KR100254192B1 - A method for processing handoff information in cellular mobile telecommunication system - Google Patents

Abstract

PURPOSE: A method for processing hand-off information in a cellular mobile communication system is provided to include information for a neighbor base station which is to be target base station and is a hand-off source base station in a hand-off data in order to determine a near-by degree and an interference among neighbor base stations in the cells. CONSTITUTION: An identifying region indicating a starting address for the hand-off information of base station and a data region storing the hand-off information in the address specified by the identifying region are formed in a memory(s110). If hand-off event occurs(s120), a base station controller obtains a starting address for hand-off information about a source base station from the data region(s130). If the starting address for the source base station is Null, -1, a new starting offset value for the data region to be added is assigned and stored in the identifying region in the source base station(s140). Hand-off related information is stored in the data stream added in the data region(s170). If the starting address for the source base station is not Null, a list in the data region is read until a data stream in which ID for the source base station and ID for a target base station are agreed with each other is found(s150). If a data stream in which ID for the source base station and ID for a target base station are agreed with each other is not found, a new record for the base station is added(s160).

Description

A METHOD FOR PROCESSING HANDOFF INFORMATION IN CELLULAR MOBILE TELECOMMUNICATION SYSTEM}

The present invention relates to a method of processing handoff information in a cellular mobile communication system such as a code division multiple access (CDMA) cellular and a personal communication service (PCS), and in particular, related information between a plurality of base stations serving a specific area (cell). To provide information that is the basis for efficient operation of the system and cell planning.

The PCS system and the CDMA cellular system include a plurality of base transceiver subsystems (BTSs) providing a service to a mobile station, a base station controller (BSC) controlling a plurality of base stations, and a plurality of base stations. It consists of a Base Station Manager System (BSM) and an exchange station system that operates and manages a controller.

A cell is a minimum unit of a service area in a cellular mobile communication system, and may be divided into several sectors.

In mobile communication systems, systems below the exchange system are commonly referred to as Base Station Subsystem (BSS). The base station subsystem is composed of a base station management system (BSM), a plurality of base station controller (BSC) systems and a plurality of base station (BTS) systems at the top.

The main processor of the base station controller system is called a Call Control Processor (hereinafter referred to as CCP), and the main processor of the base station system is referred to as a BTS Control Processor (hereinafter referred to as BCP). do.

1 is a structural diagram of a conventional base station subsystem (BSS), as shown, with a plurality of base stations (BTSs) 10 to 15; It consists of upper base station controllers (BSCs) 20 to 22 and base station management system (BSM) 30 for operating and maintaining them.

The base station management system 30 generally manages twelve base station controllers, and the base station controller can manage dozens of base stations according to the type of communication system (CDMA cellular or PCS).

The cellular mobile communication system aims to ensure that there are no obstacles in communication when the wireless telephone (ie, mobile station) travels in various areas. Therefore, when the mobile station is in an idle state, it must be regularly re-registered with the system according to various parameters.

When a call is in operation, the mobile station, base station and switching station can communicate between the base station and the mobile station, in particular a mobile station moving from one base station to a new base station or within a new antenna tolerance zone to maintain good radio link efficiency. In other words, it manages handoff, which is a process of moving to a new traffic channel.

There are largely handoff methods and soft handoff.

Soft Handoff is a method of stably establishing call continuity by setting two or more call paths simultaneously for a single call.

Because CDMA can be configured simultaneously with different codes through different frequency bands in the same time zone, the soft handoff method is CDMA-specific handoff that can be composed of multiple calls for one call. Technique.

Since more than one channel can be configured at the same time, the quality of a call can be determined by the best channel among multiple channels, thereby greatly improving the overall call quality and continuity of the call. In addition, there is an advantage that can minimize the strength of the power required in terms of power control (Power Control).

Such soft handoffs include inter-cell soft handoffs and base station control period (Inter-BSC) handoffs. In particular, inter-sector handoffs are called softer handoffs.

Hard handoff is provided when the two base stations to which the mobile station is affected are not synchronized or not at the same frequency, and when interruptions occur in voice or data communications.

In other words, hard handoff is a method of guaranteeing continuity of a call by setting a new channel within a short time that is difficult for a caller to recognize after cutting an existing channel.

