 and the first available bandwidth calculation unit 144 from the information from each wireless communication terminal 200 received from the first control unit 120. Specifically, the data extraction unit 141 extracts information on the terminal position of the wireless communication terminal 200 and inputs the information to the terminal position estimation unit 142. In addition, the data extraction unit 141 inputs the terminal location information of the wireless communication terminal 200, the wireless LAN connection destination SSID, the channel, and the available bandwidth to the first available bandwidth calculation unit 144.

  The terminal position estimation unit 142 stores the position information of the wireless communication terminal 200 input from the data extraction unit 141 in the storage unit 150 and estimates a terminal position after T seconds set in advance. For example, assuming that the moving speed of the wireless communication terminal 200 is v [m / s], it is assumed that the wireless communication terminal 200 is located within an area having a radius vT [m] from the current position after T seconds. At this time, since it can be estimated that the wireless communication terminal is located in any of the sub-areas shown in FIG. 3 existing in a circle having a radius vT [m] from the current position, 1 exists in the circle. The value divided by the number of subareas is the probability that the wireless communication terminal exists in the subarea after T seconds. The terminal position estimation unit 142 calculates the existence probability after T seconds of the wireless communication terminal for all subareas, and stores the calculated probability in the storage unit 150.

  The above example is a very simple example. As another method for estimating the position of the wireless communication terminal after T seconds, for example, the past position information received from each wireless communication terminal and stored in the storage unit 150 is read from the storage unit 150. However, a method of estimating the position by calculating the movement speed v from the position information history (movement history) read for each wireless communication terminal and the movement history of each wireless communication terminal are read from the storage unit 150 and the movement pattern is analyzed. Then, there is a method for obtaining a sub-area that can be estimated to be located after T seconds. Furthermore, for such a terminal position estimation method, an existing technique may be used. The route in the area in charge of the security guard carrying the wireless communication terminal is preset in the storage unit 150, and the terminal position estimation unit 142 determines the terminal from the route of the security guard read from the storage unit 150 and the moving speed v. The position may be estimated.

  The terminal position estimation unit 142 calculates the probability that the wireless communication terminal is located in each sub-area after T seconds using any of the various position estimation methods as described above, and the presence of the wireless communication terminal The terminal number distribution estimation unit 143 is notified that the probability has been updated.

When the terminal number distribution estimation unit 143 receives notification from the terminal position estimation unit 142 that the existence probability of each subarea of the wireless communication terminal has been updated, the terminal number distribution estimation unit 143 estimates the number of wireless communication terminals after T seconds in each subarea. . For example, when the subarea of FIG. 3 is used, the number of communication terminals N _{i, j} (i = 0, 1,..., M _{, j} = 0, 1,... After T seconds). , N) can be estimated by the following equation (1).

Here, p _{i, j} ^k exists in subarea a _{i, j} (i = 0, 1,..., M, j = 0, 1,..., N) after T seconds from the wireless communication terminal k. Is the probability of p _{i, j} ^k is calculated by the terminal position estimation unit 142 and stored in the storage unit 150.

When the terminal number distribution estimation unit 143 reads the existence probabilities p _{i, j} ^k of all terminals from the storage unit 150 and estimates the number of communication terminals in each sub-area, the first available bandwidth indicates that the terminal number distribution has been updated. The estimation unit 145 is notified.

  The first available bandwidth calculation unit 144 specifies the subarea in which the wireless communication terminal currently exists from the position information of the wireless communication terminal input from the data extraction unit 141. The first available bandwidth calculation unit 144 causes the storage unit 150 to store the subarea in which the wireless communication terminal currently exists, together with the wireless LAN connection destination SSID, channel, and available bandwidth.

In addition, the first available bandwidth calculation unit 144 is a wireless communication in which the wireless LAN connection destination SSID and the channel are the same among all terminals existing in the same subarea as the wireless communication terminal currently exists. The available bandwidth of the terminal is read from the storage unit 150. The first available bandwidth calculation unit 144 calculates the average available bandwidth b _{i, j} ^{s, c} [Mbps] for each SSID and channel (i = 0, 1,..., M, j = 0, 1,... , N, s = SSID name, c = channel). The first available bandwidth calculation unit 144 stores the calculated average value of the available bandwidth of the subarea in the storage unit 150 and notifies the first available bandwidth estimation unit 145 that the average value of the available bandwidth has been updated. .

The first available bandwidth estimation unit 145 is an average value of the number of communication terminals N _{i, j in} each subarea, the SSID and the available bandwidth in each channel after T seconds from the terminal number distribution estimation unit 143 and the first available bandwidth calculation unit 144. When it is received that b _{i, j} ^{s, c} has been updated, the available bandwidth after T seconds is estimated. Specifically, the first available bandwidth estimation unit 145 stores, from the storage unit 150, bi _{, j} ^{s, c} that are average values of available bandwidths for each SSID and channel for each subarea ^, and the number of communication terminals N _{i, j} is read, and the estimated bandwidth B _{i, j} [Mbps] (i = 0, 1,..., m, j = 0, 1,..., n) of each sub-area is expressed by the equation (2). ) To calculate.

The first available bandwidth estimation unit 145 stores the calculated available bandwidth estimation value B _ij of each sub-area in the storage unit 150, and the congestion state estimation unit 146 has updated the available bandwidth estimation value B _{i, j} . Notify that.

When the congestion status estimation unit 146 receives from the first available bandwidth estimation unit 145 that the estimated value B _{i, j} of the available bandwidth has been updated, the congestion status estimation unit 146 estimates the network congestion level status (this is called the network status). To do. Specifically, the congestion state estimation unit 146 is determined for each number of stages of the heat map determined in advance in order to display the estimated value B _{i, j} [Mbps] of the usable bandwidth of each sub-area as the network state. The color of the heat map is determined in comparison with the throughput threshold. Here, the throughput threshold is a value such as a multiple of the bit rate value required for the video distributed by each wireless communication terminal. The congestion status estimation unit 146 stores this as a network status in the storage unit 150 and notifies the first control unit 120 that the network status estimation processing has been completed.

  The storage unit 150 is a storage medium such as a memory, for example. As described above, the storage unit 150 stores the location information received from each wireless communication terminal 200 and the available bandwidth of the wireless LAN, or the network status result estimated by the network status estimation unit 140 and the terminal number distribution as the result. The various data are stored.

  Next, FIG. 6 is a block diagram showing an example of the configuration of the wireless communication terminal 200 according to the first embodiment of the present invention. The wireless communication terminal 200 includes a second communication unit 210, a second control unit 220, a position information acquisition unit 230, and a first available bandwidth measurement unit 240.

  The second communication unit 210 may be realized by, for example, a processor controlled by the OS kernel and a communication interface that is communicably connected to the processor. In that case, the second communication unit 210 may perform processing such as transport layer processing, network layer processing, and MAC processing, for example. The transport layer process is, for example, a TCP or UDP process. The network layer processing is, for example, IP processing. The second communication unit 210 may be, for example, a communication module that performs communication in accordance with a wireless LAN standard. The second communication unit 210 transmits the position information acquired by the position information acquisition unit 230 of the wireless communication terminal 200 and the information on the usable bandwidth of the wireless LAN measured by the first usable bandwidth measurement unit 240 to the first wireless network 300. Via the wireless network status estimation apparatus 100.

  The second control unit 220 and the first available bandwidth measurement unit 240 may be realized by a CPU that executes processing by program control, for example. Specifically, the second control unit 220 and the first available bandwidth measurement unit 240 may be realized by a CPU that executes processing according to application software that operates based on an OS installed in the wireless communication terminal 200, for example. Good. In other words, the CPU may operate as the second control unit 220 and the first available bandwidth measurement unit 240 by executing a program loaded in the memory. The first usable bandwidth measuring unit 240 may be implemented as a hardware engine such as a circuit for processing the function at high speed.

