JP7033955B2 - Control station and control method to control communication of mobile terminal - Google Patents

Description

The present invention generally relates to the control of communication of a mobile terminal via a mobile communication network.

A control station connected to a radio base station that communicates with a mobile terminal and a data server that distributes information to the mobile is known. Information distribution to the mobile terminal is performed in response to a request received from the mobile terminal by the control station or the data server, or by active processing of the data server. If any failure occurs in the data server or communication network, the mobile terminal will not be able to obtain information from the data server. When the failure is subsequently recovered, a large number of mobile terminals issue requests all at once, so that congestion occurs due to such a large number of requests or information distribution in response to a large number of requests. In the technique described in Patent Document 1, congestion can be prevented by automatically turning off the power of the mobile terminal from the exchange for the mobile terminal that does not use the mobile communication service.

Japanese Patent Application No. 2001-184822

In recent years, the development and utilization of mobile terminals called autonomous mobility systems have been promoted. According to the Ministry of Internal Affairs and Communications of Japan, the "autonomous mobility system" utilizes various sensor information, etc., and utilizes automatic driving technology, automatic control technology, etc. in cooperation with ICT (Information and Communication Technology) basic technology. Vehicles, electric wheelchairs, robots, unmanned construction machines, small unmanned machines, etc. that realize highly reliable and highly accurate movement. As used herein, the term "autonomous mobility system" means all mobile terminals that are autonomously controlled.

Even in a system in which each of the plurality of mobile terminals is an autonomous mobility system, there is a problem of congestion after recovery from a failure.

Solving such a problem by automatically turning off the power of the mobile terminal as in Patent Document 1 cannot be easily applied to a system in which the mobile terminal is an autonomous mobility system. .. This is because turning off the power of the terminal from the outside automatically stops the autonomous control from the outside.

Therefore, for each of the two or more mobile terminals, the control station acquires the movement status including at least one of the latest moving speed and the latest staying time length of the mobile terminal, and the two or more. At least one of the following, based on the movement status acquired for each of the mobile terminals in
(A) For each of the two or more mobile terminals, controlling the issuance of a request to the control station or data server by the mobile terminal, and
(B) Controlling information distribution by at least one data server,
I do.

According to the present invention, it is possible to prevent congestion in a system in which each of the plurality of mobile terminals is an autonomous mobility system without turning off the power of the mobile terminals.

It is an example of the block diagram of the network system including the control station which concerns on one Embodiment of this invention. This is an example of a configuration diagram of a mobile terminal. This is an example of a configuration diagram of a control station and a data server. It is a schematic diagram which shows the example of the method of calculating the moving speed of a mobile terminal. It is a schematic diagram which shows the example of the method of calculating the movement distance based on the movement route of a mobile terminal. It is a figure which shows the example of the movement management data which shows the distribution order based on the movement speed of a mobile terminal. It is a figure which shows the example of the movement management data which shows the delivery order based on the staying time length of a mobile terminal. It is a figure which shows the example of the movement management data which shows the distribution order based on the information amount of the information to be delivered to a mobile terminal. It is a figure which shows the example of the movement management data which shows the delivery order based on the service level of a mobile terminal. It is a figure which shows the example of the ordinal data. It is a figure which shows the sequence example about the delivery control according to the delivery order. It is a figure which shows the sequence example about the request timing control. It is a figure which shows the 1st example of permission / rejection of the request from a mobile terminal. It is a figure which shows the 2nd example of permission / rejection of the request from a mobile terminal. It is a schematic diagram which shows the example which the mobile terminal autonomously controls a request issuance timing. It is a schematic diagram which shows the example of the delivery control instead of the delivery order determination.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, the present invention is not construed as being limited to the contents of the embodiments shown below, and any person skilled in the art can change the specific configuration thereof without departing from the idea or purpose of the present invention. Can be easily interpreted. The position, size, shape, range, etc. of each configuration shown in the drawings and the like may not represent the actual position, size, shape, range, etc. in order to facilitate understanding of the invention. Therefore, the present invention is not necessarily limited to the position, size, shape, range and the like disclosed in the drawings and the like.

Further, in the following description, the "interface unit" may be one or more interfaces. The one or more interfaces may be one or more communication interface devices of the same type (for example, one or more NICs (Network Interface Cards)) or two or more different types of communication interface devices (for example, NICs and HBAs (Host Bus Adapters)). )) May be.

Further, in the following description, the "memory unit" is one or more memories, and may be typically a main storage device. At least one memory in the memory unit may be a volatile memory or a non-volatile memory.

Further, in the following description, the "PDEV unit" is one or more PDEVs, and typically may be an auxiliary storage device. "PDEV" means a physical storage DEVice, typically a non-volatile storage device.

Further, in the following description, the "storage unit" is at least one of the memory unit and the PDEV unit (typically, at least the memory unit).

Further, in the following description, the "processor unit" is one or more processors. The at least one processor is typically a microprocessor such as a CPU (Central Processing Unit), but may be another type of processor such as a GPU (Graphics Processing Unit). At least one processor may be single-core or multi-core. The at least one processor may be a processor in a broad sense such as a hardware circuit (for example, FPGA (Field-Programmable Gate Array) or ASIC (Application Specific Integrated Circuit)) that performs a part or all of the processing.