Hard handoff may be provided when more than one frequency band (frequency allocation or channel) is used in each cell or two base stations are not synchronized. Another kind of hard handoff is provided when there is no CDMA base station that effectively serves and the mobile station has to be designated as an analog cellular channel.

Hard handoff includes Inter-MSC hard handoff and Inter-FA (Frequency Assignment) handoff and Inter-Frame Offset (Hard Handoff).

The establishment of a channel between the base station and the mobile station through various types of handoffs described above is called ADD, and the removal of the channel through handoff is called drop (DROP).

In the CDMA system, for each of the various handoffs described above, each base station is distinguished by using an identifier (ID) of a source base station (Source BTS) requiring handoff, and accordingly, handoff information is output.

The prior art CDMA system stores only the information on the frequency and success rate of the handoff occurrence from a specific base station to a neighbor base station (Neighbor BTS) as handoff information, and provides the operator with closeness and handoff success rate between each base station. .

Particularly, in the call processing block in which the base station and the base station controller separate and process calls having various service types, the handoff information is included in the statistical data area each time an handoff occurs. Save it so that you can provide the information.

However, the handoff information according to the related art does not include information according to the location and characteristics of the target base station to be handoffed. Therefore, there is a problem in that it is not enough to use as a basis data such as the degree of interference between the areas (cells) serviced by each base station and cell location only by the handoff information according to the prior art.

The present invention to solve the above problems,

For each base station, in order to determine the degree of interference and closeness to a specific neighboring base station between cells, the handoff information data is collected and included in both handoff source base station and neighbor base station which may be a target base station. An object of the present invention is to provide a method for processing handoff information in a cellular mobile communication system.

1 is a structural diagram of a base station sub-system.

2 is an area diagram of a memory required for collecting handoff information by the present invention.

3 is a flowchart showing a handoff information processing method according to the present invention.

4 is a block diagram showing an area for reading data collected by the present invention.

5 is a method diagram showing a handoff information storage area in a base station management system according to the present invention.

6 shows an example of handoff occurrence.

* Explanation of symbols for main parts of the drawings

310: data transmission area 320: data reading area

330: library data storage area 410: base station controller data area

420: identification area of the base station management system 430: data area of the base station management system

The method for processing handoff information of a base station controller of a cellular mobile communication system according to the present invention devised to achieve the above object,

Configuring a handoff storage area divided into a data area and an identification area;

When a handoff occurs from a source base station to a destination base station, obtaining a start offset, which is a start address of a record in the data area, in which the handoff information of the source base station is stored, from the identification area;

As a result of obtaining the start offset, when a record in which the handoff information of the source base station is stored does not exist in the data area, an additional start offset of a new record for the source base station is further allocated, and the additional information is allocated to the identification area. Storing a start offset of the allocated record;

Storing the ID of the source base station, the ID of the target base station, and the handoff information in a record indicated by the additionally allocated start offset;

As a result of obtaining the start offset, when the record in which the handoff information of the source base station is stored exists in the data area, the source base station and the target base station search for the record in which the handoff information of the source base station is stored and the records linked thereto. Retrieving all matching records;

If there is no record in which both the source base station and the target base station match the search result, adding a record to the data area, and storing the ID of the source base station, the ID of the target base station and the handoff information in the added record. ;

Storing an ID of the source base station, an ID of the target base station, and handoff information in the searched record if there is a record in which both the source base station and the target base station match the search result; And

Reporting the stored handoff information to a base station management system.

In addition, the embodiment of the handoff information processing method of the base station management system of the cellular mobile communication system according to the present invention,

Configuring, by the base station management system, a handoff storage area divided into a data area and an identification area;

A plurality of base station controllers collecting handoff information generated at each base station to form a data area including a plurality of records each consisting of an ID of a source base station, an ID of a target base station, and corresponding handoff information;

Each base station controller reading the maximum number of records connected to the base station controller and converting the read records into a form that can be transmitted to the base station management system;

Periodically transmitting the converted records to a base station management system;

When a record in which handoff information is stored is received from a base station controller, obtaining, from the identification area, a start offset which is a start address of a record in the data area in which handoff information of a source base station corresponding to the received record is stored;

As a result of obtaining the start offset, when a record in which the handoff information of the source base station is stored does not exist in the data area, an additional start offset of a new record for the source base station is further allocated, and the additional information is allocated to the identification area. Storing a start offset of the allocated record;