  The second control unit 220 acquires location information from the location information acquisition unit 230 at predetermined time intervals t [seconds], and also, the SSID and channel of the wireless LAN connected from the second communication unit 210, The wireless LAN available bandwidth measured from the first available bandwidth measuring unit 240 is acquired. The second control unit 220 transmits these pieces of information to the wireless network status estimation device 100 via the second communication unit 210 and the first wireless network 300. The second control unit 220 instructs the second communication unit 210, the position information acquisition unit 230, and the first available bandwidth measurement unit 240 to acquire and measure each piece of information at a predetermined time t [seconds]. The result may be acquired, or the latest result acquired and measured may be received.

  The position information acquisition unit 230 acquires position information. Specifically, the position information acquisition unit 230 receives a GPS signal and acquires the latitude and longitude information of the own wireless communication terminal.

  The first available bandwidth measuring unit 240 measures the available bandwidth of the wireless LAN. Specifically, the first available bandwidth measuring unit 240 estimates a bandwidth that can be used to the maximum extent in the wireless LAN to which the second communication unit 210 is connected (referred to as an available bandwidth). Various existing methods can be applied as a method for estimating the available bandwidth. The first available bandwidth measurement unit 240 notifies the second control unit 220 of the SSID and channel of the wireless LAN connected to the measured available bandwidth in accordance with an instruction from the second control unit 220.

~processing~
Next, the operation of the wireless network status estimation apparatus 100 according to the first embodiment of this invention will be described. FIG. 7 is a flowchart illustrating the operation of the wireless network status estimation device 100 according to the first embodiment of this invention.

Step A11:
For example, when the wireless network status estimation apparatus 100 is powered on, the wireless network status estimation apparatus 100 performs an initialization process. For example, the wireless network status estimation apparatus 100 may perform initialization processing in accordance with an instruction received by the administrator through the input / output unit 130. Setup is started by the initialization process. When the setup of the wireless network status estimation apparatus 100 is completed by the initialization process, the first control unit 120 accepts a map of the entire event venue, which is a security target area, or an aerial photograph, and is specified by the administrator through the input / output unit 130 The security target area is divided into sub-areas according to the size to be stored, stored in the storage unit 150, and the process of step A12 is performed. Since the sub-area division is as described above, the description thereof is omitted.

Step A12:
The first control unit 120 transmits the terminal location information, the wireless LAN connection destination SSID, the channel, and the available bandwidth of each wireless communication terminal 200 transmitted from each wireless communication terminal 200 via the first communication unit 110. Receive. When the first control unit 120 receives the information, the first control unit 120 outputs the information to the network status estimation unit 140. The data extraction unit 141 of the network status estimation unit 140 extracts information on the location of the wireless communication terminal from the information from the wireless communication terminal 200 received from the first control unit 120 and inputs the information to the terminal location estimation unit 142. In addition, the data extraction unit 141 inputs the terminal location information of the wireless communication terminal 200, the wireless LAN connection destination SSID, the channel, and the available bandwidth to the first available bandwidth calculation unit 144, and performs the process of step A13.

Step A13:
The terminal position estimation unit 142 stores the position information of the wireless communication terminal 200 input from the data extraction unit 141 in the storage unit 150 and estimates a terminal position after T seconds set in advance. Since this terminal position estimation method has been described above, a detailed description thereof will be omitted. The terminal location estimation unit 142 calculates the probability that the wireless communication terminal 200 is located after T seconds for each subarea, and notifies the terminal number distribution estimation unit 143 that the existence probability of the wireless communication terminal has been updated. .

Step A14:
When the terminal number distribution estimation unit 143 receives notification from the terminal position estimation unit 142 that the existence probability of each subarea of the wireless communication terminal has been updated, the terminal number distribution estimation unit 143 estimates the number of communication terminals after T seconds in each subarea. Since the method for estimating the number of wireless communication terminals performs the above-described equation (1), detailed description thereof is omitted. When the estimation of the number of communication terminals in each sub-area is completed, the terminal number distribution estimation unit 143 notifies the first available bandwidth estimation unit 145 that the terminal number distribution has been updated, and performs the process of step A15.

Step A15:
The first available bandwidth calculation unit 144 identifies the subarea where the wireless communication terminal currently exists from the position information of the wireless communication terminal input from the data extraction unit 141, and stores the wireless LAN connection destination SSID in the storage unit 150. Store together with channel and available bandwidth. In addition, the first available bandwidth calculation unit 144 calculates an average value of available bandwidths of wireless communication terminals having the same channel as the connection destination SSID of the wireless LAN of the wireless communication terminal in the subarea where the wireless communication terminal currently exists. The method for calculating the average value of the available bandwidth is as described above. The first available bandwidth calculation unit 144 stores the calculated average value of the available bandwidth of the subarea in the storage unit 150 and notifies the first available bandwidth estimation unit 145 that the average value of the available bandwidth has been updated. .

Step A16:
The first available bandwidth estimation unit 145, when receiving information that the information has been updated from the terminal number distribution estimation unit 143 and the first available bandwidth calculation unit 144, estimates the available bandwidth after T seconds in each subarea. . Since the estimation method of the available bandwidth is also estimated using the above-described equation (2), detailed description thereof is omitted here. The first available bandwidth estimation unit 145 stores the calculated estimated value of the available bandwidth of each sub-area in the storage unit 150, and notifies the congestion status estimation unit 146 that the estimated value of the available bandwidth has been updated. Process A17 is performed.

Step A17:
When the congestion status estimation unit 146 receives a notification from the first available bandwidth estimation unit 145 that the estimated value of the available bandwidth has been updated, the congestion status estimation unit 146 estimates the network status (network congestion status). The network state estimation method is as described above. The congestion status estimation unit 146 stores this as a network status in the storage unit 150 and notifies the first control unit 120 that the network status estimation processing has been completed. When the first control unit 120 receives from the congestion status estimation unit 146 that the network status estimation processing has been completed, the first control unit 120 reads the estimated network status from the storage unit 150, displays the estimated network status on the input / output unit 130, and performs the process of step A18. Do. Since this display method is as described above, detailed description thereof is omitted.

Step A18:
For example, when the wireless network status estimation apparatus 100 is turned off, or when the administrator receives an end instruction through the input / output unit 130 (Yes in step A18), the radio network status estimation apparatus 100 performs the processing. finish. If the wireless network condition estimation apparatus 100 does not receive an instruction to end (No in step A18), the wireless network condition estimation apparatus 100 returns to step A12 and waits for reception of various information from the wireless communication terminal 200.

  Next, the operation of the wireless communication terminal 200 according to the first embodiment of this invention will be described. FIG. 8 is a flowchart showing an example of the operation of the wireless communication terminal according to the first embodiment of the present invention.

Step B11:
For example, when the wireless communication terminal 200 is powered on, the wireless communication terminal 200 performs an initialization process. For example, after the wireless communication terminal 200 is connected to a wireless LAN to which the own wireless communication terminal 200 can be connected, which corresponds to the first wireless network 300, the wireless communication terminal 200 is used for the wireless network status estimation device 100 or for a security service not shown. The initialization process may be performed in accordance with an instruction from the control server. The initialization process of the wireless communication terminal 200 uses the above-described connection to the first wireless network 300, preparation for acquiring a GPS signal for acquiring position information (initialization process of the position information acquisition unit 230), and a wearable camera. Preparation work for starting video shooting. Note that the wireless communication terminal 200 shown in FIG. 6 does not show a wearable camera that is not an essential part of the present invention. When the initialization process is completed, the wireless communication terminal 200 performs the process of step B12.

