JP7104192B1 - Control devices, programs, and control methods - Google Patents

Abstract

A control device, a program, and a control method that contribute to improving user experience by improving communication speed in a satellite mobile communication system. A control device for controlling communication by a satellite that provides wireless communication services to wireless communication terminals on the ground, comprising: an allocating unit for allocating communication resources to wireless communication terminals; a bandwidth setting unit for setting a minimum bandwidth of communication resources to be allocated to the wireless communication terminal by the allocation unit. The allocation unit allocates communication resources to the wireless communication terminals according to a first communication scheme and a second communication scheme different from the first communication scheme. The bandwidth setting unit sets the bandwidth for using the first communication method and the bandwidth for using the second communication method according to the application of communication of the wireless communication terminal. [Selection drawing] Fig. 1

Description

The present invention relates to control devices, programs, and control methods.

Patent Document 1 describes a mobile communication system of a satellite mobile communication system via an artificial satellite.
[Prior art literature]
[Patent Document]
[Patent Document 1] Japanese Unexamined Patent Publication No. 2014-064219

According to one embodiment of the present invention, a control device is provided. The control device may control the communication by the satellite that provides the wireless communication service to the wireless communication terminal on the ground. The control device may include an allocation unit that allocates communication resources to the wireless communication terminal. The control device may include a bandwidth setting unit that sets the minimum bandwidth of the communication resource allocated to the wireless communication terminal by the allocation unit according to the communication application of the wireless communication terminal.

The allocation unit may allocate communication resources to the wireless communication terminal according to the eMTC, and the bandwidth setting unit sets the minimum bandwidth from 15 when the communication use of the wireless communication terminal is to transmit sensor data. The minimum bandwidth may be in the range of 180 to 1080 kHz when the communication of the wireless communication terminal is used for transmission of voice data or image data. The bandwidth setting unit sets the minimum bandwidth when the communication of the wireless communication terminal is used for transmitting sensor data and the amount of sensor data transmitted by the wireless communication terminal is less than a predetermined threshold value. When the transmission amount is 15 kHz and the transmission amount is larger than the threshold value, the minimum bandwidth may be increased by the 15 kHz width as the transmission amount is larger. When the purpose of communication of the wireless communication terminal is to transmit voice data or image data, the bandwidth setting unit sets the transmission amount of the voice data or image data by the wireless communication terminal from a predetermined threshold value. If it is small, the minimum bandwidth may be 180 kHz, and if the transmission amount is larger than the threshold value, the larger the transmission amount, the more the minimum bandwidth may be increased by 180 kHz. The allocation unit may allocate communication resources to the wireless communication terminal according to the first communication method and the second communication method different from the first communication method, and the bandwidth setting unit may allocate the communication resource to the wireless communication. The bandwidth using the first communication method and the bandwidth using the second communication method may be set according to the communication use of the terminal. The first communication method may be eMTC, and the second communication method may be NB-IoT. When the communication use of the wireless communication terminal is the transmission of sensor data, the bandwidth setting unit widens the bandwidth using the second communication method, and the communication use of the wireless communication terminal is voice data. Alternatively, in the case of transmission of image data, the bandwidth using the first communication method may be increased.

According to one embodiment of the present invention, a control device is provided. The control device may control the communication by the satellite that provides the wireless communication service to the wireless communication terminal on the ground. The control device may include an allocation unit that allocates communication resources to the wireless communication terminal according to the first communication method and the second communication method different from the first communication method. The control device may include a bandwidth setting unit that sets a bandwidth using the first communication method and a bandwidth using the second communication method according to the communication application of the wireless communication terminal.

The first communication method may be eMTC, and the second communication method may be NB-IoT. When the communication use of the wireless communication terminal is the transmission of sensor data, the bandwidth setting unit widens the bandwidth using the second communication method, and the communication use of the wireless communication terminal is voice data. Alternatively, in the case of transmission of image data, the bandwidth using the first communication method may be increased.