Storing the ID of the source base station, the ID of the target base station, and the handoff information in a record indicated by the additionally allocated start offset;

As a result of obtaining the start offset, when the record in which the handoff information of the source base station is stored exists in the data area, the source base station and the target base station search for the record in which the handoff information of the source base station is stored and the records linked thereto. Retrieving all matching records;

If there is no record in which both the source base station and the target base station match the search result, adding a record to the data area, and storing the ID of the source base station, the ID of the target base station and the handoff information in the added record. ;

Storing an ID of the source base station, an ID of the target base station, and handoff information in the searched record if there is a record in which both the source base station and the target base station match the search result; And

Inspecting the stored records, and combining and storing the duplicated records.

Information about the handoff occurrence from one base station to any other specific base station around is important as handoff information and cell plan related information. Accordingly, the method for processing handoff information according to the present invention provides both information about a handoff, information on a source base station serving as a base station before handoff and a target base station serving as a base station to receive a call through handoff.

When a call is set up at a particular base station in one base station controller, the base station controller on which the call is set up performs all control for that call until the call is released at the set up base station or an exchange duration handoff occurs.

If a handoff is required for the first set up call, the set up base station attempts a handoff to the neighbor base station included in the neighbor base station information list, and handoffs from the handed off base station back to the neighbor base station. May be required.

Therefore, the base station controller for which the first call is set up has all the information about all the handoffs that occur continuously for the call.

According to the present invention, when a handoff occurs for a certain call, in the handoff information of the base station controller where the first call is set up, all the base stations in the base station controller as well as all neighbor base stations are collected and stored. It can be reported to the base station management system for each type of handoff generated for the operator.

In order to collect handoff information data according to the present invention, information of a source-target base station should be provided for each item. Therefore, the present invention configures a storage area for storing information of the source base station and the target base station together for each handoff event.

FIG. 2 illustrates a region diagram of a memory required for collecting handoff information according to the present invention, and FIG. 2 (a) is an index zone for identification indicating a source base station. FIG. 2B is a data area indicating a position where data of the corresponding base station exists in the entire memory.

Position 1 of the identification region shown in (a) of FIG. 2 indicates base station 1, and a value 30 stored in the position of base station 1 is derived from an address corresponding to the data array 30 of the memory area, starting from base station 1. It means that handoff information is present.

In FIG. 2B, the identification 1 field indicates an ID of a source base station requesting handoff, and the identification 2 field indicates an ID of a target base station targeted for handoff. Therefore, arrangement 30 shown in (b) of FIG. 2 is a start arrangement of information on handoff that may occur based on base station 1.

The next pointer field, which is the last part of the data storage area of FIG. 2 (b), is used to designate the next data array of the corresponding base station, and is a value stored in the next pointer field of the data array 30. 35 means that the next handoff information originating from the base station 1 is stored in the data array 35 of the data area.

If a handoff request originating from base station 1 occurs, the system searches for data array 30. If the target base station (base station 12) stored in the searched array matches the currently requested target base station, 1 is added to the information on the number of handoff occurrences previously stored in the data field of the data array 30, and then the information according to the result of performing the handoff. Write

If the destination base station does not match base station 12, then the array pointed to by the next pointer of data array 30 is searched, that is, the destination base station field of data array 35.

The next pointer field of the neator array 35 has a value of -1 to indicate that it is the last handoff information for the corresponding base station because there is no information to follow. That is, the handoff information originating in base station 1 no longer exists in the data area.

As shown, when the target base station does not match the base station 23 stored in the data array 35, since the handoff information based on the base station 1 no longer exists, the handoff information based on the base station 1 is stored. You must add a new record.

Hereinafter, the operation and effect of the present invention will be described with reference to FIG. 3, which shows a flowchart of the handoff information processing method according to the present invention.

The base station controller according to the present invention forms an identification area and a data area in the memory configured as shown in FIG. 2 to store the corresponding handoff information. (S110) The identification area corresponds to the source base station according to an index indicating the source base station. Indicates an address from which handoff information starts, and the data area stores handoff information of each base station at an address designated by the identification area.

When the handoff event occurs (s120), the base station controller obtains a start address of the handoff information of the corresponding base station in the data area by using the identifier ID of the source base station stored in the identification area as a key value. In this case, when the start address value obtained from the identification area is null, that is, -1, the currently generated handoff is determined as the first data for the source base station.