Further, in the following description, the function may be described by the expression of "kkk unit" (excluding the interface unit, the storage unit, and the processor unit), but the function is such that one or more computer programs are executed by the processor unit. It may be realized by one or more hardware circuits (for example, FPGA (Field-Programmable Gate Array) or ASIC (Application Specific Integrated Circuit)). When the function is realized by executing the program by the processor unit, the specified processing is appropriately performed by using the storage unit and / or the interface unit, so that the function is at least a part of the processor unit. May be. The process described with the function as the subject may be a process performed by a processor unit or a device having the processor unit. The program may be installed from the program source. The program source may be, for example, a program distribution computer or a computer-readable recording medium (for example, a non-temporary recording medium). The description of each function is an example, and a plurality of functions may be combined into one function, or one function may be divided into a plurality of functions. In the following description, the kkk unit includes an autonomous control unit, a communication control unit, a movement status acquisition unit, an I / O control unit, and a distribution control unit.

Further, in the following description, a common code in the reference code may be used when the same type of element is not distinguished, and a reference code may be used when the same type of element is described separately. For example, when the mobile terminal is described without any distinction, it is described as "mobile terminal 101", and when the individual mobile terminals are described separately, the "mobile terminal 101A" and "mobile terminal 101" are described. It may be described as "Terminal 101B".

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an example of a configuration diagram of a network system including a control station according to an embodiment.

A communication network (for example, a network such as the Internet) 100 includes a plurality of radio base stations 201, a control station 301 that controls each radio base station 201, and a data server 401 that provides information necessary for control to a mobile terminal 101. It is connected to the. As shown by the broken line, the control station 301 and one or more data servers 401 may exist for each radio base station 201, but the control station 301 and the data server are described below for the sake of simplicity. It is assumed that 401 is common to a plurality of radio base stations 201.

For each radio base station 201, there is an area (may be called a "cell") 110 as a range (communication area) covered by the radio base station 201. Each of the plurality of mobile terminals 101, each of which is an autonomous mobility system, can communicate with each other via the radio base station 201 covering the area 110 by entering any of the areas 110. In the illustrated example, there are areas 110A to 110C corresponding to the radio base stations 201A to 201C, respectively, and mobile terminals 101A to 101C exist in the areas 110A to 110C, respectively.

The mobile terminal 101 controls the mobile terminal 101 (typically) with respect to the control station 301 (or the data server 401) via the radio base station 201 that covers the area 110 in which the mobile terminal 101 exists. Issuance of requests for information necessary for autonomous control). The data server 401 distributes information necessary for control to the mobile terminal 101 in response to a request received via or not via the control station 301.

If any failure occurs in at least one of the data server 401, the control station 301, and the communication network 100, the mobile terminal 101 cannot obtain the information necessary for control from the data server 401. After that, when the failure is recovered, the plurality of mobile terminals 101 including the mobile terminal 101 issue a request all at once via the radio base station 201. Therefore, congestion occurs. Congestion includes at least one of the following congestions.
-Line congestion.
-At least one congestion of the control station 301 and the data server 401.

Hereinafter, this embodiment will be described in detail. As a control station, software-defined control realized by executing software for realizing a function as a control station by one or more computers (for example, a general-purpose computer) in a computer system (for example, a cloud platform). A station may be adopted, but in the present embodiment, the control station 301 is assumed to be a physical device.

FIG. 2 is an example of a configuration diagram of the mobile terminal 101.

The mobile terminal 101 is an autonomous mobility system that is autonomously controlled (typically autonomously moved), and has an autonomous control system 1000. The autonomous control system 1000 has a sensor group 1010, a computational resource group 1050, and an autonomous control unit 1060 realized on the computational resource group 1050.

The sensor group 1010 is various sensors (for example, a depth sensor, an environment sensor, a motion sensor, an inclination sensor, a GPS (Global Positioning System) sensor).

The computational resource group 1050 is various computational resources, typically an interface unit, a storage unit, and a processor unit connected to them.

The autonomous control unit 1060 performs autonomous control of the mobile terminal 101. For example, the autonomous control unit 1060 measures and measures the movement status including at least one of the latest movement speed and the latest stay time length of the mobile terminal 101 periodically or irregularly. The movement status data indicating the movement status may be stored in the storage unit. The "latest moving speed" is the moving speed (for example, average speed) from the past time point (a certain time past time point) to the present time point, for example, the moving distance and the time length between the past time point and the present time point. It is a value calculated based on. The "latest staying time" is the continuous staying time from the past time point (a certain time past time point) to the present time point. For example, when staying for 1 minute between the past time point and the present time point and staying for 2 minutes after moving, the latest staying time length is "2 minutes".

FIG. 3 is an example of a configuration diagram of the control station 301 and the data server 401.

The control station 301 has a calculation resource group 3000. The communication control unit 3002 and the movement status acquisition unit 3003 are realized on the calculation resource group 3000. Further, the movement management data 3001, the position management data 3004, the map data 3005, and the road data 3006 are stored.

The calculation resource group 3000 is various calculation resources, and is typically an interface unit, a storage unit, and a processor unit connected to them. The communication network 100 is connected to the interface unit. Communication is performed with the autonomous control system 1000 of each mobile terminal 101 and the data server 401 via the interface unit. At least one radio base station 201 may be connected to the interface unit. The above-mentioned data 3001 and 3004 to 3006 are stored in the storage unit. The communication control unit 3002 and the movement status acquisition unit 3003 may be realized by the processor unit executing one or more computer programs.

The communication control unit 3002 controls at least one of the communication with the mobile terminal 101 and the communication with the data server 401 for controlling the communication of the mobile terminal 101.

