CN100455103C - Repeater Monitoring System and Method for Using the System to Realize Mobile Positioning - Google Patents

Abstract

The present invention relates to a repeater monitoring system and a method for providing mobile positioning information by using the repeater monitoring system. By configuring repeater-related information in the repeater monitoring system, it includes: configuring repeater position information, Configure donor base station or donor repeater number information, configure coverage information, configure forwarding direction angle information, configure antenna pitch angle information, configure transmission delay information, and configure propagation delay information to provide positioning information for mobile communication systems Basic information to support mobile positioning services. The invention provides basic information required for positioning, improves positioning accuracy, provides new service upgrades without increasing hardware equipment of existing repeaters, and is simple to operate, convenient to expand, and easy to project management.

Description

Repeater Monitoring System and Method for Using the System to Realize Mobile Positioning

technical field

The invention relates to a system and method for realizing positioning value-added services in the field of 3G mobile communication, in particular to a system and method for collecting wireless positioning information in a WCDMA mobile communication system.

Background technique

Currently, the WCDMA mobile communication system supports the following three positioning technologies.

(1) Positioning technology based on Cell ID (cell identification)

(2) OTDOA-based positioning technology

(3) GPS positioning technology based on network assistance

Among them, technology 1 can generally only locate a certain base station or a certain sector of a base station, and its positioning accuracy depends on the density of base stations, and the positioning error is generally greater than 200 meters. The introduction of repeaters has little effect on the positioning accuracy of this method. Not discussed here. The positioning of technology 3 is realized by calculating the position of the mobile station through the GPS module of the mobile station receiving satellite signals and the auxiliary GPS information provided by the mobile network. Therefore, if the repeater cooperates with such a positioning system, the additional time delay introduced and the change of the direction of the wireless signal will not affect the performance of the network-assisted GPS positioning, and the main discussion will not be made here. The present invention is mainly discussed based on the support of Technology 2.

The principle of positioning based on OTDOA (Observed Time Difference Of Arrival) is shown in Figure 1. By measuring the propagation delay difference of signal arrival between two different base stations and mobile stations (the measured signal is transmitted by the base station antenna, the measured at the receiving antenna of the mobile station) to obtain the distance difference between the mobile station and the two base stations, and thus obtain a pair of hyperbolas with the two base stations as the focus. By measuring two sets of OTDOA values, two pairs of hyperbolas can be obtained, and the two intersection points of these two pairs of hyperbolas are the possible estimated positions of the mobile station, and then use RTT (loop transmission delay) or Cell ID to select one of them One may estimate the position, resulting in an estimated position of the mobile station.

Among the above-mentioned positioning technology based on Cell ID (cell identification), the positioning technology based on wireless signal measurement between the base station and the mobile station, and the positioning technology based on GPS in the wireless positioning of the WCDMA mobile communication system, the QoS of the mobile communication network according to the positioning client request positioning (Quality of Service) and network conditions, choose one or a mixed strategy of several positioning technologies to provide customers with positioning services. In the weak signal area and blind area of the wireless communication coverage area, in order to improve better network coverage, operators will introduce a large number of repeaters to eliminate blind areas or improve signal quality. However, due to the change of the transmission direction of the wireless signal by the repeater and the increase of the transmission delay, the positioning accuracy within the coverage of the repeater will be greatly reduced or even cause wrong positioning.

Therefore, there are defects in the prior art and need to be improved and developed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a repeater monitoring system and a method for realizing mobile positioning by using the repeater monitoring system. The repeater monitoring system provides the basic information required for positioning, and finally can well support In the method of mobile positioning service, when the repeater is introduced in the range that the base station signal of the WCDMA mobile communication network cannot cover, the basic information required for positioning can be provided through the method of the present invention, and the wrong positioning can be finally corrected and the positioning accuracy can be improved, so as to realize high The high-quality positioning value-added service eliminates the destruction of the original cell coverage caused by it, and eliminates the defects that seriously affect the positioning accuracy of the mobile station in the cell and even cause wrong positioning. Moreover, the present invention utilizes the existing repeater monitoring system to provide information for the positioning service, and the realization method is simple and easy to operate.

In order to achieve the above-mentioned purpose of the invention, the present invention proposes a method for realizing mobile positioning by a repeater monitoring system, which is characterized in that configuring repeater-related information in the repeater monitoring system includes: configuring repeater position information , configure the number information of the donor base station or the donor repeater, configure the coverage information, configure the forwarding direction angle information, configure the antenna pitch angle information, configure the transmission delay information, and configure the propagation delay information; The relevant information of the repeater, and use different base stations or repeaters to perform two OTDOA position estimation calculations on all hypothetical paths for the mobile station to communicate with at least three surrounding base stations or repeaters serving the base station, and obtain The two position estimates under the hypothetical path, and then calculate the distance between the two position estimates under each hypothetical path as the error, and verify the error, and finally take the position estimate of the hypothetical path with the smallest error as the mobile station position, that is The mobile positioning of the mobile communication system can be realized.

