JPWO2019039096A1 - Information processing device, base station, terminal device, and information processing method - Google Patents

Abstract

To more efficiently operate a system including wireless communication. An acquisition unit that acquires, from each of the plurality of base stations, predetermined control information related to frame information transmitted from a terminal device to each of the plurality of base stations via wireless communication, and the plurality of base stations. An information processing apparatus, comprising: a processing unit that specifies the base station that acquires a payload included in the frame information based on the control information acquired from each of them.

Description

The present disclosure relates to an information processing device, a base station, a terminal device, and an information processing method.

In recent years, research and development related to IoT (Internet of Things) has been actively conducted. In IoT, wireless communication has become an important technical theme because various objects are connected to a network to exchange information. Therefore, for example, communication for IoT such as MTC (Machine Type Communication) and NB-IoT (Narrow Band IoT) has been standardized. In particular, with respect to IoT, due to the above-mentioned characteristics, the application destinations tend to be diversified without being limited to the conventional fields such as the application to the fields of agriculture and fisheries. The terminal device to be used is not limited to the conventional device such as a smartphone. As a specific example, a so-called low-cost terminal that can be introduced at a low cost can be applied by simplifying the configuration as compared with the conventional terminal device.

Further, as a technique for realizing the above-mentioned IoT, application of LPWA (Low Power Wide Area) is under study. LPWA is a wireless communication technique (communication method) that enables communication (in other words, long-distance communication) over a wide area with low power consumption.

JP, 2005-8532, A

By the way, in the so-called wireless communication as described above, the communication resources that can be used as the entire system and the power that can be used by each terminal device tend to be limited, and more efficient system operation is realized. Technology for For example, Patent Document 1 discloses an example of a technique for efficiently using the power available to a terminal device in a wireless communication system based on a standard such as LTE.

Particularly, due to the IoT-related technology, the application field of the wireless communication system is more diversified as compared with the conventional wireless system as described above, and the number of terminal devices is also increased with the diversification of the application field. There is a tendency. Under such circumstances, there is a demand for a mechanism that enables more efficient operation of the entire system including wireless communication.

Therefore, the present disclosure proposes a technique capable of more efficiently operating a system including wireless communication.

According to the present disclosure, predetermined control information related to frame information transmitted from a terminal device to each of a plurality of base stations via wireless communication, an acquisition unit that acquires from each of the plurality of base stations, and the plurality of the plurality of base stations. An information processing apparatus including: a processing unit that specifies the base station that acquires a payload included in the frame information based on the control information acquired from each base station.

Further, according to the present disclosure, an acquisition unit that acquires frame information from a terminal device via wireless communication and predetermined control information related to the acquired frame information are controlled to be transmitted to a predetermined server. And a control unit for controlling the control unit so that the payload included in the frame information is transmitted to the server in response to a request from the server.

Further, according to the present disclosure, a control unit that controls the frame information to be repeatedly transmitted to one or more base stations via wireless communication, and an acquisition unit that acquires information about a battery state, The control unit may provide the frame to the one or more base stations within a predetermined period according to the state of the battery and the number of the base stations capable of transmitting the frame information via the wireless communication. A terminal is provided that controls the number of times information is transmitted.

Further, according to the present disclosure, an acquisition unit that acquires frame information repeatedly transmitted from a terminal device to one or more base stations via at least one of the one or more base stations. And a processing unit that demodulates data from the frame information acquired from at least some of the base stations, and the number of the frames corresponds to the number of times the frame information is transmitted from the terminal device within a predetermined period. An information processing device is provided from which the frame information is acquired from the base station.

Further, according to the present disclosure, a computer may acquire predetermined control information related to frame information transmitted from a terminal device to each of a plurality of base stations via wireless communication, from each of the plurality of base stations. Specifying the base station that acquires the payload included in the frame information based on the control information acquired from each of the plurality of base stations.

Further, according to the present disclosure, a computer acquires frame information from a terminal device via wireless communication, and predetermined control information related to the acquired frame information is transmitted to a predetermined server. And controlling so that the payload included in the frame information is transmitted to the server in response to a request from the server.

Further, according to the present disclosure, the computer controls the frame information to be repeatedly transmitted to one or more base stations via wireless communication, obtains information about a battery state, and Depending on the state and the number of the base stations capable of transmitting the frame information via the wireless communication, the number of times the frame information is transmitted to one or more base stations within a predetermined period is determined. An information processing method including: controlling is provided.

According to the present disclosure, a computer acquires frame information repeatedly transmitted from a terminal device to one or more base stations via wireless communication from at least a part of the one or more base stations. And demodulating data from the frame information acquired from at least some of the base stations, the number of times corresponding to the number of times the frame information is transmitted from the terminal device within a predetermined period. An information processing method is provided in which the frame information is acquired from the base station.

As described above, according to the present disclosure, there is provided a technology capable of more efficiently operating a system including wireless communication.

Note that the above effects are not necessarily limited, and in addition to or in place of the above effects, any of the effects shown in this specification, or other effects that can be grasped from this specification. May be played.

FIG. 3 is an explanatory diagram for describing an example of a system configuration of a communication system according to an embodiment of the present disclosure. It is a block diagram showing an example of functional composition of a server in a communication system concerning the embodiment. FIG. 3 is a block diagram showing an example of a functional configuration of a base station in the communication system according to the same embodiment. It is a block diagram showing an example of functional composition of a terminal unit in a communication system concerning the embodiment. FIG. 1 is an explanatory diagram illustrating an example of a system configuration of a communication system according to a first embodiment of the present disclosure. FIG. 3 is an explanatory diagram for explaining an example of a schematic frame configuration of frame information in the communication system according to the same embodiment. It is a sequence diagram showing an example of a series of processing flows of the communication system according to the embodiment. It is a flow chart for explaining an example of a flow of a series of processings of a server concerning the embodiment. 6 is a flowchart for explaining an example of a flow of a series of processes of the base station according to the same embodiment. FIG. 11 is a sequence diagram showing another example of the flow of a series of processes of the communication system according to the same embodiment. 6 is a flowchart for explaining another example of the flow of a series of processes of the base station according to the same embodiment. 6 is a flowchart for explaining another example of the flow of a series of processes of the base station according to the same embodiment. FIG. 11 is an explanatory diagram for describing an example of a system configuration of a communication system according to a second embodiment of the present disclosure. FIG. 3 is an explanatory diagram illustrating an example of a frame configuration of a frame in the communication system according to the same embodiment. FIG. 8 is a sequence diagram showing an example of a flow of a series of processes of the communication system according to the same embodiment. It is a flow chart for explaining an example of a flow of a series of processings of a terminal unit concerning the embodiment. It is a flow chart for explaining another example of a series of processing flows of a server concerning the embodiment. FIG. 1 is a functional block diagram showing a configuration example of a hardware configuration of an information processing device that constitutes a communication system according to an embodiment of the present disclosure.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In this specification and the drawings, constituent elements having substantially the same functional configuration are designated by the same reference numerals, and a duplicate description will be omitted.

The description will be given in the following order.
1. Schematic configuration 1.1. System configuration 1.2. Configuration of server 1.3. Configuration of base station 1.4. Configuration of terminal device 2. 1. First embodiment 2.1. Technical issues 2.2. Technical features 2.2.1. System configuration 2.2.2. Frame configuration 2.2.3. Process 2.3. Evaluation 3. Second embodiment 3.1. Technical problem 3.2. Technical features 3.2.1. System configuration 3.2.2. Frame configuration 3.2.3. Processing 3.3. Evaluation 4. Hardware configuration 5. Conclusion

<<1. Schematic configuration>>
The schematic configuration of the communication system according to the present embodiment will be described below.

<1.1. System configuration>
First, with reference to FIG. 1, an example of a system configuration of a communication system according to an embodiment of the present disclosure will be described. FIG. 1 is an explanatory diagram for describing an example of a system configuration of a communication system according to an embodiment of the present disclosure.

As illustrated in FIG. 1, the communication system 1 according to an embodiment of the present disclosure includes a server 100, a plurality of wireless communication devices 200, a terminal device 300, and a client 400. In the communication system 1 according to the present embodiment, information is transmitted and received between the wireless communication device 200 and the terminal device 300 via a wireless communication path. For communication between the wireless communication device 200 and the terminal device 300, a technology such as a sub gigahertz (for example, 900 Hz band) LPWA (Low Power Wide Area) having a wider communication range may be applied.

The wireless communication device 200 is a device that provides a wireless communication service to a device under its control. For example, the wireless communication device 200A is a base station of a cellular system (or mobile communication system). The base station 200A performs wireless communication with a device (for example, the terminal device 300) located inside the cell N11A of the base station 200A. For example, the base station 200A may transmit a downlink signal to the terminal device 300 and may receive an uplink signal from the terminal device 300. Similarly, the wireless communication device 200B is a base station of a cellular system (or mobile communication system). That is, the base station 200B performs wireless communication with a device (for example, the terminal device 300) located inside the cell N11B of the base station 200B. Since the base stations 200A and 200B have the same configuration, the following description focuses on the base station 200A, and the detailed description of the base station 200B may be omitted. Further, in the following description, the wireless communication device 200 is also referred to as “base station 200”. Further, when simply described as “base station 200”, it may include base stations 200A and 200B and a base station 200C described later. Further, when the cells managed by each base station 200 are not particularly distinguished, they may be simply referred to as “cell N11”.

The base station 200 may be logically connected to another base station through a predetermined communication interface (for example, an X2 interface), and in this case, it is possible to transmit/receive control information and the like to/from the other base station. It may be. The base station 200 is also connected to the server 100 via a predetermined network (for example, a higher speed communication line). Based on such a configuration, for example, the base station 200 may acquire various kinds of information from the terminal device 300 via wireless communication, and transmit at least a part of the acquired information to the server 100. ..

The terminal device 300 is configured as, for example, a so-called low-cost terminal in which various configurations and functions (for example, configurations and functions related to wireless communication) that are applicable to IoT are limited as compared with a terminal device such as a smartphone. Good. The terminal device 300 may have a detection unit such as various sensors, and transmits information indicating various states and various states according to the detection result of the detection unit to the base station 200 via wireless communication. Good. As a specific example, the terminal device 300 can be applied to fields such as fisheries and agriculture by being used in combination with a detection unit such as various sensors. Thus, the terminal device 300 can be used for various purposes.

