CN1464753A - Repeater having locating function and auxiliary locating method thereof in mobile communication system - Google Patents

Abstract

The invention discloses a repeater with a positioning function in a mobile communication system and an auxiliary positioning method thereof. The repeater with a positioning function in a mobile communication system includes: a radio frequency forwarding unit, a positioning control and operation maintenance unit, and a communication unit; Among them, the radio frequency forwarding unit completes the signal forwarding function of the repeater; the communication unit completes the information sending and receiving function between the repeater and the base station; the positioning control and operation maintenance unit completes the control of the positioning unit and the operation and maintenance function of the repeater; The feature is that it also includes a positioning unit, the input end of which receives the signal from the radio frequency transponder unit, and is bidirectionally connected with the positioning control and operation and maintenance unit, and the positioning unit completes the positioning of one or Detect the uplink signals of multiple mobile stations, and judge whether the mobile station belongs to the coverage area of the repeater. The invention can be applied to various standard positioning such as cell-based positioning, OTDOA positioning of WCDMA and AFLT positioning of CDMA/CDMA2000, and can significantly improve positioning accuracy.

Description

Repeater with positioning function in mobile communication system and its auxiliary positioning method

technical field

The invention relates to a positioning technology of a mobile communication system, in particular to a repeater with a positioning function in the mobile communication system and an auxiliary positioning method thereof.

Background technique

In the existing mobile communication system, in order to solve the coverage problem, repeaters are widely used. There are three main types of existing repeaters, namely optical fiber repeater, radio frequency repeater and radio remote. No matter what kind of repeater, it only plays the function of signal forwarding.

Existing repeaters will seriously affect the realization of mobile station positioning. Since the signals of the repeater are generally collected at the radio frequency end and then sent to the base station for processing, the base station does not distinguish which repeater's coverage area the mobile station is located in. When the mobile station is in the coverage area of the repeater, the positioning measurement will introduce deviation, and the existing repeater does not have the corresponding positioning detection function and reporting function, and the mobile positioning center cannot correct this deviation. Therefore, the existing The repeater will significantly reduce the positioning accuracy, and in severe cases, it will cause the standard mobile station positioning method to fail. As shown in Figure 1. Figure 1 shows a schematic diagram of the impact of repeaters on positioning

The impact of existing repeaters on the positioning of mobile stations in different mobile communication systems:

In GSM, CDMA, CDMA2000, and WCDMA and other systems based on cell positioning methods that are widely used, the positioning accuracy depends on the radius of the cell. As shown in Figure 1, due to the introduction of the repeater, the radius of the cell will no longer be the radius of the cell covered by the original base station, but is determined by the coverage radius of the base station, the distance between the base station and the repeater, and the coverage radius of the repeater. Therefore, in the repeater environment, the equivalent coverage radius of the base station will be significantly increased, and the positioning accuracy of the cell-based positioning method will be significantly deteriorated.

In the OTDOA positioning method of WCDMA, the mobile station uses the downlink common pilot signals of different base stations to complete the propagation delay difference measurement, and then calculates the position of the mobile station according to the hyperbolic positioning principle. As shown in Fig. 2, Fig. 2 shows a schematic diagram of how the repeater affects the positioning measurement of the mobile station. When the mobile station is located in the coverage area of repeater A, the mobile station cannot directly receive the signal of base station A, but can only receive the signal forwarded by repeater A, and the signal forwarded by repeater A contains additional propagation Delay, which will cause a large deviation in the measurement of the propagation delay difference of the mobile station, affect the OTDOA positioning accuracy, and even make the OTDOA positioning method invalid in severe cases.

The standard AFLT positioning method of CDMA/CDMA2000 is similar in principle to the above-mentioned OTDOA positioning method. The mobile station also needs to use the downlink pilot signal of the base station to complete the phase measurement, and then calculate the position of the mobile station according to the hyperbolic positioning principle. Therefore, the repeater will also affect the positioning accuracy of AFLT, and even make the AFLT positioning method invalid in severe cases.

Contents of the invention

The purpose of the present invention is to solve the positioning problem of the mobile communication system in the repeater environment, and the provided positioning detection information is provided by the repeater, and then used by the mobile positioning center to eliminate the influence of the repeater on positioning, thereby improving the positioning accuracy A repeater with a positioning function in a mobile communication system and an auxiliary positioning method thereof.

