JP5141267B2 - Cellular mobile radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable each base station to autonomously generate office data for neighboring cell information. <P>SOLUTION: In a method of autonomously generating neighboring cell information in a cellular mobile radio communication system includes steps for: transmitting, by a first base station, a measurement radio signal through a radio channel for radio field intensity measurement; measuring the radio field intensity of the measurement radio signal received from the first base station; determining based on the measured radio field intensity whether the first base station is a neighboring cell; registering the identification information of the first base station in second office data of neighboring cells possessed by the base station itself when the first base station is determined as the neighboring cell; obtaining first office data possessed by the first base station based on the identification information; and reflecting the first office data obtained from the first base station as neighboring cell information in the second office data possessed by the base station itself. The method sequentially repeats these steps. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a cellular mobile radio communication system, and more particularly to an autonomous generation method of neighboring cell information in the cellular mobile radio communication system.

  Conventionally, in cellular mobile radio communication systems, station data held for each base station has been created for each base station by a system operator (maintenance person), which is very time-consuming.

  The neighboring cell information in the station data defines the neighboring cell of each base station, and determines the destination cell candidate for the next mobile terminal belonging to the base station to be handed over. is there. The neighboring cells need to be adjacent not only geographically adjacent to each other but also in a radio wave environment that can be a diversity environment.

  Considering the necessity of handover, neighboring cell information as station data is indispensable in a base station of a mobile radio communication system that supports mobility of a mobile terminal. The neighboring cell information includes specific information for each base station such as base station ID (identification information), latitude / longitude information, and base station capability information (for example, whether or not there is a HSDPA (High Speed Downlink Packet Access) function).

  Of course, when building a system, it is necessary to create station data for each base station, but when adding a new base station to a place where an area (service area) has already been deployed, the station of the added base station Not only the data but also the station data of the neighboring base stations must be corrected.

  Furthermore, in urban areas (urban areas), it is necessary to change station data even when the radio wave environment changes due to construction or dismantling of buildings around the base station.

Therefore, a technique for autonomously creating and updating station data related to neighboring cell information triggered by an external trigger is required.
JP 2005-27189 A JP-A-10-191442 Japanese Patent Laid-Open No. 9-23474

  The problem is to provide a technique that enables a base station to autonomously generate station data related to neighboring cell information of each base station with minimal human manipulation.

  Another issue is that station data related to neighboring cell information provided for each base station is replaced with that for each base station by maintenance work of the system operator at the time of system deployment or base station expansion. Then, it is providing the technique which enables a base station to create and manage autonomously.

  Another issue is that when the radio wave environment around the base station changes, the base station changes autonomously in response to changes in the radio wave environment, instead of changing the station data through maintenance work by the system operator. It is to provide technology that makes it possible.

In order to solve the above problem, an autonomous generation method of neighboring cell information is
Cellular mobile radio communication comprising a plurality of base station apparatuses each constituting a cell corresponding to a service area for providing a mobile communication service to a mobile terminal, and at least one base station control apparatus subordinate to these base station apparatuses A method for autonomously generating neighboring cell information in a system;
The first base station apparatus
Transmitting a measurement radio signal through a radio channel for measuring radio field strength;
Each of the other second base station devices sequentially
Measuring the radio field intensity of the measurement radio signal received from the first base station apparatus;
Determining whether the first base station apparatus is a neighboring cell according to the measured radio field intensity;
If it is determined that the first base station apparatus is a neighboring cell, identification information of the first base station apparatus is registered in the second station data of the neighboring cell owned by the first base station apparatus;
Obtaining first station data held by the first base station device based on the identification information;
The first station data acquired from the first base station apparatus is reflected as the neighboring cell information in the second station data held by itself.

  In the configuration described above, the radio channel for measuring the radio field intensity is determined in advance according to a radio transmission method. Each of the second base station apparatuses recognizes the first base station apparatus based on the identification information included in the measurement radio signal.

  In addition, each of the second base station devices determines that the first base station device is not a neighboring cell, and the first base station device is in the vicinity of the second station data that is currently owned by the second base station device. If it is registered as a cell, the neighboring cell information corresponding to the first base station apparatus is deleted from the second station data.

  Further, the base station control device instructs the first base station device to transmit the measurement radio signal. The base station control device instructs the first base station device to transmit the measurement radio signal when a certain base station device restarts. The base station control apparatus periodically and repeatedly issues a measurement radio signal transmission instruction to the first base station apparatus, thereby enabling dynamic update of neighboring cell information.

  According to the disclosed method, an operator of a cellular mobile radio communication system can facilitate a complicated system design considering frequency or frequency band repetition.

  Further, according to the disclosed method, when the base station is expanded, it is not necessary to individually create the station data of the expanded base station, and it is not necessary to update the station data of the neighboring base stations that are affected.

  Furthermore, according to the disclosed method, even when the radio wave environment changes due to the construction or dismantling of buildings around the base station, the base station can update the station data autonomously and dynamically.

  Other objects, features and advantages will become apparent upon reading the following specification (the best mode for carrying out the invention) when taken in conjunction with the drawings and the claims.

Hereinafter, it will be described in more detail with reference to the accompanying drawings. The drawings show preferred embodiments. However, it can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[System configuration example]
The cellular mobile radio communication system according to an embodiment includes a plurality of base stations (strictly, base station apparatuses) and a plurality of base station control stations (strictly, base station control apparatuses).

  Referring to FIG. 1A showing an example of a system configuration, a cellular mobile radio communication system SYS includes a plurality of base stations A and B adjacent to each other and antennas A and B connected to the base stations A and B, respectively. . Here, for convenience of explanation, illustration of the base station control station is omitted. Actually, one base station control station controls a large number (several tens) of base stations, but only two base stations are shown here. The station data A and B corresponding to the base stations A and B are stored in the storage devices of the base stations A and B, respectively. Each station data is data related to neighboring cell information of each base station.

  Base station A and antenna A constitute a cell corresponding to a first area (service area) SA-A for providing a mobile communication service to a mobile terminal. Further, the base station B and the antenna B constitute a cell corresponding to the second area SA-B for providing a mobile communication service to the mobile terminal.

