Mobile body and wireless communication device

Abstract

The present disclosure provides a technique capable of acquiring peripheral communication quality and performing control on the basis of the peripheral communication quality. A mobile body is provided with a wireless communication unit and a control unit, and is characterized in that the control unit: receives, from a plurality of other mobile bodies through the wireless communication unit, a communication quality message including position information and communication quality information at a position indicated by the position information; determining a destination based on the communication quality message; and prompting the information related to the destination to a user.

Description

Technical Field

[0001] The present disclosure relates to a moving body and a wireless communication device. Background Art

[0002] Patent Document 1 discloses a content of creating a communication quality map while an autonomous mobile device moves and using it for path search. However, in this method, it is only possible to grasp the communication quality at the position where the autonomous mobile device travels by itself, and it is not possible to perform control considering the communication quality in the surroundings. Prior Art Documents Patent Documents

[0003] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2017-167625 Summary of the Invention Problems to be Solved by the Invention

[0004] An object of one aspect of the present disclosure is to provide a moving body and a wireless communication device that can better acquire the communication quality in the surroundings for control. Means for Solving the Problems

[0005] One aspect of the present disclosure is a moving body including a wireless communication unit and a control unit. The moving body is characterized in that the control unit performs: receiving, from a plurality of other moving bodies via the wireless communication unit, a communication quality message including position information and communication quality information at the position indicated by the position information; determining a destination based on the communication quality message; and prompting information related to the destination to a user.

[0006] Another aspect of the present disclosure is a moving body including a wireless communication unit and a control unit. The moving body is characterized in that the control unit performs: receiving, from a plurality of other moving bodies via the wireless communication unit, a communication quality message including position information and communication quality information at the position indicated by the position information; generating a communication quality map for each position based on the communication quality message; and searching for a path to a destination based on the communication quality map, and prompting the path to a user or moving along the path.

[0007] Another aspect of the present disclosure is a wireless communication device including a control unit. The control unit performs: receiving communication quality information from a plurality of other wireless communication devices; Select at least one wireless communication device from the plurality of other wireless communication devices based on the communication quality information; and Delegate a relay for communication via a base station for the selected other wireless communication device. Effects of the Invention

[0008] It is possible for a moving body and a wireless communication device to acquire the surrounding communication quality for control. Description of the Drawings

[0009] Figure 1 It is a diagram showing an outline of the system in the embodiment. Figure 2 It is a diagram showing the configuration of a vehicle (moving body) in the embodiment. Figure 3 It is a flowchart of the communication quality acquisition process implemented by the vehicle in the embodiment. Figure 4 It is a flowchart showing the process of the destination determination process in the first embodiment. Figure 5 It is a flowchart showing the process of the path search process in the second embodiment. Figure 6 It is a flowchart showing the process of the communication relay process in the third embodiment. Figure 7 It is a flowchart showing a modified example of the process of the communication relay process in the third embodiment. Detailed Description of the Invention

[0010] (Overview) In recent years, wireless communication has been able to perform high-capacity data transmission / reception. For example, under the 5G communication standard, high-speed and high-capacity communication of 10 Gbps or more can be performed. However, the communication quality of wireless communication fluctuates depending on the location, and in order to perform high-speed and high-capacity wireless communication, it is desirable to be in a location with good communication quality. Here, it is considered to find a location with good communication quality based on a graph representing statistical communication quality, but since the communication quality also changes over time, it is not always possible to find a location with good communication quality at that moment. In addition, a method of generating a communication quality map while the device measures the communication quality and moves is considered, but in this method, the communication quality of locations that the device has not experienced cannot be grasped, and the past communication quality is not necessarily the same as the communication quality at the current time point.

[0011] Therefore, an object of the present disclosure is to acquire the surrounding communication quality and perform control based on this.

[0012] The present disclosure includes, for example, the following methods: determining a location with good communication quality and presenting the location or a path to the location; searching for a path to a destination that passes through a location with good communication quality; and entrusting a device located at a location with good communication quality to relay communication.

[0013] One aspect of the present disclosure is a mobile body that includes a wireless communication unit and a control unit. The mobile body is characterized in that the control unit performs: receiving, via the wireless communication unit, communication quality messages from a plurality of other mobile bodies, the communication quality messages including location information and communication quality information at the location indicated by the location information; determining a destination based on the communication quality messages; and presenting information related to the destination to a user.

