KR20010091092A - Method for beginning base station of mobile communication system - Google Patents

Abstract

PURPOSE: A method for initializing a BTS(Base Transceiver Subsystem) of a mobile communication system is provided to considerably decrease a position information calculation time by not repeatedly performing a position information calculation process whenever initializing the BTS. CONSTITUTION: Position information of a BTS is initially set(S1), and position information of a current BTS is calculated(S2). It is confirmed whether calculated position information is changed to initial position information(S3). If calculated position information is changed to initial position information, a TFU(Time and Frequency Unit) transmits calculated position information to a BCP(BTS Control Processor)(S4). The BCP transmits received position information to store position information in a database of a BSM(Base Station Manager)(S5). The TFU generates a TOD(Time of Day), an 1PPS, and 10MHz clocks as a system clock, an even second clock, and 10MHz clocks and outputs the generated system clock, even second clock, and 10MHz clocks to a DU(Digital Unit) to perform the initialization of the BTS(S6). It is judged whether the TFU requests the input of position information to the BCP(S7). If the TFU requests the input of position information to the BCP, the BCP transmits position information of the BTS stored in the database of the BSM(S8) for performing the initialization of the BTS through a clock generation operation of the TFU so that the BTS performs a normal operation(S8).

Description

Base station initialization method in mobile communication system {METHOD FOR BEGINNING BASE STATION OF MOBILE COMMUNICATION SYSTEM}

The present invention relates to a method of initializing a base station of a mobile communication system, and more particularly, to a method of initializing a base station of a mobile communication system, which can greatly reduce the location information calculation time by not repeating the location information calculation process every time the base station is initialized. will be.

In general, a synchronous mobile communication system using a code division multiple access (CDMA) method performs initialization of a base station using location information by a global positioning system (GPS).

In other words, the base station performs a downloading after powering up to drive the software, and initializes by calculating its location information by connecting to the satellite through a warming-up process in the GPS in the base station. Perform

Only when the position information is correctly calculated, the base station can be initialized and operate normally.

The calculating of the position information is an important task for generating Even Second in a synchronous mobile communication system, and the GPS must be connected to three or more satellites to calculate accurate position information of latitude, longitude, and altitude. In this case, the time required to calculate the location information occupies the most weight when the base station is initialized.

On the other hand, conventionally, although most of the base stations in operation have been fixed, the position information calculation operation was repeatedly performed at each initialization.

Therefore, when repeating the position information calculation operation for the same position as in the prior art, there is a problem in that the call service for the terminal is delayed because it is always present despite the unnecessary time required for the position information calculation operation.

If the satellite reception status is poor depending on the location of the base station, the time required for calculating the location information is greatly different, but the service providing time is inevitably delayed. There is a problem that appears as a delay factor of call service over.

In addition, if the conventional operator inputs the latitude, longitude, and altitude location information specified in the IS-95, if the communication with the GPS in operation is not possible, the range of use is very limited, and if the information is incorrect If the service is reflected in operation, a call service outage may occur.

The present invention has been made to solve the above problems, the object of which is to significantly reduce the location information calculation time by not repeating the location information calculation process every time the base station is initialized, and thus a lot more quickly after the base station initialization The present invention provides a method for initializing a base station of a mobile communication system to provide a service to a terminal user.

1 is a block diagram of a base station for applying an initialization method according to the present invention;

2 is an operation flowchart showing a base station initialization method of a mobile communication system according to the present invention;

<Description of the symbols for the main parts of the drawings>

10: base station 11: GPS

12: TFU 13: RFU

14: BCP 15: DU

20: BSM

The base station initialization method of the mobile communication system of the present invention for achieving the above object comprises the step of initial setting and calculating the position information after the TFU initially initializes the position information of the base station, and calculates the position information of the current base station; The position information change determination step of checking whether the position information calculated in the initial setting and calculating step has been changed with respect to the initially set position information, and if the position information is changed as a result of the determination of the position information change determining step, the TFU is initially set to the position information. And transmitting and storing the location information calculated in the calculating step to the BCP, and storing and storing the location information in the database of the BSM and the location information change determination step. And a base station performing base station initialization through a clock generation operation of the TFU after performing the storing step. After the evaporation step and the base station initialization step, if the TFU requests location information input to the BCP, the BCP transmits the location information stored in the database of the BSM to the TFU to perform the base station initialization through the clock generation operation of the TFU. Characterized in that the input request determination and position information transmission step.

Hereinafter, a method of initializing a base station of a mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a base station for applying the initialization method according to the present invention, the base station 10 is a GPS (11) for receiving information related to the latitude, longitude, altitude position information from the satellite, and the GPS ( 11) calculates the latitude, longitude, and altitude position information by calculating the information related to the latitude, longitude, and altitude position information output from the Latitude, longitude, altitude, and applies the calculated position information to the timing generator to determine the time of day (TOD), Time & Frequency Unit (TFU) 12 generating and outputting 1PPS, 10MHz clock as system clock, even second clock synchronized to 1PPS, 10MHz clock, and Radio Frequency Unit RFU (Radio Frequency Unit) to process RF signal through antenna 13, BTS (BTS Control Processor) 14 for controlling the overall operation of the base station, and processes the digital signal in the base station according to the system clock, even second clock, 10MHz clock output from the TFU 12 Configured to include a digital unit (DU) 15 All.