In this cellular mobile radio communication system SYS, in order to autonomously generate station data related to neighboring cell information of each base station with minimal human intervention, each base station and each base station control station It has a function.
(1) A function of measuring the intensity of radio waves between base stations in order to determine whether the base stations are adjacent to each other or have a neighboring cell configuration relationship.
(2) A function of managing neighboring cell information based on the result of determination that the neighboring cell has a configuration relationship.
(3) A function of generating neighboring cell information after restarting the base station.
(4) A function of periodically generating neighboring cell information and dynamically updating neighboring cell information. (5) A function for starting the generation processing of neighboring cell information according to the operation of the maintenance person.
(6) A function for the base station control station to generate timing and notify the subordinate base stations so that the base stations can communicate with each other.
(7) A function that allows customization of surrounding cell information by a maintenance person and protects it.
(8) A function for creating auxiliary data for generating neighboring cell information using geographic information of GPS (Global Positioning System).
(9) A function of excluding base stations that are not geographically neighboring cells from the candidate of neighboring cells using GPS geographic information.

[System operation example]
Next, various operation examples in the cellular mobile radio communication system SYS of one embodiment will be described. Note that each of the processes described below can be implemented by selecting and combining any or all of the processes.

[First operation example]
In this cellular mobile radio communication system SYS, base stations measure the radio field strength by the following method, and determine that they are neighboring cells from the measured radio field strength.

1A and 1B are diagrams for explaining a state in which radio waves are measured by performing communication between base stations A and B. FIG. Base station A and base station B are base stations that are constructed geographically in the vicinity of each other. Each of the base stations A and B starts the operation in response to reception of operation timing (start trigger) for autonomous generation of neighboring cell information.

  The base station A transmits radio waves (measurement radio signals) using a measurement radio channel. Base station B receives the measurement radio wave from base station A and measures the intensity of the radio wave. When the measured radio field intensity exceeds the reference level (threshold value) a, the base station B determines the base station A as a peripheral cell of the base station B. On the other hand, the base station B determines that it is not a neighboring cell when the radio field intensity is equal to or lower than the reference level a. In addition, the base station B reads the base station ID (identification information) included in the measurement radio wave and recognizes the base station A.

  When the base station B recognizes the base station A as a neighboring cell as a result of the determination, the base station B registers the base station ID of the base station A in the list of neighboring cells (station data B) managed by the base station B. Thereafter, a message for requesting the station data A of the base station A is transmitted to the base station A via the backbone (wired line) based on the base station ID.

  The base station A that has received the request responds to the base station B with its own station information acquired from the station data A. The base station B reflects the information obtained from the base station A as peripheral cell information in the station data B managed by the base station B. Alternatively, if it is determined that the base station A is not a neighboring cell, and the base station A is registered as a neighboring cell in the station data B currently held by the base station B, the Delete the neighboring cell information of A. The reference level a of the radio field intensity determined as the peripheral cell is managed as a system parameter.

  Since the radio channel for measuring the radio field intensity is common between the base stations A and B, it cannot be measured if a plurality of base stations A and B output radio waves simultaneously. Timing control between A and B is necessary.

  Referring to FIG. 1C, depending on the configuration of the cellular mobile radio communication system SYS, neighboring base stations 2a to 2f adjacent to the own station 1 and quasi-peripheral bases adjacent to the neighboring base stations 2a to 2f and not adjacent to the own station 1 Station data with the stations 3a to 3l may be required together.

  The quasi-peripheral base station information refers to a list of quasi-peripheral base stations that are peripheral base stations of the peripheral base station, based on the peripheral base station information acquired by collecting the peripheral cell information. It is assumed that the station data includes list information of base stations surrounding the station. Then, based on the information of the list of semi-peripheral base stations, inquires about the station data to the semi-peripheral base station, receives the station data notification of the semi-peripheral base station, Add and update base station information.

  Next, in the cellular mobile radio communication system SYS, a radio channel allocation method for communication between base stations and measuring radio wave intensity will be described.

  A radio channel for measuring the intensity of radio waves between base stations is determined and assigned in advance. Depending on the radio transmission method of the mobile radio communication system SYS, the radio channel allocation method for radio field intensity measurement differs.

(1) In the case of WCDMA (see FIG. 2A)
When the wireless transmission system of the cellular mobile radio communication system SYS is wideband code division multiple access (WCDMA), the signal strength is obtained by coding a null (NULL) signal using a base station ID in a CDMA spreading code. Each radio frame is transmitted by being assigned to a measurement radio channel (measurement channel). The partner base station that has received the radio frame can know the base station ID of the transmission source from the spreading code.

(2) In case of TDMA (see FIG. 2B)
When the radio transmission scheme of the cellular mobile radio communication system SYS is time division multiple access (TDMA), a specific time slot is secured in the measurement channel. This time slot is in the time domain common to all base stations. Therefore, according to the sequence control, one of the base stations emits (transmits) a measurement radio wave for each radio frame. This measurement radio wave includes the transmission source base station ID as a transmission signal. Here, the time slot is assigned a length sufficient for measurement. Each cell is assigned a different specific frequency.

(3) In the case of OFDMA / OFDM (see FIG. 2C)
When the wireless transmission system of the cellular mobile radio communication system SYS is Orthogonal Frequency Division Multiple Access (OFDMA) / Orthogonal Frequency Division Multiplexing (OFDM), it is composed of specific subchannels and time slots. Assigned as a measurement radio channel. This burst area is the same area in all base stations. Therefore, according to the timing control, one of the base stations emits a measurement radio wave. This measurement radio wave includes the transmission source base station ID as a transmission signal. Here, the burst size is set to a size necessary and sufficient for measurement. Further, since the frequency band of the OFDMA / OFDM system is wide, the physical carrier is made discrete in order to absorb the difference in radio wave environment due to high and low frequencies.

  In any of the wireless transmission methods described above, it is inefficient to occupy valuable radio resources for measurement, so use a signal channel and a shared area for other uses (C-Plane / U-Plane), The usage allocation for a specific period may be made by time management or mode management. In addition, each base station sets the measurement radio channel in a reception state and allows a measurement signal from another base station to be received if it is not the transmission timing of its own measurement radio wave. On the contrary, in the case of the transmission timing of the own station, the measurement radio channel is set in the transmission state and the measurement radio wave is transmitted.

[Second operation example]
In the cellular mobile radio communication system SYS, the base station control station notifies the timing when the base stations measure the radio field intensity by the following method.

  FIG. 3A shows a configuration of a cellular mobile radio communication system SYS in the second operation example. FIG. 3B shows a message exchange sequence in the system configuration of FIG. 3A. FIG. 3C shows a configuration of the cellular mobile radio communication system SYS in a modification of the second operation example. FIG. 3D shows a message exchange sequence in the system configuration of FIG. 3C.

