JP2006191340A - Radio communications system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit corrected content to a mobile station efficiently, without retransmitting the corrected content between a base station and the mobile station. <P>SOLUTION: Program operation is changed in a radio communications system. The communication system comprises the mobile station which consists of a storage for storing a program, a control unit for executing the program, and a communication section having communication functions; and the base station which consists of a communication section for communicating with the mobile station, a storage for storing the correction information for correcting the program in advance, and an electric field measurement section for measuring the electric field strength of a receiving signal. In the method, the electric field strength of an incoming signal is measured by the electric field measuring section in the base station, when the base station receives the incoming signal from the mobile station, correction information is transmitted to the mobile station by the communication section in the base station, when the electric field strength of the measured incoming signal is at least a first threshold; and the program stored in the storage in the mobile station is changed, based on the correction information received from the communication section in the mobile station, by the control section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a communication system that performs data communication between a base station and a mobile station and rewrites a program and setting contents of the mobile station.

In a radio communication system that performs data communication between a base station and a plurality of mobile stations, the mobile station radio sets control parameters and settings (parameters) that determine the operation of the mobile station radio when executing the control program. Operates according to The control program is stored in a rewritable nonvolatile memory such as an EEPROM (Electronically Erasable and Programmable Read Only Memory).

  When a problem is found in this program or setting contents and the program or setting contents are changed, a cable is connected to each mobile station radio unit, and the program and the setting contents after the change are corrected (collectively It is necessary to rewrite the contents of the memory. For this reason, when the number of mobile stations is very large, a large number of man-hours are required for the program change operation.

In order to avoid such a problem, for example, a method of changing the program of the mobile station at a time by transmitting correction contents from the base station to the mobile station by radio can be considered. According to Patent Document 1, a calling method for making a call when a received electric field strength at a mobile station is equal to or higher than a predetermined value is proposed, and even if the mobile station is in a communication range, it interferes with data communication. Therefore, the call is not made and the reliability of data communication is increased. In addition, Patent Documents 2 and 3 are known as conventional techniques related to a wireless communication system.
JP-A-5-167529 JP 2003-209508 A JP 11-33234 A

  Even if correction content is transmitted to a mobile station with poor radio wave reception status, communication may be disconnected during transmission, and data is retransmitted until the mobile station receives complete correction content. For this reason, in the prior art, there are problems that it takes a long time to rewrite the control program in which the defect is corrected, or that the rewriting of the control program cannot be completed normally. Further, even if the calling method of Patent Document 1 is adopted, when the correction content is transmitted from the base station to the mobile station, data retransmission occurs, and it still takes a long time to change the control program. is there.

  In addition, when data is retransmitted, traffic on the communication network increases, resulting in a problem that the normal business using the wireless communication system is hindered. In addition, when the normal business cannot be stopped just for correcting the defect, the defect may be left for a long time, which becomes a new problem.

  Accordingly, an object of the present invention is to provide a program operation changing method and a wireless communication system that can efficiently transmit correction contents to the mobile station without causing retransmission of the correction contents between the base station and the mobile station. There is to do.

  According to the first aspect of the present invention, the object is to provide a mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function, and the mobile A radio comprising a communication unit that enables communication with a station, a storage unit that stores correction information for correcting the program, and an electric field measurement unit that measures the electric field strength of a received signal A program operation changing method in a communication system, wherein when the base station receives an uplink signal from the mobile station, an electric field measurement unit of the base station measures an electric field strength of the uplink signal, and the measured When the electric field strength of the uplink signal is equal to or higher than a first threshold, the correction information is transmitted to the mobile station by the communication unit of the base station, and is received by the communication unit of the mobile station by the control unit. Based on distribution is achieved by providing a program operation changing method and changing the program stored in the storage unit of the mobile station.

  According to a more preferred embodiment of the above aspect of the present invention, there are a plurality of the mobile stations, and the correction information is transmitted in order from the mobile station in which the field strength of the measured uplink signal is large by the communication unit of the base station. To do. According to a more preferred embodiment of the above aspect of the invention, the mobile station further includes an electric field measuring unit that measures the electric field strength of the received signal, and the mobile station receives the downlink signal from the base station. When the electric field measuring unit of the mobile station measures the electric field strength of the downlink signal, the communication unit of the mobile station transmits the electric field strength of the measured downlink signal to the base station, and the measured When the electric field strength of the uplink signal is equal to or higher than the first threshold value and when the measured electric field strength of the downlink signal is equal to or higher than the second threshold value, the correction information is obtained by the communication unit of the base station. Transmit to the mobile station.

  In addition, according to the second aspect of the present invention, the above object is a mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function, A program operation changing method in a wireless communication system comprising a communication unit that enables communication with the mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance. When the base station transmits a downlink signal to the mobile station and the mobile station transmits an uplink signal in response to the received downlink signal, the base station transmits a predetermined time after transmitting the downlink signal. The number of occurrences of an event in which the base station receives the uplink signal, or the occurrence number of events in which the base station does not receive the uplink signal within a predetermined time after the base station transmits the downlink signal. Is stored in the base station, and the correction information is transmitted to the mobile station by the communication unit of the base station according to whether the number of occurrences within a predetermined period exceeds a predetermined threshold. By providing the program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. Achieved.

  According to a more preferred embodiment of the above aspect of the invention, there are a plurality of the mobile stations, and the correction information is transferred to the plurality of mobile stations in an order determined by the communication unit of the base station based on the number of occurrences. Sent.

According to the third aspect of the present invention, the object is a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position for detecting a current position. A wireless communication system comprising: a mobile station including a detection unit; a communication unit that enables communication with the mobile station; and a base station that includes a storage unit in which correction information for correcting the program is stored in advance. In the program operation changing method, the position detection unit acquires position information for specifying a current position of the mobile station, and includes the position information for the base station every time the mobile station moves a predetermined distance. When transmitting an uplink signal, based on the position information included in the uplink signal received by the base station, the distance traveled by the mobile station while the base station receives the uplink signal And the base station stores either the number of times the calculated distance matches the predetermined distance or the number of times the calculated distance does not match the predetermined distance, The correction information transmitted to the mobile station by the communication unit of the base station and received by the communication unit of the mobile station by the control unit according to whether or not the number of times exceeds a predetermined threshold This is achieved by providing a program operation changing method that changes the program stored in the storage unit of the mobile station.

  According to a more preferred embodiment of the above aspect of the invention, there are a plurality of the mobile stations, and the correction information is transmitted to the plurality of mobile stations in an order determined based on the number of times by a communication unit of the base station. Is done.

  According to the fourth aspect of the present invention, the object is to provide a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position for detecting a current position. A mobile station including a detection unit, a communication unit that enables communication with the mobile station, correction information for correcting the program, and reception sensitivity information at a location where the mobile station is located are stored in advance. A program operation changing method in a wireless communication system comprising a base station comprising a storage unit, wherein when the location information specifying a destination is stored in the storage unit of the mobile station, the location detection unit causes the movement Obtaining location information specifying the current location of the station, transmitting an uplink signal including location information specifying the destination and the current location to the base station by the communication unit of the mobile station, and receiving sensitivity When it is determined that the reception sensitivity of the destination and the current position is good based on the information, the base station communication unit transmits the correction information to the mobile station, and the control unit transmits the correction information to the mobile station. This is achieved by providing a program operation changing method that changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit.

  According to the fifth aspect of the present invention, the object is to provide a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position for detecting a current position. A mobile station including a detection unit, a communication unit that enables communication with the mobile station, correction information for correcting the program, and reception sensitivity information at a location where the mobile station is located are stored in advance. A program operation changing method in a radio communication system comprising a base station comprising a storage unit, wherein a downlink signal including position information for specifying a destination is transmitted to the mobile station by the communication unit of the base station. When the mobile station receives the downlink signal, the position detection unit acquires position information specifying the current position of the mobile station, and the mobile station communication unit receives the position information received by the mobile station. When the base station transmits an uplink signal including position information for identifying the current position in response to a signal, and based on the reception sensitivity information, it is determined that both the destination and the current position have good reception sensitivity, the base station The communication unit transmits the correction information to the mobile station, and the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. This is achieved by providing a program operation changing method characterized by:

  According to a more preferable embodiment in the first to fifth aspects, the base station further includes an azimuth acquiring unit that acquires a moving direction of the mobile station, and the moving direction of the mobile station is in the base station. When the direction is approaching, the correction information is transmitted to the mobile station by the communication unit of the base station. According to a more preferable embodiment in the first to fifth aspects, the base station further includes a speed acquisition unit that acquires a moving speed of the mobile station, and the moving speed of the mobile station is equal to or less than a predetermined threshold value. If so, the correction information is transmitted to the mobile station by the communication unit of the base station. According to a more preferred embodiment in the first to fifth aspects, there are a plurality of the mobile stations, and in the storage unit of the base station, mobile stations in standby state before operation are further registered in order. When a registration table is stored, the mobile station is in a standby state, and the rank of the mobile station is lower than a predetermined level, the correction information is transmitted to the mobile station by the communication unit of the base station.

  According to a sixth aspect of the present invention, there is provided the storage unit storing the program, the control unit capable of executing the program, the communication unit having a communication function, and the electric field strength of the received signal. A mobile station including an electric field measuring unit to measure, a communication unit that enables communication with the mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance. A program operation changing method in a wireless communication system, wherein when the mobile station receives a downlink signal from the base station, the electric field measurement unit of the mobile station measures the electric field strength of the downlink signal, and the measured When the field strength of the downlink signal is equal to or greater than a predetermined threshold, the communication unit of the mobile station transmits an uplink signal including a correction information acquisition request to the base station, and receives the uplink signal, The communication unit transmits the correction information to the mobile station, and the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. This is achieved by providing a program operation changing method characterized by:

  According to a seventh aspect of the present invention, the above object is a mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function, A program operation changing method in a radio communication system comprising a communication unit that enables communication with a mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance. When a base station transmits a downlink signal to the mobile station, and the mobile station transmits an uplink signal in response to the received downlink signal, the mobile station receives the downlink signal within a predetermined time. The number of occurrences of an event in which the mobile station receives the downlink signal again, or an event in which the mobile station does not receive the downlink signal again within a predetermined time after the mobile station receives the downlink signal. The mobile station stores one of the occurrence counts of the event, and includes a correction information acquisition request by the communication unit of the mobile station according to whether the occurrence count within a predetermined period exceeds a predetermined threshold. When transmitting an uplink signal to the base station and receiving the uplink signal, the base station communication unit transmits the correction information to the mobile station, and the control unit receives the correction signal from the mobile station communication unit. This is achieved by providing a program operation changing method that changes the program stored in the storage unit of the mobile station based on the correction information.