The movement status acquisition unit 3003 acquires, for each mobile terminal 101, a movement status including at least one of the latest movement speed and the latest staying time length of the mobile terminal 101. The movement status acquisition unit 3003 can transmit a read request for reading the map data of the map portion including the desired position and a read request for reading the desired road data to the data server 401.

The movement management data 3001 is data indicating the acquired movement status for each mobile terminal 101.

The position management data 3004 is time-series data of the position of each mobile terminal 101. For each mobile terminal 101, the position may be acquired by the movement status acquisition unit 3003 periodically communicating with the mobile terminal 101.

The map data 3005 is data acquired from the data server 401, and is, for example, data of a map portion in a certain range including the position of the mobile terminal 101 for each mobile terminal 101.

The road data 3006 is data acquired from the data server 401 (and at least one of the other servers) and is data about the road.

The data server 401 may be a software-defined data server, but in the present embodiment, it is a physical server device having a calculation resource group 4000. The I / O (Input / Output) control unit 4002 and the distribution control unit 4003 are realized on the calculation resource group 4000. Further, the map DB (database) 4005 and the road DB 4006 are stored.

The calculation resource group 4000 is various calculation resources, and is typically an interface unit, a storage unit, and a processor unit connected to them. The communication network 100 is connected to the interface unit. Communication is performed with the autonomous control system 1000 of each mobile terminal 101 and the control station 301 via the interface unit. The above-mentioned DB4005 and 4006 are stored in the storage unit. The I / O control unit 4002 and the distribution control unit 4003 may be realized by the processor unit executing one or more computer programs.

The I / O control unit 4002 performs I / O to the map DB 4005 or the road DB 4006 in response to the I / O request from the control station 301, and returns a result (for example, read map data or road data).

The distribution control unit 4003 controls the information distribution to the mobile terminal 101.

Map DB4005 is a database of data of a wide area map (for example, a map of the whole of Japan). The road DB 4006 is a database of data indicating a road traffic condition (for example, data indicating a congestion status, traffic regulation according to a time zone, traffic regulation due to an accident, and the like).

Regarding the movement status acquisition unit 3003 in the control station 301, the movement status of each mobile terminal 101 may be acquired by any of the following. In the case of (Y), the movement status acquisition unit 3003 transmits a read request for reading the map data of the map portion including the desired position and a read request for reading the desired road data to the data server 401. Can be done.
(X) Acquiring movement status data from the mobile terminal 101. The "movement status data" is data indicating a movement status measured by using the sensor group 1010 of the mobile terminal 101.
(Y) The movement status is measured by the movement status acquisition unit 3003 based on the time-series position (position grasped from the position management data 3004) of the mobile terminal 101.

Regarding (Y), the moving speed is as follows, for example. That is, the movement status acquisition unit 3003 acquires the time-series position of the mobile terminal 101B to be measured from the position management data 3004. As shown in FIG. 4, the movement status acquisition unit 3003 moves from the area 110B covered by the radio base station 201B to the area 110A covered by the radio base station 201A from the time-series position acquired for the mobile terminal 101B. Know that the terminal 101B has moved. The movement status acquisition unit 3003 calculates the movement speed for each unit measurement time based on the distance traveled by the mobile terminal 101B during the unit measurement time. As shown in FIG. 5, the calculation of the moving distance is based on the position of the mobile terminal 101B and the map data 3005 of the map portion including the position. _The movement status acquisition unit 3003 calculates the movement distance L according to the movement route 510 from the position P1 to the position _P2 from the measurement start _time t1 to the measurement end time t2 ₍ the movement route 510 is calculated as necessary. (Refer to the road data 3006), and the movement speed is calculated based on the calculated movement distance L and the measurement time T (difference between t ₂ and t ₁ ). The moving speed of the mobile terminal 101 may change from moment to moment. Therefore, the movement status acquisition unit 3003 measures the movement speed of the mobile terminal 101 periodically (or irregularly).

Regarding (Y), the length of stay is as follows, for example. The movement status acquisition unit 3003 calculates the continuous stay time length based on the time-series position of the mobile terminal 101. The length of stay of the mobile terminal 101 may change from moment to moment, similar to the moving speed. Therefore, the movement status acquisition unit 3003 periodically (or irregularly) measures the length of stay of the mobile terminal 101.

When the communication control unit 3002 in the control station 301 receives a request from the mobile terminal 101, the amount of information to be delivered to the mobile terminal 101 may be specified by inquiring, for example, the data server 401. .. The distributed information may be, for example, information on a map portion distributed based on the latest position of the mobile terminal 101, information on a road following the position, or the like. Since the information delivered to the mobile terminal 101 may differ depending on the position of the mobile terminal 101 (or the road including the position), the amount of information about the mobile terminal 101 may change from moment to moment. Therefore, the communication control unit 3002 in the control station 301 may update the amount of information about the mobile terminal 101 periodically (or irregularly).

Further, for each mobile terminal 101, a service level may be set in place of or in addition to the amount of information. The service level may differ depending on the type of the mobile terminal 101.

According to the above description, each mobile terminal 101 has at least one of a moving speed and a staying time length. For each mobile terminal 101, there may be at least one of an amount of information and a service level.

Therefore, in the present embodiment, the movement management data 3001 includes the movement management data 3001 shown in at least one of FIGS. 6 and 7, and further shown by at least one of FIGS. 8 and 9. There may be movement management data 3001.

