CN101663831B - Mobile communication system, base station device and control method thereof - Google Patents

Abstract

A base station (12) includes: an interference signal detection unit (34) for detecting an interference signal which interferers a channel used for communication with a terminal station according to a reception signal; an interference channel information generation unit (36) for generating interference channel information which indicates a channel of the interference signal; and an interference channel information transmission control unit (38) for successively transmitting interference channel information to a base station (12) in the proximity until power of the interference signal detected by the interference signal detection unit (34) is reduced. Furthermore, the base station (12) includes: an interference channel information acquisition unit (40) which acquires interference channel information and judges whether the interference channel information is destined to the local station; a use channel judgment unit (42) which judges whether a channel indicated by the interference channel information destined to the local station is being used; a channel allocation unit (44) which modifies channel allocation.

Description

Mobile communication system, base station device and control method thereof

technical field

The present invention relates to a mobile communication system, a base station device, and a control method thereof, and in particular to a technique for reducing radio wave interference from a terminal station communicating with an adjacent base station (hereinafter referred to as "adjacent base station").

Background technique

In a mobile terminal system using a cell system, by installing a plurality of base stations that limit the reach of radio waves to a certain range, the same frequency can be repeatedly used between base stations. Therefore, each base station sometimes receives radio wave interference from terminal stations communicating with its neighboring base stations.

Specifically, in the mobile communication system 70 shown in FIG. In the area where the cells 76-1 and 76-2 of the two base stations overlap, radio waves transmitted from the terminal station 74-6 may reach not only the base station 72-2 but also the base station 72-1. Here, if the mobile communication system 70 adopts OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access), the received signal spectrum of the base station 72-1 is as shown in FIG. 9, for example. As shown in the figure, the radio wave transmitted from the terminal station 74-6 which is not carrier-synchronized with the base station 72-1 destroys the radio waves among the received waves from the terminal stations 74-1 to 74-5 communicating with the base station 72-1. Orthogonality of each subcarrier. In this way, the base station 72-1 cannot accurately demodulate the received signals from the base stations 74-1 to 74-5 through Fast Fourier Transform (FFT). FIG. 10 is a diagram showing the demodulation constellation of the base station 72-1 in this case. As shown in the figure, due to the interference from the terminal station 74-6, EVM (Error Vector Magnitude, error vector magnitude) is terminal station 74-3<terminal station 74-4<terminal station 74-1<terminal station

As a countermeasure to this radio wave interference, for example, Patent Document 1 discloses a wireless communication system that separately uses OFDM for realizing high-speed transmission and detection of interference signals in units of time slots according to the propagation state and communication environment. MC-CDMA with high immunity to interference, thus realizing the improvement of communication capacity.

[Patent Document 1] Japanese Patent Laid-Open No. 2004-158901

However, in the technology described in Patent Document 1 and other technologies (for example, adaptive antenna array technology), even if degradation of communication quality can be prevented by avoiding radio wave interference, generation of radio wave interference itself cannot be suppressed.

Contents of the invention

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a mobile communication system, a base station apparatus, and a control method thereof capable of reducing radio wave interference from a terminal station communicating with an adjacent base station.

In order to solve the above-mentioned problems, the present invention relates to a mobile communication system including a plurality of base station devices communicating with terminal station devices in its own cell, wherein the mobile communication system is characterized in that each of the base station devices includes an interference signal a detection unit that detects an interference signal that interferes with a channel used for communication with the terminal station apparatus from a received signal; and an interference channel information transmission unit that indicates the interference signal detected by the interference signal detection unit The interference channel information of the channel is transmitted to adjacent base station apparatuses (neighboring base station apparatuses) in sequence until the power of the interference signal decreases, and the base station apparatus that receives the interference channel information destined for the own station is using the interference channel In the case of the channel indicated by the information, the assignment of the channel is changed.