  According to an eighth aspect of the present invention, the object is a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position for detecting a current position. A mobile station including a detection unit, a communication unit that enables communication with the mobile station, correction information for correcting the program, and reception sensitivity information at a location where the mobile station is located are stored in advance. A program operation change method in a wireless communication system comprising a base station comprising a storage unit, when location information for specifying a destination is stored in the storage unit of the mobile station, by the communication unit of the mobile station, When the first uplink signal including the reception sensitivity information acquisition request is transmitted to the base station and the first uplink signal is received, the reception sensitivity information is transmitted to the mobile station by the communication unit of the base station. ,in front The position detection unit acquires position information for specifying the current position of the mobile station, and based on the reception sensitivity information received from the base station, it is determined that both the reception sensitivity of the destination and the current position is good. In this case, when the communication unit of the mobile station transmits a second uplink signal including a correction information acquisition request to the base station and receives the second uplink signal, the communication unit of the base station Information is transmitted to the mobile station, and the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station This is accomplished by providing a behavior modification method.

According to the ninth aspect of the present invention, the object is a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position for detecting a current position. A mobile station including a detection unit, a communication unit that enables communication with the mobile station, correction information for correcting the program, and reception sensitivity information at a location where the mobile station is located are stored in advance. A program operation changing method in a radio communication system comprising a base station comprising a storage unit, wherein a downlink signal including position information for specifying a destination is transmitted to the mobile station by the communication unit of the base station. When the mobile station receives the downlink signal, the communication unit of the mobile station transmits a first uplink signal including a reception sensitivity information acquisition request to the base station, and receives the first uplink signal. The reception section transmits the reception sensitivity information to the mobile station by the communication section of the base station, acquires the position information specifying the current position of the mobile station by the position detection section, and receives the reception information from the base station. When it is determined that both the destination and the current position have good reception sensitivity based on sensitivity information, the mobile station communication unit transmits a second uplink signal including a correction information acquisition request to the base station. When the second uplink signal is received, the correction information is transmitted to the mobile station by the communication unit of the base station, and based on the correction information received by the control unit by the communication unit of the mobile station This is achieved by providing a program operation changing method that changes the program stored in the storage unit of the mobile station.

  According to the tenth aspect of the present invention, the object is a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position for detecting a current position. A wireless communication system comprising: a mobile station including a detection unit; a communication unit that enables communication with the mobile station; and a base station that includes a storage unit in which correction information for correcting the program is stored in advance. In the program operation changing method, the position detection unit acquires position information for specifying a current position of the mobile station, and includes the position information for the base station every time the mobile station moves a predetermined distance. When a first uplink signal is transmitted and the base station receives the first uplink signal, a downlink signal including a reception confirmation signal and a predetermined threshold is transmitted to the mobile station by the communication unit of the base station And said When the mobile station does not receive the downlink signal within a predetermined time after transmitting the first uplink signal, the mobile station retransmits the first uplink signal and stores the number of retransmissions in the storage unit of the mobile station. When the number of retransmissions stored in the storage unit of the mobile station within a predetermined period does not exceed a predetermined threshold, the communication unit of the mobile station sends a second uplink signal including a correction information acquisition request to the base station When the base station receives the second uplink signal, the base station communication unit transmits the correction information to the mobile station, and the control unit transmits the correction information to the mobile station communication unit. This is achieved by providing a program operation changing method that changes the program stored in the storage unit of the mobile station based on the received correction information.

  According to the eleventh aspect of the present invention, the object is a mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function, A base station comprising a communication unit that enables communication with the mobile station, a storage unit that stores correction information for correcting the program, and an electric field measurement unit that measures the electric field strength of a received signal. And the electric field measurement unit of the base station measures the electric field strength of the uplink signal when the base station receives the uplink signal from the mobile station, and the communication unit of the base station performs the measurement When the electric field strength of the uplink signal is greater than or equal to a first threshold, the correction information is transmitted to the mobile station, and the control unit is configured to transmit the correction information to the mobile station based on the correction information received by the communication unit of the mobile station. Change the program stored in the storage unit. It is achieved by providing a wireless communication system, characterized by.

According to the present invention, it is determined whether a communication state between a base station and a mobile station is good, and transmission of correction contents from the base station is targeted for a mobile station that can be judged that the communication state is good from the electric field strength or the position information of the mobile station. By performing the above, it is possible to reliably carry out the change work to the control program in which the defect is corrected and the changed setting contents. Furthermore, it is determined how long the communication state that was determined to be good at the time of the determination, and the mobile stations that are more likely to maintain the good communication state are selected, thereby increasing the certainty of transmission of the correction contents. This can shorten the time required for the change work.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited to such embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1 is a configuration example of a wireless communication system according to an embodiment of the present invention. The contents of correction stored in the base station 10 (the control program in which the defect is corrected and the parameter value for determining the operation of the mobile station 20 in executing the control program) are transmitted to the mobile station 20, and the mobile station 20 It is a radio | wireless communications system for reflecting the correction content transmitted.

  An example of the wireless communication system is a vehicle allocation system such as a taxi. In that case, the base station 10 is realized as a terminal installed in the dispatch center, and the mobile station 20 is realized as an in-vehicle terminal mounted in each taxi. Although one mobile station 20 is depicted in FIG. 1, there are usually a plurality of mobile stations 20 for one base station 10. The communication range from the base station is, for example, about a radius of 5 kilometers.

  The radio communication system according to the present embodiment targets a mobile station 20 that determines whether the communication state between the base station 10 and the mobile station 20 is good and can determine that the communication state is good from the electric field strength and the position information of the mobile station 20. By transmitting the correction contents from the base station 10, the mobile station 20 efficiently and surely implements the control program in which the defect is corrected and the change work to the changed setting contents. Furthermore, the reliability of communication is further increased by determining how long the communication state determined to be good at the time of determination lasts and selecting the mobile stations 20 that are more likely to maintain the good communication state. Can do.

  The base station 10 includes a control unit 11, a RAM (Random Access Memory) 12, a storage unit 13, and a communication unit 14 having a communication function that are connected to each other via a signal line 15.

The control unit 11 includes a CPU (Central Processing Unit) (not shown), executes a control program stored in the RAM 12, and controls each unit included in the base station 10. The RAM 12 is a storage means for temporarily storing calculation results and programs in the processing of the base station 10. The storage unit 13 is a nonvolatile storage unit such as a hard disk, and stores various data and a control program before being read to the RAM 12.

The communication unit 14 is a wireless device that enables communication with the mobile station 20. The communication unit 14 receives information from the mobile station 20 by transmitting and receiving wireless radio waves via the antenna 16, and corrects the contents to the mobile station 20. Send. The communication unit 14 also functions as an electric field measurement unit that measures the electric field strength of the received signal. The received electric field strength is, for example, AGC (Automatic Gain Control) in the communication unit 14.
Measured based on voltage.

The mobile station 20 includes a control unit 21, a RAM 22, and a memory (NonVolatile MEMory, hereinafter referred to as NV-MEM) 23, which are connected to each other via a signal line 27, and also a nonvolatile storage unit. A flash memory (hereinafter referred to as F-MEM) 24, a sensor signal processing unit 25, and a communication unit 26 having a communication function are included.

The control unit 21 includes a CPU (not shown), executes a control program stored in the RAM 22, and controls each unit included in the mobile station 20. The RAM 22 is a storage means for temporarily storing calculation results and programs in the processing of the mobile station 20.

  Since the NV-MEM 23 is a non-volatile storage means, the stored content is retained even when the mobile station 20 is turned off. The NV-MEM 23 is used to store the correction content transmitted from the base station 10. The As will be described later in the activation process (FIG. 2), the correction content stored in the NV-MEM 23 is reflected at the next activation of the mobile station 20.

  The F-MEM 24 stores various data and a control program before being read out to the RAM 22. The sensor signal processing unit 25 processes signals from various sensors and gives them to the control unit 21. Various sensors include a GPS (Global Positioning System) sensor for measuring the current position of the mobile station 20, a distance sensor that calculates a travel distance based on a vehicle speed pulse generated according to the number of rotations of the wheel, and a traveling direction. A gyro sensor, a speed sensor that detects the moving speed of the mobile station 20, a destination setting sensor that detects that a destination has been set in the navigation device, and the like are included.

  The communication unit 26 is a wireless device that enables communication with the base station 10. The communication unit 26 transmits and receives wireless radio waves via the antenna 28, receives correction contents from the base station 10, and transmits information to the base station 10. Send. The communication unit 26 also functions as an electric field measuring unit that measures the electric field strength of the received signal, like the base station.

  Thus, according to the present wireless communication system, the contents of correction stored in the base station 10 (such as the control program in which the defect is corrected and the parameter value that determines the operation of the mobile station 20 when executing the control program) are moved. The correction contents transmitted to the station 20 and reflected by the mobile station 20 can be reflected.

  FIG. 2 is a flowchart for explaining the activation process of the mobile station 20 for explaining how the correction contents transmitted from the base station 10 are reflected. When the power of the mobile station 20 is turned on, the control unit 21 reads the control program stored in the F-MEM 24 and develops it in the RAM 22 (S1).

And the control part 21 confirms whether the correction content is stored in NV-MEM23 (S2). If correction contents are stored (S2 Yes), the control unit 21 stores the correction contents in the RAM 22
(S3). If the correction content is a program for correcting a problem, the control unit 21 changes the control program that has been expanded in the RAM 22 with the control program stored in the NV-MEM 23. If the correction content is a parameter value, the parameter value developed in the RAM 22 is replaced with the parameter value stored in the NV-MEM 23.

While the mobile station 20 is in operation, the mobile station 2 follows the control program developed in the RAM 22.
Since 0 operates, even if the F-MEM 24 is rewritten, the operation of the mobile station 20 is not hindered. Therefore, the control unit 21 writes the correction content stored in the NV-MEM 23 into the F-MEM 24 (S4). Then, from the next start-up, the control program for which the defect has been solved stored in the F-MEM 24 is directly developed in the RAM 22.

When the correction content is not stored in the NV-RAM 23 in step S2 (S2 No), or when the reflection of the correction content to the F-MEM 24 is completed in step S4, the control unit 2
1 starts control of the mobile station 20 by executing a control program developed in the RAM 22.

[Operation example of wireless communication system]
FIG. 3 is a flowchart for explaining an example of the operation of the wireless communication system according to the present embodiment.
First, reception state determination processing for determining whether the communication state between the base station 10 and the mobile station 20 is good is performed (S10). In step S10, the mobile station 20 that can determine that the communication state is good is selected based on the electric field strength, the position information of the mobile station 20, and the like.