In this case, since the location where the information on the currently generated handoff is stored becomes the start of the storage list of the corresponding source base station, the start offset value of the newly added data area is allocated to the identification area representing the source base station and stored. (s140) The generated handoff related information is stored in the corresponding data array newly added to the data area.

That is, the next pointer of the final list stored in the data area is the start offset of the first record corresponding to the source base station. Therefore, starting from the obtained start offset, handoff information for the base station is stored.

In step S130, if a specific value other than -1, i.e., null, exists in the identification area of the corresponding source base station, it is determined that a data array having the same source base station identifier already exists in the data area.

Each of the records in the data area consists of a linked list with the next pointer, so that the list of data areas continues to be read, and the source base station ID and the destination base station ID coincide with each array's identifier field information. Find the data array, that is, the record (s150).

If there is a data array in which the source base station ID and the target base station ID coincide with each other, there is no need to add a new record, and the generation amount is increased once for each occurrence of the generated handoff in the data array (s170).

If there is no record matching the destination base station ID even though the list is retrieved, since the first data for the source base station-target base station pair is added, a separate new record is added for the corresponding source base station (s160), and the added record The generated handoff related information is stored in the.

In the above structure, if a handoff occurs once from each base station to the first main base station, the information size of the data array required for storing the handoff information for one base station is expressed by Equation 1 below.

[Equation 1]

Where S = handoff statistics information structure, i.e., the size of the data array.

However, in practice, the handoff request may occur in large quantities according to all neighboring base stations affected by the mobile station, and each mobile station includes several base stations in its own handoff candidate set. It also increases.

After all, due to the mobility of the mobile station it can be seen that the amount of handoff information is dynamically converted according to the base station situation. In view of this, the size of data for handoff information for one base station is expressed by Equation 2 below.

[Equation 2]

In Equation 2, M is the maximum number of neighbor base stations for one base station, the other peripheral handoff is the number of cases to hand off to another base station until the call is released, S is a hand from one base station to another base station Off information amount.

If the data storage area is determined with the maximum data array size obtained as described above and the handoff information is processed, the data can be easily and quickly collected and processed. That is, the size of the maximum data area is " maximum number of base stations in one switching station " x " size per one handoff information record ".

For example, assuming a maximum data size of approximately 40 bytes, a CDMA system with 12 base station controllers and one base station controller handling up to 16 base stations eventually results in 192 × 40 (16 × 12 × 40 per base station controller). ), Which has 12 base station controllers and one base station controller processes up to 48 base stations, requires 576 × 40 (48 × 12 × 40) bytes of information per one base station controller.

In fact, since the maximum number of base stations included in one base station management system is 192 (12 base station controller x 16 base stations), when the source base station is determined, the target base station can be up to 191.

However, since the number of data arrays to be sequentially found in the data storage area does not exceed about 20 by the next pointer value specified in the next pointer field of the data array corresponding to the source base station, it is not very useful to obtain the identifier of the desired data array. It does not take time.

Therefore, the amount of memory required to store the handoff information is reduced by limiting the area in which one handoff information can be stored as described above, so as not to allocate the handoff occurrence data area that is not actually generated.

The transfer of collected data, as well as the amount of memory required to store handoff information, is very demanding on the system. Therefore, in order to effectively manage the handoff information, there is a need for a method for effectively transmitting the handoff information collected and stored in each base station controller to the base station management system.

In the CDMA system, if one packet size of data transmitted from any base station controller to the base station management system controls the control head portion and is approximately 200 bytes, 192 for handoff information transmitted from each base station controller to the base station management system 40/200 = 38 packets will be generated. In addition, data of the same size is transmitted from another base station controller.

Since the base station management system manages 12 base station controllers, data of 456 packets (38 packets x 12 base station controllers) are eventually transmitted to the base station management system.

However, since all handoff requests are not generated for all data storage areas, the base station management system requires processing of unnecessary data on data collection and transmission. Therefore, fast information processing, which is the advantage of data collection, can eventually put a heavy load on the system.

Therefore, the present invention reduces the load of the base station management system by dividing the entire data area by handoff scheme to process data collection.

When handoff information is classified according to various handoff methods, it is as follows.

(1) An intersector softener handoff occurs from the first sector of the first base station to the second sector.