  The cellular mobile radio communication system SYS shown in FIG. 3A employs a configuration in which one base station control station A manages three base stations A, B, and C under its control. Actually, one base station control station controls a large number (several tens) of base stations, but only three base stations are shown here for convenience of explanation.

  3A and 3B, the base station control station A that has received the trigger for starting the autonomous generation processing of neighboring cell information instructs the subordinate base stations A, B, and C to emit measurement radio waves in order. The instructed base station transmits a measurement radio wave (measurement radio signal) on a radio channel for radio field intensity measurement assigned in advance. If the use of a radio channel reserved for measurement is determined at a timing such as time, the next designated timing is set.

  While the base station A is transmitting the measurement radio signal to the measurement radio channel, the other base stations B and C receive and measure the radio waves of the base station A. Thereafter, each of the base stations B and C determines whether the base station A is a neighboring cell based on the radio field intensity. Similarly, the base stations B and C sequentially transmit measurement radio signals.

  When the base station controller A completes the transmission instruction of the measurement radio signal to all of the subordinate base stations A, B, C, it notifies the subordinate base stations A, B, C of completion. Each of the base stations A to C that has received the completion notification updates the list of neighboring cells of the station data (to be described in detail later with reference to FIG. 7B) based on the determination result, and sends the station data from the neighboring base station to the backbone Collecting via (wired line), that is, exchanging own station information, and generating neighboring cell information as station data.

  The cellular mobile radio communication system SYS shown in FIG. 3C employs a configuration in which the neighboring base station D belongs to another base station control station B. When viewed from the base station A, the peripheral base station D belongs to a base station control station B different from the own station. In order to collect the neighboring cell information of the base station A and the base station B, transmission of measurement radio waves from the base station D is also necessary.

  In FIG. 3C and FIG. 3D, the base station control station A that has received the start trigger of the autonomous generation process of the neighboring cell information creates the neighboring cell information of the subordinate base stations A and B with respect to the base station D. Even instruct to emit measurement radio waves. However, since the base station control station A cannot directly communicate with the base station D, it is necessary to transmit an instruction message via the base station control station B.

  At this time, if there is no conflict with the creation timing of the neighboring cell information for the base station under its control station, the base station control station B sends the measurement radio signal instruction message from the base station control station A to the base station D as it is. Forward. However, the base station control station B responds to the base station control station A with an inexecutable message when there is a competition in radio wave transmission timing for generating peripheral cell information of the base station under its control station. In that case, the base station control station A transmits the instruction message again at another timing.

  Similarly, in the exchange of own station information after the radio wave measurement is completed, the base stations A and B use the transfer function of the base station control station B to the base station D under the control of the base station control station B. Request notification.

[Third operation example]
For example, in the cellular mobile radio communication system SYS adopting the configuration shown in FIG. 3A described above, it is possible to start generation of neighboring cell information when the base station is restarted by the following method. FIG. 4 shows the sequence.

  The timing at which each of the base stations A to C autonomously generates the neighboring cell information is set to be immediately after resumption such as when a certain base station is restarted by a maintenance person due to failure recovery. For example, when the base station A completes the restart, the base station A notifies the base station control station A that the restart has been completed with a message. After that, the other base stations B and C in the order instructed by the base station control station A emit measurement radio signals on the radio channel for measuring the radio field intensity, so that the base station A determines the neighboring cells, Peripheral cell information is generated as station data.

[Fourth operation example]
For example, in the cellular mobile radio communication system SYS adopting the configuration shown in FIG. 3A described above, the neighboring cell information is periodically generated and dynamically updated by the following method. FIG. 5 shows the sequence.

Base stations A, B, and C constituting the cellular mobile radio communication system SYS periodically and autonomously generate neighboring cell information based on an instruction from the base station control station A (reception of an instruction message). Here, the cycle is a large period such as one day unit. The cycle timing is managed by a timer (clock) in the base station control station A. When the timing time arrives, the base station control station A sequentially transmits measurement radio waves to the subordinate base stations A to C. Instruct. Since the update of the station data accompanies the restart of the base station, it is preferable to adjust the cycle so that the neighboring cell information is updated at night.

[Fifth operation example]
In the cellular mobile radio communication system SYS, it is possible for a maintenance person (worker) to instruct the time and to start generating neighboring cell information.

  FIG. 6A shows a configuration of a cellular mobile radio communication system SYS in the fifth operation example. 6B and 6C show message exchange sequences in the system configuration of FIG. 6A. In this cellular mobile radio communication system SYS, an operator can issue an instruction by the following two methods when updating station data of a base station.

  In the first method, the worker A visits the site (station A) where the base station A is installed and directly operates the base station A. As shown in FIGS. 6A and 6B, the worker A inputs a station data update command to the base station A in the station A. The base station A transmits a station data update control request message to the upper base station control station A.

  Receiving this message, the base station control station A causes a generation sequence of neighboring cell information to the other base stations B and C under its control. When transmission of measurement radio waves from all of the subordinate base stations B and C is completed, the base station control station A issues a notification message of completion of station data update control to the base station A, and the base station A Update processing is performed. When the update of the station data is completed, the base station A notifies the worker A of the completion of the update of the station data.

  In the second method, an instruction is issued from the maintenance server that manages the cellular mobile radio communication system SYS. As shown in FIGS. 6A and 6C, the worker B transmits a station data update command to the base station control station A via the maintenance server B installed in the station B. Receiving this command, the base station control station A activates the neighboring cell information update sequence for the subordinate base stations A, B, and C. When the base station control station A completes the transmission of the measurement radio waves by all of the subordinate base stations A to C, the base station control station A transmits a station data update completion notification message to the maintenance server B.

[Sixth operation example]
In the cellular mobile radio communication system SYS, neighboring cell information customized by a maintenance person is protected.

  The maintenance person of the base station A shown in FIG. 7A can change the station data A related to the neighboring cell information by the maintenance operation. As shown in FIG. 7B, among the neighboring cell information of the station data A, as shown in FIG. 7B, an update impossible flag indicating permission / non-permission of change by autonomous control for each neighboring cell. (ON / OFF) is provided.

  The initial value of the non-updatable flag is “OFF”, and the maintenance person can arbitrarily set ON / OFF when the station data A is updated. When the base station A autonomously updates the neighboring cell information, the base station A supplies power (radio waves) necessary for the neighboring cell due to a change in the radio wave environment to the neighboring cell having the non-updatable flag set to “ON”. The peripheral cell information is not deleted even if it falls below (strength).