  Then, the base station 10 transmits the correction contents to the selected mobile station 20 (S30). The mobile station 20 stores the correction content transmitted from the base station 10 in the NV-MEM 23 (S40). As described with reference to FIG. 2, the correction content stored in the NV-MEM 23 is reflected at the next start-up of the mobile station 20, and the change operation is completed.

  Accordingly, the mode of the goodness determination process (S10) will be described below. The reception state goodness determination process can be performed by the base station 10 or the mobile station 20. First, the case where it performs in the base station 10 is demonstrated.

[First mode of good judgment performed by base station]
FIG. 4 is a flowchart showing a first mode of goodness determination performed at the base station. Usually, in a vehicle allocation system, it is necessary to always grasp the current position of a mobile station, but here the mobile station 20 arbitrarily transmits the current position to the base station 10 every time it moves a predetermined distance. The base station 10 determines whether to transmit the correction content to the mobile station 20 according to the received electric field strength at that time.

  First, the mobile station 20 always determines whether it has moved a predetermined distance (S101). This can be determined by the control unit 21 of the mobile station 20 acquiring a signal from the distance sensor via the sensor signal processing unit 25.

When it is determined that the mobile station 20 has moved a predetermined distance (S101 Yes), the mobile station controller 21 transmits mobile station data via the communication unit 26 (S102). The mobile station data includes an identifier (ID) for identifying the mobile station 20 and position information (for example, latitude and longitude) of the current position acquired via the GPS sensor.

  The base station 10 always waits for reception of mobile station data from the mobile station 20 (S103). When the mobile station data is received (S103 Yes), the control unit 11 of the base station measures the electric field strength of the received signal via the electric field measurement unit 14 (S104). In this specification, a signal transmitted from the mobile station 20 to the base station 10 is referred to as an uplink signal.

  Then, the control unit 11 of the base station compares a predetermined threshold stored in advance in the storage unit 13 of the base station with the electric field strength of the uplink signal measured in step S104 (S105). If it is equal to or greater than the threshold value (S105 Yes), the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the base station 10 stores the storage unit for the mobile station 20 corresponding to the ID acquired in step S103. 13 is transmitted (S30 in FIG. 3).

  When the reception of mobile station data cannot be confirmed (S103 No), or when the electric field strength of the uplink signal is less than the threshold (S105 No), the base station 10 stands by until the next mobile station data is received.

[Second mode of good judgment performed by base station]
FIG. 5 is a flowchart showing a second mode of goodness determination performed at the base station. Here, in order to grasp the current position of the mobile station, the base station 10 periodically polls the mobile station 20 and makes the current position of the mobile station 20 respond to the polling signal. The base station 10 determines whether to transmit the correction content to the mobile station 20 according to the received electric field strength at that time.

First, the control unit 11 of the base station periodically transmits a mobile station data acquisition request via the communication unit 14 (S106). The mobile station 20 always waits for reception of a mobile station data acquisition request from the base station 10 (S107). When receiving the mobile station data acquisition request (Yes in S107), the control unit 21 of the mobile station measures the electric field strength of the received signal via the electric field measurement unit 26 (S108). In the present specification, a signal transmitted from the base station 10 to the mobile station 20 is referred to as a downlink signal.

And the control part 21 of a mobile station transmits mobile station data via the communication part 26 (S109). The mobile station data in step S109 includes an identifier (ID) for identifying the mobile station 20, position information (for example, latitude and longitude) of the current position acquired via the GPS sensor, and step S109.
The field strength of the downstream signal measured at 108 is included.

  The base station 10 always waits for reception of mobile station data from the mobile station 20 (S103). When receiving the mobile station data (S103 Yes), the control unit 11 of the base station measures the electric field strength of the uplink signal via the electric field measurement unit 14 (S104). Then, the control unit 11 of the base station compares the first threshold value for the uplink signal stored in advance in the storage unit 13 of the base station with the electric field strength of the uplink signal measured in step S104 (S105). .

  If it is equal to or greater than the first threshold (S105 Yes), the control unit 11 of the base station stores the second threshold for downlink signals stored in advance in the storage unit 13 of the base station and the uplink signal acquired in step S103. Are compared with the electric field strength (S112). If it is equal to or greater than the second threshold value (S112 Yes), the process proceeds to the subsequent process. For example, in the case of FIG. 3, the base station 10 sends the mobile station 20 corresponding to the ID acquired in step S103. Then, the correction content stored in the storage unit 13 is transmitted (S30 in FIG. 3).

  In step S103, if reception of mobile station data cannot be confirmed (S103 No), and if it is less than the threshold value in steps S105 and S112 (S105 No, S112 No), the base station 10 transmits the next mobile station data acquisition request. Wait until the timing.

  As described above, according to the first and second aspects, by measuring the electric field strength of the uplink signal transmitted from the mobile station 20 and / or the downlink electric field strength received by the mobile station 20, the base station 10 can It is possible to select a mobile station 20 that can obtain a sufficient electric field strength for changing the content (parameter value), and transmit the correction content only to the selected mobile station 20.

[Third aspect of good judgment performed by base station]
FIG. 6 is a flowchart showing a third mode of the goodness determination performed at the base station. Here, the frequency | count that the base station 10 received the mobile station data normally is memorize | stored with respect to the polling which the base station 10 performs with respect to the mobile station 20 regularly. The base station 10 determines whether to transmit the correction content to the mobile station 20 according to the number of receptions.

First, the control unit 11 of the base station periodically transmits a mobile station data acquisition request via the communication unit 14 (S106). The mobile station 20 always waits for reception of a mobile station data acquisition request from the base station 10 (S107). When receiving the mobile station data acquisition request (Yes at S107), the mobile station control unit 21 transmits the mobile station data via the communication unit 26 (S102). The mobile station data in step S102 includes an identifier (ID) for identifying the mobile station 20 and position information (for example, latitude and longitude) of the current position acquired via the GPS sensor.

The base station 10 always waits for reception of mobile station data from the mobile station 20 (S103). When receiving the mobile station data (Yes in S103), the control unit 11 of the base station increases the frequency of reception by 1 and stores it in the storage unit 13 of the base station (S113). The number of receptions counted in this way becomes a large value if the radio wave condition between the mobile station 20 and the base station 10 is good. Thus, the communication state can be determined.

  Then, the control unit 11 of the base station compares a predetermined threshold value stored in advance in the storage unit 13 of the base station with the number of receptions in a predetermined period (for example, between the present and 10 minutes before) (S114). . If it is equal to or greater than the threshold (S114 Yes), the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the storage unit stores the mobile station 20 corresponding to the ID acquired in step S103 from the base station 10. 13 is transmitted (S30 in FIG. 3).

  When the number of receptions is less than the threshold (No in S114), the base station 10 waits until the next mobile station data acquisition request transmission timing. If reception of mobile station data cannot be confirmed (No at S103), step S113 is skipped.

[Fourth aspect of good judgment performed by base station]
FIG. 7 is a flowchart showing a fourth mode of the goodness determination performed at the base station. Here, the number of times the base station 10 has normally received the mobile station data is stored for an arbitrary transmission of the current position performed by the mobile station 20 to the base station 10. The base station 10 determines whether to transmit the correction content to the mobile station 20 according to the number of receptions.

  First, the mobile station 20 always determines whether it has moved a predetermined distance (S101). This can be determined by the control unit 21 of the mobile station 20 acquiring a signal from the distance sensor via the sensor signal processing unit 25.

When it is determined that the mobile station 20 has moved a predetermined distance (S101 Yes), the mobile station controller 21 transmits mobile station data via the communication unit 26 (S102). The mobile station data includes an identifier (ID) for identifying the mobile station 20 and position information (for example, latitude and longitude) of the current position acquired via the GPS sensor.

  The base station 10 always waits for reception of mobile station data from the mobile station 20 (S103). When receiving the mobile station data (Yes in S103), the control unit 11 of the base station calculates the moving distance of the mobile station based on the position information (S115). For example, based on the latitude and longitude information, the distance between the point specified by the position information included in the previously received mobile station data and the point specified by the position information included in the mobile station data received this time is obtained.

  And the control part 11 of a base station determines whether the moving distance calculated by step S115 corresponds with the predetermined distance corresponding to arbitrary transmission (S116). If they match (Yes in S116), the mobile station data is normally received, so the control unit 11 of the base station increases the frequency of reception by 1 and stores it in the storage unit 13 of the base station ( S113).

  If the two do not match, for example, an arbitrary call is made every 200 meters. However, if the travel distance calculated from the information received by the base station 10 is 400 meters, the mobile station 20 is the point where the vehicle has advanced 200 meters. It is not accepted as normal reception because the radio wave condition is considered bad. In general, when the radio wave condition between the mobile station 20 and the base station 10 is poor, the reception interval at the base station 10 becomes long, so that the communication state can be determined.

  Then, the control unit 11 of the base station compares a predetermined threshold value stored in advance in the storage unit 13 of the base station with the number of receptions in a predetermined period (for example, between the present and 10 minutes before) (S114). . If it is equal to or greater than the threshold (S114 Yes), the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the storage unit stores the mobile station 20 corresponding to the ID acquired in step S103 from the base station 10. 13 is transmitted (S30 in FIG. 3).

  When the number of receptions is less than the threshold (No in S114), the base station 10 waits until reception of the next mobile station data. Further, when the reception of mobile station data cannot be confirmed (No in S103), or when the calculated moving distance does not match the predetermined distance for arbitrary transmission (S116 No), steps S113 and S115 are skipped.

  In FIG. 7, the movement distance is calculated by the base station 10 based on the position information included in the mobile station data, but from the distance sensor input via the sensor signal processing unit 25 of the mobile station 20. Based on the signal, the moving distance calculated by the control unit 21 of the mobile station can be included in the mobile station data. In this case, the control unit 21 of the base station can complete step S115 simply by extracting the movement distance from the received mobile station data, and can perform the comparison process of step S116 as it is.

[Fifth aspect of good judgment performed by base station]
FIG. 8 is a flowchart showing a fifth mode of the goodness determination performed at the base station. In the third mode of the good judgment performed by the base station, the base station stores the number of times mobile station data has been successfully received for polling, but the number of times the mobile station data has not been successfully received, that is, the number of reception failures. The base station 10 may determine whether to store the correction contents to the mobile station 20 according to the number of failures.

  First, the control unit 11 of the base station periodically transmits a mobile station data acquisition request via the communication unit 14 (S106). The mobile station 20 always waits for reception of a mobile station data acquisition request from the base station 10 (S107).

When receiving the mobile station data acquisition request (Yes at S107), the mobile station control unit 21 transmits the mobile station data via the communication unit 26 (S102). The mobile station data in step S102 includes an identifier (ID) for identifying the mobile station 20 and position information (for example, latitude and longitude) of the current position acquired via the GPS sensor.

