JP4755279B2 - Base station, mobile station, and wireless communication method - Google Patents

Description

  The present invention relates to a base station, a mobile station, and a radio communication method, and more particularly to a base station, a mobile station, and a radio communication method for measuring reception quality of neighboring base stations.

  For mobile communication systems such as mobile phones, the third generation system based on the CDMA (Code Division Multiple Access) system is currently in service, but studies on next-generation mobile communication systems that enable higher-speed communication are actively conducted. Has been considered. In 3GPP (3rd Generation Partnership Project), examination is performed as LTE (Long Term Evolution) (for example, refer nonpatent literature 1).

  In a cellular mobile communication system, handover is performed as the mobile station in communication moves. The destination base station by the handover is determined by the mobile station measuring the reception quality of the neighboring base stations and notifying the result to the network side.

  In order to measure the reception quality of the neighboring base stations, the mobile station obtains information on neighboring base stations (neighboring base station information) from the currently communicating base station. The peripheral base station information includes information such as the center frequency of the transmission band of each base station, the information of the pilot signal code, and the transmission timing difference of the pilot signal between the base stations. The neighboring base station information is transmitted using a broadcast channel (BCH: Broadcast Channel) or a dedicated channel (DCH: Dedicated Channel).

  FIG. 11 is a diagram illustrating an example of an information configuration of neighboring base station information. The peripheral base station information is collected for each base station. For example, the peripheral base station information is collected for each of the base stations BS1, BS2,..., BSn as shown in the figure, and includes specific peripheral base station information such as the center frequency, code, and time difference. The frequency shown in the figure indicates the center frequency of the transmission band of the base stations BS1, BS2,..., BSn. The code indicates a code of a pilot signal transmitted by the base stations BS1, BS2,. The time difference indicates a transmission timing difference between pilot signals transmitted from the base stations BS1, BS2,..., BSn to the mobile station.

  The mobile station receives the neighboring base station information from the currently communicating base station. The mobile station receives the pilot signal of the neighboring base station based on the received neighboring base station information. Then, the reception quality of the neighboring base stations is measured based on the received pilot signal, and the result is notified to the network side. Since the peripheral base station information is transmitted for each base station BS1, BS2,..., BSn as shown in the figure, the mobile station stores all the peripheral base station information of the base stations BS1, BS2,. After reception, the reception quality of the neighboring base stations is measured.

By the way, in LTE, handover is performed not only for LTE systems but also for W-CDMA (Wide-CDMA) and GSM (Global System for Mobile) systems (see, for example, Non-Patent Document 2). Therefore, the peripheral base station information needs to include the peripheral base station information of the W-CDMA and GSM base stations in addition to the LTE system base station. As a result, in the LTE system, it is considered that the information amount of the neighboring base station information is increased as compared with the current communication system.
3rd Generation Partnership Project, "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access (E-UTRAN); Overall description; Stage 2 (Release 8)", 3GPP TS36.300, 2006-11, V0. 3.0. 3rd Generation Partnership Project, "Feasibility study for evolved UTRA and UTRAN (Release 8)", 3GPP TR25.912, 2006-6, V0.1.6.

  However, since the neighboring base station information is classified for each base station as described above, in order for the mobile station to measure the reception quality based on the neighboring base station information, reception of all neighboring base station information is completed. Must. For this reason, if the number of neighboring base stations increases, the amount of neighboring base station information increases, and it takes time to receive information on the mobile station side, resulting in a delay in handover and an increase in power consumption. .

The present invention has been made in view of such a point, and an object thereof is to reduce the amount of information of neighboring base station information to be notified to a mobile station.
It is another object of the present invention to make it possible to adjust the information amount of the neighboring base station information to be notified to the mobile station as necessary.

  In the present invention, in order to solve the above problem, in a base station that performs radio communication with a mobile station, first peripheral base station information related to a plurality of peripheral base stations, which is divided according to the type of information, Of the second peripheral base station information related to the peripheral base station, there is provided a base station characterized in that the base station has notification means capable of reporting the first peripheral base station information in a limited manner.