[0014] In this aspect, the control unit may use a location where the communication quality is equal to or higher than a specified standard as the destination. A typical example of information related to the destination is information related to the location of the destination. More specifically, it is the location of the destination itself or a path to the destination.

[0015] According to this aspect, the user of the mobile body can identify a location with good communication quality. For example, when performing high-capacity communication, if a location with good communication quality can be identified, high-capacity communication can be achieved by moving the mobile body to that location and then performing communication.

[0016] Another aspect of the present disclosure is a mobile body that includes a wireless communication unit and a control unit. The mobile body is characterized in that the control unit performs: receiving, via the wireless communication unit, communication quality messages from a plurality of other mobile bodies, the communication quality messages including location information and communication quality information at the location indicated by the location information; generating a communication quality map for each location based on the communication quality messages; and searching for a path to a destination based on the communication quality map, presenting it to a user, or moving along the path.

[0017] In this aspect, the control unit may also preferentially search for a path where the communication quality is equal to or higher than a specified standard based on the communication quality map. In addition, it is not necessary for the communication quality to be equal to or higher than the specified standard throughout the entire path. As long as the overall communication quality of the communication path meets the specified standard, it is also possible to search for a path that includes a portion with poor communication quality. Also, it is not necessary for the communication quality to be equal to or higher than the specified standard throughout the entire path, and it is also possible to search for a path where the communication quality meets the specified standard during a specified period (for example, a period when high-capacity communication is predicted to occur).

[0018] In this aspect, as the destination, it may be input by the user, or may be determined by the control unit based on the communication quality information received from other mobile bodies or based on the communication quality map generated from the communication quality information.

[0019] Another aspect of the present disclosure is a wireless communication device, which includes a control unit that performs: receiving communication quality information from a plurality of other wireless communication devices; selecting at least one wireless communication device from the plurality of other wireless communication devices based on the communication quality information; and commissioning the selected other wireless communication device to relay communication via a base station.

[0020] According to this aspect, by communicating via other wireless communication devices located in a location with good communication quality, the wireless communication device can perform high-capacity communication without moving to a location with good communication quality.

[0021] In the present disclosure, the communication quality can be, for example, received radio wave intensity, reception quality, signal-to-interference-plus-noise ratio, or communication throughput.

[0022] The present disclosure also includes a computer program for causing a computer to execute each step of the above method, and a computer program for implementing the above network node or information processing system using a computer. The present disclosure also includes a computer-readable medium storing the above computer program.

[0023] (Embodiment 1) Hereinafter, embodiments of the present disclosure will be described based on the drawings. The following embodiments are merely illustrative examples, and the present disclosure is not limited to the configurations of the embodiments. For example, an example of using mobile communication, particularly mobile communication based on the 5G standard, is described below, but mobile communication other than the 5G standard or wireless communication other than mobile communication can also be used.

[0024] <System Overview> Figure 1 This is a diagram for explaining the overview of the system according to this embodiment. This system includes a plurality of vehicles 100A to 100D. In addition, hereinafter, when it is not necessary to distinguish each vehicle, the vehicles are collectively referred to as vehicle 100.

[0025] Vehicle 100 has a wireless communication device corresponding to mobile communication (for example, 5G), and can perform communication via base station 200 and 5G Core System (5GCS), and direct communication between vehicles 100 via a direct link (SL).

[0026] Here, it is assumed that vehicle 100A is scheduled to perform high-capacity communication, but the current radio wave environment is not excellent, and it is considered to move to a location with good radio wave environment and communication quality for high-capacity communication. Therefore, vehicle 100A obtains information on communication quality from surrounding vehicles 100B to 100D, and moves to a location with good communication quality before performing high-capacity communication.

[0027] <Configuration> Figure 2 It is a diagram showing a configuration example of vehicle 100. Vehicle 100 includes a control unit 110, a wireless communication unit 120, and a GPS device 130.

[0028] The control unit 110 has a CPU 111 and a storage unit 112. By executing a computer program loaded into the storage unit 112 by the CPU 111, the functions described below are realized. The CPU 111 can be either one or multiple. Additionally, one CPU can also have multiple cores. The control unit 110 can also have other processors such as a GPU and a DSP in addition to the CPU. The storage unit 112 includes volatile memories such as RAM and non-volatile memories such as SSD, HDD, and flash memory. The control unit 110 can be understood as an information processing device or a computer.