  The base station 10 always waits for reception of mobile station data from the mobile station 20 (S103). When the control unit 11 of the base station cannot confirm the reception of the mobile station data even after a predetermined time has elapsed from the transmission of the mobile station data acquisition request (No in S103), the base station control unit 11 determines that the reception of the mobile station data has failed and the number of retransmissions Is incremented by 1 and stored in the storage unit 13 of the base station, and the mobile station data acquisition request is retransmitted (S117). The number of retransmissions counted in this way becomes a small value if the radio wave condition between the mobile station 20 and the base station 10 is good. Thus, the communication state can be determined.

  Then, the control unit 11 of the base station compares a predetermined threshold stored in advance in the storage unit 13 of the base station with the number of retransmissions in a predetermined period (for example, between the present and 10 minutes before) (S118). . If it is equal to or lower than the threshold (Yes in S118), the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the storage unit stores the mobile station 20 corresponding to the ID acquired in step S103 from the base station 10. 13 is transmitted (S30 in FIG. 3).

  When the number of retransmissions exceeds the threshold (No in S118), the base station 10 stands by until the next mobile station data acquisition request transmission timing. If reception of mobile station data has been confirmed (S103 Yes), step S117 is skipped.

[Sixth aspect of good judgment performed by base station]
FIG. 9 is a flowchart showing a sixth mode of the goodness determination performed at the base station. In the fourth mode of good judgment performed by the base station, the base station stores the number of times the mobile station data has been successfully received for an arbitrary transmission from the mobile station, but has not been successfully received. May be stored, and the base station 10 may determine whether to transmit the correction content to the mobile station 20 according to the number of failures.

  First, the mobile station 20 always determines whether it has moved a predetermined distance (S101). This can be determined by the control unit 21 of the mobile station 20 acquiring a signal from the distance sensor via the sensor signal processing unit 25.

When it is determined that the mobile station 20 has moved a predetermined distance (S101 Yes), the mobile station controller 21 transmits mobile station data via the communication unit 26 (S102). The mobile station data includes an identifier (ID) for identifying the mobile station 20 and position information (for example, latitude and longitude) of the current position acquired via the GPS sensor.

  The base station 10 always waits for reception of mobile station data from the mobile station 20 (S103). When receiving the mobile station data (Yes in S103), the control unit 11 of the base station calculates the moving distance of the mobile station based on the position information (S115). For example, based on the latitude and longitude information, the distance between the point specified by the position information included in the previously received mobile station data and the point specified by the position information included in the mobile station data received this time is obtained.

  And the control part 11 of a base station determines whether the moving distance calculated by step S115 corresponds with the predetermined distance corresponding to arbitrary transmission (S116). If they do not match (No in S116), it is determined that reception of mobile station data has failed, and the control unit 11 of the base station increases the frequency of retransmissions by 1 and stores it in the storage unit 13 of the base station (S117). Since retransmission here means retransmission of mobile station data performed by the mobile station 20, the base station 10 does not particularly perform retransmission processing. The number of retransmissions counted in this way becomes a small value if the radio wave condition between the mobile station 20 and the base station 10 is good. Thus, the communication state can be determined.

  Then, the control unit 11 of the base station compares a predetermined threshold stored in advance in the storage unit 13 of the base station with the number of retransmissions in a predetermined period (for example, between the present and 10 minutes before) (S118). . If it is equal to or lower than the threshold (Yes in S118), the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the storage unit stores the mobile station 20 corresponding to the ID acquired in step S103 from the base station 10. 13 is transmitted (S30 in FIG. 3).

  When the number of retransmissions exceeds the threshold (No in S118), or when the calculated moving distance matches the predetermined distance for arbitrary transmission (Yes in S116), the base station 10 waits for reception of the next mobile station data. If reception of mobile station data cannot be confirmed (No at S103), steps S115, S116, and S117 are skipped.

  In FIG. 9, the movement distance is calculated by the base station 10 based on the position information included in the mobile station data, but from the distance sensor input via the sensor signal processing unit 25 of the mobile station 20. Based on the signal, the moving distance calculated by the control unit 21 of the mobile station can be included in the mobile station data. In this case, the control unit 21 of the base station can complete step S115 simply by extracting the movement distance from the received mobile station data, and can perform the comparison process of step S116 as it is.

As described above, according to the third to sixth aspects, in the process of collecting the position information of the mobile station 20, it is possible to determine the communication state from the reception result of the position information and the number of retransmissions. In particular, if the location information of several hundred meters is collected, the communication state of the mobile station 20 can be accurately estimated. For this reason, the base station 10 selects the mobile station 20 having a sufficiently good communication state for changing the control program and setting contents (parameter values) without measuring the electric field strength and the like, and selects the selected mobile station. The correction contents can be transmitted only to the station.

[Seventh Mode of Good Determination Performed at Base Station]
Next, the seventh aspect will be described. In the seventh aspect, when the reception sensitivity for each location is determined in advance and it is determined that both the current position of the mobile station and the communication state at the destination are good, the base station 10 Send corrections.

  FIG. 10 is a diagram illustrating a data configuration example of a reception sensitivity information table used in the seventh mode of good determination performed in the base station. The reception sensitivity table of FIG. 10 includes data items “area”, “position information”, and “field strength”, and is stored in advance in the storage unit 13 of the base station.

  “Area” is an identifier that identifies a grouping of a plurality of points. For example, an area is generated when an area on a map is divided by administrative district. Other classification methods may be used. “Position information” is latitude and longitude information that identifies a point belonging to an area.

  “Field strength” indicates the field strength at each point. The electric field strength may be a value measured in the field or a predicted value based on an empirical rule.

  When a point is specified by the position information, the communication state at the point can be estimated from the “electric field strength” stored in the table by referring to the reception sensitivity information table of FIG.

  FIG. 11 is a flowchart showing a seventh mode of the goodness determination performed at the base station. The seventh aspect shows a case where a destination is set in the mobile station 20. The case where the destination is set in the mobile station 20 is, for example, a case where the destination is input to a navigation device provided in the mobile station 20.

  First, a destination is set in the mobile station 20 (S119). The control unit 21 of the mobile station detects that the destination has been input based on a signal input from the destination setting sensor via the sensor signal processing unit 25. And the control part 21 of a mobile station acquires the present position of a mobile station via the sensor signal processing part 25 (S120).

The current position of the mobile station is obtained via a GPS sensor. Next, the control unit 21 of the mobile station
The location information of the destination and the current location is transmitted to the base station 10 together with the mobile station ID via the communication unit 26 (S121).

  The base station 10 always waits for reception of location information of the destination and current location from the mobile station 20 (S122). When receiving the position information (Yes at S122), the control unit 11 of the base station refers to the reception sensitivity information table stored in the storage unit 13 and determines whether the reception sensitivity at the current position is good (S123). The control unit 11 of the base station obtains the electric field strength at the point corresponding to the position information of the current position in the reception sensitivity information table, and compares the electric field strength with a predetermined threshold value stored in advance in the storage unit 13 of the base station. Is greater than or equal to a predetermined threshold, it is determined that the reception sensitivity is good.

When it is determined that the reception sensitivity at the current position is good (S123 Yes), the control unit 11 of the base station similarly determines whether the reception sensitivity at the destination is good (S124). When the reception sensitivity of the destination is also determined to be good (S124 Yes), the process proceeds to the subsequent process. For example, in the case of FIG. 3, the movement corresponding to the ID acquired in step S122 from the base station 10 The correction content stored in the storage unit 13 is transmitted to the station 20 (S30 in FIG. 3).
When the reception of the position information of the destination and the current position cannot be confirmed (S122 No), the reception sensitivity of the current position is not good (S123 No), and the reception sensitivity of the destination is not good (S124 No), the base station 10 Then, it waits for reception of position information of the next destination and the current position.

[Eighth mode of good judgment performed by base station]
FIG. 12 is a flowchart showing an eighth mode of goodness determination performed at the base station. In the eighth aspect, when the reception sensitivity for each location is determined in advance and it is determined that both the current position of the mobile station and the communication state at the destination are good, the base station 10 The correction content is transmitted, and the case where the base station 10 sets the destination of the mobile station 20 is shown.

  The case where the destination is set in the base station 10 is, for example, when there is a request for dispatch directly to the dispatch center and when the nearest taxi (mobile station) is directed to the requested point, it is mounted on the taxi. This is the case where a remote operation signal for displaying a map of the requested point on the navigation device is transmitted from the base station 10 to the mobile station 20.

First, the destination of the mobile station 20 is set in the base station 10 (S125). For example, the location information of the destination is included in the remote operation signal of the navigation device described above, and the location information of the destination is transmitted from the base station 10 to the mobile station 20. And the control part 21 of a mobile station acquires the present position of the mobile station 20 via the sensor signal processing part 25 (S120). The current position of the mobile station 20 is acquired via a GPS sensor. Next, the control unit 21 of the mobile station transmits the position information of the current position to the base station 10 together with the ID of the mobile station 20 via the communication unit 26 (S121).

  The base station 10 always waits for reception of position information of the current position from the mobile station 20 (S122). When receiving the position information (Yes at S122), the control unit 11 of the base station refers to the reception sensitivity information table stored in the storage unit 13 and determines whether the reception sensitivity at the current position is good (S123). The control unit 11 of the base station obtains the electric field strength at the point corresponding to the position information of the current position in the reception sensitivity information table, and compares the electric field strength with a predetermined threshold value stored in advance in the storage unit 13 of the base station. Is greater than or equal to a predetermined threshold, it is determined that the reception sensitivity is good.

When it is determined that the reception sensitivity at the current position is good (S123 Yes), the control unit 11 of the base station similarly determines whether the reception sensitivity at the destination is good (S124). If it is determined that the reception sensitivity of the destination is also good (S124 Yes), the process proceeds to the subsequent process. For example, in the case of FIG. 3, the movement corresponding to the ID acquired in step S127 from the base station 10 The correction content stored in the storage unit 13 is transmitted to the station 20 (S30 in FIG. 3).
When the reception of the position information of the destination and the current position cannot be confirmed (S122 No), the reception sensitivity of the current position is not good (S123 No), and the reception sensitivity of the destination is not good (S124 No), the base station 10 Then, it waits until reception of position information of the next current position.

  If the mobile station 20 is a place where both the current position and the destination have a good electric field, the mobile station 20 is considered to be in the vicinity of the base station 10 in many cases. For this reason, according to the seventh and eighth aspects, the base station 10 is in a communication state sufficient for changing the control program and setting contents (parameter values) without measuring the electric field strength or the like. A good mobile station 20 can be selected, and the correction content can be transmitted only to the selected mobile station.

