JP7835306B2 - Wireless communication system, base station equipment, wireless communication method, and program - Google Patents

Description

This invention relates to a wireless communication system, a base station device, a wireless communication method, and a program.

In a wireless communication system in which a base station device and a mobile terminal communicate wirelessly, a technology is being considered in which a high-throughput area for communication by the mobile terminal is pre-defined, and data transmission and reception are initiated when the mobile terminal enters that area (see, for example, Non-Patent Document 1).

Satoshi Takaya, Toshiro Nakahira, Daisuke Murayama, Takayoshi Moriyama, "Proposal of Communication Time Control Technology for Power Saving in Terminals and Base Stations," IEICE Society Conference (2022.8, B-11-6)

Conventional technologies have a problem in that the high-throughput area for communication by mobile terminals is set commonly for multiple mobile terminals, making it impossible to optimize the communication traffic of the entire wireless communication system.

Embodiments of the present invention have been made in view of the above problems, and enable the optimization of the overall communication traffic of a wireless communication system in which a base station device and one or more mobile terminals perform wireless communication.

To solve the above problems, a wireless communication system according to an embodiment of the present invention is a wireless communication system in which a base station device and one or more mobile terminals perform wireless communication, comprising: an acquisition unit that acquires movement information including the current location, movement speed, and movement path information of the mobile terminal , and a request value including the amount of communication data of the mobile terminal and the communication completion time information ; a determination unit that determines a data transmission area for data transmission for each mobile terminal based on the movement information and the request value; and a data transmission unit that permits data transmission of the mobile terminal in the data transmission area determined for each mobile terminal and suppresses data transmission of the mobile terminal outside the data transmission area , wherein the determination unit predicts the relationship between the future time of the mobile terminal and throughput based on the movement information, and determines the data transmission area for the mobile terminal such that the mobile terminal completes the transmission of the amount of communication data by the communication completion time and the data transmission time of the mobile terminal or the power consumption of the mobile terminal is minimized.

According to an embodiment of the present invention, in a wireless communication system in which a base station device and one or more mobile terminals perform wireless communication, the communication traffic of the entire wireless communication system can be optimized.

This figure shows an example of the system configuration of the wireless communication system according to this embodiment. This figure shows an example of the functional configuration of the base station device according to this embodiment. This figure shows an example of the functional configuration of the wireless communication system according to this embodiment. This flowchart shows an example of processing in the wireless communication system according to this embodiment. This flowchart shows an example of the data transmission area determination process according to this embodiment. Figure (1) illustrates the process for determining the data transmission area according to this embodiment. Figure (2) illustrates the process for determining the data transmission area according to this embodiment. Figure (3) illustrates the process for determining the data transmission area according to this embodiment. This figure shows an example of the hardware configuration of the base station device and control device according to this embodiment.

Hereinafter, embodiments of the present invention (this embodiment) will be described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the embodiments described below.

<System Configuration>
Figure 1 shows an example of the system configuration of a wireless communication system according to this embodiment. The wireless communication system 1 includes, for example, a base station device 10, one or more mobile terminals 100a, 100b, ..., and a control device 20, etc. In the following description, when referring to any of the one or more mobile terminals 100a, 100b, ..., "mobile terminal 100" will be used. Also, the number of base station devices 10 and the number of mobile terminals 100 shown in Figure 1 are just examples. The number of base station devices 10 and the number of mobile terminals 100 may be one or more other numbers.

The wireless communication system 1 is a system in which a base station device 10 and one or more mobile terminals 100 communicate wirelessly. As a specific example, the wireless communication system 1 is a system that controls mobile terminals 100 (such as inventory management robots, surveillance robots, or vehicles) capable of scheduling their travel routes in a private space such as a factory or warehouse.

The base station device 10 is a wireless base station that communicates wirelessly with one or more mobile terminals 100 using a wireless communication method such as a wireless LAN (Local Area Network) or local 5G (5th Generation). Alternatively, the base station device 10 may communicate wirelessly with one or more mobile terminals 100 using a cellular communication network (e.g., 3G, 4G/LTE, 5G, 6G) or another wireless communication method.

The mobile terminal 100 is a radio station capable of wireless communication with the base station 10 within the communication area 11 of the base station 10. As a specific example, the mobile terminal 100 is a radio station capable of controlling the movement of, for example, an inventory management robot, a surveillance robot, or a vehicle.

