KR100289643B1 - Cell Management Method in Mobile Communication System - Google Patents

Abstract

The method of managing a cell in a mobile communication system is a command from the BSM to a base station through a control station to transmit or reduce a cell and data, and the base station finds and changes all necessary PLD parameters and data. If the result of the base station succeeds, all the corresponding PLDs are changed and the result is transmitted to the BSM. If the result of the control station is successful, the BSM changes the PLD, and the BSM controls other than the control station to which the base station belongs. Notifies the station that the cell has been expanded or reduced, and if the PLD change is successful according to the cell increase / decrease, it transmits a response to the control station to which the base station belongs, the control station informs the base station of the response, and the base station transmits to the cell increase / decrease. According to the successful PLD change, by activating or deactivating hardware consistent with the changed PLD, and notifying the mobile station of the result, the base station Services that will allow the cells can be expanded or gamseol without interruption.

Description

Cell Management Method in Mobile Communication System

The present invention relates to cell management of a mobile communication system, and more particularly, to extend or reduce a cell without interrupting service of a base station, and to improve call quality by using a virtual loop-back cell for each sub-cell of an increased / decreased cell. The present invention relates to a cell management method of a mobile communication system for checking and notifying an operator thereof.

In general, a mobile communication system is a system that allows a mobile station (mobile terminal) to move while receiving a communication service.

1 is a block diagram showing such a general mobile communication system.

As shown here, an exchange station 1 which transmits a call processing request of the mobile station 5 to another communication network such as a public switched telephone network through a public network or a dedicated network so that a mobile communication service can be made; A base station management (BSM) 2 which controls the control station 3 and the base station 4 as a whole; A control station (3) under the control of the BSM (2) and for transmitting / receiving messages with the switching center (1); A base station (4) which transmits a call transfer request of the control station (3) to the mobile station (5) and receives a call processing request of the mobile station (5); It consists of a mobile station 5 which is operated while moving or stops at a point which is not specified, and receives mobile communication service in the coverage area of the base station 4.

In the general mobile communication system configured as described above, when the subscriber intends to use the mobile communication service while having the mobile station 5 within the coverage area of the base station 4, the control station 3 controls the base station 4 to determine. The subscriber's mobile station 5 information (ESN, Electronic Serial Number, terminal unique number) is transmitted to the switching center 1. Therefore, in the mobile communication system, the mobile communication system operates to perform the voice information service or to connect with another communication network according to the request of the mobile station 5 to perform the mobile communication service. And the operator performs the control and maintenance function of the control station 3 via the BSM (2).

Here, in a mobile communication system such as PCS (Personal Communication System) Code Division Multiple Access (CDMA), there is a need to increase cells in a base station as the terrain of a specific region changes during system operation.

Thus, the cell management method according to the cell expansion of the conventional base station is as follows.

First, in order to expand a cell at the base station 4, the base station 4 currently in use is down and the call service is stopped. In addition, hardware installation is performed according to cell extension using the necessary hardware method, and cell management is performed according to cell extension by deleting / adding the base station 4 currently used or changing the shape of the entire system.

However, the current subscribers have a problem in that the call service is interrupted as long as the system configuration is changed to receive the mobile communication service.

In addition, since the configuration of the system needs to be changed, parameters and parameters of the base stations must be reset, and if a mistake of the operator occurs in this process, there is a problem in that a long time should be input to tune the output of the base station.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to extend or reduce a cell without interrupting service of a base station, and virtual loop-back for each sub-cell of an expanded / reduced cell. Mobile communication that checks the call quality using the cell and informs the operator, and transmits the increased / decreased cell to the mobile station in the base station, so that the subscriber can receive the service of the added or deleted cell without interruption of service. It is to provide a cell management method of the system.

Cell management method of a mobile communication system according to the present invention in order to achieve the above object,

After the operator transmits a command and data to the base station to increase or decrease the cell through the control station from the BSM and waits for a response, the base station receives the command, finds the necessary PLD parameters and data, changes all of them, and recalls the change result. And transmits the result of the change to the BSM if the result of the base station succeeds, and transmits the result of the change to the BSM, and if the result of the control station is successful, the BSM changes the PLD. The BSM notifies the control station other than the control station to which the base station belongs to notify that the cell has been expanded or reduced, and if the PLD change is successful according to the increase / decrease of the cell, and transmits a response to the control station to which the base station belongs, The control station informs the base station of the response, and the base station, if the PLD change according to cell increase / decrease succeeds, the changed PLD; Correspondingly, the technical configuration features for activating or deactivating hardware and informing the mobile station of the result.

1 is a block diagram of a general mobile communication system.

2 is a flowchart illustrating a cell management method of a mobile communication system according to the present invention.

3 is a flowchart illustrating a cell management method of a base station in FIG. 2.