(2) Soft handoff between base station controllers occurs from the first base station of the first base station controller to the second base station of the second base station controller.

Soft handoff in the base station controller occurs from the first base station of the first base station controller to the second base station of the base station controller.

A hard handoff in the base station controller occurs from the first base station of the first base station controller to the second base station.

5) Hard handoff between base station controllers occurs from the first base station of the first base station controller to the second base station of the second base station controller.

(6) A handoff between switching stations occurs from the first base station of the first switching station to the second base station of the second switching station.

When the base station management system reads a library that stores data collected from each base station controller, the base station management system reads data in all units in order without reading data in all areas. This reduces the load on the system by eliminating the need to read every part of the dynamically growing data storage area.

In order to transmit and report the collected and stored data to the base station management system, the transport block of the base station controller reads the collected data into the library area.

4 is a block diagram showing an area for reading collected data, as shown, a data transmission area 310 for temporarily storing handoff information to be transmitted from a base station controller to a base station management system; A portion 320 for reading data from the library and a library data storage area 330 for storing handoff information corresponding to each base station.

Data collected at each base station controller is stored in the library data storage area 330. The data 320 for reading data sequentially reads a predetermined number (N) of arrays from the library data storage area 330.

Since the library data storage area 330 shown in FIG. 4 is divided into four parts, the data reading part 320 repeatedly reads the data array from the storage area four times in sequence of N pieces, and the data transmission area 310. Tell.

In reality, since the data collection amount is variable, the efficiency of handoff information processing can be grasped according to the amount N of data read at one time. If the amount of data read at a time is large, the size of the memory is increased, and if it is small, the library data storage area 330 must be read too often.

Therefore, if the amount (N) of data read at a time is the number of data arrays corresponding to the maximum number of base stations, data read from the storage area is dynamically collected in the data transmission area 310 in order.

If the period of reading data from the storage area of the base station controller system to the base station management system is too frequent, the load of the system increases accordingly, and if the period is too long, the amount of data stored increases. Therefore, since a lot of data collection time is required, a proper period is set to periodically read the data and repeatedly read the defined number of repetitions.

In the method for processing handoff information according to the present invention, the number of arrays included in each portion of the data transmission area 310 is defined and processed as the maximum number of base stations connected to one base station controller. When the library data storage area 330 is read as many times as the maximum number of repetitions, the library data storage area 330 is cleared.

Therefore, accurate data collection with a fixed data array size is possible without overlapping with the occurrence of a handoff request in the next period.

In this manner, when the information is collected in the base station controller, the collected data is reported to the base station management system. At this time, since all base station controllers also carry information of base stations belonging to the base station controllers, data duplication occurs in the base station management system.

That is, when the call set up at base station 0 is handed off to base station 2 via base station 1 and when the call set up at base station 1 is handed off to base station 2, the source base station (base station 1) and the target base station (base station 2) Since they match, the actual data is the same.

In this case, since both base stations having the call set up, that is, base station 0 and base station 1, have duplicate data in the base station management system.

Therefore, in the base station management system, if a data area exists independently for each base station controller, the output base station and the target base station among the data are displayed together in the output.

Thus, handoff related data is to be shared between the base station management system, the base station controller system and the base station system.

FIG. 5 schematically shows a handoff information storage area in a base station management system. As shown in FIG. 5, a data area 410 of a base station controller which stores handoff information for base stations belonging to N base station controllers; An identification area 420 of the base station management system and a data area 430 of the base station management system according to the identification area.

In the identification area 420 of the base station management system, in storing the handoff information transmitted from the data area 410 of the base station controller, the data area 430 of the base station management system adds up data corresponding to the source base station and the target base station. Will be saved as

Accordingly, the information of the base station 1 that is being served by the base station controller 1, stored in the identification area 420 of the base station management system, is set up at a different base station from the information about the call set up at the base station 1 of the base station controller 1 It combines the information about the call handed off to base station 1.

For example, as shown in FIG. 5, in the data arrangement in which the record ID R _i of the data area 430 of the base station management system is 5, the source base station is base station 1 of base station controller 1 and the specific base station is the target base station. Has handoff information. The other handoff information that originates from base station 1 of base station controller 1 is also contained in data array 12 indicated by the next pointer field.

