CN101663831A - Mobile communication system, base station device, and its control method - Google Patents
Mobile communication system, base station device, and its control method Download PDFInfo
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- 238000010295 mobile communication Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 description 6
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- 238000006243 chemical reaction Methods 0.000 description 3
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- 230000006870 function Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
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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 areception 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 channelinformation destined to the local station is being used; a channel allocation unit (44) which modifies channel allocation.
Description
Technical field
The present invention relates to a kind of mobile communication system, base station apparatus and control method thereof, relate in particular to the technology of a kind of reduction from the wave interference in the terminal station that communicates with contiguous base station (hereinafter referred to as " neighbor base station ").
Background technology
In the mobile terminal system that has used the sub-district mode,, can between the base station, use same frequency repeatedly by a plurality of coverage area restriction base stations within the specific limits with electric wave are set.Therefore, each base station is subjected to the wave interference in the terminal station that communicates with its neighbor base station sometimes.
Specifically, in mobile communication system shown in Figure 8 70, when the terminal station 74-6 that communicates with base station (hereinafter referred to as " adjacent base station ") 72-2 adjacent to base station 72-1 moves in the sub-district 76-1 of two base stations and the 76-2 overlapping areas, the electric wave that sends from terminal station 74-6 not only arrives base station 72-2, also arrives base station 72-1 sometimes.Here, if mobile communication system 70 adopts OFDMA (Orthogonal Frequency Division Multiple Access, OFDM) mode, then the received spectrum of base station 72-1 for example as shown in Figure 9.As shown in the drawing, from not obtaining the electric wave that the terminal station 74-6 of carrier synchronization sends, destroyed orthogonality from each subcarrier in the reception ripple of the terminal station 74-1～74-5 that communicates by letter with base station 72-1 with base station 72-1.Like this, base station 72-1 can not by fast Fourier transform (Fast Fourier Transform, FFT) exactly demodulation from the received signal of base station 74-1～74-5.Figure 10 is the figure of the demodulation constellation of the base station 72-1 under this situation of expression.As shown in the drawing, owing to harm from the interference of terminal station 74-6, EVM (Error VectorMagnitude, error vector magnitude) is terminal station 74-3＜terminal station 74-4＜74-1＜terminal station, terminal station
As corresponding technology to this wave interference, in the patent document 1 following wireless communication system is disclosed for example, that is: according to spread state and communication environment, with the time slot is that unit separately is used to realize the OFDM of transmission at a high speed and the MC-CDMA high to the vulnerability to jamming of interference signal, thereby realizes the improvement of message capacity.
[patent document 1] TOHKEMY 2004-158901 communique
Yet, in the technology and other technology (for example, the adaptive array technology) that above-mentioned patent document 1 is put down in writing, promptly allow to prevent the deterioration of communication quality by the avoidance wave interference, also can't suppress wave interference generation itself.
Summary of the invention
The present invention makes in view of above-mentioned problem in the past, and its purpose is to provide a kind of mobile communication system, base station apparatus and control method thereof that can reduce from the wave interference in the terminal station that communicates with neighbor base station.
In order to solve above-mentioned problem, the present invention relates to a kind of mobile communication system, it comprises a plurality of base station apparatus that communicate with terminal station device in the sub-district, described mobile communication system is characterised in that, described each base station apparatus comprises: the interferer signal detection unit, and it detects the channel that uses when communicating with described terminal station device according to received signal and produces the interference signal of disturbing; And interference channel information transmitting element, it will represent that the interference channel information of the channel of the detected interference signal in described interferer signal detection unit sends to contiguous base station apparatus (neighbor base station device) successively, till the power of this interference signal reduces, receive with the our station be the base station apparatus of described interference channel information of destination under the situation of using the represented channel of this interference channel information, the distribution of changing this channel.
According to the present invention, base station apparatus detects according to received signal the employed channel of communicating by letter is produced the interference signal of disturbing.And, will represent that via Wireline or radiolink the interference channel information of the channel of this interference signal is notified to the neighbor base station device successively, till the power of the interference signal that is detected reduces.On the other hand, the base station apparatus that receives interference channel information is the destination and is using under the situation of the represented channel of this interference channel information with station certainly in the interference channel information that is received, changes the distribution of this channel.Therefore, the direction of arrival of the uncertain disturbing wave of base station apparatus just can reduce the wave interference from the terminal station device of communicating by letter with the neighbor base station device.
