CN101626255A - Method, system, device and terminal for eliminating interference - Google Patents
Method, system, device and terminal for eliminating interference Download PDFInfo
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- CN101626255A CN101626255A CN200810116565A CN200810116565A CN101626255A CN 101626255 A CN101626255 A CN 101626255A CN 200810116565 A CN200810116565 A CN 200810116565A CN 200810116565 A CN200810116565 A CN 200810116565A CN 101626255 A CN101626255 A CN 101626255A
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Abstract
The invention discloses a method and a device for eliminating interference. The interference elimination method of the embodiment comprises the following steps that: a target cell acquires configuration information of an adjacent cell and sends the acquired configuration information of the adjacent cell to a terminal accessed to the target cell; the target cell acquires the information on a physical resource block conflicting with the adjacent cell and sends the information to the terminal; and the terminal uses the configuration information of the adjacent cell and adopts a multi-user detection technique to detect out adjacent cell signals in received signals on the physical resource block. By using the method and the device, the utilization rate of the physical resource block can be improved while eliminating the interference caused by the adjacent cell signals in the received signals.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of interference elimination method, system, device and terminal.
Background technology
(Long Term Evolution LTE) in the system, determines to adopt OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology to Long Term Evolution at present.Usually, employed different frequency can be a quadrature in the same sub-district, and the frequency of using between different districts can be identical.
For the different districts that uses same frequency, the such sub-district that particularly has neighbouring relations, the minizone can produce interference, for the terminal that inserts one of them sub-district, particularly be positioned at terminal (the User Equipment that inserts cell edge, UE), disturb, cause it to receive the ability drop of the signal that inserts the sub-district owing to be subjected to neighbor cell signal.In the network that comprises Target cell with neighbouring relations and adjacent sub-district thereof for example shown in Figure 1, if identical frequency is used with Target cell in adjacent sub-district, the terminal that then inserts Target cell is carried out basic resources unit-Physical Resource Block that radio communication received, and (Physical Resource Block, PRB) sending the Physical Resource Block that signal adopts with adjacent sub-district may be identical.
The method of eliminating presence of intercell interference at present in the LTE system comprises a kind of interference coordination (Inter-CellInterference Coordination, ICIC) method.So that access Target cell terminal reduces the interference of the adjacent cell signal that may be subjected to is example, and existing ICIC method comprises:
S101: (Relative Narrowband TX PowerIndicator RNTP) gives Target cell to the relevant narrow band transmission power indication of adjacent cell transmission.Comprise among the described RNTP adjacent sub-district in the coverage terminal adopted, and may cause the PRB of interference to the terminal that inserts Target cell.
In descending ICIC mode, need to transmit this parameter of RNTP.The effect of this parameter is the downlink transmission power grade that is used to refer on the adjacent sub-district PRB.Concrete, adjacent sub-district will be notified to Target cell by the RNTP parameter with the PRB that high power sends with adjacent sub-district, and like this, Target cell is avoided these PRB as far as possible when scheduling edge UE.
S102: Target cell when distributing PRB, the PRB that indicates among the RNTP that as far as possible avoids sending adjacent sub-district.
Continue from the preceding paragraph, citing a plain example is illustrated, and establish and can adopt these two PRB of PRB1, PRB2 in the Target cell, and PRB1 and these two PRB of PRB3 can be adopted in adjacent sub-district.The decision of adjacent sub-district is adopted after the PRB1, sends RNTP and is indicated to Target cell, comprises the PRB1 that adjacent sub-district will be adopted among this RNTP.After then Target cell is received the RNTP that sends adjacent sub-district, when distributing PRB, will avoid the PRB1 that use adjacent sub-district as far as possible, and distribute PRB2.For example, do not use PRB1, and only use PRB2, perhaps use PRB1 yet, use but need to reduce power.Next, the terminal that inserts Target cell adopts the PRB2 that distributes to communicate.Like this, owing to insert the obsolete PRB2 in adjacent sub-district that the terminal of Target cell adopts, and just open the PRB1 that also use adjacent sub-district as far as possible, like this, reduced the interference that adjacent cell signal may constitute the end of inserting Target cell.