According to one embodiment of the present invention, a program for causing a computer to function as the control device is provided.

According to one embodiment of the present invention, there is provided a control method executed by a control device that controls communication by a satellite that provides a wireless communication service to a wireless communication terminal on the ground. The control method may include a setting stage for setting the minimum bandwidth of the communication resource allocated to the wireless communication terminal according to the communication application of the wireless communication terminal. The control method may include an allocation stage for allocating communication resources to wireless communication terminals with the minimum bandwidth set in the setting stage.

According to one embodiment of the present invention, there is provided a control method executed by a control device that controls communication by a satellite that provides a wireless communication service to a wireless communication terminal on the ground. The control method is a setting for setting a bandwidth using the first communication method and a bandwidth using the second communication method, which is more restrictive than the first communication method, according to the communication application of the wireless communication terminal. It may have stages. The control method may include an allocation stage for allocating communication resources to wireless communication terminals with the bandwidth set in the setting stage.

The outline of the above invention does not list all the necessary features of the present invention. Sub-combinations of these feature groups can also be inventions.

An example of the system 10 is shown schematically. It is explanatory drawing for demonstrating the difference between the existing bandwidth setting and the bandwidth determination in a system 10. It is explanatory drawing for demonstrating the difference between the existing bandwidth setting and the bandwidth determination in a system 10. An example of the existing data transmission bandwidth 510 and the data transmission bandwidth 520 in the system 10 is schematically shown. The physical channel processing 600 for explaining one implementation example of the bandwidth setting in the system 10 is schematically shown. An example of the functional configuration of the control device 100 is shown schematically. An example of the hardware configuration of the computer 1200 functioning as the control device 100 or the control device 300 is shown schematically.

A satellite IoT service that provides an IoT (Internet of Things) service by a satellite mobile communication system is known. The existing satellite IoT service allocates frequencies for each service, but the system bandwidth cannot be changed for each communication method according to the demand. The system 10 according to the present embodiment provides a technique for contributing to the improvement of the user's experience by improving the communication speed by effectively utilizing the frequency band.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the inventions that fall within the scope of the claims. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention.

FIG. 1 schematically shows an example of the system 10. The system 10 includes a control device 100. System 10 may include satellite 200.

The control device 100 may control the satellite 200. The satellite 200 provides a wireless communication service to the wireless communication terminal 40 on the ground. The control device 100 may control the communication by the satellite 200.

The control device 100 may be arranged in the network 20. The network 20 may include a mobile communication network. The mobile communication network complies with any of the LTE (Long Term Evolution) communication system, the 5G (5th Generation) communication system, the 3G (3rd Generation) communication system, and the 6G (6th Generation) communication system or later. May be good. Here, a case where the mobile communication network complies with the LTE communication method will be described mainly as an example. The network 20 may include the Internet.

The control device 100 may communicate with the satellite 200 via the gateway 30. The control device 100 may control the satellite 200 by transmitting an instruction to the control device 300 of the satellite 200.

The wireless communication terminal 40 may be any communication terminal as long as it can communicate with the satellite 200. The wireless communication terminal 40 may be a so-called IoT (Internet of Thing) terminal. The wireless communication terminal 40 may include anything corresponding to the so-called IoT (Internet of Everything). The wireless communication terminal 40 may be a mobile phone such as a smartphone. The wireless communication terminal 40 may be a sensor that transmits sensor data. The wireless communication terminal 40 may be a tablet terminal, a PC (Personal Computer), or the like.

Here, a communication service provided to an IoT terminal using a satellite (may be described as satellite IoT) and a communication service provided to an IoT terminal using a terrestrial radio base station (may be described as terrestrial IoT). There is.) Explain the difference. Compared to the terrestrial IoT, the satellite IoT has a characteristic that there is little difference in the radio wave environment regardless of whether the wireless communication terminal 40 is located near the center of the cover area or at the edge of the cover area. .. For example, in the case of ground IoT, the difference may be about 50 dB near the center and the end of the cover area, whereas in the case of satellite IoT, it is about 3 dB near the center and the end of the cover area. It may be a difference. Further, in the case of terrestrial IoT, the monthly fixed charge is often charged, whereas in the case of satellite IoT, the monthly charge is often charged.