  According to such a base station, the first peripheral base station information classified according to the type of information and the second peripheral base station information are limited to the first peripheral base station information and notified. It becomes possible. Thereby, the amount of information of the neighboring base station information can be varied as necessary.

  Further, in the present invention, in order to solve the above problem, in a mobile station that performs radio communication with a base station, first peripheral base station information related to a plurality of peripheral base stations, which is classified according to the type of information, Of the second neighboring base station information related to a plurality of neighboring base stations, the receiving means for receiving information broadcasted restricted to the first neighboring base station information and the second neighboring base station information are included in the second neighboring base station information There is provided a mobile station comprising information request means for requesting the base station to transmit information.

  According to such a mobile station, it is possible to request the second neighboring base station information from the base station as necessary. As a result, the base station can notify the neighboring base station information as much as the mobile station needs.

ADVANTAGE OF THE INVENTION According to this invention, the information content of the periphery base station information alert | reported to a mobile station can be reduced.
Further, the information amount of the neighboring base station information notified to the mobile station can be adjusted as necessary.
These and other objects, features and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings which illustrate preferred embodiments by way of example of the present invention.

It is the figure which showed the outline | summary of the base station. It is a figure which shows the system configuration example of LTE. It is the figure which showed the information structural example of the periphery base station information. It is the figure which showed the specific information structural example of the periphery base station information. It is a flowchart which shows operation | movement of a base station. It is a flowchart which shows another operation | movement of a base station. It is a flowchart which shows operation | movement of a mobile station. It is a functional block diagram of a base station. It is another functional block diagram of a base station. It is a functional block diagram of a mobile station. It is the figure which showed the information structural example of the periphery base station information.

Hereinafter, the principle of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an outline of a base station. In the figure, a base station 1 and mobile stations 2a and 2b are shown. Further, in the figure, peripheral base station information 3 regarding the peripheral base station is shown. The base station 1 has information sorting means 1a and information notification means 1b.

  The information classification means 1a classifies the neighboring base station information 3 according to information types A, B,. The type A of the peripheral base station information 3 is, for example, the center frequency of the transmission band of the peripheral base station. The type B of the neighboring base station information 3 is a pilot signal code.

  BS1, BS2,..., BSn of the peripheral base station information 3 indicate information of each peripheral base station. The type A BS1 indicates, for example, the center frequency of the transmission band of the neighboring base station BS1. The type A BS2 indicates the center frequency of the transmission band of the neighboring base station BS2. Type B BS1 indicates the code of the pilot signal of the neighboring base station BS1. Type B BS2 indicates the code of the pilot signal of the neighboring base station BS2.

  The peripheral base station information 3 has an importance determined for each classified information. In the figure, the smaller the importance value, the higher the importance. In the above example, the information on the center frequency of the transmission band of the peripheral base station has the highest importance, and then the information on the pilot signal code becomes high.

  The information notifying means 1b notifies the neighboring base station information divided by types A, B,..., N to the mobile stations 2a and 2b in the area by a predetermined amount from the higher importance level. For example, the neighboring base station information 3 up to importance level 1 or importance level 2 is reported. For example, when notifying the neighboring base station information 3 up to the importance level 2, the information notifying means 1b will notify the neighboring base station information 3 of types A and B to the mobile stations 2a and 2b. The neighboring base station information is not notified to the mobile station at this stage. Therefore, information of importance levels 1 and 2 is notified as belonging to the first section, and information after importance level 3 is not notified as belonging to the second section (at least at this stage).

The mobile stations 2a and 2b receive the neighboring base station information 3, and measure the reception quality of the neighboring base stations based on the received neighboring base station information (types A and B).
Depending on the reception quality measurement capability, the mobile stations 2a and 2b may measure the reception quality of the neighboring base stations without receiving the neighboring base station information 3 of all types A, B,. it can. For example, it is possible to measure the reception quality only with information on the center frequency of the transmission band of the peripheral base station.

  Therefore, the base station 1 transmits the peripheral base station information 3 from the higher importance side as much as necessary, thereby providing the mobile station with the peripheral base station information 3 of all types A, B,. There is no need to notify.