In order to realize the purpose of the present invention, the technical solution adopted by the present invention is: a repeater with a positioning function in a mobile communication system, including: a radio frequency forwarding unit, a positioning control and operation maintenance unit, and a communication unit; the radio frequency forwarding unit Complete the signal forwarding function of the repeater; the radio frequency forwarding unit includes a forwarding antenna, a duplexer connected to the forwarding antenna, a radio frequency transceiver, and also includes a separate use between the duplexer and the radio frequency transceiver Two sets of circuits for transmitting uplink signals and downlink signals, wherein the uplink direction receives the signals output from the forwarding antenna to the duplexer, and then outputs to the base station through the low noise amplifier, frequency band selector, filter, and RF transceiver in turn; The communication unit completes the information sending and receiving function between the repeater and the base station; the positioning control and operation maintenance unit completes the control of the positioning unit and the operation and maintenance function of the repeater; it is characterized in that it also includes a positioning unit, and the input of the positioning unit The terminal receives the signal from the radio frequency transponder unit and is bidirectionally connected with the positioning control and operation maintenance unit. The positioning unit completes the uplink signal detection of one or more mobile stations according to the instructions of the positioning control and operation maintenance unit, and judges the Whether it belongs to the coverage area of the repeater.

The above-mentioned repeater with positioning function in the mobile communication system, wherein the positioning unit further includes a radio frequency channel and a positioning baseband processing module; wherein the radio frequency channel receives the uplink signal of the radio frequency forwarding unit, and performs radio frequency processing to obtain a baseband sampling signal , and then send the baseband sampling signal to the positioning baseband processing module; the positioning baseband processing module completes the detection of the signal of the specific mobile station, judges whether the signal of the specified mobile station exists, and sends the detection signal to the positioning control and operation and maintenance respectively unit and RF forwarding unit.

The repeater with positioning function in the above mobile communication system, wherein the radio frequency channel of the positioning unit includes a radio frequency filter, a low noise amplifier, a down converter and an analog/digital converter; The uplink signal forwarded by the transmitter is input to the radio frequency filter, and then output to the lower-level positioning baseband processing module after being processed by the low-noise amplifier, the down-converter and the analog-to-digital converter in turn.

The repeater with positioning function in the above mobile communication system, wherein the radio frequency channel of the positioning unit includes a radio frequency filter, a down converter and an analog/digital converter; the uplink signal output from the low noise amplifier of the radio frequency forwarding unit Input to the radio frequency filter, and then output to the lower-level positioning baseband processing module after being processed by the down-converter and the analog/digital converter in turn.

The repeater with positioning function in the above mobile communication system, wherein the radio frequency channel of the positioning unit includes a down converter and an analog/digital converter; the uplink signal output from the filter of the radio frequency forwarding unit is input to the down converter, And after being processed by the analog/digital converter, it is output to the lower-level positioning baseband processing module.

An auxiliary positioning method of a repeater with a positioning function is characterized in that it comprises the following steps:

a. The mobile positioning center initiates a location query request to the relevant base station of the mobile station as needed;

b. The base station receives and processes the location inquiry request of the mobile station, and then initiates a repeater positioning request to the repeater to which it belongs;

c. The repeater receives the request, detects and judges the mobile station, and then reports the repeater positioning response to the base station;

d. After receiving the response message, the base station will send a mobile station location response message to the mobile station positioning center;

e. The mobile positioning center uses the positioning results of the repeater to select an appropriate algorithm to eliminate the adverse effects of the repeater on positioning.

The above-mentioned assisted positioning method of a repeater with a positioning function, wherein, the process of the mobile positioning center in step a initiating a position query request to the relevant base station of the mobile station as required refers to: the mobile positioning center determines the position of a certain mobile station , initiate a query message for the location of the mobile station to the relevant base station to which the mobile station belongs.

In the above-mentioned assisted positioning method for a repeater with a positioning function, the position query message includes the identification of the mobile station to be queried, the query method, and the like.

The above-mentioned assisted positioning method for a repeater with a positioning function, wherein, the process of the base station receiving the query request described in step b and initiating a repeater positioning request to the repeater to which it belongs refers to that the base station responds to the received one or more The inquiry message of a mobile station is processed, and then a repeater positioning request message is synthesized and sent to the repeater to which the base station belongs.