According to the present invention, the base station apparatus detects an interference signal that interferes with a channel used for communication from a received signal. Then, the interference channel information indicating the channel of the interference signal is sequentially notified to adjacent base station apparatuses through a wired line or a wireless line until the power of the detected interference signal decreases. On the other hand, the base station apparatus that has received the interference channel information changes the allocation of the channel when the received interference channel information is intended for its own station and the channel indicated by the interference channel information is being used. Therefore, the base station apparatus can reduce the radio wave interference from the terminal station apparatus communicating with the adjacent base station apparatus without determining the direction of arrival of the interfering wave.

Furthermore, in one embodiment of the present invention, the interference channel information transmission unit transmits the interference channel information at a predetermined timing for identifying a base station apparatus as a transmission destination, and the base station receiving the interference channel information The device recognizes whether or not the interference channel information is destined for its own station based on the reception timing of the interference channel information. According to this aspect, only the base station apparatus corresponding to the transmission timing of the interference channel information changes the allocation of the channel indicated by the interference channel information. Therefore, the base station apparatus can reduce radio wave interference from terminal station apparatuses communicating with the adjacent base station apparatus while preventing the number of channel changes from increasing due to the proximity of the base station apparatus.

In this method, each of the base station devices communicates with the terminal station device by a time division duplex method, and the predetermined timing may be a predetermined reception frame based on time division duplex. In this way, the base station device does not need to design a special circuit for receiving interference channel information.

Furthermore, in one aspect of the present invention, the interference channel information transmission unit transmits the interference channel information including base station identification information for identifying a base station device as a transmission destination, and receives the interference channel information. The base station apparatus of the channel information identifies whether or not the interference channel information is destined for the own station based on the base station identification information included in the interference channel information.

In this aspect, each of the base station devices further includes an interference reduction performance information storage unit that stores interference reduction performance information for each of the adjacent base station devices, and the interference reduction performance information indicates the next After the interference channel information is sent to the base station device, the number of times the power of the interference signal related to the channel indicated by the interference channel information is reduced, the interference channel information sending unit may be stored in the interference reduction performance information storage unit The order of transmission to the base station apparatus that is the transmission destination of the interference channel information is determined based on the interference reduction performance information in the channel. In this way, the base station apparatus can preferentially transmit interference channel information to adjacent base station apparatuses whose terminal station apparatuses in the cell are likely to become interference sources. Therefore, it is possible to reduce radio wave interference from a terminal station apparatus communicating with an adjacent base station apparatus while preventing an increase in the number of channel changes due to the adjacent base station apparatus.

Furthermore, in one aspect of the present invention, each of the base station apparatuses wirelessly communicates with the terminal station apparatus by an orthogonal frequency division multiple access method and a time division multiplexing duplex method, and the base station apparatus used for communicating with the terminal station apparatus The channel is determined by a subcarrier frequency based on orthogonal frequency division and a time slot based on time division multiplexing. According to this method, in the mobile communication system employing the OFDMA method and the TDM method, the base station device can reduce the radio wave from the terminal station device communicating with the adjacent base station device without determining the direction of arrival of the interference wave. interference.

In addition, the present invention relates to a base station device that communicates with a terminal station device in its own cell, and is characterized in that the base station device includes: an interference signal detection unit that detects an interference signal that interferes with the terminal station device based on a received signal. An interference signal that interferes with the channel used by the device for communication; and an interference channel information sending unit that sequentially transmits interference channel information representing a channel of the interference signal detected by the interference signal detection unit to adjacent base station devices until the until the power of the interfering signal decreases.

Furthermore, the present invention relates to a base station device that communicates with a terminal station device in its own cell, wherein the base station device includes: an interference channel information receiving unit that receives interference channel information from other base station devices, the interference channel information The channel information indicates a channel of an interference signal that interferes with communication of the other base station apparatus; and a channel assignment unit that receives the interference channel information at the interference channel information receiving unit that is destined for its own station and is using the When interfering with the channel indicated by the channel information, the allocation of the channel is changed.

Furthermore, the present invention relates to a control method of a base station device that communicates with a terminal station device in its own cell, the control method is characterized in that it includes the following steps: a step of detecting an interference signal based on a received signal generating an interference signal that interferes with a channel used for communication with the terminal station apparatus; and an interference channel information transmitting step of sequentially transmitting interference channel information indicating a channel of the interference signal detected in the interference signal detecting step to adjacent base station devices until the power of the interfering signal decreases.