The control device 20 is, for example, a device that controls the entire wireless communication system 1. The control device 20 is connected to one or more base station devices 10 included in the wireless communication system 1 so as to be able to communicate via wired or wireless communication. The control device 20 can also communicate with the mobile terminal 100 via the base station devices 10. The functions of the control device 20 may be provided in the base station devices 10, or they may be distributed between the control device 20 and the base station devices 10.

(Summary of the process)
The mobile terminal 100 can communicate wirelessly with the base station device 10 within the base station device 10's communication area 11. However, as the distance between the mobile terminal 100 and the base station device 10 increases, the transmission power of both the base station device 10 and the mobile terminal 100 increases, and the time required for data transmission also increases, resulting in the problem of increased power consumption of both the base station device 10 and the mobile terminal 100.

Therefore, for example, a high-speed communication area 12 is being considered in which the received power intensity of the mobile terminal 100 during wireless communication exceeds a predetermined value, enabling data transmission at a predetermined transmission rate or higher, and transmitting as much data as possible within the range of the high-speed communication area 12.

However, with conventional technology, the high-speed communication area 12 is set commonly for multiple mobile terminals 100, which presents a challenge in that it is not possible to optimize the communication traffic of the entire wireless communication system.

Therefore, the wireless communication system 1 according to this embodiment has a function to acquire movement information related to the movement of the mobile terminal 100 and request values related to communication of the mobile terminal 100, and to determine a data transmission area for data transmission for each mobile terminal 100 based on the movement information and request values.

Here, the movement information includes, for example, the current location, movement speed, movement route, and whether the movement route can be changed of the mobile terminal 100. Note that the information regarding whether the movement route can be changed may be included in the movement route information. Furthermore, the request value includes, for example, the amount of communication data requested by the mobile terminal 100 (or the application executed by the mobile terminal 100), and information regarding the communication completion time.

For example, the wireless communication system 1 predicts the future travel path 101a of the mobile terminal 100a based on the acquired travel information and requested values of the mobile terminal 100a, and determines a data transmission area 13a that satisfies the requested values on the travel path 101a. Similarly, the wireless communication system 1 predicts the future travel path 101b of the mobile terminal 100b based on the acquired travel information and requested values of the mobile terminal 100b, and determines a data transmission area 13b that satisfies the requested values on the travel path 101b.

Furthermore, the wireless communication system 1 permits data transmission by the mobile terminal 100 within a data transmission area determined for each mobile terminal 100, and suppresses data transmission by the mobile terminal 100 outside of that data transmission area. For example, the wireless communication system 1 permits data transmission by mobile terminal 100a within its data transmission area 13a, and suppresses data transmission by mobile terminal 100a outside of that area. Similarly, the wireless communication system 1 permits data transmission by mobile terminal 100b within its data transmission area 13b, and suppresses data transmission by mobile terminal 100b outside of that area.

Thus, the wireless communication system according to this embodiment can flexibly change the data transmission area 13 for data transmission for each mobile terminal 100, for example, in accordance with the communication request value of the mobile terminal 100.

Therefore, according to this embodiment, in a wireless communication system 1 in which a base station device 10 and one or more mobile terminals 100 perform wireless communication, the communication traffic of the entire wireless communication system 1 can be optimized.

<Functional Configuration>
Next, the functional configuration of the base station device 10 and the wireless communication system 1 according to this embodiment will be described.

(Functional configuration of base station equipment)
Figure 2 shows an example of the functional configuration of a base station device according to this embodiment. The base station device 10 includes a computer configuration, and by executing a predetermined program on the computer, it realizes the wireless communication unit 201, communication control unit 202, area control unit 203, data transmission unit 204, storage unit 205, and communication unit 206, etc. At least a part of each of the above functional configurations may be realized by hardware.

The wireless communication unit 201 uses the communication equipment provided in the base station device 10 to communicate wirelessly with one or more mobile terminals 100. The communication control unit 202 uses the wireless communication unit 201 to perform communication control (protocol control) to enable the base station device 10 to function as a wireless base station. Note that the wireless communication unit 201 and the communication control unit 202 may utilize the functional configuration of a known wireless base station.