The above-mentioned auxiliary positioning method for a repeater with a positioning function, wherein, the repeater positioning request message sent by the base station to the repeater includes the identification of the mobile station, the priority of the response, and the response time.

The above-mentioned assisted positioning method of repeater with positioning function, wherein, the detection and judgment described in step c refers to that the repeater utilizes the pilot signal of the known mobile station to detect multiple mobile stations in a serial or parallel manner. The mobile station signal is detected, and the signal detection process includes sliding correlation or matched filtering with the received signal, non-coherent accumulation, and multipath judgment to determine whether the mobile station signal exists.

The above-mentioned assisted positioning method of repeater with positioning function, wherein, the process of receiving the repeater positioning response by the base station described in step d and sending the mobile station position response to the mobile positioning center means that the base station responds to the received one or more Repeater location response messages are processed, and then the mobile station location response messages are sent to the mobile positioning center.

The above-mentioned assisted positioning method for a repeater with a positioning function, wherein the repeater positioning response message received by the base station includes information such as the identification of the mobile station and whether the mobile station is located in the coverage area of the repeater.

The above-mentioned assisted positioning method for a repeater with a positioning function, wherein the mobile station location response message sent by the base station to the mobile positioning center includes the identification of the mobile station, the identifier of the repeater to which the mobile station belongs, and the like.

The assisted positioning method of the above-mentioned repeater with positioning function, wherein, the identification mark of the mobile station is unique, and the repeater generates the local pilot signal of the mobile station through the mark, and sends the local pilot signal The signal detection and judgment of the mobile station are realized through coherent and non-coherent processing with the received signal.

Because the present invention adopts the above technical measures, therefore, the repeater of the present invention has a simple mobile station detection function, and can detect whether the mobile station is in the coverage area of the repeater, and this information can be used by the mobile positioning center. To eliminate the impact of repeaters on positioning. The invention can solve the positioning problem of the mobile communication system with repeater environment, and significantly improves the positioning accuracy. It is suitable for WCDMA or CDMA/CDMA2000 systems, and can be applied to various standard positioning such as cell-based positioning, WCDMA OTDOA positioning, and CDMA/CDMA2000 AFLT positioning.

Description of drawings

The specific characteristic performance of the present invention is further illustrated by the following examples and accompanying drawings.

Fig. 1 is a schematic diagram of the effect of repeaters on positioning in the prior art.

Fig. 2 is a schematic diagram of the influence of the repeater on the positioning measurement of the mobile station in the prior art.

Fig. 3 is a structural schematic diagram of the repeater of the present invention.

FIG. 4 is a schematic structural diagram of the radio frequency forwarding unit in FIG. 3 .

FIG. 5 is a schematic structural diagram of an embodiment of the radio frequency channel in FIG. 3 .

FIG. 6 is a structural schematic diagram of an embodiment of the radio frequency channel in FIG. 5 used in a repeater.

Fig. 7 is a schematic structural diagram of an embodiment of the radio frequency channel in Fig. 3 .

FIG. 8 is a structural schematic diagram of an embodiment of the radio frequency channel in FIG. 7 used in a repeater.

FIG. 9 is a schematic structural diagram of an embodiment of the radio frequency channel in FIG. 8 .

FIG. 10 is a structural schematic diagram of an embodiment of the radio frequency channel in FIG. 9 used in a repeater.

Fig. 11 is a schematic diagram of the repeater-assisted positioning process of the present invention.

Detailed ways

As shown in Figure 3, the repeater 1 with positioning function in the mobile communication system of the present invention includes: a radio frequency forwarding unit 11, a positioning control and operation maintenance unit 12, and a communication unit 13; The station 8 transmits the signal from the forwarding antenna 2 to forward the uplink signal, and at the same time receives the downlink signal from the base station 9, and forwards it to the mobile station through the forwarding antenna 2 to complete the basic repeater signal forwarding function; the positioning control and operation maintenance unit 12 completes the control of the positioning unit and the operation and maintenance of the repeater; the communication unit 13 completes the information sending and receiving function between the repeater and the base station 9 . It also includes a positioning unit 3 specially used for positioning, which is composed of two basic units of RF (radio frequency) channel 31 and positioning baseband processing 32 .