Furthermore, the present invention relates to a control method of a base station device that communicates with a terminal station device in its own cell, the control method is characterized in that it includes the steps of: receiving interference channel information, and receiving information from another base station device receiving interference channel information, the interference channel information indicating the channel of the interference signal that interferes with the communication of the other base station device; and a channel allocation step, when the interference channel information received in the interference channel information receiving step is based on the own station If the destination is not the destination and the channel indicated by the interference channel information is being used, the allocation of the channel is changed.

Description of drawings

FIG. 1 is an overall configuration diagram of a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a channel configuration according to the embodiment of the present invention.

FIG. 3 is a block diagram of a base station according to an embodiment of the present invention.

FIG. 4 is an example of a frame structure showing allocation of frames used when transmitting interference channel information.

FIG. 5 is a flowchart showing processing related to transmission of interference channel information in a base station.

FIG. 6 is a flowchart showing processing related to reception of interference channel information in a base station.

FIG. 7 is a diagram showing an example of a storage unit that stores interference reduction performance information.

Fig. 8 is an overall configuration diagram of the mobile communication system.

FIG. 9 is a diagram showing an example of a received signal spectrum in a base station at the time of radio wave interference.

FIG. 10 is a diagram showing an example of a demodulation constellation in a base station at the time of radio wave interference.

Detailed ways

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall configuration diagram of a mobile communication system 10 according to an embodiment of the present invention. As shown in the figure, the mobile communication system 10 is configured to include a plurality of base stations 12 (only base stations 12-1 to 12-7 are shown here) and a plurality of terminal stations 14 (not shown). The terminal station 14 is, for example, a portable mobile phone, a portable information terminal, or a data communication credit card.

As shown in FIG. 1, each base station 12 is arranged so that the end (cell edge) of a cell 16 representing a communication coverage area coincides with the end of its adjacent cell. For example, the cell 16-1 of the base station 12-1 has areas overlapping the cells 16-2 to 16-7 of its adjacent base stations 12-2 to 12-7, respectively. In addition, each base station 12 transmits and receives wireless signals with the terminal station 14 located in its own cell by means of TDD (Time Division Duplex, time division duplex). Multiplex communication with TDMA (Time Division Multiple Access, Time Division Multiple Access).

FIG. 2 is a diagram showing an example of a channel configuration in the mobile communication system 10 . RX and TX in the figure represent a reception frame and a transmission frame of the base station 12, respectively, and each frame is composed of a plurality of time slots (here, 4 time slots) based on time division multiplexing. Also, a plurality of subchannels (here, 10 subchannels) constituted by a plurality of subcarriers (for example, 16 subcarriers) based on OFDM are defined for each slot. Also, the channel used for each communication is specified by a combination of a slot number (Slot1 to 4) for identifying a slot and a subchannel number (f1 to f10) for identifying a subchannel frequency. In the mobile communication system 10, by using each channel determined in this way for each base station 12, reuse of the same frequency is realized. In addition, "ICH" shown in this figure will be described later.

Also, each base station 12 detects an interference signal that interferes with a channel used for communication with the terminal station 14 in its own cell, based on the received signal. And, the interference channel information indicating the channel of the interference signal is sequentially transmitted to the adjacent base station 12 until the power of the detected interference signal decreases. On the other hand, when the base station 12 that has received the interference channel information from the neighboring base station 12 is intended for its own station and is using the channel indicated by the interference channel information, it changes the channel. channel allocation. In this way, in the mobile communication system 10, the base station 12 that detected the interference signal can reduce the radio wave interference from the terminal station 14 communicating with the adjacent base station 12 without determining the direction of arrival of the interference wave.

Hereinafter, the configuration and functions of the base station 12 will be described in more detail in order to realize the above processing.

FIG. 3 is a block diagram of base station 12 . As shown in the figure, the base station 12 is configured to include an antenna 20 , a switching unit 22 , a receiving unit 24 , a transmitting unit 26 , a signal processing unit 28 , an I/F unit 30 , and a control unit 32 .