The area control unit 203 includes, for example, an area setting unit 211, an acquisition unit 212, a determination unit 213, and a notification unit 214, and performs area control processing to control the data transmission area for each mobile terminal 100.

The area setting unit 211 executes an area setting process to set a high-speed communication area 12 in which the received power strength of the mobile terminal 100 is equal to or greater than a predetermined value P, and data transmission is possible at a predetermined transmission rate T or higher. For example, the area setting unit 211 sets the high-speed communication area 12 based on the measurement results of the received power strength measured in advance by a measuring instrument at multiple measurement points within the communication area 11 of the base station device 10. Alternatively, the area setting unit 211 may set the high-speed communication area 12 based on the calculation results obtained by radio wave propagation simulation or the like, of the received power strength at multiple terminal locations within the communication area 11.

The acquisition unit 212 performs an acquisition process to acquire movement information related to the movement of a mobile terminal 100 within the communication area 11 of the base station device 10, and request values related to communication of the mobile terminal 100. For example, the acquisition unit 212 acquires movement information and request values from the mobile terminal 100 using the wireless communication unit 201 and the communication control unit 202, etc. Alternatively, the acquisition unit 212 may acquire request values from the mobile terminal 100 using the wireless communication unit 201 and the communication control unit 202, etc., and acquire movement information of the mobile terminal 100 that has been previously stored in the storage unit 205, etc.

The determination unit 213, based on the mobile terminal 100's movement information and request values acquired by the acquisition unit 212, executes a data transmission area determination process for each mobile terminal 100, determining the data transmission areas 13a, 13b, etc., where data transmission will take place. The data transmission area determination process will be described later.

The notification unit 214 performs notification processing to notify the data transmission unit 204 and the mobile terminals 100, etc., of the data transmission area information for each mobile terminal 100 determined by the determination unit 213. For example, the notification unit 214 notifies mobile terminal 100a of the data transmission area 13a information for mobile terminal 100a determined by the determination unit 213. Similarly, the notification unit 214 notifies mobile terminal 100b of the data transmission area 13b for mobile terminal 100b determined by the determination unit 213.

The data transmission unit 204 executes data transmission processing that permits data transmission by the mobile terminal 100 in the data transmission area of the mobile terminal 100 notified by the notification unit 214, and suppresses data transmission by the mobile terminal 100 outside of the data transmission area. For example, the data transmission unit 204 permits data transmission by the mobile terminal 100a in the data transmission area 13a of the mobile terminal 100a, and suppresses data transmission by the mobile terminal 100a outside of the data transmission area 13a. Similarly, the data transmission unit 204 permits data transmission by the mobile terminal 100b in the data transmission area 13b of the mobile terminal 100b, and suppresses data transmission by the mobile terminal 100b outside of the data transmission area 13b.

Furthermore, the method for suppressing data transmission by the mobile terminal 100 outside the data transmission area may be any method. For example, the data transmission unit 204 may prohibit data transmission by the mobile terminal 100 outside the mobile terminal 100's data transmission area, or it may limit the throughput of data transmission by the mobile terminal 100. Alternatively, the data transmission unit 204 may restrict the data that the mobile terminal 100 can transmit outside the mobile terminal 100's data transmission area.

The storage unit 205 stores information such as the movement information and request values acquired by the acquisition unit 212, the high-speed communication area 12 set by the area setting unit 211, and the data transmission area for each mobile terminal 100 determined by the determination unit 213.

The communication unit 206 performs communication processing to communicate with the control device 20, etc., using the communication equipment provided in the base station device 10.

(Functional configuration of wireless communication system)
Figure 3 shows an example of the functional configuration of the wireless communication system according to this embodiment. The area control unit 203 described in Figure 2 may be provided by a control device 20 that can communicate with one or more base station devices 10a, 10b, ... as shown in Figure 3. Note that if the control device 20 is equipped with the area control unit 203, one or more base station devices 10a, 10b, ... do not need to have the area control unit 203.

The control device 20 has a computer configuration, and by executing a predetermined program on the computer, it realizes the communication unit 301, base station control unit 302, storage unit 303, and area control unit 203, etc. At least some of the above functional configurations may be realized by hardware.

The communication unit 301 uses the communication device provided by the control device 20 to perform communication processing with one or more base station devices 10a, 10b, ..., etc.

The base station control unit 302 controls one or more base station devices 10a, 10b, ... and the entire wireless communication system 1.

