JPH0572314A - Position-measuring system of traveling body - Google Patents

Abstract

PURPOSE:To enable processing at a radio base station to be simplified and processing time to be reduced by using only a position-measuring signal which is received by a radioreception station which is a specific station to be processed when calculating a position of a traveling body. CONSTITUTION:In a radio base station B, addresses of radio-reception stations R1-R7 and installation positions correspond and the correspondence is registered at a reception station table 1 and addresses of traveling radio stations X1-X4 are registered at a traveling station data memory 2. Furthermore, a processing target station memory 3 is provided at the base station B. When for example obtaining a position of a radio station X2 which exists within a specific range for a specific radio station X1, operation processing is performed by an operation control part 4 which consists of a computer device, etc., only for data signals D1-D3 from at least three reception stations R1-R3 which received position-measuring signals P1-P3 which are set to the memory 3. A radio transmission part 5 is provided at the base station B for transmitting a paging signal to radio stations X1-X4 and then a radio-reception part 6 is provided for receiving; a data signal from reception stations R1-R7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile unit in which a mobile radio station is loaded on a mobile unit such as an automobile and the position of the mobile unit is calculated by exchanging radio signals between a fixed radio station and a mobile radio station. The present invention relates to a body positioning method.

[0002]

2. Description of the Related Art In recent years, an increasing number of companies such as courier companies use a large number of automobiles. In this kind of business,
How to efficiently distribute cars is an important issue, and the necessity of grasping the position of each car is increasing for managing the dispatch. As a moving body positioning system for recognizing the position of a moving body such as an automobile, the position of the moving body can be determined by exchanging wireless signals between a fixed wireless station on the ground and a mobile wireless station loaded on the moving body. Something to calculate is considered. That is, a mobile positioning system includes one radio base station, a plurality of radio receiving stations having different addresses, and a plurality of mobile radio stations having different addresses and mounted on a mobile body. Composed. The radio base station transmits a call signal including the address of the mobile radio station, and when the mobile radio station receives the call signal, the address included in the call signal is the address set in the mobile radio station. If they match, the positioning signal is transmitted. When the positioning signal transmitted from the mobile wireless station is received by the wireless receiving station, the wireless receiving station receiving the positioning signal sends a data signal including at least the address set in the wireless receiving station and the reception time of the positioning signal. Transmit to the wireless base station. The installation position of the wireless reception station is registered in advance corresponding to the address of the wireless reception station, and the wireless base station obtains the installation position of the wireless reception station based on the address of the wireless reception station included in the data signal, The position of the mobile radio station that generated the positioning signal is calculated using the reception time of the positioning signal.

[0003]

By the way, there is a case where it is desired to grasp the position of an automobile existing within a predetermined range from a specific automobile in order to efficiently dispatch the automobile. In such a case, the radio base station needs to sequentially send the calling signal to all the mobile radio stations, and as a result, the radio base station calculates the positions of all the mobile radio stations. Will be needed. That is, the positions of all the vehicles are calculated in order to know the positions of some vehicles existing within a predetermined range from a specific vehicle, which causes a problem that a huge amount of time is required. In order to reduce this time, it is conceivable to adopt a large computer with a large processing capacity for the wireless base station, but there is a problem that this leads to an increase in the introduction cost of the mobile positioning system.

An object of the present invention is to solve the above problems, and when a mobile radio station existing within a predetermined range from a particular mobile radio station is grasped, the radio base station is simplified by simplifying the processing. An object of the present invention is to provide a positioning system for a mobile body that can reduce processing time at a station.

[0005]

According to the present invention, the installation positions of a plurality of wireless receiving stations which can be individually identified and are fixed at fixed positions are registered in a wireless base station, and each has an address. A radio base station sends out a call signal, which is a radio signal including the address of the mobile radio station, to a plurality of mobile radio stations loaded on the mobile body, and the mobile radio station includes the call signal in the received call signal. When the address matches the set address, a positioning signal that is a wireless signal is sent out,
When the same positioning signal is detected by at least three wireless receiving stations, the wireless base station calculates the position of the moving body based on the installation position of the wireless receiving station that received the positioning signal and the reception time of the positioning signal. It is premised on the mobile positioning system.

In order to achieve the above object, in the invention of claim 1, the radio base station has at least three radio receiving stations that have received a positioning signal when detecting the position of a mobile radio station having a specific address. After registering as a processing target station, only the positioning signal received by the wireless receiving station that is the processing target station is used when calculating the position of the mobile by sequentially transmitting the call signal to other mobile wireless stations. is there.

According to the second aspect of the invention, the radio base station has at least three radio receiving stations that have received positioning signals when detecting the position of a mobile radio station having a specific address, and these radio receiving stations. After registering a wireless receiving station that has a specific relationship with the mobile station as a processing target station, when calculating the position of the moving body by sequentially sending a calling signal to other mobile wireless stations, the wireless receiving station that is the processing target station Only the received positioning signal is used.