[0029] The wireless communication unit 120 is, for example, a communication device corresponding to a mobile communication standard, and includes a signal oscillator, a modem, an amplifier, an antenna, etc. The wireless communication unit 120 corresponds to, for example, the 5G communication standard and is capable of communicating via a base station (gNB) 200 and directly communicating with other vehicles 100 through a direct link (SL).

[0030] The GPS device 130 is a device that performs positioning based on GPS satellite signals and can obtain the current position of vehicle 100.

[0031] <Process> Figure 3 It is a flowchart showing the process of a communication quality acquisition process regularly performed by vehicle 100. The execution interval of this process can be set to a fixed time interval (e.g., 1 second, 5 seconds, 10 seconds, 30 seconds, 1 minute, etc.), or it can be executed every time a fixed distance is traveled, or every time a specified trigger occurs, etc.

[0032] In step S301, the control unit 110 acquires the communication quality at the current moment. The communication quality can be the received radio wave intensity (e.g., reference signal received power (RSRP)), the received quality (e.g., reference signal received quality (RSRQ)), the signal-to-interference-plus-noise ratio (SINR) obtained from the wireless communication unit 120, or it can also be the end-to-end communication throughput that the control unit 110 can grasp.

[0033] In step S302, the control unit 110 acquires the position information of the current location from the GPS device 130. Additionally, the acquisition of the position information can also be obtained through sensors other than the GPS device 130, the analysis of camera images, etc.

[0034] In step S303, the control unit 110 stores the communication quality obtained in step S301 and the location information obtained in step S302 in the storage unit 112 in an associated manner.

[0035] Figure 4 It is a flowchart showing the process of the processing executed when the vehicle 100A performs high-capacity communication. In the following description, it is shown that the vehicle 100 performs the processing, but more precisely, it is the control unit 110 of the vehicle 100 that performs the processing.

[0036] When a request for high-capacity communication occurs in the vehicle 100A in step S401, Figure 4 the processing starts. In addition, the request for high-capacity communication includes not only the case of immediately starting communication but also the case of scheduling communication after a specified time.

[0037] In step S402, the vehicle 100A transmits a request message for requesting communication quality information to the surrounding vehicles 100B to 100D via the wireless communication unit 120. The identifier of the vehicle 100A and the current position of the vehicle 100A may be included in the request message. In the present embodiment, this request message is transmitted by direct link communication, but it may also be transmitted by communication via the base station 200.

[0038] In step S403, the vehicles 100B to 100D transmit the communication quality information stored in the storage unit 112 to the vehicle 100A in response to the reception of the request message. More specifically, the vehicles 100B to 100D transmit a communication quality message stored in the storage unit 112, which includes location information and the communication quality information at the location indicated by the location information, to the vehicle 100A. The transmitted communication quality information may be only the most recent measurement result, may be multiple measurement results within a recent specified period, or may be measurement results within a specified area (for example, within a specified distance from the current position of the vehicle 100A).

[0039] In step S404, vehicle 100A determines the location with good communication quality as the destination based on the obtained communication quality information. At this time, the communication quality information measured by vehicle 100A itself can also be used to determine the destination. In the present disclosure, "good communication quality" means, for example, that the communication quality meets a specified standard. As the "specified standard", it only needs to be above the communication quality required by vehicle 100A and can be any standard. For example, conditions such as the received radio wave intensity being above a specified intensity, the received quality being above a specified value, the signal-to-interference-plus-noise ratio being above a specified value, and the communication throughput being above a specified value can be adopted. In addition, when there are multiple locations that meet the specified standard, the destination can be determined based on other factors such as the distance from the current location of vehicle 100A. Alternatively, vehicle 100A can prompt the user with candidates for the destination, and the user makes the final determination.

[0040] In step S405, vehicle 100A searches for a path from the current location to the destination determined in step S404, and in step S406, the obtained path is prompted to the user. After the user determines to adopt the path, vehicle 100A starts to be guided along this path. In addition, when multiple destinations are obtained in step S404, the paths to each destination can also be prompted to the user so that the user inputs which destination and path to adopt. In addition, when vehicle 100A is an autonomous driving vehicle, the path can be changed or determined after obtaining the user's confirmation, or the path can be changed or determined without obtaining the user's confirmation.