The area control unit 203 includes the same configuration as the area control unit 203 described in Figure 2 and performs area control processing to control the data transmission area for each mobile terminal 100. Since the processing of the area control unit 203 is basically the same as that of the area control unit 203 described in Figure 2, this explanation will focus on the differences from the area control unit 203 described in Figure 2.

The area setting unit 211 performs area setting processing for each of the one or more base station devices 10a, 10b, ... to set a high-speed communication area 12 in which the received power intensity of the mobile terminal 100 is equal to or greater than a predetermined value P, and data transmission is possible at a predetermined transmission rate T or greater.

The acquisition unit 212 performs an acquisition process to acquire movement information related to the movement of a mobile terminal 100 within the communication area 11 of each base station device 10, and request values related to the communication of the mobile terminal 100, via one or more base station devices 10a, 10b, ...

Based on the movement information of the mobile terminal 100 and the requested values acquired by the acquisition unit 212, the determination unit 213 executes a data transmission area determination process to determine the data transmission areas 13a, 13b, etc., for data transmission for each mobile terminal 100.

The notification unit 214 performs notification processing to notify one or more base station devices 10a, 10b, ... and the mobile terminals 100 of the data transmission area, etc., for each mobile terminal 100 determined by the determination unit 213.

One or more base station devices 10a, 10b, ... data transmission units 204 permit data transmission by the mobile terminal 100 within the data transmission area of the mobile terminal 100 notified by the control device 20, and suppress data transmission by the mobile terminal 100 outside of the data transmission area.

Thus, the area control processing that controls the data transmission area for each mobile terminal 100 may be performed by the base station device 10 or by the control device 20. Furthermore, the area control processing that controls the data transmission area for each mobile terminal 100 may be performed jointly by the base station device 10 and the control device 20.

<Processing Flow>
Next, the processing flow of the wireless communication method according to this embodiment will be described.

(Processing of wireless communication systems)
Figure 4 is a flowchart illustrating an example of the processing of the wireless communication system according to this embodiment. This processing shows, for example, an overview of the processing performed by the base station device 10 described in Figure 2, or the wireless communication system 1 described in Figure 3, in the wireless communication system 1 shown in Figure 1.

In step S401, the area setting unit 211 of the area control unit 203 sets a high-speed communication area 12 in which the received power strength is equal to or greater than a predetermined value P and data transmission is possible at a predetermined transmission rate T or higher. For example, the area setting unit 211 sets an area in which the received power strength is equal to or greater than a predetermined value P as the high-speed communication area 12, based on measurement results or the like that have been stored in advance in the storage unit 205.

In step S402, the acquisition unit 212 of the area control unit 203 acquires movement information related to the movement of mobile terminals 100 within the communication area 11 of the base station device 10, and request values related to communication of the mobile terminals 100. For example, the acquisition unit 212 acquires movement information and request values for each mobile terminal 100 from mobile terminals 100a, 100b, ...

In step S403, the determination unit 213 of the area control unit 203 determines a data transmission area for each mobile terminal 100 that has acquired movement information and request values. For example, the determination unit 213 determines the data transmission area 13a for mobile terminal 100a and the data transmission area 13b for mobile terminal 100b.

Preferably, the determination unit 213 determines the data transmission area for each mobile terminal 100 within the range of the high-speed communication area 12 determined in step S401. This is because, as mentioned above, the power consumption of the base station equipment 10 and the mobile terminal 100 increases outside the range of the high-speed communication area 12.

In step S404, the data transmission unit 204 determines whether the mobile terminal 100 is within the data transmission area. For example, the data transmission unit 204 determines whether mobile terminal 100a is within the data transmission area 13a of mobile terminal 100a, and whether mobile terminal 100b is within the data transmission area 13b of mobile terminal 100b.

If the mobile terminal 100 is within the data transmission area, the data transmission unit 204 permits data transmission by the mobile terminal 100. On the other hand, if the mobile terminal 100 is not within the data transmission area, the data transmission unit 204 suppresses data transmission by the mobile terminal 100. For example, the data transmission unit 204 restricts data transmission to the mobile terminal 100 outside the data transmission area to the minimum necessary communications (e.g., sending and receiving control information).