In research and practice process to prior art, the inventor finds to exist in the prior art following problem:
After above-mentioned Target cell is received the RNTP indication of sending adjacent sub-district, avoid adopting the PRB in the described RNTP indication as far as possible, like this, just reduced the utilance of PRB resource in the Target cell; Perhaps under the situation that reduces power, use PRB, reduced efficiency of transmission.As top example, the initial available PRB resource of Target cell comprises PRB1 and PRB2, after receiving the RNTP indication that send adjacent sub-district, avoids adopting the PRB1 that indicates among the RNTP as far as possible, then Target cell can normally use only has been left PRB2, thereby has reduced the utilance of PRB resource.
Summary of the invention
The embodiment of the invention provides a kind of interference elimination method, system, device and terminal, to realize improving the utilance of PRB resource.
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of dried interference elimination method, system, device and terminal to be achieved in that
A kind of interference elimination method comprises:
Target cell obtains adjacent community configured information and the adjacent community configured information that will obtain sends to the terminal that inserts described Target cell;
Target cell obtains the physical resource block message that conflicts with adjacent sub-district and sends terminal;
Described terminal is utilized the configuration information of described adjacent sub-district, adopts multiuser detection on described Physical Resource Block the adjacent cell signal in the received signal to be detected.
Preferably, the configuration information of described adjacent sub-district comprises pilot tone and the scrambler that adopt adjacent sub-district.
Preferably, described Target cell obtains the Physical Resource Block information of conflicting with adjacent sub-district and comprises:
Target cell receives the physical resource block message that adopt described adjacent sub-district;
Target cell conflicts by Physical Resource Block and Target cell self Physical Resource Block that will distribute or that used that detects the adjacent sub-district employing that receives and obtains the Physical Resource Block conflicting information.
Preferably, described Target cell obtains the Physical Resource Block information that adopts described adjacent sub-district and comprises:
Target cell receives the physical resource block message that adopt the described adjacent sub-district of sending by X2 interface described adjacent sub-district.
Preferably, described Target cell obtains the Physical Resource Block information of conflicting with adjacent sub-district and comprises:
Before Target cell distributed Physical Resource Block, transmission comprised described physical resource block message with distribution and arrives described adjacent sub-district;
Target cell receives the information of described Physical Resource Block conflict and is transmitted to described terminal.
Preferably, described Target cell sends and comprises the physical resource block message that will distribute and comprise to adjacent sub-district:
Target cell comprises the physical resource block message that will distribute by the X2 interface transmission and arrives adjacent sub-district.
Preferably, before described Target cell employing multiuser detection detects, also comprise:
Target cell receives the modulating-coding grade of the terminal employing that inserts described adjacent sub-district and sends to described terminal;
Correspondingly, described terminal employing multiuser detection detects the adjacent cell signal in the received signal and comprises:
The adjustment coding grade that the terminal utilization receives adopts the adjacent cell signal of multiuser detection in to received signal to carry out bit-level and detects.
A kind of interference cancelling system comprises base station and terminal, wherein,
Described base station comprises:
The configuration information acquiring unit is used to obtain the configuration information of adjacent sub-district; Described configuration information comprises the pilot tone and the scrambler of adjacent sub-district; The configuration information transmitting element is used to send the configuration information of described reception to the terminal that inserts;
Physical Resource Block conflicting information acquiring unit is used to obtain the physical resource block message that conflicts with adjacent sub-district;
Physical Resource Block conflicting information retransmission unit, the physical resource block message that conflicts with adjacent sub-district that is used for obtaining is transmitted to terminal;
Described terminal comprises:
Adjacent community configured information receiving element is used to receive adjacent community configured information;
The Physical Resource Block information receiving unit is used for the physical resource block message that conflicts with adjacent sub-district in the receiving target sub-district;
The Interference Detection unit is used to utilize the configuration information of described adjacent sub-district, adopts multiuser detection on described Physical Resource Block the adjacent cell signal in the received signal to be detected.