[0041] <Beneficial effects> According to the present embodiment, it is possible to grasp the location with good communication quality including the location where the vehicle itself has not traveled, and move to this location for high-capacity communication. In addition, although the same effect can also be achieved by using a communication quality map generated based on statistical communication quality, since the communication quality changes over time, the communication quality shown in the map is not necessarily correct. In the present embodiment, since the communication quality obtained through the latest measurement is used, it is possible to grasp more accurate information.

[0042] (Embodiment 2) In Embodiment 1, the destination is determined based on the communication quality information, while in the present embodiment, in a manner where the destination is specified, the path to the destination is determined based on the communication quality information obtained from surrounding vehicles.

[0043] Overall configuration of the system ( Figure 1 ) and configuration of vehicle 100 ( Figure 2 ) and the process of obtaining and processing communication quality information in vehicle 100 ( Figure 3 ) are the same as those in Embodiment 1, and thus the description is omitted.

[0044] Figure 5 is a flowchart showing the process of processing executed when vehicle 100A starts moving toward a destination.

[0045] In step S501, a path search request to the destination is received from a user by vehicle 100A, and thus Figure 5 the processing starts. In addition, Figure 5 the processing can also be executed while traveling on a determined path.

[0046] In step S502, vehicle 100A transmits a request message for requesting communication quality information to surrounding vehicles 100B to 100D via wireless communication unit 120. The request message may include an identifier of vehicle 100A and the current position of vehicle 100A. In the present embodiment, the request message is transmitted by direct link communication, but may also be transmitted by communication via base station 200.

[0047] In step S503, vehicles 100B to 100D transmit the communication quality information stored in storage unit 112 to vehicle 100A in response to the reception of the request message. More specifically, vehicles 100B to 100D transmit a communication quality message stored in storage unit 112, which includes position information and communication quality information at the position indicated by the position information, to vehicle 100A. The transmitted communication quality information may be only the latest measurement result, may be a plurality of measurement results within a recent specified period, or may be measurement results within a specified area (for example, within a specified distance from the current position of vehicle 100A).

[0048] In step S504, vehicle 100A generates a communication quality map based on the obtained communication quality information. The communication quality map is a map showing the communication quality of each position or each road.

[0049] In step S505, vehicle 100A searches for a path to the destination based on the generated communication quality map, taking into account the communication quality on the path. The path search taking into account the communication quality is, for example, a search that preferentially searches for paths with a communication quality above a specified standard and excludes paths that do not meet the specified standard. By setting a large movement cost for roads that do not meet the specified standard, the above search can be achieved. In addition, various methods can be envisioned for the path search criteria. For example, a method based on the average communication quality of the entire path, and a method of searching for a path that does not pass through a place with a communication quality that is below the standard. The former is effective when performing a specified amount of communication, and the latter is effective when performing continuous communication. In addition, if the time period during which the communication quality needs to be ensured can be grasped in advance, it is only necessary to perform a path search that takes into account only the communication quality during that time period.

[0050] In step S506, the obtained path is prompted to the user. After the user determines to adopt the path, vehicle 100A starts to be guided along this path. Additionally, in the case where vehicle 100A is an autonomous driving vehicle, the path can be changed or determined after obtaining the user's confirmation, or the path can be changed or determined without obtaining the user's confirmation.

[0051] <Beneficial effects> According to the present embodiment, it is possible to grasp the positions with good communication quality including the positions where the vehicle itself has not traveled, and based on this, prompt a path with good communication quality to the destination. Since the vehicle travels on a path with good communication quality all the time (or during the necessary period) during the movement to the destination, the user can obtain a good experience of communication services.

[0052] (Embodiment 3) In Embodiments 1 and 2, examples of moving the moving body to a position with good communication quality considering the surrounding communication quality and examples of moving through positions with good communication quality are adopted. In the present embodiment, a scheme is proposed in which the device itself does not move but communicates via a wireless communication device existing in a position with good communication quality.

[0053] The overall configuration of the system in the present embodiment is as Figure 1 shown, which is the same as that in Embodiments 1 and 2, but the user terminal (wireless communication device) replaces the vehicle as a component of the system. It can be understood that the user terminal can be mounted on a vehicle or other moving body. Or, the user terminal can be carried by a person or fixed at a place. That is, the user terminal in the present embodiment can move or not move.