The wireless communication system 1 can dynamically change the data transmission area of one or more mobile terminals 100 by repeatedly executing the processes shown in steps S402 to S406 of Figure 4, for example.

(Data transmission area determination process)
Figure 5 is a flowchart showing an example of the transmission area determination process according to this embodiment. This process shows an example of the data transmission area determination process executed by the determination unit 213 of the area control unit 203 in step S403 of Figure 4. The determination unit 213 executes the process shown in Figure 4 for each of the mobile terminals 100 from which the acquisition unit 212 has acquired movement information and request values.

In step S501, the determination unit 213 calculates (or predicts) the relationship between future time and throughput based on the movement information acquired by the acquisition unit 212. Here, the movement information acquired by the acquisition unit 212 includes, as described above, the current location of the mobile terminal 100, its movement speed, its movement route, and whether the movement route can be changed. Note that the information on whether the movement route can be changed may be included in the movement route information. In addition, the request value acquired by the acquisition unit 212 includes the amount of communication data requested by the mobile terminal 100 (or the application executed by the mobile terminal 100), and information such as the communication completion time.

Figure 6 is a diagram (1) illustrating the data transmission area determination process according to this embodiment. Based on information such as the current position, speed, and path of the mobile terminal 100, the determination unit 213 determines the future path A601 of the mobile terminal 100, for example, as shown in Figure 6. The determination unit 213 also determines the relationship 603 between the future time when the mobile terminal 100 moves along path A601 and the throughput.

As an example, the area setting unit 211 may determine the throughput at each point on the travel path A based on the throughput measurement results, etc., that have been previously measured by a measuring instrument at multiple measurement points within the communication area 11 of the base station device 10. As another example, the area setting unit 211 may predict the throughput at each point on the travel path A based on the received power intensity measurement results, which have been previously measured by a measuring instrument at multiple measurement points within the communication area 11 of the base station device 10.

Furthermore, if the mobile terminal 100's travel path can be changed, the determination unit 213 determines the changed travel path B602 at a future time for the mobile terminal 100, for example, as shown in Figure 6. The determination unit 213 also determines the relationship 604 between the future time when the mobile terminal 100 travels along the changed travel path B602 and the throughput. If there are two or more changed travel paths, the determination unit 213 similarly determines the relationship between the future time and throughput for the other changed travel paths.

Preferably, the travel information acquired by the acquisition unit 212 includes information on the time of arrival at the destination, and the determination unit 213 determines the modified travel route within a range where the delay from the time of arrival at the destination is less than or equal to a predetermined value.

Now, let's return to Figure 5 and continue the explanation of the flowchart. In step S502, the determination unit 213 calculates the minimum time required to transmit the requested amount of data by the communication completion time, based on the relationship between the calculated future time and throughput.

Figure 7 is a diagram (2) illustrating the data transmission area determination process according to this embodiment. The determination unit 213 determines the minimum time t1 required to transmit the amount of communication data by the communication completion time requested by the mobile terminal 100 (or application) from the relationship 603 between the future time when the mobile terminal 100 moves along the travel path A601 and the throughput. For example, as shown in Figure 7, the determination unit 213 determines the minimum time t1 required to transmit the amount of communication data by the communication completion time from the period with the highest throughput in the relationship 603 between the future time when the mobile terminal 100 moves along the travel path A601 and the throughput.

Similarly, the determination unit 213 determines the minimum time t2 required to transmit the amount of communication data by the communication completion time requested by the mobile terminal 100, based on the relationship 604 between the future time when the mobile terminal 100 moves along the travel path B602 and the throughput. For example, as shown in Figure 7, the determination unit 213 determines the minimum time t2 required to transmit the amount of communication data by the communication completion time from the period with the highest throughput in the relationship 604 between the future time when the mobile terminal 100 moves along the travel path B602. Preferably, if the period with the highest throughput in the relationship 604 between the future time and the throughput is long or there are multiple such periods, the determination unit 213 determines the minimum time t2 in such a way that data transmission is completed as quickly as possible.

Furthermore, if there are two or more modified travel routes, the determination unit 213 similarly determines the minimum time required to transmit the amount of communication data by the communication completion time requested by the mobile terminal 100, based on the relationship between future time and throughput, for the other modified travel routes as well.