Step B12:
The second control unit 220 acquires position information from the position information acquisition unit 230. At this time, the second control unit 220 may instruct the position information acquisition unit 230 to acquire the position information and acquire the result, or the result acquired in advance by the position information acquisition unit 230 may be obtained. You may receive it. Here, the position information is latitude and longitude information acquired using GPS. When the second control unit 220 acquires the position information of the own wireless communication terminal 200 from the position information acquisition unit 230, the second control unit 220 performs Step B13.

Step B13:
The second control unit 220 acquires the SSID and channel of the wireless LAN connected from the second communication unit 210 and the available bandwidth of the wireless LAN measured from the first available bandwidth measurement unit 240. At this time, the second control unit 220 may instruct the first available band measurement unit 240 to measure the available band and acquire the result as in the case of acquiring the position information. You may receive the newest result which the band measurement part 240 measured beforehand. When the second control unit 220 receives the information from the second communication unit 210 and the first available band measurement unit 240, the second control unit 220 performs Step B14.

Step B14:
The second control unit 220 includes the location information from the location information acquisition unit 230, the SSID and channel of the wireless LAN connected from the second communication unit 210, and the available bandwidth of the wireless LAN measured from the first available bandwidth measurement unit 240. Is acquired, the information is transmitted to the wireless network status estimating apparatus 100 via the second communication unit 210 and the first wireless network 300.

Step B15:
The wireless communication terminal 200 ends, for example, when the power of the wireless communication terminal 200 is turned off, or from the wireless network status estimation device 100 or the control server for security work not shown through the first wireless network 300 Is received (Yes in step B15), the process is terminated. If the wireless communication terminal 200 does not receive the termination instruction (No in Step B15), the wireless communication terminal 200 executes the process in Step B16.

Step B16:
The wireless communication terminal 200 checks whether or not a predetermined time t has elapsed from the time when the various types of information described above are transmitted to the wireless network state estimation device 100 in step B14. When the predetermined time t has elapsed (Yes in Step B16), the process returns to Step B12. When the predetermined time t has not elapsed (No in Step B16), the process returns to Step B15.

  As described above, according to the present embodiment, the wireless network status estimation device 100 collects the available bandwidth of the wireless LAN connected to the current location information of the wireless communication terminal from each wireless communication terminal 200 and uses the collected information. The congestion status of the wireless network (wireless LAN) after a certain time has elapsed is estimated and displayed. Thereby, the situation of the wireless network can be estimated for each area in consideration of a change in the communication situation due to a sudden occurrence such as a large number of spectators gathering at the event. In addition, by displaying the wireless LAN status in the security area in advance, it is possible for the administrator to grasp or instruct the area where a portable wireless LAN access point should be moved or newly installed, resulting in degraded video distribution quality. Can be prevented. Therefore, the situation of the wireless network can be estimated for each area in consideration of a change in the communication situation due to a large number of spectators gathering at the event.

  The usable bandwidth of the wireless LAN is not limited to that acquired from the wireless communication terminal 200. For example, it may be acquired from an access point of the first wireless network 300.

<Second Embodiment>
~Constitution~
Next, a second embodiment for carrying out the invention will be described in detail with reference to the drawings. FIG. 9 is a block diagram illustrating an example of the configuration of the wireless network status estimation system 2 according to the second embodiment of this invention. The wireless network state estimation system 2 of this embodiment includes a wireless network state estimation device 101 and one or more wireless communication terminals 201. The wireless network status estimation apparatus 101 and the one or more wireless communication terminals 201 may be connected to each other via the first wireless network 300 and the second wireless network 301 so as to communicate with each other.

  Compared with the wireless network status estimation system 1 in the first embodiment shown in FIG. 1, the wireless network status estimation system 2 according to the present embodiment uses a wireless network status estimation device 101 instead of the wireless network status estimation device 100 as a wireless network. A wireless communication terminal 201 is included instead of the communication terminal 200. The wireless network status estimation apparatus 101 and the wireless communication terminal 201 are connected to each other via the second wireless network 301 in addition to the first wireless network 300. The first wireless network 300 is the same as the first wireless network 300 of the first embodiment.

  In the example illustrated in FIG. 9, wireless communication terminals 201 </ b> A, 201 </ b> B,... 201 </ b> M are illustrated as examples of the wireless communication terminal 201. The wireless communication terminals 201A, 201B,... 201M only need to include a common configuration shown as the configuration of the wireless communication terminal 201 described below. Hereinafter, the wireless communication terminals 201A, 201B,... 201M are collectively referred to as the wireless communication terminal 201. The wireless network status estimation apparatus 101 has a wired communication function according to a standard such as Ethernet (registered trademark), and is connected to both the first wireless communication network 300 and the wireless network 301 by the wired communication function. The wireless communication terminal 201 has a wireless communication function for connecting to the first wireless network 300 and the second wireless network 301. The wireless communication function for connecting to the first wireless network 300 may be, for example, a function of performing communication using a wireless LAN (Local Area Network) in accordance with a Wi-Fi (abbreviation of wireless fidelity, registered trademark) standard. . Further, the wireless communication function for connecting to the second wireless network 301 may be a function of performing communication via a mobile network such as LTE. The wireless communication terminal 201 uses these wireless communication functions, specifically, the first wireless network 300 and the second wireless network via the first wireless network 300 and the second wireless network 301. The wireless network status estimation apparatus 100 may be communicably connected via a wireless access point or a base station. Note that the wireless network condition estimation apparatus 101 may have a wireless communication function including LTE, and may be connected to the first wireless network 300 and the second wireless network 301 by the wireless communication function. Similarly, at least some of the wireless communication terminals 201 may have a wired communication function, and may be connected to the first wireless network 300 and the second wireless network 301 by the wired communication function.

  FIG. 10 is a block diagram illustrating an example of the configuration of the wireless network status estimation apparatus 101 according to the present embodiment. As shown in FIG. 10, the wireless network situation estimation apparatus 101 of this embodiment replaces the network situation estimation section 140 of the wireless network situation estimation apparatus 100 in the first embodiment shown in FIG. Since other configurations are the same, description thereof is omitted.

  The network state estimation unit 140 according to the first embodiment uses a location information of the wireless communication terminal received from each wireless communication terminal 200, a connection destination SSID, a channel, and an available bandwidth of the connected wireless LAN, after a predetermined time has elapsed. Estimate the network status. On the other hand, the network status estimation unit 160 in the present embodiment adds the location information of each wireless communication terminal 201 to the wireless communication terminal, the connection destination SSID, channel and available bandwidth of the connected wireless LAN, Information on available bandwidth is received, and the network status after a certain period of time is estimated from the information.

  FIG. 11 is a block diagram illustrating an example of the configuration of the network situation estimation unit 160 in the present embodiment. The network situation estimation unit 160 in the present embodiment replaces the data extraction unit 141 and the congestion situation estimation unit 146 in the network situation estimation unit 140 in the first embodiment with a data extraction unit 161 and a congestion situation estimation unit 163, respectively. This is a configuration to which two available bandwidth estimation units 162 are added, and the other configurations are the same, and thus the description thereof is omitted.

  The data extraction unit 141 in the first embodiment extracts information on the terminal position of the wireless communication terminal 200 from the information on each wireless communication terminal 200 received from the first control unit 120 and inputs the information to the terminal position estimation unit 142. The terminal location information of the wireless communication terminal 200, the wireless LAN connection destination SSID, the channel, and the available bandwidth have been input to the first available bandwidth calculation unit 144. On the other hand, the data extraction unit 161 in the present embodiment inputs the terminal position information of the wireless communication terminal 201 to the terminal position estimation unit 142 from the information of each wireless communication terminal 201 received from the first control unit 120. In addition, the data extraction unit 161 inputs the terminal location information of the wireless communication terminal 201, the wireless LAN connection destination SSID, the channel, and the available bandwidth to the first available bandwidth calculation unit 144. Further, the data extraction unit 161 inputs the terminal location information of the wireless communication terminal 201 and the available bandwidth of the mobile network to the second available bandwidth estimation unit 162.