From the above, for example, in terrestrial IoT, the frequency utilization efficiency of the uplink depends on the position of the wireless communication terminal 40 and the required bandwidth. On the other hand, in the satellite IoT, the maximum transmission power of the wireless communication terminal 40 is constant, and the frequency utilization efficiency of the uplink depends on the required bandwidth except in the case of rainfall attenuation. In the satellite IoT, when the bandwidth is set to, for example, 1080 kHz, the communication speed becomes high, but since the bandwidth is wide, the power density becomes low and the frequency utilization efficiency becomes low. On the other hand, when the bandwidth is set to, for example, 15 kHz, the communication speed becomes slower, but the frequency utilization efficiency becomes higher. As described above, in the satellite IoT, the balance between the communication speed (frequency utilization efficiency and bandwidth) and the line unit price is important for providing the service as compared with the terrestrial IoT.

As so-called cellular IoT communication standards, eMTC (enhanced Machine Type Communication) and NB-IoT (Narrow Band-IoT) are known. Table 1 shows a comparison between the satellite IoT by eMTC (sometimes referred to as satellite eMTC) and the satellite IoT by NB-IoT (sometimes referred to as satellite NB-IoT).

In the current eMTC, PUSCH (Physical Uplink Shared Channel), that is, the bandwidth for data transmission corresponds to 180 to 1080 kHz. The PRACH (Physical Random Access Channel) is 1080 kHz, and the PUCCH (Physical Random Control Channel) is 180 kHz. In the current NB-IoT, PUSCH is 15 to 180 kHz.

The advantages of the satellite eMTC are that it has a wide bandwidth and high communication speed, that voice calls are possible, and that it is strong in mobility. Disadvantages of the satellite eMTC are that the bandwidth is wide, so the power density is low and the frequency utilization efficiency is low (the line unit price is relatively high). One of the merits of the satellite NB-IoT is that the frequency utilization efficiency is high (the line unit price is low). Disadvantages of the satellite NB-IoT include a narrow bandwidth, slow communication speed, and limited service.

In the system 10 according to the present embodiment, two solutions can be introduced in order to contribute to solving the problem in the satellite IoT. The first solution is to dynamically determine the bandwidth for eMTC and NB-IoT. At present, the bandwidth for eMTC and NB-IoT is fixed, but by dynamically switching, the mutual disadvantages of the satellites eMTC and NB-IoT can be complemented.

The second solution is to support bandwidth for data transmission up to a minimum of 15 kHz in eMTC. In the current eMTC, the minimum bandwidth for data transmission is 180 kHz, but by setting this to 15 kHz, frequency utilization efficiency can be improved, and low-cost / low-speed IoT communication services can be provided on the satellite eMTC. can do.

System 10 may introduce both a first solution and a second solution. Further, the system 10 may introduce only one of the first solution and the second solution.

2 and 3 are explanatory diagrams for explaining the difference between the existing bandwidth setting and the bandwidth determination in the system 10. As shown in the bandwidth 410 of FIG. 2, at present, for example, 1080 kHz is fixedly assigned to eMTC and 180 kHz is fixedly assigned to NB-IoT. For each of the uplink and the downlink, the allocation as shown in the uplink allocation 412 and the downlink allocation 414 is made.

On the other hand, in the system 10, the bandwidth is dynamically determined for eMTC and NB-IoT. The bandwidth 420 in FIG. 3 illustrates a state in which 720 kHz is assigned to eMTC and 540 kHz is assigned to NB-IoT. For each of the uplink and the downlink, the allocation as shown in the uplink allocation 422 and the downlink allocation 424 is performed.