  Further, as shown in FIG. 7C, a peripheral cell addition impossible list, which is a list of cells that should not be added as peripheral cells, is set as station data A. Even if the base station A determines that it can be newly added as a neighboring cell as a result of the radio field intensity measurement, the cell registered in the neighboring cell addition unavailable list is not added as a neighboring cell.

[Seventh operation example]
In the cellular mobile radio communication system SYS shown in FIG. 8, it is possible to create auxiliary data for creating neighboring cell information using GPS geographic information.

  At the time of construction, each base station A, B, C measures latitude and longitude information by a known method using GPS, and is registered as position information in its own station data. The base station control station A holds the latitude and longitude information of the subordinate base stations A to C as its own station data for each station. Further, the base station control station A holds the cell radii A to C of the base stations A to C for each station.

  Before generating the neighboring cell information autonomously, the base station control station A notifies the subordinate base stations A to C of a list of neighboring cell candidate base stations that are geographically neighboring. The base station control station A determines whether the base station A is a candidate for a neighboring cell from the distance between the base stations for the base station B and the base station C.

  When the value obtained by adding the margin value b to the sum of the cell radius A of the base station A and the cell radius B of the base station B is larger than the geographical distance between the base stations A and B, the base station B Are determined as neighboring cell candidates of the base station A. If the geographical distance between the base station A and the base station C is greater than the sum of the cell radii A and C plus the margin value b, it is determined not to be a neighboring cell candidate.

  The base station control station A notifies the base station A of a list of neighboring cell candidates before performing the autonomous neighboring cell information generation process. The list of candidate cells is used to make the neighboring cell candidates subject to radio wave intensity measurement when generating neighboring cell information. The base station control station A manages the margin value b as a system parameter.

[Eighth operation example]
In the cellular mobile radio communication system SYS, it is possible to exclude base stations that are not geographically neighboring cells from the neighboring cell information using GPS geographic information.

  In the case where the determination function of the neighboring cell candidate in the seventh operation example described above is not used, as a result of the measurement of the radio wave intensity, it cannot be said that it is a neighboring cell geographically, but it becomes a neighboring cell in the radio wave environment. There is. For example, when a mobile phone terminal is used at a cape, radio waves may be picked up by a base station at the cape on the opposite bank and judged as a neighboring cell. In this case, since it is a geographical condition that is far from the distance and cannot be a handover destination, it cannot be a neighboring cell.

  After updating the neighboring cell information of the station data, the base station calculates the geographical distance of the neighboring cell. Under the same conditions as in the seventh operation example described above, a base station located at a distance that cannot be said to be a neighboring cell is deleted from the neighboring cell information. Further, it may be registered as a station data in the peripheral cell non-addition list (see FIG. 7C).

[First Modified Configuration Example of System]
The cellular mobile radio communication system SYS1 according to another embodiment includes a plurality of base stations (base station devices). The cellular mobile radio communication system SYS1 is a radio network control device (RNC: Radio Network) as a plurality of base station control stations (base station control devices) included in the cellular mobile radio communication system SYS in the above-described embodiment. Controller) is not provided as an individual placement element. In the cellular mobile radio communication system SYS1, each base station has an RNC function (for example, a handover control function, etc.), and provides mobile communication services to a plurality of mobile terminals under its cooperation with a host device.

Referring to FIG. 9A showing an example of a system configuration, a cellular mobile radio communication system SYS is shown.
1 includes a plurality of base stations A1, B1, B2 adjacent to or adjacent to each other and antennas A1, B1, B2 connected to the base stations A1, B1, B2, respectively. Here, for convenience of explanation, only three base stations are shown. Station data respectively corresponding to the base stations A1, B1, and B2 is stored in each storage device included in the base stations A1, B1, and B2. Each station data is data related to neighboring cell information of each base station.

  The base station A1 and the antenna A1 constitute a cell corresponding to a first area (service area) SA-A1 for providing a mobile communication service to a mobile terminal. Further, the base stations B1 and B2 and the antennas B1 and B2 constitute cells corresponding to the second and third areas SA-B1 and SA-B2 for providing mobile communication services to the mobile terminals, respectively.

In this cellular mobile radio communication system SYS1, in order to autonomously generate station data related to neighboring cell information of each base station with minimal manual operation, each base station moves according to the embodiment described above. The wireless communication system SYS has the above functions (1) to (5) and (7) to (9) as well as the following functions (10), (11), and (12).
(10) A function of determining the measurement timing of the radio wave intensity by negotiation between base stations and starting the measurement of the radio wave intensity for generating neighboring cell information.
(11) A function in which each base station determines the measurement timing by inter-base station communication using a radio channel.
(12) A function in which each base station determines measurement timing by communication between base stations using a transmission channel (wired channel) via a backbone (core network).

[Operation Example in First Modified Configuration of System (Ninth Operation Example)]
Next, various operation examples in the cellular mobile radio communication system SYS1 adopting the configuration shown in FIG. 9A will be described. In addition, each process in the first modified configuration described below can be performed by selecting and combining any of the above-described processes.

  In this cellular mobile radio communication system SYS1, the measurement timing of radio field intensity is determined by negotiation between base stations by the following method, and measurement of radio field intensity for generating neighboring cell information is started. Then, each base station measures the radio field intensity with other base stations, and determines that it is a neighboring cell from the measured radio field intensity.

  First, referring to FIG. 9B showing an example of an inter-base station negotiation sequence, the base station A1, which intends to start measuring the radio field intensity with the establishment of its own station or the like, uses the dedicated channel α for inter-base station communication. On the other hand, a measurement start request message is transmitted at a random time (at an arbitrary measurement timing determined by the own station). This request message is a transmission control procedure defined by the protocol of layer 2 instead of layer 3. Here, the inter-base station communication dedicated channel α is a channel commonly used by all base stations in the cellular mobile radio communication system SYS1.

  Each base station is in a reception state of the inter-base station communication dedicated channel α except for the time for transmitting the request message, and can receive request messages from other base stations. This request message includes identification information (base station ID) of the transmission source base station, and it is possible to determine from which base station the received base station is transmitted.

  The other base stations B1 and B2 that have received the request message from the base station A1 can receive the measurement radio wave (measurement radio signal) through the measurement radio channel β and can measure the radio field intensity (measurement start state). To.

The base station A1 that has transmitted the request message emits the measurement radio wave to the radio channel β for radio field intensity measurement after a predetermined time (specified time) S, unless a negative message is returned from the other base stations B1 and B2. (Send.

