JP2002034064A - Mobile communication system and mobile station and base station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the position of a mobile station. SOLUTION: A mobile MDT receives a radio wave incoming from a base station and a number of multipath measuring means 4a measures the number of multipath of the received radio wave. Information of the number of multipath is transmitted as receiving condition data Dcnd to the base station. The base station is provided with a section for storing the positional data at each point in a communication area in correspondence with the number of multipath. Position of the mobile station is detected based on positional data corresponding to the information of the number of multipath having highest correlation with delivered information of the number of multipath among the numbers of multipath stored in the positional data storing section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly, to a mobile communication system provided with position detecting means for detecting a position of a mobile station.

[0002]

2. Description of the Related Art With the spread of mobile communication systems using wireless communication, the position of a mobile station, such as a mobile phone or a pager, that changes every moment is detected, and a stable communication state is established based on the detected information. Meanwhile, development of a mobile communication system capable of coping with a diversified mobile communication environment is desired.

As a method of detecting the position of the mobile station,
JP-A-7-231473 and JP-A-11-3086
No. 58, which discloses a code division multiple access.
2. Description of the Related Art A mobile position detection method in a mobile communication system of an ion Multiple Access (CDMA) system is known.

In the former method, the mobile station detects the received electric field strengths of radio waves arriving from a plurality of base stations, and estimates the position of the mobile station based on the detected received electric field strengths. .

In the latter method, the mobile station detects each reference signal transmitted synchronously from a plurality of base stations, and estimates the position of the mobile station based on the phase difference between the reference signals. And

[0006]

However, Japanese Patent Application Laid-Open No.
In the mobile object position detection method disclosed in Japanese Patent Publication No. 231473, when there is no great difference between the distances from a mobile station to a plurality of base stations, the distance between the mobile station and each base station is determined with high accuracy. There is a problem in that the mobile station cannot be detected, which makes it difficult to estimate the position of the mobile station with high accuracy.

In the moving object position detecting method disclosed in Japanese Patent Application Laid-Open No. H11-308658, when there are no direct waves from a plurality of base stations to the mobile station, the distance from each base station is detected with high accuracy. This makes it difficult to estimate the position of the mobile station with high accuracy.

An object of the present invention is to provide a mobile communication system capable of overcoming the above-mentioned conventional problems, detecting a position of a mobile station with higher accuracy, and adapting to a diversified mobile communication environment. Aim.

[0009]

In order to achieve the above object, a mobile communication system, a mobile station and a base station according to the present invention have a plurality of base stations arranged in a communication area and a mobile station located in the communication area. A mobile communication system for detecting the position of a station, a mobile station and a base station, wherein the mobile station includes a receiving unit for receiving an incoming radio wave from the base station, and an incoming signal from each base station received by the receiving unit. Multipath measuring means for measuring the number of multipaths based on a received signal by radio waves,
Transmitting means for transmitting the information on the number of multipaths to the base station, wherein the base station transmits the information on the number of multipaths based on the information on the number of multipaths transmitted. And a position detecting means for detecting the position of

[0010] In the mobile communication system, the mobile station and the base station having such a configuration, the mobile station receives a radio wave arriving from the base station and measures the number of multipaths of the received radio wave.
Then, the multipath number is transmitted to the base station, the base station detects the position of the mobile station based on the multipath number, and transmits position information indicating the position of the mobile station to the mobile station.

In order to achieve the above object, a mobile communication system, a mobile station, and a base station according to the present invention are provided with a plurality of base stations arranged in a communication area, and a position of the mobile station moving in the communication area. A mobile communication system, a mobile station, and a base station for detecting, wherein the mobile station includes a receiving unit that receives an incoming radio wave from the base station, and a reception signal based on the incoming radio wave from each base station received by the receiving unit. Multipath measuring means for measuring the number of multipaths on the basis of, the position detecting means for detecting a position based on information on the number of multipaths measured by the multipath measuring means, and the position information detected by the position detecting means Transmitting means for transmitting to the base station.

In the mobile communication system, the mobile station, and the base station having such a configuration, the mobile station receives a radio wave coming from the base station and measures the number of multipaths of the received radio wave.
Further, the mobile station detects the position of the mobile station based on the number of multipaths, and transmits information on the detected position of the mobile station to the base station.

Further, the present invention transmits user-provided data such as map information related to location information of a mobile station from a base station to the mobile station, and the mobile station transmits the user information such as the transmitted map information. Processing such as displaying the providing data and the location information of the mobile station is performed.

As described above, by measuring the number of multipaths, position detection is performed immediately in response to the actual environment (reception situation) around the mobile station, and highly accurate position detection is realized.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. As an embodiment, a mobile communication system using a wideband CDMA (W-CDMA) system, which is a type of a spread spectrum (SS) communication system, will be described. (First Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention.
This will be described with reference to FIG.

FIG. 1 is a diagram schematically showing the entire configuration of the present mobile communication system using the W-CDMA system, and shows the configuration of a hexagonal cell as an example.

In the present mobile communication system, the communication area is set in advance in an arbitrary number n of sections called "cells". Each cell SEL1 to SELn has a base station B1.
To Bn are set, and each cell SEL1 to SELn is set to be within a range where radio waves output from each of the base stations B1 to Bn can reach. It is prevented from occurring.

Then, when a mobile station such as a mobile phone moves in the communication area with the user, communication is performed with the base station in the moved cell.

FIG. 2 is a block diagram showing a configuration of the mobile station MDT such as the above-mentioned portable telephone, and FIG. 3 is a block diagram showing a configuration of a position detection processing unit BDT provided in each of the base stations B1 to Bn.

Referring to FIG. 2, the mobile station MDT includes a transmitting / receiving antenna 1, a receiving unit 2, a data processing / system controller 3, a position analyzing unit 4, and a transmitting unit 5.

The transmitting / receiving antenna 1 is connected to each of the base stations B1 to Bn.
Receiving the radio wave coming from the
Output to the side. The transmission signal STXm supplied from the transmission unit 5 is transmitted to each of the base stations B1 to Bn as a transmission radio wave.

The receiving section 2 generates a reception signal SRXm 'in which interference from an unnecessary frequency band is prevented by passing the reception signal SRXm through a wideband bandpass filter 2a, and the reception signal SRXm is generated by a despreading circuit 2b as a correlator. Is multiplied (despread) with the despread code sequence Sma from the despread code sequence generator 2c. Then, the despread signal Smb generated by the product is passed through a narrow-band bandpass filter 2d so that
The primary modulation signal Smc is returned to the primary modulation signal Smc, and the primary modulation signal Smc is passed through a detection circuit 2e to reproduce a baseband waveform detection signal. The demodulation circuit 2f further demodulates the detection signal to transmit the transmitted data. (Received data) Play DRXm.

Data processing unit / system controller 3
Has a microprocessor (MPU), controls the operation of the entire mobile station MDT, and performs various data processing based on the received data DRXm.

Further, the receiving section 2 is provided with a cell search section 6, and the cell search section 6 includes a base station code generator 6
a, a despreading circuit 6b as a correlator, and a synchronization determination unit 6c
And a base station selector 6d.

The base station code generator 6a is connected to each base station B1.
ＢBn are sequentially generated to determine the despread code sequences Sbs1ＳSbsn for discriminating each radio wave arriving from Bn.

The despreading circuit 6b receives the received signal SRXm 'from the wideband bandpass filter 2a and the despread code sequence Sbs1.
The correlation signals Scv1 to Scvn are output by calculating the respective correlations with Sbsn.

That is, the despreading circuit 6b receives the received signal SRX
A correlation signal Scv1 is generated by a correlation operation between m ′ and the despread code sequence Sbs1, and a correlation signal Scv2 is generated by a correlation operation between the received signal SRXm ′ and the despread code sequence Sbs2. The correlation operation is repeated until the correlation signal Scvn is generated by the correlation operation between the received signal SRXm 'and the despread code sequence Sbsn. Then, each time the generation of the n correlation signals Scv1 to Scvn is completed, the correlation calculation for generating the n correlation signals Scv1 to Scvn is repeated. Note that this correlation operation is performed using a section Tc / 4 that is １ ／ of the chip section (Chip Duration) Tc as a unit phase difference.

[0028] The synchronization determination unit 6c generates n correlation signals Scv1.
~ Scvn are generated each time the correlation signals Scv1 ~ Scv
A base station corresponding to the despread code sequence when the detected correlation signal is generated (base station corresponding to one of Sbs1 to Sbsn) by detecting a correlation signal having a maximum correlation value from n. Is determined, and the despread code sequence generator 2c is controlled so as to generate a despread code sequence Sma for synchronous reception with the determined base station.

[0029] The base station selecting section 6d outputs the correlation signals Scv1 to Sc.
In vn, identification code data TAG1 to TAGn for each of base stations B1 to Bn
To generate the correlation signals with identification codes Stag1 to Stagn associated with the respective base stations B1 to Bn, and supply them to the position analysis unit 4.

The position analyzing unit 4 is formed of an integrated circuit device having an arithmetic function such as a digital signal processor (DSP), and includes a multipath number measuring unit 4a and a multipath delay amount measuring unit 4b which will be sequentially described below. , A multipath electric field strength measuring section 4c, a base station electric field strength measuring section 4d, and a data generating section 4e. (Multipath Number Measurement Unit 4a) Multipath Number Measurement Unit 4a
Measures the number of multipaths MP1 to MPn of radio waves arriving at the mobile station MDT from the respective base stations B1 to Bn based on the correlation signals Stag1 to Stagn with identification codes. That is, the multipath numbers MP1 to MPn are measured as follows.

For example, as shown in FIG. 4, when the mobile station MDT is located at an arbitrary point P1 in the cell SELj among the cells SEL1 to SELn as the user moves, the base stations Bj and Bj + 2 Radio waves SP1, SP2, SP3, and SP4 from the mobile station arrive at the mobile station MDT, and thereby generate a correlation signal Stagj with an identification code having a correlation signal Scvj as shown in FIG. 5, the correlation value of the correlation signal Scvj In contrast, a correlation value larger than a threshold value THD for removing unnecessary correlation value components is detected as a peak, and the total number of detected peaks is set as a multipath number MPj.

Then, in order to show that the multipath number MPj was measured by the correlation signal Scvj generated based on the despread code sequence Sbsj for determining the base station Bj,
The identification code data TAGj is added to the multipath number MPj,
Multipath number data DMPj (MP
j, TAGj) and supplies it to the data generator 4e.

In this case, as shown in FIG. 4, the direct arrival wave SP1 from the base station Bj and the buildings BL1, BL1
Correlation signal Scvj as shown in FIG. 5 is generated according to reflected waves SP2 and SP3 arriving after being reflected by base station Bj + 2.
Is smaller than the threshold value THD. Therefore, the number of multipaths MPj obtained by the above peak detection is “3”.

As shown in FIG. 4, when the mobile station MDT is located at a certain point P2 in the cell SELj, the base station B
When radio waves SP5, SP6, SP7, and SP8 from j, Bj + 1, and Bj + 2 arrive at the mobile station MDT, thereby generating a correlation signal Stagj with an identification code having a correlation signal Scvj,
The peak of the correlation value of the correlation signal Scvj is detected, and the total number of detected peaks is set as the multipath number MPj. The number of multipaths MP is determined by the correlation signal Scvj generated based on the despread code sequence Sbsj for determining the base station Bj.
In order to indicate that j has been measured, the identification code data TAGj is added to the multipath number MPj, and the multipath number data DMPj (MPj, TAGj) with the identification code is supplied to the data generation unit 4e.

In this case, the base stations Bj, Bj + 1,
Directly arriving waves SP5, SP6, SP8 from Bj + 2 and base station Bj
The reflected wave SP7 output from the +1 and reflected by the building BL3 arrives at the mobile station MDT. The correlation signal Scvj obtained by the correlation operation between the received signal SRXm 'and the despread code sequence Sbsj includes the base station Bj Only the correlation value corresponding to the direct arrival wave SP5 from the base station Bj + 1 and the correlation values corresponding to the arrival waves SP6, SP7 and SP8 from the base stations Bj + 1 and Bj + 2 are smaller than the threshold value THD. Therefore, the number of multipaths MPj obtained by the above peak detection becomes “1”.

As shown in FIG. 4, when the mobile station MDT is located at a certain point P3 in the cell SELj, the base station B
j, Bj + 2, the radio waves SP9, SP10, SP11, SP12 arrive at the mobile station MDT, thereby generating a correlation signal Stagj with an identification code having a correlation signal Scvj. Peak detection is performed, and the total number of detected peaks is set as a multipath number MPj. And base station B
In order to indicate that the multipath number MPj has been measured by the correlation signal Scvj generated based on the despreading code sequence Sbsj for determining j, the identification code data TAGj is added to the multipath number MPj, The multi-pass number data DMPj (MPj, TAGj) is supplied to the data generator 4e.

In this case, the direct arrival waves SP9 and SP10 from the base stations Bj and Bj + 2 and the reflected waves SP11 and SP output from the base station Bj + 2 and reflected by the buildings BL4 and BL5.
12 arrives at the mobile station MDT, but only the correlation value corresponding to the directly arriving wave SP9 from the base station Bj appears in the correlation signal Scvj obtained by the correlation operation between the received signal SRXm ′ and the despread code sequence Sbsj. , Incoming wave SP from base station Bj + 2
The correlation values corresponding to 10, SP11, and SP12 are smaller than the threshold value THD. Therefore, the number of multipaths MPj obtained by the above peak detection becomes “1”.