  For example, in the neighboring base station information shown in FIG. 11, unless all base station information is reported, the mobile stations 2a and 2b cannot measure the reception quality even if the reception quality measurement capability is high. It was. 1 includes information on all base stations BS1, BS2,..., BSn in each of types A, B,. However, the mobile stations 2a and 2b can measure the reception quality depending on the reception quality measurement capability. In other words, in the configuration of the neighboring base station information 3 in FIG.

As described above, the base station 1 divides the neighboring base station information 3 into information types A, B,..., N, and notifies the mobile stations 2a and 2b by a predetermined amount from the higher importance level. did.
As a result, the information amount of the neighboring base station information 3 can be varied as necessary, and the neighboring base station information 3 can be transmitted to the mobile stations 2a and 2b as much as necessary from the higher importance level. , 2b, it is possible to reduce the information amount of the neighboring base station information 3.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 2 is a diagram illustrating an example of an LTE system configuration. In the figure, base stations 11 to 14 and a mobile station 21 which is a mobile phone, for example, are shown. The base station 11 and the mobile station 21 perform wireless communication based on, for example, an LTE communication system.

  It is assumed that the mobile station 21 belongs to the area of the base station 11 and performs radio communication with the base station 11. Accordingly, the mobile station 21 receives the neighboring base station information from the base station 11. When the mobile station 21 is in a standby state, the mobile station 21 receives neighboring base station information through a broadcast channel from the base station 11, and when in a communication state (calling state), the broadcast station or a dedicated channel (only a dedicated channel can be used). To receive neighboring base station information.

  The mobile station 21 measures the reception quality of the neighboring base station based on the neighboring base station information broadcast from the base station 11. For example, the mobile station 21 determines the base stations 11 to 14 based on the center frequency of the peripheral base stations (base stations 11 to 14) and the pilot signal codes of the base stations 11 to 14 included in the peripheral base station information. Measure the reception quality. Then, the mobile station 21 transmits the measured reception quality to the network side (base station 11).

  FIG. 3 is a diagram illustrating an example of an information structure of neighboring base station information. The base station classifies the neighboring base station information by, for example, the center frequency, the pilot signal code, the pilot signal transmission timing difference, and the information type, and arranges the classified information according to the importance. The base station stores the neighboring base station information of each base station (BS1, BS2,..., BSn) in the information arranged according to the importance. In the figure, the smaller the importance number, the higher the importance.

  The mobile station does not necessarily need all the neighboring base station information to measure the reception quality of the neighboring base station. Depending on the reception quality measurement capability of the mobile station, it may be possible to measure the reception quality of neighboring base stations using only the center frequency.

  Therefore, the base station transmits only peripheral base station information of a predetermined importance level to the mobile station in accordance with its own determination or a request from the mobile station. That is, as shown in FIG. 3, the neighboring base station information is classified according to type and arranged in order of importance, so that the neighboring base station information corresponding to the importance can be transmitted to the mobile station.

  For example, when it is determined that the base station information up to the importance level 1 is to be notified to the subordinate mobile stations, the base station reports the base station information of the importance level 1 to the subordinate mobile stations. When it is determined that the neighboring base station information up to importance level 2 is to be notified to the subordinate mobile stations, the neighboring base station information of importance level 1 and importance level 2 is reported to the subordinate mobile stations. Thus, the base station can suppress the information amount of the neighboring base station information notified to the mobile station by transmitting only necessary information according to the importance.

  When the neighboring base station information has a configuration as shown in FIG. 11, the mobile station cannot measure the reception quality unless it receives all the neighboring base station information as described above. This is because the peripheral base station information in all the peripheral base stations BS1, BS2,..., BSn cannot be obtained unless all the peripheral base station information is received.

  On the other hand, in the configuration shown in FIG. 3, even when only the importance level 1 is transmitted, the mobile station can receive the neighboring base station information of the importance level 1 in all the neighboring base stations BS1, BS2,. it can. Furthermore, it is possible to receive necessary types of neighboring base station information according to the importance.