As in the base station controller, the data area 430 of the base station management system may add a new data array, that is, a record, whenever a handoff request with -1 in the identification area 420 occurs.

The data structures 420 and 430 in the base station management system are similar to those of the base station controller. In the base station controller, the size of each array is fixed and assigned to the maximum estimate. However, since the base station management system uses a file system, the size of the array can be added dynamically without having to initially allocate the size.

The result file finally outputted from the base station management system indicates the required frequency of handoff occurrences regardless of call generation control.

6 shows an example of a handoff occurrence, as shown, base station 1 of base station controller 0 performs a handoff to base station 3 of base station controller 1 through a base station control period soft handoff, and handoff in the base station controller After handoff to base station 4 of the same base station controller 1 through, and finally handoff the base station controller 3 to base station 2 through the base station control period handoff.

If such a handoff request occurs, the actual call is set up at base station 1 of base station controller 0, but moves through the handoff to use resources from other base stations.

The handoff information according to the present invention is designed to accurately represent the occurrence situation of the source-destination base station in the handoff information, which is a statistic indicating the degree of association between each base station.

Therefore, as a result of the handoff request as shown in Figure 6, the base station management system according to the present invention will output the results shown in Table 1 and Table 2.

TABLE 1

TABLE 2

Table 1 above shows that a call set up at base station 1 in base station controller 0 succeeded in setting up a channel by attempting a handoff to base station 3 of base station controller 1 once. Base station 1 of base station controller 0 still served the call, so no drop occurred.

In addition, the success rate of handoff from base station 1 of base station controller 0 to base station 3 of base station controller 1 is 100%, and the traffic channel, code channel, frame offset, and system failure part indicate the cause of the case where the handoff fails. .

The call was set up at base station 1 of base station controller 0, but the subsequent handoff information shares information of base station 3 of base station controller 1 as the target base station.

Table 2 above indicates that base station 3 of base station controller 1 succeeded (ad) by making one handoff to base station 4 of base station controller 1, and base station 4 of base station controller 1 handed off to base station 2 of base station controller 3 Means that you have tried it once and have succeeded.

Through the above-described process, the operator obtains handoff information expressing the degree of interference relatedness between each base station due to the mobility of the mobile station, and is based on the basic data of cell planning such as base station positioning and the basis for determining the increase and decrease of the cell. It can be used, and the information of the resource usage of each base station can also be obtained.

That is, if a large amount of handoff data is generated between specific base stations, the resource requirement amount of the corresponding base station is calculated. If the calculated resource needs of the counterpart base station are near the actual resource amount, a new resource, that is, frequency allocation is needed.

If little handoff occurs at that base station and call drop occurs frequently, this is a problem with the positioning of the base station. At this time, it is determined whether the information of the base station is operating properly, and if such a phenomenon occurs even if it is operating properly, after changing the location of the base station and verifying the location of the base station again.

Referring to the effects of the present invention operating as described above are as follows.

The present invention provides a method of collecting and outputting the information of the source and destination neighboring base stations in the handoff information data, thereby identifying the degree of interference and closeness to a specific neighboring base station between each base station cell, and providing a service for each base station. It is used as the basis for cell planning such as interference information between regions (cells) and base station location selection.

Accordingly, the present invention optimizes cell placement within the entire service area of a cellular system, thereby reducing the incidence of handoff between cells, thereby providing the best call quality to the mobile station.

Claims (12)