The second available bandwidth estimation unit 162 identifies the subarea where the wireless communication terminal currently exists from the position information of the wireless communication terminal input from the data extraction unit 161, and stores the available bandwidth of the mobile network in the storage unit 150. Remember me. Also, the second available bandwidth estimation unit 162 reads the mobile network available bandwidth of all terminals existing in the same subarea as the subarea where the wireless communication terminal currently exists from the storage unit 150, and all the terminals in each subarea The average value Mb _{i, j} [Mbps] (i = 0, 1,..., M, j = 0, 1,..., N) of the available bandwidth of the mobile network is calculated. The second available bandwidth estimation unit 162 stores the calculated average value of the available bandwidth of the mobile network in the subarea in the storage unit 150, and indicates that the average value of the available bandwidth of the mobile network has been updated. 163 is notified.

The congestion status estimation unit 146 in the first embodiment estimates the network status from the estimated value of the available bandwidth of the first wireless network 300 (wireless LAN) updated by the first available bandwidth estimation unit 145. On the other hand, the congestion state estimation unit 163 in the present embodiment and the estimated value of the available bandwidth of the first wireless network 300 (wireless LAN) updated by the first available bandwidth estimation unit 145 and the second wireless network 301 ( The network status is estimated from the average value of the available bandwidth of the mobile network. Specifically, the congestion state estimation unit 163 uses the estimated value B _{i, j} [Mbps] of the usable bandwidth of the first wireless network 300 in each subarea and the average value Mb of the usable bandwidth of the second wireless network 301. The estimated value MB _{i, j} [Mbps] of the available bandwidth of the wireless network in each subarea is calculated using Expression (3) with _{i, j} [Mbps] as an argument.

Here, the function f (B _{i, j} , Mb _{i, j} ) is given as a weighted average as shown in the following equation, for example.

Further, the weight w in the above equation may be changed according to the average value Mb _{i, j} [Mbps] of the available bandwidth of the second wireless network. For example, if the average value Mb _{i, j} is smaller than the value of the bit rate required for the video distributed by each wireless communication terminal 201, w is set to a small value, and the estimated value of the usable bandwidth of the first wireless network 300 is set to a larger value. It may be changed to be an important indicator. Further, if the average value Mb _{i, j} is larger than the bit rate value required for the video distributed by each wireless communication terminal 201, w is set to a large value, and the average of the usable bandwidth of the second wireless network 301 is more important. You may change so that it may become a parameter | index.

The congestion status estimation unit 163 uses the throughput threshold value determined for each number of stages of the heat map determined in advance to display the MB _{i, j} [Mbps] obtained by the above equation (3) as the network status. In comparison, the color of the heat map is determined. The throughput threshold is the same as the threshold in the first embodiment. The congestion status estimation unit 163 stores this in the storage unit 150 as a network status, and notifies the first control unit 120 that the network status estimation processing has been completed.

  Next, FIG. 12 is a block diagram illustrating an example of a configuration of the wireless communication terminal 201 according to the second embodiment of the present invention. As shown in FIG. 12, the wireless communication terminal 201 of the present embodiment has a configuration in which a third communication unit 250 and a second available band measurement unit 260 are added to the wireless communication terminal 200 of the first embodiment shown in FIG. 6. Since other configurations are the same, description thereof is omitted. The second communication unit 210 of the wireless communication terminal 201 is connected to the first wireless network 300 for communication, and the third communication unit 250 is connected to the second wireless network 301 for communication. . Various information that each wireless communication terminal 201 transmits to the wireless network status estimation apparatus 101 only needs to be transmitted using either the second communication unit 210 or the third communication unit 250.

  The third communication unit 250 may be realized by, for example, a processor controlled by an OS kernel and a communication interface that is communicably connected to the processor. In this case, the third communication unit 250 may perform processes such as transport layer processing, network layer processing, and MAC. The transport layer process is, for example, a process such as TCP or UDP. The network layer process is, for example, an IP process. The third communication unit 250 may be a communication module that performs communication in accordance with a mobile network standard such as LTE. The third communication unit 250 receives the position information acquired by each wireless communication terminal 201, the SSID and channel of the connected wireless LAN, the measured available bandwidth, and the measured mobile network usable bandwidth information as the second information. Can be transmitted to the wireless network status estimation apparatus 101 via the wireless network 301.

  The second available bandwidth measuring unit 260 measures the available bandwidth of the mobile network that is the second wireless network 301. Specifically, the second available bandwidth measurement unit 260 estimates the maximum available bandwidth in the mobile network to which the third communication unit 250 is connected. Various existing methods can be applied as a method for estimating the available bandwidth. The second available bandwidth measurement unit 260 notifies the second control unit 220 of the measured available bandwidth of the mobile network in accordance with an instruction from the second control unit 220.

~processing~
Next, the operation of the wireless network status estimation apparatus 101 according to the second embodiment of this invention will be described. FIG. 13 is a flowchart showing an example of the operation of the wireless network status estimation apparatus 101 according to this embodiment. The operation of the wireless network situation estimation apparatus 101 of the present embodiment is the same as the operation of Step A17 in the operation of the wireless network situation estimation apparatus 100 of the first embodiment of the present invention shown in FIG. Is. In other steps, the operation is the same as the operation of the step given the same reference numeral shown in FIG.

Step A21:
The second available bandwidth estimation unit 162 identifies the subarea where the wireless communication terminal currently exists from the position information of the wireless communication terminal input from the data extraction unit 161, and stores the available bandwidth of the mobile network in the storage unit 150. Remember me. The second available bandwidth estimation unit 162 reads the available bandwidth of the mobile network of all terminals existing in the same subarea as the subarea where the wireless communication terminal currently exists from the storage unit 150, and calculates an average value thereof. The method for calculating the average value of the available bandwidth is as described above. The second available bandwidth estimation unit 162 stores the calculated average value of the available bandwidth of the subarea in the storage unit 150 and notifies the congestion state estimation unit 163 that the average value of the available bandwidth has been updated.

Step A22:
The congestion state estimation unit 163 updates the estimated value of the available bandwidth of the wireless LAN from the first available bandwidth estimation unit 145 and updates the average value of the available bandwidth of the mobile network from the second available bandwidth estimation unit 162. When it is received, the network status (network congestion status) is estimated. The network state estimation method is as described above. The congestion status estimation unit 163 stores this in the storage unit 150 as a network status, and notifies the first control unit 120 that the network status estimation processing has been completed. When the first control unit 120 receives from the congestion status estimation unit 163 that the network status estimation processing has been completed, the first control unit 120 reads the estimated network status from the storage unit 150, displays the estimated network status on the input / output unit 130, and performs the process of step A18. Do. About this display method, in addition to the display method in the first embodiment, it may be possible to switch to display the average value of the available bandwidth of the mobile network in each sub-area calculated by the second available bandwidth estimation unit 162. .

  Next, the operation of the wireless communication terminal 201 according to the second embodiment of this invention will be described. FIG. 14 is a flowchart illustrating an example of the operation of the wireless communication terminal according to the present embodiment. The operation of the wireless communication terminal 201 of the present embodiment is obtained by replacing the operation of Step B14 in the operation of the wireless communication terminal 200 of the first embodiment of the present invention shown in FIG. 8 with Step B21 and Step B22. In other steps, the operation is the same as the operation of the step given the same reference numeral shown in FIG.