Thus, the multipath number measuring section 4a provides the despread code sequence Sbs for determining the radio wave from the base station Bj.
j, the multipath number MPj is obtained by peak detection of the correlation signal Scvj generated based on the mobile station MDT.
Measure the actual number of multipaths MPj when is moved to an arbitrary position in the cell SELj. Then, by adding identification code data TAGj for indicating the relationship with the base station Bj to the number of multipaths MPj, a multipath number with identification code DMPj is generated and supplied to the data generation unit 4e.

Note that the suffix j is used for each of the base stations B1 to B
It is a variable indicating the relationship with n. Therefore, the multipath number measuring section 4a receives the n identification code-added correlation signals Stag1 to Stagn from the base station selecting section 6d,
Based on the correlation signals Scv1 to Scvn, the multipath number MP1
MPn is measured, and n pieces of multi-path number data DMP1 (MP1, TAG1) to DMPn (MPn, TA
Gn) and supplies it to the data generation unit 4e.

Further, the processing function of the multipath number measuring section 4a has been described by exemplifying a case where the mobile station MDT moves within the cell SELj.
n, the number of multipaths MP1 to MPn is measured based on the correlation signals Scv1 to Scvn of the correlation signals Stag1 to Stagn with identification codes, and the number of multipaths with n identification codes is determined. Data DMP1 (MP1, TA
G1) to DMPn (MPn, TAGn) and the data generator 4
e.

As described above, the multipath number measuring section 4a of the present embodiment, as schematically shown in FIG. 6A, outputs all the correlation signals Scv1 of the correlation signals Stag1 to Stagn with identification codes.
~ Scvn to be measured, the number of multipaths MP1 sequentially
To MPn.

However, as a modified example of the multipath number measuring section 4a, as shown in FIG. 6B, one of the correlation signals Scv1 to Scvn supplied n at a time satisfies a predetermined condition.
The two correlation signals Scvk are extracted, and the extracted correlation signals Sc are extracted.
The multipath number MPk is measured with vk as a measurement target, and the multipath number data DMPk (MPk, TAG) with identification code is measured.
k), the data may be supplied to the data generator 4e.

That is, the correlation signals Scv1 to Scvn are despread code sequences Sbs1 for discriminating the respective base stations B1 to Bn.
... Sbsn and the received signal SRXm ′.

Therefore, when the mobile station MDT has a certain cell SEL
If the cell is located anywhere within k, the cell S
The correlation signal Scvk obtained corresponding to the radio wave arriving from the base station Bk disposed in the ELk has a larger correlation value than other correlation signals (correlation signals excluding Scvk among Scv1 to Scvn).

That is, when the mobile station MDT has a certain cell SELk
, The correlation signal Scvk generated by the correlation between the arriving wave from the base station Bk and the despread code sequence Sbsk becomes a signal that indicates the number of multipaths most accurately, and the base station Bk Other correlation signals generated by the correlation between the arriving radio waves from other base stations and the despread code sequences Sbs1 to Sbsn have a high probability of being a correlation value smaller than the threshold value THD, so that they are not often used as measurement targets of the number of multipaths. It has no meaning.

Therefore, as shown in FIG. 6B, only the correlation signal Scvk having the largest correlation value among the n correlation signals Scv1 to Scvn is extracted, and the extracted correlation signal Sc is extracted.
The number of multipaths MPk is measured based on vk, and identification code data TAGk indicating the relevance to the base station Bk is added to the measured number of multipaths MPk to obtain multipath number data with identification code DMPk (MPk, TAGn). ) May be supplied to the data generation unit 4e.

According to this modification, the number of multipaths MPk is obtained by measuring only the arriving wave from the base station Bk provided in the cell SELk in which the mobile station MDT is located. To the data generation unit 4e with identification code data TAGk indicating the relevance to the base station Bk provided in the cell SELk in which the mobile station MDT is located. Data generator 4 for pass number data DMP1 to DMPn
e, the number of supplies to e can be reduced.

Further, since the mobile station MDT eliminates the incoming radio wave from the mobile station in the cell where the mobile station is not actually located, only the multipath number data DMP1 to DMPn with the identification code, which are particularly significant, are deleted. It can be supplied to the data generator 4e.

It should be noted that the configuration of the multipath number measuring section 4a is such that all of the correlation signals Scv1 to Scvn are to be measured and the multipath number data DMP1 to DMPn with identification code are supplied to the data generating section 4e. Whether the configuration is such that only the correlation signal that satisfies the above-mentioned predetermined condition among the correlation signals Scv1 to Scvn is to be measured and the multipath number data DMP1 to DMPn with the identification code is supplied to the data generation unit 4e as in the modification. , Can be appropriately selected according to design specifications and the like. (Multipath Delay Amount Measurement Unit 4b) The multipath delay amount measurement unit 4b includes the correlation signals Stag1 to Stag with identification codes.
Based on tagn, the propagation delay times LY1 to LYn of the respective radio waves arriving from the respective base stations B1 to Bn are measured.
That is, the respective propagation delay times LY1 to LYn are measured as follows.

For example, as shown in FIG. 4, when the mobile station MDT is located at an arbitrary point P1 in a certain cell SELj as the user moves, the direct arriving wave S from the base station Bj
Correlation signals Scv as shown in FIG. 5 according to P1 and reflected waves SP2 and SP3 arriving after being reflected by the buildings BL1 and BL2.
When j is generated, for the correlation value of the correlation signal Scvj,
A peak having a correlation value larger than a predetermined threshold value THD for noise component removal is detected. Then, the phase differences τ1 and τ2 up to the peak of the remaining correlation values are measured with reference to the maximum detected correlation value, and these phase differences τ1 and τ2 are set as propagation delay times LYj (τ1, τ2).

In this case, the base station B shown in FIG.
Since the correlation value corresponding to the arriving wave SP4 from j + 2 is smaller than the threshold value THD, the arriving waves SP1, SP1,
Only the peak of the correlation value corresponding to SP2 and SP3 is the correlation signal S
cvj, and two phase differences τ1 and τ2 are obtained.

The identification code data TAGj is added to the propagation delay time LYj to indicate that the propagation delay time LYj has been obtained by the correlation signal Scvj generated based on the despreading code sequence Sbsj for determining the base station Bj. By adding, delay time data DLYj with identification code
(LYj, TAGj) is generated and supplied to the data generation unit 4e.

The mobile station MDT moves to the point P2 in the cell SELj shown in FIG. 4, and the base station Bj, Bj + 1,
Directly arriving waves SP5, SP6, SP8 from Bj + 2 and base station Bj
When the reflected wave SP7 output from +1 and reflected by the building BL3 arrives at the mobile station MDT, the correlation value of the correlation signal Scvj obtained by the correlation operation between the received signal SRXm 'and the despread code sequence Sbsj is calculated. The peak is detected, the phase difference up to the peak of the remaining correlation value is measured based on the maximum correlation value, and the measured phase difference is set as the propagation delay time LYj. Then, by adding the identification code data TAGj to the propagation delay time LYj, the delay time data DL with the identification code is added.
Yj (LYj, TAGj) is generated and supplied to the data generation unit 4e.

In this case, only the correlation value corresponding to the directly arriving wave SP5 from the base station Bj appears, and the base station B2
Since the correlation values corresponding to the arriving waves SP6, SP7, and SP8 from B3 are smaller than the threshold value THD, only one peak of the correlation value appears, and the phase difference (delay time LYj)
Becomes “0”.

Further, the mobile station MDT moves to the point P3 in the cell SELj shown in FIG. 4, and the direct arrival waves SP9 and SP10 from the base stations Bj and Bj + 2 and the output from the base station Bj + 2. Waves SP11, SP reflected by buildings BL4, BL5
When 12 arrives at the mobile station MDT, the received signal SRX
The peak value of the correlation value of the correlation signal Scvj obtained by the correlation operation between m ′ and the despread code sequence Sbsj is detected, and the phase difference up to the peak of the remaining correlation value is measured with the maximum correlation value as a reference. The phase difference is defined as a propagation delay time LYj.
Then, by adding the identification code data TAGj to the propagation delay time LYj, delay time data DLYj (LYj, TAGj) with the identification code is generated, and the data generation unit 4e
To supply.

In this case, the correlation signal Scvj obtained by the correlation operation between the received signal SRXm 'and the despread code sequence Sbsj has one correlation value corresponding to the direct arrival wave SP9 from the base station Bj. And the correlation value corresponding to the incoming waves SP10, SP11, SP12 from the base station Bj + 2 is the threshold value TH.
The value is smaller than D. Therefore, the phase difference (delay time LYj) is “0”.

As described above, the multipath delay amount measuring section 4b detects the peak of the correlation signal Scvj generated based on the despread code sequence Sbsj for determining the radio wave from the base station Bj, and detects the detected correlation value. The propagation delay time LYj for each multipath of the radio wave arriving from the base station Bj is measured based on the phase difference between the peaks. Since the phase difference up to the peak of the remaining correlation value is measured based on the maximum correlation value detected by the peak, the peak of the correlation value is Q
In the case where the number is detected, the propagation delay time LYj of (Q-1) multipaths is obtained.

The suffix j of the propagation delay time LYj is a variable indicating the relevance to each of the base stations B1 to Bn. Therefore, the multipath delay amount measuring unit 4b receives the n identification code-added correlation signals Stag1 from the base station selecting unit 6d.
~ Stagn, the correlation signals Scv1 ~ Sc
vn based on multipath propagation delay times LY1 to LYn
Are measured, and n pieces of propagation delay time data D with identification codes are
LY1 (LY1, TAG1) to DLYn (LYn, TAGn) are supplied to the data generator 4e.

Further, the case where the mobile station MDT moves within the cell SELj will be described as an example.
Has been described, but the mobile station MDT has the cell SEL1
~ SELn, the correlation signals Stag1 ~ Stagn of the correlation signals Stag1 ~ Stagn
Based on SCvn, the propagation delay time LY1
LYn is measured, and n pieces of propagation delay time data with identification codes DLY1 (LY1, TAG1) to DLYn (LYn, TA
Gn) and supplies it to the data generation unit 4e.

As described above, the multipath delay amount measuring section 4b of the present embodiment, as schematically shown in FIG.
The multipath delay times LY1 to LYn are sequentially measured with all the correlation signals Scv1 to Scvn of the correlation signals with identification codes Stag1 to Sttagn as measurement targets.

However, the multipath delay amount measuring section 4b
7B, one correlation signal Scvk satisfying a predetermined condition is extracted from among n correlation signals Scv1 to Scvn supplied as shown in FIG. 7B, and the extracted correlation signal Scvk is extracted. May be used as a measurement target to measure the propagation delay time LYk of the multipath, and to provide the propagation delay time data DLYk (LYk, TAGk) with the identification code to the data generation unit 4e.

That is, the correlation signals Scv1 to Scvn are despread code sequences Sbs1 for discriminating the respective base stations B1 to Bn.
... Sbsn and the received signal SRXm ′.

For this reason, when the mobile station MDT has a certain cell SEL
If the cell is located anywhere within k, the cell S
The correlation signal Scvk obtained corresponding to the radio wave arriving from the base station Bk disposed in the ELk has a larger correlation value than other correlation signals (correlation signals excluding Scvk among Scv1 to Scvn). That is, the correlation signal Scvk is the signal that most accurately indicates the multipath, and the other correlation signals have little meaning as a measurement target as the multipath.

Therefore, as shown in FIG. 7B, only the correlation signal Scvk having the largest correlation value among the n correlation signals Scv1 to Scvn is extracted, and the extracted correlation signal Sc is extracted.
The multipath propagation delay time LYk is measured based on vk, and the measured propagation delay time LYk is added to the base station Bk
With the identification code data TAGk indicating the relationship with the ID, and the propagation delay time data with identification code DLYk (LYk, TAG)
k) may be supplied to the data generator 4e.

According to this modification, the mobile station MDT has the SE
When the mobile station MDT is located at an arbitrary place in SEL2, the multipath propagation delay time LY1 of the multipath of the arriving radio wave from the base station B1 is supplied to the data generator 4e. The multipath propagation delay time LY2 of the radio wave arriving from the base station B2 is calculated by the data generation unit 4.
e, and similarly, when the mobile station MDT is located at an arbitrary position within SELn, the multipath propagation delay time LYn of the radio wave arriving from the base station Bn is supplied to the data generation unit 4e. Therefore, the number of the propagation delay time data with the identification code supplied to the data generation unit 4e can be reduced.

Further, since the mobile station MDT eliminates the incoming radio wave from the mobile station in the cell where the mobile station is not actually located, only the particularly significant propagation delay time data DLY1 to DLYn with the identification code is removed. It can be supplied to the data generator 4e.

The configuration of the multipath delay amount measuring section 4b is such that all of the correlation signals Scv1 to Scvn are to be measured and the propagation delay time data DLY1 to DLYn with the identification code are supplied to the data generating section 4e. Whether the configuration is such that only the correlation signal that satisfies the predetermined condition among the correlation signals Scv1 to Scvn is to be measured and the propagation delay time data DLY1 to DLYn with the identification code is supplied to the data generation unit 4e as in the above modification. Can be appropriately selected according to design specifications and the like. (Multipath electric field strength measuring section 4c) The multipath electric field strength measuring section 4c is provided with the identification code-added correlation signals Stag1 to Stagn.
, The electric field strengths EM1 to EMn of the radio waves arriving from the respective base stations B1 to Bn for each multipath are measured. That is, the respective electric field strengths EM1 to EMn are measured as follows.

For example, as shown in FIG. 4, when the mobile station MDT is located at an arbitrary point P1 in a certain cell SELj as the user moves, the direct arriving wave S from the base station Bj
Correlation signals Scv as shown in FIG. 5 according to P1 and reflected waves SP2 and SP3 arriving after being reflected by the buildings BL1 and BL2.
When j is generated, for the correlation value of the correlation signal Scvj,
A peak having a correlation value larger than a predetermined threshold value THD for noise component removal is detected.