And, in an embodiment of the invention, described interference channel information transmitting element is used to discern the regulation timing as the base station apparatus that sends the destination, send described interference channel information, whether the base station apparatus that receives described interference channel information is regularly discerned this interference channel information according to the reception of this interference channel information is the destination with the our station.According to this mode, the distribution of having only the base station apparatus corresponding to change the represented channel of this interference channel information with the transmission timing of interference channel information.Therefore, base station apparatus can reduce the wave interference from the terminal station device of communicating by letter with the neighbor base station device when preventing that channel change number of times is increased.
In this mode, described each base station apparatus communicates by time division duplex and described terminal station device, and described regulation regularly can be based on the regulation received frame of time division duplex.Like this, base station apparatus does not need to be designed for the special circuit that receives interference channel information.
And, in a mode of the present invention, described interference channel information transmitting element sends described interference channel information, described interference channel information comprises the base station identification information that is used to discern as the base station apparatus that sends the destination, and whether the base station apparatus that receives described interference channel information is discerned this interference channel information according to the base station identification information that this interference channel information comprised is the destination with the our station.
In this mode, 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 and then under powered number of times of the interference signal relevant with the represented channel of this interference channel information to this base station apparatus has sent described interference channel information after of actual achievement information representation, and described interference channel information transmitting element can decide to the sending order as the base station apparatus of the transmission destination of described interference channel information according to the interference reduction actual achievement information in the described interference reduction actual achievement information memory cell of being stored in.Like this, base station apparatus preferentially the neighbor base station device that becomes interference source easily of the terminal station device in its sub-district send interference channel information.Therefore, when preventing that channel change number of times is increased, can reduce wave interference from the terminal station device of communicating by letter with the neighbor base station device.
And, in a mode of the present invention, described each base station apparatus carries out radio communication by OFDM mode and time division multiplexing duplex mode and described terminal station device, and the channel that uses 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.According to this mode, in the mobile communication system that adopts OFDM mode and time division multiplexing duplex mode, the direction of arrival of the uncertain disturbing wave of base station apparatus just can reduce the wave interference from the terminal station device of communicating by letter with the neighbor base station device.
In addition, the present invention relates to a kind of base station apparatus, itself and the terminal station device in the sub-district communicate, it is characterized in that, described base station apparatus comprises: the interferer signal detection unit, and it detects the channel that uses when communicating with described terminal station device according to received signal and produces the interference signal of disturbing; And the interference channel information transmitting element, its interference channel information that will represent the channel of the detected interference signal in described interferer signal detection unit sends to contiguous base station apparatus successively, till the power of this interference signal reduces.
And, the present invention relates to a kind of base station apparatus, itself and the terminal station device in the sub-district communicate, it is characterized in that, 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 is received at described interference channel information receiving element is to be the destination with the our station and to use under the situation of the represented channel of this interference channel information, changes the distribution of this channel.
And, the present invention relates to a kind of control method of base station device, this base station apparatus and the terminal station device in the sub-district communicate, described control method is characterised in that, it comprises following steps: the interferer signal detection step detects the channel that uses when communicating with described terminal station device according to received signal and produces the interference signal of disturbing; And the interference channel information forwarding step, its interference channel information that will represent the channel of detected interference signal in the described interferer signal detection step sends to contiguous base station apparatus successively, till the power of this interference signal reduces.
And, the present invention relates to a kind of control method of base station device, this base station apparatus and the terminal station device in the sub-district communicate, described control method is characterised in that, it comprises following steps: the interference channel information receiving step, receive interference channel information from other base station apparatus, 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 to be the destination with the our station and to use under the situation of the represented channel of this interference channel information, changes the distribution of this channel.
Description of drawings
Fig. 1 is the overall structure figure of the related mobile communication system of embodiments of the present invention.
Fig. 2 is the figure of an example of the related channel architecture of expression embodiments of the present invention.
Fig. 3 is the block diagram of the related base station of embodiments of the present invention.
The frame structure example of the distribution of employed frame when Fig. 4 is the transmission of expression interference channel information.