Step B21:
When the second control unit 220 acquires the SSID and channel of the wireless LAN connected from the second communication unit 210 and the available bandwidth of the wireless LAN measured from the first available bandwidth measurement unit 240, the second available bandwidth measurement unit The available bandwidth of the mobile network is acquired from 260. At this time, the second control unit 220 acquires the location information from the location information acquisition unit 230 and the wireless LAN SSID and channel from the second communication unit 210 and the available bandwidth from the first available bandwidth measurement unit 240. As in the case of performing, the second available bandwidth measuring unit 260 may be instructed to measure the available bandwidth, and the result may be acquired. Or the 2nd control part 220 may receive the newest result which the 2nd usable band measurement part 260 measured beforehand. In addition, as the method by which the second available bandwidth measuring unit 260 measures the available bandwidth, various existing methods can be applied. When the second control unit 220 receives the information from the second available bandwidth measurement unit 260, the second control unit 220 performs Step B22.

Step B22:
The second control unit 220 includes the location information from the location information acquisition unit 230, the SSID and channel of the wireless LAN connected from the second communication unit 210, and the available bandwidth of the wireless LAN measured from the first available bandwidth measurement unit 240. When the available bandwidth of the mobile network is acquired from the second available bandwidth measurement unit 260, these pieces of information are transmitted to the wireless network status estimation apparatus 101. Specifically, the second control unit 220 passes through the second communication unit 210 and the first wireless network 300 to which the second communication unit 210 is connected, or the third communication unit 250 and the third communication. The data is transmitted to the wireless network status estimation apparatus 101 via the second wireless network 301 to which the unit 250 is connected. At this time, as to which is to be transmitted, the one that is connected to the network and can communicate is selected. If both networks can be connected and communicated, they may be transmitted according to a preset priority.

  As described above, according to the present embodiment, the wireless network status estimation apparatus 101 includes, from each wireless communication terminal 201, the current location information of the wireless communication terminal, the available bandwidth of the connected wireless LAN, and the available bandwidth of the mobile network. And the congestion status of the wireless network including the wireless LAN and the mobile network after a lapse of a certain time is estimated and displayed from the collected information. As a result, as in the first embodiment, it is possible to estimate the status of the wireless network for each area in consideration of changes in the communication status due to a sudden occurrence such as a large number of spectators gathering at the event. it can. Furthermore, by displaying in advance the wireless network status that takes into account both the mobile network and wireless LAN used to distribute video in the security area, video distribution becomes difficult even when both the mobile network and wireless LAN are used. The administrator can grasp this. As a result, it is possible to grasp and instruct an area where it is difficult to move the wireless LAN access point or to newly install an additional video distribution, and to prevent degradation of the video distribution quality.

  In this embodiment, the available bandwidth of the wireless LAN and the mobile network is not limited to that acquired from the wireless communication terminal 201. For example, the usable bandwidth of the wireless LAN and the mobile network may be acquired from an access point of the wireless LAN or a base station of the mobile network.

Next, a modification of this embodiment will be described.
(First modification)
In the present embodiment, for example, the first wireless network 300 that is a wireless LAN and the second wireless network 301 that is a mobile network such as LTE, for example, the wireless network status estimation apparatus 101 and one or more A wireless communication terminal 201 is connected. However, in addition to these, one or more wireless communication terminals 201 or a part of the wireless communication terminals 201 are further wirelessly transmitted via a mobile network that is one or more mobile carrier networks, that is, third and fourth communication networks. It may be connected to the network status estimation apparatus 101. In this case, the wireless communication terminal 201 connected to the wireless network situation estimation apparatus 101 via one or more mobile networks may measure each available bandwidth and transmit it to the wireless network situation estimation apparatus 101. In this case, the second available bandwidth estimation unit 162 of the wireless network status estimation apparatus 101 calculates a certain wireless communication terminal 201 in calculating Mb _{i, j} [Mbps] calculated as the average value of the available bandwidth of the second wireless network 301. The available bandwidth of the mobile network may be calculated using the total value of the available bandwidths of one or more mobile networks. Alternatively, the following may be used. For example, the second available bandwidth estimation unit 162 calculates the available bandwidth of each mobile network for each type of mobile network. The second available bandwidth estimation unit 162 is an expression that is a function of the estimated value B _{i, j} [Mbps] of the available bandwidth of the first wireless network 300 in each subarea and the average value of the available bandwidth of each mobile network. Is used to calculate the estimated value MB _{i, j} [Mbps] of the available bandwidth of the wireless network in each sub-area. That is, the second available bandwidth estimation unit 162 may estimate the state of the wireless network using the wireless LAN and the available bandwidth of one or more mobile networks.

(Second modification)
In the present embodiment, the congestion status of the wireless network in each sub-area includes the estimated bandwidth B _{i, j} [Mbps] of the first wireless network 300 in each sub-area and the second wireless network 301. Was calculated as a function of the average value Mb _{i, j} [Mbps] of the available bandwidth (Equation (3)). However, the congestion status of the wireless network in each subarea is not limited to the function as shown in Equation (3). For example, if the average value of the usable bandwidth of the second wireless network 301 that is a mobile network is equal to or greater than a predetermined value, the network congestion state may be a magnitude of the estimated value of the usable bandwidth of the first wireless network 300. Nevertheless, it may be determined that the traffic is not crowded. The congestion status of the wireless network in each sub-area according to the present embodiment is determined based on a predetermined policy based on the estimated value of the available bandwidth of the first wireless network 300 and the average value of the available bandwidth of the second wireless network 301. According to the above, it is sufficient if it can be digitized.

<Third Embodiment>
~Constitution~
Next, a third embodiment for carrying out the invention will be described in detail with reference to the drawings.
FIG. 15 is a block diagram illustrating an example of a configuration of the wireless network status estimation system 3 according to the third embodiment of this invention. The wireless network state estimation system 3 of this embodiment includes a wireless network state estimation device 102 and one or more wireless communication terminals 201. The wireless network status estimation device 102 and the one or more wireless communication terminals 201 are connected to each other via a first wireless network 300 and a second wireless network 301 so as to communicate with each other.

  Compared with the wireless network situation estimation system 2 in the second embodiment shown in FIG. 9, the wireless network situation estimation system 3 of this embodiment includes a wireless network situation estimation apparatus 102 instead of the wireless network situation estimation apparatus 101. The wireless network status estimation apparatus 101 and the wireless communication terminal 201 are connected to each other via the second wireless network 301 in addition to the first wireless network 300. The first wireless network 300 is the same as the first wireless network 300 of the first embodiment. The wireless communication terminal 201, the first wireless network 300, and the second wireless network 301 are the same as the wireless communication terminal 201, the first wireless network 300, and the second wireless network 301 of the second embodiment, respectively. .

  FIG. 16 is a block diagram illustrating an example of the configuration of the wireless network status estimation apparatus 102 according to the present embodiment. As illustrated in FIG. 16, the wireless network state estimation device 102 according to the present embodiment replaces the network state estimation unit 160 of the wireless network state estimation device 101 according to the second embodiment illustrated in FIG. 10 with a network state estimation unit 170. Since other configurations are the same, description thereof is omitted.

  The network status estimation unit 160 in the second embodiment is connected to the location information of the wireless communication terminal received from each wireless communication terminal 201 and the connection destination SSID, channel, and available bandwidth of the connected wireless LAN. The network status after a certain time has been estimated from the available bandwidth of the mobile network. In addition to these, the network state estimation unit 170 in the present embodiment is input from the first wireless network 300 or the second wireless network 301 through the input / output unit 130 or the first communication unit 110 of the wireless network state estimation apparatus 102. Estimate the network status after a certain period of time using information on the degree of congestion of people.