  Thereafter, each base station measures the radio field intensity with other base stations and determines that it is a neighboring cell from the measured radio field intensity, as in the first operation example described above.

  Next, referring to FIG. 9C showing another example of the sequence of negotiation between base stations, two base stations A1 and A2 (base station A2) that intend to start measurement of radio field intensity with the establishment of their own stations and the like. (Not shown in FIG. 9A) transmits a measurement start request message to the dedicated inter-base station communication channel α at almost the same measurement timing determined by each station. However, in this example, the measurement start request messages transmitted by the base stations A1 and A2 collide with each other on the dedicated channel α for the other base stations B1 and B2.

  In this way, when a request message collision occurs, the base stations B1 and B2 cannot read the base station ID, which is a parameter in the request message, due to radio wave interference. As a result, the base stations B1 and B2 determine that there has been a request message collision.

  The base stations B1 and B2 that have detected the collision each transmit a collision confirmation message within the specified time S using the dedicated channel α. In FIG. 9C, the collision confirmation message transmitted from the base station B2 is not shown. For example, the collision confirmation message is NULL data.

  When the base station A1 and the base station A2 confirm the collision confirmation message, the base station A1 and the base station A2 determine that the measurement start request message from itself has collided with another base station. After confirming the collision, the base station A1 and the base station A2 retransmit the request message after a random time has elapsed from the specified time S, respectively.

  As a result, the base station A1 that has transmitted the request message emits a measurement radio wave to the radio channel β for radio wave intensity measurement after a specified time S, unless a negative message is returned from the other base stations B1 and B2.

  Referring again to FIG. 9A, in each of the examples of the inter-base station negotiation sequence described above, the radio channel α can be used as the inter-base station communication dedicated channel α in order to determine the radio wave intensity measurement timing. . In this case, each base station transmits and receives signals such as a measurement start request message and a collision confirmation message using the dedicated radio channel α.

  The radio channel α is a physical channel shared for uplink and downlink (transmission / reception). Therefore, depending on the duplex method to be used, it is necessary to take into account the provision of a slot for both uplink and downlink.

  In addition, the radio channel α for negotiation between base stations transmits a signal using the maximum power of the base station A1, so that a measurement start request message reaches a distant base station as much as possible. That is, negotiation is performed on the base stations B1 and B2 in a range where the measurement start request message from the base station A1 reaches.

In addition, as shown in FIG. 9D, in each of the above-described inter-base station negotiation sequences, a core network (for example, IP (Internet) Protocol) network and ATM (Asynchronous Transfer Mode) network) wired channel α can be used. In this case, each base station
Signals such as a measurement start request message and a collision confirmation message are transmitted and received using a dedicated wired channel α.

  When the wired channel α is used as the inter-base station communication dedicated channel α, the measurement start request message transmitted by the base stations A1 and A2 does not interfere with radio waves, unlike when the wireless channel α is used. When the other base stations B1 and B2 receive the measurement start request messages from both the base stations A1 and A2 within a predetermined time, they determine that there is a collision.

  When the wired channel α via the backbone is used in the inter-base station negotiation, the interface is the same as that in the inter-base station communication for enabling the mobile terminal to perform handover between the base stations. However, since it is necessary to transmit without specifying the partner base station, broadcast communication is performed to a plurality of opposing base stations. When relaying by another node (a host device such as a gateway device) is necessary for communication between base stations, a message transfer function is provided in this node.

  In addition, if the range of the target base station that broadcasts the measurement start request message is too large, the probability of collision of the request message increases, and if it is too narrow, the range of the base station to transmit the request message that is broadcast is finalized by this technique. Therefore, data close to the peripheral cell information to be generated is necessary from the beginning. For this purpose, an appropriate range is defined in advance by system parameters.

  The following two methods are conceivable for parameter definition. In the case of a mobile radio communication system in which a base station has a host device, a base station under (subordinate to) the host device is defined as a range. If there is no host device, each base station is measured at the time of construction, and the location information (latitude / longitude) managed by the system operator (maintenance person) is used to generate geographical information from the base station that generates neighboring cell information. A list of target base stations close to is set as the range of the neighboring cell measurement. Here, the host device is a gateway device or various servers in the core network.

[Second Modified Configuration Example of System]
The cellular mobile radio communication system SYS2 in another embodiment includes a plurality of base stations (base station devices). The cellular mobile radio communication system SYS2 is configured to individually divide radio network control apparatuses (RNCs) as a plurality of base station control stations (base station control apparatuses) included in the cellular mobile radio communication system SYS in the above-described embodiment. Not provided as a placement element. In the cellular mobile radio communication system SYS1, each base station has an RNC function, and provides a mobile communication service to a plurality of mobile terminals under its cooperation with a host device.

  Referring to FIG. 10A showing an example of the system configuration, the cellular mobile radio communication system SYS2 includes a plurality of base stations BTS1 to BTS7 adjacent to or adjacent to each other and antennas connected to the base stations BTS1 to BTS7, respectively. . Here, the base station BTS1 is a serving base station where the mobile terminal MS is located, and the base stations BTS2 to BTS6 are peripheral base stations for the base station BTS1. Base station BTS7 is not a peripheral base station for base station BTS1.

  Each base station and each antenna constitute a cell corresponding to each area (service area) for providing a mobile communication service to a mobile terminal. Station data respectively corresponding to the base stations BTS1 to BTS7 are stored in each storage device included in the base stations BTS1 to BTS7. Each station data is data related to neighboring cell information of each base station.

In this cellular mobile radio communication system SYS2, in order to autonomously generate station data related to neighboring cell information of each base station with minimal manual operation, each base station moves according to the embodiment described above. Similar to the wireless communication system SYS, it has at least one of the above functions (1) to (5) and (7) to (9), and each base station and mobile terminal has the following functions (13) and (14). It has further.
(13) For example, the mobile terminal MS residing in the cell of the base station BTS1 measures the radio field intensity of the measurement radio waves (measurement radio signals) from the base stations BTS2 to BTS7, and lists surrounding cells for the base station BTS1. A function of creating information and notifying the base station BTS1.

At this time, the mobile terminal MS measures the radio field intensity and notifies the neighboring cell list information while setting the control channel or waiting (idle). Here, the mobile terminal MS is a mobile terminal having a special function or a mobile terminal used by a general user.
(14) The base station BTS1 notified of the neighboring cell list information from the mobile terminal MS has a function of generating neighboring cell information as station data based on the information.