Moreover, the terminal device 300 may be configured to be movable. In this case, for example, the terminal device 300 acquires position information indicating its own position based on a so-called GNSS (Global Navigation Satellite System) technology such as GPS (Global Positioning System) and the like, and wirelessly communicates the acquired position information. The position information may be transmitted to the base station 200. In this case, the terminal device 300 may acquire its own position information, for example, by satellite positioning based on a radio signal transmitted from the GPS satellite 500. When the terminal device 300 is configured as a device that does not move (that is, a device that is fixedly installed), such as an electric power meter or a gas meter, for example, it relates to the acquisition of the position information described above. It may not have any function.

In addition, when the terminal device 300 is configured to be movable, a situation can be assumed in which the terminal device 300 operates based on power supply from a battery. Therefore, the terminal device 300 acquires information about the state of the battery (for example, the remaining amount of battery power), and controls communication with the base station 200 via wireless communication according to the information. Good.

As described above, the terminal device 300 may communicate with the base station 200 based on the LPWA technology. Therefore, the terminal device 300 does not necessarily have to be always connected to the base station 200, and may be connected to the base station 200 at predetermined intervals, for example. In particular, in a situation where a low-cost terminal that is configured to be movable is applied as the terminal device 300, for example, battery driving for a long period of several years or more can be assumed, so that constant connection or high-speed communication such as a smartphone is performed. May not be required.

In addition, the terminal device 300 repeatedly transmits information to be transmitted to the base station 200 a plurality of times (in other words, intermittent transmission), such as DRX (Discontinuous Reception)/DTX (Discontinuous Transmission) defined by 3GPP. You can send). In this case, the base station 200 superimposes the radio signal repeatedly transmitted from the terminal device 300, and performs demodulation processing on the radio signal whose signal level has increased due to the superimposition, thereby causing the terminal device 300 to The transmitted data may be decrypted. By such control, even when the signal level of the radio signal that can be transmitted by the terminal device 300 is limited, such as when the terminal device 300 is configured as a low-cost terminal, the base station 200 can , It becomes possible to demodulate the radio signal.

The configuration of the terminal device 300 described above is merely an example, and the configuration of the terminal device 300 is not necessarily limited. As a specific example, the terminal device 300 may be configured as a terminal device such as a smartphone (for example, a UE in LTE or LTE-A).

The server 100 is connected to the client 400 via a predetermined network N21. The type of the network N21 is not particularly limited. As a specific example, the network N21 may be configured by a so-called wireless network such as a network based on the Wi-Fi (registered trademark) standard. In addition, as another example, the network N21 may be configured by the Internet, a dedicated line, a LAN (Local Area Network), a WAN (Wide Area Network), or the like. The network N21 may include a plurality of networks, and at least a part of the network N21 may be configured as a wired network. Further, as described above, the server 100 is connected to each base station 200 via a predetermined network. With the configuration as described above, at least a part of the base stations 200 can be connected to the application or the like executed by the client 400 via the server 100.

Note that the client 400 schematically shows the main body that executes various applications, and the configuration thereof is not particularly limited. As a specific example, the client 400 may be configured as an information processing device such as a PC connected to the network N21. Further, the client 400 may be configured as a wireless communication terminal such as a smartphone that can access the server 100 via a wireless network. In this case, the client 400 may be a terminal device located in the cell N11 of the base station 200, and the network N21 includes a wireless communication path between the base station 200 and the client 400. You may

The server 100 also communicates with a server 600 (hereinafter, also referred to as “roaming server 600”) managed by another business operator via a predetermined network N31 (eg WAN, Internet, etc.). May be. With such a configuration, the server 100 can also transmit/receive information to/from the base station 200C managed by the other business operator via the roaming server 600. That is, the server 100 acquires information according to communication between the base station 200C and the terminal device 300 located inside the cell N11C of the base station 200C from the base station 200C via the roaming server 600. It is also possible to do.

Further, in the communication system 1 according to the present embodiment, the base station 200 and the terminal device 300 transmit information transmitted as a radio signal from a satellite such as the GPS satellite 500 between the base station 200 and the terminal device 300. It may be used for communication. As a specific example, the base station 200 and the terminal device 300 may perform communication synchronization based on time information (clock data) transmitted from the GPS satellite 500. With such a configuration, communication can be accurately synchronized between the base station 200 and the terminal device 300, and the signal strength transmitted and received between the base station 200 and the terminal device 300 can be further improved. This makes it possible to further improve the communication quality.

The example of the system configuration of the communication system according to the embodiment of the present disclosure has been described above with reference to FIG. 1.

<1.2. Server configuration>
Subsequently, an example of a functional configuration of the server 100 configuring the communication system 1 according to an embodiment of the present disclosure will be described. For example, FIG. 2 is a block diagram showing an example of the functional configuration of the server 100 in the communication system according to an embodiment of the present disclosure.

As shown in FIG. 2, the server 100 includes a network communication unit 110, a storage unit 130, and a processing unit 150.

The network communication unit 110 transmits/receives information to/from other devices. For example, the network communication unit 110 transmits information to the base station 200 and receives information from the base station 200. Further, the network communication unit 110 may send and receive information to and from the client 400 via a predetermined network (for example, the network N21 shown in FIG. 1). Further, the network communication unit 110 may access the roaming server 600 via a predetermined network (for example, the network N31 shown in FIG. 1). As a result, the network communication unit 110 can transmit and receive information to and from the base station 200 managed by another operator via the roaming server 600, for example.

The storage unit 130 temporarily or permanently stores a program and various data for the operation of the server 100. In the storage unit 130, for example, various information (for example, frame information) transmitted from the terminal device 300 to the base station 200 and acquired by the server 100 from the base station 200, registration information of the terminal device 300, and each base station 200. Location information, access information to the roaming server 600, and the like can be stored.

The processing unit 150 provides various functions of the server 100. The processing unit 150 includes a communication control unit 151, an information acquisition unit 153, a determination unit 155, and a notification unit 157.

The communication control unit 151 performs communication processing with other devices such as the base station 200, the client 400, and the roaming server 600. For example, the communication control unit 151 synthesizes information (for example, frame information) transmitted from the terminal device 300 to the plurality of base stations 200, and performs demodulation processing on the synthesized information, thereby causing the terminal device 300 to perform demodulation processing. The data transmitted to the base station 200 may be decoded.

The information acquisition unit 153 acquires various kinds of information from other devices as described above. For example, the information acquisition unit 153 may acquire, from the base station 200, at least part of the information (for example, frame information) notified from the terminal device 300 to the base station 200.

The determination unit 155 executes processing relating to various determinations. For example, the determination unit 155 determines that at least a part of the information (for example, the payload included in the frame information) transmitted from the terminal device 300 to each of the plurality of base stations 200 among the plurality of base stations 200. It may be determined from which of the above.

The notification unit 157 notifies other devices of various information. For example, the notification unit 157 may notify the client 400 of the information acquired from the base station 200.

It should be noted that the processing unit 150 may further include components other than the components described above. That is, the processing unit 150 can perform operations other than the operations of the above-described components.

The functional configuration of the server 100 shown in FIG. 2 is merely an example, and the configuration of the server 100 is not necessarily limited. For example, the server 100 may include components other than the components described above depending on the use and application field.

The example of the functional configuration of the server 100 configuring the communication system 1 according to an embodiment of the present disclosure has been described above with reference to FIG. 2.

<1.3. Base station configuration>
Next, an example of the functional configuration of the base station 200 configuring the communication system 1 according to an embodiment of the present disclosure will be described. For example, FIG. 3 is a block diagram showing an example of a functional configuration of the base station 200 in the communication system according to an embodiment of the present disclosure.

As shown in FIG. 3, the base station 200 includes an antenna unit 210, a wireless communication unit 220, a network communication unit 230, a storage unit 260, and a processing unit 270. The base station 200 may also include an antenna unit 240 and a satellite signal receiving unit 250.

The antenna unit 210 radiates the signal output from the wireless communication unit 220 into space as a radio wave. The antenna unit 210 also converts radio waves in the space into a signal and outputs the signal to the wireless communication unit 220.

The wireless communication unit 220 transmits and receives signals. For example, the wireless communication unit 220 may transmit a downlink signal to the terminal device 300 or may receive an uplink signal from the terminal device 300.

The network communication unit 230 sends and receives information. For example, the network communication unit 230 transmits information to other nodes and receives information from other nodes. For example, the other node may include another base station 200 and may include a core network node (for example, the server 100 described above).

The storage unit 260 temporarily or permanently stores a program and various data for the operation of the base station 200. The storage unit 260 stores, for example, various information (for example, frame information) transmitted from the terminal device 300, a reception time of the information, a signal strength of a received signal, information of a band used for wireless communication, and the like. obtain.

The antenna unit 240 converts a radio wave (that is, a radio signal) transmitted from a satellite such as the GPS satellite 500 into a signal and outputs the signal to the satellite signal receiving unit 250.

The satellite signal receiving section 250 receives a signal transmitted from the GPS satellite 500. The signal thus received is used, for example, for synchronization of communication with the terminal device 300 described above.

The processing unit 270 provides various functions of the base station 200. The processing unit 270 includes a communication control unit 271, an information acquisition unit 273, and a notification unit 275.

The communication control unit 271 performs communication processing via wireless communication with the terminal device 300. At this time, the communication control unit 271 may decode the information transmitted from the GPS satellite 500 according to the reception result of the signal from the GPS satellite 500 by the satellite signal receiving unit 250. Accordingly, the communication control unit 271 can also use the combined information (for example, time information) for communication synchronization with the terminal device 300, for example.

The information acquisition unit 273 acquires various kinds of information. For example, the information acquisition unit 273 may acquire desired information (for example, frame information) from the terminal device 300 based on communication with the terminal device 300.

The notification unit 275 notifies various information to other devices such as the server 100 and the terminal device 300. For example, the notification unit 275 may notify the server 100 of at least part of the information (for example, frame information) acquired from the terminal device 300.

It should be noted that the processing unit 270 may further include components other than the components described above. That is, the processing unit 270 can also perform operations other than the operations of the above-described components.

The functional configuration of the base station 200 shown in FIG. 3 is merely an example, and the configuration of the base station 200 is not necessarily limited. For example, the base station 200 may include components other than the components described above depending on the use and application field.

The example of the functional configuration of the base station 200 included in the communication system 1 according to an embodiment of the present disclosure has been described above with reference to FIG. 3.

<1.4. Configuration of terminal device>
Subsequently, an example of a functional configuration of the terminal device 300 configuring the communication system 1 according to an embodiment of the present disclosure will be described. For example, FIG. 4 is a block diagram showing an example of a functional configuration of the terminal device 300 in the communication system according to the embodiment of the present disclosure.