  As described above, the processes from FIG. 4 to FIG. 12 are performed by the base station 10 to determine whether the reception state is good. However, it may take time to determine the goodness of all the mobile stations 20. . Therefore, the determination of goodness is performed in the mobile station 20, and the base station 10 reduces the load of the goodness determination process by transmitting the correction content only to the mobile station 20 that has requested transmission of the correction content. May be. Hereinafter, the case where the mobile station 20 performs reception state goodness determination processing will be described.

[First mode of good judgment performed by mobile station]
FIG. 13 is a flowchart showing a first mode of goodness determination performed by the mobile station. The mobile station 20 determines whether to request the base station 10 to transmit the correction contents according to the received electric field strength when receiving the correction request from the base station 10.

  First, the control unit 11 of the base station transmits a correction request and a threshold value used for determination of goodness via the communication unit 14 (S150). The correction request is a signal transmitted to the mobile station 20 when the base station 10 holds the correction content. The threshold value is stored in advance in the storage unit 13 of the base station.

  The mobile station 20 always waits for reception of a correction request from the base station 10 (S151). When receiving the correction request and the threshold value (S151 Yes), the control unit 21 of the mobile station measures the electric field strength of the downlink signal via the electric field measurement unit 26 (S108). And the control part 21 of a mobile station compares the threshold value received by step S150, and the electric field strength of the downlink signal measured by step S108 (S152).

  When the electric field strength of the downlink signal is equal to or greater than the threshold (Yes in S152), the mobile station control unit 21 transmits the correction content transmission request and the ID of the mobile station 20 to the base station 10 via the communication unit 26 (S153). . When the process of step S153 is completed, the process proceeds to the subsequent process. For example, in the case of FIG. 3, the base station 10 stores the storage unit for the mobile station 20 corresponding to the ID transmitted in step S153. 13 is transmitted (S30 in FIG. 3).

  Note that the mobile station 20 waits until the next correction request is received when the reception of the correction request cannot be confirmed (No in S151) or when the electric field strength of the downlink signal is less than the threshold (No in S152).

  As described above, according to the first aspect, by measuring the downlink electric field strength received by the mobile station 20, the mobile station 20 can obtain a sufficient electric field strength for changing the control program and setting contents (parameter values). Since only requests the base station 10 to transmit the correction content, the base station 10 can transmit the correction content to the limited mobile station 20.

[Second mode of good judgment performed by mobile station]
FIG. 14 is a flowchart showing a second mode of goodness determination performed by the mobile station. In response to polling performed by the base station, the mobile station 20 stores the number of times that the mobile station data is retransmitted, and the mobile station 20 determines whether to request the base station 10 to transmit correction contents according to the number of retransmissions.

  First, the control unit 11 of the base station periodically transmits a mobile station data acquisition request and a threshold used for goodness determination via the communication unit 14 (S106). The mobile station 20 always waits for reception of a mobile station data acquisition request from the base station 10 (S107).

When receiving the mobile station data acquisition request (Yes at S107), the mobile station control unit 21 transmits the mobile station data via the communication unit 26 (S102). The mobile station data in step S102 includes an identifier (ID) for identifying the mobile station 20 and position information (for example, latitude and longitude) of the current position acquired via the GPS sensor.

When the mobile station data acquisition request is received again before the predetermined time has elapsed from the transmission of the mobile station data (Yes in S154), the control unit 21 of the mobile station determines that the transmission of the mobile station data has failed, The frequency is increased by 1 and stored in the RAM 22 of the mobile station, and the mobile station data is retransmitted (S155). The number of retransmissions counted in this way becomes a small value if the radio wave condition between the mobile station 20 and the base station 10 is good. Thus, the communication state can be determined.

  Then, the control unit 21 of the mobile station compares the threshold received in step S107 with the number of retransmissions in a predetermined period (for example, from the present to 10 minutes before) (S156). If it is equal to or less than the threshold (Yes in S156), the mobile station controller 21 transmits the correction content transmission request and the ID of the mobile station 20 to the base station 10 via the communication unit 26 (S153).

  When step S153 is completed, the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the base station 10 stores the mobile station 20 corresponding to the ID transmitted in step S153 in the storage unit 13. The stored correction contents are transmitted (S30 in FIG. 3).

  When the mobile station data acquisition request cannot be confirmed (S107 No), or when the number of retransmissions exceeds the threshold (S156 No), the mobile station 20 waits until the next mobile station data acquisition request transmission timing. If the reacquisition request is not received within the predetermined time (No at S154), step S155 is skipped.

[Third aspect of good judgment performed by mobile station]
FIG. 15 is a flowchart showing a third mode of the goodness determination performed by the mobile station. The mobile station 20 stores the number of times the mobile station data is retransmitted for an arbitrary transmission performed by the mobile station, and the mobile station 20 determines whether to request the base station 10 to transmit the correction contents according to the number of retransmissions.

  First, the mobile station 20 always determines whether it has moved a predetermined distance (S101). This can be determined by the control unit 21 of the mobile station 20 acquiring a signal from the distance sensor via the sensor signal processing unit 25.

When it is determined that the mobile station 20 has moved a predetermined distance (S101 Yes), the mobile station controller 21 transmits mobile station data via the communication unit 26 (S102). The mobile station data includes an identifier (ID) for identifying the mobile station 20 and position information (for example, latitude and longitude) of the current position acquired via the GPS sensor.

The base station 10 always waits for reception of mobile station data from the mobile station 20 (S103). When receiving the mobile station data (Yes in S103), the control unit 11 of the base station determines whether the base station 10 has received the mobile station data via the communication unit 14 and an ACK signal that is a confirmation signal. The threshold value to be used is transmitted (S157).

The mobile station 20 always waits for reception of an ACK signal from the base station 10 (S158).
When the control unit 21 of the mobile station cannot confirm the reception of the ACK signal even after a predetermined time has elapsed from the transmission of the mobile station data (No in S158), the mobile station control unit 21 determines that the transmission of the mobile station data has failed and sets the frequency of retransmissions. 1 is incremented and stored in the mobile station RAM 22 and the mobile station data is retransmitted (S1).
55). The number of retransmissions counted in this way becomes a small value if the radio wave condition between the mobile station 20 and the base station 10 is good. Thus, the communication state can be determined.

  Then, the control unit 21 of the mobile station compares the threshold received in step S158 with the number of retransmissions in a predetermined period (for example, from the present to 10 minutes before) (S156). If it is equal to or less than the threshold (Yes in S156), the mobile station controller 21 transmits the correction content transmission request and the ID of the mobile station 20 to the base station 10 via the communication unit 26 (S153). When step S153 is completed, the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the base station 10 stores the mobile station 20 corresponding to the ID transmitted in step S153 in the storage unit 13. The stored correction contents are transmitted (S30 in FIG. 3).

If the number of retransmissions exceeds the threshold (No in S156), the mobile station 20 waits until the next mobile station data transmission timing. Also, when an ACK signal is received within a predetermined time (S158Y)
es), step S155 is skipped.

  As described above, according to the second and third aspects, in the process of collecting the location information of the mobile station 20, it is possible to determine the communication state from the reception result of the location information and the number of retransmissions. For this reason, only the mobile station 20 having a good communication state sufficient to change the control program and setting contents (parameter values) without measuring the electric field strength or the like requests the base station 10 to transmit the correction contents. Therefore, the base station 10 can transmit the correction content to the limited mobile station 20.

[Fourth aspect of good judgment performed by mobile station]
FIG. 16 is a flowchart showing a fourth mode of the goodness determination performed by the mobile station. In the fourth aspect, when the reception sensitivity for each location is determined in advance and it is determined that both the current position of the mobile station and the communication state at the destination are good, the mobile station 20 Request to send corrections. The destination is set in the mobile station 20.

  First, a destination is set in the mobile station 20 (S119). The control unit 21 of the mobile station detects that the destination has been input based on a signal input from the destination setting sensor via the sensor signal processing unit 25. Then, the control unit 21 of the mobile station transmits a reception sensitivity information acquisition request to the base station 10 via the communication unit 26 (S157).

  The base station 10 always waits for reception of a reception sensitivity information acquisition request from the mobile station 20 (S158). When receiving the acquisition request (Yes in S158), the control unit 11 of the base station reads out the reception sensitivity information table stored in the storage unit 13, and transmits the reception sensitivity information table stored in the storage unit 13 together with the threshold used for the goodness determination via the communication unit 14. (S159).

  On the other hand, the mobile station 20 always waits for reception of the reception sensitivity information table from the base station 10 (S160). When receiving the reception sensitivity information table (S160 Yes), the mobile station control unit 21 acquires the current position of the mobile station via the sensor signal processing unit 25 (S120). The current position of the mobile station is obtained via a GPS sensor.

  Then, the control unit 11 of the base station refers to the received reception sensitivity information table and determines whether the reception sensitivity at the current position is good (S161). The control unit 21 of the mobile station obtains the electric field strength at the point corresponding to the position information of the current position in the reception sensitivity information table, compares it with the threshold received in step S160, and if the electric field strength is equal to or greater than the threshold, It is determined that the sensitivity is good.

When it is determined that the reception sensitivity at the current position is good (S161 Yes), the mobile station controller 21 similarly determines whether the reception sensitivity at the destination is good (S162). When it is determined that the destination reception sensitivity is also good (S162 Yes), the mobile station control unit 21 transmits the correction content transmission request and the ID of the mobile station 20 to the base station 10 via the communication unit 26 (S153). ). When step S153 is completed, the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the base station 10 stores the mobile station 20 corresponding to the ID transmitted in step S153 in the storage unit 13. The stored correction contents are transmitted (S30 in FIG. 3).
If the reception sensitivity of the current position is not good (No in S161) or if the reception sensitivity of the destination is not good (No in S162), the mobile station 20 stands by until the next destination is set.

[Fifth aspect of good judgment performed by mobile station]
FIG. 17 is a flowchart showing a fifth mode of the goodness determination performed by the mobile station. In the fifth aspect, when the reception sensitivity for each location is determined in advance and both the current position of the mobile station and the communication state at the destination are determined to be good, the mobile station 20 Request to send corrections. The destination is set in the base station 10.

  First, the destination of the mobile station 20 is set in the base station 10, and position information specifying the destination is transmitted (S125). For example, the location information of the destination is included in the remote operation signal of the navigation device described above, and the location information of the destination is transmitted from the base station 10 to the mobile station 20. Then, the control unit 21 of the mobile station transmits a reception sensitivity information acquisition request to the base station 10 via the communication unit 26 (S157).