The movement management data 3001 shown in FIG. 6 has an entry for each mobile terminal 101, and each entry stores information such as the mobile terminal ID 601 and the movement speed 602 and the distribution order 603. Taking one mobile terminal 101 as an example (“target terminal 101” in the description of FIG. 6), these information are as follows. The mobile terminal ID 601 indicates the ID of the target terminal 101. The moving speed 602 indicates the acquired moving speed of the target terminal 101. The distribution order 603 indicates a distribution order determined based on the moving speed of the target terminal 101.

The distribution order is an element of the distribution order, and the distribution order is determined by the communication control unit 3002 based on the movement speeds of the plurality of mobile terminals 101. For each mobile terminal 101, the determined distribution order is stored as the distribution order 603 by the communication control unit 3002.

The mobile management data 3001 shown in FIG. 7 has an entry for each mobile terminal 101, and each entry stores information such as the mobile terminal ID 701, the staying time length 702, and the distribution order 703. Taking one mobile terminal 101 as an example (“target terminal 101” in the description of FIG. 7), these pieces of information are as follows. The mobile terminal ID 701 is the same as the mobile terminal ID 601 of FIG. The staying time length 702 indicates the acquired staying time length of the target terminal 101. The delivery order 703 indicates a delivery order determined based on the length of stay of the target terminal 101.

The distribution order is determined by the communication control unit 3002 based on the length of stay of the plurality of mobile terminals 101. For each mobile terminal 101, the determined distribution order is stored as the distribution order 703 by the communication control unit 3002.

The mobile management data 3001 shown in FIG. 8 has an entry for each mobile terminal 101, and each entry stores information such as the mobile terminal ID 801 and the information amount 802 and the distribution order 803. Taking one mobile terminal 101 as an example (“target terminal 101” in the description of FIG. 8), these pieces of information are as follows. The mobile terminal ID 801 is the same as the mobile terminal ID 601 of FIG. The information amount 802 indicates the amount of information of the information delivered to the target terminal 101. The distribution order 803 indicates a distribution order determined based on the amount of information distributed to the target terminal 101.

The distribution order is determined by the communication control unit 3002 based on the amount of information distributed to each of the plurality of mobile terminals 101. For each mobile terminal 101, the determined distribution order is stored as the distribution order 803 by the communication control unit 3002.

The mobile management data 3001 shown in FIG. 9 has an entry for each mobile terminal 101, and each entry stores information such as the mobile terminal ID 901, the service level 902, and the distribution order 903. Taking one mobile terminal 101 as an example (“target terminal 101” in the description of FIG. 9), these pieces of information are as follows. The mobile terminal ID 901 is the same as the mobile terminal ID 601 of FIG. The service level 902 indicates the service level of the target terminal 101. The delivery order 903 indicates a delivery order determined based on the service level of the target terminal 101.

The distribution order is determined by the communication control unit 3002 based on the service levels of the plurality of mobile terminals 101. For each mobile terminal 101, the determined distribution order is stored as the distribution order 903 by the communication control unit 3002.

As described above, in the present embodiment, the movement management data 3001 includes the movement management data 3001 shown in at least one of FIGS. 6 and 7, and further, at least one of FIGS. 8 and 9. The movement management data 3001 shown in the figure may be present. Based on the existing mobile management data 3001, the communication control unit 3002 determines the distribution order of information distribution to the plurality of mobile terminals 101. Specifically, for example, the communication control unit 3002, for each of the plurality of mobile terminals 101, is based on the distribution order of one or more in the existing data 1001 among the movement management data 3001 of FIGS. 6 to 9. Determine the final delivery order. The communication control unit 3002 creates the example order data 70 in FIG. 10 as order data in which a plurality of distribution orders corresponding to the plurality of mobile terminals 101 are recorded, and transmits the created order data 70 to the data server 401. do. The distribution control unit 4003 in the data server 401 distributes information to a plurality of mobile terminals 101 in the distribution order indicated by the order data 70. This prevents information from being distributed all at once, and as a result, it is possible to prevent congestion of lines (for example, the communication network 100 and the radio base station 201).

Specifically, for example, as shown in FIG. 11, in the control station 301, the communication control unit 3002 receives requests from a plurality of mobile terminals 101A to 101C all at once for reasons such as recovery from a failure. S1). In the control station 301, the communication control unit 3002 has a plurality of mobile terminals 101A based on the latest movement status (at least one of the moving speed and the length of stay) of each of the plurality of mobile terminals 101A to 101C. The delivery order of ~ 101C is determined (S2). The communication control unit 3002 transmits order data indicating the determined distribution order to the data server 401 (S3).

The distribution control unit 4003 in the data server 401 that has received the order data distributes the information to the plurality of mobile terminals 101 in the distribution order indicated by the order data. According to the example of FIG. 11, since the distribution order of the mobile terminal 101A is “1”, the distribution order of the mobile terminal 101B is “3”, and the distribution order of the mobile terminal 101C is “2”, first, the mobile body. Information is distributed to the terminal 101A (S4A), then information is distributed to the mobile terminal 101C (S4B), and finally information is distributed to the mobile terminal 101B (S4C). The information to be distributed may be via or not via the control station 301.

The latest movement status of each of the plurality of mobile terminals 101A to 101C is the movement status measured by the movement status acquisition unit 3003, but as shown by the broken line in FIG. 11, it is acquired from each mobile terminal 101. It may be the moved situation. That is, in S1, the movement status acquisition unit 3003 in the control station 301 that received the requests all at once inquires the mobile terminals 101A to 101C about the latest movement status via the radio base stations 201A to 201C, and responds to the inquiry. , The latest mobile status response may be received from the mobile terminals 101A to 101C.