Preferably, in the described system, described Physical Resource Block conflicting information acquiring unit comprises:
The Physical Resource Block information receiving unit is used to receive the fast information of physical resource that adopt the adjacent sub-district of sending adjacent sub-district;
The collision detection unit, Physical Resource Block and Target cell self Physical Resource Block that will distribute or that used that adopts by the adjacent sub-district that detect to receive conflicts and obtains the Physical Resource Block conflicting information.
Preferably, in the described system, described Physical Resource Block conflicting information acquiring unit comprises:
The Physical Resource Block information transmitting unit, be used to send comprise described with the physical resource block message that distributes to adjacent sub-district;
The conflicting information receiving element is used to receive the information that described Physical Resource Block conflicts.
A kind of interference blanking unit comprises:
The configuration information acquiring unit is used to obtain the configuration information of adjacent sub-district; Described configuration information comprises the pilot tone and the scrambler of adjacent sub-district; The configuration information transmitting element is used to send the configuration information of described reception to the terminal that inserts;
Physical Resource Block conflicting information acquiring unit is used to obtain the physical resource block message that conflicts with adjacent sub-district;
Physical Resource Block conflicting information retransmission unit, the physical resource block message that conflicts with adjacent sub-district that is used for obtaining is transmitted to terminal.
Preferably, described device is arranged in the base station at Target cell place.
A kind of terminal comprises:
Adjacent community configured information receiving element is used to receive adjacent community configured information;
The Physical Resource Block information receiving unit is used for the physical resource block message that conflicts with adjacent sub-district in the receiving target sub-district;
The Interference Detection unit is used to utilize the configuration information of described adjacent sub-district, adopts multiuser detection on described Physical Resource Block the adjacent cell signal in the received signal to be detected.
The technical scheme that provides by the above embodiment of the invention as seen, Target cell promptly comprises scrambler and the pilot tone that adopt adjacent sub-district at the configuration information that has obtained adjacent sub-district, and these configuration informations is sent to the terminal of access; Target cell obtains the physical resource block message that conflicts with adjacent sub-district and sends terminal.Described terminal is utilized these configuration informations, adopts multiuser detection, can from the signal that receives the input of adjacent sub-district be come out on described Physical Resource Block.Like this, in the remaining signal, mainly be the signal (also having the less white noise of part influence) that the actual Target cell that will receive is sent, reached and reduced the purpose of disturbing.Simultaneously, Target cell in this example can use identical PRB with adjacent sub-district, and the PRB that does not have adjacent sub-district and Target cell employing produces any restriction, that is to say the utilance that does not reduce Target cell and adjacent sub-district PRB resource, thereby, improved the utilance of PRB resource with respect to prior art.
Description of drawings
Fig. 1 is the principle schematic of area interference in the prior art;
Fig. 2 is the flow chart of the present invention one method embodiment;
Fig. 3 is the flow chart of other method embodiment of the present invention;
Fig. 4 is the block diagram of the present invention's one system embodiment;
Fig. 5 is the block diagram of another system embodiment of the present invention;
Fig. 6 is the block diagram of another system embodiment of the present invention;
Fig. 7 is the block diagram of the present invention one device embodiment;
Fig. 8 is the block diagram of the present invention one terminal embodiment.
Embodiment
The embodiment of the invention provides a kind of interference elimination method, system, device and terminal.
In order to make those skilled in the art person understand the present invention program better, the embodiment of the invention is described in further detail below in conjunction with drawings and embodiments.
Below the interference that still is subjected to the terminal that reduces the access Target cell is that example is illustrated, and, the sub-district unification adjacent with described Target cell is called adjacent sub-district.The adjacent sub-district here can be one, also can be more than one, and the concrete terminal to inserting Target cell that can depend on constitutes the number of disturbing adjacent sub-district.For example, if constitute the adjacent sub-district of having only of disturbing for the terminal that inserts Target cell, then adjacent sub-district is described adjacent sub-district; If constitute a plurality of adjacent sub-districts that comprise of disturbing for the terminal that inserts Target cell, then adjacent sub-district is described a plurality of adjacent sub-district.
Below introduce an example of interference elimination method of the present invention.Fig. 2 shows the flow chart of this example, as Fig. 2, comprising:
S201: Target cell obtains adjacent community configured information and the adjacent community configured information that will obtain sends to the terminal that inserts described Target cell.