The above-mentioned method for realizing the mobile positioning of the repeater monitoring system is characterized in that the process of realizing the mobile positioning of the mobile communication system comprises the following steps:

Obtain all hypothetical paths for the mobile station to communicate with at least three surrounding base stations or repeaters serving the base station;

In each hypothetical path, assuming that the first base station or the repeater serving the first base station is the reference station, by measuring the reference station and the second base station or the repeater serving the second base station and the mobile station The propagation delay difference between signal arrivals, the distance difference between the mobile station and the two sites is obtained, and a pair of first hyperbolas with these two sites as the focus are obtained;

By measuring the propagation delay difference between the reference station and the third base station or the repeater serving the third base station and the mobile station, the distance difference between the mobile station and the two stations is obtained, and a pair of A second hyperbola with these two sites as focal points;

Obtaining the possible estimated position of the mobile station through the measured intersection of the first hyperbola and the second hyperbola, and selecting one of the possible estimated positions by using the loop transmission delay or the cell identity to obtain the first estimated position of the mobile station;

By measuring the propagation delay difference between two base stations or repeaters and the mobile station except the reference station, the distance difference between the mobile station and the two stations is obtained, and a pair of the two stations is obtained. the third hyperbola of the focus;

performing verification using the corresponding third hyperbola to obtain a second estimated position, and calculating an error between the second estimated position and the first estimated position;

Repeat the steps of obtaining the error above to obtain the error of all hypothetical paths;

Take the path with the smallest error among all hypothetical paths as the path mode of the mobile station;

The first estimated position estimate obtained by performing position estimation in the access mode is taken as the position of the mobile station.

The method for realizing mobile positioning by the above-mentioned repeater monitoring system is characterized in that, for a path where a repeater participates in signal transmission, the transmission time of the signal received by the mobile station from the base station to which it belongs should be subtracted from the transmission time of the repeater. Latency and Propagation Delay.

The method for realizing mobile positioning by the above-mentioned repeater monitoring system is characterized in that when the repeater is connected to the network, the related information of the repeater is also imported into the positioning entity database of the repeater monitoring system on the side of the service wireless network controller In order to reduce the information interaction between the repeater and the network, and shorten the response time of the positioning service.

The above-mentioned method for implementing mobile positioning by the repeater monitoring system is characterized in that the configuration of the relevant information of the repeater is not time-sequential.

The above-mentioned method for implementing mobile positioning by the repeater monitoring system is characterized in that the repeater is deployed in the form of one repeater for each sector without cascading.

The present invention also provides a repeater monitoring system, which is characterized in that the repeater monitoring system is configured on the service wireless network controller side, including:

The information configuration module is used to configure related information of the repeater, including: configuring the position information of the repeater, configuring the number information of the donor base station or the donor repeater, configuring the coverage information, configuring the forwarding direction angle information, configuring the antenna pitch angle information, Configure transmission delay information and configure propagation delay information;

The positioning calculation center module is used to perform two OTDOA position estimation calculations on all hypothetical paths for the mobile station to communicate with at least three surrounding base stations or repeaters serving the base stations using different base stations or repeaters to obtain the hypothetical path Then calculate the distance between the two position estimates under each hypothetical path as an error, and verify the error, and take the position estimate of the hypothetical path with the smallest error to determine the position of the mobile station.

The above-mentioned repeater monitoring system is characterized in that it also includes:

The positioning entity database module is used to import and store relevant information of the repeater when the repeater is connected to the network.

The above-mentioned repeater monitoring system is characterized in that the information configuration module is set in the foreground monitoring board or background monitoring database of the repeater monitoring system.

The advantage of the present invention is that the monitoring system of the repeater is skillfully used to provide the basic information required for positioning and improve the positioning accuracy. On the condition of not increasing the hardware equipment of the existing repeater, it provides a new service upgrade, and is easy to operate, easy to expand, and easy to project management.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Fig. 1 is the OTDOA positioning principle diagram in the 3G communication system of prior art;

Fig. 2 is a flow chart of OTDOA hypothesis verification and positioning in the present invention.