[Operation Example in Second Modified Configuration of System (Tenth Operation Example)]
Next, various operation examples in the cellular mobile radio communication system SYS2 adopting the configuration shown in FIG. 10A will be described. In addition, each process in the second modified configuration described below can be performed by selecting and combining any of the above-described processes.

  In this cellular mobile radio communication system SYS2, the mobile terminal MS located in the cell of the base station BTS1 measures the radio field intensity of the measurement radio waves from the base stations BTS2 to BTS7 by the following method, In response, neighboring cell list information for the base station BTS1 is created and notified to the base station BTS1.

  Referring also to FIGS. 10A to 10E, the base station BTS1 that needs to create neighboring cell information with the establishment of its own station or the like uses the mobile terminal MS located in the subordinate cell as a tool.

  The mobile terminal MS automatically receives radio waves for measurement transmitted from the base stations BTS2 to BTS7 at a certain timing by a known technique, and measures the radio wave intensity. The radio channel for measuring the radio field intensity is the same as that of the mobile radio communication system SYS of the embodiment described above. That is, the radio channel for measuring the radio field intensity is determined in advance according to the above-described radio transmission method. The measurement radio wave includes each base station ID.

  The mobile terminal MS manages, as list data, base stations whose radio field intensity is a predetermined value P or more. The prescribed value P is defined in consideration of the minimum power that allows the inter-cell diversity of the mobile terminal MS, and is stored as a system parameter of the mobile terminal MS. In a geographical location where the mobile terminal MS has performed the radio field intensity measurement, it means that a base station having the radio field intensity equal to or greater than the specified value P can perform cell movement or diversity handover. The base station of the mobile station MS is in a relationship of neighboring cells with respect to the cell where the mobile terminal MS is located.

  The mobile terminal MS notifies the serving base station BTS1 that manages the call processing of its own terminal at that time of the neighboring cell group list information (neighboring cell list information). Since the list of neighboring cells that can be generated by the mobile terminal MS differs depending on the geographical position of the mobile terminal MS in the cell, by performing periodic measurements, the surroundings at points in the cell according to the terminal movement It also detects cell differences. Accordingly, the mobile terminal MS keeps a list of the total number of neighboring cells that can be detected by measurement.

  When the mobile terminal MS changes its base station (located cell) due to cell movement, the mobile terminal MS again measures the radio field strength of neighboring base stations after the location registration, and Notify list information of neighboring cell groups.

  The serving base station BTS1 notified of the neighboring cell list information from the mobile terminal MS determines (selects) the neighboring cell based on the base station ID included in the neighboring cell list information. Thereafter, the base station BTS1 requests the base stations BTS2 to BTS6 certified as neighboring cells for the position (latitude / longitude) information and capability information of the base station, and sends the response to the database in the base station BTS1. It is reflected in a certain peripheral cell management table.

  Here, the base station BTS1 receives notification of neighboring cell list information from a plurality of mobile terminals MS. When the base station BTS1 is notified of neighboring cell list information from a plurality of mobile terminals MS within a certain period of time, the base station BTS1 determines a list of neighboring cells using one of the following algorithms AL1 and AL2.

AL1: All cells included in notifications from a plurality of mobile terminals AL2: Cells included in more than a certain number of notifications The base station BTS1 moves to the periphery every time the subordinate mobile terminal MS moves. Receive notification of cell list information. Since rewriting neighboring cell information every time a notification is received is a wasteful process, the base station BTS1 accumulates the received neighboring cell list information by setting a deadline, and updates neighboring cell information at a periodic timing. I do. Alternatively, the base station BTS1 changes the neighboring cell information as station data every time the neighboring cell determination is changed by the above algorithm.

  In the above-described processing, the mobile terminal MS measures the radio field intensity and notifies the neighboring cell list information while setting or waiting for the control channel (idle).

  As shown in the sequence of FIG. 10C and FIG. 10D, the neighboring cell list information is transmitted to the base station BTS1 in the outgoing (calling) procedure or the incoming (calling) procedure for the mobile terminal MS to start communication. Notice.

  The radio channel for notifying the base station BTS1 of the neighboring cell list information uses an individual channel that is a control channel between the mobile terminal MS and the base station BTS1. Therefore, the mobile terminal MS notifies the neighboring cell list information using the dedicated channel after setting the dedicated channel of the calling procedure. In this case, since notification is performed at the time of call setup, if the mobile terminal MS does not perform call setup while in a certain cell, notification of the neighboring cell list information to the base station BTS1 is not performed. Note that the notification of the neighboring cell list information to the base station BTS1 does not affect the call setting sequence, and therefore can be performed in parallel with the call setting sequence after setting the control (individual) channel.

  Further, as shown in the sequence of FIG. 10B and FIG. 10E, after the mobile terminal MS is set up (position registration) following the power-on, or after the mobile terminal MS moves, After the change and the cell location registration change is completed, the mobile terminal MS starts a process of notifying the neighboring cell list information.

  Thereafter, when the mobile terminal MS creates a list of neighboring cells, the mobile terminal MS notifies the neighboring cell base station BTS1 of neighboring cell list information. The notification message uses a common channel that is a control channel of the layer 2 protocol. The common channel is used because a dedicated channel is not established between the mobile terminal MS and the base station BTS1.

  Since the neighboring cell list information can be notified to the base station BTS1 at any time during standby after the location registration, after the measurement of the base station power (measurement radio wave intensity) at the mobile terminal MS is completed, The mobile terminal MS transmits a neighboring cell list notification message.

  Here, the mobile terminal MS is a mobile terminal (special terminal) having a special function or a mobile terminal (general terminal) used by a general user.

When the special terminal used by the system operator (maintenance person) is the mobile terminal MS, the special terminal notifies the base station BTS1 of the neighboring cell list information by one or a few specific terminals. For this purpose, the base station BTS1 always uses the neighboring cell list information received from the special terminal as information for generating neighboring cell information.
When a base station is built for the purpose of expanding the area or improving the quality, the maintenance person uses a special terminal to circulate around the base station and build the neighboring cell information. To be implemented.

  On the other hand, when the general terminal used by the general user is the mobile terminal MS, the base station BTS1 is notified of neighboring cell list information from an unspecified number of terminals at unspecified timing. By periodically updating the neighboring cell information, the base station BTS1 can update the neighboring cell information following a change in the radio wave environment in real time during operation of the mobile radio communication system.

  According to the second modification described above, the base station BTS1 can generate the neighboring cell information more accurately by using the mobile terminal MS as a tool.