  Here, the degree of congestion of the person is determined from the video analysis device (not shown) that is different from the wireless network status estimation device 102 through the input / output unit 130 or the first communication unit 110 of the wireless network status estimation device 102. The data is input from the network 300, the second wireless network 301, or a network (not shown) and stored in the storage unit 150 by the first control unit 120. Specifically, the degree of human congestion is determined by analyzing images taken by a surveillance camera installed in the security target area and a wearable camera connected to each wireless communication terminal 201 using a video analysis device. The degree of congestion is quantified. Since a technique for analyzing the degree of congestion of a person using such an image can be realized by various existing techniques, a detailed description thereof is omitted here. More specifically, position information and video are acquired from each monitoring camera or wearable camera at a preset time interval, a subarea including the position of the camera is obtained, and a camera located in the subarea is obtained. The average value of the latest congestion level analyzed from the captured video is calculated. This calculated average value is used as the degree of congestion of the people in the sub-area.

  FIG. 17 is a block diagram illustrating an example of the configuration of the network status estimation unit 170 in the present embodiment. The network status estimation unit 170 in the present embodiment has a configuration in which the congestion status estimation unit 163 in the network status estimation unit 160 in the second embodiment is replaced with a congestion status estimation unit 171, and the other configurations are the same. Therefore, explanation is omitted.

The congestion state estimation unit 163 according to the second embodiment includes an estimated value of the usable bandwidth of the first wireless network 300 (wireless LAN) updated by the first usable bandwidth estimation unit 145, and the second wireless network 301 (mobile network). ) Estimated the network status from the average available bandwidth. On the other hand, the congestion state estimation unit 171 in the present embodiment and the estimated value of the available bandwidth of the first wireless network 300 (wireless LAN) updated by the first available bandwidth estimation unit 145 and the second wireless network 301 (mobile In addition to the average value of the available bandwidth of the network), the network status is estimated using information on the degree of congestion of the person stored in the storage unit 150. Specifically, the congestion state estimation unit 171 uses the estimated value B _{i, j} of the usable bandwidth of the first wireless network 300 in each subarea and the average value Mb _{i, j} of the usable bandwidth of the second wireless network 301. Then, the estimated value MB _{i, j} of the usable bandwidth of the wireless network in each sub-area is calculated using Expression (4) with the degree of human congestion C _{i, j} as an argument.

Here, the function f (B _{i, j} , Mb _{i, j} , C _{i, j} ) takes a weighted average of B _{i, j} and Mb _{i, j} , for example, When the degree of congestion C _{i, j} exceeds a certain threshold C, it can be given by multiplying C / C _{i, j} . Here, the threshold value C can be set by the degree of congestion of a person when the throughput of the mobile network is reduced at the event so far.

Similarly to the second embodiment, the weight w in the above equation may be changed according to the average value Mb _{i, j} [Mbps] of the usable bandwidth of the second wireless network.

The congestion state estimation unit 171 uses the throughput threshold value determined for each number of stages of the heat map determined in advance to display the MB _{i, j} [Mbps] obtained by the above equation (4) as the network state. In comparison, the color of the heat map is determined. The throughput threshold is the same as the threshold in the first and second embodiments. The congestion status estimation unit 171 stores this in the storage unit 150 as a network status, and notifies the first control unit 120 that the network status estimation processing has been completed.

~processing~
Next, the operation of the wireless network status estimation apparatus 102 according to the third embodiment of the present invention will be described. FIG. 18 is a flowchart showing an example of the operation of the wireless network status estimation apparatus 102 according to this embodiment. The operation of the wireless network situation estimation apparatus 102 of the present embodiment is obtained by replacing the operation of step A22 in the operation of the wireless network situation estimation apparatus 101 of the second embodiment of the present invention shown in FIG. 13 with step A31. . In other steps, the operation is the same as the operation of the step given the same reference numeral shown in FIG.

Step A31:
The congestion state estimation unit 171 updates the estimated value of the available bandwidth of the wireless LAN from the first available bandwidth estimation unit 145, and updates the average value of the available bandwidth of the mobile network from the second available bandwidth estimation unit 162. When it is received, the network status (network congestion status) is estimated. The network state estimation method is as described above. The congestion status estimation unit 171 stores this in the storage unit 150 as a network status, and notifies the first control unit 120 that the network status estimation processing has been completed. When the first control unit 120 receives from the congestion status estimation unit 171 that the network status estimation processing has been completed, the first control unit 120 reads the estimated network status from the storage unit 150, displays the estimated network status on the input / output unit 130, and performs the process of step A18. Do. About this display method, in addition to the display method in 2nd Embodiment, it may switch so that the congestion degree of the person of each subarea input from the outside may be displayed.

  As described above, according to the present embodiment, the wireless network status estimation apparatus 102 receives the current location information of each wireless communication terminal from each wireless communication terminal 201, the usable bandwidth of the connected wireless LAN, and the usable bandwidth of the mobile network. In addition, the congestion status of the wireless network including the wireless LAN and the mobile network after a lapse of a certain time is estimated and displayed using the information on the degree of congestion of the person. As a result, as in the first embodiment, it is possible to estimate the status of the wireless network for each area in consideration of changes in the communication status due to a sudden occurrence such as a large number of spectators gathering at the event. it can. In addition, in the security area, in addition to both the mobile network and wireless LAN used to distribute video, the general network congestion level that affects the throughput of the mobile network is taken into account, and the wireless network status is displayed in advance. Can do. That is, it becomes possible for an administrator to grasp and instruct an area where video distribution is difficult to move or newly install a wireless LAN access point, and to prevent deterioration in video distribution quality.

  As in the second embodiment, in this embodiment, the usable bandwidth of the wireless LAN and the mobile network is not limited to the one acquired from the wireless communication terminal 201, for example, from the access point of the wireless LAN or the base station of the mobile network. You can get it.

Next, a modification of this embodiment will be described.
(First modification)
In this embodiment, the video of the monitoring camera installed in the security target area and the wearable camera connected to each wireless communication terminal 201 is analyzed, and the degree of congestion of the person is obtained and used. However, instead of or in addition to people's congestion, the movement schedule of important people visiting the event, such as celebrities, famous athletes and VIPs (Very Important Person), can be used for certain subareas. The degree of congestion may be set high. Specifically, as the congestion degree C _{i, j in} Expression (4), a fixed high congestion degree may be set only in the time period.

(Second modification)
Also in the present embodiment, it is possible to apply the first modification example in the second embodiment.

(Third Modification)
Further, in the present embodiment, as in the second embodiment, the wireless network status estimation device 102 and one or more wireless communication terminals 201 are connected by the first wireless network 300 and the second wireless network. . However, as in the first embodiment, the wireless network status estimation apparatus 102 and one or more wireless communication terminals 200 may be connected only by the first wireless network 300. In this case, the congestion status of the wireless network is estimated from the estimated value of the available bandwidth of the first wireless network 300 and the degree of human congestion. Since the specific estimation method is the same as that of this embodiment, description is abbreviate | omitted.

(Fourth modification)
Furthermore, in the present embodiment, the congestion status of the wireless network in each subarea includes the estimated value B _{i, j} of the usable bandwidth of the first wireless network 300 in each subarea and the usable bandwidth of the second wireless network 301. Calculated as a function of the average value Mb _{i, j} and the congestion degree C _{i, j} of the person (formula (4)). However, the congestion status of the wireless network in each subarea is not limited to the function as shown in Equation (4). For example, as in the second modification of the second embodiment, if the average value of the available bandwidth of the second wireless network 301 that is a mobile network is equal to or greater than a predetermined value, the first wireless network 300 Regardless of the size of the estimated value of the available bandwidth, it is first determined that it is not crowded. In addition, if the degree of congestion of a person is equal to or less than a predetermined value, a method may be considered in which a final determination is made that there is no congestion. The congestion status of the wireless network in each sub-area in this embodiment is based on the estimated value of the usable bandwidth of the first wireless network 300, the average value of the usable bandwidth of the second wireless network 301, and the degree of congestion of people. It suffices if it can be quantified according to a predetermined policy.