The above is the description of one embodiment. In the above-described embodiment, the provisional delivery order is determined for each of the moving speed, the length of stay, the amount of information, and the service level for each mobile terminal 101, and finally, all the provisional delivery orders are determined. The final delivery order is determined based on, but the determination of the delivery order is not limited to such a method. For example, after the delivery order is determined based on either or both of the travel speed and the length of stay, the delivery order may be adjusted based on at least one of the amount of information and the service level.

The above description will be summarized below. The following summary includes matters not included in the above explanation.

The control station 301 has a movement status acquisition unit 3003 and a communication control unit 3002. The movement status acquisition unit 3003 has the latest movement speed and the latest staying time of the mobile terminal 101 for each of the two or more mobile terminals 101 which are at least a part of the plurality of mobile terminals 101. Acquire the movement status including at least one. The "two or more mobile terminals 101" referred to here may be all mobile terminals 101, or may be mobile terminals 101 from which two or more requests are received by the control station 301 within a certain period of time. The communication control unit 3002 has at least one of the following, based on the movement status acquired for each of the two or more mobile terminals 101.
(A) For each of the two or more mobile terminals 101, controlling the issuance of a request to the control station 301 or the data server 401 by the mobile terminal 101, and
(B) Controlling information distribution by the data server 401,
I do. This makes it possible to prevent congestion in a system in which each mobile terminal 101 is an autonomous mobility system without turning off the power of the mobile terminal 101. By performing both the control of (A) and the control of (B), improvement in the certainty of prevention of congestion can be expected. The control of (A) may be called the control of the mobile terminal 101 side, that is, the control of the front end, and the control of (B) is called the control of the data server 401 side, that is, the control of the back end. It's okay.

The control of (B) includes determining the distribution order to the two or more mobile terminals 101, and accessing the data server 401 so that the information is distributed in the determined distribution order. This prevents information from being distributed all at once, and as a result, it can be expected to prevent line congestion.

In the determined delivery order, the faster the moving speed, the faster the delivery order tends to be. It is conceivable that the information required for the mobile terminal 101 changes in a short time as the moving speed of the mobile terminal 101 increases, and it can be expected to respond to such a case.

Further, in the determined delivery order, the longer the staying time, the later the delivery order tends to be. It is considered that the longer the staying time of the mobile terminal 101 is, the more the information required for the mobile terminal 101 tends to remain the same, and it can be expected to respond to such a case.

For each of the two or more mobile terminals 101, the movement status of the mobile terminal 101 includes both the latest moving speed and the latest staying time length of the mobile terminal 101. In the determined delivery order, the faster the moving speed, the faster the delivery order, and the longer the staying time, the slower the delivery order. As a result, it is possible to flexibly determine the delivery order as described below, and it is expected that the efficiency of preventing congestion will be improved.
-The delivery order of the mobile terminal 101 having a relatively high moving speed and a relatively short staying time is a relatively early order.
-The delivery order of the mobile terminal 101 having a relatively slow moving speed and a relatively long staying time is a relatively slow order.
The delivery order of the mobile terminal 101 having a relatively high moving speed but a relatively long stay time, and the delivery order of the mobile terminal 101 having a relatively slow moving speed but a relatively short staying time are the moving speeds. It is decided based on the balance between the length of stay and the length of stay.

For each of the two or more mobile terminals 101, the communication control unit 3002 has the moving speed (for example, the total or average of the moving speeds) and the staying time length (for example, the staying time length) of the mobile terminal 101 in the latest fixed period. The weights of the movement speed and the length of stay are determined based on the balance with the sum or average of Do at least one. The movement status of the mobile terminal 101 may change from moment to moment, but the tendency of the movement status of the mobile terminal 101 may differ depending on the period. For example, in one period, most may be on the move and the length of stay may be negligible, and in another period, most may be on the move and the length of stay may be negligible. We can flexibly respond to such cases. The weights of the moving speed and the length of stay are further determined based on either the characteristics of the map portion including the position in the latest fixed period and the information of the road including the position. May be done. Further, the "latest fixed period" is preferably a period longer than both the latest measurement time of the moving speed and the latest measurement time of the staying time.

The communication control unit 3002 can perform both the control of (A) and the control of (B). An example of the control of (A) is shown in FIG. When a failure occurs (for example, when a failure occurs in the data server 401), the communication control unit 3002 in the control station 301 transmits a cutoff notification to the mobile terminals 101A to 101C (S11). After that, the communication control unit 3002 checks for the presence or absence of restoration (S12). When recovery is detected, the communication control unit 3002 may consider the latest movement status of the mobile terminal 101 (furthermore, at least one of the amount of information and the service level) for each of the mobile terminals 101A to 101C. ), The request timing of the mobile terminal 101 is determined, and the timing notification, which is the notification of the determined request issuance timing, is transmitted to the mobile terminal 101 (S13). The "request issuance timing" may be at least one of the time length from receiving the timing notification to the issuance of the request and the cycle for issuing the request. In the example of FIG. 12, the request issuance timing is the former. Each mobile terminal 101 issues a request according to the request issuance timing indicated by the received timing notification. Specifically, for example, it is as follows. In the example of FIG. 12, the relationship between D ₁ , D ₂ and D ₃ , which is the time length from receiving the timing notification to issuing the request, is D ₁ <D ₂ <D ₃ . In this way, since the time points at which the data server 401 (or control station 301) receives the request are distributed, it is possible to prevent the data server 401 (or control station 301) from congesting (for example, load concentration) in addition to the line congestion. Can be done.
First, the mobile terminal 101A issues a distribution request to the data server 401 after D1 elapses after receiving the timing notification ( _S14A ). In response to the request, the distribution control unit 4003 of the data server 401 distributes the information to the mobile terminal 101A (S15A).
Next, the mobile terminal 101B issues a distribution request to the data server 401 after D2 has elapsed after receiving the timing notification ( _S14B ). In response to the request, the distribution control unit 4003 of the data server 401 distributes the information to the mobile terminal 101A (S15B).
-After that, the mobile terminal 101C issues a distribution request to the data server 401 after D3 has elapsed after receiving the timing notification ( _S14C ). In response to the request, the distribution control unit 4003 of the data server 401 distributes the information to the mobile terminal 101A (S15C).