The antenna 20 transmits a wireless signal supplied from the transmitting unit 26 , receives a wireless signal transmitted from the terminal station 14 or the adjacent base station 12 , and outputs the received wireless signal to the receiving unit 24 .

The switching unit 22 switches transmission and reception of the antenna 20 in a time-divisional manner. Specifically, the connection destination of the antenna 20 is switched to the receiving unit 24 or the transmitting unit 26 so that the wireless signal is received in the reception frame (RX) and the wireless signal is transmitted in the transmission frame (TX). However, it is not limited to this when transmitting interference channel information described later in a reception frame.

The receiving unit 24 down-converts the wireless signal received by the antenna 20 into a baseband signal, and outputs it to the signal processing unit 28 .

The transmission unit 26 up-converts the baseband signal input from the signal processing unit 28 into a radio signal, amplifies it to a transmission output level, and supplies it to the antenna 20 .

The signal processing unit 28 extracts data transmitted from the terminal station 14 or the adjacent base station 12 from the baseband signal input from the receiving unit 24 . Specifically, symbol (symbol) synchronization, guard interval (Guard Interval) removal, conversion to digital signals, etc. are performed on the baseband signal input by the receiving unit 24, and the obtained digital signal is further passed through a high-speed Fourier transform. Transformation (FFT) transforms into a complex symbol sequence representing the phase and amplitude of each subcarrier. Then, the complex symbol sequence is converted into corresponding binary data by demapping processing corresponding to the modulation method, and the data transmitted from the terminal station 14 or the adjacent base station 12 is acquired. The data thus extracted is output to the I/F section 30 or the control section 32 .

Furthermore, the signal processing unit 28 converts the data input from the I/F unit 30 or the control unit 32 into a baseband signal. Specifically, the binary data input from the I/F unit 30 or the control unit 32 is converted into a complex symbol sequence indicating the phase and amplitude of each subcarrier by mapping processing corresponding to the modulation method. Then, the complex symbol sequence is converted into a digital signal by Inverse Fast Fourier Transform (IFFT), and then converted to an analog signal, added with a guard interval, etc., to obtain a baseband signal. The baseband signal obtained in this way is supplied to the transmission unit 26 .

The I/F unit 30 outputs data input from a high-level device (not shown) to the signal processing unit 28 , and outputs data input from the signal processing unit 28 to the high-level device.

The control unit 32 is composed of a CPU, a memory, and the like, and controls each unit of the base station 12 . Furthermore, as a functional configuration related to transmission of interference channel information described later, an interference signal detection unit 34, an interference channel information generation unit 36, and an interference channel information transmission control unit 38 are provided, and as a functional configuration related to reception of interference channel information , including an interference channel information acquisition unit 40 , a used channel determination unit 42 , and a channel allocation unit 44 . These functions are realized by the CPU executing various control programs stored in the memory.

The interference signal detection unit 34 detects interference that interferes with the channel used for communication with the terminal station 14 in its own cell according to a predetermined algorithm based on the received signal (here, each carrier component of the complex symbol input from the signal processing unit 28). Signal. Algorithms for detecting interfering signals may apply, for example, zero-forcing equalization and other equalization techniques.

When the interference signal detection unit 34 detects an interference signal, the interference channel information generation unit 36 generates interference channel information including a slot number and a subchannel number for identifying the channel of the interference signal.

The interference channel information transmission control unit 38 controls the signal processing unit 28 so that the interference channel information generated by the interference channel information generation unit 36 is sequentially transmitted to the adjacent base station 12 according to the frame (timing) allocated to the own station until the interference signal detection unit 34 until the power of the detected interfering signal decreases. Specifically, the signal processing unit 28 is controlled so that the interference channel information is transmitted at the following timing.