Now, let's return to Figure 5 and continue the explanation of the flowchart. In step S503, the determination unit 213 determines the data transmission area in which the mobile terminal 100 will transmit data, based on the calculated minimum times t1, t2, ... For example, if the minimum time t2 is the shortest of the calculated minimum times t1, t2, ... the determination unit 213 sets the area 702 on the travel path B602 in Figure 7, which corresponds to the minimum time t2, as the data transmission area 13 for the mobile terminal 100.

If it is not possible to change the travel route, the determination unit 213 sets the area 701 corresponding to the minimum time t1 on the travel route A601 of the mobile terminal 100 as the data transmission area 13 of the mobile terminal 100.

In step S504, the decision unit 213 determines whether there are any mobile terminals that require a change in the travel route. If there are mobile terminals that require a change in the travel route, the decision unit 213 executes the process in step S505. On the other hand, if there are no mobile terminals that require a change in the travel route, the decision unit 213 terminates the process shown in Figure 5.

When the process moves to step S505, the decision unit 213 uses the notification unit 214 to notify the mobile terminal 100 that needs to change its travel route of the changed travel route. Upon receiving the notification, the mobile terminal 100 changes its travel route.

As explained in step S501, the modified travel route B602 is only determined if the mobile terminal 100 can change its travel route. Therefore, the mobile terminal 100, upon being notified of the modified travel route, can change its travel route according to the notification.

For the sake of simplicity, the above explanation describes an example where there is one mobile terminal 100 and one base station device 10. However, the number of mobile terminals 100 and base station devices 10 may be two or more.

For example, when multiple mobile terminals 100 move across multiple base station devices 10, the wireless communication system 1 (base station device 10 or control device 20) creates a correspondence table 800, such as the one shown in Figure 8, in step S403 of Figure 4.

For example, the determination unit 213 performs a data transmission area determination process for the mobile terminal 100a, calculates the minimum time (communication time) X1, X2, X3, ... for multiple travel routes A, B, C, ... and stores it in the correspondence table 800.

Similarly, the determination unit 213 performs a data transmission area determination process for other mobile terminals 100b, and determines the minimum times (communication times) Y1, Y2, Y3, ... for multiple travel routes A, B, C, ... and stores them in the correspondence table 800. If there is a travel route that cannot transmit the requested amount of communication data by the communication completion time, the determination unit 213 stores "x" in the correspondence table 800 instead of the minimum time, indicating that the data cannot be transmitted by the communication completion time. Furthermore, the determination unit 213 similarly stores the minimum time or "x" for other mobile terminals 100c, ...

Based on the created correspondence table 800, the determination unit 213 determines the data transmission area 13 for each mobile terminal 100, starting with the travel route that allows data transmission to be completed by the communication completion time and has the shortest travel time.

As a result, the determination unit 213 can determine the data transmission area for the multiple mobile terminals 100 so that the multiple mobile terminals 100 can complete the transmission of the requested amount of communication data by the communication completion time, and the data transmission time (or power consumption) of the multiple mobile terminals 100 is minimized.

<Hardware Configuration>
Figure 9 shows an example of the hardware configuration of a base station device and a control device according to this embodiment. The base station device 10 and the control device 20 have, for example, the hardware configuration of a computer 900 as shown in Figure 9. In the example of Figure 9, the computer 900 has a processor 901, memory 902, storage device 903, communication device 904, input device 905, output device 906, and bus B, etc.

The processor 901 is a computing device such as a CPU (Central Processing Unit) that realizes various functions by executing a predetermined program. The memory 902 is a storage medium that can be read by the computer 900, and includes, for example, RAM (Random Access Memory), ROM (Read Only Memory), etc. The storage device 903 is a storage medium that can be read by the computer, and may include, for example, an HDD (Hard Disk Drive), an SSD (Solid State Drive), various optical discs, and magneto-optical discs, etc.

The communication device 904 includes one or more hardware components (transmitting and receiving devices) for communicating with other devices via a wireless or wired network. The input device 905 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 906 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 905 and the output device 906 may be configured as an integrated unit (e.g., an input/output device such as a touch panel display).

Bus B is connected to all of the above components in common and transmits, for example, address signals, data signals, and various control signals. Note that the processor 901 is not limited to a CPU, but may be, for example, a DSP (Digital Signal Processor), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array).