Fig. 5 is the flow chart of the related processing of the transmission of the interference channel information in the expression base station.
Fig. 6 is the flow chart of the related processing of the reception of the interference channel information in the expression base station.
Fig. 7 is the figure that an example of the storage part that reduces actual achievement information is disturbed in the expression storage.
Fig. 8 is the overall structure figure of mobile communication system.
The figure of one example of the received spectrum in the base station when Fig. 9 is the expression wave interference.
The figure of one example of the demodulation constellation in the base station when Figure 10 is the expression wave interference.
Embodiment
Below, with reference to the accompanying drawings an embodiment of the invention are elaborated.
Fig. 1 is the overall structure figure of the related mobile communication system of an embodiment of the invention 10.As shown in the drawing, mobile communication system 10 constitutes and comprises a plurality of base stations 12 and (only illustrate base station 12-1～12-7) and a plurality of terminal stations 14 (omitting diagram) here.Terminal station 14 for example is that movable-type portable telephone, portable information terminal or data communication are with blocking.
As shown in Figure 1, each base station 12 is set to represent that the end that the end (cell edge) of the sub-district 16 of communication coverage area is adjacent the sub-district overlaps.For example, the sub-district 16-1 of base station 12-1 has the sub-district 16-2～16-7 overlapping areas that is adjacent base station 12-2～12-7 respectively.And, each base station 12 is by TDD (Time Division Duplex, time division duplex) mode is carried out the transmitting-receiving of wireless signal with being positioned at from the terminal station 14 of sub-district, in addition, by OFDMA (Orthogonal FrequencyDivision Multiple Access, OFDM) mode and TDMA (Time DivisionMultiple Access, time division multiple access) mode is carried out multiplexed communications.
Fig. 2 is the figure of an example of the channel architecture in the expression mobile communication system 10.RX among this figure, TX represent received frame, the transmit frame of base station 12 respectively, and each frame is respectively by constituting based on time-multiplexed a plurality of time slots (being made as 4 time slots here).And, according to each time slot, a plurality of subchannels (being made as 10 subchannels here) that regulation is made of a plurality of subcarriers (for example 16 subcarriers) based on OFDM.And each employed channel of communicating by letter is by the timeslot number that is used to discern time slot (Slot1～4) and be used for the subchannel number of recognin channel frequency (combination of f1～f10) is determined.In mobile communication system 10, be respectively applied for each base station 12 by each channel that will determine like this, realize the utilization again of same frequency.In addition, in the back " ICH " shown in this figure is described.
In addition, each base station 12 is according to received signal, detects the channel that uses when communicate by letter with the terminal station 14 in the sub-district and produces the interference signal of interference.And, the interference channel information of representing the channel of this interference signal is sent to adjacent base station 12 successively, till the power of detected interference signal reduces.On the other hand, the base station 12 that receives interference channel information from adjacent base station 12 is to be the destination with the our station in received interference channel information, and is using under the situation of the represented channel of this interference channel information, changes the distribution of this channel.Like this, in mobile communication system 10, the direction of arrival that detects the base station 12 uncertain disturbing waves of interference signal just can reduce the wave interference from the terminal station 14 of communicating by letter with adjacent base station 12.
Below, in order to realize above-mentioned processing, the 26S Proteasome Structure and Function that base station 12 is possessed illustrates in greater detail.
Fig. 3 is the block diagram of base station 12.As shown in the drawing, base station 12 constitutes and comprises antenna 20, switching part 22, acceptance division 24, sending part 26, signal processing part 28, I/F portion 30 and control part 32.
The wireless signal that antenna 20 emission provides from sending part 26, and receive from the terminal station 14 or the wireless signal that sends of adjacent base station 12, the wireless signal that is received is exported to acceptance division 24.
Switching part 22 is with the transmitting-receiving of time division way switched antenna 20.Specifically, the connection destination of antenna 20 is switched to acceptance division 24 or sending part 26, make to receive wireless signal with above-mentioned received frame (RX), (TX) sends wireless signal with transmit frame.But, under the situation that sends interference channel information described later with received frame, be not limited thereto.