FIG. 4 is an example of a frame structure showing allocation of frames used when transmitting interference channel information. Here, in the case where the mobile communication system 10 has a cell structure in which six adjacent base stations 12 are installed around a certain base station 12 (see FIG. 1 ), an example in which frames are allocated so that they are adjacent to each other is shown. Each of the seven base stations 12 can transmit interference channel information in seven frames (see the lower part of FIG. 4 ). That is, when base station 12-1 transmits interference channel information in frame 1, base station 12-2 transmits interference channel information in frame 2, ..., base station 12-7 transmits interference channel information in frame 7, depending on the transmission source, predetermined The transmission timing of channel information is disturbed. According to this frame structure, the interference channel information transmission control unit 38 controls the transmission timing of the interference channel information, so that the neighboring base stations 12 cannot transmit the interference channel information at the same timing.

In addition, in the frame structure example shown in this figure, the above-mentioned 7 frames are regarded as 1 superframe, and 7 superframes are regarded as 1 superframe group, and it can be identified from the superframe (timing) of transmitting (receiving) interference channel information The transmission destination of the interference channel information (refer to the upper part of FIG. 4 ). That is, when super frame 1 is used to transmit interference channel information destined for base station 12-1, super frame 2 is used to transmit interference channel information destined for base station 12-2, ..., super frame 7 is used to transmit interference channel information destined for base station 12-1 When 7 is the destination interference channel information, the transmission timing of the interference channel information is predetermined according to the transmission destination. According to this super frame structure, the interference channel information transmission control unit 38 controls the transmission timing of the interference channel information, so that the interference channel information does not need to include information indicating the transmission destination, and the interference channel information is sequentially transmitted at predetermined intervals (every 7 frames). The channel information is sent to neighboring base stations 12 .

In addition, the interference channel information transmission control unit 38 can also control the signal processing unit 28 and the switching unit 22, so that in the frame allocated to the own station, as shown in FIG. Slot3) of RX of ICH to send interference channel information. In this way, when a base station 12 transmits interference channel information, each base station 12 does not need to design a special circuit for receiving interference channel information because its adjacent base stations 12 are in the receiving mode of interference channel information.

In addition, in the frame structure example of FIG. 4 , the transmission destination of the interference channel information is specified for each super frame, and the transmission source of the interference channel information is specified for each frame in the super frame. The transmission source of the interference channel information is specified for each super frame, and the transmission destination of the interference channel information is specified for each frame in the super frame.

The interference channel information acquiring unit 40 acquires the interference channel information transmitted by any adjacent base station 12 and its receiving timing from the signal processing unit 28, and identifies whether the acquired interference channel information is destined for the own station based on the receiving timing. . Specifically, it is determined which super frame in the channel structure shown in FIG. 4 the receiving timing belongs to. station as the destination.

When the interference channel information acquired by the interference channel information acquisition unit 40 is destined for the own station, the use channel determination unit 42 determines whether the own station uses the channel specified by the time slot number and the subchannel number included in the interference channel information. channel.

The channel allocation unit 44 changes the allocation of the channel when it is determined by the used channel determination unit 42 that the own station is using the channel indicated by the interference channel information. For example, other vacant channels are allocated to communication using the channel indicated by the interference channel information, or the channel indicated by the interference channel information is allocated to communication with other terminal stations 14, or the channel indicated by the interference channel information is temporarily stopped.

Next, the operation of the base station 12 will be described with reference to FIGS. 5 and 6 .

FIG. 5 is a flowchart showing processing related to transmission of interference channel information in the base station 12 (here, the base station 12-1 in FIG. 1 is assumed). This process is started for every received frame.

As shown in the figure, when a wireless signal is received (S100), the interference signal detection unit 34 detects the signal used when communicating with the terminal station 14 in its own cell based on each carrier component of the complex symbol input from the signal processing unit 28. The channel generates an interfering interference signal (S102). Here, if no interference signal is detected at all, the base station 12-1 ends this process. On the other hand, if an interference signal is detected in S102, the interference channel information generator 36 generates interference channel information including a slot number and a subchannel number for identifying the channel of the interference signal (S104).

Next, the interference channel information transmission control unit 38 initializes the counter i to 1 (S106). Then, the signal processing unit 28 and the switching unit 22 are controlled so that the interference channel information generated in S104 is transmitted to the i-th adjacent base station among the six adjacent base stations 12-2 to 12-7, and the transmitting unit 26 is made to transmit the interference channel information Channel information (S108). For example, when the i-th adjacent base station is the base station 12-2, use the frame 1 (transmission source: base station 12-1) allocated to the own station in the super frame 2 (transmission destination: base station 12-2) The specified receiving time slot in the channel is used to transmit the interference channel information.