The peak of the remaining correlation values is normalized using the maximum detected correlation value as the reference value “1”, and these normalized correlation values (peak values) are used as the electric field strength for each multipath.

In this case, the base station B shown in FIG.
Since the correlation value corresponding to the arriving wave SP4 from j + 2 is smaller than the threshold value THD, the arriving waves SP1, SP1,
Only the peak of the correlation value corresponding to SP2 and SP3 is the correlation signal S
will appear in cvj. Then, the correlation value corresponding to the remaining radio waves SP2 and SP3 is set to "0. 0" by normalizing the maximum correlation value generated corresponding to the arriving wave SP1 as the reference value "1".
7 ”and“ 0.5 ”, and these three normalized correlation values“ 1 ”,“ 0.7 ”and“ 0.5 ”are used as the electric field intensity EMj (1, 0.7, 0.5) of each multipath. And

Then, in order to show that the electric field strength for each multipath has been obtained by the correlation signal Scvj generated based on the despread code sequence Sbsj for determining the base station Bj, the identification code data TAGj is added to the electric field strength EMj. To generate multi-path electric field intensity data DEMj (EMj, TAGj) with an identification code,
To supply.

Also, as shown in FIG.
Is also located at another point P1 or P2 in the cell SELj, similarly, the normalized electric field strength for each multipath is obtained,
By adding the identification code data TAGj to the obtained electric field intensity EMj, the multi-path electric field intensity data DEMj (EMj, TAGj) with the identification code is added to the data generation unit 4.
e.

As described above, the multipath delay amount measuring unit 4b detects the peak of the correlation signal Scvj generated based on the despread code sequence Sbsj for determining the radio wave from the base station Bj, and detects the detected correlation value. Is measured as the electric field strength for each multipath.

The suffix j of the electric field strength EMj
Is a variable indicating the association with each of the base stations B1 to Bn.
Therefore, the multipath electric field strength measuring section 4c transmits the n identification code-added correlation signals Stag1 to Sta from the base station selecting section 6d.
In response to the supply of gn, the electric field strengths EM1 to EMn for each multipath are measured based on the correlation signals Scv1 to Scvn, and the multipath electric field strength data D with n identification codes are measured.
EM1 (EM1, TAG1) to DEMn (EMn, TAGn) are supplied to the data generator 4e.

Further, a case where the mobile station MDT moves within the cell SELj will be exemplified, and the multipath delay amount measuring section 4b will be described.
Has been described, but the mobile station MDT has the cell SEL1
~ SELn, the correlation signals Stag1 ~ Stagn of the correlation signals Stag1 ~ Stagn
The electric field strengths EM1 to EMn are measured based on Scvn, and n
Multi-path field strength data DEM1 with identification codes
(EM1, TAG1) to DEMn (EMn, TAGn) are supplied to the data generation unit 4e.

As described above, the multipath electric field strength measuring section 4c of this embodiment measures all the correlation signals Scv1 to Scvn of the correlation signals with identification codes Stag1 to Stagn, as schematically shown in FIG. As an object, the electric field strengths EM1 to EMn for each multipath are sequentially measured.

However, as a modified example of the multipath electric field strength measuring section 4c, as shown in FIG. 8 (b), one correlation signal Scv1 to Scvn supplied by n pieces, which satisfies a predetermined condition, is satisfied. The signal Scvk is extracted, and the extracted correlation signal Scvk is used as a measurement target to obtain the electric field intensity E for each multipath.
A configuration may be adopted in which Mk is measured and supplied to the data generation unit 4e as multi-path electric field intensity data DEMk (EMk, TAGk) with an identification code.

That is, the correlation signals Scv1 to Scvn are despread code sequences Sbs1 for discriminating the respective base stations B1 to Bn.
... Sbsn and the received signal SRXm ′.

For this reason, when the mobile station MDT has a certain cell SEL
If the cell is located anywhere within k, the cell S
The correlation signal Scvk obtained corresponding to the radio wave arriving from the base station Bk disposed in the ELk has a larger correlation value than other correlation signals (correlation signals excluding Scvk among Scv1 to Scvn).

That is, the correlation signal Scvk is a signal that most accurately indicates the electric field strength of the multipath, and the other correlation signals have little meaning as a target for measuring the electric field strength of the multipath.

Accordingly, as shown in FIG. 8B, only the correlation signal Scvk having the largest correlation value among the n correlation signals Scv1 to Scvn is extracted, and the extracted correlation signal Sc is extracted.
Based on vk, the electric field intensity EMk for each multipath of the arriving wave from the base station Bk is measured, and the multipath electric field intensity data DEMk with the identification code added with the identification code data TAGk indicating the relevance to the base station Bk (EMk, TAGk) may be supplied to the data generator 4e.

According to this modification, the multipath field strength data DE with the identification code supplied to the data generation unit 4e is provided.
The number of M1 to DEMn can be reduced. Furthermore, since the mobile station MDT eliminates the incoming radio wave from the mobile station in the cell where the mobile station is not actually located, the multipath field strength data DEM1 with each identification code that is particularly significant.
.About.DEMn can be supplied to the data generation unit 4e.

The configuration of the multipath electric field strength measuring section 4c is determined by using the multipath electric field strength data DEM1 to DEM with identification code for all the correlation signals Scv1 to Scvn.
n to the data generation unit 4e, or, as in the above-described modified example, only the correlation signals satisfying the above-mentioned predetermined condition from among the correlation signals Scv1 to Scvn are measured as multi-path electric field strength data with identification codes. Whether to supply DEM1 to DEMn to the data generation unit 4e can be appropriately selected according to design specifications and the like. (Base station electric field strength measuring section 4d) Base station electric field strength measuring section 4
d measures the electric field strengths EB1 to EBn of the radio waves arriving from the respective base stations B1 to Bn for each base station based on the correlation signals Stag1 to Stagn with the identification code.
Base station electric field strength em1 ~
emn, and further supplies the data generation unit 4e as base station electric field strength data DEB (em1 to emn) that summarizes the base station electric field strengths em1 to emn.

That is, as schematically shown in FIG. 9, every n correlation signals Scv supplied from the base station selector 6d.
1 to Scvn are respectively compared with a threshold value THD, and a correlation value having a value larger than the threshold value THD is extracted, and the correlation signals Scv1 to Scvn are extracted.
Integrate every time. Then, the obtained integrated values are used to calculate the electric field strengths EB1 to EBn of the radio waves arriving from the respective base stations B1 to Bn.
And

Further, the largest value (that is, the maximum integrated value) is extracted from the electric field strengths EB1 to EBn, and the extracted maximum integrated value is set to “1” to normalize the remaining integrated values, thereby obtaining each value. Base station electric field strengths em1 to emn, which indicate the ratio of electric field strengths of radio waves arriving from the base stations B1 to Bn, are obtained. Then, the base station electric field strengths em1 to emn are collectively supplied to the data generation unit 4e as base station electric field strength data DEB (em1 to emn).

For example, as shown in FIG. 4, when the mobile station MDT is located at an arbitrary point P1 in a certain cell SELj as the user moves, the radio wave SP1 from the base station Bj and the building BL1 , BL2, the reflected waves SP2 and SP3 arrive at the base station electric field strength measuring section 4d. The n correlation signals Scv1 to Scvn generated by the correlation are supplied to the base station electric field strength measuring unit 4d.

In this case, the base station Bj + 2 shown in FIG.
The correlation value corresponding to the arriving wave SP4 from the base station B is smaller than the threshold value THD, and therefore, as shown in FIG.
Correlation values corresponding to the incoming waves SP1, SP2, SP3 from j appear in the correlation signal Scvj. Therefore, the base station electric field strength measuring section 4d integrates the correlation value larger than the threshold value THD as described above, thereby obtaining the total electric field strength (base station electric field strength) EB of the incoming waves SP1, SP2, SP3 from the base station Bj.
j is the largest value, and the base station field strength of the radio wave arriving from another base station other than the base station Bj is an extremely small value.

Therefore, the base station electric field strength data DEB
(Em1 to emn) indicates that the mobile station MDT is located in the cell SELj that receives the incoming wave from the base station Bj most strongly.

The processing function of the base station electric field strength measuring unit 4d has been described by exemplifying a case where the mobile station MDT moves within the cell SELj.
No matter in which cell range Ln, the base station electric field intensity EB for each of the base stations B1 to Bn based on the correlation signals Scv1 to Scvn of the correlation signals Stag1 to Sttag with identification codes.
1 to EBn, and base station electric field intensity data DEB (e
m1 to emn) and supplies the data to the data generator 4e. Therefore, the base station field strength data DEB
In (em1 to emn), the electric field strength of the radio wave arriving from the base station in the cell where the mobile station MDT is actually located becomes the largest value. (Data Generation Unit 4e) The data generation unit 4e includes the multi-path number data DMP1 (MP1, TAG1) to DMPn (MP) with the identification code supplied from the multi-path number measurement unit 4a.
n, TAGn) and the propagation delay time data DLY1 with the identification code supplied from the multipath delay amount measurement unit 4b.
(LY1, ATG1) to DLYn (LYn, ATGn), and multipath field strength data DEM1 (EM1, ATG1) with identification code supplied from the multipath field strength measurement unit 4c.
To DEMn (EMn, ATGn) and the base station field strength data DEB (em
1 to emn), and by adding identification code data (telephone number etc.) Did of the mobile station MDT, reception status data Dcnd (DMP1 to DMPn, DLY1 to DLYn, DEM1 to DEMn, D
EB, Did) is generated and supplied to the transmission unit 5.

When receiving state data Dcnd is supplied, transmitting section 5 performs narrow band modulation on receiving state data Dcnd by primary modulation circuit 5a and passes through narrow band pass filter 5b to convert primary modulated signal Smd. Then, the primary modulation signal Smd is multiplied (spread) by the spreading code sequence Sme from the spreading code sequence generator 5c by the spreading circuit 5c as a correlator.
The transmission signal STXm is generated by passing the spread signal Smf generated by the product through the wideband bandpass filter 5e, and transmitted to the base station via the transmission / reception antenna 1.

As described above, the mobile station MDT has multipath number data DMP1 indicating the characteristics of the reception status of radio waves arriving from the base stations B1 to Bn at the current position in the communication area.
To DMPn and propagation delay time data DLY1 to DLYn
And multi-pass electric field strength data DEM1 to DEMn;
Base station electric field strength data DEB is obtained, and these data are used as reception status data Dcnd (DMP1 to DMPn, DLY1 to DLYn, D
EM1 to DEMn, DEB, Did) and send them to the base station.

Next, based on FIG. 3, each of the base stations B1 to B
The configuration of the position detection processing unit BDT provided for n will be described.

The position detection processing unit BDT includes a receiving antenna 7 for receiving radio waves from the mobile station MDT, a receiving unit 8, a data processing unit / system controller 9, a position determining unit 10,
Transmission data generation unit 11, database 12, transmission unit 1
3 and a transmission antenna 14.

The receiving unit 8 generates a reception signal SRXb ′ in which interference from an unnecessary frequency band is prevented by passing the reception signal SRXb supplied from the reception antenna 7 through a wideband bandpass filter 8a, and generates an inverse signal as a correlator. The spreading circuit 8b multiplies (despreads) the received signal SRXb 'by the despread code sequence Sba from the despread code sequence generator 8c. Then, the despread signal Sbb generated by the product is returned to the primary modulation signal Sbc by passing through the narrow band-pass filter 8d.
Further, the primary modulation signal Sbc is passed through a detection circuit 8e to reproduce a baseband waveform detection signal, and the demodulation circuit 8f demodulates the detection signal, thereby reproducing data DRXb transmitted from the mobile station MDT. I do. That is, the reception status data Dcnd (DMP) transmitted from the mobile station MDT.
1 to DMPn, DLY1 to DLYn, DEM1 to DEMn, DEB, and Did) are reproduced as data DRXb.

Data processing unit / system controller 9
Is provided with a microprocessor (MPU), controls the operation of the entire position detection processing unit BDT, and also reproduces the reproduced reception status data Dcnd (DMP1 to DMPn, DLY1 to DLY).
LYn, DEM1 to DEMn, DEB, Did).

The database 12 stores the position data storage unit 1
2a and a provision data storage unit 12b.

Here, in the position data storage unit 12a, the operator of the mobile communication system stores each of the cells SEL1 to SEL.
The mobile station MDT is actually moved to various points within n, and the data of the measured multipath number, multipath propagation delay time, multipath electric field intensity and base station electric field intensity, and the latitude and Data representing longitude (hereafter,
“Latitude and longitude data DRxy”) are shown in FIGS.
As shown in FIG. 7, the data is stored in a database as reference data.

That is, reference data on various points in the cell SEL1 shown in FIG.
Various points R11, R12, R13-R1i in cell SEL1
As shown in FIG. 11, the latitude / longitude data DRxy is stored in a database in association with the cell SEL1 and each of the points R11 to R1i.

The data of the number of multipaths actually measured by moving the mobile station MDT to each of the points R11 to R1i is, as shown in FIG. 12, the cell SEL1 and the base stations B1 to Bn.
Are stored in association with each other.

As shown in FIG. 13, the data of the multipath delay time actually measured by actually moving the mobile station MDT to each of the points R11 to R1i is, as shown in FIG.
To Bn.

As shown in FIG. 14, the data of the multipath electric field strength measured by actually moving the mobile station MDT to each of the points R11 to R1i is, as shown in FIG.
To Bn.

Further, the data of the base station electric field intensity measured by actually moving the mobile station MDT to each of the points R11 to R1i is as follows:
As shown in FIG. 15, the cell SEL1 and each of the base stations B1 to B
n is stored in association with n.