  The base station 10 always waits for reception of a reception sensitivity information acquisition request from the mobile station 20 (S158). When receiving the acquisition request (Yes in S158), the control unit 11 of the base station reads out the reception sensitivity information table stored in the storage unit 13, and transmits the reception sensitivity information table stored in the storage unit 13 together with the threshold used for the goodness determination via the communication unit 14. (S159).

  On the other hand, the mobile station 20 always waits for reception of the reception sensitivity information table from the base station 10 (S160). When receiving the reception sensitivity information table (S160 Yes), the mobile station control unit 21 acquires the current position of the mobile station via the sensor signal processing unit 25 (S120). The current position of the mobile station is obtained via a GPS sensor.

  Then, the control unit 11 of the base station refers to the received reception sensitivity information table and determines whether the reception sensitivity at the current position is good (S161). The control unit 21 of the mobile station obtains the electric field strength at the point corresponding to the position information of the current position in the reception sensitivity information table, compares it with the threshold received in step S160, and if the electric field strength is equal to or greater than the threshold, It is determined that the sensitivity is good.

  When it is determined that the reception sensitivity at the current position is good (S161 Yes), the mobile station controller 21 similarly determines whether the reception sensitivity at the destination is good (S162). When it is determined that the destination reception sensitivity is also good (S162 Yes), the mobile station control unit 21 transmits the correction content transmission request and the ID of the mobile station 20 to the base station 10 via the communication unit 26 (S153). ). When step S153 is completed, the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the base station 10 stores the mobile station 20 corresponding to the ID transmitted in step S153 in the storage unit 13. The stored correction contents are transmitted (S30 in FIG. 3).

  If the reception sensitivity of the current position is not good (No in S161) or if the reception sensitivity of the destination is not good (No in S162), the mobile station 20 waits until reception of the next destination.

  If the mobile station 20 is a place where both the current position and the destination have a good electric field, the mobile station 20 is considered to be in the vicinity of the base station 10 in many cases. For this reason, according to the fourth and fifth aspects, only the mobile station 20 having a good communication state sufficient for changing the control program and setting contents (parameter values) without measuring the electric field strength or the like. Since the base station 10 is requested to transmit the correction content, the base station 10 can transmit the correction content to the limited mobile station 20.

[Operation variation of wireless communication system]
FIG. 18 is a flowchart for explaining a modification of the operation of the wireless communication system according to the present embodiment.
Unlike the operation example in FIG. 3, a continuity determination process (S20) for determining how long the communication state determined to be good at the time of determination thereafter is provided. By selecting the mobile stations 20 that are more likely to maintain a good communication state, the certainty can be further increased.

  Hereinafter, the aspect of the continuity determination process (S20) will be described.

[First mode of continuity determination]
FIG. 19 is a flowchart showing a first mode of continuity determination performed based on the moving direction of the mobile station. When the moving direction is close to the base station, it is expected that the communication state is good. Therefore, such a mobile station is selected as a target of correction contents.

  FIG. 19A is for determining continuity in the base station. After the good determination process (S10) is completed, the base station 10 acquires the moving direction of the mobile station (S201). This can be calculated as a position vector based on the position information of the mobile station acquired last by the control unit 11 of the base station 10 and the position information of the mobile station acquired at the previous time.

  And the control part 21 of a base station determines whether the moving direction of a mobile station is a direction which approaches a base station (S202). For example, the control unit 21 of the base station determines that the angle between the position vector from the position of the last acquired mobile station to the base station and the position vector corresponding to the moving direction of the mobile station is less than 90 degrees. May be determined as approaching the base station.

  If the direction is closer (Yes in S202), the process proceeds to the subsequent process. For example, in the case of FIG. 3, the correction content stored in the storage unit 13 is transmitted from the base station 10 to the mobile station 20. (S30 in FIG. 3).

  FIG. 19B is for determining the continuity in the mobile station. The mobile station 20 acquires the moving direction of the mobile station after the good determination process (S10) is completed (S203). This can be determined by the control unit 21 of the mobile station 20 acquiring a signal from the gyro sensor via the sensor signal processing unit 25.

  And the control part 21 of a base station determines whether the moving direction of a mobile station is a direction which approaches a base station (S204). For example, if the angle between the position vector from the current position of the mobile station toward the base station and the position vector corresponding to the moving direction of the mobile station is less than 90 degrees, the control unit 21 of the base station What is necessary is just to determine that it is approaching.

  When the mobile station 20 is approaching the base station 10 (S204 Yes), the mobile station control unit 21 transmits the correction content transmission request and the mobile station 20 ID to the base station 10 via the communication unit 26. (S153). When step S153 is completed, the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the base station 10 stores the mobile station 20 corresponding to the ID transmitted in step S153 in the storage unit 13. The stored correction contents are transmitted (S30 in FIG. 3).

  Even if the current position is a place where the electric field is good, if the mobile station moves away from the base station 10, it may enter a place where the electric field is bad after a few minutes. Thus, according to the first aspect, by selecting the mobile station 20 whose traveling direction is toward the base station, it is possible to exclude the mobile station 20 that would not continue to be in good condition from the transmission target of the correction content. it can.

[Second aspect of continuity determination]
FIG. 20 is a flowchart showing a second aspect of the continuity determination performed based on the traveling speed of the mobile station. When the traveling speed of the mobile station is slow, traffic congestion or the like is considered, and when the communication state of the traffic jam location is good, it is expected that it will continue to some extent. Therefore, such a mobile station is selected as a target of correction contents.

  FIG. 20A is for determining continuity in the base station. After the good determination process (S10) is completed, the base station 10 acquires the traveling speed of the mobile station (S205).

  This is because the control unit 11 of the base station 10 sets the movement distance calculated by the position information of the mobile station acquired last and the position information of the mobile station acquired at the time immediately before the position information acquisition interval. It can be derived by dividing by time. Then, the control unit 21 of the base station determines whether or not the traveling speed of the mobile station is equal to or less than a predetermined threshold stored in advance in the storage unit 13 of the base station (S206).

  If the traveling speed is less than or equal to the threshold value (S206 Yes), the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the correction stored in the storage unit 13 from the base station 10 to the mobile station 20 The contents are transmitted (S30 in FIG. 3).

FIG. 20B is for determining the continuity in the mobile station. RAM of mobile station 20 in advance
It is assumed that 22 stores a threshold value used for continuity determination.

  The mobile station 20 acquires the traveling speed of the mobile station after the good determination process (S10) is completed (S207). This can be determined by the control unit 21 of the mobile station 20 acquiring a signal from the speed sensor via the sensor signal processing unit 25.

And the control part 21 of a base station determines whether the traveling speed of a mobile station is below the threshold value stored in RAM22 of a mobile station (S208). If the traveling speed is equal to or less than the threshold (S208 Yes), the mobile station control unit 21 transmits the correction content transmission request and the ID of the mobile station 20 to the base station 10 via the communication unit 26 (S153). When step S153 is completed, the process proceeds to the subsequent stage. For example, in the case of FIG. 3, the base station 10 stores the mobile station 20 corresponding to the ID transmitted in step S153 in the storage unit 13. The stored correction contents are transmitted (S30 in FIG. 3).

  As described above, according to the second aspect, mobile stations 20 that are not guaranteed to stay for a long time in a place with a good electric field, such as mobile stations 20 traveling on a highway, can be excluded from transmission targets of correction contents. In addition, if the travel speed threshold is set so that only the mobile station 20 in a traffic jam is selected, even if transmission of position information is stopped while the correction content is being reflected (such as rewriting the control program or overwriting the setting content), Since the moving distance is short, there is an advantage that the error from the mobile station last received by the base station 10 is small and the influence is small. That is, in this case, there is a possibility that the normal business can be temporarily stopped.

[Third aspect of continuity determination]
In the third aspect, continuity determination is performed based on the operating state of the mobile station. The operating state of the mobile station 20 includes, for example, “actual vehicle”, “empty vehicle (standby)”, “empty vehicle (sink)” in the case of a taxi dispatch system. The “actual vehicle” is in passenger transportation, the “empty vehicle (standby)” is a state where the customer is waiting in a stopped state, and the “empty vehicle (sink)” is a state where the customer is waiting in a driving state.

  These operating states are managed by the base station 10. Here, a data structure for managing a mobile station in “empty (standby)” will be described.

  FIG. 21 is a diagram illustrating a data configuration example of the registration order table. The registration order table of FIG. 21 includes data items “order” and “ID information”, and is stored in the storage unit 13 of the base station.

“Order” indicates the order in which the mobile station 20 enters the standby state. This means that the higher the mobile station 20, the longer the standby state. Normally, when there is a vehicle allocation request at a vehicle allocation center, a fair distribution is performed by allocating requests from mobile stations with higher ranks. “ID” is an identifier for identifying the mobile station 20.

  In the registration order table of FIG. 21, it is expected that the mobile station 20 at the lower level will remain stationary for a while. Therefore, it is expected that such a mobile station 20 will be maintained to some extent when the communication state at the stop location is good by setting the mobile station 20 as an object of correction contents. Therefore, such a mobile station is selected as a target of correction contents.

  FIG. 22 is a flowchart showing a third mode of continuity determination performed based on the operating state of the mobile station. After the good determination process (S10) is completed, the base station 10 identifies a vehicle in a standby state (S211). This is performed by the control unit 11 of the base station 10 referring to the registration order table of FIG.

And the control part 21 of a base station selects the mobile station whose registration order is below predetermined (S212).
Thus, when step S212 is completed, a plurality of mobile stations are selected by selecting “ID” in the registration order table, and the process proceeds to the subsequent stage. For example, in the case of FIG. Then, the correction content stored in the storage unit 13 is transmitted to the selected mobile station 20 (S30 in FIG. 3).

As described above, according to the third aspect, it is possible to select the mobile station 20 that is stopped for the customer waiting. If the standby place is a place with a good electric field, it can be determined that the mobile station will not move from a place with a good electric field for a while, and the base station 10 selects and selects the mobile station 20 that is expected to continue in a good communication state. Corrections can only be sent to selected mobile stations
[Operation 2nd Modification of Wireless Communication System]
FIG. 23 is a flowchart illustrating a second modification of the operation of the wireless communication system according to the present embodiment. Unlike the operation example in FIG. 3, it is characterized in that ranking is performed according to conditions (S 21), and correction content is transmitted only to the upper mobile stations. By selecting mobile stations 20 that can communicate under advantageous conditions, the reliability of communication can be further increased.

  FIG. 24 is a diagram illustrating a data configuration example of a general-purpose rank table used in step S21. As a condition, for example, a mobile station having a large received electric field strength to be measured can be used. For this purpose, the base station 10 determines the received signal strength of the uplink signal measured in step S104 in FIG. 4, the received signal strength of the downlink signal measured in step S108 in FIG. 5, and received by the base station in step S103 in FIG. It may be stored for each mobile station.