(supplement)
In this embodiment, the base station device 10 and the control device 20 are not limited to being implemented as dedicated devices, but may also be implemented using a general-purpose computer. In that case, the program for implementing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be loaded into a computer system and executed. Here, "computer system" includes hardware such as the OS and peripheral devices.

Furthermore, "computer-readable recording media" includes various storage devices such as flexible disks, magneto-optical disks, ROMs, CD-ROMs, and hard disks built into computer systems. Moreover, "computer-readable recording media" may also include those that dynamically hold programs for a short period, such as communication lines used when transmitting programs via networks like the Internet or telephone lines, and those that hold programs for a fixed period, such as volatile memory within computer systems acting as servers or clients in such cases.

Furthermore, the above program may be intended to implement only a part of the functions described above, or it may be intended to implement the aforementioned functions in combination with programs already recorded in the computer system, or it may be implemented using hardware such as a PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array).

<Effects of the embodiment>
According to this embodiment, in a wireless communication system 1 in which a base station device 10 and one or more mobile terminals 100 perform wireless communication, the overall communication traffic of the wireless communication system 1 can be optimized.

For example, the wireless communication system 1 can flexibly change the data transmission area 13 to which data is transmitted in response to a request from the mobile terminal 100. This allows the wireless communication system 1 to satisfy the communication requirements of the mobile terminal 100 (or the application executed by the mobile terminal 100) even when those requirements change.

Furthermore, the wireless communication system 1 can satisfy the communication requirements of each mobile terminal 100, even in environments where multiple types of mobile terminals 100 request various communication requirements.

Furthermore, the wireless communication system 1 can effectively utilize the wireless communication resources in space. For example, the wireless communication system 1 can suppress interference between adjacent base station devices 10.

<Summary of Embodiments>
This specification discloses at least the following wireless communication systems, base station equipment, wireless communication methods, and programs:
(Section 1)
A wireless communication system in which a base station device and one or more mobile terminals perform wireless communication,
An acquisition unit that acquires movement information related to the movement of the mobile terminal and request values related to communication of the mobile terminal,
A determination unit that determines a data transmission area for data transmission for each mobile terminal based on the movement information and the requested value,
A data transmission unit that permits data transmission from the mobile terminal within the data transmission area determined for each mobile terminal, and suppresses data transmission from the mobile terminal outside the data transmission area,
A wireless communication system having the following features.
(Section 2)
The aforementioned movement information includes the current location, speed, and route of the mobile terminal.
The determination unit predicts the relationship between the future time of the mobile terminal and throughput based on the movement information, and determines the data transmission area based on the prediction result.
The wireless communication system described in paragraph 1.
(Section 3)
The aforementioned request value includes information on the amount of communication data and the time of communication completion.
The determination unit determines the data transmission area so that the amount of communication data can be transmitted by the time the communication is completed.
A wireless communication system as described in paragraph 1 or 2.
(Section 4)
The wireless communication system includes a plurality of base station devices and a plurality of mobile terminals capable of wireless communication with the plurality of base station devices.
The determination unit determines the data transmission area of the plurality of mobile terminals such that the plurality of mobile terminals complete the transmission of the amount of communication data by the communication completion time and the data transmission time of the plurality of mobile terminals or the power consumption of the plurality of mobile terminals is minimized.
The wireless communication system described in paragraph 3.
(Section 5)
The mobile terminal has an area setting unit that sets a high-speed communication area where the received power intensity of the mobile terminal is above a predetermined value and data transmission is possible at a predetermined transmission rate or higher,
The determination unit determines the data transmission area within the range of the high-speed communication area.
A wireless communication system as described in any of paragraphs 1 to 4.
(Section 6)
A base station device that performs wireless communication with one or more mobile terminals,
An acquisition unit that acquires movement information related to the movement of the mobile terminal and request values related to communication of the mobile terminal,
A determination unit that determines a data transmission area for data transmission for each mobile terminal based on the movement information and the requested value,
A data transmission unit that permits data transmission from the mobile terminal within the data transmission area determined for each mobile terminal, and suppresses data transmission from the mobile terminal outside the data transmission area,
A base station device having the following features.
(Section 7)
A computer that controls a wireless communication system in which a base station device and one or more mobile terminals communicate wirelessly,
A process for obtaining movement information related to the movement of the mobile terminal and request values related to communication of the mobile terminal,
A process to determine a data transmission area for data transmission for each mobile terminal based on the aforementioned movement information and the aforementioned request value,
A process that allows data transmission from the mobile terminal within the data transmission area determined for each mobile terminal, and suppresses data transmission from the mobile terminal outside the data transmission area,
A wireless communication method for performing this task.
(Section 8)
A storage medium containing a program that causes a computer to execute the wireless communication method described in paragraph 7.