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

10: BSM 20: control station

30: base station

Hereinafter, with reference to the accompanying drawings, an embodiment according to the technical concept of the cell management method of the present invention as described above in detail as follows.

First, in the present invention, when a cell (or sector) in a base station is expanded or reduced as the topography of a specific region is changed during system operation in a mobile communication system, the base station is down and the necessary hardware processing is performed to change the shape information of the base station. Then, by improving the conventional method of reviving the system, the cell is expanded or reduced without interrupting the service of the base station, and the call quality is checked using a virtual loopback call for each sub-cell of the increased / decreased cell.

2 is a flowchart illustrating a cell management method of a mobile communication system according to the present invention.

Here, the BSM 10 stores processor load data (PLD) including various executable files of the control station 20 and the base station 30 and downloads them when the control station 20 requests loading. The control station 20 stores a file and a PLD executed in the base station 30 that has been loaded, and downloads the file when a loading request is made by the base station 30. Then, the base station 30 reads the contents of the PLD and activates hardware related to the corresponding cell to perform call service.

As shown in FIG. 2, in the cell management method of the mobile communication system, an operator transmits a command and data for increasing or decreasing a cell from the BSM 10 to the base station 30 through the control station 20 by the operator. Waiting for a post response (ST1) (ST2); After receiving the command, the base station 30 finds the necessary PLD parameters and data, changes all of them, and transmits the changed result to the control station 20. The control station 20 performs a result of the base station 30 performing the change. If successful, change the corresponding PLD and transmit the result to the BSM 10. If the result of the control station 20 is successful, the BSM 10 changes the PLD (ST3) (ST4). Wow; The BSM 10 notifies the control station 20 other than the control station 20 to which the base station 30 belongs, that the cell has been expanded or reduced, and if the PLD change according to the cell increase / decrease is successful, the corresponding base station ( Transmitting a response to the control station 20 to which the 30 belongs, and the control station 20 notifying the base station 30 of the response (ST5); When the PLD change according to cell increase / decrease is successful, the base station 30 activates or deactivates the hardware in accordance with the changed PLD, and informs the mobile station of the result (ST7) (ST8).

The hardware method for changing the shape of the system is the same as the conventional method. However, in the related art, cell management is performed according to cell addition or reduction of a base station while the system is down. The present invention performs cell management according to cell extension or reduction of a base station while the system is operating normally. Here, how to change the shape information used in the base station 30 and check the call quality by checking the added devices is an important issue.

Thus, the operator gives a command and data to expand or reduce the cell to the control station 20 by using the BSM (10) consisting of the workstation (ST1). The control station 20 receives the command and data to the base station 30, and waits for a response from the base station 30 (ST2).

After receiving the command, the base station 30 finds the required PLD parameter and data, changes all of them, and transmits the result to the control station 20 (ST3). Only when the result is successful, the control station 20 also changes all the corresponding PLDs, and then transmits the result to the BSM 10 (ST4). The BSM 10 likewise changes the PLD only when the result of the control station 20 is successful.

In addition, the BSM 10 notifies the control station 20 other than the control station 20 to which the base station 30 belongs, and informs that the cell has been expanded or reduced, and receives a response. If the BSM 10 succeeds in changing the PLD according to cell addition or reduction, the BSM 10 transmits a response to the control station 20 to which the corresponding base station 30 belongs (ST5). The control station 20 then transmits the activation / deactivation of the call resource and the cell increase / decrease request to the base station 30 (ST6). Only when all of the above processes are successful, the base station 30 activates or deactivates the hardware according to the changed PLD and informs the mobile station of this (ST7) (ST8).

3 is a flowchart illustrating a cell management method of the base station 30 in FIG. 2, which illustrates a case of cell expansion.

As shown in FIG. 2, when receiving the cell extension command from the control station 20, the PLD associated with the cell extension is changed and stored in the database of the internal memory, and the change completion message is transmitted to the control station 20. Waiting for the BSM (10) and the control station (20) to succeed in changing the PLD (ST11-ST14); If the PLD change of the BSM 10 and the control station 20 is successful, the database stored in the internal memory of the base station 30 is changed, and the expanded hardware is initialized and activated to activate or activate the hardware. Determining (ST15-ST17); If the activation and state of the hardware is normal, it informs the internal process of the base station 30 related to cell expansion that the cell has been expanded, allocates an overhead channel associated with the expanded cell, and establishes a virtual call for call processing service. Loop-backing each sub-cell of the cell to be checked and reporting the call quality to the BSM 10, and transmitting cell extension information to the mobile station to perform a call service (ST18 to ST21); If the activation and state of the hardware are not normal, a step ST22 of reporting to the BSM 10 that a problem has occurred in the enlarged device is performed.