[0054] The user terminal in the present embodiment is the same as Figure 2 the vehicle 100 shown, and includes a control unit 110, a wireless communication unit 120, and a GPS device 130. In addition, the user terminal having these components can be understood as a wireless communication device.

[0055] The process of obtaining communication quality information in the user terminal in the present embodiment ( Figure 3 ) is omitted from description since it is the same as that in Embodiments 1 and 2.

[0056] Figure 6 is a flowchart showing the process of the processing executed when the user terminal performs a large-capacity communication. In the following description, it is shown that the user terminal performs the processing, but more precisely, it is the control unit 110 of the user terminal that performs the processing.

[0057] When a request for large-capacity communication occurs in the user terminal in step S601,Figure 6 The processing starts. In addition, requests for high-capacity communication include cases where communication is scheduled to be carried out after a specified time, in addition to cases where communication starts immediately. In addition, the necessity for high-capacity communication is only an example of the trigger for this processing, and any other communication start can also be the trigger for this processing.

[0058] In step S602, the user terminal A sends a Relay Discovery Solicitation message for the surrounding user terminals via the wireless communication unit 120. The Relay Discovery Solicitation message in this embodiment includes a parameter for requesting communication quality information. The Relay Discovery Solicitation message may also include the identifier of the user terminal A and the current position of the user terminal A. In this embodiment, this Relay Discovery Solicitation message is sent through direct link communication, but it can also be sent through communication via the base station 200.

[0059] In step S603, the user terminals B to D determine whether they can relay communication from other user terminals. If they can relay, they send a Relay Discovery Response message to the user terminal A. The Relay Discovery Response message includes communication quality information. More specifically, the communication quality information includes location information and the communication quality at the location indicated by the location information. The transmitted communication quality information can be only the most recent measurement result, or multiple measurement results within a recent specified period, or measurement results within a specified area (for example, within a specified distance from the current position of the user terminal A). The Relay Discovery Response message can also be understood as a communication quality message.

[0060] In step S604, the user terminal A determines, based on the communication quality information included in the Relay Discovery Response message, the user terminal that is in a state where it can relay and has good communication quality as the relay terminal. In the present disclosure, "good communication quality" means, for example, that the communication quality meets a specified standard. As the "specified standard", it can be any standard as long as it is above the communication quality required by the user terminal A. For example, conditions such as the received radio wave intensity being above a specified intensity, the received quality being above a specified value, the signal-to-interference-plus-noise ratio being above a specified value, and the communication throughput being above a specified value can be adopted. In addition, when there are multiple user terminals that meet the specified standard, the relay terminal can be determined according to other factors such as the distance from the current position of the user terminal A. Alternatively, the user terminal A can present candidates for the relay terminal to the user of the user terminal A for the user to make the final determination.

[0061] In step S605, the user terminal A commissions a relay terminal determined to be a relay for communication via the base station 200. In step S606, in response to the commission of the relay, the relay terminal transmits the commissioned communication to the base station 200. Further, when the relay terminal receives a response to the user terminal A from the base station 200, the relay terminal transmits the response to the user terminal A.

[0062] Figure 7 FIG. is a flowchart showing a process of processing according to a modification of the present embodiment. In the present embodiment, when each user terminal can perform relaying for communication, it transmits a Relay Discovery Announcement message to the surroundings (step S701). The Relay Discovery Announcement message includes communication quality information. The transmitted communication quality information may be only the most recent measurement result, or may be a plurality of measurement results within a recent specified period. This Relay Discovery Announcement message is transmitted by direct link communication, but may also be transmitted by communication via the base station 200.

[0063] In step S702, after a request for high-capacity communication occurs in the user terminal A, in step S704, a relay terminal is determined based on the received Relay Discovery Announcement message. Further, the user terminal A may also determine a relay terminal based on the Relay Discovery Announcement message received after a request for high-capacity communication occurs. The selection criteria for the relay terminal are the same as described above. In addition, the processing of steps S704 to S706 is the same as the processing of steps S604 to S606, and thus the description thereof is omitted.

[0064] <Advantageous Effects> According to the present embodiment, by performing communication via another wireless communication device located at a position with good communication quality between the base stations, the wireless communication device can perform high-capacity communication without moving to a position with good communication quality. In addition, load dispersion for dispersing the communication load of each user terminal can be performed. In particular, by selecting a user terminal with a high communication throughput as the communication quality as the relay terminal, load dispersion can be efficiently performed.