As shown in Figure 4, the radio frequency transponder unit 11 in the repeater 1 with positioning function in the mobile communication system of the present invention includes a duplexer 112 connected with the transponder antenna 2, a radio frequency transceiver 113, and also includes a Two groups of circuits between the duplexer 112 and the radio frequency transceiver 113 are respectively used to transmit uplink signals and downlink signals, wherein the uplink direction receives the signals output from the forwarding antenna 2 to the duplexer 112, and passes through the low-noise amplifier in turn. 114, frequency band selector 115, filter 116 to radio frequency transceiver 113 output to base station 9; Downlink direction receives the signal output from radio frequency transceiver 113 and passes through frequency band selector 117, filter 118, power amplifier 119 to duplexer successively 112, and then sent through the forwarding antenna 2. The radio frequency transceiver 113 in the radio frequency forwarding unit and the base station 9 can be connected by optical fiber, microwave or radio frequency (see Fig. 6, Fig. 8 and Fig. 10 for cooperation).

The input terminal of the positioning unit 3 forwards the obtained uplink signal from the repeater radio frequency forwarding unit 11, the signal is first sent to the RF channel module 31, and the baseband sampling signal is obtained through radio frequency processing, and then the baseband sampling signal is sent to the positioning baseband processing module 32 , the positioning baseband processing module 32 module detects the mobile station 8 designated by the base station 9 according to the positioning control information of the base station 9, and judges whether the mobile station is in the area covered by the repeater, and the detection result is finally reported to the mobile positioning center by the base station, Used to eliminate the impact of repeaters on positioning.

The detection of the mobile station signal by the positioning baseband processing module 32 utilizes the known pilot signal of the mobile station. The signal processing process includes but is not limited to steps such as sliding correlation or matched filtering with the received signal, non-coherent accumulation, and multipath judgment. The result of the detection is a determination of the presence or absence of a mobile station signal. The unit can detect signals of multiple mobile stations in series or in parallel.

The positioning control and operation maintenance unit 12 receives the positioning request signal from the base station, and controls the positioning baseband processing module to complete the detection of one or more mobile stations.

The positioning unit 3 of the present invention can adjust its access signal from the uplink direction according to different implementation methods, for example, output the received signal from the low noise amplifier in the uplink direction of the existing repeater, or output the received signal from the filter in the uplink direction , it is also possible to couple the signal directly from the repeater antenna. If the receiving signal is output from the low noise amplifier in the uplink direction of the existing repeater, the RF channel of the positioning unit of the present invention will save the small signal amplifier; if the receiving signal is output from the filter in the uplink direction, the positioning unit of the present invention The RF channel will save the small signal amplifier and RF filter. Please see the examples below.

See Figure 5. This is an embodiment of the RF channel 31 in the positioning unit 3 of the present invention, the RF channel 31 of the positioning unit in this embodiment includes a radio frequency filter 311, a low noise amplifier 312, a down converter 313 and an analog/digital converter 314, sequential connection.

See Figure 6. This is an embodiment of using the positioning unit in FIG. 5 to form a repeater of the present invention. The uplink signal forwarded from the radio frequency forwarding unit duplexer 112 is input to the radio frequency filter 311, and is sequentially processed by the low noise amplifier 312, the down converter 313 and the analog/digital converter 314, and then output to the lower-level positioning baseband processing module 32, The positioning baseband processing module 32 is bidirectionally connected with the positioning control and operation maintenance unit 12 .

Please refer to FIG. 7 , which is the second embodiment of the RF channel in the positioning unit of the present invention. The RF channel 41 of the positioning unit in this embodiment includes a radio frequency filter 411, a down converter 412 and an analog/digital converter 413, which are connected in sequence.

See Figure 8. This is an embodiment of using the positioning unit in FIG. 7 to form a repeater of the present invention. The uplink signal output from the low noise amplifier 114 of the radio frequency forwarding unit is input to the radio frequency filter 411, and after being processed by the down converter 412 and the analog/digital converter 413 in turn, it is output to the lower-level positioning baseband processing module 32, the positioning baseband The processing module 32 is bidirectionally connected with the positioning control and operation maintenance unit 12 .

Please refer to FIG. 9 , which is a third embodiment of the RF channel in the positioning unit of the present invention. In this embodiment, the RF channel 51 of the positioning unit 3 includes a down-converter 511 and an analog/digital converter 512 , which are connected in sequence.