Detailed ways

For ease of description and illustration, two frequently mentioned concepts are defined in the method of the present invention: the error is defined as the distance between an estimated position of the mobile station and another estimated position; Hyperbola between two base stations (repeaters) except the reference base station (repeater) during position estimation; transmission delay is defined as the delay between the input signal and output signal of the repeater; propagation delay is defined as the direct The propagation time of radio waves between the station and the base station.

According to the method of the present invention, first set the data about the repeater information in the repeater monitoring system, including repeater position, donor base station number or donor repeater number, coverage, forwarding direction angle, antenna pitch angle , transmission delay T _RPT and propagation delay T _UTRAN-RPT and so on. At the same time, in order to reduce the information interaction between the repeater and the network and shorten the response time of the positioning service, the information is imported into the positioning entity database on the SRNC side when the repeater is connected to the network. The location estimation calculation is performed under multiple hypothetical paths, and the corresponding third pair of hyperbolic verification is used to obtain the error. The location estimation under the path with the smallest error is taken as the position of the mobile station, and finally the support of the repeater to the positioning service is realized.

The support of OTDOA positioning method can be analyzed and explained in detail in combination with the principle in Figure 1 and the process in Figure 2 (the dotted box in Figure 2 is to illustrate the complete process of the positioning service, which needs to be implemented on the SRNC side).

Based on the description of the OTDOA technology in the background technology, assuming that the first base station A is a reference site, by measuring the propagation delay difference between the reference site A and the second base station B and the mobile station, the difference between the mobile station and the mobile station is obtained. The distance difference of two stations, obtain a pair of the first hyperbola (shown in the solid line in the figure) with these two stations as focus; Then by measuring the signal between the reference station A and the third base station C and the mobile station Propagation delay difference of arrival, obtain the distance difference between this mobile station and these two sites, obtain a pair of second hyperbolas (shown by dotted lines in the figure) with these two sites as the focus; then through the measured first The possible estimated position of the mobile station is obtained from the intersection of the hyperbola and the second hyperbola, and the first estimated position D of the mobile station is obtained by selecting one of the possible estimated positions by using the loop transmission delay or the cell identity. At the same time, it can also be known that the hyperbola (third hyperbola) between the second base station B and the third base station C is not used in the position estimation calculation, and this hyperbola pair can be used for verification. Theoretically, if the estimated position D is correct, then the hyperbola should pass through the estimated position D as well.

As shown in Figure 1, assuming that a repeater R is introduced to serve base station A, and neither the network system nor the mobile station knows its existence (that is, it is impossible to know whether the two-way communication between the mobile station and the base station is relayed through the repeater R), the positioning calculation The center first performs position estimation calculation in the manner described in Figure 1 (regardless of the influence of the repeater R), and then uses the third pair of hyperbolas to verify a position estimate, that is, the third hyperbola and the first hyperbola are obtained through measurement Or the intersection point of the second hyperbola, select the intersection point closest to the first estimated position as the second estimated position, and calculate the error of the two estimated positions. Then, assuming that the repeater R participated in the transmission of the signal, the position of the base station A is replaced by the position of the repeater R, and then the position estimate is recalculated using the OTDOA scheme. At this time, the transmission time of the mobile station receiving the signal from the base station A is also T _UTRAN-RPT and T _RPT should be subtracted. In the same way, another error is obtained by using the corresponding third pair of hyperbolic verifications. After two error comparisons, the transmission path with the smaller error is selected as the wireless signal transmission path between the mobile station and the base station. Knowing whether the wireless signal is transmitted through the repeater R, the estimation of the position of the mobile station under this transmission path can be obtained.

Similarly, for repeater deployment in most engineering plans (one repeater is configured in one sector without cascading, as shown in Figure 2), there are only 8 calculations and hypothesis verification at most. That is to say, there are at most 8 (exhaustive) possible combinations for the mobile station to receive signals from the surrounding 3 base stations or their repeaters. The position estimation under the transmission path mode with the smallest error is the estimated position of the mobile station, based on the method of measurement, calculation and verification of the signal path mode of exhaustion and hypothesis verification, for the cascade connection of repeaters (such as coverage along the railway) The positioning accuracy of the problem can also be improved. At the same time, because the positioning response time of the OTDOA scheme is mainly consumed in the measurement rather than the position estimation calculation on the SRNC side, even exhaustive calculations can basically achieve the same response time as the OTDOA scheme.