The peripheral base station information includes information such as the center frequency, code, and time difference, but may further include communication quality information and provided service information.
The communication quality information is information relating to access restrictions on the mobile station to the base station. For example, it is information that only a mobile station having a certain radio wave intensity should access the base station. When there are many mobile stations in a base station area, a situation occurs in which no mobile station can enter the base station area. In this case, only a mobile station whose radio field intensity is indicated by the communication quality information is permitted to access the base station. Thus, the mobile station can recognize which peripheral base station it can access and which peripheral base station cannot be accessed, and only needs to measure the reception quality of the accessible peripheral base station.

  The provided service information is service information provided by the base station. For example, it is information that a certain base station provides only a voice service and a certain base station provides a voice service and a videophone service. As a result, the mobile station can recognize the neighboring base station that provides the service that it wants to receive, and only needs to measure the reception quality of the neighboring base station.

  In addition, immediately after the power is turned on, the mobile station measures the reception quality of the peripheral base station without receiving the peripheral base station information, so the peripheral base station information is not necessarily required. However, if the neighboring base station information necessary for reception quality measurement can be obtained, the mobile station can shorten the time required for reception quality measurement. Among the peripheral base station information, it is considered that the information having the highest effect is center frequency information. This is because the mobile station takes time when measuring the reception quality of the neighboring base stations while changing (searching) the center frequency. Next, it is considered that code information of pilot signals, transmission timing difference between base stations, communication quality information, and provided service information follow. That is, by receiving information that can most reduce the load of measurement processing of reception quality of neighboring base stations by receiving the mobile station, the priority is increased (importance 1), and the mobile station receives the information The priority of other information that reduces the load of the reception quality measurement processing of the base station is made low (importance 2 to n).

  FIG. 4 is a diagram illustrating a specific information configuration example of neighboring base station information. As shown in the figure, the neighboring base station information is divided for each type of information: frequency (center frequency), code (pilot signal code), time difference (pilot signal transmission timing difference), and so on. It is assumed that the importance is higher in the order of frequency, code, time difference,. Information on all the neighboring base stations BS1, BS2,..., BSn is stored in each of the sections.

  As a result, for example, when the base station reports peripheral base station information of importance 1 to the mobile station, the base station reports the center frequency information of all the peripheral base stations BS1, BS2,..., BSn to the mobile station. When the mobile station is notified of the peripheral base station information up to importance 2, the center frequency information of all the peripheral base stations BS1, BS2,..., BSn is first notified, and then all the peripheral base stations BS1, BS2,. The pilot signal code is reported to the mobile station.

Next, the operation of the base station will be described using a flowchart.
FIG. 5 is a flowchart showing the operation of the base station.
In step S1, the base station sets 1 to the variable i. The variable i corresponds to the importance of the neighboring base station information to be notified.

In step S2, the base station determines whether it is necessary to change the importance of the neighboring base station information notified to the mobile station.
For example, the base station determines whether it is necessary to change the importance of the neighboring base station information based on the magnitude of the radio transmission power. In order to reduce the amount of information of peripheral base station information to be transmitted when the radio transmission power has no surplus, the base station increases the information amount of peripheral base station information to be transmitted, and when the radio transmission power has no surplus It is. Note that, when the number of mobile stations in the area increases, the remaining power of the wireless transmission power decreases, and when the number of mobile stations in the area decreases, the remaining power of the wireless transmission power increases.

  If the base station determines that the importance of the neighboring base station information needs to be changed, the base station proceeds to step S3. If it is determined that there is no need to change the importance of the neighboring base station information, the process proceeds to step S4.

  In step S3, the base station sets a variable i. For example, the variable i is set according to the remaining wireless transmission power. Specifically, when the radio transmission power has a surplus, the value of the variable i is set to a large value, and when the radio transmission power has no surplus, the value of the variable i is set to a small value. .

  In step S4, the base station broadcasts neighboring base station information to each mobile station based on the variable i. For example, when the variable i is 1, in the example of FIG. 4, the base station information of the frequency is notified to the mobile station. When the variable i is 3, in the example of FIG. 4, the base station information of the frequency, code, and time difference is reported to the mobile station.