[0008]

According to the first aspect of the present invention, when the positioning signal from another mobile radio station is received after the position of the particular mobile radio station is obtained, the radio receiving the positioning signal from the particular mobile radio station is received. Since only the receiving station is the processing target station and only the positioning signal received by the processing target station is used as the effective positioning signal, the wireless base station only needs to process the information from about three mobile wireless stations. Therefore, the amount of information processing can be greatly reduced. In other words, the processing time is shortened due to the large reduction in the amount of calculation, so that it is possible to downsize the computer for calculation, and as a result, the introduction cost is reduced.

In claim 2, since not only the wireless receiving station that has received the positioning signal from the specific mobile wireless station, but also the wireless receiving station having a specific relationship is also the processing target station, the comparison is made with claim 1. Although processing time will be longer if this is done, it is possible to expand the area for detecting mobile radio stations, and it is possible to detect mobile radio stations existing within a prescribed range for a specific mobile radio station without omission. You can do it.

[0010]

【Example】

(Embodiment 1) As shown in FIG. 3, one radio base station B
And a plurality of radio receiving stations R _{1 to} R ₇ (not limited to 7 stations) and a plurality of mobile radio stations X _{1 to} X ₄ (not limited to 4 stations). Each of the radio receiving stations R _{1 to} R ₇ and the mobile radio stations X _{1 to} X ₄ has an individual address. In the wireless base station B, as shown in FIG. 2, the addresses of the respective wireless receiving stations R _{1 to} R ₇ are associated with each other and registered in the receiving station table 1, and the mobile wireless station X ₁ The addresses of X ₄ to X ₄ are registered in the mobile station data memory 2. Further, the radio base station B is provided with a processing target station memory 3, and the specific mobile radio stations X _{1 to} X
₄ mobile radio stations X _{1 to} X existing within a predetermined range
When determining the position of the _4, the data signal from the wireless receiving station R ₁ to R ₇ which is set to the processing target station memory 3 only, to perform the arithmetic processing in the arithmetic control unit 4 made of a computer system Is becoming The radio base station B has a radio transmission unit 5 for transmitting a call signal to the mobile line stations X _{1 to} X ₄ ,
Also, a wireless reception unit 6 that receives data signals from the wireless reception stations R _{1 to} R ₇ is also provided.

That is, a specific mobile radio station (here, X
To detect the position of another mobile radio station (here, X ₂ ) existing within a predetermined range with respect to ( ₁ ),
As shown in FIG. 1, first, the address of the mobile radio station X ₁ is read from the mobile station data memory 2, and a radio signal including the address of the mobile radio station X ₁ is sent from the radio base station B to the mobile radio station X ₁ . The call signal C _{1 is} transmitted (step S
1). The mobile radio station X ₁ sends its own positioning signal P ₁ , which is a radio signal, because its preset address matches the address included in the call signal C ₁ . The positioning signal P ₁ is, for example, the radio receiving stations R _{1 to} R ₃
Received by. Each radio receiving station R ₁ to R has received the positioning signal P _{1 3} transmits the data signal D ₁ to D _3, respectively and a time of receiving the self-address and the positioning signal P ₁ to the radio base station B. In this embodiment, the data signal D ₁
Although D ₃ is transmitted wirelessly, it may be transmitted by wire. In the wireless base station B, when receiving the data signals D _{1 to} D ₃ from at least three wireless receiving stations R _{1 to} R ₃ (step S2), based on the addresses of the respective wireless receiving stations R _{1 to} R _3. The installation location is obtained from the receiving station table 1, and the installation location of each of the wireless receiving stations R _{1 to} R ₃ and the positioning signal P ₁
The position of the mobile radio station X ₁ is calculated in the arithmetic control unit 4 based on the reception times of P ₃ to P ₃ (step S3). Here, it registers the address of the wireless receiving station R ₁ to R ₃ which has received the positioning signal P ₁ from the mobile radio station X ₁ in the radio base station B as the process target station memory 3 (step S4).

