CN101663831B - 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
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- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 15
- 230000009467 reduction Effects 0.000 claims description 6
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- 238000006243 chemical reaction Methods 0.000 description 2
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- 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 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
Technical field
The present invention relates to a kind of mobile communication system, base station apparatus and control method thereof, relate in particular to a kind of reduction from the technology of 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 residential quarter mode, by a plurality of coverage areas restriction base stations within the specific limits with electric wave are set, can be between the base station the same frequency of Reusability.Therefore, each base station is subject 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 overlapping zone of the residential quarter 76-1 of two base stations and 76-2, the electric wave that sends from terminal station 74-6 not only arrives base station 72-2, sometimes also arrives base station 72-1.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 with base station 72-1, destroyed the 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.Like this, base station 72-1 can not by fast Fourier transform (Fast Fourier Transform, FFT) exactly demodulation from the reception signal of base station 74-1～74-5.Figure 10 is the figure of the demodulation constellation of the base station 72-1 in this situation of expression.As shown in the drawing, owing to harming 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 the 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, separate use take time slot as unit and be used for realizing the OFDM of at a high speed transmission and the MC-CDMA high to the vulnerability to jamming of interference signal, thus the improvement of realization 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, namely allow to prevent the deteriorated of communication quality by avoiding 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 residential quarter, 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 and produces the interference signal of disturbing according to receiving signal; And interference channel information transmitting element, it will represent that the interference channel information of the channel of the interference signal that described interferer signal detection unit inspection goes out sends to contiguous base station apparatus (neighbor base station device) successively, until the power of this interference signal reduces, 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.
According to the present invention, base station apparatus detects the interference signal that the employed channel generation of communicating by letter is disturbed according to receiving signal.And, will represent that via Wireline or radiolink the interference channel information of the channel of this interference signal is notified successively to the neighbor base station device, until the power of the interference signal that detects reduces.On the other hand, the base station apparatus that receives interference channel information take station certainly as the destination and using in the situation of the represented channel of this interference channel information, changes the distribution of this channel in the interference channel information that receives.Therefore, the direction of arrival of base station apparatus uncertain noises ripple 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 employing is used for identification as the regulation timing of the base station apparatus that sends the destination, send 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.According to this mode, the distribution of only having the base station apparatus corresponding with the transmission timing of interference channel information to change the represented channel of this 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 for the base station identification information of identification as the base station apparatus that sends the destination, receives the base station identification information that the base station apparatus of described interference channel information comprises according to this interference channel information and whether identifies this interference channel information take our station as the destination.
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 under powered number of times that and then actual achievement information represent to this base station apparatus has sent described interference channel information after the interference signal relevant with the represented channel of this interference channel information, 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 can be preferentially terminal station device in its residential quarter neighbor base station device that easily becomes interference source send interference channel information.Therefore, when preventing that channel change number of times is increased, can reduce the 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 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.According to this mode, in the mobile communication system that adopts OFDM mode and time division multiplexing duplex mode, the direction of arrival of base station apparatus uncertain noises ripple 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 residential quarter 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 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 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 residential quarter 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 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.
And, the present invention relates to a kind of control method of base station apparatus, this base station apparatus and the terminal station device in the residential quarter 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 and produces the interference signal of disturbing according to receiving signal; 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, until the power of this interference signal reduces.
And, the present invention relates to a kind of control method of base station apparatus, this base station apparatus and the terminal station device in the residential quarter 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 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.
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 movable-type portable telephone, portable information terminal or data communication device credit card.
As shown in Figure 1, each base station 12 is set to represent that the end that the end (cell edge) of the residential quarter 16 of communication coverage area is adjacent the residential quarter overlaps.For example, the residential quarter 16-1 of base station 12-1 has the overlapping zone of residential quarter 16-2～16-7 that is adjacent respectively base station 12-2～12-7.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 residential quarter, 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 respectively received frame, the transmission frame of base station 12, and each frame is respectively by consisting of 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 sub-channels 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 (Slot1～4) that is used for the identification time slot 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 to each base station 12 by each channel that will determine like this, realize the recycling of same frequency.In addition, in the back " ICH " shown in this figure is described.
In addition, each base station 12 is according to receiving signal, detects the channel that uses when communicate by letter with the terminal station 14 in the residential quarter and produces the interference signal of interference.And, the interference channel information that represents the channel of this interference signal is sent to adjacent base station 12 successively, until 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 take our station as the destination in received interference channel information, and is using in 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 noises ripples 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 section 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 receives 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, so that receive wireless signal with above-mentioned received frame (RX), send wireless signal with sending frame (TX).But, be not limited to this in the situation that send interference channel information described later with received frame.
Acceptance division 24 down-converts to baseband signal with the wireless signal that antenna 20 receives, and exports to signal processing part 28.
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 being sent 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, the removal at protection interval (Guard Interval), to the conversion of digital signal etc., and will obtained digital signal further be transformed to the phase place that represents each subcarrier and the multiple code-element string of amplitude by fast Fourier transform (FFT).And, process by the solution corresponding with modulation system mapping, 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 extracting like this are output in I/F section 30 or the control part 32.
And signal processing part 28 will be baseband signal by the data transformation of I/F section 30 or control part 32 inputs.Specifically, process by the mapping corresponding with modulation system, 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 section 30 or control part 32 inputs.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 conversion, protection interval additional etc. to analog signal, obtain baseband signal.The baseband signal that obtains like this is provided for sending part 26.
I/F section 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.