[Third Modification of System (Eleventh Operation Example)]
The cellular mobile radio communication system SYS2 in another embodiment described above can be further modified as shown in FIG.

  The cellular mobile radio communication system SYS3 including a plurality of base stations (including antennas) BTS11 to BTS14 generates neighboring cell information by diverting the function of the existing mobile terminal MS1.

  In this cellular mobile radio communication system SYS3, the mobile terminal MS1 located in the cell of the serving base station BTS11 receives a radio signal from a plurality of other base stations BTS12 to BTS14 through a signaling channel and detects a modulation code. Then, the base station BTS 11 is notified of the list information of the detected modulation codes during the setting of the dedicated channel.

  The base station BTS11 notified of the modulation code list information from the mobile terminal MS1 converts the modulation code list information into IDs (identification information) of the base stations BTS12 to BTS14, and generates neighboring cell information as station data. .

  In the existing W-CDMA specification, a mobile terminal receives a radio signal from a base station via a signaling channel while waiting, and sets the detected CDMA modulation code of the base station to the serving base station as a dedicated channel setting procedure. Notify during. In the serving base station, it is possible to reversely convert the list of modulation codes notified from the mobile terminal into a base station ID to obtain a list of base station IDs.

  By diverting this function, it can be realized by adding a part of the function in the mobile radio communication system SYS2 of the above-described another embodiment to the function of the existing mobile terminal and base station. .

  However, the criterion for determining the neighboring cell is whether or not the radio signal can be discriminated through the signaling channel, which is different from the neighboring cell list information obtained as a result of the processing in the mobile radio communication system SYS2 of the other embodiment described above.

  The functions added to the base station of the existing system are a database for managing the neighboring cell list information for each mobile terminal and a function for periodically generating neighboring cell information based on this database.

[Others]
The following additional notes are further disclosed with respect to the above-described embodiments and modifications.

(Supplementary note 1) An autonomous generation method of neighboring cell information in a cellular mobile radio communication system including at least a plurality of base station apparatuses each constituting a cell corresponding to a service area for providing a mobile communication service to a mobile terminal;
The first base station apparatus
Transmitting a measurement radio signal through a radio channel for measuring radio field strength;
Each of the other second base station devices sequentially
Measuring the radio field intensity of the measurement radio signal received from the first base station apparatus;
Determining whether the first base station apparatus is a neighboring cell according to the measured radio field intensity;
If it is determined that the first base station apparatus is a neighboring cell, identification information of the first base station apparatus is registered in the second station data of the neighboring cell owned by the first base station apparatus;
Obtaining first station data held by the first base station device based on the identification information;
Reflecting the first station data acquired from the first base station apparatus as the neighboring cell information in the second station data held by itself;
Autonomous generation method of neighboring cell information.

(Supplementary note 2) The method for autonomously generating neighboring cell information according to supplementary note 1, wherein the radio channel for measuring radio field intensity is predetermined according to a radio transmission method.

(Appendix 3) Each second base station apparatus recognizes the first base station apparatus based on the identification information included in the measurement radio signal. Autonomous generation of neighboring cell information according to appendix 1. Method.

(Supplementary Note 4) Each of the second base station devices determines that the first base station device is not a neighboring cell, and the second base station device currently owns the first base station device. The autonomous cell generation method for peripheral cell information according to appendix 1, wherein peripheral cell information corresponding to the first base station device is deleted from the second station data when is registered as a peripheral cell.

(Supplementary note 5) Further comprising at least one base station controller;
The autonomous generation method of neighboring cell information according to claim 1, wherein the base station control device instructs the first base station device to transmit the measurement radio signal.

(Supplementary note 6) Further comprising at least one base station controller;
When there are a plurality of base station controllers, the first base station controller directly instructs the subordinate first base station apparatus to transmit the measurement radio signal, and the second base station controller The autonomous generation method of neighboring cell information according to supplementary note 1, wherein a transmission instruction of the measurement radio signal from the first base station control device is transferred to another subordinate base station device.

(Supplementary note 7) Further comprising at least one base station controller;
The autonomous generation method of neighboring cell information according to claim 1, wherein the base station control device instructs the first base station device to transmit the measurement radio signal when a certain base station device is restarted.

(Supplementary note 8) Further comprising at least one base station controller;
The neighbor cell information according to appendix 1, wherein the base station control device periodically and repeatedly performs an instruction to transmit the measurement radio signal to the first base station device, and dynamically updates neighboring cell information. Autonomous generation method.

(Supplementary note 9) Further comprising at least one base station controller;
The autonomous generation method of neighboring cell information according to supplementary note 1, wherein the base station control device instructs the first base station device to transmit the measurement radio signal according to an instruction from a maintenance person.

(Supplementary note 10) The autonomous generation method of peripheral cell information according to supplementary note 1, wherein the peripheral cell information to be protected can be customized by a maintenance person.

(Supplementary note 11) The autonomous generation method of peripheral cell information according to supplementary note 1, wherein auxiliary data for creating the peripheral cell information is generated using GPS (Global Positioning System) geographic information.

(Supplementary note 12) The autonomous generation method of peripheral cell information according to supplementary note 1, wherein, using geographical information of GPS (Global Positioning System), peripheral cell information corresponding to a base station apparatus that is not geographically a peripheral cell is excluded from station data.

(Supplementary note 13) The first base station apparatus determines the measurement timing of the radio field intensity by negotiation with the second base station apparatus via a channel dedicated for communication between base station apparatuses;
The autonomous generation method of neighboring cell information according to claim 1, wherein the second base station apparatus starts measurement of the radio wave intensity for generating the neighboring cell information.

(Supplementary note 14) The peripheral cell information autonomous generation method according to supplementary note 13, wherein the dedicated channel for communication between base station apparatuses is a wireless channel or a wired channel.

(Supplementary note 15) A method for autonomously generating neighboring cell information in a cellular mobile radio communication system including at least a plurality of base station apparatuses each constituting a cell corresponding to a service area for providing a mobile communication service to a mobile terminal;
The mobile terminal residing in the cell of the first base station device is
Receiving radio signal for measurement from a plurality of other second base station apparatuses through radio channels for measuring radio field intensity and measuring radio field intensity;
Creating neighboring cell list information for the first base station apparatus according to the measurement result, and notifying the first base station apparatus;
The first base station apparatus notified of the neighboring cell list information from the mobile terminal,
Generating neighboring cell information as station data based on identification information of the second base station device included in the neighboring cell list information;
Autonomous generation method of neighboring cell information.