As shown in FIG. 3, the terminal device 300 includes an antenna unit 310, a wireless communication unit 320, a storage unit 360, and a processing unit 370. Further, the terminal device 300 may include an antenna unit 340 and a satellite signal receiving unit 350.

The antenna unit 310 radiates the signal output from the wireless communication unit 320 into space as a radio wave. The antenna unit 310 also converts radio waves in the space into signals and outputs the signals to the wireless communication unit 320.

The wireless communication unit 320 sends and receives signals. For example, the wireless communication unit 320 may transmit the uplink signal to the base station. The wireless communication unit 320 may also receive a downlink signal from the base station. When the terminal device 300 is configured as a low-cost terminal, the wireless communication unit 320 may be configured to be able to execute only one of the transmission process and the reception process.

The storage unit 360 temporarily or permanently stores a program and various data for the operation of the terminal device 300. The storage unit 360 may store, for example, identification information of the node (terminal device 300), various information acquired by the processing unit 270 (for example, position information of the terminal device 300), and the like.

The antenna unit 340 converts a radio wave (that is, a radio signal) transmitted from a satellite such as the GPS satellite 500 into a signal and outputs the signal to the satellite signal receiving unit 350.

The satellite signal receiving unit 350 receives a signal transmitted from the GPS satellite 500. The signal thus received is used, for example, for synchronization of communication with the base station 200 described above, acquisition of position information of the terminal device 300 (in other words, estimation of the position of the terminal device 300), and the like. It

The processing unit 370 provides various functions of the terminal device 300. The processing unit 370 includes a communication control unit 371, an information acquisition unit 373, a determination unit 375, and a notification unit 377.

The communication control unit 371 performs communication processing with the base station 200 via wireless communication. At this time, the communication control unit 371 may decode the information transmitted from the GPS satellite 500 according to the reception result of the signal from the GPS satellite 500 by the satellite signal receiving unit 350. Accordingly, the communication control unit 371 can also use the combined information (for example, time information) for synchronization of communication with the base station 200, for example. Further, the communication control unit 371 may control the communication processing via wireless communication with the base station 200, according to the determination result by the determination unit 375 described later.

The information acquisition unit 373 acquires various information. For example, the information acquisition unit 373 may acquire the position information of the terminal device 300 according to the decoding result of the information transmitted from the GPS satellite 500. Further, the information acquisition unit 373 may acquire various information according to the detection result from a detection unit (not shown) such as a proximity sensor, a temperature sensor, an acceleration sensor, a gyro sensor. In this way, the information acquired from the detection unit as described above is used to estimate information about various states and situations such as the state of the environment around the terminal device 300 and the state of the terminal device 300 itself. It becomes possible to acquire.

The determination unit 375 executes processing relating to various determinations. For example, the determination unit 375 may estimate various states and various situations based on the information acquired by the information acquisition unit 373, and may make a determination regarding communication with the base station 200 according to the estimation result. As a more specific example, the determination unit 375 may make a determination regarding repeated transmission (that is, intermittent transmission) to the base station 200, according to the remaining power level of its own battery. Accordingly, for example, the communication control unit 371 described above can also reduce power consumption by reducing the number of repeated transmissions when the remaining amount of battery power is less than the threshold value.

The notification unit 377 notifies other devices such as the base station 200 of various types of information. For example, the notification unit 377 may notify the base station 200 of various information acquired by the information acquisition unit 373 (for example, position information of the terminal device 300).

It should be noted that the processing unit 370 may further include components other than the components described above. That is, the processing unit 370 can also perform operations other than the operations of the above-described components.

Further, the functional configuration of the terminal device 300 shown in FIG. 4 is merely an example, and the configuration of the terminal device 300 is not necessarily limited. For example, the terminal device 300 may include components other than the components described above depending on the application and the field of application. As a specific example, the terminal device 300 includes a near field communication module such as Bluetooth (registered trademark) or Wi-Fi (registered trademark), a near field communication module such as NFC (Near Field Communication), and the various sensors described above. Etc. may be included.

The example of the functional configuration of the terminal device 300 configuring the communication system 1 according to an embodiment of the present disclosure has been described above with reference to FIG. 4.

<<2. First embodiment>>
Subsequently, the first embodiment of the present disclosure will be described.

<2.1. Technical issues>
First, technical problems of the communication system according to the first embodiment will be described.

As described above, in the communication system 1 according to the embodiment of the present disclosure, the terminal device 300 may be configured to be movable. In this case, the terminal device 300 can also acquire its own position information by satellite positioning based on a radio signal transmitted from the GPS satellite 500, for example. On the other hand, when the terminal device 300 is located indoors or underground, it may be difficult for the terminal device 300 to acquire its own position information by the satellite positioning.

Under such circumstances, various technologies have been studied that enable the position information of the terminal device 300 to be acquired even when it is difficult to acquire the position information by the satellite positioning. As a specific example, Japanese Patent Laid-Open No. 2016-184861 discloses information (eg, frame shift, reception timing, etc.) according to the communication result between each of the three base stations and the terminal device (wireless communication terminal). ) Is used to perform positioning based on the positional relationship between the three base stations and the terminal device (that is, to estimate the position of the wireless communication terminal). On the other hand, in a situation where the terminal device moves, the state related to the movement of the terminal device is grasped only by the frame shift and the reception timing in the communication between each of the three base stations and the terminal device. Can be difficult.

On the other hand, each of the plurality of base stations transmits the frame information acquired from the terminal device to the server, and the server side analyzes the frame information to determine the position of the terminal device or the terminal device. There is also a method of estimating a state related to movement. However, with this method, the traffic related to data communication between each of the plurality of base stations and the server tends to increase, and the load on the communication line may increase.

Further, the increase in traffic as described above is not limited to the case of estimating the position of the terminal device. That is, in a situation in which information according to communication between each of the plurality of base stations and the terminal device is transmitted to the server from each of the plurality of base stations, similarly, Traffic related to data communication between each and the server may increase.

In view of such a situation, in the present embodiment, in response to communication between the terminal device and the base station, an increase in traffic is suppressed under the situation where communication is performed between the base station and the server. Then, we propose a technology that can improve the operational efficiency of the entire system.

<2.2. Technical features>
The technical features of the communication system according to the present embodiment will be described below.

<2.2.1. System configuration>
First, an example of the system configuration of the communication system according to the present embodiment will be described. For example, FIG. 5 is an explanatory diagram for describing an example of the system configuration of the communication system according to the present embodiment. Note that, hereinafter, for convenience, the communication system according to the present embodiment may be referred to as a "communication system 1A" when it is explicitly distinguished from the communication system 1 described with reference to FIG. Further, in the present description, the terminal device 300 estimates the position of the terminal device 300 in a situation where it is difficult to acquire its own position information by satellite positioning based on a radio signal transmitted from the GPS satellite 500. The case will be described. That is, the system configuration of the communication system 1A according to the present embodiment shown in FIG. 5 is different from the system configuration of the communication system 1 described with reference to FIG. 1 in that the GPS satellite 500 is not included. The configuration is the same. Therefore, in the present embodiment, description will be given focusing on a part different from the example described with reference to FIG. 1, and detailed description of parts substantially similar to the example described with reference to FIG. 1 will be omitted. ..

In the example illustrated in FIG. 5, the server 100 acquires information corresponding to the communication between each of the plurality of base stations 200 and the terminal device 300 from the base station 200, and analyzes the acquired information. The position of the terminal device 300 is estimated. For example, the server 100 may estimate the position of the terminal device 300 in response to a request from the client 400 via the network N21 and feed back the estimation result of the position to the client 400.

In addition, in the present embodiment, if the server 100 can estimate the position of the terminal device 300 based on information according to communication between each of the plurality of base stations 200 and the terminal device 300, The method is not particularly limited. For example, the server 100 is known based on a so-called three-point survey technique using a frame shift, a reception timing, and the like according to communication between the terminal device 300 and each of the three or more base stations 200. The position of the terminal device 300 may be estimated from the position of each base station 200.

The server 100 may also use the information to estimate the position of the terminal device 300 by acquiring information from the base station 200 managed by another operator via the roaming server 600. As a specific example, when the number of base stations 200 that can acquire information for estimating the position of the terminal device 300 is less than a threshold, the server 100 is managed by another operator via the roaming server 600. The information may be additionally acquired from the base station 200.

The example of the system configuration of the communication system according to the present embodiment has been described above with reference to FIG.

<2.2.2. Frame configuration>
Next, an example of a schematic frame configuration of data (that is, frame information) transmitted and received between each base station 200 and the terminal device 300 in the communication system according to the present embodiment will be described. For example, FIG. 6 is an explanatory diagram for describing an example of a schematic frame configuration of frame information in the communication system according to the present embodiment.

As shown in FIG. 6, the frame information in the communication system according to the present embodiment mainly includes control information including a preamble (Preamble) and a synchronization signal (Sync), a payload (Payload), and a CRC. As described above, the control information includes signals such as a preamble and a synchronization signal (Sync) for synchronizing between the base station 200 and the terminal device 300. Further, the payload includes identification information of the terminal device 300 and the main body of data transmitted from the terminal device 300 to the base station 200. The data may include, for example, information acquired by the terminal device 300 from various sensors. In addition, the data may be encrypted and coded bits necessary for error correction may be added to the frame information. CRC is a code for the purpose of error detection, and is used to determine whether or not the transmitted data has a bit error.

In the present embodiment, in the frame information as shown in FIG. 6, the information of the part not including the payload may be individually treated as “payload-less information”. For example, only the above control information (Preamble/Sync) can be used as the payload-less information.

As described above, with reference to FIG. 6, an example of a schematic frame configuration of data (that is, frame information) transmitted and received between each base station 200 and the terminal device 300 in the communication system according to the present embodiment will be described. did.

<2.2.3. Processing>
Subsequently, an example of a processing sequence of the communication system according to the present embodiment will be described. In the description, the server 100 acquires information from each base station 200 in response to a request from an application executed by the client 400 or the like and estimates the position of the terminal device 300 based on the information. An example will be described. Regarding the same processing, the case where the server 100 performs position estimation of the terminal device 300 before acquiring the payload included in the frame information transmitted from the terminal device 300 to the base station 200 and the case where the payload is acquired. The case where the position estimation of the said terminal device 300 is performed later can be assumed. Therefore, hereinafter, the process sequence is divided into “when the position estimation of the terminal device 300 is performed before the acquisition of the payload” and “when the position estimation of the terminal device 300 is performed after the acquisition of the payload”. An example will be described.