Then, the latitude / longitude data DRxy of various points in the other cells SEL2 to SELn, the data of the number of multipaths actually measured by actually moving the mobile station MDT to each point, and the data of the multipath delay time are obtained. Similarly, the multipath electric field intensity data and the base station electric field intensity data are shown in FIG.
As shown in FIGS. 1 to 15, the information is stored in association with each cell SEL2 to SELn and each base station B1 to Bn.

The providing data storage unit 12b stores in advance the map data and the like indicating the geography of each point and its surroundings stored in the position data storage unit 12a. That is, the place name and address of each point in the cells SEL1 to SELn,
Data useful for the user, such as map data including information on public facilities, commercial facilities, road networks, etc., located around each point is stored.

The position judging unit 10 receives the data DRXb reproduced by the receiving unit 8, that is, the reception status data Dcnd (DMP1
~ DMPn, DLY1 ~ DLYn, DEM1 ~ DEMn, DEB).
Then, the position data storage unit 12 shown in FIGS.
a is searched for reference data in each of the data DMP1 to DMP
n, DLY1 to DLYn, DEM1 to DEMn, DEB
Is determined, and the latitude / longitude data DRxy corresponding to the determination result is retrieved from the database shown in FIG.

The reference data retrieved from the position data storage section 12a and the received data DMP1 to DM
Pn, DLY1 to DLYn, DEM1 to DEMn, DE
The correlation with B is determined, and the latitude / longitude data DRxy is determined based on the reference data with the maximum correlation value.

That is, reference data is sequentially retrieved from the databases shown in FIGS. 12 to 15, and the received multipath number data DMP1 to DMPn and the multipath numbers already stored in the multipath number database shown in FIG. A correlation calculation with the number of paths data, a correlation calculation between the received multipath delay time data DLY1 to DLYn and the multipath delay time data already stored in the multipath delay time database shown in FIG. Correlation calculation between the path electric field intensity data DEM1 to DEMn and the multipath electric field intensity data already stored in the multipath electric field intensity database shown in FIG. 14, the received base station electric field intensity data DEB and the base station shown in FIG. Correlation calculation with base station field strength data already stored in the station field strength database The calculated correlation values respectively determined to result determining cell and the point at which the maximum value. Then, the latitude and longitude data DRxy corresponding to the determined cell and the point are searched from the latitude and longitude database of FIG.
This is supplied to the transmission data generation unit 11.

The transmission data generation unit 11
From the provided data storage unit 12b based on the latitude and longitude data DRxy supplied from the provided data storage unit 12b, and combines the searched map data with the latitude and longitude data DRxy for transmission. Data D
TXb is generated and supplied to the transmission unit 13.

The transmission section 13 converts the transmission data DTXb into a W-C
The signal is converted into a transmission signal STXb of the DMA system, and the transmission antenna 1
4 to the mobile station MDT.

When transmission signal STXb is transmitted to mobile station MDT in this way, receiving section 2 in mobile station MDT shown in FIG.
Input the transmission signal STXb as the reception signal SRXm, generate the reproduction data DRXm, and perform various data processing by the data processing unit / system controller 3, thereby providing useful information to the user. For example, a map is displayed on a display (not shown) provided in the mobile station MDT based on the map data, and the current position of the mobile station MDT is displayed on the displayed map based on the latitude / longitude data DRxy. Is displayed with a good mark. This allows
A user who owns the mobile station MDT can easily know his / her current position only by looking at the map, the mark, and the like displayed on the display. Therefore, the mobile communication system exhibits a so-called navigation function for providing a user who owns the mobile station MDT with geographical information on the current position and its surroundings.

Next, the position detection operation of the mobile communication system having such a configuration will be described with reference to the flowchart of FIG. The flow on the left side in FIG.
T, the flow on the right side shows the operation of the base stations B1 to Bn.

In FIG. 16, mobile station MDT receives incoming radio waves from base stations B1 to Bn (step S10).
0), steps S102 to S1 based on the received radio wave.
08, the multipath number data DMP1
To DMPn and multipath delay time data DLY1 to DLY1 to DMPn
LYn and multipath electric field intensity data DEM1 to DEM
n and base station field strength data DEB. Then, these data DMP1 to DMPn, DLY1 to DLY
LYn, DEM1 to DEMn and DEB are combined to generate reception status data Dcnd and transmit it to the base station (step S110).

On the other hand, of the base stations B1 to Bn, the position detection processing unit BDT of the base station that has received the reception status data Dcnd.
Reproduces the reception status data Dcnd (step S20).
0), search the reference data in the database 12 and determine the reference data most similar to the reception status data Dcnd;
Latitude and longitude data DR corresponding to the determined reference data
xy is acquired (step S202). Then, the transmission data DTXb including the latitude / longitude data DRxy and the map data, etc.
Is generated and transmitted to the mobile station MDT (step S20).
4).

Next, the mobile station MDT transmits the transmission data DTXb.
Is received and reproduced (step S112), and the transmission data D
Processing such as displaying latitude and longitude data DRxy and map data included in TXb on a display is provided to the user (step S114). Thereby, the mobile station MD
T owns the map data and the latitude / longitude data D
The user can easily know his / her current position only by looking at the display based on Rxy. Then, by repeating the processing from step S100, the mobile station MD
The current position of T is provided to the user every moment.

In step S114, the base station transmits (distributes) the map data to the mobile station MDT.
In doing so, the base station may collect a fixed distribution fee from the user.

As described above, according to the mobile communication system of the present embodiment, the multipath number data DM is obtained from the radio waves from the base stations B1 to Bn arriving at the moving point of the mobile station MDT.
P1 to DMPn and multipath delay time data DLY1
To DLYn and multipath electric field intensity data DEM1 to DEM1 to DLYn
Since EMn and base station electric field strength data DEB are obtained and the latitude and longitude of the moving point of the mobile station MDT are determined based on these data, extremely high-precision position detection is enabled. In particular, the mobile station MDT is determined by determining the latitude and longitude of the moving point based on the number of multipaths and the multipath delay time.
Can accurately detect the current position of the mobile communication system, thereby realizing a mobile communication system capable of responding to a diversified mobile communication environment, for example, a diversified business model.

In the present embodiment described above, the mobile station MD based on all data of the number of multipaths, the multipath delay time, the multipath electric field intensity, and the base station electric field intensity.
Although the moving point of T is detected, the current position of the mobile station MDT can be accurately detected without any practical problem without relying on all the information.

That is, step S104 in FIG.
Steps S106 and S108 are omitted, and step S102
The reception status data Dcnd including only the multipath number data DMP1 to DMPn obtained in step S110 may be transmitted to the base station in step S110 to detect the current position of the mobile station MDT.

According to such a configuration, when the mobile station MDT is located at a certain point in an arbitrary cell SELk,
The despreading circuit 6b in the cell search unit 6 shown in FIG. 1 uses the received signal SRXm 'and the despreading code sequence Sbs1 to Sbs for base station discrimination.
By performing a correlation operation with bsn, a correlation signal Scvk corresponding to an incoming radio wave from the base station Bk disposed in the cell SELk is obtained.
Is the largest correlation value, and accurately indicates the position of the mobile station MDT. Therefore, the correlation signal Scvk
By transmitting the multipath number MPk measured by the multipath number measurement unit 4a to the base station on the basis of the multipath number measurement unit 4a, and referring to the multipath number database of FIG. 12 stored in the base station database 4e, the mobile station The current position of the MDT can be detected accurately and precisely.

Steps S104, S106, S1
Since the processing of step 08 is omitted, the multi-path delay amount measuring unit 4b, the multi-path electric field intensity measuring unit 4c and the base station electric field intensity measuring unit 4d do not need to be provided.
The configuration of the DT can be simplified.

Further, steps S102 and S1 in FIG.
06, the processing of S108 is omitted, the reception status data Dcnd including only the multipath delay time data DLY1 to DLYn obtained in step S104 is transmitted to the base station side in step S110, and the current position of the mobile station MDT is detected. It may be configured.

According to this configuration, when the mobile station MDT is located at a certain point in an arbitrary cell SELk,
The despreading circuit 6b in the cell search unit 6 shown in FIG. 1 uses the received signal SRXm 'and the despreading code sequence Sbs1 to Sbs for base station discrimination.
By performing a correlation operation with bsn, a correlation signal Scvk corresponding to an incoming radio wave from the base station Bk disposed in the cell SELk is obtained.
Is the largest correlation value, and accurately indicates the position of the mobile station MDT. Therefore, the correlation signal Scvk
By transmitting the multipath delay time LYk measured by the multipath delay amount measurement unit 4b to the base station based on the multipath delay amount measurement unit 4b, and referring to the multipath number database of FIG. The current position of the mobile station MDT can be detected accurately and precisely.

Steps S102, S106, S1
Since the step 08 is omitted, it is not necessary to provide the multipath quantity measuring unit 4a, the multipath electric field intensity measuring unit 4c and the base station electric field intensity measuring unit 4d, so that the configuration of the mobile station MDT is simplified. Can be.

To detect the moving point of the mobile station MDT, one of the number of multipaths or the multipath delay time is used as main data, and the data of the multipath electric field strength and the base station electric field strength are used as auxiliary data to provide the mobile station MDT. May be detected.

As described above, only one of the number of multipaths or the multipath delay time is used for detecting the position of the mobile station MDT, or the information on the multipath electric field strength and the base station electric field strength is used as auxiliary data to determine the position of the mobile station MDT. With the configuration for detection, it is possible to simplify the configuration of the position analysis unit 4 in the mobile station MDT and to reduce the storage capacity of the database 12 in the position detection processing unit BDT on the base station side. Become.

In this embodiment, the map data is stored in advance in the provided data storage unit 12b in the position detection processing unit BDT on the base station side, and the map data is combined with the latitude / longitude data DRxy. It is configured to transmit (distribute) to the mobile station MDT side.

However, the above-mentioned map data is stored in the mobile station MDT.
Is stored in a predetermined storage unit (not shown) in the data processing unit / system controller 3 in advance, and when the latitude / longitude data DRxy is transmitted from the position detection processing unit BDT,
Data processing unit / system controller 3 of mobile station MDT
May retrieve map data related to the latitude / longitude data DRxy from the storage unit, and display the retrieved map data and the latitude / longitude data DRxy on the display (not shown).

As a method of previously storing the above-mentioned map data in a predetermined storage unit in the data processing unit / system controller 3 of the mobile station MDT, a method of storing the map data in the C
An information recording medium such as D or DVD may be provided to the user, and map data of the information recording medium may be downloaded to the data processing unit / system controller 3 of the mobile station MDT. In addition to the latitude / longitude data DRxy, the position detection processing unit BDT
Only the map data stored in advance in the provided data storage unit 12b may be transmitted (distributed) to the mobile station MDT side and downloaded to the data processing unit / system controller 3.

In this embodiment, the position data storage section 12a and the position determination section 10 are provided in the position detection processing section BDT on the base station side as shown in FIG. 12a and the position determination unit 10 may be provided in the mobile station MDT shown in FIG. 2, and the latitude / longitude data DRxy determined by the position determination unit 10 may be transmitted to the position detection processing unit BDT on the base station side. . Then, the transmission data generation unit 11 in the position detection processing unit BDT that has received the latitude / longitude data DRxy acquires map data corresponding to the latitude / longitude data DRxy from the providing data storage unit 12b in the database 12, and obtains the map data. The transmission data DTXb
May be returned to the mobile station MDT side.

In this configuration, since the mobile station MDT itself determines the current position, the latitude / longitude data DRxy is transmitted to the position detection processing unit BDT of the base station only when the user wants to obtain the map data. You may make it.
When transmitting (distributing) map data from the base station to the mobile station MDT, the base station may collect a fixed distribution fee from the user.

As described above, the configurations of the mobile station MDT and the position detection processing unit BDT shown in FIGS. 2 and 3 are appropriately distributed and provided between the mobile station MDT and the base station according to the design specifications and the like. It may be. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. Note that FIG.
Is a block diagram showing the configuration of the mobile station MDT of the present embodiment, and the same or corresponding parts as those in FIG. 2 are denoted by the same reference numerals. FIG. 18 shows each of the base stations B1 to B1 of the present embodiment.
FIG. 4 is a block diagram illustrating a configuration of a position detection processing unit BDT provided in Bn, and portions that are the same as or correspond to those in FIG. 3 are denoted by the same reference numerals.

In FIG. 17, the mobile station MDT is provided with a moving speed measuring unit 4f in addition to the configuration of the position analyzing unit 4 shown in FIG.

The moving speed measuring section 4f inputs the data of the electric field strengths EB1 to EBn of the radio waves arriving from the respective base stations B1 to Bn generated by the base station electric field strength measuring section 4d. That is, the electric field strengths EB1 to EB before the normalization processing is performed
Input n data.

As shown in FIG. 19, data EBmax of the largest electric field intensity is extracted from these electric field intensities EB1 to EBn every predetermined period Tn in which n electric field intensities EB1 to EBn are generated. . Further, the change of the data EBmax obtained for each period Tn is compared with a predetermined threshold value THDEB, and the data EBmax is set within a period g × Tn that is an integral multiple of the period Tn.
The number NEB at which max crosses the threshold value THDEB is obtained, and the reciprocal of the number NEB is calculated as the moving speed V (= 1 / NEB) of the mobile station MDT.
And Then, the speed data Dsp indicating the measured moving speed V is supplied to the data generator 4e.