The system 10 allocates one band to the Anchor carrier for transmitting both system information and user data, and may increase or decrease the number of Non anchor carriers for transmitting user data as needed.

In IoT communication, the number of sensor data transmissions is usually large, and large-capacity communication such as voice data and image data transmission and FOTA (Fireware Over The Air) is often generated at an arbitrary timing. According to the system 10 according to the present embodiment, for example, transmission of audio data and image data, FOTA, etc., which enhance frequency utilization efficiency by setting a wide bandwidth of NB-IoT, have occurred. Correspondingly, it is possible to adapt to such an environment by increasing the bandwidth allocation to the eMTC.

FIG. 4 schematically shows an example of an existing data transmission bandwidth 510 in the eMTC and a data transmission bandwidth 520 in the system 10. As shown in the data transmission bandwidth 510, the existing eMTC supports a minimum of 180 kHz as the data transmission bandwidth.

In the system 10 according to the present embodiment, as shown in the data transmission bandwidth 520, the minimum data transmission bandwidth corresponds to 15 kHz. As a result, the frequency utilization efficiency of the uplink can be improved as compared with the existing eMTC, so that the satellite eMTC can also provide a low-priced IoT communication service according to the use case.

In addition, compared to the existing NB-IoT, the downlink enables large-capacity IoT communication services such as FOTA, and it is possible to make voice calls as needed even though it is a low-priced IoT service. Moreover, since it is based on eMTC, the accommodation efficiency can be improved as compared with the NB-IoT single service.

FIG. 5 schematically shows LTE channel processing 600 for explaining an implementation example of bandwidth setting in the system 10. In the system 10, for example, in the LTE channel processing 600, the minimum bandwidth of the communication resource allocated to the wireless communication terminal 40 is set to 15 kHz by adjusting the Scheduler.

The system 10 may dynamically change the minimum bandwidth, for example. The system 10 has, for example, 30 kHz, 45 kHz, 60 kHz, etc., depending on the amount of data when the amount of data transmitted by the wireless communication terminal 40 is larger than a predetermined threshold value based on 15 kHz. In addition, the minimum bandwidth can be changed in 15 kHz increments.

The system 10 may adjust the minimum bandwidth of the eMTC while adjusting the bandwidth of the eMTC and the NB-IoT. For example, the system 10 adjusts the bandwidths of the eMTC and NB-IoT according to the communication application of the wireless communication terminal 40. As a specific example, when the system 10 determines that the communication use of the wireless communication terminal 40 is the transmission of sensor data, the system 10 widens the bandwidth of the NB-IoT, and the communication use of the wireless communication terminal 40 is the image data and When it is determined that the data is audio data, the bandwidth of the eMTC is widened. The system 10 may control a part of the plurality of sensor data to be handled by the NB-IoT, and the other part of the plurality of sensor data and the image data and the audio data to be handled by the eMTC. Further, the system 10 sets the minimum bandwidth to 15 kHz while the amount of sensor data handled by the eMTC is less than a predetermined threshold value, and when it is larger than the threshold value, the system 10 sets the minimum bandwidth in 15 kHz units according to the amount of data. Change the minimum bandwidth.

FIG. 6 schematically shows an example of the functional configuration of the control device 100. The control device 100 includes a communication management unit 102, an information acquisition unit 104, an allocation unit 106, and a bandwidth setting unit 108.

The communication management unit 102 manages communication by the wireless communication terminal 40 via the satellite 200. The communication management unit 102 can control the establishment and disconnection of the communication connection with the wireless communication terminal 40, the allocation of resources, the relay, and the like.

The information acquisition unit 104 acquires information related to the communication of the wireless communication terminal 40 from the communication management unit 102. The information acquisition unit 104 acquires, for example, information indicating the amount of data to be transmitted by the wireless communication terminal 40. The information can be specified by, for example, the size of the buffer reserved for the wireless communication terminal 40.