In this way, the base station determines neighboring base station information to be broadcast based on its own determination. Thereby, it is possible to reduce the neighboring base station information notified to the mobile station.
Although the determination in step S2 is performed by the base station, it may be performed by a host device (for example, RNC (Radio Network Controller)) of the base station.

  Next, another operation of the base station will be described using a flowchart. In FIG. 5, the importance of surrounding base station information to be reported by the base station is determined. On the other hand, in the following flowchart, the base station informs the mobile station of neighboring base station information having an importance level according to a request from the mobile station.

FIG. 6 is a flowchart showing another operation of the base station.
In step S11, the base station sets 1 to the variable i. The variable i corresponds to the importance of the neighboring base station information to be notified.

  In step S12, the base station determines whether or not there is a request for changing the importance of the neighboring base station information to be notified from the mobile station. If there is a request for changing the importance of the neighboring base station information to be notified from the mobile station, the process proceeds to step S13. If there is no request for changing the importance of the neighboring base station information to be notified from the mobile station, the process proceeds to step S14.

In step S13, the base station sets the variable i to a value requested from the mobile station.
In step S14, the base station broadcasts neighboring base station information to each mobile station based on the variable i. For example, when the variable i is 1, in the example of FIG. 4, the base station information of the frequency is notified to the mobile station. When the variable i is 3, in the example of FIG. 4, the base station information of the frequency, code, and time difference is reported to the mobile station.

  In this way, the base station determines neighboring base station information of the importance level to be notified in response to a request from the mobile station. Thereby, it is possible to reduce the neighboring base station information notified to the mobile station as necessary.

  Even if the base station changes the importance level in response to the importance level change request from the mobile station, if the operation of the flowchart shown in FIG. It is.

Next, the mobile station importance change request described in step S12 will be described.
FIG. 7 is a flowchart showing the operation of the mobile station.
In step S21, the mobile station receives neighboring base station information from the base station.

  In step S22, the mobile station determines whether or not information necessary for reception quality measurement is included. For example, the mobile station determines whether or not information necessary for measurement of reception quality is included according to its own reception quality measurement capability. Specifically, the mobile station makes a determination according to the capacity of its own memory and hardware capabilities such as a CPU (Central Processing Unit).

  When the received neighboring base station information includes information necessary for reception quality measurement, the mobile station proceeds to step S24. If the received neighboring base station information does not include information necessary for reception quality, the process proceeds to step S23.

  In step S23, the mobile station requests peripheral base station information of importance necessary for the base station. For example, if the mobile station's reception quality measurement capability is low, the mobile station requests the base station to broadcast up to less important base station information.

In step S24, the mobile station measures the reception quality of the neighboring base station using the received neighboring base station information.
In addition, since the neighboring base station information is reported to all mobile stations in the area by the base station, if one mobile station requests a neighboring base station having a low importance level, the neighboring base station information is also sent to other mobile stations. Station information will be notified.

  In this way, the mobile station side requests the base station for neighboring base station information necessary for reception quality measurement. In response to a request from the mobile station, the base station informs the mobile station of neighboring base station information having a predetermined importance. Thereby, the base station can reduce the neighboring base station information notified to the mobile station.

  When the mobile station receives the peripheral base station information via the dedicated channel during communication, the peripheral base station information can be transmitted only to the mobile station according to a request from the mobile station. For example, after transmitting only information of importance 1 among neighboring base station information to the mobile station via the dedicated channel, if a signal requesting transmission of importance 2 or 3 is received from the mobile station, the base station It is also possible to transmit transmissions of importance 2 and 3 as peripheral base station information to the mobile station via dedicated channels.

Next, the function of the base station will be described.
FIG. 8 is a functional block diagram of the base station. The functional block diagram of the base station in the figure corresponds to the operation of the flowchart in FIG. 5, and shows the function when the base station itself determines whether or not to change the importance of the neighboring base station information. ing.

As shown in the figure, the base station includes a neighboring base station information setting unit 31, a broadcast information generation unit 32, a transmitter 33, and a receiver 34.
Control information is input to the peripheral base station information setting unit 31. The control information includes information for controlling wireless communication, and includes, for example, information such as handover instruction information and neighboring base station information.