<Fourth embodiment>
~Constitution~
Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 19 is a block diagram showing an example of the configuration of a wireless network status estimation system according to the fourth embodiment of the present invention.

  Referring to FIG. 19, the wireless network status estimation system 4 of this embodiment includes a wireless network status estimation device 103 and one or more wireless communication terminals 200 similar to those of the first embodiment. The wireless network status estimation device 103 and the one or more wireless communication terminals 200 are connected to each other via the first wireless network 300 so as to communicate with each other. In the example illustrated in FIG. 19, wireless communication terminals 200 </ b> A, 200 </ b> B,... 200 </ b> M are illustrated as examples of the wireless communication terminal 200. The wireless communication terminals 200A, 200B,... 200M are the same as in the first embodiment. The wireless communication terminals 200A, 200B,... 200M are collectively referred to as the wireless communication terminal 200.

  The wireless network status estimation apparatus 103 includes a network status estimation unit 140 and an information collection unit 180 similar to those in the first embodiment. The information collection unit 180 collects position information of one or more wireless communication terminals 200 and communication status information of the first wireless network 300. The communication status information of the wireless network includes, for example, Wi-Fi or LTE available bandwidth information and throughput. In addition, the information collection unit 180 may be configured to have all the functions of the first communication unit 110, the first control unit 120, the input / output unit 130, and the storage unit 150 of the first embodiment, for example. . For example, as in the first embodiment, information (latitude and longitude) of the security target area for estimating the network status is input to the information collection unit 180. The information collecting unit 180 generates information on an area (this is called a sub area) obtained by dividing the inside of the security target area with a predetermined size. For example, the sub-area information may be generated by dividing the security target area. The information collection unit 180 stores the generated subarea information. Note that the information collection unit 180 may collect the position information of the wireless communication terminal 200 and the communication status information of the first wireless network 300 from any place such as a receiving device or a base station, not only from the wireless communication terminal 200.

  As in the first embodiment, the network status estimation unit 140 estimates the number of communication terminals from the location information for each subarea obtained by dividing the target area for estimating the network status, and calculates the number of communication terminals and the communication status information. Use to estimate the wireless network status of each sub-area. Specifically, for example, the network status estimation unit 140 estimates the position of the wireless communication terminal 200 after a predetermined time T seconds based on the collected location information, and divides each security target area for estimating the network status. The number of communication terminals after a certain time T seconds in the subarea is estimated. Then, the network status estimation unit 140 calculates the average value of the usable bandwidth in each subarea from the collected usable bandwidth of the first wireless network, and uses the average value and the estimated number of communication terminals to determine the usable bandwidth of each subarea. Is estimated. Note that the average value of the available bandwidth in each sub-area may be calculated for each carrier as well as the overall average. The average value of the available bandwidth in each sub-area may be calculated for each Wi-Fi channel. The network status estimation unit 140 estimates the degree of congestion (wireless network status) of the wireless network in each subarea from the estimated value of the available bandwidth in each subarea. Note that the network status estimation unit 140 may estimate each subarea using the estimated communication status and the estimated number of communication terminals even if the radio network status of each subarea is estimated using the current communication status and the estimated number of communication terminals. The wireless network status of the area may be estimated.

~processing~
FIG. 20 is a flowchart illustrating an example of the operation of the wireless network status estimation apparatus according to this embodiment.
Step A41:
The information collection unit 180 receives the position information of each wireless communication terminal 200 and the first wireless network 300 to which each wireless communication terminal 200 is connected every predetermined time t [seconds] predetermined from each communication terminal 200. Collect communication status information, such as available bandwidth and throughput.

Step A42:
As in the first embodiment, the network status estimation unit 140 estimates the number of communication terminals from the location information for each subarea obtained by dividing the target area for estimating the network status, and collects the communication terminal information and the collected communication status information. Is used to estimate the wireless network status in the sub-area. Specifically, the network status estimation unit 140 estimates, for example, the location of the wireless communication terminal 200 after a predetermined time T seconds based on the collected location information, and divides each security target area for estimating the network status. The number of communication terminals after a certain time T seconds in the subarea is estimated. Then, the network state estimation unit 140 averages the usable bandwidth of the first wireless network 300 in each subarea from the usable bandwidth of the first wireless network 300 in each wireless communication terminal 200 collected from one or more wireless communication terminals 200. Calculate the value. Then, the network status estimation unit 140 calculates, for example, the first implementation from the average value of the available bandwidth of the first wireless network 300 in each subarea and the number of communication terminals existing in each estimated subarea after a predetermined time T seconds. The available bandwidth after a certain time T seconds in each sub-area is estimated by the same method as the embodiment. The network state estimation unit 140 estimates the degree of congestion (wireless network state) of the wireless network in each subarea from the estimated available bandwidth value of each subarea, for example, by the same method as in the first embodiment.

  As described above, according to the present embodiment described above, it is possible to estimate the state of the wireless network for each area in consideration of a change in the communication state due to a sudden occurrence such as a large number of spectators gathering at the event. it can. The reason is that the network status estimation unit estimates the number of communication terminals existing in each subarea, calculates the usable bandwidth of the first wireless network to which each wireless communication terminal is connected, and estimates the communication in each subarea. This is because the available bandwidth of each sub-area after a predetermined time has been estimated using the number of terminals. Furthermore, the network status estimation unit estimates and displays the network congestion status of each subarea based on the estimated available bandwidth of each subarea after a lapse of a certain time, so that the administrator can determine the wireless network of each subarea. It is possible to grasp the situation in a certain time. In addition, the administrator can issue an instruction to move or newly install a portable wireless LAN access point in a subarea that is displayed as being congested where video distribution from a wireless communication terminal is difficult. Become. As a result, it is possible to prevent quality degradation of video distribution.

<Other embodiments>
In the examples of the first, second, third, and fourth embodiments described above, the wireless communication terminals 200 and 201 are connected with the current availability of the first wireless network 300 and the second wireless network 301, respectively. The bandwidth was measured and transmitted to the wireless network status estimation devices 100, 101, 102, and 103. However, the available bandwidth transmitted by the wireless communication terminals 200 and 201 is not limited to the above example. The first available bandwidth measuring unit 240 and the second available bandwidth measuring unit 260 in the wireless communication terminals 200 and 201 are used after a certain period of time that the wireless network status estimation devices 100, 101, 102, and 103 estimate the network status. And may be treated as an available bandwidth by receiving the value. Similarly, the usable bandwidth may be estimated by a receiving terminal that is a video distribution destination of each of the wireless communication terminals 200 and 201, and may be treated as an usable bandwidth by receiving the value. There are various methods for estimating the available bandwidth as existing techniques. The first usable bandwidth measuring unit 240 and the second usable bandwidth measuring unit 260 in the wireless communication terminals 200 and 201 use those methods after a predetermined time elapses in the first wireless network 300 and the second wireless network 301. The available bandwidth can be estimated. In this case, the wireless network status estimation apparatuses 100, 101, 102, and 103 may similarly use the estimated value of the available bandwidth after a certain time has elapsed to estimate the network status. In addition, the first available bandwidth measuring unit 240 and the second available bandwidth measuring unit 260 in the wireless communication terminals 200 and 201 do not measure the maximum available bandwidth, but rather the traffic of the video data currently being distributed. Alternatively, the throughput may be measured and treated as an available bandwidth. At this time, the measurement of these throughputs may be measured by the receiving terminal that is the video distribution destination of each of the wireless communication terminals 200 and 201, receive the value of the throughput measured from the receiving terminal, and treat the value as an available bandwidth. .