The information acquisition unit 104 may acquire information indicating the communication use of the wireless communication terminal 40. The information acquisition unit 104 acquires information indicating the purpose of communication of the wireless communication terminal 40, for example, according to the amount of data to be transmitted by the wireless communication terminal 40. As a specific example, the information acquisition unit 104 determines that the purpose of communication is the transmission of sensor data when the amount of data is less than a predetermined threshold value, and transmits voice data or image data when the amount of data exceeds the threshold value. Or, it is determined that the data is FOTA or the like.

The allocation unit 106 allocates communication resources to the wireless communication terminal 40. The allocation unit 106 allocates communication resources to the wireless communication terminal 40 according to, for example, eMTC. The eMTC may be an example of the first communication method. The allocation unit 106 allocates communication resources to the wireless communication terminal 40 according to, for example, NB-IoT. NB-IoT may be an example of a second communication method different from the first communication method. The second communication method is, for example, more restrictive than the first communication method.

The bandwidth setting unit 108 sets the bandwidth of the communication resource allocated by the allocation unit 106 to the wireless communication terminal 40. The allocation unit 106 may allocate communication resources to the wireless communication terminal 40 according to the bandwidth set by the bandwidth setting unit 108.

The bandwidth setting unit 108 sets, for example, the minimum bandwidth of the communication resource allocated to the wireless communication terminal 40 by the allocation unit 106. The bandwidth setting unit 108 may set the minimum bandwidth of the communication resource allocated to the wireless communication terminal 40 by the allocation unit 106 according to the communication use of the wireless communication terminal 40.

For example, when the allocation unit 106 allocates communication resources to the wireless communication terminal 40 according to the eMTC, the bandwidth setting unit 108 sets the minimum bandwidth from 15 when the communication use of the wireless communication terminal 40 is to transmit sensor data. The minimum bandwidth is set within the range of 180 kHz, and when the purpose of communication of the wireless communication terminal 40 is transmission of voice data or image data, the minimum bandwidth is set within the range of 180 to 1080 kHz.

The bandwidth setting unit 108 sets the minimum bandwidth to 15 kHz when the communication use of the wireless communication terminal 40 is to transmit sensor data and the amount of sensor data transmitted by the wireless communication terminal 40 is less than a predetermined threshold value. When the transmission amount is larger than the threshold value, the minimum bandwidth may be increased by 15 kHz as the transmission amount is larger.

When the purpose of communication of the wireless communication terminal 40 is to transmit voice data or image data, the bandwidth setting unit 108 determines that the amount of voice data or image data transmitted by the wireless communication terminal 40 is less than a predetermined threshold value. When the minimum bandwidth is 180 kHz and the transmission amount is larger than the threshold value, the minimum bandwidth may be increased by 180 kHz as the transmission amount is larger.

For example, when the allocation unit 106 allocates communication resources to the wireless communication terminal 40 according to the eMTC and NB-IoT, the bandwidth setting unit 108 determines the bandwidth using the eMTC and the bandwidth according to the communication use of the wireless communication terminal 40. Set the bandwidth to use NB-IoT.

When the communication use of the wireless communication terminal 40 is the transmission of sensor data, the bandwidth setting unit 108 further widens the bandwidth using the NB-IoT, and the communication use of the wireless communication terminal 40 is voice data or image data. In the case of transmission of, the bandwidth using eMTC may be increased. For example, when the communication use of the wireless communication terminal 40 is the transmission of sensor data, the bandwidth setting unit 108 is compared with the case where the communication use of the wireless communication terminal 40 is the transmission of voice data or image data. Widen the bandwidth using NB-IoT and narrow the bandwidth using eMTC. For example, when the communication use of the wireless communication terminal 40 is the transmission of voice data or image data, the bandwidth setting unit 108 is compared with the case where the communication use of the wireless communication terminal 40 is the transmission of sensor data. Widen the bandwidth using eMTC and narrow the bandwidth using NB-IoT.