Sending part 26 will up-convert to wireless signal from the baseband signal of signal processing part 28 inputs, and be enlarged into the transmission output level, offer antenna 20.
The data of signal processing part 28 from sending by extraction terminal station 14 baseband signal of acceptance division 24 inputs or adjacent base station 12.Specifically; to undertaken by the baseband signal of acceptance division 24 input code element (symbol) synchronously, protection at interval (Guard Interval) removal, to the conversion of digital signal etc., and will obtained digital signal further be transformed to the phase place of representing each subcarrier and the multiple code-element string of amplitude by fast Fourier transform (FFT).And, separate mapping and handle by corresponding with modulation system, this multiple code-element string is transformed to corresponding binary data, obtain from the terminal station 14 or the data that send of adjacent base station 12.The data of Ti Quing are output in I/F portion 30 or the control part 32 like this.
And signal processing part 28 will be a baseband signal by the data conversion of I/F portion 30 or control part 32 inputs.Specifically, handle, will be transformed to the phase place of each subcarrier of expression and the multiple code-element string of amplitude by the binary data of I/F portion 30 or control part 32 inputs by the mapping corresponding with modulation system.And, should be transformed to digital signal by multiple code-element string by inverse fast Fourier transform (Inverse Fast Fourier Transform:IFFT), further carry out at interval additional etc. of conversion, protection to analog signal, obtain baseband signal.The baseband signal that obtains like this is provided for sending part 26.
I/F portion 30 will export to signal processing part 28 by the data of not shown epigyny device input, and will export to epigyny device by the data of signal processing part 28 inputs.
Interferer signal detection portion 34 is according to received signal (being each carrier component by the multiple code element of signal processing part 28 input here), and algorithm according to the rules detects the channel that uses when communicate by letter with the terminal station 14 in the sub-district and produces the interference signal of interference.The algorithm that is used to detect interference signal for example can be used balanced and other balancing techniques of ZF (Zero Forcing).
Detect in interferer signal detection portion 34 under the situation of interference signal, interference channel information generating unit 36 generates interference channel information, and this interference channel information comprises the timeslot number and the subchannel number of the channel that is used to discern this interference signal.
Interference channel information sends control part 38 control signal handling parts 28, the interference channel information that makes interference channel information generating unit 36 be generated sends to adjacent base station 12 successively according to the frame of distributing to our station (regularly), till the power of the interference signal that interferer signal detection portion 34 is detected reduces.Specifically, control signal handling part 28 makes to send interference channel information according to following timing.
The frame structure example of the distribution of employed frame when Fig. 4 is the transmission of expression interference channel information.Here, mobile communication system 10 have certain base station 12 around be provided with under the situation of cell structure of 6 adjacent base stations 12 (with reference to Fig. 1), show the example that distributes frame according to following mode, that is: each base station of 7 base stations 12 adjacent each other can send interference channel information (with reference to Fig. 4 hypomere) according to 7 frames.That is, base station 12-1 with frame 1 send interference channel information, base station 12-2 with frame 2 send interference channel information ..., base station 12-7 sends with frame 7 under the situation of interference channel information, according to the transmission source, the transmission of predesignating interference channel information is regularly.According to this frame structure, interference channel information sends the transmission timing of control part 38 control interference channel information, and thus, contiguous base station 12 can not be in same timed sending interference channel information.
And, in the frame structure example shown in this figure, with above-mentioned 7 frames as 1 super frame, and with 7 super frame as 1 super frame group, according to the super frame (regularly) that sends (reception) interference channel information, can discern the transmission destination (with reference to Fig. 4 epimere) of interference channel information.Promptly, send with super frame 1 with base station 12-1 be the destination interference channel information, with super frame 2 transmissions with base station 12-2 be the destination interference channel information ..., to send with base station 12-7 with super frame 7 be under the situation of interference channel information of destination, according to sending the destination, predesignate the transmission timing of interference channel information.According to this super frame structure, interference channel information sends the transmission timing of control part 38 control interference channel information, thus, interference channel information does not need to comprise the information that expression sends the destination, and successively interference channel information is sent to adjacent base station 12 with predetermined distance (every 7 frames).