(1) When the position estimation of the terminal device 300 is performed before the acquisition of the payload First, before the server 100 acquires the payload included in the frame information transmitted from the terminal device 300 to the base station 200, the terminal device concerned An example of the flow of processing when the position estimation of 300 is performed will be described. For example, FIG. 7 is a sequence diagram showing an example of a series of processing flows of the communication system 1A according to the present embodiment.

First, in the client 400 or the like, an application is executed in response to a request from the user, and the application requests the server 100 via the predetermined network N21 to present the position information of the terminal device 300 (S101). .. The means and interface for making the request are not particularly limited. For example, the request may be issued from the client 400 to the server 100 in response to a user input via a web browser. The request may be issued from the application (that is, from the client 400) to the server 100 by executing the application installed on the smartphone, the tablet terminal, or the like.

When the server 100 receives a request related to the presentation of the positional information of the terminal device 300 from the application, the server 100 receives the request from the terminal device 300 based on the reception history of the information from the terminal device 300 and the registration information about the terminal device 300. The estimated time at which the information will be received is estimated (S103). Identification information is associated with each terminal device 300, and the identification information is shared between the server 100 and the application, so that the server 100 and the application can be designated from one side. It is assumed that the terminal device 300 that has been deleted can be recognized.

In addition, the terminal device 300 transmits frame information to the neighboring base stations 200 according to a predetermined condition (S105A, S105B, and S105C). As a specific example, the terminal device 300 transmits frame information to the neighboring base stations 200 every predetermined period. In this description, the terminal device 300 is assumed to transmit the frame information to each of the neighboring base stations 200A, 200B, and 200C. In addition, the base stations 200A and 200B are base stations managed by a company that manages the server 100, and are under the control of the server 100. On the other hand, the base station 200C is a base station managed by another company different from the company managing the base stations 200A and 200B, and is under the control of the roaming server 600.

Next, the server 100 makes a request for no payload information to the base stations 200A and 200B under its control (S107A and S107B). Receiving the request, each of the base stations 200A and 200B controls the part of the frame information received from the terminal device 300 that does not include a payload (for example, a control including a preamble and a sync signal). Information) is transmitted to the server 100 as payload-less information (S109A and S109B).

In addition, the server 100 (S111) when the number of base stations 200 from which information (information without payload) for estimating the position of the terminal device 300 is acquired is less than a threshold (for example, less than three). ), the request for no payload information is made to the roaming server 600 (S113). Upon receiving the request, the roaming server 600 makes a request for no payload information to the base station 200C under its control (S115). The base station 200C that has received the request transmits, to the roaming server 600, the information of the part that does not include the payload in the frame information received from the terminal device 300 as the payload-less information (S117). Then, the roaming server 600 transfers the payload-free information transmitted from the base station 200C to the server 100 (S119).

The server 100 estimates the position of the terminal device 300 based on the payload-less information transmitted from each base station 200 (that is, the base stations 200A to 200C) (S121). At this time, the server 100 includes various pieces of information included in the no-payload information acquired from each of the plurality of base stations 200, for example, information regarding a synchronization signal (Sync), reception time, and the like, and position information of each of the plurality of base stations 200. The position and movement state of the terminal device 300 may be estimated based on As a specific example, the server 100 is not limited to simply estimating the position of the terminal device 300 by analyzing the time expansion/contraction, the phase change, and the like of the synchronization signal included in the no-payload information. You may estimate a moving condition (for example, moving speed).

Next, the server 100 determines the base station 200 from which the payload included in the frame information transmitted from the terminal device 300 to each base station 200 is acquired, based on the payload-free information acquired from each of the plurality of base stations 200. .. As a specific example, the server 100 selects the base station 200 having the highest received signal strength related to the reception of the frame information from the terminal device 300 among the plurality of base stations 200 based on the information included in the acquired no-payload information. , May be determined as the base station 200 from which the payload is acquired. Then, the server 100 requests the base station 200, which is determined as the payload acquisition source, to transmit the payload (S123). Receiving the request, the base station 200 transmits, to the server 100, the portion corresponding to the payload in the frame information previously received from the terminal device 300 as the payload information (S125). The server 100 reconstructs the frame information based on the received payload information and the previously received no-payload information.

Next, the server 100 demodulates and decodes the reconstructed frame information, and compares the identification information of the terminal device 300 obtained as a result of the demodulation and decoding with the registration information managed by itself. Accordingly, the server 100 confirms that the terminal device 300 that is the transmission source of the frame information is the terminal device 300 that is the target of position estimation according to the request from the application (S127).

Then, when the server 100 confirms that the terminal device 300 that is the transmission source of the reconstructed frame information is the terminal device 300 that is the target of position estimation, the server 100 uses the previously estimated position information of the terminal device 300 as an application. To (S129).

Heretofore, an example of the flow of a series of processes of the communication system according to the present embodiment has been described with reference to FIG. 7.

Next, with reference to FIG. 8, an example of the flow of a series of processes of the server 100 in the example shown in FIG. 7 will be described. FIG. 8 is a flowchart for explaining an example of the flow of a series of processes of the server 100 according to this embodiment.

First, when the server 100 receives a request from the application regarding the presentation of the position information of the terminal device 300, the server device 300 receives the information from the terminal device 300 and the registration information about the terminal device 300. The estimated time at which the information from will be received is estimated (S201). Then, the server 100 waits until the estimated reception time has passed (S203, NO), and when the reception scheduled time has passed (S203, YES), there is no payload from the base station 200 under its control. Information is collected (S205).

If the number of base stations 200 for which no payload information is to be collected is less than the threshold value (S207), the server 100 accesses the roaming server 600 operated by another affiliated company (S209). As a result, the server 100 collects the payload-free information from the other base stations 200 managed by the roaming server 600 via the roaming server 600 (S205).

Then, when the server 100 collects the payload-free information from the number of base stations equal to or more than the threshold (S207, YES), the server 100 estimates the position of the terminal device 300 based on the collected payload-free information. At this time, the server 100 includes various pieces of information included in the no-payload information acquired from each of the plurality of base stations 200, for example, information regarding a synchronization signal (Sync), reception time, and the like, and position information of each of the plurality of base stations 200. The position and movement state of the terminal device 300 may be estimated based on Further, the server 100 determines the base station 200 from which the payload included in the frame information transmitted from the terminal device 300 to each base station 200 is acquired, based on the payload-less information. For example, the server 100 acquires the payload of the base station 200 having the highest received signal strength related to the reception of the frame information from the terminal device 300 among the plurality of base stations 200 based on the information included in the acquired no-payload information. It may be determined as the original base station 200 (S211). That is, in this case, the no-payload information or the above-mentioned information included in the no-payload information corresponds to an example of “predetermined control information” for specifying the base station 200 that acquires the payload.

The server 100 requests transmission of the payload from the base station 200 determined as the acquisition source of the payload, and acquires the payload information from the base station 200 as a response. The server 100 reconstructs the frame information based on the payload information received from the base station 200 and the payload-free information previously received. The server 100 demodulates and decodes the reconstructed frame information, and compares the identification information of the terminal device 300 obtained as a result of the demodulation and the decoding with the registration information managed by itself. Accordingly, the server 100 confirms that the terminal device 300 that is the transmission source of the frame information is the terminal device 300 that is the target of position estimation according to the request from the application (S213).

Then, when the server 100 confirms that the terminal device 300 that is the transmission source of the reconstructed frame information is the terminal device 300 that is the target of position estimation, the server 100 uses the previously estimated position information of the terminal device 300 as an application. Send to.

Heretofore, an example of the flow of a series of processes of the server 100 in the example shown in FIG. 7 has been described with reference to FIG. 8.

Next, with reference to FIG. 9, an example of a series of processing flow of the base station 200 in the example shown in FIG. 7 will be described. FIG. 9 is a flowchart for explaining an example of a flow of a series of processes of the base station 200 according to this embodiment.

Upon receiving the frame information from the communication terminal 300, the base station 200 starts the process shown in FIG. That is, the base station 200 first receives frame information from the communication terminal 300 (S251).

Next, the base station 200 determines whether there is a request for no payload information from the server 100 (S253). For the request for no payload information, the reception time of the frame information from which the information is acquired or the band information may be used. When the base station 200 receives a request for no payload information from the server 100 (S253, YES), the base station 200 extracts the payload information from the frame information received from the terminal device 300 by extracting the payload information. The absence information is generated (S255). Further, the base station 200 transmits the generated no-payload information to the server 100 as a response to the request from the server 100 (S257).

When there is no payload no information request from the server 100 (S253, NO), the base station 200 does not execute the processes related to the generation of the payload no information and the transmission of the payload no information, and The process may be transited to.

Next, the base station 200 determines whether there is a request for payload information from the server 100 (S259). When the base station 200 receives the request for payload information from the server 100 (S259, YES), the base station 200 extracts the information of the portion corresponding to the payload from the frame information received from the terminal device 300 in the past. Information is generated (S261). The base station 200 also transmits the generated payload information to the server 100 as a response to the request from the server 100 (S263).

If there is no request for payload information from the server 100 (S259, NO), the base station 200 does not have to execute the processes related to generation of the payload information and transmission of the payload information.

Heretofore, an example of the flow of a series of processes of the base station 200 in the example shown in FIG. 7 has been described with reference to FIG. 9.

(2) When the position estimation of the terminal device 300 is performed after the acquisition of the payload Subsequently, after the server 100 acquires the payload included in the frame information transmitted from the terminal device 300 to the base station 200, the terminal device 300 concerned. An example of the flow of processing when position estimation is performed will be described. For example, FIG. 10 is a sequence diagram showing another example of the flow of a series of processes of the communication system 1A according to this embodiment.

First, in the client 400 or the like, an application is executed in response to a request from a user, and the application requests the server 100 via the predetermined network N21 to present the position information of the terminal device 300 (S301). .. In addition, when the server 100 receives a request from the application regarding the presentation of the position information of the terminal device 300, the terminal device 300 is based on the reception history of the information from the terminal device 300 and the registration information about the terminal device 300. The estimated time at which the information from will be received is estimated (S303). The processing indicated by reference numerals S301 and S303 is the same as the example described with reference to FIG. 7 (that is, the processing indicated by reference numerals S101 and S103), and thus detailed description thereof will be omitted.