In the above embodiment, the case where the control device 100 sets the bandwidth in the communication of the wireless communication terminal 40 via the satellite 200 has been described as an example, but the present invention is not limited to this, and the control device 300 may execute the setting. good. In this case, the control device 300 may have a configuration corresponding to the communication management unit 102, the information acquisition unit 104, the allocation unit 106, and the bandwidth setting unit 108.

FIG. 7 schematically shows an example of the hardware configuration of the computer 1200 functioning as the control device 100 or the control device 300. A program installed on the computer 1200 causes the computer 1200 to function as one or more "parts" of the device according to the present embodiment, or causes the computer 1200 to perform an operation associated with the device according to the present embodiment or the one or more. A plurality of "parts" can be executed and / or a computer 1200 can be made to execute a process according to the present embodiment or a stage of the process. Such a program may be executed by the CPU 1212 to cause the computer 1200 to perform certain operations associated with some or all of the blocks of the flowcharts and block diagrams described herein.

The computer 1200 according to this embodiment includes a CPU 1212, a RAM 1214, and a graphic controller 1216, which are connected to each other by a host controller 1210. The computer 1200 also includes input / output units such as a communication interface 1222, a storage device 1224, a DVD drive, and an IC card drive, which are connected to the host controller 1210 via the input / output controller 1220. The DVD drive may be a DVD-ROM drive, a DVD-RAM drive, or the like. The storage device 1224 may be a hard disk drive, a solid state drive, or the like. The computer 1200 also includes a legacy I / O unit such as a ROM 1230 and a keyboard, which are connected to the I / O controller 1220 via an I / O chip 1240.

The CPU 1212 operates according to the programs stored in the ROM 1230 and the RAM 1214, thereby controlling each unit. The graphic controller 1216 acquires the image data generated by the CPU 1212 in a frame buffer or the like provided in the RAM 1214 or itself so that the image data is displayed on the display device 1218.

Communication interface 1222 communicates with other electronic devices via a network. The storage device 1224 stores programs and data used by the CPU 1212 in the computer 1200. The DVD drive reads a program or data from a DVD-ROM or the like and provides it to the storage device 1224. The IC card drive reads the program and data from the IC card and / or writes the program and data to the IC card.

The ROM 1230 stores in it a boot program or the like executed by the computer 1200 at the time of activation and / or a program depending on the hardware of the computer 1200. The input / output chip 1240 may also connect various input / output units to the input / output controller 1220 via a USB port, a parallel port, a serial port, a keyboard port, a mouse port, and the like.

The program is provided by a computer-readable storage medium such as a DVD-ROM or IC card. The program is read from a computer-readable storage medium, installed in a storage device 1224, RAM 1214, or ROM 1230, which is also an example of a computer-readable storage medium, and executed by the CPU 1212. The information processing described in these programs is read by the computer 1200 and provides a link between the program and the various types of hardware resources described above. The device or method may be configured to implement the operation or processing of information in accordance with the use of the computer 1200.

For example, when communication is executed between the computer 1200 and an external device, the CPU 1212 executes a communication program loaded in the RAM 1214, and performs communication processing on the communication interface 1222 based on the processing described in the communication program. You may order. Under the control of the CPU 1212, the communication interface 1222 reads and reads the transmission data stored in the transmission buffer area provided in the recording medium such as the RAM 1214, the storage device 1224, the DVD-ROM, or the IC card. The data is transmitted to the network, or the received data received from the network is written to the reception buffer area or the like provided on the recording medium.

Further, the CPU 1212 makes the RAM 1214 read all or necessary parts of the file or the database stored in the external recording medium such as the storage device 1224, the DVD drive (DVD-ROM), the IC card, etc. Various types of processing may be performed on the data. The CPU 1212 may then write back the processed data to an external recording medium.