As described above, an example of the control of (A) is performed by the communication control unit 3002 on each of the two or more mobile terminals 101 based on both the moving speed and the staying time length (or one of them) of the mobile terminal 101. Includes specifying the determined request issuance timing. For each of the two or more mobile terminals 101, the request issuance timing of the mobile terminal 101 tends to be faster as the moving speed of the mobile terminal 101 is faster, and the length of stay of the mobile terminal 101 is longer. The longer it is, the slower it tends to be. As a result, the faster the moving speed of the mobile terminal 101, the more the information required for the mobile terminal 101 tends to change in a short time, and the longer the staying time of the mobile terminal 101, the longer the moving body. The information required for the terminal 101 can flexibly respond to the same tendency.

In the example of FIG. 12, the timing notification may be transmitted in descending order (fastest order) of the moving speed. Further, the timing notification may be sent in ascending order (shortest order) of the length of stay. The order of issuing timing notifications may be determined from the same viewpoint as the order of delivery.

The control (A) may further include, for each of the two or more mobile terminals 101, determining whether or not to allow the request when the request is received from the mobile terminal 101. .. According to the first example, as shown in FIG. 13, the communication control unit 3002 functions as a filter. That is, the communication control unit 3002 requests the mobile terminal 101 based on the latest movement status of the requesting mobile terminal 101 (furthermore, at least one of the amount of information and the service level may be considered). Whether or not to transfer the request to the data server 401 may be controlled. According to the second example, as shown in FIG. 14, the communication control unit 3002 functions as a proxy. That is, the communication control unit 3002 requests the mobile terminal 101 based on the latest movement status of the requesting mobile terminal 101 (furthermore, at least one of the amount of information and the service level may be considered). You may control the permission / rejection (that is, whether to send the permission or the denial of the connection to the data server 401). For each of the two or more mobile terminals 101, the request of the mobile terminal 101 tends to be permitted as the moving speed of the mobile terminal 101 increases, and the request of the mobile terminal 101 tends to be permitted. The longer the stay, the lower the probability of being allowed. As a result, it can be expected that new information will be preferentially delivered to the mobile terminal 101, which requires new information relatively quickly, while preventing congestion.

For each of the two or more mobile terminals 101, the latest movement status of the mobile terminal 101 is a value measured by the movement status acquisition unit 3003. In a system in which the autonomous mobility system is a mobile terminal 101, either (A) or (B) is required to prevent congestion and maintain that necessary information is delivered when required. It is necessary that the control is also appropriate, and in order for the control to be appropriate, the latest movement status of the mobile terminal 101, which is an information element on which the control is based, must be highly reliable. is necessary. The latest movement status of the mobile terminal 101 may be measured by the mobile terminal 101 and transmitted to the control station 301, but there is a possibility that the movement status may be falsified. Therefore, as the latest movement status of the mobile terminal 101, the value measured by the control station 301 is adopted. As a result, the reliability of the latest mobile status, which is the basis of the control of (A) and (B), is enhanced, and as a result, the mobile terminal 101 needs the information necessary for the mobile terminal 101 while preventing congestion. It can be expected that it will be delivered to the mobile terminal 101 when it is determined.

As illustrated in FIG. 15, each of the two or more mobile terminals 101 may autonomously consider, for example, the latest movement status measured by itself (furthermore, at least one of the amount of information and the service level). ), The request issuance timing (for example, the request issuance cycle (frequency)) may be determined, and the request may be issued to the control station 301 or the data server 401 at the determined request issuance timing. The control of the request issuance timing is performed by the autonomous control unit 1060 (for example, an application executed by the mobile terminal 101). Regarding such an autonomous control unit 1060, for example, the following expressions can be adopted.
A computer program executed by a mobile terminal, which is an autonomous mobility system, and is the latest mobile status (for example, a mobile status measured by the mobile terminal 101 using a sensor group 1010, or a control station. The request issuance timing is determined based on the movement status received from 301), and the request is issued at the determined request issuance timing (for example, issuance to the control station 301 or the data server 401) to the mobile terminal. A computer program to run.
-A mobile terminal that is an autonomous mobility system, the request issuance timing is determined based on the sensor group 1010 and the latest movement status measured using the sensor group 1010, and the request is made at the determined request issuance timing. A mobile terminal having an autonomous control unit 1060 and an autonomous control unit 1060.