(Supplementary note 16) The autonomous generation method of peripheral cell information according to supplementary note 15, wherein the mobile terminal measures the radio field intensity of the measurement radio signal during control channel setting or standby.

(Supplementary Note 17) A method for autonomously generating neighboring cell information in a cellular mobile radio communication system including at least a plurality of base station apparatuses each constituting a cell corresponding to a service area for providing a mobile communication service to a mobile terminal;
The mobile terminal residing in the cell of the first base station device is
Receiving a radio signal through a signaling channel from a plurality of other second base station devices to detect a modulation code;
Notifying the first base station apparatus of the list information of the detected modulation codes;
The first base station apparatus notified of the modulation code list information from the mobile terminal,
Converting the modulation code list information into identification information of the second base station apparatus to generate neighboring cell information as station data;
Autonomous generation method of neighboring cell information.

1 is a block diagram for explaining a configuration of a system according to an embodiment and a first operation example. FIG. The sequence chart for demonstrating the 1st operation example in the system of one embodiment. The figure for demonstrating the adjacency relationship of the some base station in the system of one Embodiment. The figure for demonstrating the allocation method of the radio channel for a radio field intensity measurement in the system of one embodiment. The figure for demonstrating the allocation method of the radio channel for a radio field intensity measurement in the system of one embodiment. The figure for demonstrating the allocation method of the radio channel for a radio field intensity measurement in the system of one embodiment. The block diagram for demonstrating the structure of the system of one Embodiment, and a 2nd operation example. The sequence chart for demonstrating the 2nd operation example in the system of one Embodiment. The block diagram for demonstrating the deformation | transformation of the structure of the system of one Embodiment, and a 2nd operation example. The sequence chart for demonstrating the deformation | transformation of the 2nd operation example in the system of one embodiment. The sequence chart for demonstrating the 3rd operation example in the system of one Embodiment. The sequence chart for demonstrating the 4th operation example in the system of one Embodiment. The block diagram for demonstrating the structure of the system of one Embodiment, and a 5th example of operation | movement. The sequence chart for demonstrating the 5th operation example in the system of one Embodiment. The sequence chart for demonstrating the 5th operation example in the system of one Embodiment. The figure for demonstrating the 6th operation example in the system of one Embodiment. The figure for demonstrating the 6th operation example in the system of one Embodiment. The figure for demonstrating the 6th operation example in the system of one Embodiment. The figure for demonstrating the 7th operation example in the system of one Embodiment. The block diagram for demonstrating the structure of the system of other embodiment, and the 9th operation example. The sequence chart for demonstrating the 9th operation example in the system of other embodiment. The sequence chart for demonstrating the 9th operation example in the system of other embodiment. The block diagram for demonstrating the 9th operation example in the system of other embodiment. The block diagram for demonstrating the structure of a system of another embodiment, and a 10th operation example. The sequence chart for demonstrating the 10th operation example in the system of another embodiment. The sequence chart for demonstrating the 10th operation example in the system of another embodiment. The sequence chart for demonstrating the 10th operation example in the system of another embodiment. The sequence chart for demonstrating the 10th operation example in the system of another embodiment. The block diagram for demonstrating the deformation | transformation structure of the system of another embodiment, and the 11th operation example.

Explanation of symbols

SYS cellular mobile radio communication system SA-A service area SA-B service area 1 own station 2a to 2f peripheral base station 3a to 3l quasi-peripheral base station

Claims (8)

A method for autonomously generating neighboring cell information in a cellular mobile radio communication system comprising at least a plurality of base station apparatuses each constituting a cell corresponding to a service area for providing a mobile communication service to a mobile terminal;
The first base station device of the plurality of base stations, transmits a measurement radio signal through a radio channel for radio field intensity measurement, wherein the first base station apparatus, the autonomous generation timing of the neighboring cell information The measurement signal including the identification information of the first base station device in the plurality of second base station devices of the plurality of base station devices without relaying the measurement radio signal to the mobile terminal. A radio signal for use ;
In order by each of the plurality of second base station devices,
Measuring the radio field intensity of the measurement radio signal including the identification information of the first base station apparatus received from the first base station apparatus ;
Determining whether the first base station apparatus recognized by the identification information is a neighboring cell according to the measured radio field intensity;
If the first base station apparatus is determined to be a neighboring cell, the identification information of the first base station apparatus is registered in the second station data of the neighboring cell possessed;
Obtaining first station data of neighboring cells held by the first base station device based on the identification information;
As peripheral cell information to the first station data of the peripheral cells acquired from the first base station apparatus, to reflect the second station data of neighbor cells for said owned;
Here, the plurality of base station devices function alternatively as the first base station device and the plurality of second base station devices . 2. The method for autonomously generating neighboring cell information according to claim 1, wherein the radio channel for measuring radio field intensity is predetermined according to a radio transmission method. Each of the second base station apparatuses determines that the first base station apparatus is not a neighboring cell, and the first base station apparatus registers as a neighboring cell in the second station data currently held If so, the neighboring cell information corresponding to the first base station device is deleted from the second station data.
The method for autonomously generating neighboring cell information according to claim 1. Further comprising at least one base station controller;
The neighboring cell information according to claim 1, wherein the base station control device instructs the first base station device to transmit the measurement radio signal when the autonomous generation timing of the neighboring cell information comes. Autonomous generation method. Further comprising at least one base station controller;
When there are a plurality of base station control devices, the first base station control device directly transmits the measurement radio signal to the subordinate first base station device when the neighboring cell information is autonomously generated. The second base station controller transfers the instruction to transmit the measurement radio signal from the first base station controller to the subordinate first base station apparatus . Autonomous generation method of neighboring cell information. 2. The autonomous generation method of peripheral cell information according to claim 1 , wherein auxiliary data for generating the peripheral cell information is generated using GPS geographical information . The autonomous generation of neighboring cell information according to claim 1 , wherein the neighboring cell information corresponding to the first base station device that is not geographically neighboring cells is excluded from the second station data using GPS geographic information. Method. A method of collecting information about the neighboring base station in a radio base station capable of receiving radio signals from the neighboring base station,
The radio base station is
When a wireless signal including identification information related to the neighboring base station is received from the neighboring base station, station data held by the neighboring base station specified based on the identification information is transmitted from the neighboring base station via wired communication. Acquired,
The station data acquired via the wired communication is stored in association with the identification information acquired from the wireless signal received from the neighboring base station,
A method characterized by that.

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