  The neighboring base station information setting unit 31 outputs only the neighboring base station information having the necessary importance to the broadcast information generating unit 32 among the neighboring base station information included in the control information. For example, the importance level of the neighboring base station information is determined according to the remaining power of the radio transmission power, and only the neighboring base station information having the necessary importance level is output to the broadcast information generating unit 32.

  The broadcast information generating unit 32 generates neighboring base station information to be notified to the mobile station. For example, the broadcast information generation unit 32 generates peripheral base station information based on the peripheral base station information output from the peripheral base station information setting unit 31.

  The transmitter 33 receives peripheral base station information and user-specific data output from the broadcast information generation unit 32. The transmitter 33 notifies neighboring base station information to mobile stations in the area, and transmits user-specific data to the mobile station.

The receiver 34 outputs the control information and data received via the antenna to a subsequent processing circuit.
Next, another function of the base station will be described.

  FIG. 9 is another functional block diagram of the base station. The functional block diagram of the base station in the figure corresponds to the operation of the flowchart in FIG. 6 and shows the function when the importance of the neighboring base station information is changed according to the request of the mobile station.

As shown in the figure, the base station includes a neighboring base station information setting unit 41, a broadcast information generation unit 42, a transmitter 43, and a receiver 44.
Control information output from the receiver 44 is input to the peripheral base station information setting unit 41. The control information includes information for controlling wireless communication, and includes information such as the measurement result of reception quality and the importance of neighboring base station information requested by the mobile station.

The neighboring base station information setting unit 41 extracts the importance of the neighboring base station information requested by the mobile station included in the control information, and outputs it to the broadcast information generating unit 42.
The broadcast information generation unit 42 generates peripheral base station information to be notified to the mobile station based on the importance level output from the peripheral base station information setting unit 41. For example, as shown in FIG. 4, the frequency and code neighboring base station information is generated based on the importance.

  The transmitter 43 receives peripheral base station information and user-specific data output from the broadcast information generation unit 42. The transmitter 43 notifies neighboring base station information to mobile stations in the area, and transmits user-specific data to the mobile station.

The receiver 44 outputs the control information and data received via the antenna to a subsequent processing circuit.
Note that the base station may have the functions of both FIG. 8 and FIG. That is, the base station may determine the importance of the neighboring base station information by itself and may change it according to the request of the mobile station.

Next, functions of the mobile station will be described.
FIG. 10 is a functional block diagram of the mobile station. As shown in the figure, the mobile station includes a neighboring base station measurement unit 51, an information notification request unit 52, a control unit 53, a data processing unit 54, a receiver 55, and a transmitter 56.

  The peripheral base station measurement unit 51 measures the reception quality of the peripheral base station based on the peripheral base station information output from the receiver 55. For example, when the neighboring base station information of the center frequency and code of the transmission band of each base station is received, the reception quality of the neighboring base station is measured based on the received center frequency and code.

  When the neighboring base station information received by the neighboring base station measuring unit 51 does not include neighboring base station information necessary for reception quality measurement, the information reporting requesting unit 52 makes a request for reporting necessary information. The notification request is output to the transmitter 56 and wirelessly transmitted to the base station.

The control unit 53 controls wireless communication based on the control information received by the receiver 55. Also, control information for controlling wireless communication is output to the transmitter 56.
The data processing unit 54 processes data received by the receiver 55. In addition, data to be wirelessly transmitted to the base station is output to the transmitter 56.

The receiver 55 outputs the control information and data received via the antenna to the neighboring base station measurement unit 51, the control unit 53, and the data processing unit 54.
The transmitter 56 wirelessly transmits the control information and data output from the information notification request unit 52, the control unit 53, and the data processing unit 54 to the base station via the antenna.

  In this way, the base station classifies the neighboring base station information for each type of information, and notifies the mobile station of a predetermined amount from the higher importance level. As a result, the information amount of the neighboring base station information can be varied as necessary, and the information from the higher importance can be transmitted to the mobile station as much as necessary, so the information amount of the neighboring base station information can be reduced. It becomes.