A method of processing handoff information in a base station controller, the base station controller managing a plurality of base stations providing mobile communication services to a mobile station and having a handoff storage area for storing handoff information of each base station. Configuring a handoff storage area divided into a data area and an identification area; When a handoff occurs from a source base station to a destination base station, obtaining a start offset, which is a start address of a record in the data area, in which the handoff information of the source base station is stored, from the identification area; As a result of obtaining the start offset, when a record in which the handoff information of the source base station is stored does not exist in the data area, an additional start offset of a new record for the source base station is further allocated, and the additional information is allocated to the identification area. Storing the start offset of the allocated record; Storing the ID of the source base station, the ID of the target base station, and the handoff information in a record indicated by the additionally allocated start offset; As a result of obtaining the start offset, when the record in which the handoff information of the source base station is stored exists in the data area, the source base station and the target base station search for the record in which the handoff information of the source base station is stored and the records linked thereto. Retrieving all matching records; If there is no record in which both the source base station and the target base station match the search result, adding a record to the data area, and storing the ID of the source base station, the ID of the target base station and the handoff information in the added record. ; Storing an ID of the source base station, the target base station ID, and the handoff information in the searched record if there is a record in which both the source base station and the target base station match the search result; And And reporting the stored handoff information to a base station management system. The method of claim 1, wherein the handoff storage area, A first identification field storing the ID of the handoff source base station, a second identification field storing the ID of the handoff destination base station, a data field storing the handoff information, and a next pointer field indicating the start offset of the next record. A data area having a plurality of records; And an identification area for storing a start offset of a record in a data area in which the handoff information of each source base station is stored, with the ID of the source base station as a key. The handoff information of claim 1 or 2, wherein the handoff information is stored in a data field of the data area. In the cellular mobile communication system, characterized in that the number of handoff attempts generated from the corresponding source base station to the target base station, the number of handoff success, handoff failure, handoff success rate and the number of handoff failure according to each cause Method for processing handoff information. The method of claim 3, wherein the next pointer field, A handoff information processing method in a cellular mobile communication system, characterized in that a handoff information generated from a corresponding source base station to another target base station stores a start offset value or -1 of a record. The method of claim 3, wherein the size of the record, M is the maximum number of neighbor base stations of a particular base station, Other Peripheral Handoffs are the number of cases when you handoff to another base station until the call is released. When S is the amount of handoff information from one base station to another, the size of the record is

Handoff information processing method in a cellular mobile communication system. The method of claim 1, wherein the reporting step comprises: And transmitting the records stored in the data storage area to the base station management system repeatedly reading the records stored in the data storage area by the maximum number of base stations at regular intervals. A method of processing handoff information in a base station management system for managing handoff information collected by a plurality of base station controllers managing a plurality of base stations providing mobile communication services to a mobile station, Configuring, by the base station management system, a handoff storage area divided into a data area and an identification area; A plurality of base station controllers collecting handoff information generated at each base station to form a data area including a plurality of records each consisting of an ID of a source base station, an ID of a target base station, and corresponding handoff information; Each base station controller reading a record by the maximum number of base stations connected to the base station controller, and converting the read records into a form that can be transmitted to the base station management system; Periodically transmitting the converted records to a base station management system; When a record in which handoff information is stored is received from a base station controller, obtaining, from the identification area, a start offset that is a start address of a record in the data area in which handoff information of the source base station corresponding to the received record is stored; As a result of obtaining the start offset, when a record in which the handoff information of the source base station is stored does not exist in the data area, an additional start offset of a new record for the source base station is further allocated, and the additional information is allocated to the identification area. Storing a start offset of the allocated record; Storing the ID of the source base station, the ID of the target base station, and the handoff information in a record indicated by the additionally allocated start offset; As a result of obtaining the start offset, when the record in which the handoff information of the source base station is stored exists in the data area, the source base station and the target base station search for the record in which the handoff information of the source base station is stored and the records linked thereto. Retrieving all matching records; If there is no record in which both the source base station and the target base station match the search result, adding a record to the data area, and storing the ID of the source base station, the ID of the target base station and the handoff information in the added record. ; Storing an ID of the source base station, an ID of the target base station, and handoff information in the searched record if there is a record in which both the source base station and the target base station match the search result; And And inspecting the stored records, integrating and storing the duplicated records. 8. The method of claim 7, wherein the step of combining and storing the duplicate records, And among the records received from each of the plurality of base station controllers, the source base station and the target base station combine and store matching records. The method of claim 8, wherein the record stored in the base station management system, Of the source field storing the ID of the source base station where the handoff has occurred, the destination field storing the ID of the destination base station, all handoff information generated from the source base station to the destination base station, and the start address of the next record, i.e., the start offset. And a next pointer indicating a value. 10. The method of claim 7 or 9, wherein the next pointer is And a -1 value of a start offset of another record in which the handoff information generated from the source base station to the other target base station is stored, or -1. The method of claim 10, wherein the record in the base station management system, A method for processing handoff information in a cellular mobile communication system, which is added dynamically as needed. The method of claim 10, wherein the identification area, A hand in a cellular mobile communication system, characterized in that it stores a start address, i.e., a start offset, in a data area in which an identification code of a source base station where a handoff has occurred and a record of handoff information of the source base station is stored. Off information processing method.

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