Control part 32 is made of CPU and memory etc., each one of control base station 12.And, as the related functional structure of the transmission of interference channel information described later, have interferer signal detection section 34, interference channel information generating unit 36, interference channel information transmission control part 38, as the related functional structure of the reception of interference channel information, have interference channel information obtaining section 40, use channel detection unit 42, channel allocation unit 44.These functions are carried out the various control programs that are stored in the memory by CPU and are realized.
Interferer signal detection section 34 is according to receiving signal (being each carrier component by the multiple code element of signal processing part 28 inputs) here, and algorithm according to the rules detects the channel that uses when communicate by letter with the terminal station 14 in the residential quarter and produces the interference signal of interference.For example can use ZF (Zero Forcing) equilibrium and other balancing techniques for detection of the algorithm of interference signal.
In the situation that interferer signal detection section 34 detects interference signal, interference channel information generating unit 36 generates interference channel information, and this interference channel information comprises timeslot number and the subchannel number for the channel of this interference signal of identification.
Interference channel information sends control part 38 control signal handling parts 28, so that the interference channel information that interference channel information generating unit 36 generates sends to adjacent base station 12 successively according to the frame of distributing to our station (regularly), until the power of the interference signal that interferer signal detection section 34 is detected reduces.Specifically, control signal handling part 28 is so that 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 in 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 in the situation of interference channel information, according to transmission source, predesignates the transmission of interference channel information 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 identify the transmission destination (with reference to Fig. 4 epimere) of interference channel information.Namely, send with super frame 1 interference channel information take base station 12-1 as the destination, with the interference channel information of super frame 2 transmissions take base station 12-2 as the destination ..., send in the situation of the interference channel information take base station 12-7 as the destination with super frame 7, according to sending the destination, predesignate the transmission of interference channel information regularly.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, so that in distributing to the frame of our station, as shown in Figure 2, send interference channel information with the regulation receiving slot (being the Slot3 that is labeled as the RX of ICH) of received frame here.Like this, when sending interference channel information in certain base station 12, because the receiving mode that its adjacent base station 12 all is 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 according to each super frame 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.
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, whether identifies obtained interference channel information take our station as the destination.Specifically, determine that this reception regularly is which super frame in the channel architecture that belongs to shown in Figure 4, in the situation consistent with transmission destination corresponding to determined super frame and our station, identify this interference channel information take our station as the destination.
In the obtained situation of interference channel information take our station as the destination of interference channel information obtaining section 40, use channel detection unit 42 to judge whether our stations use timeslot number and the determined channel of subchannel number that is included in this interference channel information.
Channel allocation unit 44 is by using channel detection unit 42 to be judged to be in the situation that our station using the channel that interference channel information represents the distribution of changing this channel.For example, other vacant channels are distributed to the communication of using the channel that interference channel information represents or channel allocation that interference channel information is represented to the channel of communicating by letter or temporarily stopping using interference channel information to represent at other-end station 14.
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 section 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 residential quarter 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 timeslot number and the subchannel number (S104) for the channel of this interference signal of identification.
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 so that the interference channel information that generates in S104 sends 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, in the situation that i adjacent base station is base station 12-2, (send the destination: (transmission source: the regulation receiving slot base station 12-1) sends interference channel information to the frame of distributing to our station 1 base station 12-2) with super frame 2.
Then, interferer signal detection section 34 confirms whether the power of the interference signal that detects 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, repeatedly carries out S108 and processing afterwards thereof, counts n (being 6) here (S114) until counter i surpasses adjacent base station.That is, repeatedly be sent in the interference channel information that generates among the S104, until the power of the interference signal that detects reduces or sends among all adjacent base station 12-2～12-7 in S102.
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 starts according to each received frame or in the received frame that can send the interference channel information take our station as the destination (being the received frame in the super frame 2 here).
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 this interference channel information whether with our station as the destination, 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 base station 12-2 is judged as the interference channel information that receives take other stations as the destination in S200, finishes this processing.
On the other hand, if in S204, be judged to be the reception timing of interference channel information in the super frame of our station, then use 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 mobile communication system 10 described above, the direction of arrival that detects the base station 12 uncertain noises ripples 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, receive the base station 12 of interference channel information according to this reception regularly, whether identify this interference channel information take our station as the destination, but the base station 12 that detects interference signal sends and comprises the interference channel information that sends the base station IDs of destination for identification, this interference channel information also can by relatively being included in base station IDs in this interference channel information and the base station IDs of our station, be identified take our station as the destination in the base station 12 that receives interference channel information whether.
In this case, base station 12 also can be according to each adjacent base station 12, to disturb reduction actual achievement information to store in the storage parts such as memory (with reference to Fig. 7), and decide the transmission destination of interference channel information according to this information, wherein, described interference reduces actual achievement information and represents 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, can be preferentially base station 14 in its residential quarter adjacent base station 12 that easily becomes interference source send interference channel information.
And base station 12 also can only have above-mentioned interference channel information and send related structure (interferer signal detection section 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 not carrying 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 relatively high.
And, the base station 12 that detects interference signal not only sends interference channel information to its adjacent base station 12, and the neighbor base station 12 that also can become the scope of interference source to the base station 14 that is positioned at its residential quarter sends interference channel information (contiguous scope 〉=adjacent scope).In this case, the super frame number that comprises of the frame number that comprises of 1 super frame and 1 super frame group is more than or equal to mutually contiguous base station number.
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.
Applications Claiming Priority (3)
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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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| JP (1) | JP4579266B2 (en) |
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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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| JP2003037556A (en) * | 2001-07-26 | 2003-02-07 | Nec Corp | Wireless lan system and its control method |
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| JP2008277973A (en) | 2008-11-13 |
| CN101663831A (en) | 2010-03-03 |
| JP4579266B2 (en) | 2010-11-10 |
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