  In addition, the mobile station requests the base station for neighboring base station information necessary for measuring the reception quality of the neighboring base station. As a result, the base station can report the neighboring base station information as much as the mobile station needs, so that the information amount of the neighboring base station information can be reduced.

In addition, reducing the amount of information of the neighboring base station information leads to a reduction in the reception time of the mobile station, and it is possible to suppress a handover delay and an increase in power consumption.
The above merely illustrates the principle of the present invention. In addition, many modifications and changes can be made by those skilled in the art, and the present invention is not limited to the precise configuration and application shown and described above, and all corresponding modifications and equivalents may be And the equivalents thereof are considered to be within the scope of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base station 1a Information division means 1b Information alerting means 2a, 2b Mobile station 3 Neighboring base station information

Claims (10)

In a base station that performs radio communication with a mobile station,
Of the neighboring base station information including a plurality of types of information related to each of a plurality of neighboring base stations, classified according to the type of information, the base station determines the control information that needs to be reported according to the type of information. The mobile station determines according to the type of information that the first peripheral base station information regarding the plurality of peripheral base stations and the control information that needs to be acquired from the peripheral base station information are determined. Informing means for informing the second neighboring base station information regarding the plurality of neighboring base stations ,
A base station characterized by comprising: The notification means, a base station according to claim 1, wherein the information to be included in the first neighboring base station information, Ru increases the more the wireless transmission power of available capacity of the base station. The notification means in accordance with a request from the mobile station, before SL by adjusting the information to be included in the second neighbor base station information, claim 1, characterized in that to generate the second neighbor base station information to be notified Or the base station of 2 . The types of information include the center frequency of the transmission band of the peripheral base station, the code of the pilot signal of the peripheral base station, the transmission timing of the pilot signal of the peripheral base station, the communication quality information of the peripheral base station , and the provision of the peripheral base station The base station according to any one of claims 1 to 3 , wherein at least one of service information is included. In a mobile station that performs radio communication with a base station,
  Of the neighboring base station information including a plurality of types of information related to each of a plurality of neighboring base stations, classified according to the type of information, the base station determines the control information that needs to be reported according to the type of information. The mobile station determines according to the type of information that the first peripheral base station information regarding the plurality of peripheral base stations and the control information that needs to be acquired from the peripheral base station information are determined. Receiving means for receiving notification of second neighboring base station information regarding the plurality of neighboring base stations,
  A mobile station characterized by comprising: Before distichum side base station information, the mobile station according to claim 5, characterized in that it comprises a relief information capable load measurement processing of the reception quality of neighboring base stations in the mobile station. The control information that needs to be acquired is determined according to the type of information, information to be included in the second neighboring base station information is selected from the neighboring base station information, and the second neighboring base station information is Information request means for requesting to the base station,
  The mobile station according to claim 5 or 6, characterized by comprising: The information requesting means determines the control information that needs to be acquired based on the measurement processing capability of the reception quality of the neighboring base station in the mobile station, and determines the second neighboring base station information from the neighboring base station information. 8. The mobile station according to claim 7, wherein information to be included in is selected. In a wireless communication method of a base station that performs wireless communication with a mobile station,
  From the neighboring base station information that includes a plurality of types of information related to each of a plurality of neighboring base stations, which is divided for each type of information, control information that needs to be notified according to the type of information is determined, and the plurality Select the information to be included in the first neighboring base station information regarding the neighboring base stations of
  Among the first neighboring base station information and the neighboring base station information, the mobile station determines whether the control information needs to be acquired according to the type of information. 2 neighboring base station information,
  A wireless communication method for a base station. In a wireless communication method of a mobile station that performs wireless communication with a base station,
  The control information that needs to be acquired according to the type of information is determined from the peripheral base station information that includes a plurality of types of information related to each of the plurality of peripheral base stations, and is divided according to the type of information. Select the information to be included in the second neighboring base station information regarding the neighboring base stations of
  Of the plurality of neighboring base stations, the second neighboring base station and the plurality of neighboring base stations are determined by the base station according to the type of information as control information that needs to be notified among the neighboring base station information. Receiving notifications of neighboring base station information and
  A wireless communication method for a mobile station.

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