Next, the addresses of the mobile radio stations X _{2 to} X ₄ except the mobile radio station X ₁ are read from the mobile station data memory 2 and, as shown in FIG. 4, the mobile radio stations X _{2 to} X ₄ are read. sequentially sends the call signal C ₂ -C ₄ including the address (step S5). Each mobile radio station X ₂ to X ₄ is to match the address contained in the paging signal C ₂ -C ₄ the address set is received, each positioning signal P ₂ to P
Send ₄ . Here, the wireless receiving stations R _{1 to} R ₇ capable of receiving the positioning signals P _{2 to} P ₄ respectively (R ₁ , R ₂ ,
_{R 3), (R 2,} R 3, R 4), (R 5, R 6, R 7)
Suppose Each of the wireless receiving stations R _{1 to} R ₇ has a positioning signal P.
When receiving the ₂ to P _4, and transmits the data signal D ₁ to D ₇ including the address of the reception time and the wireless receiving station R ₁ to R ₇ to the radio base station B. On the other hand, in the wireless base station B, the wireless receiving station R ₁ whose address is stored in the processing target station memory 3
Only a taken as the valid data signals for to R _3, the data signal from the other radio receiving station R ₄ to R ₇ is ignored (step S6, S7). That is, of the data signals D ₁ to D ₇ from the radio receiving station R ₁ to R _7, only the data signal D ₁ to D _3, except for the data signals D ₄ to D ₇ indicated by a broken line in FIG. 4 process It is adopted as the target of. Further, as described above, in the wireless base station B, when data signals are transmitted from three or more wireless receiving stations R _{1 to} R ₇ for one calling signal, the arithmetic processing unit 4 performs arithmetic processing. It calculates the position of the mobile radio station X ₁ to X ₄ Te (step S8). As a result, the positions of the mobile radio stations X _{2 to} X ₄ are calculated only when the data signals D _{1 to} D ₃ are simultaneously generated from the radio receiving stations R _{1 to} R ₃ for one calling signal. .. After the call signal C ₂ is sent to the mobile radio station X ₂ and the arithmetic processing is completed, the call signal C ₃ is sent to the next mobile radio station X ₃ and the call signal C to the last mobile radio station X ₄ is sent. _Four
The same operation is repeated until the process corresponding to is completed (step S9). Here, since only the mobile radio station X ₂ satisfies the condition, the position is calculated for the mobile radio station X ₂ .

[0013] As described above, the mobile radio station X ₂ existing within a predetermined range with respect to the mobile radio station X ₁ is a positioning signal P by the same radio receiving station R ₁ to R ₃ and the mobile radio station X _{1 Since} it is assumed that _{2 to} P ₄ are received, the positioning signal P ₁ is received when the mobile radio station X ₁ is called when calculating the positions of the mobile radio stations X _{2 to} X ₄ . By adopting only the data signals from the radio receiving stations R _{1 to} R ₃ , the processing amount of the arithmetic processing can be reduced. That is, during the processing for calculating the position of a mobile radio station X ₁ to X ₄ is one in which it is not possible to poll the other mobile radio station X ₁ to X _4, a target which performs processing radio By limiting the receiving stations R _{1 to} R ₇ , it is possible to shorten the total time of the arithmetic processing, the average time interval of polling is shortened, and the time required for positioning the mobile radio stations X _{1 to} X ₄ is shortened. Is shortened. Further, when the time required for positioning the mobile radio stations X _{1 to} X ₄ may be the same as the conventional one, the calculation speed of the calculation processing unit 4 can be reduced, so that it can be realized using an inexpensive computer device. Become.

(Second Embodiment) In the first embodiment, a mobile radio station X ₁ existing within a predetermined range with respect to a specific mobile radio station X ₁ .
_In order to calculate the position ₂ of the mobile radio station X _1, only the data signals from the radio receiving stations R _{1 to} R ₃ that have received the positioning signal P ₁ transmitted from the mobile radio station X ₁ are used. Only the mobile radio station X ₂ existing within a relatively narrow range can be found. In addition, the mobile radio station X ₁
In such a case but is moving at a relatively high speed, the mobile radio station X ₁ from the area that receives a positioning signal by wireless receiving station R ₁ to R ₃ is will go out, the radio receiving station R ₁ to R ₃ Finding a mobile radio station X ₂ capable of receiving a positioning signal may be meaningless.

[0015] In this embodiment, in addition to the wireless receiving station R ₁ to R ₃ which has received the positioning signal P ₁ from the mobile radio station X _1, when a specific relationship with the radio reception station R ₁ to R ₃ The radio receiving station R _{4 to} be regarded also has an address stored in the processing target station memory 3. As the wireless receiving station X ₄ having a specific relationship with the wireless receiving stations R _{1 to} R ₃ that have received the positioning signal P ₁ sent from the mobile wireless station X ₁ , for example, based on the position of the mobile wireless station X _1. , Another mobile radio station X ₂ ~
A radio receiving station R ₄ is selected which can be expected to be able to receive the positioning signals P _{2 to} P ₄ if X ₄ is within a predetermined range.