In addition, the terminal device 300 transmits frame information to the neighboring base stations 200 according to a predetermined condition (S305A, S305B, and S305C). Note that the same processing is also the same as the example described with reference to FIG. 7 (that is, the processing indicated by reference signs SS101A, S105B, and S105C). In the present description, it is assumed that the base stations 200A and 200B are under the control of the server 100 and the base station 200C is under the control of the roaming server 600, as in the example shown in FIG.

Next, the server 100 requests the base stations 200A and 200B under its control to transmit reception information indicating various states and conditions related to reception of frame information from the terminal device 300 (S307A, S307B). .. Examples of the reception information include information such as signal strength of the reception signal, reception time, reception band, and the like. Receiving the request, each of the base stations 200A and 200B transmits the reception information to the server 100 according to the reception status of the frame information from the terminal device 300 (S309A, S309B).

If the number of base stations 200 from which the reception information is acquired is less than the threshold value (for example, less than 3 stations) (S311), the server 100 requests the roaming server 600 for the reception information. Perform (S313). The roaming server 600 that has received the request makes a request for reception information to the base station 200C under its control (S315). The base station 200C that has received the request transmits the reception information to the roaming server 600 according to the reception status of the frame information from the terminal device 300 (S317). Then, the roaming server 600 transfers the reception information transmitted from the base station 200C to the server 100 (S319).

When the number of base stations 200 that have received the reception information reaches a prescribed number, the server 100 becomes an acquisition source of the frame information transmitted from the terminal device 300 from among the plurality of base stations 200 that have acquired the reception information. The base station 200 is specified. As a specific example, the server 100 may specify, from the plurality of base stations 200, the base station 200 having a higher signal strength associated with reception of the frame information transmitted from the terminal device 300. That is, in this case, the reception information corresponds to an example of “predetermined control information” for specifying the base station 200 that acquires the payload. In this description, the server 100 is assumed to have specified the base station 200A.

The server 100 requests the identified base station 200A to transmit frame information (S321A). Receiving the request, the base station 200A transmits the frame information previously received from the terminal device 300 to the server 100 (S323A).

Further, the server 100 requests the base stations 200 other than the specified base station 200A (that is, the base stations 200B and 200C) to transmit the payload-free information. For example, the server 100 directly requests the base station 200B under its control to transmit the payload-less information (S321B). Receiving the request, the base station 200B transmits, to the server 100, the information of the portion not including the payload in the frame information received from the terminal device 300 before as the payload-less information (S323B). Further, the server 100 requests the base station 200C, which is not under its control, to transmit the payload-free information via the roaming server 600 (S325, S327). Receiving the request, the base station 200C transmits, to the server 100 via the roaming server 600, the information of the portion not including the payload among the frame information received from the terminal device 300 before as the payload-less information (S329). , S331).

The server 100 estimates the position of the terminal device 300 based on the received frame information and no payload information (S333). The method of estimating the position of the terminal device 300 is the same as the example described with reference to FIG. 7 (that is, the process indicated by reference numeral S121).

Next, the server 100 demodulates and decodes the received frame information, and compares the identification information of the terminal device 300 obtained as a result of the demodulation and decoding with the registration information managed by itself. Accordingly, the server 100 confirms that the terminal device 300 that is the transmission source of the frame information is the terminal device 300 that is the target of the position estimation according to the request from the application (S335).

Then, when the server 100 confirms that the terminal device 300 that is the transmission source of the reconstructed frame information is the terminal device 300 that is the target of position estimation, the server 100 uses the previously estimated position information of the terminal device 300 as an application. To (S337).

In the above, with reference to FIG. 10, another example of the flow of the series of processes of the communication system 1A according to the present embodiment has been described.

Next, with reference to FIG. 11, an example of the flow of a series of processes of the base station 200 in the example shown in FIG. 10 will be described. FIG. 11 is a flowchart for explaining another example of the flow of a series of processes of the base station 200 according to this embodiment.

First, when the server 100 receives a request from the application regarding the presentation of the position information of the terminal device 300, the server device 300 receives the information from the terminal device 300 and the registration information about the terminal device 300. The estimated time at which the information from will be received is estimated (S401). Then, the server 100 waits until the estimated reception time has passed (S403, NO), and when the reception scheduled time has passed (S403, YES), from the base station 200 under its control to the terminal device 300. Received information indicating various states and situations relating to the reception of the frame information of is collected (S405).

If the number of base stations 200 for which the reception information is to be collected is less than the threshold (S407), the server 100 accesses the roaming server 600 operated by another affiliated business operator (S409). Thereby, the server 100 collects the reception information from the other base stations 200 managed by the roaming server 600 (S405).

Then, when the server 100 collects the reception information from the number of base stations equal to or more than the threshold value (S407, YES), the server 100 transmits the reception information from the plurality of base stations 200 that acquired the reception information. The base station 200 from which the frame information is acquired is specified. For example, the server 100 may specify, from the plurality of base stations 200, the base station 200 having a higher signal strength for receiving the frame information transmitted from the terminal device 300. Then, the server 100 acquires, from the specified base station 200, the frame information transmitted from the terminal device 300 to the base station 200. In addition, the server 100 acquires the no-payload information based on the frame information from other base stations 200 other than the specified base station 200 (S411).

The server 100 estimates the position of the terminal device 300 based on the received frame information and no payload information. Also, the server 100 demodulates and decodes the received frame information, and compares the identification information of the terminal device 300 obtained as a result of the demodulation and decoding with the registration information managed by itself. Accordingly, the server 100 confirms that the terminal device 300 that is the transmission source of the frame information is the terminal device 300 that is the target of position estimation according to the request from the application (S413).

Then, when the server 100 confirms that the terminal device 300 that is the transmission source of the reconstructed frame information is the terminal device 300 that is the target of position estimation, the server 100 uses the previously estimated position information of the terminal device 300 as an application. Send to.

Heretofore, an example of the flow of a series of processes of the base station 200 in the example shown in FIG. 10 has been described with reference to FIG. 11.

Subsequently, with reference to FIG. 12, an example of a flow of a series of processes of the base station 200 in the example illustrated in FIG. 10 will be described. FIG. 12 is a flowchart for explaining another example of the flow of a series of processes of the base station 200 according to this embodiment.

Upon receiving the frame information from the terminal device 300, the base station 200 starts the process shown in FIG. That is, the base station 200 first receives frame information from the terminal device 300 (S451).

Next, when the server 100 requests the reception information, the base station 200 transmits, to the server 100, reception information indicating various states and conditions regarding reception of the frame information from the terminal device 300 (S453).

Next, the base station 200 determines whether there is a frame information request from the server 100 (S455). When the base station 200 receives the frame information request from the server 100 (S455, YES), the base station 200 transmits the frame information received from the terminal device 300 to the server 100 (S457).

When there is no request for frame information from the server 100 (S455, NO), the base station 200 does not execute the process related to the transmission of the frame information received from the terminal device 300, and shifts to the next process. You may.

Further, the base station 200 determines whether there is a request for no payload information from the server 100 (S459). When the base station 200 receives the request for no payload information from the server 100 (S459, YES), the payload is extracted by extracting the information of the portion not including the payload from the frame information received from the terminal device 300. The absence information is generated (S461). Further, the base station 200 transmits the generated no-payload information to the server 100 as a response to the request from the server 100 (S463).

Note that the base station 200 does not have to execute the processes related to the generation of the payload-less information and the transmission of the payload-free information when there is no request for the payload-free information from the server 100 (S459, NO). ..

Heretofore, an example of the flow of a series of processes of the base station 200 in the example shown in FIG. 10 has been described with reference to FIG. 11.

<2.3. Evaluation>
As described above, in the communication system according to the first embodiment of the present disclosure, the server transmits predetermined control information related to frame information transmitted from the terminal device to each of the plurality of base stations via wireless communication. , From each of the plurality of base stations. Examples of the control information include the frame-less information and the reception information described above. Then, the server specifies the base station that acquires the payload included in the frame information based on the control information acquired from each of the plurality of base stations.

As described above, according to the communication system according to the present embodiment, the server uses the frame information transmitted from the target terminal device to each base station only from some of the plurality of base stations. It is possible to receive the included payload. Therefore, according to the communication system according to the present embodiment, as compared with the case where the entire frame information (particularly, the payload included in the frame information) is transmitted from each of the plurality of base stations to the server, the server and each base station are It is possible to limit the traffic of communication between the two. That is, according to the communication system according to the present embodiment, it is possible to further improve the operational efficiency of the entire system.

<<3. Second embodiment>>
Subsequently, a second embodiment of the present disclosure will be described.

<3.1. Technical issues>
First, technical problems of the communication system according to the second embodiment will be described below.

As an example of a technique for further improving the power consumption of a low power consumption wireless communication terminal such as the aforementioned low-cost terminal, DRX/DTX (Discontinuous Reception/Discontinuous Transmission) standardized by 3GPP (Third Generation Partnership Project) is used. Another method is to control the reception waiting time and the transmission time. DRX/DTX is disclosed, for example, in US Patent Application Publication No. 2008/0186892.

On the other hand, when it is supposed to be applied to fields such as fisheries and agriculture, it may be difficult to frequently perform maintenance such as battery replacement, and commonly used communication terminals (for example, smartphones). Etc.), it may be required to maintain the drive by the power supply from the battery for a longer period.

In addition, unlike a communication terminal such as a smartphone, a low-cost terminal may perform only uplink transmission from a terminal device to a base station and may not have a function of receiving a downlink signal from the base station. is there. On the other hand, DRX/DTX as described above is premised on bidirectional communication between the terminal device and the base station. Therefore, as described above, when the terminal device capable of only uplink transmission to the base station is assumed, it may be difficult to apply the DRX/DTX technique.

In view of the above situation, the present embodiment proposes a technique capable of further improving the operational efficiency of the entire system by further reducing the power consumption of the terminal device.

<3.2. Technical features>
The technical features of the communication system according to the present embodiment will be described below.

<3.2.1. System configuration>
First, the outline of an example of the system configuration of the communication system according to the present embodiment will be described. For example, FIG. 13 is an explanatory diagram for describing an example of the system configuration of the communication system according to the present embodiment. Note that, hereinafter, for convenience, the communication system according to the present embodiment may be referred to as a “communication system 1B” when it is explicitly distinguished from the communication system 1 described with reference to FIG. Further, in FIG. 13, reference numerals 300A and 300B respectively correspond to the terminal device 300 shown in FIG. Further, in FIG. 13, the components denoted by the same reference numerals as those in FIG. 1 indicate the same components as the example shown in FIG. Therefore, in the present embodiment, description will be given focusing on a part different from the example described with reference to FIG. 1, and detailed description of parts substantially similar to the example described with reference to FIG. 1 will be omitted. ..