Although this embodiment has been described above, the present invention is not limited to this specific embodiment, and various modifications and changes are possible within the scope of the gist of the invention as described in the claims.

1 Wireless communication system 10 Base station equipment 20 Control device 11 Communication area 12 High-speed communication area 13, 13a, 13b Data transmission area 100, 100a, 100b Mobile terminal 204 Data transmission unit 212 Acquisition unit 213 Determination unit

Claims (6)

A wireless communication system in which a base station device and one or more mobile terminals communicate wirelessly,
An acquisition unit that acquires movement information including the current location, speed, and route of the mobile terminal, and a requested value including the amount of communication data of the mobile terminal and the time of completion of communication .
A determination unit that determines a data transmission area for data transmission for each mobile terminal based on the aforementioned movement information and the aforementioned request value,
A data transmission unit that permits data transmission from the mobile terminal within the data transmission area determined for each mobile terminal, and suppresses data transmission from the mobile terminal outside the data transmission area,
It has,
The aforementioned determination unit,
Based on the aforementioned movement information, the relationship between the future time of the mobile terminal and its throughput is predicted.
The mobile terminal determines the data transmission area of the mobile terminal such that it completes the transmission of the amount of communication data by the time of completion of the communication and minimizes the data transmission time of the mobile terminal or the power consumption of the mobile terminal.
Wireless communication system. The wireless communication system includes a plurality of base station devices and a plurality of mobile terminals capable of wireless communication with the plurality of base station devices.
The determination unit determines the data transmission area of the plurality of mobile terminals such that the plurality of mobile terminals complete the transmission of the amount of communication data by the communication completion time and the data transmission time of the plurality of mobile terminals or the power consumption of the plurality of mobile terminals is minimized.
The wireless communication system according to claim 1 . The mobile terminal has an area setting unit that sets a high-speed communication area where the received power intensity of the mobile terminal is above a predetermined value and data transmission is possible at a predetermined transmission rate or higher,
The determination unit determines the data transmission area within the range of the high-speed communication area.
The wireless communication system according to claim 1 or 2 . A base station device that performs wireless communication with one or more mobile terminals,
An acquisition unit that acquires movement information including the current location, speed, and route of the mobile terminal, and a requested value including the amount of communication data of the mobile terminal and the time of completion of communication .
A determination unit that determines a data transmission area for data transmission for each mobile terminal based on the aforementioned movement information and the aforementioned request value,
A data transmission unit that permits data transmission from the mobile terminal within the data transmission area determined for each mobile terminal, and suppresses data transmission from the mobile terminal outside the data transmission area,
It has,
The aforementioned determination unit,
Based on the aforementioned movement information, the relationship between the future time of the mobile terminal and its throughput is predicted.
The mobile terminal determines the data transmission area of the mobile terminal such that it completes the transmission of the amount of communication data by the time of completion of the communication and minimizes the data transmission time of the mobile terminal or the power consumption of the mobile terminal.
Base station equipment. A computer that controls a wireless communication system in which a base station device and one or more mobile terminals communicate wirelessly,
A process to obtain movement information including the current location, speed, and route of the mobile terminal, and a request value including the amount of communication data and the time of completion of communication of the mobile terminal.
A determination process that determines a data transmission area for which data transmission will be performed for each mobile terminal, based on the aforementioned movement information and the aforementioned request value,
A process that allows data transmission from the mobile terminal within the data transmission area determined for each mobile terminal, and suppresses data transmission from the mobile terminal outside the data transmission area,
Execute ,
The aforementioned decision process is,
Based on the aforementioned movement information, the relationship between the future time of the mobile terminal and its throughput is predicted.
The mobile terminal determines the data transmission area of the mobile terminal such that it completes the transmission of the amount of communication data by the time of completion of the communication and minimizes the data transmission time of the mobile terminal or the power consumption of the mobile terminal.
Wireless communication method. A program that causes a computer to execute the wireless communication method described in claim 5 .