  FIG. 24A is an example of a rank table using the received electric field strength. Data items include “order”, “ID” which is an identifier of the mobile station, and “electric field strength” regarding each mobile station measured as described above.

  Further, as a condition, a mobile station having a large number of receptions as described in FIGS. 6 to 9 or a mobile station having a small number of retransmissions can be used. For this purpose, the base station 10 may store the above-mentioned reception count and retransmission count for each mobile station.

  FIG. 24B is an example of a rank table based on the number of times. The data items include “order”, “ID” which is an identifier of the mobile station, and “number of times” (the number of receptions and the number of retransmissions) regarding each mobile station measured as described above.

  As described above, according to the second modified example, by transmitting the correction contents according to the order, it is possible to sequentially perform the changing operation from the mobile station in good condition, so that the efficiency can be improved.

[Operation of Wireless Communication System, Third Modification]
FIG. 25 is a flowchart illustrating a third modification example of the operation of the wireless communication system according to the present embodiment. Unlike the operation example in FIG. 3, the correction content is divided into a plurality of transmission blocks (S22), and transmission using the communication band efficiently is performed according to the situation.

  For example, there is a case where 10 blocks of 100 block correction contents are updated. Further, there may be a case where the number of blocks to be transmitted is determined according to the order in the registration order table of FIG. 22, and the mobile station 20 that can communicate under advantageous conditions is selected more efficiently. Change work can be done.

  As described above, according to the third modification, the correction content can be efficiently and safely transmitted according to the communication state by dividing the block into an appropriate number of blocks and transmitting the correction content based on the communication state.

  According to the wireless communication system of the present embodiment described above, it is determined whether the communication state between the base station 10 and the mobile station 20 is good, and it can be determined that the communication state is good from the electric field strength and the position information of the mobile station 20. By transmitting the correction contents from the base station 10 for the mobile station 20, the change work to the control program in which the defect is corrected and the setting contents after the change can be surely performed. Further, it is determined how long the communication state that is determined to be good at the time of determination and then the mobile stations 20 that are more likely to maintain the good communication state are selected. The time required for the change work can be shortened.

  Moreover, according to the radio | wireless communications system of this embodiment, a malfunction etc. can be corrected, without stopping a normal operation | work. Further, by transmitting the correction contents according to the order, it is possible to perform the changing operation sequentially from the mobile station with good conditions, so that the efficiency can be improved.

It is a structural example of the radio | wireless communications system in embodiment of this invention. It is a flowchart explaining the starting process of a mobile station. It is a flowchart explaining an example of operation | movement of the radio | wireless communications system of this embodiment. It is a flowchart which shows the 1st aspect of the favorable determination performed in a base station. It is a flowchart which shows the 2nd aspect of the favorable determination performed in a base station. It is a flowchart which shows the 3rd aspect of the favorable determination performed in a base station. It is a flowchart which shows the 4th aspect of the favorable determination performed in a base station. It is a flowchart which shows the 5th aspect of the favorable determination performed in a base station. It is a flowchart which shows the 6th aspect of the favorable determination performed in a base station. It is a figure which shows the data structural example of the receiving sensitivity information table used by the 7th aspect of the favorable determination performed in a base station. It is a flowchart which shows the 7th aspect of the favorable determination performed in a base station. It is a flowchart which shows the 8th aspect of the favorable determination performed in a base station. It is a flowchart which shows the 1st aspect of the favorable determination performed in a mobile station. It is a flowchart which shows the 2nd aspect of the favorable determination performed in a mobile station. It is a flowchart which shows the 3rd aspect of the favorable determination performed in a mobile station. It is a flowchart which shows the 4th aspect of the favorable determination performed in a mobile station. It is a flowchart which shows the 5th aspect of the favorable determination performed with a mobile station. It is a flowchart explaining the modification of the operation | movement of the radio | wireless communications system of this embodiment. It is a flowchart which shows the 1st aspect of continuity determination. It is a flowchart which shows the 2nd aspect of continuity determination. It is a figure which shows the data structural example of a registration order table. It is a flowchart which shows the 3rd aspect of continuity determination. It is a flowchart explaining the 2nd modification of operation | movement of the radio | wireless communications system of this embodiment. It is a figure which shows the example of a data structure of a general purpose rank table. It is a flowchart explaining the 3rd modification of operation | movement of the radio | wireless communications system of this embodiment.

Explanation of symbols

10 base station, 11 control unit, 12 RAM, 13 storage unit, 14 communication unit and electric field measurement unit, 15 signal line, 16 antenna, 20 mobile station, 21 control unit, 22 RAM, 23 NV-MEM, 24 F-MEM , 25 sensor signal processing unit, 26 communication unit / electric field measuring unit, 27 signal line

Claims (30)

A mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function;
From a base station comprising a communication unit that enables communication with the mobile station, a storage unit that stores correction information for correcting the program, and an electric field measurement unit that measures the electric field strength of a received signal A program operation changing method in a wireless communication system comprising:
When the base station receives an uplink signal from the mobile station, the electric field measurement unit of the base station measures the electric field strength of the uplink signal,
When the measured field strength of the uplink signal is equal to or higher than a first threshold, the correction information is transmitted to the mobile station by the communication unit of the base station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. In claim 1,
There are a plurality of mobile stations,
The program operation changing method, wherein the communication information of the base station transmits the correction information in order from the mobile station having the measured electric field strength of the uplink signal. In claim 1,
The mobile station further includes an electric field measuring unit that measures the electric field strength of the received signal,
When the mobile station receives a downlink signal from the base station, the electric field measurement unit of the mobile station measures the electric field strength of the downlink signal,
The mobile station communication unit transmits the measured downlink signal field strength to the base station,
When the measured electric field strength of the uplink signal is equal to or higher than the first threshold, and when the measured electric field strength of the downlink signal is equal to or higher than the second threshold, the communication unit of the base station A program operation changing method, wherein the correction information is transmitted to the mobile station. A mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function;
A program operation changing method in a wireless communication system comprising a communication unit that enables communication with the mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance.
When the base station transmits a downlink signal to the mobile station and the mobile station transmits an uplink signal in response to the received downlink signal, the base station transmits a predetermined time after transmitting the downlink signal. The number of occurrences of an event in which the base station receives the uplink signal, or the number of occurrences of an event in which the base station does not receive the uplink signal within a predetermined time after the base station transmits the downlink signal. The base station remembers either
Depending on whether the number of occurrences within a predetermined period exceeds a predetermined threshold, the correction information is transmitted to the mobile station by the communication unit of the base station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. In claim 4,
There are a plurality of mobile stations,
The program operation changing method, wherein the correction information is transmitted to the plurality of mobile stations in an order determined based on the number of occurrences by the communication unit of the base station. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A program operation changing method in a wireless communication system comprising a communication unit that enables communication with the mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance.
By the position detection unit, obtaining position information specifying the current position of the mobile station,
When the mobile station transmits an uplink signal including the position information to the base station every time the mobile station moves a predetermined distance, the base station determines whether the base station is based on the position information included in the uplink signal received by the base station. The base station calculates the distance traveled by the mobile station while receiving an uplink signal,
The base station stores either the number of times the calculated distance matches the predetermined distance or the number of times the calculated distance does not match the predetermined distance,
Depending on whether or not the number of times within a predetermined period exceeds a predetermined threshold, the correction information is transmitted to the mobile station by the communication unit of the base station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. In claim 6,
There are a plurality of mobile stations,
The program operation changing method, wherein the correction information is transmitted to the plurality of mobile stations in an order determined based on the number of times by the communication unit of the base station. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
From a base station comprising a communication unit that enables communication with the mobile station, and a storage unit that stores in advance correction information for correcting the program and reception sensitivity information at a location where the mobile station is located A program operation changing method in a wireless communication system comprising:
When location information for specifying a destination is stored in the storage unit of the mobile station, the location detection unit acquires location information for specifying the current location of the mobile station,
An uplink signal including location information specifying the destination and the current location is transmitted to the base station by the communication unit of the mobile station,
Based on the reception sensitivity information, when it is determined that the reception sensitivity of the destination and the current position are both good, the base station communication unit transmits the correction information to the mobile station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
From a base station comprising a communication unit that enables communication with the mobile station, and a storage unit that stores in advance correction information for correcting the program and reception sensitivity information at a location where the mobile station is located A program operation changing method in a wireless communication system comprising:
By the communication unit of the base station, the mobile station transmits a downlink signal including location information for specifying a destination,
When the mobile station receives the downlink signal, the position detection unit acquires position information for specifying the current position of the mobile station,
In response to a downlink signal received by the mobile station, the communication unit of the mobile station transmits an uplink signal including position information for specifying the current position,
Based on the reception sensitivity information, when it is determined that the reception sensitivity of the destination and the current position are both good, the base station communication unit transmits the correction information to the mobile station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. In any one of Claims 1 thru | or 7,
The base station further includes an azimuth acquiring unit that acquires a moving direction of the mobile station,
When the moving direction of the mobile station is a direction approaching the base station, the modification information is transmitted to the mobile station by the communication unit of the base station. In any one of Claims 1 thru | or 7,
The base station further includes a speed acquisition unit that acquires a moving speed of the mobile station,
When the moving speed of the mobile station is equal to or less than a predetermined threshold, the modification information is transmitted to the mobile station by the communication unit of the base station. In any one of Claims 1 thru | or 7,
There are a plurality of mobile stations,
The storage unit of the base station further stores a registration table that sequentially registers mobile stations that are in a standby state before operation,
Program operation change characterized by transmitting the correction information to the mobile station by the communication unit of the base station when the mobile station is in a standby state and the rank of the mobile station is lower than a predetermined level. Method. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and an electric field measurement unit for measuring the electric field strength of a received signal,
A program operation changing method in a wireless communication system comprising a communication unit that enables communication with the mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance.
When the mobile station receives a downlink signal from the base station, the electric field measurement unit of the mobile station measures the electric field strength of the downlink signal,
When the measured electric field strength of the downlink signal is equal to or greater than a predetermined threshold, the communication unit of the mobile station transmits an uplink signal including a correction information acquisition request to the base station,
When receiving the uplink signal, the base station communication unit transmits the correction information to the mobile station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. A mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function;
A program operation changing method in a wireless communication system comprising a communication unit that enables communication with the mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance.
When the base station transmits a downlink signal to the mobile station, and the mobile station transmits an uplink signal in response to the received downlink signal, a predetermined time after the mobile station receives the downlink signal The number of occurrences of an event in which the mobile station receives the downlink signal again, or the mobile station does not receive the downlink signal again within a predetermined time after the mobile station receives the downlink signal The mobile station stores any number of occurrences of the event,
Depending on whether the number of occurrences within a predetermined period exceeds a predetermined threshold, the mobile station communication unit transmits an uplink signal including a correction information acquisition request to the base station,
When receiving the uplink signal, the base station communication unit transmits the correction information to the mobile station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
From a base station comprising a communication unit that enables communication with the mobile station, and a storage unit that stores in advance correction information for correcting the program and reception sensitivity information at a location where the mobile station is located A program operation changing method in a wireless communication system comprising:
When location information for specifying a destination is stored in the storage unit of the mobile station, the communication unit of the mobile station transmits a first uplink signal including a reception sensitivity information acquisition request to the base station,
When receiving the first uplink signal, the communication unit of the base station transmits the reception sensitivity information to the mobile station,
By the position detection unit, obtaining position information specifying the current position of the mobile station,
Based on the reception sensitivity information received from the base station, when it is determined that both the destination and the current position have good reception sensitivity, the mobile station communication unit includes a second uplink including a correction information acquisition request. Sending a signal to the base station;
When receiving the second uplink signal, the base station communication unit transmits the correction information to the mobile station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
From a base station comprising a communication unit that enables communication with the mobile station, and a storage unit that stores in advance correction information for correcting the program and reception sensitivity information at a location where the mobile station is located A program operation changing method in a wireless communication system comprising:
By the communication unit of the base station, the mobile station transmits a downlink signal including location information for specifying a destination,
When the mobile station receives the downlink signal, the mobile station communication unit transmits a first uplink signal including a reception sensitivity information acquisition request to the base station,
When receiving the first uplink signal, the communication unit of the base station transmits the reception sensitivity information to the mobile station,
By the position detection unit, obtaining position information specifying the current position of the mobile station,
Based on the reception sensitivity information received from the base station, when it is determined that both the destination and the current position have good reception sensitivity, the mobile station communication unit includes a second uplink including a correction information acquisition request. Sending a signal to the base station;
When receiving the second uplink signal, the base station communication unit transmits the correction information to the mobile station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A program operation changing method in a wireless communication system comprising a communication unit that enables communication with the mobile station, and a base station that includes a storage unit in which correction information for correcting the program is stored in advance.
The position detection unit acquires position information specifying the current position of the mobile station, and transmits a first uplink signal including the position information to the base station every time the mobile station moves a predetermined distance,
When the base station receives the first uplink signal, the communication unit of the base station transmits a downlink signal including a reception confirmation signal and a predetermined threshold to the mobile station,
When the mobile station does not receive the downlink signal within a predetermined time after transmitting the first uplink signal, the mobile station retransmits the first uplink signal and stores the number of retransmissions in the storage unit of the mobile station And
When the number of retransmissions stored in the storage unit of the mobile station within a predetermined period does not exceed a predetermined threshold, the communication unit of the mobile station sends a second uplink signal including a correction information acquisition request to the base station. Send
When the base station receives the second uplink signal, the communication unit of the base station transmits the correction information to the mobile station,
The program operation changing method, wherein the control unit changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit of the mobile station. In any of claims 13 to 17,
The mobile station further includes an azimuth acquisition unit that acquires a moving direction of the mobile station,
When the moving direction of the mobile station is a direction approaching the base station, the modification information acquisition request is transmitted to the base station by the communication unit of the mobile station. In any of claims 13 to 17,
The mobile station further includes a speed acquisition unit that acquires a moving speed of the mobile station,
When the moving speed of the mobile station is equal to or less than a predetermined threshold, the communication unit of the mobile station transmits the correction information acquisition request to the base station. In any one of Claims 1 thru | or 19.
The program operation changing method, wherein the correction information is divided and transmitted by a communication unit of the base station. A mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function;
A base station comprising a communication unit that enables communication with the mobile station, a storage unit that stores correction information for correcting the program, and an electric field measurement unit that measures the electric field strength of a received signal. Have
The electric field measurement unit of the base station measures the electric field strength of the uplink signal when the base station receives the uplink signal from the mobile station,
The communication unit of the base station transmits the correction information to the mobile station when the measured field strength of the uplink signal is greater than or equal to a first threshold,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function;
A base station including a communication unit that enables communication with the mobile station, and a storage unit in which correction information for correcting the program is stored in advance;
When the base station transmits a downlink signal to the mobile station and the mobile station transmits an uplink signal in response to the received downlink signal, the base station transmits the downlink signal to the storage unit of the base station. The number of occurrences of an event in which the base station receives the uplink signal within a predetermined time after transmitting a downlink signal, or the base station transmits the uplink signal within a predetermined time after the base station transmits the downlink signal. One of the occurrences of the event that does not receive the signal is stored,
The communication unit of the base station transmits the correction information to the mobile station according to whether the number of occurrences within a predetermined period exceeds a predetermined threshold,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A base station including a communication unit that enables communication with the mobile station, and a storage unit in which correction information for correcting the program is stored in advance;
When the mobile station transmits an uplink signal including the position information to the base station every time the mobile station moves a predetermined distance, the location included in the uplink signal received by the base station is stored in the storage unit of the base station Based on the information, either the number of times the distance that the mobile station has moved while the base station receives the uplink signal matches the predetermined distance or the number of times the moving distance does not match the predetermined distance is stored. And
The communication unit of the base station transmits the correction information to the mobile station according to whether the number of times within a predetermined period exceeds a predetermined threshold,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A base station comprising: a communication unit that enables communication with the mobile station; and a storage unit in which correction information for correcting the program and reception sensitivity information at a location where the mobile station is located are stored in advance. Have
The position detection unit acquires position information for specifying a current position of the mobile station when position information for specifying a destination is stored in the storage unit of the mobile station;
The communication unit of the mobile station transmits an uplink signal including position information specifying the destination and the current position to the base station,
The communication unit of the base station transmits the correction information to the mobile station when the reception sensitivity of the destination and the current location is determined to be good based on the reception sensitivity information.
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A base station comprising: a communication unit that enables communication with the mobile station; and a storage unit in which correction information for correcting the program and reception sensitivity information at a location where the mobile station is located are stored in advance. Have
When the mobile station receives a downlink signal including location information for specifying a destination, the location detection unit acquires location information for specifying the current location of the mobile station;
The communication unit of the mobile station transmits an uplink signal including position information identifying the current position in response to a downlink signal received by the mobile station,
The communication unit of the base station transmits the downlink signal to the mobile station and determines that the reception sensitivity of the current location specified by the destination and the position detection unit is good based on the reception sensitivity information. If so, send the correction information to the mobile station,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function;
A base station comprising a communication unit that enables communication with the mobile station, a storage unit that stores correction information for correcting the program, and an electric field measurement unit that measures the electric field strength of a received signal. Have
The electric field measurement unit of the mobile station measures the electric field strength of the downlink signal when the mobile station receives the downlink signal from the base station,
The communication unit of the mobile station transmits an uplink signal including a correction information acquisition request to the base station when the measured electric field strength of the downlink signal is a predetermined threshold or more,
The communication unit of the base station, when receiving the uplink signal, transmits the correction information to the mobile station,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit storing a program, a control unit capable of executing the program, and a communication unit having a communication function;
A base station including a communication unit that enables communication with the mobile station, and a storage unit in which correction information for correcting the program is stored in advance;
In the storage unit of the mobile station, when the base station transmits a downlink signal to the mobile station and the mobile station transmits an uplink signal in response to the downlink signal received, the mobile station The number of occurrences of an event in which the mobile station receives the downlink signal again within a predetermined time after receiving a downlink signal, or the mobile station receives the downlink signal within a predetermined time after the mobile station receives the downlink signal. One of the number of occurrences of the event that will not receive the downstream signal again,
The communication unit of the mobile station transmits an uplink signal including a correction information acquisition request to the base station according to whether the number of occurrences within a predetermined period exceeds a predetermined threshold,
The communication unit of the base station, when receiving the uplink signal, transmits the correction information to the mobile station,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A base station comprising: a communication unit that enables communication with the mobile station; and a storage unit in which correction information for correcting the program and reception sensitivity information at a location where the mobile station is located are stored in advance. Have
The position detection unit acquires position information that identifies a current position of the mobile station,
The communication unit of the mobile station transmits a first uplink signal including a reception sensitivity information acquisition request to the base station when position information for specifying a destination is stored in the storage unit of the mobile station, and A second uplink signal including a correction information acquisition request when it is determined that both the destination and the current position specified by the position detection unit are good based on the reception sensitivity information received from the base station; To the base station,
When the communication unit of the base station receives the first uplink signal, the communication unit transmits the reception sensitivity information to the mobile station, and receives the second uplink signal, the correction information is transferred to the mobile station. To the station,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A base station comprising: a communication unit that enables communication with the mobile station; and a storage unit in which correction information for correcting the program and reception sensitivity information at a location where the mobile station is located are stored in advance. Have
The position detection unit acquires position information for specifying a current position of the mobile station,
The communication unit of the mobile station transmits a first uplink signal including a reception sensitivity information acquisition request to the base station when the mobile station receives a downlink signal including position information for specifying a destination, and A second uplink signal including a correction information acquisition request when it is determined that both the destination and the current position specified by the position detection unit are good based on the reception sensitivity information received from the base station; To the base station,
The communication unit of the base station transmits the downlink signal to the mobile station, and when receiving the first uplink signal, transmits the reception sensitivity information to the mobile station, and the second uplink signal When the mobile station receives the correction information,
The said control part changes the said program stored in the memory | storage part of the said mobile station based on the said correction information received by the communication part of the said mobile station, The radio | wireless communications system characterized by the above-mentioned. A mobile station comprising a storage unit for storing a program, a control unit capable of executing the program, a communication unit having a communication function, and a position detection unit for detecting a current position,
A base station including a communication unit that enables communication with the mobile station, and a storage unit in which correction information for correcting the program is stored in advance;
The position detection unit acquires position information for specifying a current position of the mobile station,
The communication unit of the mobile station transmits a first uplink signal including the position information to the base station every time the mobile station moves a predetermined distance, and transmits a first time after transmitting the first uplink signal. When the downlink signal that is transmitted from the base station and includes a reception confirmation signal and a predetermined threshold is not received, the first uplink signal is retransmitted and the number of retransmissions is stored in the storage unit of the mobile station Further, if the number of retransmissions stored in the storage unit of the mobile station within a predetermined period does not exceed a predetermined threshold, a second uplink signal including a correction information acquisition request is transmitted to the base station,
The communication unit of the base station transmits the downlink signal to the mobile station when receiving the first uplink signal, and transmits the correction information to the mobile station when receiving the second uplink signal And
The program operation changing method, wherein the control unit of the mobile station changes the program stored in the storage unit of the mobile station based on the correction information received by the communication unit.

Images