In addition, interference channel information sends control part 38 also can control signal handling part 28 and switching part 22, make in distributing to the frame of our station, as shown in Figure 2, send interference channel information here with the regulation receiving slot (being the Slot3 that is labeled as the RX of ICH) of received frame.Like this, when sending interference channel information in certain base station 12, because the receiving mode that its adjacent base station 12 all is an interference channel information, so each base station 12 does not need to be designed for the special circuit that receives interference channel information.
And, in the frame structure example of Fig. 4, come the transmission destination of regulation interference channel information according to each super frame, come the transmission source of regulation interference channel information according to each frame in this super frame, conversely, also can come the transmission source of regulation interference channel information, come the transmission destination of regulation interference channel information according to each frame in this super frame according to each super frame.
Interference channel information obtaining section 40 obtains the interference channel information that is sent by any one adjacent base station 12 and receives regularly from signal processing part 28, and receives regularly according to this, and whether discern obtained interference channel information is the destination with the our station.Specifically, determine that this reception regularly is which super frame in the channel architecture that belongs to shown in Figure 4, under the situation consistent with corresponding transmission destination of determined super frame and our station, discerning this interference channel information is the destination with the our station.
In interference channel information obtaining section 40 obtained interference channel information is under the situation of destination with the our station, uses channel detection unit 42 to judge whether our station uses timeslot number and the determined channel of subchannel number that is included in this interference channel information.
The action of base station 12 then, is described according to Fig. 5 and Fig. 6.
Fig. 5 is the flow chart of the related processing of the transmission of the interference channel information in the expression base station 12 (hypothesis is the base station 12-1 among Fig. 1 here).This processing starts according to each received frame.
As shown in the drawing, when receiving wireless signal (S100), interferer signal detection portion 34 is according to each carrier component by the multiple code element of signal processing part 28 inputs, detects the channel that uses when communicate by letter with the terminal station 14 in the sub-district and produces the interference signal (S102) of interference.Here, if do not detect interference signal fully, then base station 12-1 finishes this processing.On the other hand, if detect interference signal in S102, then interference channel information generating unit 36 generates interference channel information, and this interference channel information comprises the timeslot number and the subchannel number (S104) of the channel that is used to discern this interference signal.
Then, interference channel information sends control part 38 counter i is initialized as 1 (S106).Then, control signal handling part 28 and switching part 22 make the interference channel information that generates in S104 send to i adjacent base station among 6 adjacent base station 12-2～12-7, and make sending part 26 send interference channel information (S108).For example, be under the situation of base station 12-2 at i adjacent base station, (send the destination: base station 12-2) (the transmission source: the regulation receiving slot base station 12-1) sends interference channel information to Nei the frame of distributing to our station 1 with super frame 2.
Then, interferer signal detection portion 34 confirms whether the power of detected interference signal reduces (S110) in S102.Here, when detecting the reduction of affirmation interfering signal power, base station 12-1 finishes this processing.On the other hand, if interfering signal power unconfirmed reduces, then interference channel information transmission control part 38 adds 1 (S112) with counter i, carries out S108 and processing afterwards thereof repeatedly, till counter i surpasses adjacent base station to count n (being 6) here (S114).That is, be sent in the interference channel information that generates among the S104 repeatedly, till the power of detected interference signal in S102 reduces or sends among all adjacent base station 12-2～12-7.
Fig. 6 is the flow chart of the related processing of the reception of the interference channel information in the expression base station 12 (being made as the base station 12-2 among Fig. 1 here).This processing is middle startup of received frame (being the received frame in the super frame 2 here) of the interference channel information of destination according to each received frame or sending with the our station.
As described in this figure, if receive interference channel information (S200), then base station 12-2 implements carrier sense (S202) in vacant channels.Then, interference channel information obtaining section 40 obtains the interference channel information that is sent by any one adjacent base station 12 and receives regularly from signal processing part 28, judge that whether this interference channel information is the destination with the our station, that is: the reception of this receiving channel information regularly whether with our station as the super frame (being super frame 2 here) that sends the destination in (S204).Here, if should receive regularly not in the super frame of our station, then to be judged as the interference channel information that receives in S200 be the destination with other stations to base station 12-2, finishes this processing.