The communication system 1B according to this embodiment includes a terminal device 300, a plurality of base stations 200, and a server 100, as in the example described with reference to FIG. In the present description, as shown in FIG. 13, for convenience, the terminal device 300 includes the terminal devices 300A and 300B, and the plurality of base stations 200 includes the base stations 200A to 200C. Note that some of the base stations 200A to 200C may be under the control of the roaming server 600 as in the example shown in FIG. In this description, in order to make the characteristics of the communication system according to the present embodiment more understandable, the base stations 200A to 200C are under the control of the server 100. Moreover, each of the terminal devices 300A and 300B is assumed to be located in the cell of each of the base stations 200A to 200C. Further, for communication between each terminal device 300 and each base station 200, LPWA using a sub-gigahertz (for example, 900 MHz band) having a wider communication range is applied.

As a method of expanding the coverage in wireless communication, for example, a method in which the transmitting side repeatedly transmits the same frame a plurality of times, and the receiving side synthesizes the plurality of frames repeatedly transmitted can further improve the receiving sensitivity. In the communication system 1 according to the present embodiment, the number of times of repeated transmission is controlled according to the remaining amount of battery power in each terminal device 300. As a specific example, like the terminal device 300B shown in FIG. 13, when the remaining amount of battery power is sufficient, the terminal device 300 periodically predefines the same frame every predetermined period. The transmission is repeated for the number of times (for example, 8 times). On the other hand, when the remaining amount of battery power is low, as in the terminal device 300A shown in FIG. 13, the terminal device 300 reduces the number of times of the repeated transmission for each predetermined period (for example, 2 Times), the execution time of the process related to the transmission may be shortened to reduce the power consumption of the battery.

Further, in the present embodiment, when the server 100 decodes the data from the frame from the terminal device 300 in which the number of transmissions is reduced, the server 100 transmits the frame from the terminal device 300 to a plurality of base stations 200 (for example, base stations). Stations 200A-200C) and synthesize. By such control, even when the number of times that the same frame is repeatedly transmitted from the terminal device 300 is reduced, the frames corresponding to the reduced number of transmissions are supplemented by collecting the frames from more base stations 200. Is possible. When the number of times the same frame is repeatedly transmitted from the terminal device 300 is not reduced, the server 100 may, for example, use the base station 200 closest to the terminal device 300 (in other words, the base station having the highest received signal strength). 200) may be received from the base station 200 and the data may be decoded from the frame.

The outline of the example of the system configuration of the communication system according to the present embodiment has been described above with reference to FIG. 13.

<3.2.2. Frame configuration>
Subsequently, in the communication system according to the present embodiment, an example of a frame configuration of a frame transmitted from the terminal device 300 to the base station 200 will be described. For example, FIG. 14 is an explanatory diagram illustrating an example of a frame configuration of a frame in the communication system according to the present embodiment.

In FIG. 14, reference numeral 801 denotes a PLCP (Physical Layer Convergence Protocol) Service Data Unit (PSDU), which includes data transmitted from the terminal device 300 to the base station 200. The data may include, for example, position information of the terminal device 300, identification information of the terminal device 300, information acquired by the terminal device 300 from various sensors, and the like.

Reference numeral 802 indicates information obtained by encoding PSDU by forward error correction (FEC). An LDPC code or the like is used for the encoding, for example.

The reference numeral 803 may include a plurality of identical blocks (coded blocks) encoded by FEC. For example, when the number of repeated transmissions is 3, three identical blocks are included. In addition, regarding the last block, in order to adjust the packet length, certain information is removed as a Punctured block.

Reference numeral 804 indicates data in which guard bits are added before and after the block indicated by reference numeral 803.

Reference numeral 805 indicates a PLCP Protocol Data Unit (PPDU) generated by inserting a synchronization signal and scrambling the data indicated by reference numeral 804.

The terminal device 300 performs modulation such as BPSK (Binary Phase Shift Keying) on the PPDU indicated by reference numeral 804, and transmits the modulated frame to the base station 200.

For example, reference numeral 806 schematically shows an example of the case where the same PPDU (in other words, a frame) is repeatedly transmitted using M time slots.

The example of the frame configuration of the frame transmitted from the terminal device 300 to the base station 200 in the communication system according to this embodiment has been described above with reference to FIG.

<3.2.3. Processing>
Subsequently, an example of a flow of a series of processes of the communication system according to the present embodiment will be described. For example, FIG. 15 is a sequence diagram showing an example of a flow of a series of processes of the communication system according to the present embodiment. Further, in this description, the communication system has a system configuration as shown in FIG.

The terminal device 300 receives the wireless signal transmitted from the GPS satellite 500 and acquires its own position information based on the reception result of the wireless signal (S501).

The terminal device 300 counts the number of base stations 200 existing within a specified range (for example, within a radius of 2 km) based on its own position information, and determines the number of the base stations 200 and the remaining amount of battery power. , The number of repeated transmissions of data such as a code block and PPDU is determined (S503). In the present embodiment, data to be repeatedly transmitted such as the code block and the PPDU is also referred to as “frame information”.

For example, Table 1 below shows an example of the relationship between the number of surrounding base stations, the remaining amount of battery power, and the number of repeated transmissions.

In the example shown in Table 1, the maximum number of repeated transmissions is eight, and when the number of surrounding base stations 200 is two or more and the battery remaining capacity is less than or equal to the threshold value, the number of repeated transmissions is limited. ing. As a specific example, when the number of surrounding base stations is two and the remaining amount of battery power is 30% or less and exceeds 20%, the number of repeated transmissions is set to six. That is, when the number of surrounding base stations is two and the remaining amount of battery power is 30% or less, the number of repeated transmissions is limited. As another example, when the number of surrounding base stations is three or more, the number of repeated transmissions is set to six when the remaining battery power is 40% or less and exceeds 30%. It That is, when the number of surrounding base stations is three or more and the remaining amount of battery power is 40% or less, the number of repeated transmissions is limited.

Next, the terminal device 300 repeatedly transmits frame information based on data (for example, position information of the terminal device 300) to be transmitted to the base station 200 to surrounding base stations 200 according to the determined number of times. In the present description, base stations 200A to 200C are assumed to exist around the terminal device 300. That is, the frame information transmitted from the terminal device 300 is received by each of the base stations 200A to 200C (S505A to S505C).

Note that the unit of repeated transmission is not particularly limited as long as frame information (for example, code block, PPDU, etc.) is repeatedly transmitted to base station 200. That is, the number of code blocks forming the PPDU may be controlled according to the determined number of repeated transmissions. Further, as another example, the number of time slots for transmitting a PPDU may be controlled according to the determined number of repeated transmissions.

Further, as another example, the number of code blocks and the number of time slots for transmitting PPDUs may be individually controlled. For example, Table 2 below shows another example of the relationship between the number of surrounding base stations, the remaining amount of battery power, and the number of repeated transmissions. The number of code blocks and PPDUs are transmitted. An example of individually controlling the number of time slots to be performed is shown.

In addition, as illustrated in FIG. 15, the server 100, according to the information such as the time when the frame information is scheduled to be received from the terminal device 300 and the frequency band used by the terminal device 300 to transmit the frame information, The target base station 200 is requested to transmit the frame information from the terminal device 300. For example, in the example shown in FIG. 15, the server 100 requests the base station 200A to transmit the frame information (S507A). Then, the server 100 acquires the frame information from the base station 200A as a response to the request (S509A).

Next, the server 100 demodulates and analyzes the acquired frame information, and confirms whether the number of times the frame information is repeatedly transmitted from the terminal device 300 is less than or equal to a threshold value (S511). When the number of repeated transmissions from the target terminal device 300 is less than or equal to the threshold, the server 100 is located in the vicinity of the terminal device 300 among the base stations 200 managed by the server 100 and is connected to the base station 200A. Requests transmission of frame information to another different base station 200. For example, in the example illustrated in FIG. 15, the server 100 requests each of the base stations 200B and 200C to transmit the frame information (S507B, S507C). Then, the server 100 acquires the frame information from each of the base stations 200B and 200C as a response to the request (S509B, S509C).

Next, the server 100 combines the frame information acquired from each of the base stations 200 (that is, the base stations 200A to 200C), and performs demodulation processing on the frame information whose signal level has been increased by the combination, thereby performing the terminal device. The data transmitted from 300 is decrypted (S513).

Heretofore, an example of the flow of a series of processes of the communication system according to the present embodiment has been described with reference to FIG. 15.

Next, with reference to FIG. 16, an example of a flow of a series of processes of the terminal device 300 in the example illustrated in FIG. 15 will be described. FIG. 16 is a flowchart for explaining an example of the flow of a series of processes of the terminal device 300 according to this embodiment.

First, the terminal device 300 receives a wireless signal transmitted from the GPS satellite 500, and acquires its own position information based on the reception result of the wireless signal (S601).

In addition, the terminal device 300 acquires information about its own battery (that is, information about the remaining amount of battery power) (S603).

The terminal device 300 determines whether the remaining amount of battery power is less than or equal to a threshold value based on the acquired information about the battery (S605).

When the remaining amount of battery power is less than or equal to the threshold value (S605, YES), the terminal device 300 determines the number of base stations 200 existing within the specified range (in other words, communication based on the acquisition result of its position information). The number of possible base stations 200) is counted and it is determined whether the number of base stations 200 is equal to or more than a threshold value (S607). Specifically, the terminal device 300 collates the position information of each base station 200 acquired in advance with the result of the position information of the terminal device 300, so that the terminal device 300 exists within a specified range centered on itself. The number of 200 may be counted. Of course, the method is not particularly limited as long as the terminal device 300 can recognize the number of base stations 200 existing within the specified range. As a specific example, when the terminal device 300 is capable of bidirectional communication with the base station 200, the terminal device 300 transmits a request to the surrounding base stations 200 and responds to the request. The number of base stations 200 located in the vicinity may be recognized according to the number of responses.

When the number of base stations 200 existing within the specified range is equal to or more than the threshold value (S607, YES), the terminal device 300 determines the remaining battery power level and the number of the base stations 200. , And controls (limits) the number of times of repeated transmission of data (for example, code block or frame information) (S609). On the other hand, when the remaining amount of battery power exceeds the threshold (S605, NO), or when the number of base stations 200 existing within the specified range is less than the threshold (S607, NO), the terminal device 300 It is not necessary to control the number of repeated transmissions.

