KR20030046682A - Radio network controller/node b for detecting position of user equipment using differential global positioning system in mobile communication system - Google Patents

Abstract

PURPOSE: A base station determination apparatus using a DGPS(Differential Global Positioning System) in a mobile communication system is provided to avoid a hardware installation and thus save a space, and measure a position accurately. CONSTITUTION: When a GPS signal is received through a GPS antenna(511), it is outputted to a network synchronization board(500) consisting of a GPS receiver(510), a synchronization providing block(520) and a DGPS providing block(530). The GPS receiver(510) extracts time information on the basis of the received GPS signal and outputs it to the synchronization providing block(520). Then, the synchronization providing block(520) generates a synchronous clock and outputs it to an H/W board(540). The H/W board(540) synchronizes a network with the synchronous clock. The GPS receiver(510) extracts latitude, longitude and altitude information on the basis of the GPS signal and outputs the information to the DGPS providing block(530). Then, the DGPS providing block(530) calculates a position of a base station system and an error between the position of the base station system and a specific position of the base station and outputs it to an RF(Radio Frequency) terminal(550). Then, the RF terminal(550) processes the error value to an RF signal and transfers it to a user terminal. Accordingly, the user terminal locates its position accurately by correcting its position on the basis of the error value.

Description

Base station positioning device using differential global positioning system in mobile communication system

The present invention relates to a base station positioning system in a mobile communication system, and more particularly, to a base station positioning apparatus using a differential worldwide positioning system.

1 is a schematic diagram of a typical wideband code division multiple access communication system.

The Wideband Code Division Multiple Access (WCDMA), which is a communication method of a mobile communication system, is illustrated in FIG. 1 by a user equipment (UE) 111. The Radio Network Controller (RNC) 113 is in charge of all processes related to the connection of the UE. The radio network controller 113 is responsible for resource allocation for user terminals accessing one or more base stations (Node Bs) 115, 117, and 119. A communication system composed of the plurality of base stations 115, 117, and 119 and the radio network controller 113 is called a UTRAN (UMTS Terrestrial Radio Access Network).

In addition, the wireless network controller 113 and the base stations 115, 117, and 119 described above may use the Global Positioning System (GPS) to obtain location information about the user terminal 111. You get it. The radio network controller 113 and the base stations 115, 117, and 119 will be referred to as " RNC / Node B system ", wherein the global positioning system is a plurality of worldwide positioning systems. It is a system for acquiring visual information and location information using satellites. Thus, the base station system acquires the location information where the user terminal 111 is currently located by using the time information and the location information measured by the global location measurement system.

By the way, there is a positioning system that provides the location information for the user terminal 111 more accurately than the location information provided by the global positioning system, thus positioning system that provides more accurate position information than the global positioning system Differential Global Positioning System (DGPS) and Inverted Differential Global Positioning System (IDGPS) are available. The differential global position measurement system and the inverted differential global position measurement system measure the position of the user terminal 111 by correcting the pseudorange of the user terminal 111 using the pseudo distance correction information of the base station system. As a system, the position of the user terminal 111 is measured in consideration of a clock error and an atmospheric error.

That is, the differential worldwide positioning system and the inverted differential worldwide positioning system first receive a pseudo distance measured by the user terminal 111 itself from the user terminal 111, and then receive the pseudo distance received from the user terminal 111. The pseudo pseudo distance of the user terminal 111 is detected using a distance and a pseudo distance correction value of a base station system to which the differential global position measuring system and the inverted differential worldwide position measuring system are connected. Thus, the base station system accurately detects the position of the user terminal 111 based on the pseudo pseudo distance of the user terminal 111 and the distance of the global positioning system satellite.

In general, the current mobile communication system selects one of the differential global position measurement system or the inverted differential global position measurement system (in the following description, a differential global position measurement system is used as an example for convenience. The differential global positioning system is not implemented in the base station system. In other words, the differential worldwide positioning system is implemented as a differential worldwide positioning system server separate from the base station system.

This will be described with reference to FIG. 2.

FIG. 2 is a schematic diagram of a typical wideband code division multiple access communication system using a differential global positioning system.