See Figure 10. This is an embodiment of using the positioning unit in FIG. 9 to form a repeater of the present invention. The uplink signal output from the filter 116 of the radio frequency forwarding unit is input to the down-converter 511, and is output to the lower-level positioning baseband processing module 32 after being processed by the analog/digital converter 512, and the positioning baseband processing module 32 is connected with the positioning control and operation The maintenance unit 12 is bidirectionally connected.

The repeater of the invention can overcome the adverse effect of the existing repeater on positioning, and improve the practicability and positioning accuracy of the standard positioning method. Its auxiliary positioning method includes the following steps:

a. The mobile positioning center initiates a position query request to the relevant base station of the mobile station as required; the process is: when the mobile positioning center calculates the position of the mobile station, it will initiate a position query message of the mobile station to the relevant base station of the mobile station. The location query message includes the identification of the mobile station to be queried, the query method and so on.

b. The base station receives and processes the mobile station location query request, and then initiates a repeater positioning request to the repeater station to which it belongs; the process is: the base station processes the received query message of one or more mobile stations, and then synthesizes The repeater locates the request message and sends it to the repeater to which it belongs. The positioning request message includes the identification of the mobile station, the priority of the response, the response time and so on.

c. The repeater receives the request, detects and judges the mobile station, and then reports the repeater positioning response to the base station;

d. After receiving the response message, the base station will send the mobile station location response message to the mobile station positioning center; the process is that the base station processes the received one or more repeater location response messages, and then sends the mobile station location response message to Center the mobile. The repeater location response received by the base station includes information such as the identification of the mobile station and whether the mobile station is located in the coverage area of the repeater. The mobile station location response message sent by the base station to the mobile positioning center includes the identification mark of the mobile station, the mark of the repeater to which the mobile station belongs, and the like.

e. The mobile positioning center uses the positioning results of the repeater to select an appropriate algorithm to eliminate the adverse effects of the repeater on positioning.

The identification of the mobile station mentioned above can be used to uniquely identify the mobile station, and the repeater can generate the local pilot signal of the mobile station through the identification, and realize the mobile station through signal processing such as coherent operation with the received signal. Signal detection and judgment of the station.

Fig. 11 is an embodiment of the process of repeater assisted positioning in the present invention, the process can be briefly described as follows: the mobile positioning center initiates a position query request to the serving base station of the mobile station as needed, and the request is forwarded to the subordinate station by the base station/NODEB The repeater station receives the request, detects whether the mobile station is within the coverage area, and then reports the detection result to the mobile station positioning center through the base station. The mobile positioning center uses the detection results to select an appropriate algorithm to eliminate the adverse effects of repeaters on positioning.

The device and method are applicable to communication systems such as WCDMA or CDMA/CDMA2000, and are applicable to positioning based on cell, OTDOA, AFLT and other standards.

Claims (15)

1, has the repeater of positioning function in the mobile communication system, comprising: radio frequency retransmission unit, positioning control and Operation and Maintenance Unit and communication unit; Described radio frequency retransmission unit is finished the signal forwarding function of repeater; This radio frequency retransmission unit comprises forwarding antenna, a duplexer that is connected with this forwarding antenna, one radio-frequency (RF) transceiver, also comprise the two groups of circuit that are respectively applied for transmission upward signal and downstream signal that are arranged between this duplexer and the radio-frequency (RF) transceiver, wherein, up direction receives the signal of output from the forwarding antenna to the duplexer, and outputs to the base station through LNA device, frequency range selector, filter to radio-frequency (RF) transceiver successively; Communication unit is finished the information transmit-receive function between repeater and base station; Positioning control and Operation and Maintenance Unit are finished the Operation and Maintenance function to the control of positioning unit and repeater; It is characterized in that, also comprise locating unit, the input of this positioning unit receives the signal from the radio frequency retransmission unit, and be connected with positioning control and Operation and Maintenance Unit are two-way, whether this positioning unit is finished according to the instruction of positioning control and Operation and Maintenance Unit the upward signal of one or more travelling carriages is detected, and adjudicate this travelling carriage and belong in the overlay area of this repeater.

2, the repeater that has positioning function in the mobile communication system according to claim 1 is characterized in that, described positioning unit further comprises radio-frequency channel and location baseband processing module; Wherein, the upward signal of radio-frequency channel received RF retransmission unit, and carry out radio frequency processing and obtain the baseband sampling signal, give the location baseband processing module this baseband sampling signal then; The location baseband processing module is finished the detection to specific mobile station signal, and whether the signal of judging the travelling carriage of appointment exists, and detection signal is delivered to positioning control and Operation and Maintenance Unit and radio frequency retransmission unit respectively.