The data generation unit 4e includes the speed data Dsp from the moving speed measurement unit 4f and the multipath number data DMP1 with identification code from the multipath number measurement unit 4a.
(MP1, TAG1) to DMPn (MPn, TAGn) and the propagation delay time data DLY1 (LY1, ATG1) to DLYn with the identification code from the multipath delay amount measuring unit 4b.
(LYn, ATGn) and multipath field strength data DEM1 with identification code from the multipath field strength measurement unit 4c.
(EM1, ATG1) to DEMn (EMn, ATGn) and the base station field strength data DE from the base station field strength measuring unit 4d.
B (em1 to emn) together with the feature data (DMP1 to DMP)
n, DLY1 to DLYn, DEM1 to DEMn, DEB, and Dsp), and further adds identification data (telephone number and the like) Did of the mobile station MDT to the feature data to obtain reception status data Dcnd (DMP1 to DMPn). , DLY1-DLYn, DEM1-DEMn, DEB, Ds
p, Did) is generated and supplied to the transmission unit 5 to be transmitted to the base station side.

Next, the position detection processing unit BDT shown in FIG.
Is provided with an optimum candidate determination unit 15 in addition to the configuration shown in FIG.

Here, the position judging unit 10 outputs the data DRXb reproduced by the receiving unit 8, that is, the reception status data Dcnd (DMP1 to DMPn, DLY1 to DLY) transmitted from the mobile station MDT.
n, DEM1 to DEMn, DEB, Dsp, Did), search the reference data in the position data storage unit 12a shown in FIGS. 12 to 15, and obtain the feature data DMP1 to DMPn, DLY1 to DLY1.
A plurality of reference data similar to DLYn, DEM1 to DEMn, DEB are determined, and a plurality of latitude / longitude data DRxy corresponding to the determination result are supplied to the optimum candidate determination unit 15.

Further, the speed data Dsp in the reception status data Dcnd is transferred to the optimum candidate judging unit 15 together with the latitude / longitude data DRxy.

It should be noted that the above feature data DMP1 to DMP
n, DLY1 to DLYn, DEM1 to DEMn, DEB
When determining a plurality of reference data similar to the above, the feature data DMP1 to DMPn, DLY1 to DLYn, DE
Even if reference data in which only some of the data M1 to DEMn and DEB are similar, a relatively gradual determination as a determination target is performed, and a plurality of latitude / longitude data DRxy corresponding to the determination result is obtained. It is supplied to the optimum candidate determination unit 15. Also, the feature data DMP1 to DMPn, DLY
1 to DLYn, DEM1 to DEMn, and DEB are correlated with the reference data, and it is determined that the reference data having a correlation value equal to or greater than a predetermined value are similar.

Further, the position judging section 10 does not input the reception status data Dcnd sent from the mobile station MDT only once to judge the plurality of latitude / longitude data DRxy, but the mobile station MDT side. , Receiving condition data Dcnd sent for a certain period of time is input a plurality of times, and characteristic data DMP1 to DMPn and DLY1 to DLY obtained each time are input.
A plurality of reference data similar to n, DEM1 to DEMn, and DEB are determined, and a plurality of latitude / longitude data DRxy corresponding to the determination result are supplied to the optimum candidate determination unit 15. In this embodiment, the reception status data Dcnd is input three times.

Therefore, each time the position determination unit 10 receives the reception status data Dcnd, the position determination unit 10 outputs a plurality of pieces of latitude / longitude data Dcnd.
Rxy is determined and supplied to the optimal candidate determining unit 15.

The optimal candidate judging section 15 is provided with a plurality of pieces of latitude / longitude data D supplied from the position judging section 10 a plurality of times.
Based on Rxy, optimum position data MRxy indicating the current position of the mobile station MDT is generated.

The algorithm for generating the optimum position data MRxy will be described with reference to a specific example. For example, the first plurality of latitude / longitude data DRxy supplied from the position judging unit 10 are PS11 to PS13 and the second latitude / longitude data DRxy. Longitude data D
Rxy is PS21 to PS23, the third latitude / longitude data DR
Assuming that xy is PS31 to PS33, these latitude / longitude data PS11 to PS11 are placed on the latitude / longitude coordinates shown in FIG.
13, PS21 to PS23, and PS31 to PS33 are arranged, respectively, and the number of occurrences of the same is cumulatively added, and the center of gravity (latitude and longitude) having the largest value in the averaged distribution obtained by cumulative addition is moved. It is determined to be a strong candidate MRxy 'representing the current position of the station MDT.

Further, the value of the speed data Dsp is set to a predetermined threshold value T.
When the speed data Dsp having a value greater than the threshold value THDsp is obtained as compared with HDsp, the candidate MRxy ′ is set to the mobile station M.
It is determined that the current position of the DT is indicated, and the candidate M
Rxy 'as the optimum position data MRxy (= MRxy')
This is supplied to the transmission data generation unit 11.

On the other hand, when the speed data Dsp having a value larger than the threshold value THDsp cannot be obtained, the optimum position data MRxy obtained in the previous processing is used as the optimum position data MRxy.
The data is supplied to the transmission data generator 11 as xy.

When the optimum position data MRxy is supplied, the transmission data generation unit 11 searches the provided data storage unit 12b for map data corresponding to the optimum position data MRxy, and searches the map data and the optimum position data. The transmission unit 1 generates transmission data DTXb by combining with MRxy.
Supply to 3. Then, the mobile station MD is transmitted via the transmission unit 13.
It is transmitted to the T side.

Thus, the transmission data DTXb is transmitted to the mobile station MD.
When transmitted to T, the reception unit 2 in the mobile station MDT shown in FIG. 17 reproduces the transmission data DTXb as the reception data DRXm, and the data processing unit / system controller 3 performs various data processing to use the data. Provide useful information to people. For example, a map is displayed on a display (not shown) provided in the mobile station MDT based on the map data, and the optimum position data M is displayed on the displayed map.
Based on Rxy, the current position of the mobile station MDT is displayed as a mark with good visibility. As a result, a so-called navigation function for providing the current position and the geographic information around the current position is exhibited, and for the user who owns the mobile station MDT,
The user can easily know his / her current position only by looking at the map, the mark, and the like displayed on the display.

As described above, according to the present embodiment, as described above, the optimum candidate determination unit 15 in the position detection processing unit BDT provided in each of the base stations B1 to Bn uses the plurality of pieces of latitude / longitude data Rxy as described above. The optimum frequency data MRxy indicating the current position of the mobile station MDT is generated based on the frequency of occurrence of the mobile station MDT.
The current position of the mobile station MDT can be detected with high accuracy.

Further, in a multiple access communication such as W-CDMA, even if the distance from the base station to the mobile station is the same,
The electric field strength of the arriving radio wave remarkably changes due to the effects of fading or the like. Generally, when the moving speed of the base station is low, the electric field strength varies greatly. However, in the present embodiment, as described above, the moving speed V
When the speed data Dsp indicating the moving speed V exceeds a predetermined threshold value THDsp, it is determined that the optimum position data MRxy is data indicating the current position of the mobile station MDT. The current position of the MDT can be detected with extremely high accuracy.

In this embodiment, the position detection processing unit BD
T is the data DMP1 to DM in the reception status data Dcnd.
Pn, DLY1 to DLYn, DEM1 to DEMn, DE
B, the similarity to the reference data in the position data storage unit 12a shown in FIGS. 12 to 15 is to be examined. These data DMP1 to DMPn, DLY1 to
By examining the similarity between one of the data DLYn, DEM1 to DEMn, and DEB, and a combination of the data and the reference data in the position data storage unit 12a, the candidate MRxy ′ for the latitude / longitude data is obtained. Is also good.

As shown in FIG. 17, moving speed measuring section 4f moves based on data of electric field strengths EB1 to EBn before normalization processing generated by base station electric field strength measuring section 4d. Although the speed data Dsp indicating the moving speed V of the station MDT is generated, the present invention is not limited to this, and the moving speed measuring unit 4f uses the correlation signal generated by the cell search unit 6 by the correlation operation. Scv1 ~
The speed data Dsp indicating the moving speed V of the mobile station MDT may be generated based on Scvn.

In the mobile communication system described with reference to FIGS. 17 to 20, the position detection processing section B
The DT side includes a position determination unit 10, a database 12, and an optimum candidate determination unit 15, and the position detection processing unit BDT determines the position of the mobile station MDT. However, the present invention is not limited to this.
The position determination may be performed on the DT side, and the determination result may be transmitted to the position detection processing unit BDT side.

That is, as a modification of the present embodiment, the mobile station MDT may be configured as shown in FIG. 21, and the position detection processing unit BDT may be configured as shown in FIG.

That is, as shown in FIG. 21, the mobile station MDT has the position determination unit 10, the position data storage unit 12a, and the optimum candidate determination unit 1 of the position detection processing unit BDT shown in FIG.
5, a position determination unit 10m, a database 12am, and an optimum candidate determination unit 15m are provided. On the other hand, the position detection processing unit BDT includes a position determination unit 10, a position data storage unit 12a, and an optimum candidate determination unit, as shown in FIG. The configuration is such that the unit 15 is not provided.

In the mobile station MDT shown in FIG.
The position determining unit 10m includes a multipath number measuring unit 4a, a multipath delay amount measuring unit 4b, a multipath electric field intensity measuring unit 4c, a base station electric field intensity measuring unit 4d, and a moving speed measuring unit 4.
data DMP1 to DMP1 indicating the reception status supplied from f.
MPn, DLY1 to DLYn, DEM1 to DEMn, D
A plurality of reference data similar to the EB is searched from the position data storage unit 12am, and a plurality of latitude / longitude data DRxy corresponding to the plurality of reference data is searched from the position data storage unit 12am. It is supplied to the optimal candidate determination unit 15m together with Dsp.

The optimum candidate determining unit 15m performs the same processing as that of the above-mentioned optimal candidate determining unit 15 to determine the mobile station MDT based on the latitude / longitude data DRxy and the speed data Dsp.
It determines the candidate MRxy 'indicating its own current position, determines the most appropriate candidate from the candidates MRxy', generates the optimum position data MRxy, and supplies it to the data generator 4e.

The data generating section 4e transmits the optimum position data MRxy and the identification code data Did to the transmission data Dcn.
The transmission is performed to the position detection processing unit BDT via the transmission unit 5.

On the other hand, the position detection processing unit BDT shown in FIG.
Then, the receiving unit 8 reproduces the optimum position data MRxy and the identification code data Did transmitted from the mobile station MDT as reception data DRXb, and the transmission data generation unit 11 performs the reproduction based on the reproduced optimum position data MRxy. Map data is searched from the provision data storage unit 12b, and the searched map data is converted into transmission data DTXb, which is transmitted to the mobile station MDT via the transmission unit 13. The eta processing unit / system controller 3 in the mobile station MDT displays a map on a display (not shown) based on the map data, and displays the latitude / longitude data DRxy on the displayed map.
, The current position of the mobile station MDT is displayed by a mark with good visibility or the like. As a result, a so-called navigation function for providing geographical information on the current position and its surroundings is exerted, and the user who owns the mobile station MDT simply looks at the map, the mark, and the like displayed on the display. With this, it is possible to easily know the current position of one's own.

In the case of such a modification, the mobile station MD
Since T itself determines the current position, the optimum position data MRxy and the identification code data Did are used as transmission data Dcnd only when the user wants to obtain the map data, and the position detection processing unit BDT is transmitted via the transmission unit 5. It may be transmitted to.

In the above-described embodiment and the modification, the optimal position data MR is transmitted from the mobile station MDT to the base station.
The xy and the identification code data Did are transmitted as transmission data Dcnd, and when the base station transmits (distributes) the map data to the mobile station MDT in response to the transmission data Dcnd, the base station side provides a fixed distribution fee to the user. May be collected. (Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 23 is a block diagram showing the configuration of the mobile station MDT of the present embodiment, and the same or corresponding parts as in FIG. 17 are denoted by the same reference numerals. FIG. 24 shows each of the base stations B1 to B in the present embodiment.
FIG. 19 is a block diagram showing a configuration of a position detection processing unit BDT provided for n. Parts that are the same as or correspond to those in FIG.

In the first and second embodiments, the mobile communication system operator or the like actually measures the reference data,
As shown in FIGS. 3, 18 and 21, the actually measured reference data is stored in the position data storage unit 1 in each of the base stations B1 to Bn.
By storing the position data in the position data storage unit 12am in the mobile station MDT or in the mobile station MDT, a database for searching position data is constructed in advance.

On the other hand, in the present embodiment, the mobile station MDT does not construct a database based only on reference data actually measured in advance by the mobile communication system operator or the like.
The reference data is generated based on the reception status data Dcnd sent from the PC, and the reference data is stored or updated in the position data storage unit 12a of the database 12, so that a larger and more precise database can be constructed. It was done.

Further, the system is provided with charging processing means for reducing the usage charge of the mobile communication system under certain conditions for a user who has provided the reception status data Dcnd for constructing the database. .

In FIG. 23, mobile station MD of the present embodiment
T is provided with an interface unit IF2 for connecting to an electronic device such as an in-vehicle navigation device having a current position measuring unit, a portable personal computer, and a portable mobile terminal device.

For example, a GPS (Global Positioning System)
tem) GP that receives GPS radio signals coming from satellites
An S receiving device 16, a latitude / longitude measuring unit 17 that calculates a current position (latitude and longitude) based on the principle of triangulation based on a GPS received signal Sgps, and latitude / longitude data DGPSxy generated by the latitude / longitude measuring unit 17. When a user owns an electronic device having an interface unit IF1 for external output, the interface unit IF2 of the mobile station MDT can be detachably connected to the interface unit IF1.

A transmission start button switch (not shown) is provided on the housing of the mobile station MDT. When the user turns on the transmission start button switch, the transmission start button switch is turned on via the interface units IF1 and IF2. A mobile station MD is attached to the electronic device.
T is connected, and the electronic device is connected to the mobile station MD.
Different processing is performed for the case where T is not connected.