Then, the terminal device 300 executes repeated data transmission to the surrounding base stations 200 according to the finally determined number of repeated transmissions (S611).

The example of the flow of the series of processes of the terminal device 300 in the example illustrated in FIG. 15 has been described above with reference to FIG. 16.

Next, with reference to FIG. 17, an example of the flow of a series of processes of the server 100 in the example shown in FIG. 15 will be described. FIG. 17 is a flowchart for explaining another example of the flow of a series of processes of the server 100 according to this embodiment.

When the scheduled time at which the frame information is received by the base station 200 from the target terminal device 300 has passed, the server 100 requests the base station 200 to transmit the frame information, and sends the frame information to the base station. It is acquired from 200 (S651).

When the frame information is received from the target terminal device 300 for the first time, the server 100 may acquire the frame information from the base station 200 corresponding to the area where the terminal device 300 is set up. Further, after that, the server 100 may acquire the frame information transmitted from the terminal device 300 from the base station 200 according to the position information transmitted by the terminal device 300.

Next, the server 100 demodulates and analyzes the acquired frame information (S653), and confirms whether the number of times the frame information is repeatedly transmitted from the terminal device 300 is less than or equal to a threshold value (S655).

When the number of repeated transmissions is equal to or less than the threshold value (S655, YES), the server 100 selects one of the base stations 200 managed by itself from another base station 200 located around the target terminal device 300. Request transmission of frame information. Then, the server 100 acquires the frame information from the other base station 200 as a response to the request (S657). Then, the server 100 combines the frame information acquired from each base station 200 to generate frame information with a further increased signal level.

When the number of repeated transmissions exceeds the threshold value (S655, NO), the server 100 does not execute the process related to acquisition of frame information from another base station 200 or the process related to frame information combination. May be.

Then, the server 100 decodes the data transmitted from the terminal device 300 by performing demodulation processing on the frame information (S661).

Heretofore, an example of the flow of a series of processes of the server 100 in the example shown in FIG. 15 has been described with reference to FIG.

<3.3. Evaluation>
As described above, in the communication system according to the present embodiment, the terminal device controls so that frame information (eg, code block, PPDU, etc.) is repeatedly transmitted to one or more base stations via wireless communication. .. In addition, the terminal device acquires information regarding the state of the battery. Then, the terminal device, in accordance with the battery state and the number of base stations capable of transmitting frame information via the wireless communication, transmits frame information to one or more base stations within a predetermined period. Controls the number of times that is sent. Further, the server acquires frame information repeatedly transmitted from the terminal device to one or more base stations via wireless communication from at least a part of the one or more base stations, and the acquired frame information is acquired. Demodulate data from frame information. At this time, the frame information is acquired from the number of base stations corresponding to the number of times the frame information is transmitted from the terminal device within a predetermined period.

With the above configuration, according to the communication system according to the present embodiment, the terminal device determines the remaining amount of battery power and the number of surrounding base stations (that is, base stations capable of transmitting frame information). , It is possible to suppress the power consumption amount related to the transmission of the frame information. In particular, in an area with more base stations, such as an urban area, the number of repeated transmissions is controlled in consideration of the number of base stations around the terminal device, so that power consumption for transmitting frame information is consumed. The effect that the amount can be further suppressed can be expected. Further, even when the number of repeated transmissions is small, it is possible to improve the performance related to demodulation of the data transmitted from the terminal device 300 by combining the frame information received by the plurality of base stations.

<<4. Hardware configuration >>
Next, with reference to FIG. 18, an example of a hardware configuration of an information processing device such as the server 100 or the base station 200 that configures the communication system according to the embodiment of the present disclosure will be described in detail. FIG. 18 is a functional block diagram showing a configuration example of the hardware configuration of the information processing device configuring the communication system according to the embodiment of the present disclosure.

The information processing device 900 that configures the system according to the present embodiment mainly includes a CPU 901, a ROM 902, and a RAM 903. The information processing apparatus 900 further includes a host bus 907, a bridge 909, an external bus 911, an interface 913, an input device 915, an output device 917, a storage device 919, a drive 921, and a connection port 923. And a communication device 925.

The CPU 901 functions as an arithmetic processing device and a control device, and controls the overall operation of the information processing device 900 or a part thereof according to various programs recorded in the ROM 902, the RAM 903, the storage device 919 or the removable recording medium 927. The ROM 902 stores programs used by the CPU 901, calculation parameters, and the like. The RAM 903 temporarily stores programs used by the CPU 901, parameters that change appropriately during execution of the programs, and the like. These are connected to each other by a host bus 907 composed of an internal bus such as a CPU bus. For example, each configuration of the processing unit 150 shown in FIG. 2 and each configuration of the processing unit 270 shown in FIG. 3 can be realized by the CPU 901.

The host bus 907 is connected via a bridge 909 to an external bus 911 such as a PCI (Peripheral Component Interconnect/Interface) bus. Further, an input device 915, an output device 917, a storage device 919, a drive 921, a connection port 923, and a communication device 925 are connected to the external bus 911 via an interface 913.

The input device 915 is an operation unit operated by a user, such as a mouse, a keyboard, a touch panel, a button, a switch, a lever, and a pedal. Further, the input device 915 may be, for example, a remote control means (so-called remote control) using infrared rays or other radio waves, or an external connection device such as a mobile phone or a PDA corresponding to the operation of the information processing device 900. It may be 929. Further, the input device 915 includes, for example, an input control circuit that generates an input signal based on the information input by the user using the above-described operation unit and outputs the input signal to the CPU 901. By operating the input device 915, the user of the information processing device 900 can input various data to the information processing device 900 and instruct a processing operation.

The output device 917 is configured by a device capable of visually or auditorily notifying the user of the acquired information. Examples of such devices include display devices such as CRT display devices, liquid crystal display devices, plasma display devices, EL display devices and lamps, audio output devices such as speakers and headphones, and printer devices. The output device 917 outputs, for example, the results obtained by various processes performed by the information processing device 900. Specifically, the display device displays the results obtained by the various processes performed by the information processing device 900 as text or images. On the other hand, the audio output device converts an audio signal composed of reproduced audio data and acoustic data into an analog signal and outputs the analog signal.

The storage device 919 is a data storage device configured as an example of a storage unit of the information processing device 900. The storage device 919 includes, for example, a magnetic storage device such as an HDD (Hard Disk Drive), a semiconductor storage device, an optical storage device, a magneto-optical storage device, or the like. The storage device 919 stores programs executed by the CPU 901, various data, and the like. For example, the storage unit 130 shown in FIG. 2 and the storage unit 260 shown in FIG. 3 can be realized by the storage device 919.

The drive 921 is a reader/writer for recording medium, and is built in or externally attached to the information processing apparatus 900. The drive 921 reads the information recorded in the removable recording medium 927 such as a mounted magnetic disk, optical disk, magneto-optical disk, or semiconductor memory, and outputs it to the RAM 903. The drive 921 can also write a record on a removable recording medium 927 such as a mounted magnetic disk, optical disk, magneto-optical disk, or semiconductor memory. The removable recording medium 927 is, for example, a DVD medium, an HD-DVD medium, a Blu-ray (registered trademark) medium, or the like. The removable recording medium 927 may be a Compact Flash (registered trademark) (CF: Compact Flash), a flash memory, an SD memory card (Secure Digital memory card), or the like. The removable recording medium 927 may be, for example, an IC card (Integrated Circuit card) equipped with a non-contact type IC chip, an electronic device, or the like.

The connection port 923 is a port for directly connecting to the information processing device 900. Examples of the connection port 923 include a USB (Universal Serial Bus) port, an IEEE 1394 port, and a SCSI (Small Computer System Interface) port. Another example of the connection port 923 is an RS-232C port, an optical audio terminal, an HDMI (registered trademark) (High-Definition Multimedia Interface) port, or the like. By connecting the external connection device 929 to the connection port 923, the information processing apparatus 900 acquires various data directly from the external connection device 929 or provides various data to the external connection device 929.

The communication device 925 is, for example, a communication interface including a communication device or the like for connecting to the communication network (network) 931. The communication device 925 is, for example, a communication card for wired or wireless LAN (Local Area Network), Bluetooth (registered trademark), or WUSB (Wireless USB). The communication device 925 may be a router for optical communication, a router for ADSL (Asymmetrical Digital Subscriber Line), a modem for various kinds of communication, or the like. The communication device 925 can send and receive signals and the like to and from the Internet and other communication devices, for example, according to a predetermined protocol such as TCP/IP. The communication network 931 connected to the communication device 925 is configured by a network connected by wire or wirelessly, and may be, for example, the Internet, a home LAN, infrared communication, radio wave communication, satellite communication, or the like. .. For example, the network communication unit 110 shown in FIG. 2, the wireless communication unit 220, the network communication unit 230, and the satellite signal receiving unit 250 shown in FIG. 3 can be realized by the communication device 925.

Heretofore, an example of the hardware configuration capable of realizing the functions of the information processing device 900 that constitutes the system according to the embodiment of the present disclosure has been shown. Each component described above may be configured using a general-purpose member, or may be configured by hardware specialized for the function of each component. Therefore, it is possible to appropriately change the hardware configuration to be used according to the technical level at the time of implementing the present embodiment. Although not shown in FIG. 18, various configurations corresponding to the information processing apparatus 900 that configures the system are naturally provided.

Note that it is possible to create a computer program for realizing each function of the information processing apparatus 900 that constitutes the information processing system according to the present embodiment as described above, and install the computer program in a personal computer or the like. It is also possible to provide a computer-readable recording medium in which such a computer program is stored. The recording medium is, for example, a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, or the like. Further, the above computer program may be distributed via a network, for example, without using a recording medium. Further, the number of computers that execute the computer program is not particularly limited. For example, the computer program may be executed by a plurality of computers (for example, a plurality of servers) in cooperation with each other.

<<5. Conclusion >>
Although the preferred embodiments of the present disclosure have been described above in detail with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field of the present disclosure can come up with various changes or modifications within the scope of the technical idea described in the claims. It is understood that the above also naturally belongs to the technical scope of the present disclosure.

Further, the effects described in the present specification are merely illustrative or exemplary, and are not limitative. That is, the technique according to the present disclosure may have other effects that are apparent to those skilled in the art from the description of the present specification, in addition to or instead of the above effects.