In summary, from the above-mentioned analysis of the OTDOA positioning method supported by the WCDMA mobile communication system in the case of introducing a repeater, it can be drawn that the positioning information provided by the method of the present invention can effectively improve the repeater network at last. The positioning accuracy of the mobile station at the same time enables the repeater to better support the positioning service.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (9)

1, a kind of direct amplifying station monitoring is realized the method for running fix, it is characterized in that, configuration repeater relevant information in direct amplifying station monitoring comprises: configuration repeater positional information, configuration donor base station or alms giver repeater number information, configuration coverage information, configuration routing direction angle information, configuration antenna elevation angle information, configuration propagation delay time information and configuration propagation delay information;

By adopting relevant information in this repeater of service wireless network controller side configuration, and to travelling carriage and at least three base stations on every side or serve all hypothesis paths of the repeater of this base station communicating by letter and utilize different base stations or repeater to carry out twice OTDOA location estimation to calculate, obtain two location estimation under this hypothesis path, calculate distance between each hypothesis path following two location estimation then as error, and verify described error, the location estimation of finally getting the hypothesis path of minimal error is a location of mobile station, can realize the running fix of mobile communication system.

2, direct amplifying station monitoring according to claim 1 is realized the method for running fix, it is characterized in that the process of the running fix of this realization mobile communication system comprises the steps:

Obtain this travelling carriage and at least three base stations on every side or serve all hypothesis paths of communicating by letter in the repeater of this base station;

In each hypothesis path, the repeater of supposing first base station or serving this first base station is a referenced stations, by measure this referenced stations and second base station or serve the repeater of this second base station and this travelling carriage between the propagation delay that arrives of signal poor, obtain the range difference of this travelling carriage and these two websites, obtain a pair of first hyperbola that is focus with these two websites;

By measure this referenced stations and the 3rd base station or serve the repeater of the 3rd base station and this travelling carriage between the propagation delay that arrives of signal poor, obtain the range difference of this travelling carriage and these two websites, obtain a pair of second hyperbola that is focus with these two websites;

By the possible estimated position that first hyperbola that measures and the second hyp intersection point obtain this travelling carriage, utilizing loop propagation delay time or cell ID to accept or reject one of them may estimated position, obtains first estimated position of this travelling carriage;

Poor by the propagation delay of measuring signal arrival between two base stations except that referenced stations or repeater and this travelling carriage, obtain the range difference of this travelling carriage and these two websites, obtain a pair of the 3rd hyperbola that is focus with these two websites;

Utilize corresponding the 3rd hyperbola to verify and obtain second estimated position, calculate the error of this second estimated position and this first estimated position;

Repeat the step of above-mentioned acquisition error, obtain the error of all hypothesis paths;

The path of getting error minimum in all hypothesis paths is the path mode of travelling carriage;

Get and carry out first estimated position that location estimation draws under this path mode and be estimated as location of mobile station.

3, direct amplifying station monitoring according to claim 2 is realized the method for running fix, it is characterized in that, to there being the repeater to participate in the path of signal transmission, this travelling carriage receives that the transmission time of its affiliated signal of base station should deduct the propagation delay time and the propagation delay of this repeater.

4, realize the method for running fix according to the described direct amplifying station monitoring of above-mentioned arbitrary claim, it is characterized in that, when networking in the repeater, also import in the position determining entity database of service wireless network controller side direct amplifying station monitoring by relevant information with this repeater, to reduce the information interaction between repeater and the network, shorten the positioning service response time.

5, direct amplifying station monitoring according to claim 1 is realized the method for running fix, it is characterized in that the configuration of the relevant information of described repeater is regardless of sequential.

6, direct amplifying station monitoring according to claim 4 is realized the method for running fix, it is characterized in that the mode of laying of this repeater is repeater of a sector configuration and does not have cascade.

7, a kind of direct amplifying station monitoring is characterized in that, this direct amplifying station monitoring is configured in the service wireless network controller side, comprising:

Information collocation module, be used to dispose the repeater relevant information, comprise: configuration repeater positional information, configuration donor base station or alms giver repeater number information, configuration coverage information, configuration routing direction angle information, configuration antenna elevation angle information, configuration propagation delay time information and configuration propagation delay information;

The location Calculation center module, be used for travelling carriage and at least three base stations on every side or serve all hypothesis paths of the repeater of this base station communicating by letter and utilize different base stations or repeater to carry out twice OTDOA location estimation to calculate, obtain two location estimation under this hypothesis path, calculate distance between each hypothesis path following two location estimation then as error, and verify described error, and the location estimation of getting the hypothesis path of minimal error is defined as location of mobile station.

8, direct amplifying station monitoring according to claim 7 is characterized in that, also comprises:

The position determining entity database module when being used for networking in the repeater, importing this repeater relevant information and store.

9, direct amplifying station monitoring according to claim 7 is characterized in that, described information collocation module is arranged in the foreground monitor board or backstage supervision database of this direct amplifying station monitoring.

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