Concrete, Target cell can receive the configuration information that adopt the described adjacent sub-district of sending adjacent sub-district by X2 interface.X2 interface is that the base station (among the LTE for enhanced base station, E-NodeB) and the interface between the base station, can communicate by X2 interface between the base station.
Described adjacent community configured information specifically can comprise pilot tone and the scrambler that adopt adjacent sub-district.The configuration information difference of each sub-district is as the pilot tone difference that adopts.
In subsequent step, need carry out Multiuser Detection, promptly insert the input that the terminal of Target cell sends adjacent sub-district in the signal that receives and come out, thereby filter out the signal that wherein really needs the Target cell that receives.And in the process of Multiuser Detection, need carry out according to the configuration information of different districts, and comprise the configuration information of above-mentioned adjacent sub-district in the configuration information, as pilot tone and scrambler.And the terminal that inserts Target cell also must be known and that is to say that the configuration information of knowing Target cell is the prerequisite that terminal can insert Target cell by the configuration information of Target cell.Described pilot tone is used to detect the process with restituted signal for the terminal that inserts Target cell, for example be used to estimate the process of channel.Scrambler is used for distinguishing cell at down direction, can carry out descrambling to the received signal behind the scrambler of the Target cell that terminal obtains inserting.Pilot tone and scrambler that adjacent sub-district sends the signal employing generally also are constant.The relatively-stationary information in adjacent sub-district in the information that this step of S201 needs Multiuser Detection just sends to the terminal that inserts Target cell in advance and in once transmitting, and can avoid all transmitting relatively-stationary configuration information so at every turn, thereby reduces load.
S202: before Target cell is given the terminal distribution PRB of described access Target cell, send the PRB information that self adopts and arrive adjacent sub-district.
Usually, Target cell is given the terminal distribution PRB of described access Target cell, and afterwards, described terminal adopts the PRB that distributes to communicate by letter with the Target cell of access, the signal that the Target cell that described terminal reception inserts sends by the PRB that distributes.
The PRB of the terminal distribution that Target cell give to insert or be about to may produce for the PRB of the terminal distribution that inserts with the signal that send adjacent sub-district and disturbs, and that is to say may be identical with the PRB that adopt adjacent sub-district.Here, Target cell informs that the other side's Target cell will be for the PRB of the terminal distribution that inserts it, if identical PRB also will be adopted or adopted in adjacent sub-district, like this by taking follow-up measure can reduce the interference that may bring before distributing PRB.
S203: when the PRB that the PRB and adjacent sub-district self that adjacent cell detection adopts to the Target cell that receives uses conflicted, the feedback conflicting information was given Target cell.
After adjacent sub-district received the PRB information of the employing that Target cell sends, whether identical, whether conflict is promptly arranged if can detect PRB and adjacent sub-district self PRB that will adopt or that adopted that Target cell adopts.If conflict is arranged, then can feed back conflicting information and give Target cell.Here, adjacent sub-district can feed back to Target cell with conflicting information by X2 interface.
S204: Target cell receives and transmits the terminal that described conflicting information is given described access Target cell.
In this step, also comprise the PRB of conventional Target cell for the terminal distribution that inserts it, the PRB that Target cell and the terminal communication that inserts it just adopted, the PRB that adopts with adjacent sub-district is identical.Certainly, distribute this content of PRB also can be arranged in preceding step.Do not limit at this.
S205: after described terminal receives described conflicting information, utilize the configuration information of described adjacent sub-district, on described PRB, adopt multiuser detection that the adjacent cell signal in the received signal is detected.