Then, the interference signal detection unit 34 checks whether or not the power of the interference signal detected in S102 has decreased (S110). Here, the base station 12-1 terminates this process when it detects that the confirmation interference signal power has decreased. On the other hand, if it is not confirmed that the interference signal power has decreased, the interference channel information transmission control unit 38 adds 1 to the counter i (S112), and repeatedly executes the processing of S108 and thereafter until the counter i exceeds the number of adjacent base stations n (herein 6) until (S114). That is, the interference channel information generated in S104 is repeatedly transmitted until the power of the interference signal detected in S102 decreases or is transmitted to all adjacent base stations 12-2 to 12-7.

FIG. 6 is a flowchart showing processing related to reception of interference channel information in the base station 12 (here, base station 12-2 in FIG. 1 ). This process is started for each reception frame or in a reception frame (here, a reception frame in super frame 2) in which interference channel information destined for the own station can be transmitted.

As described in the figure, if interference channel information is received (S200), the base station 12-2 performs carrier sense in an empty channel (S202). Next, the interference channel information acquisition unit 40 acquires the interference channel information transmitted by any adjacent base station 12 and its receiving timing from the signal processing unit 28, and determines whether the interference channel information is destined for the own station, that is, the receiving channel Whether or not the reception timing of the information falls within the super frame (here, super frame 2) whose own station is the destination (S204). Here, if the reception timing is not within the super frame of the own station, the base station 12-2 judges that the interference channel information received in S200 is destined for another station, and ends this process.

On the other hand, if it is determined in S204 that the reception timing of the interference channel information is within the super frame of the own station, the channel used judging unit 42 judges whether the own station is using the slot number and the subchannel number included in the interference channel information. The determined channel (S206). And, if the channel is not used, the base station 12-2 judges that there is no interference source among the terminal stations 14 communicating with the own station, and ends this process. Conversely, if it is determined to use the channel, the base station 12-2 determines that the terminal station 14 using the channel for communication is an interference source, and according to the carrier sense result in S202, allocates other empty channels to the terminal station 14 (S208 ).

According to the mobile communication system 10 described above, the base station 12 that detected the interference signal can reduce the radio wave interference from the terminal station 14 communicating with the adjacent base station 12 without determining the direction of arrival of the interference wave.

In addition, this invention is not limited to the said embodiment, Various deformation|transformation is possible.

For example, in the above-mentioned embodiments, the present invention is applied to mobile communication systems employing OFDMA schemes and TDMA/TDD schemes, but the present invention can also be applied to mobile communication systems employing other multiple access schemes.

Furthermore, in the mobile communication system 10 according to the above-mentioned embodiment, the base station 12 that has received the interference channel information recognizes whether the interference channel information is intended for the own station based on the reception timing, but the base station 12 that detects the interference signal transmits Contains interference channel information for identifying the base station ID of the transmission destination, and the base station 12 that receives the interference channel information can also identify whether the interference channel information is Take this site as the destination.

In this case, the base station 12 may store the interference reduction performance information in a storage unit such as a memory (see FIG. 7 ) for each adjacent base station 12, and determine the transmission destination of the interference channel information based on this information, wherein The interference reduction performance information indicates the actual number of times (number itself, frequency, probability, etc.) of power reduction of the interference signal indicated by the interference channel information immediately after the interference channel information is transmitted to the adjacent base station 12 . In this way, it is possible to preferentially transmit the interference channel information to the adjacent base station 12 whose base station 14 in the cell is likely to be an interference source.

In addition, the base station 12 may have only the configuration related to the above-mentioned interference channel information transmission (interference signal detection unit 34, interference channel information generation unit 36, interference channel information transmission control unit 38) and the configuration related to its reception (interference channel information Any one of the acquisition unit 40, the channel determination unit 42, and the channel allocation unit 44) is used. In this case, since the base station 12 having only the configuration related to the transmission of the interference channel information does not change the allocation of channels corresponding to the reception of the interference channel information, it is different from the base station 12 having only the configuration related to the reception of the interference channel information. Compared with 12, the communication priority is relatively high.