Various types of information such as various types of programs, data, tables, and databases may be stored in the storage medium and processed. The CPU 1212 describes various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, and information retrieval described in various parts of the present disclosure with respect to the data read from the RAM 1214. Various types of processing may be performed, including / replacement, etc., and the results are written back to the RAM 1214. Further, the CPU 1212 may search for information in a file, a database, or the like in the recording medium. For example, when a plurality of entries each having an attribute value of the first attribute associated with the attribute value of the second attribute are stored in the recording medium, the CPU 1212 is the first of the plurality of entries. The attribute value of the attribute of is searched for the entry that matches the specified condition, the attribute value of the second attribute stored in the entry is read, and the first attribute that satisfies the predetermined condition is selected. You may get the attribute value of the associated second attribute.

The program or software module described above may be stored on a computer 1200 or in a computer-readable storage medium near the computer 1200. In addition, a recording medium such as a hard disk or RAM provided in a dedicated communication network or a server system connected to the Internet can be used as a computer-readable storage medium, whereby the program can be transferred to the computer 1200 via the network. offer.

The blocks in the flowchart and block diagram of this embodiment may represent a stage of the process in which the operation is performed or a "part" of the device responsible for performing the operation. Specific stages and "parts" are supplied with dedicated circuits, programmable circuits supplied with computer-readable instructions stored on computer-readable storage media, and / or computer-readable instructions stored on computer-readable storage media. It may be implemented by the processor. Dedicated circuits may include digital and / or analog hardware circuits, and may include integrated circuits (ICs) and / or discrete circuits. Programmable circuits include logical products, logical sums, exclusive logical sums, negative logical products, negative logical sums, and other logical operations, such as, for example, field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), and the like. , Flipflops, registers, and reconfigurable hardware circuits, including memory elements.

The computer-readable storage medium may include any tangible device capable of storing instructions executed by the appropriate device, so that the computer-readable storage medium having the instructions stored therein is in a flow chart or block diagram. It will be equipped with a product that contains instructions that can be executed to create means for performing the specified operation. Examples of the computer-readable storage medium may include an electronic storage medium, a magnetic storage medium, an optical storage medium, an electromagnetic storage medium, a semiconductor storage medium, and the like. More specific examples of computer-readable storage media include floppy (registered trademark) disks, diskettes, hard disks, random access memory (RAM), read-only memory (ROM), and erasable programmable read-only memory (EPROM or flash memory). , Electrically Erasable Programmable Read Only Memory (EEPROM), Static Random Access Memory (SRAM), Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD), Blu-ray® Disc, Memory Stick , Integrated circuit cards and the like may be included.

Computer-readable instructions include assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or Smalltalk®, JAVA®, C ++, etc. Object-oriented programming languages, and either source code or object code written in any combination of one or more programming languages, including traditional procedural programming languages such as the "C" programming language or similar programming languages. May include.

Computer-readable instructions are used to generate means for a general-purpose computer, a special-purpose computer, or the processor of another programmable data processing device, or a programmable circuit, to perform an operation specified in a flowchart or block diagram. General purpose computers, special purpose computers, or other programmable data processing locally or via a wide area network (WAN) such as the local area network (LAN), the Internet, etc., to execute the computer-readable instructions. It may be provided in the processor of the device or in a programmable circuit. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers and the like.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

The order of execution of each process such as operation, procedure, step, and step in the apparatus, system, program, and method shown in the claims, specification, and drawings is particularly "before" and "prior to". It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

10 systems, 20 networks, 30 gateways, 40 wireless communication terminals, 100 controllers, 102 communication management units, 104 information acquisition units, 106 allocation units, 108 bandwidth setting units, 200 satellites, 300 controllers, 410 bandwidth, 412 Uplink allocation, 414 downlink allocation, 420 bandwidth, 422 uplink allocation, 424 downlink allocation, 510 data transmission bandwidth, 520 data transmission bandwidth, 600 LTE channel processing, 1200 computers, 1210 host controller, 1212 CPU, 1214 RAM, 1216 graphic controller, 1218 display device, 1220 I / O controller, 1222 communication interface, 1224 storage device, 1230 ROM, 1240 I / O chip