In addition to the autonomous control of the request issuance timing of the mobile terminal 101, the control of (A) and (B) may be performed. Each of the plurality of requests received by the control station 301 is a request issued at a timing determined by the movement status of the mobile terminal 101 alone that is the source of the request, and the control station 301 has such a plurality of requests. Can be processed based on the comparison of the movement status of a plurality of mobile terminals 101. Therefore, it can be expected that the certainty of congestion prevention will be improved.

In the control of (B), the order data indicating the distribution order of the two or more mobile terminals 101 is transmitted to the data server 401. This contributes to congestion prevention as compared with transferring two or more requests from two or more mobile terminals 101 to the data server 401 (controlling request issuance from the control station 301 to the data server 401). Can be expected. This is because one ordinal data can be transmitted instead of transferring two or more requests. An example of control for transferring two or more requests from two or more mobile terminals 101 to the data server 401 (that is, another example of the control of (B)) is as shown in FIG. For example, the communication control unit 3002 manages the buffer 40 of the requests from the mobile terminal 101, and determines the transfer order of the plurality of requests stored in the buffer from the same viewpoint as the above-mentioned delivery order. The communication control unit 3002 transfers a plurality of requests to the data server 401 in the determined transfer order. In the example of FIG. 16, the request from the mobile terminal 101A is transferred first, the request from the mobile terminal 101B is transferred second, and the request from the mobile terminal 101C is transferred third. The data server 401 can deliver information to the mobile terminal 101 in response to the transferred request.

In the control of (A) and (B), the service level may be considered with the highest priority. The service level may correspond to the high degree of demand for real-time performance. For example, a high service level may be given to a public vehicle or an emergency vehicle, and a low service level may be given to a general private car. The mobile terminal 101 with a higher service level may tend to be prioritized (for example, the request issuance timing is early (short), the order of delivery or transfer is early, the request is likely to be permitted, etc.). For two or more mobile terminals 101 having the same service level, the communication control unit 3002 controls (A) and (B) based on the latest movement status of the two or more mobile terminals 101. You may do at least one. This makes it possible to prevent congestion while maintaining the real-time performance required for an autonomous mobility system. The amount of information may be further considered in the control of (A) and (B).

Although one embodiment has been described above, this is an example for explaining the present invention, and the scope of the present invention is not limited to this embodiment. The present invention can also be practiced in various other forms.

301: Control station

Claims (9)