The base station 10 configured as described above is operated in connection with a control station (not shown) and the BSM 20 through an E1 or T1 link, and a serial communication path between the TFU 12 and the BCP 14. Is provided.

In the case of the BCP 14, conventionally, only the TOD and control information were received from the TFU 12 in units of 2 seconds, but in the present invention, the position information is determined by the TFU 12 by introducing a location information transmission process. The location information is transmitted from the BCP 14 to the TFU 12.

That is, the TFU 12 calculates the location information of latitude, longitude, and altitude after installation of the base station, and stores the calculated location information in the database of the BSM 20 via the BCP 14 and manages it. When it is determined that position information is necessary, the BCP 14 transmits the position information to the TFU 12.

A method of initializing a base station of a mobile communication system according to the present invention made in the base station configured as described above will be described with reference to the flowchart of FIG. 2.

First, after initial setting the position information of the base station in the position information initial setting step (S1), the process proceeds to the position information calculating step (S2) to calculate the position information of the current base station.

That is, the TFU 12 calculates the latitude, longitude, and altitude position information output from the GPS 11 to calculate the latitude, longitude, and altitude position information for the base station.

After the position information calculating step S2, the process proceeds to the position information change determining step S3 and the position information calculated in the position information calculating step S2 is set to the initial position information set in the position information initial setting step S2. Check for changes.

That is, after powering up the base station, the TFU 12 checks whether the position information calculated in the position information calculating step S2 and the initial position information set in the position information initial setting step S2 are different from each other.

As a result of the determination of the position information change determination step S3, if the position information is changed, the process proceeds to the position information transmission step S4, whereby the TFU 12 transfers the position information calculated in the position information calculation step S2 to the serial communication path. Through the transmission to the BCP 14, and then proceeds to the location information storage step (S5) and transmits the location information received by the BCP 14 to the BSM 20 to be stored in the database of the BSM (20).

Here, the BCP 14 stores only the location information of the TFU 12 in the database of the BSM 20 when it is correct.

At this time, the latitude, the alarm information is expressed as follows, the location information is converted into hours, minutes, seconds in the BCP 14 through the following conversion formula and stored in the database of the BSM 20.

Latitude ---- XX ° YY.ZZZ N

Hardness ---- AA ° BB.CCC E

XX ° YY.ZZZ N = (hours * 3600 + minutes * 60 + seconds * 60) * 4

As a result of the determination of the location information change determination step (S3), after the location information has not been changed or after the location information storage step (S5), the base station initialization step (S6) is performed, and the TFU 12 determines the location information of the current base station. Applied to the timing generator, the base station is initialized by generating TOD, 1PPS, and 10MHz clocks as system clocks, even second clocks, and 10MHz clocks and outputting them to the DU 15.

After the base station initialization step (S6), the process proceeds to the location information input request determination step (S7) to determine whether the TFU 12 has requested the location information input to the BCP (14).

As a result of the determination of the location information input request determination step S7, if the TFU 12 requests the location information input to the BCP 14, the process proceeds to the location information transmission step S8, where the BCP 14 determines the BSM 20. By transmitting the location information of the base station stored and managed in the database to the TFU 12 to perform the base station initialization through the clock generation operation of the TFU 12 so that the base station can operate normally.

If the TFU 12 has not requested location information input to the BCP 14, the TFU 12 proceeds to the base station initialization step S6 to perform the following operations in the same manner.

On the other hand, when the operator incorrectly manipulates the base station position information on the BSM 20 and inputs the abnormal position information to the TFU 12, inputs a reset command and initializes it, and then proceeds to the position information transmitting step (S8) to perform the following operation. Do the same.

As described above, the present invention can significantly reduce the location information calculation time by not repeating the location information calculation process every time the base station is initialized, and maximizes the available state of the system by actively processing the base station initialization. As a result, it is possible to extend and provide more services to terminal users more quickly.

Claims (1)

After the TFU initially sets the location information of the base station, the location information initial setting and calculating step of calculating the location information of the current base station; A location information change determination step of checking whether the location information calculated in the location information initial setting and calculating step has been changed with respect to the initially set location information; The location information transmission and storage step of transmitting the location information calculated in the initial setting and calculation step of the location information to the BCP and storing the location information in the BSM's database if the location information has been changed; , A base station initialization step of initializing the base station through a clock generation operation of the TFU after the location information has not been changed or the location information transmission and storage step has been determined; After performing the base station initialization step, if the TFU requests the location information input to the BCP, the BCP sends the location information stored in the database of the BSM to the TFU to determine the location information input request to perform the base station initialization through the clock generation operation of the TFU and A base station initialization method of a mobile communication system, characterized in that the step of transmitting the location information.