On the other hand, if the reception timing that is judged to be interference channel information in S204 in the super frame of our station, then uses channel detection unit 42 to judge whether our stations are using timeslot number and the determined channel of subchannel number (S206) that is included in this interference channel information.And if do not use this channel, then base station 12-2 is judged as the composition that does not become interference source in the terminal station 14 that communicates with our station, finishes this processing.Conversely, use this channel if be judged to be, then base station 12-2 is judged as the terminal station 14 of using this channel to communicate and is interference source, according to the carrier sense result among the S202, to these terminal station 14 distribution other vacant channels (S208).
According to the mobile communication system 10 of above explanation, the direction of arrival that detects the base station 12 uncertain disturbing waves of interference signal just can reduce the wave interference from the terminal station 14 of communicating by letter with adjacent base station 12.
In addition, the present invention is not limited to above-mentioned execution mode, can carry out various distortion and implement.
For example, in the above-described embodiment, applied the present invention to adopt the mobile communication system of OFDMA mode and TDMA/TDD mode, but the present invention also can be applied to adopt the mobile communication system of other multi-access modes.
And, in the related mobile communication system 10 of above-mentioned execution mode, the base station 12 that receives interference channel information is according to this reception timing, whether discern this interference channel information is the destination with the our station, but the base station 12 that detects interference signal sends and comprises the interference channel information that is used to discern the base station IDs that sends the destination, the base station 12 that receives interference channel information also can be by relatively being included in the base station IDs in this interference channel information and the base station IDs of our station, and whether discern this interference channel information is the destination with the our station.
In this case, base station 12 also can be according to each adjacent base station 12, to disturb and reduce the actual achievement information stores in storage parts (with reference to Fig. 7) such as memory, and decide the transmission destination of interference channel information according to this information, wherein, described interference reduces the actual achievement information representation and then after this adjacent base station 12 has sent interference channel information, the under powered actual achievement number of times (number of times itself, frequency, probability etc.) of the interference signal that this interference channel information is represented.Like this, preferentially the base station in its sub-district 14 becomes the adjacent base station 12 transmission interference channel information of interference source easily.
And base station 12 also can only have above-mentioned interference channel information and send related structure (interferer signal detection portion 34, interference channel information generating unit 36, interference channel information send control part 38) and its and receive any one structure in the related structure (interference channel information obtaining section 40, use channel detection unit 42, channel allocation unit 44).In this case, only has the base station 12 of the related structure of the transmission of interference channel information owing to do not carry out the distributing altering of the channel corresponding with the reception of interference channel information, so compare with the base station 12 of the related structure of the reception that only has interference channel information, communication priority is higher relatively.
And, the base station 12 that detects interference signal not only sends interference channel information to its adjacent base station 12, also can become the neighbor base station 12 transmission interference channel information (contiguous scope 〉=adjacent scope) of the scope of interference source to the base station 14 that is positioned at its sub-district.In this case, the super frame number that comprised of the frame number that comprised of 1 super frame and 1 super frame group is more than or equal to contiguous mutually base station number.
Claims (10)
1, a kind of mobile communication system, it comprises the base station apparatus that a plurality of and terminal station device in the sub-district communicate, 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 according to received signal and produces the interference signal of disturbing; And
The interference channel information transmitting element, its interference channel information that will represent the channel of the detected interference signal in described interferer signal detection unit sends to contiguous base station apparatus successively, till the power of this interference signal reduces,
Receive with the our station be the base station apparatus of described interference channel information of destination under 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 is used to discern the regulation timing as the base station apparatus that sends the destination, sends described interference channel information,
Whether the base station apparatus that receives described interference channel information is regularly discerned this interference channel information according to the reception of this interference channel information is the destination with the our station.
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 the base station identification information that is used to discern as the base station apparatus that sends the destination,
Whether the base station apparatus that receives described interference channel information is discerned this interference channel information according to the base station identification information that this interference channel information comprised is the destination with the our station.