Further, the effects described in the present specification are merely illustrative or exemplary, and are not limitative. That is, the technique according to the present disclosure may have other effects that are apparent to those skilled in the art from the description of the present specification, in addition to or instead of the above effects.

The following configurations also belong to the technical scope of the present disclosure.
(1)
Predetermined control information related to the frame information transmitted from the terminal device to each of the plurality of base stations via wireless communication, an acquisition unit that acquires from each of the plurality of base stations,
Based on the control information acquired from each of the plurality of base stations, a processing unit that identifies the base station that acquires the payload included in the frame information,
An information processing device comprising:
(2)
The processing unit identifies the base station that acquires the payload from the plurality of base stations according to the strength of a received signal from the terminal device in each of the plurality of base stations, The above (1) Information processing equipment.
(3)
The processing unit estimates the position of the terminal device based on predetermined control information that is acquired from each of the plurality of base stations and that is included in the frame information and that is different from the payload, the (1) or The information processing device according to (2).
(4)
The information processing device according to (3), wherein the acquisition unit acquires the payload from the specified base station after the position of the terminal device is estimated.
(5)
The information processing device according to (4), wherein the predetermined control information related to the frame information is predetermined control information different from the payload.
(6)
The acquisition unit acquires the payload from the specified base station by acquiring the frame information from the specified base station before the position of the terminal device is estimated. Information processing device.
(7)
The information processing device according to (6), wherein the predetermined control information related to the frame information is information according to a reception status of the frame information by the base station.
(8)
The acquisition unit acquires the control information from other base stations not included in the plurality of base stations when the number of the base stations that have acquired the predetermined control information different from the payload is less than a threshold value. ,
The processing unit estimates the position of the terminal device based on the control information acquired by each of the plurality of base stations and the other base station,
The information processing device according to any one of (3) to (7).
(9)
An acquisition unit that acquires frame information from a terminal device via wireless communication,
Predetermined control information related to the acquired frame information, a control unit that controls to be transmitted to a predetermined server,
Equipped with
The control unit controls the payload included in the frame information to be transmitted to the server in response to a request from the server,
base station.
(10)
The control unit is
As the control information, control is performed so that predetermined control information included in the frame information and different from the payload is transmitted to the server,
After the control information is transmitted, the payload is controlled to be transmitted to the server in response to a request from the server,
The base station according to (9) above.
(11)
According to a request from the server, the control unit may transmit one of the frame information and predetermined control information different from the payload included in the frame information to the server. The base station according to (9), which is controlled.
(12)
A control unit for controlling frame information to be repeatedly transmitted to one or more base stations via wireless communication;
An acquisition unit that acquires information about the battery status,
Equipped with
The control unit is configured to perform one or more of the base stations within a predetermined period according to the state of the battery and the number of the base stations capable of transmitting the frame information via the wireless communication. Controls the number of times frame information is sent,
Terminal device.
(13)
The information on the state of the battery includes information on the remaining amount of electric power of the battery,
The control unit limits the number of times the frame information is transmitted within the predetermined period, as the remaining amount of power of the battery is smaller.
The terminal device according to (12).
(14)
The terminal according to (12) or (13), wherein the control unit suppresses a limit on the number of times the frame information is transmitted when the number of the base stations capable of transmitting the frame information is less than a threshold value. apparatus.
(15)
The terminal device according to any one of (12) to (14), wherein the number of base stations capable of transmitting the frame information is specified according to a detection result of the position of the terminal device.
(16)
An acquisition unit that acquires frame information repeatedly transmitted from the terminal device to one or more base stations via wireless communication, from at least some of the one or more base stations;
A processing unit that demodulates data from frame information acquired from at least some of the base stations,
Equipped with
From a number of the base stations according to the number of times the frame information is transmitted from the terminal device within a predetermined period, the frame information is acquired,
Information processing device.
(17)
The information processing device according to (16), wherein the smaller the number of times the frame information is transmitted from the terminal device within the predetermined period, the larger the number of the base stations from which the frame information is acquired.
(18)
Computer
Obtaining predetermined control information related to frame information transmitted from the terminal device to each of the plurality of base stations via wireless communication, from each of the plurality of base stations,
Based on the control information obtained from each of the plurality of base stations, to specify the base station to obtain the payload included in the frame information,
An information processing method including:
(19)
Computer
Acquiring frame information from the terminal device via wireless communication,
Controlling so that predetermined control information related to the acquired frame information is transmitted to a predetermined server;
Controlling the payload included in the frame information to be transmitted to the server in response to a request from the server,
An information processing method including:
(20)
Computer
Controlling the frame information to be repeatedly transmitted to one or more base stations via wireless communication;
To get information about the battery status,
The frame information is transmitted to one or more base stations within a predetermined period according to the state of the battery and the number of the base stations capable of transmitting the frame information via the wireless communication. Controlling the number of times
An information processing method including:
(21)
Computer
Acquiring frame information repeatedly transmitted from the terminal device to one or more base stations via wireless communication, from at least some of the one or more base stations,
Demodulating data from frame information obtained from at least some of the base stations;
Including
From a number of the base stations according to the number of times the frame information is transmitted from the terminal device within a predetermined period, the frame information is acquired,
Information processing method.

1, 1A, 1B Communication system 100 Server 110 Network communication unit 130 Storage unit 150 Processing unit 151 Communication control unit 153 Information acquisition unit 155 Determination unit 157 Notification unit 200 Base station 210 Antenna unit 220 Wireless communication unit 230 Network communication unit 240 Antenna unit 250 satellite signal reception unit 260 storage unit 270 processing unit 271 communication control unit 273 information acquisition unit 275 notification unit 300 terminal device 310 antenna unit 320 wireless communication unit 340 antenna unit 350 satellite signal receiving unit 360 storage unit 370 processing unit 371 communication control unit 373 information acquisition unit 375 determination unit 377 notification unit 400 client 500 GPS satellite 600 roaming server

Claims (21)

Predetermined control information related to the frame information transmitted from the terminal device to each of the plurality of base stations via wireless communication, and an acquisition unit that acquires from each of the plurality of base stations,
Based on the control information acquired from each of the plurality of base stations, a processing unit that identifies the base station that acquires the payload included in the frame information,
An information processing device comprising: The processing unit specifies, from the plurality of base stations, the base station that acquires the payload according to the strength of a received signal from the terminal device in each of the plurality of base stations. Information processing device. The processing unit estimates the position of the terminal device based on predetermined control information, which is included in the frame information and is different from the payload, that is acquired from each of the plurality of base stations. Information processing equipment. The information processing device according to claim 3, wherein the acquisition unit acquires the payload from the specified base station after the position of the terminal device is estimated. The information processing apparatus according to claim 4, wherein the predetermined control information related to the frame information is predetermined control information different from the payload. The information according to claim 3, wherein the acquisition unit acquires the payload from the specified base station by acquiring the frame information from the specified base station before the position of the terminal device is estimated. Processing equipment. The information processing apparatus according to claim 6, wherein the predetermined control information related to the frame information is information according to a reception status of the frame information by the base station. The acquisition unit acquires the control information from other base stations not included in the plurality of base stations when the number of the base stations that have acquired the predetermined control information different from the payload is less than a threshold value. ,
The processing unit estimates the position of the terminal device based on the control information acquired by each of the plurality of base stations and the other base station,
The information processing device according to claim 3. An acquisition unit that acquires frame information from a terminal device via wireless communication,
Predetermined control information related to the acquired frame information, a control unit that controls to be transmitted to a predetermined server,
Equipped with
The control unit controls the payload included in the frame information to be transmitted to the server in response to a request from the server,
base station. The control unit is
As the control information, control is performed so that predetermined control information included in the frame information and different from the payload is transmitted to the server,
After the control information is transmitted, the payload is controlled to be transmitted to the server in response to a request from the server,
The base station according to claim 9. In response to a request from the server, the control unit is configured to transmit one of the frame information and predetermined control information different from the payload included in the frame information to the server. The base station according to claim 9, which is controlled. A control unit for controlling frame information to be repeatedly transmitted to one or more base stations via wireless communication;
An acquisition unit that acquires information about the battery status,
Equipped with
The control unit may be configured to perform one or more of the base stations within a predetermined period according to the state of the battery and the number of the base stations capable of transmitting the frame information via the wireless communication. Controls the number of times frame information is sent,
Terminal device. The information on the state of the battery includes information on the remaining amount of electric power of the battery,
The control unit limits the number of times the frame information is transmitted within the predetermined period, as the remaining amount of power of the battery is smaller.
The terminal device according to claim 12. The terminal device according to claim 12, wherein the control unit suppresses a limitation on the number of times the frame information is transmitted when the number of the base stations capable of transmitting the frame information is less than a threshold value. The terminal device according to claim 12, wherein the number of the base stations capable of transmitting the frame information is specified according to the detection result of the position of the terminal device. An acquisition unit that acquires frame information repeatedly transmitted from the terminal device to one or more base stations via wireless communication, from at least some of the one or more base stations;
A processing unit that demodulates data from frame information acquired from at least some of the base stations,
Equipped with
From a number of the base stations according to the number of times the frame information is transmitted from the terminal device within a predetermined period, the frame information is acquired,
Information processing device. The information processing apparatus according to claim 16, wherein the smaller the number of times the frame information is transmitted from the terminal device within the predetermined period, the larger the number of the base stations from which the frame information is acquired. Computer
Obtaining predetermined control information related to the frame information transmitted from the terminal device to each of the plurality of base stations via wireless communication, and from each of the plurality of base stations,
Based on the control information obtained from each of the plurality of base stations, to specify the base station to obtain the payload included in the frame information,
An information processing method including: Computer
Acquiring frame information from the terminal device via wireless communication,
Controlling so that predetermined control information related to the acquired frame information is transmitted to a predetermined server;
Controlling the payload included in the frame information to be transmitted to the server in response to a request from the server;
An information processing method including: Computer
Controlling the frame information to be repeatedly transmitted to one or more base stations via wireless communication;
To get information about the battery status,
Depending on the state of the battery and the number of the base stations capable of transmitting the frame information via the wireless communication, the frame information is transmitted to one or more base stations within a predetermined period. Controlling the number of times
An information processing method including: Computer
Acquiring frame information repeatedly transmitted from the terminal device to one or more base stations via wireless communication, from at least some of the one or more base stations,
Demodulating data from frame information obtained from at least some of the base stations;
Including
From a number of the base stations according to the number of times the frame information is transmitted from the terminal device within a predetermined period, the frame information is acquired,
Information processing method.

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