First, when the user turns on the transmission start button switch in a state where the electronic device and the mobile station MDT are connected via the interface units IF1 and IF2, the data generation unit 4e operates the vehicle navigation system. Latitude / longitude data DGPSxy output from an electronic device such as a device is input through the interface units IF1 and IF2, and the latitude / longitude data DGPSxy is included in reception status data Dcnd described later and transmitted to the base stations B1 to Bn.

That is, when the user turns on the transmission start button switch, the same reception state measurement processing as that of the mobile station MDT of the second embodiment shown in FIG. 17 is performed.
The data generation unit 4e performs multi-path number data DMP1 to DMP 1 with identification code supplied from the multi-path number measurement unit 4a.
MPn and the propagation delay time data DLY1 to DL with the identification code supplied from the multipath delay amount measuring unit 4b.
Yn, multipath electric field strength data DEM1 to DEM1 with identification code supplied from the multipath electric field strength measurement unit 4c.
By combining EMn, base station field strength data DEB supplied from the base station field strength measuring unit 4d, and speed data Dsp supplied from the moving speed measuring unit 4f, feature data DRC ( DMP1 to DMPn, DLY1 to
DLYn, DEM1 to DEMn, DEB, Dsp).

Furthermore, by adding the latitude / longitude data DGPSxy obtained from the electronic device and the identification code data (telephone number etc.) Did of the mobile station MDT to the feature data DRC,
Reception status data Dcnd (DMP1 to DMPn, DLY1 to DLYn, DEM1
~ DEMn, DEB, Dsp, DGPSxy, Did) to generate and transmit
To be transmitted to the base station.

When the user turns on the transmission start button switch in a state where the electronic device is not connected to the mobile station MDT, the mobile station MDT of the second embodiment shown in FIG. The same reception status measurement processing is performed, and the data generation unit 4e further outputs the multi-path number data DMP1 with the identification code supplied from the multi-path number measurement unit 4a.
To DMPn and the propagation delay time data DLY1 with the identification code supplied from the multipath delay amount measurement unit 4b.
DLYn and multipath field strength data DEM1 with identification code supplied from multipath field strength measurement unit 4c
-DEMn, base station field strength data DEB supplied from the base station field strength measuring section 4d, and moving speed measuring section 4f.
From the speed data Dsp supplied from the
Feature data DRC (DMP1 to DMPn, DL
Y1 to DLYn, DEM1 to DEMn, DEB, Dsp) are generated.

Since the electronic device and the mobile station MDT are not connected, the process for adding the latitude and longitude data to the feature data DRC is not performed, and the identification code data (telephone number etc.) Did of the mobile station MDT is used. Is added, the reception status data Dcnd (DMP1 to DMPn, DLY1 to DLYn, DEM1 to DEM
EMn, DEB, Dsp, Did) are generated and supplied to the transmission unit 5 to be transmitted to the base station.

As described above, when the electronic device is connected to the mobile station MDT, the latitude / longitude data DGPSxy supplied from the electronic device and the characteristic data DRC (DMP1 to DMPn, DLY1) measured in the mobile station MDT. ~ DLYn, DEM1 ~ DEMn, DE
B, Dsp) is transmitted to the base station, and when the electronic device is not connected to the mobile station MDT, the characteristic data DRC measured in the mobile station MDT is transmitted.
(DMP1 to DMPn, DLY1 to DLYn, DEM1 to DEMn, DEB, Dsp) are transmitted to the base station side.

Further, in both cases where the mobile station MDT is connected to the electronic device and when the mobile station MDT is not connected to the electronic device, the user can set the transmission start button based on his / her own will. Only when the switch is turned on, measures such as protecting the user's personal information are taken by transmitting the reception status data Dcnd to the base station.

In FIG. 24, each base station B of the present embodiment
The position detection processing unit BDT in 1 to Bn includes a position data generation unit 18, a charging processing unit 19 as charging processing means, and a charging data storage unit 12c.

The position data generating section 18 mainly includes the receiving section 8
A process for generating reference data based on the reception data DRXb (that is, the reception status data Dcnd) reproduced in the step (a) and storing or updating the reference data in the position data storage unit 12a, that is, a process for constructing a database. Then, the charging processing unit 19 performs processing for discounting the system usage fee for the user who has contributed to the construction of the database.

More specifically, the position data generator 1
When the receiving status data Dcnd is supplied from the receiving unit 8, the receiving unit 8 supplies the identification code data Did in the receiving status data Dcnd to the charging processing unit 19. On the other hand, the billing processing unit 19
Searches for user data for which "special contract registration" has been stored in advance in the charging data storage unit 12c, and determines whether the identification code data Did belongs to the user for whom "special contract registration" has been performed. Is determined.

[0177] The user for whom "special contract registration" has been made is a user who uses the mobile communication system, and provides the latitude and longitude data DGPSxy from the mobile station MDT to the base station. This means a user who has made a special contract with the operator of the mobile communication system to thereby contribute to the construction of the database. Therefore, even if the usage contractor who simply uses the mobile communication system is the “system usage contractor”, it is distinguished from the user who has performed “special contract registration”. For convenience of explanation, a user who has performed "special contract registration" will be referred to as a "special contractor", and a user who has only contracted to use the mobile communication system will be referred to as a "system user".

As described above, when the billing processing section 19 determines that the identification code data Did belongs to "special contractor", the determination result is supplied to the position data generation section 18 and the reference data generation processing is performed. Let it start. Further, the billing processing unit 19 sets the identification code data Did to “special contractor”.
If it is determined that the reference data is not the reference data, the determination result is supplied to the position data generation unit 18 to instruct not to perform the reference data generation processing.

When the position data generation unit 18 starts the reference data generation processing according to the determination result from the charging processing unit 19, first, the reception status data Dcnd sent from the “special contractor” includes the latitude / longitude data DGPSxy. Is determined.

When the latitude / longitude data DGPSxy is included, the position data generation unit 18 receives the reception status data Dcnd reproduced by the reception unit 8 to include the reception status data Dcnd for each of the plurality of reception status data Dcnd. Feature data DRC
(DMP1 to DMPn, DLY1 to DLYn, DEM1 to DEMn, DEB, Dsp). Further, when the speed data Dsp in the feature data DRC is larger than a predetermined threshold value THDsp, the feature data DRC is used as data for generating new reference data described later. That is, even if the mobile station MDT is located at the same location, the radio wave arriving at the mobile station MDT from each of the base stations B1 to Bn may fluctuate due to fading or the like. When the value is larger than THDsp, the characteristic data DRC
Is determined to represent the reception situation in the mobile station MDT well, and is used as data for generating new reference data described later.

Further, when the acquisition of the feature data DRC is completed, the position data storage unit 12a is searched, and the feature data DRC is retrieved.
It is checked whether the same latitude / longitude data as the middle latitude / longitude data DGPSxy is stored as reference data in the position data storage unit 12a. Here, if the same latitude / longitude data as the latitude / longitude data DGPSxy is not yet stored in the position data storage unit 12a, the latitude / longitude data DGPSxy and the feature data DMP1 to DMPn, DLY1
DLYn, DEM1 to DEMn, and DEB correspond to new reference data (DGPSxy; DMP1 to DMPn,
DLY1 to DLYn, DEM1 to DEMn, and DEB) are generated and stored in the position data storage unit 12a, and further, the fact that the new reference data is stored in the position data storage unit 12a is notified to the accounting processing unit 19.

When the information indicating that the new reference data is stored in the position data storage unit 12a is notified to the charging processing unit 19, the charging processing unit 19 sets the reception status data Dcn.
Performs a process for discounting the system usage fee of the "special contractor" who sent d, which has contributed to the database construction (hereinafter referred to as "class 1 discount"), and furthermore, the "special contractor" Outputs the discrimination data DCHK1 indicating that the person is the subject of the “first-class discount”.

The position data generation unit 18 searches the position data storage unit 12a and finds that the "special contractor"
If the same latitude / longitude data as the latitude / longitude data DGPSxy sent from the storage unit 12a has already been stored in the position data storage unit 12a, the reception status data D reproduced by the reception unit 8
By inputting cnd, the characteristic data DRC (DMP1 to DMPn, DLY1 to DLYn, DE) included in the reception status data Dcnd are input.
M1 ~ DEMn, DEB, Dsp) and obtain the feature data DRC
When the middle speed data Dsp is a value larger than the predetermined threshold value THDsp, the feature data DRC is used as data for generating reference data for updating, which will be described later. That is, even if the mobile station MDT is located at the same location, the radio wave arriving at the mobile station MDT from each of the base stations B1 to Bn may fluctuate due to fading or the like. When the value is larger, it is determined that the characteristic data DRC is a good representation of the reception situation at the mobile station MDT, and is used as data for generating update reference data to be described later.

After obtaining the characteristic data DRC,
The position data storage unit 12a is searched, and each of the characteristic data DMP1 to DMPn, DLY1 included in the characteristic data DRC is searched.
It is checked whether or not DLYn, DEM1 to DEMn, and DEB are the same as the respective feature data stored in association with the latitude and longitude data already stored in the position data storage unit 12a.

The above feature data DMP1 to DMPn, D
If LY1 to DLYn, DEM1 to DEMn, and DEB are different from the already stored feature data,
The feature data DMP1 to DMPn and DLY1 to DLY included in the feature data DRC acquired from the receiving unit 8 described above.
n, DEM1 to DEMn, DEB as new feature data to the latitude / longitude data DGPSxy,
Reference data for updating (DGPSxy; DMP1 to DMPn, DLY1 to DLY
n, DEM1 to DEMn, DEB), and replaces the previously stored old reference data including the latitude / longitude data and the feature data with the above-mentioned reference data for updating, and stores it in the position data storage unit 12a. Let it.

That is, in this case, the new reference data is not newly stored in the position data storage unit 12a, but the old reference data existing in the position data storage unit 12a is updated with the reference data for update. I do. Then, the charge processing unit 19 is notified that the update has been performed. In addition, even when the above update is performed, the charging processing unit 19 performs the “first-class discount” process on the “special contractor” who has sent the reception status data Dcnd, It outputs the discrimination data DCHK1 indicating that the person is the target of "seed discount".

When the position data generating unit 18 determines that the reception status data Dcnd sent from the “special contractor” does not include the latitude / longitude data DGPSxy, the position data generation unit 18 stores the data in the position data storage unit 12a. The process for storing the reference data is not performed, and the notification to the effect that the latitude / longitude data DGPSxy does not exist is sent to the accounting unit 19. Then, upon receiving the notification that the latitude / longitude data DGPSxy is not present, the billing processing unit 19 performs a process for performing a “second type discount” on the “special contractor” who has sent the reception status data Dcnd. At the same time, discrimination data DCHK2 indicating that the "special contractor" is the target of the "second kind discount" is output.

As described above, the position data generation unit 18, the accounting processing unit 19, and the accounting data storage unit 12c cooperate with each other to determine whether or not the user is a "special contractor". When new reference data is stored in the position data storage unit 12a based on the reception status data Dcnd sent from the customer, or the feature data is updated based on the reception status data Dcnd sent from the "special contractor". In the case of performing the service, the “special contractor” is set as a target of the “first-class discount”, and the reception status data Dcnd sent from the “special contractor” includes the latitude / longitude data DGPSxy. If not, the "special contractor" is set as a target of the "second class discount", and a billing process for discounting the system usage fee is performed, and the reception status data Dcnd is obtained from the "special contractor". Not a place In is adapted to perform the billing process in order to collect the system usage fees as not a subject of the fee discount.

That is, as shown in FIG. 27, the “special contractor” is applied with the “first-class discount” and the “second-class discount” based on predetermined conditions, and the “special contract registration” is performed. Discounts are not applied to users who have not done so (non-subscribers).

Note that the billing processing section 19 stores the “special contractor” when the new reference data is stored or updated with the reference data for updating, that is, the “special contractor” which substantially contributed to the database construction. The number of times the "contractor" has been subjected to the "first-class discount" is counted, and the accumulated count value is stored in the charging data storage unit 12c as history data DG indicating the degree of contribution to database construction. Then, as the value of the history data DG indicating the degree of contribution is larger, the “special contractor” increases the discount rate K of the “first type discount”.

As described above, by adjusting the discount rate K of the “first kind discount”, for example, the position data storage unit 12a
The "special contractor" who has sent the reception status data Dcnd which has not yet been recorded in the location data storage unit 1
A difference is made in the degree of contribution that has substantially contributed to the construction of the database between the "special contractor" who has sent the reception status data Dcnd recorded in 2a many times.

[0192] The "special contractor" who has sent the reception status data Dcnd that does not include the latitude / longitude data DGPSxy
Is a "special contractor" who owns an in-vehicle navigation device that can potentially contribute to the construction of a database, although it does not substantially contribute to the construction of the database depending on the reception status data Dcnd at that time. Because of this, it is subject to the “second-class discount”.

However, the discount rate K of “first kind discount” is always set higher than the discount rate M of “second kind discount”.

In this way, new reference data and update reference data are generated based on the reception status data Dcnd sent from the “special contractor” while discounting the “special contractor” under predetermined conditions. By storing and updating the position data in the position data storage unit 12a, a file-managed database as shown in FIGS. 11 to 15 is automatically constructed.

When the old reference data in the position data storage section 12a is updated with the update reference data, the latitude / longitude data DGPSxy does not change, but the latitude / longitude data DG
Even if, for example, a new building or the like is built around the point of PSxy and the reception status of radio waves from each of the base stations B1 to Bn changes, the database is updated based on the update reference data. The content will be updated. For this reason, it is possible to construct and maintain a high-precision database that is up-to-date and responsive to actual conditions.