Claims (3)

A control device that controls communication by satellites that provide wireless communication services to terrestrial wireless communication terminals.
An allocation unit that allocates communication resources to the wireless communication terminal according to eMTC and NB-IoT, and
It is provided with a bandwidth setting unit that sets the minimum bandwidth of the communication resource allocated to the wireless communication terminal by the allocation unit according to the communication use of the wireless communication terminal .
The bandwidth setting unit sets the minimum bandwidth to 15 when the allocation unit allocates the communication resource to the wireless communication terminal according to the eMTC and the communication use of the wireless communication terminal is to transmit sensor data. In the range of 180 to 180 kHz, and when the purpose of communication of the wireless communication terminal is transmission of voice data or image data, the minimum bandwidth is set in the range of 180 to 1080 kHz.
The bandwidth setting unit is a case where the allocation unit allocates the communication resource to the wireless communication terminal according to the eMTC, and the communication of the wireless communication terminal is used for transmission of sensor data. When the amount of sensor data transmitted by the terminal is less than a predetermined threshold, the minimum bandwidth is set to 15 kHz, and when the amount of transmission is larger than the threshold, the larger the amount of transmission, the more the minimum bandwidth is set to 15 kHz. When the amount of the voice data or the image data transmitted by the wireless communication terminal is less than a predetermined threshold value in the case where the communication of the wireless communication terminal is used for the transmission of voice data or image data, the said When the minimum bandwidth is 180 kHz and the transmission amount is larger than the threshold value, the larger the transmission amount, the more the minimum bandwidth is increased by 180 kHz width.
When the communication use of the wireless communication terminal is the transmission of sensor data, the bandwidth setting unit widens the bandwidth using the NB-IoT, and the communication use of the wireless communication terminal is voice data or an image. In the case of data transmission, the bandwidth using the eMTC is increased.
Control device. A program for causing a computer to function as the control device according to claim 1. A control method executed by a control device that controls communication by satellites that provide wireless communication services to terrestrial wireless communication terminals.
It is a setting step of setting the minimum bandwidth of the communication resource allocated to the wireless communication terminal according to the eMTC and NB-IoT according to the communication use of the wireless communication terminal, and the communication resource is set to the wireless communication terminal according to the eMTC. When the communication use of the wireless communication terminal is to transmit sensor data, the minimum bandwidth is set within the range of 15 to 180 kHz, and the communication use of the wireless communication terminal is voice data or image data. In the case of transmission, the setting step of setting the minimum bandwidth within the range of 180 to 1080 kHz, and
It includes an allocation stage for allocating communication resources to the wireless communication terminal with the minimum bandwidth set in the setting stage.
The setting step is a case where the communication resource is allocated to the wireless communication terminal according to the eMTC, and when the communication of the wireless communication terminal is used for transmission of sensor data, the wireless communication terminal transmits the sensor data. When the amount is less than a predetermined threshold, the minimum bandwidth is set to 15 kHz, and when the transmission amount is larger than the threshold, the larger the transmission amount, the more the minimum bandwidth is increased by 15 kHz, and the wireless communication. When the purpose of communication of the terminal is transmission of voice data or image data, and the transmission amount of the voice data or image data by the wireless communication terminal is less than a predetermined threshold value, the minimum bandwidth is set to 180 kHz. When the transmission amount is larger than the threshold value, the larger the transmission amount, the more the minimum bandwidth is increased by 180 kHz.
In the setting stage, when the communication use of the wireless communication terminal is the transmission of sensor data, the bandwidth using the NB-IoT is widened, and the communication use of the wireless communication terminal is voice data or image data. In the case of transmission, the bandwidth using the eMTC is increased.
Control method.

Images