Referring to FIG. 2, the base station system 210 receives satellite signals from a plurality of, for example, four global positioning system satellites 211, 213, 215, and 217 to receive time information and Acquire location information, and user terminals 111 also receive satellite signals from the global positioning system satellites 211, 213, 215, 217 to obtain visual information and location information. do. In addition, the differential worldwide positioning system server 200 is implemented in a form of a reference station separate from the base station system 210 so that the pseudo distance of the user terminal 111 using the pseudo distance correction information of the base station system 210. Pseudorange is corrected to measure the position of the user terminal 111.

Next, an internal configuration of the network synchronization board of the base station system 210 will be described with reference to FIG. 3.

3 is a block diagram showing the internal configuration of a network synchronization board of a conventional base station system.

Referring to FIG. 3, when a global positioning system signal is received through a GPS antenna 311, a signal received through the antenna 311 is output to a network synchronization board 300. do. The network synchronization board 300 includes the global positioning system receiver (GPS Receiver) 310 and the synchronization providing block (320). The global positioning system receiver 310 extracts the visual information using the received global positioning system satellite signal and outputs the visual information to the synchronization providing block 320. Then, the synchronization providing block 320 generates a synchronization clock for use as a network synchronization of the base station system using the time information provided by the global positioning system receiver 310 to generate a hardware board (H / W board). 330). The hardware board 330 then synchronizes the network with the synchronization clock received from the synchronization providing block 320.

As a result, in the conventional mobile communication system, as described above with reference to FIG. 2, the base station system and the differential worldwide positioning system are implemented in a separate server form, which causes a large waste of hardware and a lot of space. There was. In addition, as described with reference to FIG. 3, the network synchronization board of the base station system did not use the global positioning system efficiently by simply providing visual synchronization.

Accordingly, an object of the present invention is to provide a base station positioning apparatus using a differential worldwide position measurement system in a mobile communication system.

The present invention for achieving the above object; A base station positioning apparatus using differential global positioning system in a mobile communication system, comprising: receiving signals received from a plurality of global positioning system satellites and outputting time information and position information of the base station from the signals; Differential worldwide position measurement that calculates a position value of the base station using a position measuring system receiver and position information of the base station, compares the calculated position value with a preset position value for the base station, and calculates an error thereof. System-supplied blocks.

1 is a schematic diagram of a typical wideband code division multiple access communication system.

2 is a schematic illustration of a typical broadband code division multiple access communication system utilizing a differential global positioning system;

Figure 3 is a block diagram showing the internal configuration of the network synchronization board of a conventional base station system

4 is a schematic diagram of a wideband code division multiple access communication system for a differential global positioning system performing a function in an embodiment of the present invention;

5 is a block diagram showing an internal configuration of a network synchronization board of a base station system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

4 is a schematic diagram of a wideband code division multiple access communication system for a differential global positioning system performing a function in an embodiment of the present invention.

Before describing FIG. 4, the wideband code division multiple access (WCDMA) is a communication method of a mobile communication system, and as described with reference to FIG. All processes related to a connection of a user equipment (UE) are connected to a radio network controller (RNC) and the radio network controller 113 to handle resource allocation for the user terminals. It consists of one or more base stations (Node B). The radio network controller and the base stations will be referred to as a "base station system (RNC / Node B system)".

Referring to FIG. 4, the base station system 410 includes a plurality of, for example, four Global Positioning System (GPS) satellites 211, 213, 215, and 217. Receiving a satellite signal from the to obtain the time information and location information, and the user equipment (UE) (411) is also the global positioning system satellites 211, (213), (215), ( Receiving a satellite signal from 217 to obtain time information and location information. In the embodiment of the present invention, the base station system 410 performs a function of a differential global positioning system (DGPS). Here, the differential worldwide position measuring system is a system for measuring the position of the user terminal 411 by correcting a pseudorange of the user terminal 111 using the pseudo distance correction information of the base station system 410. The position of the user terminal 411 is measured in consideration of a clock error and an atmospheric error.

That is, the differential worldwide position measuring system first receives a pseudo distance measured by the user terminal 411 itself from the user terminal 411, and measures the pseudo distance received from the user terminal 411 and the differential worldwide position. The pseudo pseudo distance of the user terminal 411 is detected using the pseudo distance correction value of the base station system 410 to which the system is connected. Thus, the base station system 410 accurately detects the position of the user terminal 411 with the corrected pseudo distance of the user terminal 411 and the distance of the global positioning system satellite.