Next, the position determining unit 10, the transmission data generating unit 11, and the optimal candidate determining unit 15 will be described. First, a brief description will be given of the position determination unit 10 and the transmission data generation unit 11.
And the optimal candidate determination unit 15 cooperate with each other to provide information on the current location to the users except for the “special contractor” who has been subject to the “first-class discount”. I do.

In other words, the “special contractor” who is the target of the “first-class discount” can know the current position by using the in-vehicle navigation device or the like owned by himself / herself.
Information on the current location will not be provided to the "special contractor" who has been the target of the "class 1 discount."

However, the mobile station MDT is removed from the in-vehicle navigation device or the like owned by the user and the mobile station MD is removed.
Since it is not possible to know the information on the current position to the "special contractor (the person who is subject to the second kind discount)" which is used by carrying T alone, the information on the current position is provided. .

Further, information on the current position is provided to a mere “system user” who has not performed “special contract registration”.

Incidentally, a user who has an electronic device capable of measuring the current position, such as an in-vehicle navigation device, but does not perform “special contract registration” receives the latitude / longitude data DGPSxy measured by the electronic device. When the data is transmitted to the base station while being included in the status data Dcnd, information on the current position is provided to the user in the same manner as a mere “system user”.

When the receiving section 8 reproduces and outputs the reception status data Dcnd as described above, the position determination section 10 inputs the reception status data Dcnd. Further, the billing processing unit 1
From step 9, it is checked which of the discrimination data DCHK1, DCHK2, and DCHK3 has been output.

When the discrimination data DCHK1 is output, as described above, the reception status data Dcnd is transmitted from the "special contractor" who has been subjected to the "first kind discount". It is instructed not to perform the process for returning the information on the current position upon judging that there is, and further not to perform the process for returning the information on the current position also to the transmission data generation unit 11 and the optimum candidate determination unit 15. I do.

On the other hand, determination data DCH
When K2 or DCHK3 is output, in cooperation with the transmission data generation unit 11 and the optimum candidate determination unit 15, the "special contractor" or the "system user" who is the target of the "second type discount" ”Is started.

When the position judging unit 10 starts the process for returning the information of the current position, the data DRXb reproduced by the receiving unit 8, that is, the reception status data Dcnd (DMP1 to DMPn) transmitted from the mobile station MDT. , DLY1-DLYn, D
EM1 to DEMn, DEB, Dsp, Did) are input, and FIGS.
Is searched for the reference data in the position data storage unit 12a shown in FIG.
A plurality of reference data similar to Yn, DEM1 to DEMn, DEB are determined, and a plurality of latitude / longitude data DRxy corresponding to the determination result are supplied to the optimum candidate determination unit 15.

Further, the speed data Dsp in the reception status data Dcnd is transferred to the optimum candidate judging unit 15 together with the latitude / longitude data DRxy.

Note that the above feature data DMP1 to DMP
n, DLY1 to DLYn, DEM1 to DEMn, DEB
When determining a plurality of reference data similar to the above, the feature data DMP1 to DMPn, DLY1 to DLYn, DE
Even if reference data in which only some of the data M1 to DEMn and DEB are similar, a relatively gradual determination as a determination target is performed, and a plurality of latitude / longitude data DRxy corresponding to the determination result is obtained. It is supplied to the optimum candidate determination unit 15. Also, the feature data DMP1 to DMPn, DLY
1 to DLYn, DEM1 to DEMn, and DEB are correlated with the reference data, and it is determined that the reference data having a correlation value equal to or greater than a predetermined value are similar.

Further, the position judging unit 10 does not judge the plural pieces of latitude / longitude data DRxy by inputting the reception status data Dcnd sent from the mobile station MDT only once, but , Receiving condition data Dcnd sent for a certain period of time is input a plurality of times, and characteristic data DMP1 to DMPn and DLY1 to DLY obtained each time are input.
A plurality of reference data similar to n, DEM1 to DEMn, and DEB are determined, and a plurality of latitude / longitude data DRxy corresponding to the determination result are supplied to the optimum candidate determination unit 15. In this embodiment, the reception status data Dcnd is input three times.

Therefore, every time the position determination unit 10 receives the reception status data Dcnd, the position determination unit 10 outputs
Rxy is determined and supplied to the optimal candidate determining unit 15.

[0209] The optimum candidate determining section 15 is provided with a plurality of pieces of latitude / longitude data D supplied from the position determining section 10 a plurality of times.
Based on Rxy, optimum position data MRxy indicating the current position of the mobile station MDT is generated.

That is, similarly to the case shown in FIG. 20, a plurality of pieces of latitude / longitude data DR
xy is arranged on the coordinates of latitude and longitude, the number of occurrences of the same thing is cumulatively added, and the center of gravity (latitude and longitude) having the largest value in the average value distribution obtained by cumulative addition is determined by the mobile station M.
It is determined to be a strong candidate MRxy 'representing the current position of the DT.

For example, the first plurality of latitude / longitude data DRxy supplied from the position judging unit 10 are PS11 to PS1.
3. Second latitude / longitude data DRxy is PS21-PS2
3. The third latitude / longitude data DRxy is PS31-PS33
, These latitude / longitude data PS11-P
S13, PS21 to PS23, and PS31 to PS33 are arranged respectively, and the number of occurrences of the same ones is cumulatively added. Further, the center of gravity (latitude and longitude) having the largest value in the cumulatively added average value distribution is moved. It is determined to be a strong candidate MRxy 'representing the current position of the station MDT.

Further, the value of the speed data Dsp is set to a predetermined threshold value T.
When the speed data Dsp having a value greater than the threshold value THDsp is obtained as compared with HDsp, the candidate MRxy ′ is set to the mobile station M.
It is determined that the current position of the DT is indicated, and the candidate M
Rxy 'as the optimum position data MRxy (= MRxy')
This is supplied to the transmission data generation unit 11.

On the other hand, when the speed data Dsp having a value larger than the threshold value THDsp cannot be obtained, the optimum position data MRxy obtained in the previous process is used as it is as the optimum position data MRxy.
The data is supplied to the transmission data generator 11 as xy.

As described above, the optimum candidate judging unit 15 examines the frequency of occurrence of a plurality of pieces of latitude / longitude data Rxy, and determines the optimal position indicating the current position of the mobile station MDT based on the latitude / longitude with the highest frequency. By generating data MRxy,
The current position of the mobile station MDT is detected with high accuracy.

Further, in a multiple access communication such as W-CDMA, even if the distance from the base station to the mobile station is the same,
The electric field strength of the arriving radio wave remarkably changes due to the effects of fading or the like. Generally, when the moving speed of the base station is low, the electric field strength varies greatly. However, when the speed data Dsp indicating the moving speed of the phase station MDT becomes larger than a predetermined threshold value THDsp, it is determined that the optimum position data MRxy is the data indicating the current position of the mobile station MDT. The current position of the MDT can be detected with extremely high accuracy.

When the optimum position data MRxy is supplied, the transmission data generation unit 11 searches the provided data storage unit 12b based on the optimum position data MRxy, and
The map data of the point indicated by Rxy and its surroundings is acquired. Then, the transmission data DTXb is generated by combining the optimum position data MRxy and the map data, and transmitted to the mobile station MDT via the transmission unit 13.

When transmission data DTXb is transmitted in this manner, mobile station MDT shown in FIG. 23 transmits transmission data DTXb.
b as received data DRxm, and the data processing unit / system controller 3 displays the map data and the optimal position data MRxy included in the transmission data DTXb on a display, so that the user's current position can be visually recognized easily. Provide in state.

Next, the operation of the communication system of this embodiment will be described with reference to the flowcharts shown in FIGS. FIG. 25 shows the operation of the mobile station MDT shown in FIG. 23, and FIG. 26 shows the operation of the position detection processing unit BDT shown in FIG.

In FIG. 25, when the transmission start button switch provided in the mobile station MDT owned by the user performing “special contract registration” is turned on (step S5).
00), after the data processing unit / system controller 3 detects this, it is checked whether the mobile station MDT is connected to an electronic device such as an in-vehicle navigation device (step S).
502). When the mobile station MDT is connected to the electronic device, the data generation unit 4e acquires the latitude / longitude data DGPSxy measured by the electronic device (step S504), and further receives the data by the cell search unit 6 and the measurement units 4a to 4f. A situation measurement process is performed to generate feature data DRC indicating features of the measured reception situation (step S506). Next, the data generation unit 4e receives the reception status data D having the latitude / longitude data DGPSxy, the feature data DRC, and the identification code data Did.
cnd is generated (step S508), and the reception status data Dcnd is transmitted to the base station (step S510).
The process for providing information contributing to the construction of the database ends.

[0220] When the reception status data Dcnd is transmitted to the base station in this way, the user who has performed "special contract registration" can be applied with "class 1 discount" or "class 2 discount" described later.

On the other hand, if it is determined in step S502 that the mobile station MDT is not connected to the electronic device, the flow shifts to step S512 to perform the reception state measurement processing by the cell search unit 6 and the measurement units 4a to 4f. Then, feature data DRC indicating the feature of the measured reception status is generated (step S512). Further, the data generation unit 4e generates reception status data Dcnd having the characteristic data DRC and the identification code data Did (step S514), and transmits the reception status data Dcnd to the base station (step S514).
516), and waits until there is a return from the base station.

That is, when the reception status data Dcnd that does not include the latitude / longitude data DGPSxy is transmitted to the base station, the base station enters a standby state until information indicating the current position of the mobile station MDT is returned from the base station.

When the data DTXb is returned from the base station in step S636 described later, the data DTXb is received and reproduced (step S518), and further, the data processing unit / system controller 3 transmits the data DTXb.
The optimum position data MRxy and map data included in TXb are displayed on a display and provided to the user.

[0224] When the user who has performed the "special contract registration" transmits the reception status data Dcnd that does not include the latitude / longitude data DGPSxy to the base station, the "second type discount" is applied.

Note that even if a user who has not performed “special contract registration” owns the mobile station MDT, and the user turns on the transmission start button switch in step S500, the connection to the electronic device is maintained. Is transmitted in step S510 or S516 according to the presence or absence of. However, in this case, when the position detection processing unit BDT on the base station side determines that the user is “unsubscriber” and the data DTXb is returned from the base station in step S518, the position detection processing unit BD
The charging processing unit 19 in T collects a normal system usage fee without a discount.

Next, based on FIG.
The operation of the DT will be described. Step S510 or S5 above
In step 16, when the reception status data Dcnd is transmitted from the mobile station MDT to the base station side, the position detection processing unit BD in the base station located at a location where the reception status data Dcnd can be received.
T receives and reproduces the reception status data Dcnd (step S600).

Next, the identification code data Did in the reception status data Dcnd is checked, and it is determined whether the reception status data Dcnd has been sent from the "special contractor" (step S602).

If it is determined that the user is not a “special contractor”, the flow shifts to step S604 to search for reference data in the position data storage section 12a based on the characteristic data DRC included in the reception status data Dcnd, and search Based on the reference data thus obtained, optimum position data MRxy indicating the current position of the mobile station MDT is generated. Further, map data in the provision data storage unit 12b is searched and acquired based on the optimum position data MRxy (step S606), and the optimum position data MR is obtained.
After generating transmission data DTXb having xy and map data (step S608), the transmission data DTXb is
The mobile station MDT transmits (returns) the reception status data Dcnd to the mobile station MDT (step S610).

[0229] Then, as a price for providing the optimal position data MRxy and the map data to the user (non-contractor) who is not the "special contractor" who has sent the reception status data Dcnd, A billing process for collecting a usage fee is performed.

If the identification code data Did is that of the "special contractor" in step S602, the determination is made in step S614, and the latitude / longitude data DGPSxy is present in the reception status data Dcnd. It is checked (step S616).

If the latitude / longitude data DGPSxy is present, the flow shifts to step S618 to change the “special contractor” who has sent the reception status data Dcnd to “the first kind discount”.
If there is no latitude / longitude data DGPSxy, the process proceeds to step S628, and the “special contractor” that has sent the reception status data Dcnd is referred to as “second type discount”.
The target person is determined.

When the "special contractor" is determined to be the subject of the "first kind discount" in step S618, the moving longitude data identical to the transmitted latitude / longitude data DGPSxy is stored in the position data storage unit 12a. It is checked whether the data is already stored (step S620). If the data is not stored yet (in the case of "No"), the characteristic data DRC included in the reception status data Dcnd and the latitude / longitude data DGPSxy are associated with each other, and a new data is obtained. The reference data is generated and stored in the position data storage unit 12a (Step S622).

On the other hand, if it has already been stored (“Ye
In the case of “s”), update reference data is generated based on the feature data DRC included in the reception status data Dcnd, and the feature data of the old reference data stored in the position data storage unit 12a is updated. It is updated by replacing with the reference data for use (step S624). That is, only when the old reference data and the feature data are different, the above-mentioned update is performed by generating the update reference data based on the feature data DRC.

Then, step S622 or step S622
When the process of 624, that is, the process for constructing the database is completed, the number of times that the subject of the “first-class discount” contributed to the database construction is cumulatively counted, and the “first-class discount” is based on the accumulated number. Is performed (step S626), and the process ends.

The above steps S616 to S62
In the case where it is determined that the “special contractor” who has sent the reception status data Dcnd is a target of the “second-class discount”, the process proceeds to step 8 in which the characteristic data included in the reception status data Dcnd is determined. The reference data in the position data storage unit 12a is searched based on the DRC, and the mobile station M is searched based on the searched reference data.
The optimum position data MRxy indicating the current position of the DT is generated (step S630). Further, based on the optimum position data MRxy, the map data in the provision data storage unit 12b is searched and obtained (step S632), and the optimum position data M
After generating transmission data DTXb having Rxy and map data (step S634), the transmission data DTXb is generated.
Is transmitted (returned) to the mobile station MDT that has transmitted the reception status data Dcnd (step S636).