And, the base station 12 that detects the interference signal not only transmits the interference channel information to its adjacent base station 12, but also sends the interference channel information to the adjacent base stations 12 within the range where the base station 14 in its cell can become an interference source (adjacent range≥ adjacent range). In this case, the number of frames included in one super frame and the number of super frames included in one super frame group are greater than or equal to the number of base stations adjacent to each other.

Claims (8)

1. mobile communication system, it comprises a plurality of base station apparatus that communicate with terminal station device in the residential quarter, and described mobile communication system is characterised in that,

Described each base station apparatus comprises:

The interferer signal detection unit, it detects the channel that uses when communicating with described terminal station device and produces the interference signal of disturbing according to receiving signal; And

The interference channel information transmitting element, its interference channel information that will represent the channel of the interference signal that described interferer signal detection unit inspection goes out sends to contiguous base station apparatus successively, until the reduction of the power of this interference signal,

Receive the base station apparatus of the described interference channel information take our station as the destination in the situation of using the represented channel of this interference channel information, the distribution of changing this channel.

2. mobile communication system according to claim 1 is characterized in that,

Described interference channel information transmitting element employing is used for identification as the regulation timing of the base station apparatus that sends the destination, sends described interference channel information,

Whether the base station apparatus that receives described interference channel information regularly identifies this interference channel information take our station as the destination according to the reception of this interference channel information.

3. mobile communication system according to claim 2 is characterized in that,

Described each base station apparatus communicates by time division duplex and described terminal station device,

Described regulation regularly is based on the regulation received frame of time division duplex.

4. mobile communication system according to claim 1 is characterized in that,

Described interference channel information transmitting element sends described interference channel information, and described interference channel information comprises for the base station identification information of identification as the base station apparatus that sends the destination,

Receive the base station identification information that the base station apparatus of described interference channel information comprises according to this interference channel information and whether identify this interference channel information take our station as the destination.

5. mobile communication system according to claim 4 is characterized in that,

Described each base station apparatus also comprises interference and reduces the actual achievement information memory cell, this interference reduces the actual achievement information memory cell and stores the actual achievement information that reduces of disturbing according to the base station apparatus of each described vicinity, this interference reduces the under powered number of times that and then actual achievement information represent after this base station apparatus has sent described interference channel information the interference signal relevant with the represented channel of this interference channel information

Described interference channel information transmitting element reduces interference in the actual achievement information memory cell and reduces actual achievement information and decide to the sending order as the base station apparatus of the transmission destination of described interference channel information according to being stored in described interference.

6. the described mobile communication system of any one according to claim 1～5 is characterized in that,

Described each base station apparatus carries out radio communication by OFDM mode and time division multiple access way and described terminal station device,

The channel of using when communicating by letter with described terminal station device is by based on the subcarrier frequency of orthogonal frequency and the channel of determining based on time-multiplexed time slot.

7. base station apparatus, it communicates with terminal station device in the residential quarter, it is characterized in that, and described base station apparatus comprises:

The interference channel information receiving element, it receives interference channel information from other base station apparatus, and this interference channel information represents the communication of these other base station apparatus is produced the channel of the interference signal of disturbing; And

Channel-assignment unit, its interference channel information that receives at described interference channel information receiving element is take our station as the destination and is using in the situation of the represented channel of this interference channel information, changes the distribution of this channel.

8. the control method of a base station apparatus, this base station apparatus communicates with terminal station device in the residential quarter, and described control method is characterised in that, and it comprises following steps:

The interference channel information receiving step receives interference channel information from other base station apparatus, and this interference channel information represents the communication of these other base station apparatus is produced the channel of the interference signal of disturbing; And

Channel assignment step, the interference channel information that receives in described interference channel information receiving step is take our station as the destination and is using in the situation of the represented channel of this interference channel information, changes the distribution of this channel.

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