Each is an autonomous mobility system, and one or more wireless base stations that communicate with a plurality of mobile terminals that perform autonomous control based on information distributed from the connected data server among one or more data servers, and the above-mentioned A control station connected to one or more data servers,
For each of the two or more mobile terminals that are at least a part of the plurality of mobile terminals, the movement status including at least one of the latest movement speed and the latest staying time length of the mobile terminal. The movement status acquisition unit to be acquired and
At least one of the following, based on the movement status acquired for each of the two or more mobile terminals.
(A) For each of the two or more mobile terminals, controlling the issuance of a request to a control station or a data server by the mobile terminal, and
(B) Controlling information distribution by at least the connected data server,
Equipped with a communication control unit
The control of (B) is
Determining the delivery order to the two or more mobile terminals, and
Accessing at least the connected data server so that information is delivered in the determined delivery order.
Including
For each of the two or more mobile terminals, the movement status of the mobile terminal includes both the latest moving speed and the latest staying time of the mobile terminal.
In the determined delivery order,
The faster the movement speed, the faster the order of delivery tends to be.
The longer the stay, the later the delivery order tends to be.
For each of the two or more mobile terminals, the latest moving speed and the latest staying time length of the mobile terminal are values measured by the moving status acquisition unit.
For each of the two or more mobile terminals, the communication control unit weights each of the moving speed and the staying time length based on the balance between the moving speed and the staying time length of the mobile terminal in the latest fixed period. Determine and perform both (A) and (B) based on each determined weight of travel speed and length of stay.
Control station. The control of (A) is
For each of the two or more mobile terminals, specify the request issuance timing determined by the communication control unit based on the moving speed and the length of stay of the mobile terminal.
Including
For each of the two or more mobile terminals, the request issuance timing of the mobile terminal is set.
The faster the moving speed of the mobile terminal, the faster it tends to be.
The longer the staying time of the mobile terminal, the slower it tends to be.
The control station according to claim 1 . The control of (A) is further controlled.
For each of the two or more mobile terminals, when a request is received from the mobile terminal, it is determined whether or not to allow the request.
Including
For each of the two or more mobile terminals, the request of the mobile terminal is
The faster the moving speed of the mobile terminal, the higher the probability that it will be permitted.
The longer the staying time of the mobile terminal, the lower the probability that it will be permitted.
The control station according to claim 2 . In the control of (B), accessing at least the connected data server so that the information is delivered in the determined delivery order causes the order data indicating the delivery order for the two or more mobile terminals to be the order data. At least send to the data server to connect to,
The control station according to claim 3 . Each is an autonomous mobility system, and one or more wireless base stations that communicate with a plurality of mobile terminals that perform autonomous control based on information distributed from the connected data server among one or more data servers, and the above-mentioned A control station connected to one or more data servers,
For each of the two or more mobile terminals that are at least a part of the plurality of mobile terminals, the movement status including at least one of the latest movement speed and the latest staying time length of the mobile terminal. The movement status acquisition unit to be acquired and
At least one of the following, based on the movement status acquired for each of the two or more mobile terminals.
(A) For each of the two or more mobile terminals, controlling the issuance of a request to a control station or a data server by the mobile terminal, and
(B) Controlling information distribution by at least the connected data server,
With the communication control unit
Equipped with
For each of the two or more mobile terminals, the movement status of the mobile terminal includes both the latest moving speed and the latest staying time of the mobile terminal.
For each of the two or more mobile terminals, the communication control unit weights each of the moving speed and the staying time length based on the balance between the moving speed and the staying time length of the mobile terminal in the latest fixed period. Determine and perform at least one of (A) and (B) based on each determined weight of travel speed and length of stay.
Control station. (X) Each computer is an autonomous mobility system, performs autonomous control based on information distributed from the connected data server of one or more data servers, and communicates via one or more wireless base stations. For each of two or more mobile terminals that are at least a part of a plurality of mobile terminals, the movement status including at least one of the latest movement speed and the latest staying time length of the mobile terminal is acquired. death,
(Y) At least one of the following, based on the movement status acquired by the computer for each of the two or more mobile terminals.
(A) For each of the two or more mobile terminals, controlling the issuance of a request to a control station or a data server by the mobile terminal, and
(B) Controlling information distribution by at least the connected data server,
And
The control of (B) is
Determining the delivery order to the two or more mobile terminals, and
Accessing at least the connected data server so that information is delivered in the determined delivery order.
Including
For each of the two or more mobile terminals, the movement status of the mobile terminal includes both the latest moving speed and the latest staying time of the mobile terminal.
In the determined delivery order,
The faster the movement speed, the faster the order of delivery tends to be.
The longer the stay, the later the delivery order tends to be.
For each of the two or more mobile terminals, the latest moving speed and the latest staying time length of the mobile terminal are values measured by the moving status acquisition unit.
In (Y), for each of the two or more mobile terminals, the weights of the moving speed and the staying time are calculated based on the balance between the moving speed and the staying time of the mobile terminal in the latest fixed period. Determine and perform both (A) and (B) based on each determined weight of travel speed and length of stay.
Control method. (X) Each computer is an autonomous mobility system, performs autonomous control based on information distributed from the connected data server of one or more data servers, and communicates via one or more wireless base stations. For each of two or more mobile terminals that are at least a part of a plurality of mobile terminals, the movement status including at least one of the latest movement speed and the latest staying time length of the mobile terminal is acquired. death,
(Y) At least one of the following, based on the movement status acquired by the computer for each of the two or more mobile terminals.
(A) For each of the two or more mobile terminals, controlling the issuance of a request to a control station or a data server by the mobile terminal, and
(B) Controlling information distribution by at least the connected data server,
And
For each of the two or more mobile terminals, the movement status of the mobile terminal includes both the latest moving speed and the latest staying time of the mobile terminal.
In (Y), for each of the two or more mobile terminals, the weights of the moving speed and the staying time are calculated based on the balance between the moving speed and the staying time of the mobile terminal in the latest fixed period. Determine and perform at least one of (A) and (B) based on each determined weight of travel speed and length of stay.
Control method. Each is an autonomous mobility system, and is a plurality of mobile terminals that perform autonomous control based on information distributed from the connected data server of one or more data servers and communicate via one or more wireless base stations. For each of the two or more mobile terminals that are at least a part, the movement status including at least one of the latest movement speed and the latest staying time length of the mobile terminal is acquired.
At least one of the following, based on the movement status acquired for each of the two or more mobile terminals.
(A) For each of the two or more mobile terminals, controlling the issuance of a request to a control station or a data server by the mobile terminal, and
(B) Controlling information distribution by at least the connected data server,
I do,
Let the calculator do that,
The control of (B) is
Determining the delivery order to the two or more mobile terminals, and
Accessing at least the connected data server so that information is delivered in the determined delivery order.
Including
For each of the two or more mobile terminals, the movement status of the mobile terminal includes both the latest moving speed and the latest staying time of the mobile terminal.
In the determined delivery order,
The faster the movement speed, the faster the order of delivery tends to be.
The longer the stay, the later the delivery order tends to be.
For each of the two or more mobile terminals, the latest moving speed and the latest staying time length of the mobile terminal are values measured by the moving status acquisition unit.
In (Y), for each of the two or more mobile terminals, the weights of the moving speed and the staying time are calculated based on the balance between the moving speed and the staying time of the mobile terminal in the latest fixed period. Determine and perform both (A) and (B) based on each determined weight of travel speed and length of stay.
A computer program that lets a calculator do things. (X) Each is an autonomous mobility system, and multiple movements that perform autonomous control based on information distributed from the connected data server of one or more data servers and communicate via one or more wireless base stations. For each of the two or more mobile terminals that are at least a part of the body terminal, the movement status including at least one of the latest movement speed and the latest staying time length of the mobile terminal is acquired.
(Y) At least one of the following, based on the movement status acquired for each of the two or more mobile terminals.
(A) For each of the two or more mobile terminals, controlling the issuance of a request to a control station or a data server by the mobile terminal, and
(B) Controlling information distribution by at least the connected data server,
I do,
Let the calculator do that,
For each of the two or more mobile terminals, the movement status of the mobile terminal includes both the latest moving speed and the latest staying time of the mobile terminal.
In (Y), for each of the two or more mobile terminals, the weights of the moving speed and the staying time are calculated based on the balance between the moving speed and the staying time of the mobile terminal in the latest fixed period. Determine and perform at least one of (A) and (B) based on each determined weight of travel speed and length of stay.
A computer program that runs a computer.

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