Then, the charging processing section 19 performs the charging processing based on the “second kind discount” on the “special contractor” who has sent the reception status data Dcnd (step S638).
The process ends.

As described above, according to the present embodiment, an excellent effect that the reference data to be stored in the position data storage section 12a can be constructed based on the reception status data Dcnd from the mobile station MDT. I do. In particular, it is difficult to actually measure the position information in a vast communication area, but since the database is constructed based on the reception status data Dcnd from the mobile station MDT owned by the user, it is practically adapted. A highly accurate database can be constructed.

[0238] Also, by providing a discount for the user who has registered the special contract and contributed to the construction of the database, the service for the user can be improved.

Also, by storing or updating the new reference data or the updated reference data in the position data storage unit 12a, the “special contractor” who has substantially contributed to the construction of the database has been contributed. Since the number of times is counted and the discount rate is increased according to the accumulated count value, a reasonable discount can be provided between the user and the operator of the mobile communication system.

In a general case where the user who is a “special contractor” removes the mobile station MDT from the on-vehicle navigation device and uses it outside the vehicle, information on the current position is provided from the base station side. Therefore, the convenience for the user can be improved.

[0241] The latitude / longitude data DGPSxy supplied from an electronic device such as an in-vehicle navigation device is stored in the mobile station M.
Since the DT is used to transmit to the base station side, the mobile station MDT itself has the effect of not having to provide a means for detecting the position of a GPS device or the like. For example, if a GPS device or the like is provided in the mobile station MDT itself, it becomes necessary to incorporate a large-capacity battery in the mobile station MDT, which causes a problem that portability is impaired. According to the present embodiment, Since position detection is performed by a power supply on the side of an electronic device such as an in-vehicle navigation device, there is no need to incorporate a large-capacity battery in the mobile station MDT itself, thereby preventing problems such as impairing portability. be able to.

However, the present invention provides the mobile station MDT with G
It is not denied that the PS receiver or the like is permanently installed, and a GPS receiver or the like may be permanently installed in the mobile station MDT, or a GPS receiver unitized in the mobile station MDT may be detachably provided.

Further, the reception status data Dcnd is transmitted to the base station only when the user turns on a predetermined transmission start button switch, so that personal information can be protected under the responsibility of the user. And the like.

It is to be noted that the present invention is not limited to the case where the transmission start button switch is turned on by the user, but that the reception status data Dcnd is transmitted to the base station at regular intervals, for example. Or the like, or the content of the discount may have a variation.

Also, in the present embodiment, the user of the “first kind discount” receives the current position data (optimal position data MRxy).
Is not provided, but it may be configured to provide at least map data. According to this configuration, the latest map data is provided from the base station to the user,
The effect is obtained that the latest map data can be downloaded to the in-vehicle navigation device owned by the user, and the service for the user can be improved.

In the present embodiment, the moving point of the mobile station MDT is detected based on all the data of the number of multipaths, the multipath delay time, the multipath electric field strength, and the base station electric field strength. Without depending on the information of
The present position of the mobile station MDT can be accurately detected without practical problems.

As described above, the present mobile communication system enables the realization of a mobile communication system capable of coping with a diversified mobile communication environment, for example, a diversified business model.

Also, in the first to third embodiments described above, the case where the mobile station MDT is a mobile phone has been described as a typical example, but the present invention is not limited to a mobile phone, The present invention can be applied to a mobile terminal device for transmitting and receiving data, a personal computer having a communication function, a portable navigation system, and the like, and does not limit a usage form.

[0249]

As described above, according to the present invention, a mobile station receives a radio wave arriving from a base station, measures the number of multipaths of the received radio wave, and based on the multipath number, the mobile station. Since the position of is detected on the mobile station or base station side,
Position detection is performed immediately in response to the actual environment (reception situation) around the mobile station, and highly accurate position detection can be realized.

Further, since the provided data corresponding to the detected position is transmitted from the base station to the mobile station, various data can be provided to the user on the mobile station side, and the diversified mobile communication environment can be provided. It is possible to provide a mobile communication system capable of coping with the above.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a cell configuration of a communication area.

FIG. 2 is a block diagram illustrating a configuration of a mobile station according to the first embodiment.

FIG. 3 is a block diagram illustrating a configuration of a base station according to the first embodiment.

FIG. 4 is a diagram exemplifying a mode of a radio wave arriving at a mobile station from each base station.

FIG. 5 is a diagram illustrating an example of a correlation signal generated by a cell search unit.

FIG. 6 is a diagram schematically illustrating a configuration and a modification of the multipath number measurement unit according to the first embodiment.

FIG. 7 is a diagram schematically illustrating a configuration and a modification of the multipath delay amount measurement unit according to the first embodiment.

FIG. 8 is a diagram schematically illustrating a configuration and a modification of the multipath electric field strength measurement unit according to the first embodiment.

FIG. 9 is a diagram schematically illustrating a configuration of a base station electric field strength measurement unit according to the first embodiment.

FIG. 10 is a diagram for explaining a method of forming latitude and longitude data in the first embodiment.

FIG. 11 is a diagram showing a structure of a latitude / longitude database.

FIG. 12 is a diagram showing a structure of a multipath number database.

FIG. 13 is a diagram showing a structure of a multipath delay time database.

FIG. 14 is a diagram showing a structure of a multipath electric field strength database.

FIG. 15 is a diagram showing a structure of a base station electric field strength database.

FIG. 16 is a flowchart for explaining the operation of the first embodiment.

FIG. 17 is a block diagram illustrating a configuration of a mobile station according to the second embodiment.

FIG. 18 is a block diagram illustrating a configuration of a base station according to the second embodiment.

FIG. 19 is a diagram for explaining a method of measuring a moving speed of a mobile station.

FIG. 20 is a diagram illustrating a method of measuring the position of a mobile station.

FIG. 21 is a block diagram illustrating a configuration of a modification of the mobile station according to the second embodiment.

FIG. 22 is a block diagram illustrating a configuration of a modification of the base station according to the second embodiment.

FIG. 23 is a block diagram illustrating a configuration of a mobile station according to the third embodiment.

FIG. 24 is a block diagram illustrating a configuration of a base station according to the third embodiment.

FIG. 25 is a flowchart illustrating an operation of the mobile station according to the third embodiment.

FIG. 26 is a flowchart illustrating an operation of the base station according to the third embodiment.

FIG. 27 is a diagram showing a mode of a billing process.

[Explanation of symbols]

 SEL1 to SELn cell B1 to Bn base station MDT mobile station BDT position detection processing unit 2, 8 reception unit 5, 13 transmission unit 3, 9 data processing unit / system controller 4 position analysis unit 4a Multipath number measurement unit 4b Multipath delay amount measurement unit 4c Multipath electric field intensity measurement unit 4d Base station electric field intensity measurement unit 4e Data generation unit 4f Moving speed measurement unit 6 Cell search unit 10, 10m Position Judgment unit 11 ... Transmission data generation unit 12 ... Database 12a, 12am ... Position data storage unit 12b ... Provision data storage unit 12c ... Charging data storage unit 15, 15m ... Optimal candidate judgment unit 16 ... GPS receiver 17 ... Latitude and longitude measurement Unit 18 Position data generation unit 19 Billing processing unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuki Kodama 6-1-1 Fujimi, Tsurugashima-shi, Saitama Pioneer Corporation (72) Inventor Masami Suzuki 6-1-1 Fujimi, Tsurugashima-shi, Saitama Pioneer Corporation Research Laboratory (72) Inventor Hiroto Inoue 6-1, 1-1 Fujimi, Tsurugashima City, Saitama Prefecture Pioneer Corporation Research Laboratory (72) Katsunori Arakawa 6-1, Fujimi, Tsurugashima City, Saitama Prefecture No. Pioneer Corporation Research Institute (72) Inventor Satoshi Odagawa 6-11-1, Fujimi, Tsurugashima-shi, Saitama Prefecture Pioneer Corporation Research Institute (72) Inventor Osamu Yamazaki 6-1-1, Fujimi, Tsurugashima-shi, Saitama Prefecture No. Pioneer Corporation Research Institute (72) Inventor Masahiro Okamura Tsurugashima City, Saitama Prefecture 6-1-1 Fujimi, Pioneer Corporation Research Laboratory (72) Inventor Naoyuki Akimoto 6-1-1, Fujimi, Tsurugashima-shi, Saitama Prefecture Pioneer Corporation General Research Laboratory F-term (reference) 5K067 BB03 BB04 BB08 DD20 DD44 EE02 EE10 EE24 FF03 FF16 FF23 GG01 GG11 HH22 HH23 JJ53 JJ54 JJ57

Claims (20)

[Claims] 1. A mobile communication system in which a plurality of base stations are arranged in a communication area and a position of a mobile station located in the communication area is detected, wherein the mobile station transmits an incoming radio wave from the base station. Receiving means for receiving, multipath measuring means for measuring the number of multipaths based on a reception signal from each base station which is received by the receiving means, and transmitting information on the number of multipaths to the base station Transmitting means, the base station, based on the transmitted information of the number of multipath, based on the information of the number of multipath, comprising a position detecting means for detecting the position of the mobile station that has transmitted the information of the number of multipath, Characteristic mobile communication system. 2. A mobile communication system in which a plurality of base stations are arranged in a communication area and a position of a mobile station moving in the communication area is detected, wherein the mobile station transmits an incoming radio wave from the base station. Receiving means for receiving, multipath measuring means for measuring the number of multipaths based on a received signal of an incoming radio wave from each base station received by the receiving means, information on the number of multipaths measured by the multipath measuring means A mobile communication system, comprising: a position detecting means for detecting a position based on the position information; and a transmitting means for transmitting position information detected by the position detecting means to a base station. 3. A plurality of base stations are arranged in a communication area,
A mobile communication system for detecting a position of a mobile station located in a communication area, wherein the mobile station receives an incoming radio wave from a base station; and First measuring means for measuring the number of multipaths based on a received signal from an incoming radio wave; multipath delay time based on a received signal from each base station received by the receiving means from each base station; Second measuring means for measuring at least one reception condition among the electric field strengths of the radio waves and the ratios of the electric field strengths of the radio waves arriving from the respective base stations, and the number of multipaths measured by the first measuring means Transmitting means for transmitting information and reception status information measured by the second measurement means to the base station, wherein the base station transmits the transmitted multipath number information and the reception status information to the base station. Based Te, a mobile communication system, characterized in that, with a position detecting means for detecting a position of the mobile station. 4. A mobile communication system in which a plurality of base stations are arranged in a communication area and a position of a mobile station moving in the communication area is detected, wherein the mobile station transmits an incoming radio wave from the base station. Receiving means for receiving, first measuring means for measuring the number of multipaths based on a reception signal of an incoming radio wave from each base station received by the receiving means, arrival from each base station received by the receiving means A second measurement for measuring at least one reception state among a delay time of a multipath, an electric field strength for each multipath, and a ratio of each electric field strength of an electric wave arriving from each base station based on a reception signal by radio waves. Means; position detecting means for detecting the position of the mobile station based on the information on the number of multipaths measured by the first measuring means and information on the reception status measured by the second measuring means; Of means Mobile communication system comprising: a transmitting means for transmitting the position information issued to the base station. 5. The apparatus according to claim 1, wherein said position detecting means includes position data storing means for storing position data at each point in the communication area in correspondence with the number of multipaths. 2. The mobile communication system according to claim 1. 6. The position detecting means detects a position of a mobile station by comparing the number of multipaths measured by the multipath measuring means with the number of multipaths stored in the position data storing means. The mobile communication system according to claim 5, wherein: 7. The position detection means compares the number of multipaths measured by the multipath measurement means with the number of multipaths stored in the position data storage means, and determines the number of multipaths having the highest correlation. 6. The mobile station according to claim 5, wherein the mobile station detects a location based on the corresponding location data.
3. The mobile communication system according to claim 1. 8. The mobile station according to claim 1, further comprising: display means for displaying map information, wherein a position of the mobile station detected by the position detection means is displayed in association with the map information.
The mobile communication system according to any one of claims 4 to 4. 9. The base station, provided data storage means for storing user-provided data relating to each point in the communication area, and use of a point corresponding to the position of the mobile station detected by the position detection means. Transmitting means for obtaining data provided by the user from the provided data storage means and transmitting the data to the mobile station, wherein the mobile station receives data provided by the user from the transmitting means of the base station The mobile communication system according to claim 1 or 3, further comprising: 10. The base station, provided data storage means for storing user-provided data relating to each point in the communication area, and a location of the mobile station based on location information transmitted from the mobile station. Transmitting means for acquiring user providing data at a point corresponding to the above from the providing data storing means and transmitting the data to the mobile station, wherein the mobile station provides the user from the transmitting means of the base station. The mobile communication system according to claim 2, further comprising a receiving unit that receives application data. 11. A mobile station comprising the receiving unit, the multipath measuring unit, and the transmitting unit according to claim 1. 12. A mobile station comprising the receiving means, the multipath measuring means, the position detecting means, and the transmitting means according to claim 2 or 4. 13. A mobile station comprising the position and position detecting means provided with the position data storing means according to any one of claims 5 to 7. 14. A mobile station comprising the display unit according to claim 8. 15. A mobile station comprising the receiving means according to claim 9. 16. A mobile station comprising the receiving means according to claim 10. 17. A base station comprising the position detecting means according to claim 1. Description: 18. A base station comprising: the position detecting means provided with the position data storing means according to claim 5. Description: 19. A base station comprising the provided data storage unit and the transmission unit according to claim 9. 20. A base station comprising the provided data storage unit and the transmission unit according to claim 10.