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 and then under powered number of times of the interference signal relevant with the represented channel of this interference channel information after this base station apparatus has sent described interference channel information of actual achievement information representation
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, according to any described mobile communication system in the claim 1～5, it is characterized in that,
Described each base station apparatus carries out radio communication by OFDM mode and time division multiplexing duplex mode and described terminal station device,
The channel that uses 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, a kind of base station apparatus, itself and the terminal station device in the sub-district communicate, and it is characterized in that described base station apparatus comprises:
The interferer signal detection unit, it detects the channel that uses when communicating with described terminal station device according to received signal and produces the interference signal of disturbing; And
The interference channel information transmitting element, its interference channel information that will represent the channel of the detected interference signal in described interferer signal detection unit sends to contiguous base station apparatus successively, till the power of this interference signal reduces.
8, a kind of base station apparatus, itself and the terminal station device in the sub-district communicate, and it is characterized in that 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 is received at described interference channel information receiving element is to be the destination with the our station and to use under the situation of the represented channel of this interference channel information, changes the distribution of this channel.
9, a kind of control method of base station device, this base station apparatus and the terminal station device in the sub-district communicate, and described control method is characterised in that it comprises following steps:
The interferer signal detection step detects the channel that uses when communicating with described terminal station device according to received signal and produces the interference signal of disturbing; And
The interference channel information forwarding step sends to contiguous base station apparatus successively with the interference channel information of representing the channel of detected interference signal in the described interferer signal detection step, till the power of this interference signal reduces.
10, a kind of control method of base station device, this base station apparatus and the terminal station device in the sub-district communicate, and described control method is characterised in that 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 are to be the destination with the our station and to use under the situation of the represented channel of this interference channel information, changes the distribution of this channel.
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| JP116847/2007 | 2007-04-26 | ||
| JP2007116847A JP4579266B2 (en) | 2007-04-26 | 2007-04-26 | Mobile communication system, base station apparatus and control method thereof |
| PCT/JP2008/055359 WO2008136219A1 (en) | 2007-04-26 | 2008-03-24 | Mobile communication system, base station device, and its control method |
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| US8705506B2 (en) * | 2007-11-16 | 2014-04-22 | Qualcomm Incorporated | Time reservation for a dominant interference scenario in a wireless communication network |
| US8346173B2 (en) * | 2009-03-20 | 2013-01-01 | Qualcomm Incorporated | Apparatus and methods for intercell interference cancellation via RNTI |
| US9084130B2 (en) | 2009-10-01 | 2015-07-14 | Nec Corporation | Mobile communication system, base station, network device, and control method and program thereof |
| JP5415308B2 (en) * | 2010-01-26 | 2014-02-12 | 京セラ株式会社 | Base station and method for adjusting reference timing in base station |
| JP5401725B2 (en) * | 2010-03-26 | 2014-01-29 | 株式会社国際電気通信基礎技術研究所 | Wireless communication system and wireless device used therefor |
| CN102594420B (en) * | 2011-01-10 | 2015-08-05 | 上海贝尔股份有限公司 | Disturbance restraining method in multipoint coordinated transmission system and device |
| JP2012147208A (en) * | 2011-01-11 | 2012-08-02 | Sumitomo Electric Ind Ltd | Base station device |
| EP2768268A4 (en) * | 2011-10-13 | 2015-12-02 | Fujitsu Ltd | Wireless communication system, base station, and wireless communication method |
| WO2014033772A1 (en) | 2012-08-27 | 2014-03-06 | 富士通株式会社 | Wireless communication method, wireless communication system, transmission terminal, and receiving terminal |
| CN106656225A (en) * | 2016-11-18 | 2017-05-10 | 湖州欧麦斯通信科技有限公司 | Automatic distribution communication system |
| JP7447334B1 (en) | 2022-12-28 | 2024-03-11 | 財團法人工業技術研究院 | Bandwidth portion management method for networks and controllers therefor |
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| JP3415978B2 (en) * | 1995-11-24 | 2003-06-09 | 富士通株式会社 | Carrier switching method |
| JP2000316183A (en) * | 1999-04-30 | 2000-11-14 | Ntt Docomo Inc | Mobile communication system and channel assignment method in the same system |
| JP2003037556A (en) * | 2001-07-26 | 2003-02-07 | Nec Corp | Wireless lan system and its control method |
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| WO2008136219A1 (en) | 2008-11-13 |
| CN101663831B (en) | 2013-01-30 |
| JP2008277973A (en) | 2008-11-13 |
| JP4579266B2 (en) | 2010-11-10 |
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