The subsequent processing is the same as that of the first embodiment.
If the wireless receiving stations R _{1 to} R ₄ having the addresses matching the addresses stored in the processing target station memory 3 simultaneously send data signals to three calling signals C _{2 to} C ₄ , Based on the data signal, the mobile radio station X ₂
The position of X ₄ is calculated. That is, of the data signals D ₁ to D ₇ sent out from the wireless receiving station R ₁ to R _7, except for the data signal D ₅ to D ₇ indicated by a broken line in FIG. 5, the data signal D ₁ to D ₄ It is the target of processing. Mobile radio stations X _{1 to} X ₄ and radio receiving stations R _{1 to} R ₇
5 is the same as that of the first embodiment, as shown in FIG. 5, the mobile radio station X ₂ is determined as to whether or not the mobile radio station X ₁ exists within a predetermined range. , X ₃ becomes two. Here, the wireless receiving station R ₁ which is the processing target station
Although the numbers of R ₄ to R ₄ are increased as compared with the case of the first embodiment, the arithmetic processing is significantly reduced as compared with the case where all the wireless receiving stations R _{1 to} R ₇ are the processing target stations. Also,
A mobile radio station X ₁ to X ₄ being located in the vicinity of a boundary of the receiving area of the radio receiving station R ₁ to R _3, even those that can not be detected in Example 1, employing the present embodiment Can be detected by.

[0017]

According to the invention of claim 1, when the positioning signal from another mobile radio station is received after determining the position of the specific mobile radio station, the positioning signal from the particular mobile radio station is received. Since only the wireless receiving station that has received is used as the processing target station and only the positioning signal received by the processing target station is used as the effective positioning signal, the wireless base station can process only the information from about three mobile wireless stations. The advantage is that the amount of information processing can be greatly reduced. That is, since the processing time is shortened due to the large reduction in the amount of calculation, it is possible to downsize the computer for calculation, and as a result, it is possible to reduce the introduction cost. ..

According to the second aspect of the present invention, not only the wireless receiving station that has received the positioning signal from the specific mobile wireless station but also the wireless receiving station having a specific relationship are the target stations for processing.
Although the processing time becomes longer than that of claim 1, the area for detecting the mobile radio station can be expanded, and mobile radio stations existing within a predetermined range with respect to a specific mobile radio station are leaked. There is an advantage that it can be detected without.

[Brief description of drawings]

FIG. 1 is an operation explanatory diagram showing an embodiment.

FIG. 2 is a block diagram of a radio base station used in the embodiment.

FIG. 3 is an operation explanatory diagram of the first embodiment.

FIG. 4 is an operation explanatory diagram of the first embodiment.

FIG. 5 is an operation explanatory diagram of the second embodiment.

[Explanation of symbols]

B wireless base station C _{1 to} C ₄ call signal D _{1 to} D ₇ data signal P _{1 to} P ₄ positioning signal R _{1 to} R ₇ wireless receiving station X _{1 to} X ₄ mobile wireless station

Claims (2)

[Claims] 1. An installation position of a plurality of wireless receiving stations that are individually identifiable and fixed in a fixed position is registered in a wireless base station, and each has an address and is loaded on a mobile body. To a plurality of mobile radio stations, a call signal that is a radio signal including the address of the mobile radio station is transmitted from the radio base station, and the mobile radio station sets the address included in the received call signal to the set address. When they match, a positioning signal that is a wireless signal is transmitted, and when the same positioning signal is detected by at least three wireless receiving stations, the wireless base station installs the wireless receiving station that received the positioning signal and the positioning signal In a mobile body positioning method for calculating the position of a mobile body based on a reception time, a radio base station has at least three stations that have received a positioning signal when detecting the position of a mobile radio station having a specific address. After registering the wireless receiving station as a processing target station, the positioning signal received by the wireless receiving station that is the processing target station when calculating the position of the moving body by sequentially sending the call signal to other mobile wireless stations. A positioning method for a mobile body characterized by using only the above. 2. The installation positions of a plurality of wireless receiving stations that are individually identifiable and fixed in fixed positions are registered in a wireless base station, and each has an address and is loaded on a mobile body. To a plurality of mobile radio stations, a call signal that is a radio signal including the address of the mobile radio station is transmitted from the radio base station, and the mobile radio station sets the address included in the received call signal to the set address. When they match, a positioning signal that is a wireless signal is transmitted, and when the same positioning signal is detected by at least three wireless receiving stations, the wireless base station installs the wireless receiving station that received the positioning signal and the positioning signal In a mobile body positioning method for calculating the position of a mobile body based on a reception time, a radio base station has at least three stations that have received a positioning signal when detecting the position of a mobile radio station having a specific address. After registering the wireless receiving stations and the wireless receiving stations having a specific relationship with these wireless receiving stations as processing target stations, a calling signal is sequentially transmitted to other mobile wireless stations to calculate the position of the mobile body. At this time, a positioning system for a mobile body, which uses only positioning signals received by a wireless receiving station that is a processing target station.