  Note that each component of the wireless network status estimation device and the wireless communication terminal according to each embodiment described above is implemented by a dedicated circuit that is implemented as a semiconductor processing component including, for example, an ASIC (Application Specific Integrated Circuit). It may be realized. In addition, these components may be realized by a computer including a memory that stores a program that realizes the functions of these components and at least one processor that executes the program (one or more processors). Is, for example, a microprocessor (MPU (Micro Processing Unit)), a DSP (Digital Signal Processor), and combinations thereof.

  FIG. 21 is a block diagram showing an example of the configuration of a computer that can realize the wireless network status estimation device and the wireless communication terminal according to each embodiment of the present invention. Referring to FIG. 21, a computer 1000 includes a processor 1001, a memory 1002, a storage device 1003, and an I / O (Input / Output) interface 1004. The computer 1000 can access the recording medium 1005. The memory 1002 and the storage device 1003 are storage devices such as a RAM (Random Access Memory) and a hard disk, for example. The recording medium 1005 is, for example, a non-transitory computer readable medium that will be described in detail later. The storage device 1003 may be the recording medium 1005. The processor 1001 can read and write data and programs to and from the memory 1002 and the storage device 1003. The processor 1001 can access, for example, other devices connected to the first wireless network 300 and the second wireless network 301 via the I / O interface 1004. The processor 1001 can access the recording medium 1005. The recording medium 1005 stores a program that causes the computer 1000 to operate as a wireless network status estimation device or a wireless communication terminal according to any embodiment of the present invention.

  The processor 1001 loads a program stored in the recording medium 1005 into the memory 1002. Then, when the processor 1001 executes the program loaded in the memory 1002, the computer 1000 operates as a wireless network status estimation apparatus or a wireless communication terminal according to any embodiment of the present invention.

  Specifically, some or all of the first communication unit 110, the first control unit 120, the input / output unit 130, the network status estimation units 140, 160, 170, and the storage unit 150 can be realized by a dedicated circuit. The first communication unit 110, the first control unit 120, the input / output unit 130, the network status estimation units 140, 160, 170, and the storage unit 150 include a memory loaded with a program that realizes these functions, and the program It can be realized by one or more processors that execute. The storage unit 150 can be realized by a storage device such as a memory and a hard disk device included in the computer. Similarly, a part or all of the second communication unit 210, the second control unit 220, the position information acquisition unit 230, the first usable band measurement unit 240, the third communication unit 250, and the second usable band measurement unit 260 are: This can be realized by a dedicated circuit. The second communication unit 210, the second control unit 220, the position information acquisition unit 230, the first usable bandwidth measurement unit 240, the third communication unit 250, and the second usable bandwidth measurement unit 260 are programs that realize these functions. This can be realized by the loaded memory and one or more processors that execute the program.

  The above program can be stored in various types of non-transitory computer readable media and provided to a computer. Non-transitory computer readable media include various types of tangible storage media. The non-transitory computer readable medium may be, for example, a magnetic recording medium (for example, a flexible disk, a magnetic tape, a hard disk, etc.). Non-transitory computer-readable media include a magneto-optical recording medium (for example, a magneto-optical disk), a CD-ROM (Compact Disc Read Only Memory), a CD-R (Compact Disc-Recordable), and a CD-R / W (Compact Disc). -Rewritable etc.). The non-transitory computer readable medium may be a semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory), etc.). In addition, the program may be provided to the computer by various types of temporary computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can provide the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  Each embodiment described above is not limited to the above, and can be appropriately changed without departing from the scope of the invention. Each embodiment mentioned above is only an example about application of the technical idea obtained by this inventor. That is, the technical idea is not limited to the above-described embodiment, and various changes can be made.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a wireless network state estimation device that estimates a wireless network state in advance and displays the state, a wireless network state estimation system using the device, and a program for realizing the wireless network state estimation system. In addition, the administrator can move a portable wireless LAN access point or grasp the area to be newly installed and give instructions for additional installation to prevent degradation of video distribution quality over the wireless network. Available.

1, 2, 3, 4 Wireless network status estimation system 100, 101, 102, 103 Wireless network status estimation device 110 First communication unit 120 First control unit 130 Input / output unit 140, 160, 170 Network status estimation unit 141, 161 Data extraction unit 142 Terminal position estimation unit 143 Terminal number distribution estimation unit 144 First available bandwidth calculation unit 145 First available bandwidth estimation unit 146, 163, 171 Congestion state estimation unit 150 Storage unit 162 Second available bandwidth estimation unit 180 Information collection Unit 200, 200A, 200B, 200M, 201, 201A, 201B, 201M wireless communication terminal 210 second communication unit 220 second control unit 230 position information acquisition unit 240 first available bandwidth measurement unit 250 third communication unit 260 second available Band measurement unit 300 First wireless network 301 Second wireless network 1000 Computer 1001 Processor 1002 memory 1003 storage 1004 I / O interface 1005 recording medium

Claims (10)

Information collecting means for collecting position information of one or more wireless communication terminals connected via the first wireless network and communication status information of the first wireless network;
For each subarea obtained by dividing the target area for estimating the network status, the number of communication terminals is estimated from the position information, and the radio network status of each subarea is estimated using the number of communication terminals and the communication status information. Network status estimation means;
A wireless network status estimation device comprising: The network status estimating means includes
The radio network status estimation apparatus according to claim 1, further comprising: a terminal number distribution estimation unit that calculates the number of communication terminals existing in the subarea after a lapse of a certain time from the history of the position information. The network status estimating means further includes
First available bandwidth calculating means for calculating an average value of the available bandwidth of the sub-area using communication status information of the first wireless network;
First available bandwidth estimation means for estimating an available bandwidth of the first wireless network in the subarea after the lapse of the predetermined time based on an average value of available bandwidth in the subarea and the number of communication terminals;
The wireless network status estimation apparatus according to claim 2, comprising: The wireless communication terminal is further connected via a second wireless network;
The information collecting means collects communication status information of the second wireless network of the wireless communication terminal;
The network status estimating means includes
Second available bandwidth estimation means for estimating a radio network status of the sub-area using communication status information of the second radio network of the radio communication terminal;
The wireless network status estimation device according to claim 3, comprising: The network status estimating means includes
A congestion status estimation unit that estimates a radio network status of the subarea based on a radio network status of the subarea of the first radio network and a radio network status of the subarea of the second radio network;
The wireless network condition estimation apparatus according to claim 4. The network status estimating means includes
Estimating the wireless network status of the sub-area based on information on the degree of congestion of people,
The wireless network status estimation apparatus according to any one of claims 1 to 5. Further comprising display means for displaying the estimated wireless network status of the sub-area as a heat map of a predetermined number of colors on the map,
The radio | wireless network condition estimation apparatus in any one of Claim 1 to 6. Collecting location information of one or more wireless communication terminals connected via the first wireless network and communication status information of the first wireless network;
For each subarea obtained by dividing the target area for estimating the network status, the number of communication terminals is estimated from the position information, and the radio network status of each subarea is estimated using the number of communication terminals and the communication status information. ,
Wireless network status estimation method. On the computer,
A process of collecting position information of one or more wireless communication terminals connected via a first wireless network and communication status information of the first wireless network;
For each subarea obtained by dividing the target area for estimating the network status, the number of communication terminals is estimated from the position information, and the radio network status of each subarea is estimated using the number of communication terminals and the communication status information. Processing,
A wireless network status estimation program for executing A wireless network status estimation system comprising: a wireless network status estimation device; and one or more radio communication terminals connected via a first radio network,
The wireless network status estimation device includes:
Information collecting means for collecting position information of the one or more wireless communication terminals and communication status information of the first wireless network;
For each subarea obtained by dividing the target area for estimating the network status, the number of communication terminals is estimated from the position information, and the radio network status of each subarea is estimated using the number of communication terminals and the communication status information. Network status estimation means;
A wireless network status estimation system comprising:

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