3, the repeater that has positioning function in the mobile communication system according to claim 2 is characterized in that, the radio-frequency channel of described positioning unit comprises radio-frequency filter, LNA device, low-converter and A/D converter; The upward signal of transmitting from a duplexer of radio frequency retransmission unit is input to radio-frequency filter, and outputs to subordinate's location baseband processing module successively after the processing of LNA device, low-converter and A/D converter.

4, the repeater that has positioning function in the mobile communication system according to claim 2 is characterized in that, the radio-frequency channel of described positioning unit comprises radio-frequency filter, low-converter and A/D converter; The upward signal of exporting from the LNA device of radio frequency retransmission unit is input to radio-frequency filter, and outputs to subordinate's location baseband processing module successively after the processing of low-converter and A/D converter.

5, the repeater that has positioning function in the mobile communication system according to claim 2 is characterized in that, the radio-frequency channel of described positioning unit comprises low-converter and A/D converter; The upward signal of exporting from the filter of radio frequency retransmission unit is input to low-converter, and outputs to subordinate's location baseband processing module after the processing of A/D converter.

6, a kind of assisted location method with repeater of positioning function is characterized in that, may further comprise the steps:

A, mobile positioning center are initiated the position enquiring request to the relevant base station of travelling carriage as required;

B, base station receiving mobile position enquiring request are also handled, and initiate the repeater Location Request to affiliated repeater then;

C, repeater receive this request, and travelling carriage is detected and adjudicates, and report the repeater location response to the base station then;

The location of mobile station response message will be sent out to the mobile position estimation center after receiving response message in d, base station;

E, mobile positioning center utilize the positioning result of repeater to select suitable algorithm, eliminate the adverse effect of repeater to the location.

7, the assisted location method with repeater of positioning function according to claim 6, it is characterized in that, the described mobile positioning center of step a is meant to the process that the position enquiring request is initiated in the relevant base station of travelling carriage as required: mobile positioning center when determining certain location of mobile station, under this travelling carriage relevant base station initiate the query messages of this location of mobile station.

8, the assisted location method with repeater of positioning function according to claim 7 is characterized in that, described position enquiring message comprises the identification marking of the travelling carriage of needs inquiry, the mode of inquiry etc.

9, the assisted location method with repeater of positioning function according to claim 6, it is characterized in that, the described base station of step b receives query requests and is meant to the process that the repeater Location Request is initiated in affiliated repeater, handle the query messages of one or more travelling carriages of receiving the base station, and synthetic then repeater locating request message is also issued the repeater under this base station.

10, the assisted location method with repeater of positioning function according to claim 9 is characterized in that, the repeater locating request message that described base station sends to the repeater comprises the priority, response time of identification marking, the response of travelling carriage etc.

11, the assisted location method with repeater of positioning function according to claim 6, it is characterized in that, described detection of step c and judgement are meant, the repeater utilizes the pilot signal of the travelling carriage that knows to adopt the mode of serial or parallel that a plurality of mobile station signals are detected, wherein signal detection process comprises and slides relevant with received signal or matched filtering, noncoherent accumulation, multi-path judging, determines whether mobile station signal exists.

12, the assisted location method with repeater of positioning function according to claim 6, it is characterized in that, steps d described base station reception repeater location response and the process that responds to mobile positioning center transmission location of mobile station are meant, handle one or more repeaters location response message of receiving the base station, then the location of mobile station response message is issued mobile positioning center.

13, the assisted location method with repeater of positioning function according to claim 12, it is characterized in that the repeater location response message that described base station receives comprises the identification marking of travelling carriage, the information such as overlay area whether travelling carriage is positioned at this repeater.

14, the assisted location method with repeater of positioning function according to claim 12, it is characterized in that the location of mobile station response message that mobile positioning center is mail in described base station comprises the identification marking of travelling carriage, the sign of the repeater under the travelling carriage etc.

15, according to Claim 8 each described assisted location method in 10,13,14, with repeater of positioning function, it is characterized in that, the identification marking of described travelling carriage is unique, the repeater identifies the local pilot signal that produces travelling carriage by this, and should this locality pilot signal and received signal realize input and judgement by relevant and incoherent processing to travelling carriage.

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