When the base station 30 receives a command from the control station 20, the base station 30 modifies the PLD by changing necessary parameters and data using the library used to partially change the PLD. The modified PLD is loaded at an arbitrary position in the internal memory of the base station 30 (ST11) (ST12).

The changed PLD is transmitted from the BSM 10 to the Call Control Processor (CCP) processor, and the CCP restarts the corresponding base station 30 to change necessary information. A cell may have several Frequencies (Frequency Allocations) currently in use, that is, several sub-cells. In addition, unlike a sub-cell, a cell must have information of a cell which is also added not only to the control station 20 to which the base station 30 belongs, but also to other control stations 20. In the PLD, a lot of information about a cell is required such as pn_offset and addition of a cell, paging of a sub-cell of a cell used in the same base station 30, pilot sink, access channel element, and the like. Thus, when the cell is expanded or reduced, the control station 20 receives only necessary information from the BSM 10 as data and transmits the data to the corresponding base station 30.

Thus, if the PLD of the base station 30 is changed without abnormality, a change completion message is transmitted to the control station 20, and waits until a signal is received that the PLDs of the BSM 10 and the control station 20 have been changed (ST13). (ST14).

The base station 30, which has received the necessary information and data, modifies its PLD, which is necessary for adding or reducing cells. Therefore, only when the change is successful, the database loaded in the internal memory is changed, and the change completion message is transmitted to the BSM 10 (ST15). In addition, it transmits the parameters and data required to initialize the hardware, such as the installed baseband interface card assembly (BICA), high power amplifier (HPA), antenna, and front-end, to check the added devices. Send to the state processor. In addition, information on the shape change is notified to other processors, that is, a call processing processor, a resource management processor, a statistics collecting processor, a loading processor, and a diagnostic processor (ST16).

In this way, the system is checked to determine whether the hardware activation and status are normal (ST17).

If there is no abnormality as a result of the system check, the internal processor related to cell expansion or reduction is notified that the cell has been expanded or reduced (ST18). An overhead channel related to cell addition or reduction is allocated (ST19), and a virtual call for call processing service is looped back for each sub-cell of a new cell and analyzed. Therefore, the call quality of each sub-cell is checked and the result is notified to the BSM 10 (ST20).

If an abnormality occurs as a result of the system check, it transmits to the BSM 10 that a problem has occurred in the additionally installed device and excludes it from service (ST22).

Accordingly, the cell can be expanded or reduced without interrupting the service of the base station 30 currently in operation. If all the hardware related to the call resource is normally operated, the mobile station is informed of cell addition or reduction (ST21). Then, normal call service is performed with the expanded or reduced hardware, and cell coverage is increased or decreased.

As such, the present invention is to expand or reduce the cell without interrupting the service of the base station.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, in the cell management method of the mobile communication system according to the present invention, when the cell is expanded or reduced during the operation of the base station, it can be performed without interruption of service of the system, and a series of necessary checks such as expansion or reduction are performed. Measures are taken to improve the reliability of system operation.

In addition, it is possible to improve the stability of the system and increase the public awareness of the system by minimizing the service interruption by performing this without expanding the operation of the system when the cell is expanded or reduced.

Claims (2)

In the cell management method of a mobile communication system, Transmitting, by the operator, a command and data for expanding or reducing a cell from a base station management (BSM) to a base station through a control station, and waiting for a response; After receiving the command, the base station searches for the required PLD (Processor Load Data) parameters and data, changes all of them, and transmits the changed result to the control station. The control station transmits all the corresponding PLDs if the execution result of the base station is successful. Sending a result to the BSM after making a change, wherein the BSM changes the PLD if the result of the control station is successful; The BSM notifies the control station other than the control station to which the base station belongs to notify that the cell has been expanded or reduced, and if the PLD change is successful according to the increase / decrease of the cell, the BSM transmits a response to the control station to which the base station belongs, The control station informing the base station of the response; And when the PLD change is successful due to cell increase / decrease, activating or deactivating hardware in accordance with the changed PLD, and notifying the mobile station of the result. The method of claim 1, wherein the cell management step in the base station, When receiving the cell expansion command from the control station, the PLD associated with the cell expansion is changed and stored in the database of the internal memory, the change completion message is transmitted to the control station, and the BSM and the control station succeed in changing the PLD. Waiting until; If the PLD change of the BSM and the control station is successful, changing the database stored in the internal memory of the base station and initializing and activating the expanded hardware to determine whether the hardware activation and status are normal; If the activation and state of the hardware is normal, the internal process of the base station involved in cell expansion informs that the cell has been expanded, allocates an overhead channel related to the expanded cell, and establishes a virtual call for a call processing service. Loop-backing each sub-cell to check call quality, report the result to the BSM, and send cell extension information to the mobile station to perform a call service; And if the hardware activation and status are not normal, transmitting the problem to the BSM that the problem has occurred in the enlarged device.