[0065] (Other Modifications) The above-described embodiment is merely an example, and the present disclosure can be appropriately modified and implemented without departing from its gist.

[0066] In the above-described embodiments, an example of mobile communication using the 5G standard (communication via a base station and direct link communication) is shown. However, wide-area wireless communication via a base station or an access point may be employed, and any standard communication may be used for direct communication between vehicles or user terminals. For wide-area wireless communication, examples include wide-area wireless LAN (IEEE 802.11ah), WiMax (IEEE 802.6), etc. For direct communication between vehicles or user terminals, examples include WiFi-Direct, Bluetooth (registered trademark), etc.

[0067] The present disclosure can also be implemented in the following manner: That is, a computer program installed with the functions described in the above-described embodiments is provided to a computer, and the program is read and executed by one or more processors included in the computer. Such a computer program can be provided to the computer via a non-temporary computer-readable storage medium connectable to the system bus of the computer, or can be provided to the computer via a network. The non-temporary computer-readable storage medium includes, for example, any type of disk such as a magnetic disk (floppy disk (registered trademark), hard disk drive (HDD), etc.), an optical disk (CD-ROM, DVD disk, Blu-ray disk, etc.), any type of medium suitable for storing electronic instructions such as a read-only memory (ROM), a random access memory (RAM), an EPROM, an EEPROM, a magnetic card, a flash memory, an optical card, etc. Description of reference numerals

[0068] 100 (100A to 100D): Vehicle 110: Control unit 111: CPU 112: Storage unit 120: Wireless communication device 130: GPS device 200: Base station

Claims

1. A mobile object comprising a wireless communication unit and a control unit, The moving body is characterized in that The control unit performs: receiving, by the wireless communication unit, from a plurality of other mobile objects, a communication quality message including position information and communication quality information at a position indicated by the position information; determining a destination based on the communication quality message; and The user is prompted with information related to the destination.

2. The mobile body according to claim 1, characterized in that: The control unit determines a location where the communication quality is higher than a predetermined standard as the destination.

3. The mobile body according to claim 1, characterized in that: The information related to the destination is a route to the destination.

4. The moving object according to claim 1, characterized in that The communication quality is reception radio wave strength, reception quality, signal to interference plus noise ratio, or communication throughput.

5. A mobile object comprising a wireless communication unit and a control unit, The moving body is characterized in that The control unit performs: receiving, by the wireless communication unit, from a plurality of other mobile objects, a communication quality message including position information and communication quality information at a position indicated by the position information; generating a communication quality map for each location based on the communication quality message; and Based on the communication quality map, a route to the destination is searched, and the user is presented with the route or moves along the route.

6. The moving object according to claim 5, characterized in that: The control unit performs: receiving a route search request including a destination from the user, sending a request message for the communication quality message to the other device in response to the path search request, A route to the destination is searched for using a communication quality map generated based on the communication quality information obtained through the request message, and the route is presented to the user.

7. The moving object according to claim 5, characterized in that: The control unit preferentially searches for a path having a communication quality higher than a predetermined standard based on the communication quality map.

8. The moving object according to claim 5, characterized in that: The control unit further executes: determining a location with good communication quality as the destination.

9. The moving object according to claim 5, characterized in that: The communication quality is reception radio wave strength, reception quality, signal to interference plus noise ratio, or communication throughput.

10. A wireless communication device comprising a control unit, The control unit performs: receiving communication quality information from a plurality of other wireless communication devices; selecting at least one wireless communication device from among the plurality of other wireless communication devices based on the communication quality information; and The selected other wireless communication device is requested to relay the communication via the base station.

11. The wireless communication device according to claim 10, characterized in that: The control unit performs: sending a request message for the communication quality information to the plurality of other wireless communication devices, At least one wireless communication device is selected from among the plurality of other wireless communication devices based on the communication quality information obtained through the request message.

12. The wireless communication device according to claim 10, characterized in that: The wireless communication device is a wireless communication device that performs mobile wireless communication.

13. The wireless communication device according to claim 10, wherein: Communication quality refers to received radio wave strength, reception quality, signal to interference plus noise ratio, or communication throughput. The control unit selects a wireless communication device that is optimal in received radio wave strength, received quality, signal to interference plus noise ratio, or communication throughput.

Images