Next, an internal configuration of the network synchronization board of the base station system 410 will be described with reference to FIG. 5.

5 is a block diagram showing the internal configuration of a network synchronization board of a base station system according to an embodiment of the present invention.

Referring to FIG. 5, when a global positioning system signal is received through a GPS antenna 511, a global positioning system satellite signal received through the antenna 511 may be a network synchronization board. Is output to 500. The network synchronization board 500 includes the global positioning system receiver (GPS Receiver) 510, a synchronization providing block 520, and a differential worldwide positioning system (DGPS) providing block 530. .

The global positioning system receiver 510 extracts the time information using the received global positioning system satellite signal and outputs the visual information to the synchronization providing block 520. Then, the synchronization providing block 520 is a synchronization clock for using the time information provided by the global positioning system receiver 510 as a network synchronization of the base station system with time information such as 1PPS, TOD, for example. ) Is generated and output to the hardware board (H / W board) (540). The hardware board 540 then synchronizes the network with the synchronization clock received from the synchronization providing block 520.

Meanwhile, the global positioning system receiver 510 extracts the latitude, longitude, and altitude information from the received global positioning system satellite signal and outputs the latitude, longitude, and altitude information to the differential worldwide positioning system providing block 530. The differential global positioning system providing block 530 then calculates the position of the base station system 410 using the latitude, longitude, and altitude information provided by the global positioning system receiver 510, and calculates the position of the base station system 410. The error, which is a difference from the inherent position of the N1, is calculated and output to the radio frequency (RF) stage 550.

Here, the differential worldwide positioning system providing block 530 is (1) the base station system by calculating with a geometric trigonometric algorithm (algorithm) with the latitude, longitude, altitude information output from the global positioning system receiver 510 Calculate the position of 410. (2) Since the base station system 410 is not a moving object, an error is calculated by comparing the unique position information of the base station system 410 itself with the calculated position of the base station system 410. The reason for the error between the positions of the base station system 410, which calculates the unique position information of the base station system 410 itself, is because of a pseudorange, a clock error, an atmospheric error, and the like. (3) The position information between the base station system 410 and the position error calculated from the satellite positioning signals of the global positioning system are output to the radio frequency terminal 550.

Then, the radio frequency terminal 550 processes the error value output from the differential worldwide position measurement system providing block 530 and transmits the radio frequency signal to the user terminal 411. Then, the user terminal 411 corrects the position of the user terminal 411 itself with the error value received from the base station system 410 to accurately find its position.

That is, when the user terminal 411 receives the error value calculated in the differential worldwide positioning system providing block 530 of the base station system 410, the user terminal 411 is calculated with previously received worldwide positioning system satellite signals. The position of the user terminal 411 itself is corrected with the received error value. Therefore, the user terminal 411 detects its own accurate position value considering the error generated from a plurality of error factors such as clock error and atmospheric error.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, according to the present invention, since the base station system directly performs the position measurement using the differential global position measurement system in the mobile communication system, the differential worldwide position measurement system does not need to be implemented in a separate server form, so that the hardware ( It has the advantage of eliminating hardware waste. In addition, since the differential worldwide positioning system does not need to be implemented in a separate server form, there is an advantage of eliminating waste in space. In addition, the network synchronization board of the base station system has the advantage that not only the network synchronization but also the accurate position measurement by using the differential global position measurement system to effectively use the global position measurement system.

Claims (2)

A base station positioning apparatus using differential global positioning system in a mobile communication system, A global positioning system receiver for receiving signals received from a plurality of global positioning system satellites and outputting time information and position information for the base station from the signals; And a differential worldwide position measurement system providing block for calculating a position value of the base station using the position information of the base station, comparing the calculated position value with a preset position value for the base station, and calculating an error thereof. Base station positioning apparatus using differential global positioning system in a mobile communication system characterized in that. The method of claim 1, The location information base station positioning apparatus using a differential worldwide positioning system in the mobile communication system, characterized in that the latitude, longitude, altitude information for the base station.