For described terminal, the Target cell of adjacent sub-district and access adopts identical PRB, is the PRB that the Target cell that inserts is sent and Target cell really need receive.In the prior art, because terminal can not be distinguished the signal (PRB) that send adjacent sub-district in the signal of reception, therefore the signal that sends of adjacent sub-district receives signal that the Target cell that inserts sends for terminal and constitutes and disturb.And in this example, Target cell promptly comprises scrambler and the pilot tone that adopt adjacent sub-district at the configuration information that has obtained adjacent sub-district, and these configuration informations is sent to the terminal of access.Described terminal is utilized these configuration informations, adopts multiuser detection, can from the signal that receives the input of adjacent sub-district be come out.Like this, in the remaining signal, mainly be the signal (also having the less white noise of part influence) that the actual Target cell that will receive is sent, reached and reduced the purpose of disturbing.Simultaneously, Target cell in this example can use identical PRB with adjacent sub-district, and the PRB that does not have adjacent sub-district and Target cell employing produces any restriction, that is to say the utilance that does not reduce Target cell and adjacent sub-district PRB resource, thereby, improved the utilance of PRB resource with respect to prior art.
In some other prior arts, for the interference that reduces that the signal sent adjacent sub-district constitutes to the terminal that inserts Target cell, the mode that reduces the coding grade that terminal adopted that inserts Target cell that adopts is also arranged, but, such mode has reduced code efficiency undoubtedly, and then has reduced communication efficiency; Also have and adopt the mode that retransmits, still, such mode obviously can be wasted resource, brings the complicated lengthy and tedious of transmission course, and causes time delay.And in the example of the present invention, can avoid these problems.
Concrete, the terminal that inserts Target cell has obtained the configuration information of adjacent sub-district (concrete as pilot tone, scrambler) and afterwards, has adopted multiuser detection, detects constituting the adjacent cell signal that disturbs.Here, can not need to detect the particular content of interference signal, thus do not need to know modulation system, the coded system of interference signal, information such as code check, and the detection that only needs interference signal to be carried out symbol level gets final product.More specifically, multiuser detection mainly is that the channel of a plurality of sub-districts is estimated respectively, channel according to a plurality of sub-districts comes out the data demodulates of a plurality of sub-districts simultaneously, channel estimating to a plurality of sub-districts can estimate according to pilot tone, can be a Multiuser Detection of doing different modes of dividing that sign indicating number divides or empty according to the data of different districts to the demodulation of a plurality of cell datas.
In aforementioned S201, be in order to reduce load, to avoid all transmitting relatively-stationary adjacent community configured information at every turn, and the relatively-stationary information in the information that Multiuser Detection is needed in advance and once sending to the terminal that inserts Target cell in the transmission.Certainly, also can be Target cell each distribute PRB before, all obtain the configuration information of adjacent sub-district and send it to the terminal of access.Such mode though load increases to some extent on the whole, correctly be detected interference signal can for the terminal that inserts Target cell and bring assurance more reliably, for example can overcome the situation that the configuration of adjacent sub-district changes suddenly.Therefore, above-mentioned steps S201 also can be after S202, perhaps after the S203, perhaps after the S204.
Below introduce second embodiment of the inventive method, can be as shown in Figure 3, specific as follows:
S301: Target cell obtains adjacent community configured information and the adjacent community configured information that will obtain sends to the terminal that inserts described Target cell.
This step and abovementioned steps S201 are similar, do not repeat them here.
S302: Target cell receives the PRB information that send described adjacent sub-district.
In this step, with different among the embodiment of front, be the PRB information that Target cell receives the employing of sending adjacent sub-district, for example adjacent sub-district is about to PRB that adopts or the PRB that has adopted.
The PRB of the terminal distribution that Target cell give to insert or be about to may produce for the PRB of the terminal distribution that inserts with the signal that send adjacent sub-district and disturbs, and that is to say may be identical with the PRB that adopt adjacent sub-district.Here, Target cell receives the PRB information of sending adjacent sub-district, can learn the PRB that adjacent sub-district will be adopted or adopt, like this by taking follow-up measure can reduce the interference that may bring.
S303: when Target cell detects PRB and Target cell self PRB that will distribute or that used that the adjacent sub-district of reception adopts and conflicts, described conflicting information is sent to the terminal of described access Target cell.
In this step, Target cell detects under the situation that PRB that the PRB and Target cell self that adjacent sub-district that adjacent sub-district sends adopt adopt conflict, with the terminal of conflicting information transmission access Target cell.In this step, also comprise the PRB of conventional Target cell for the terminal distribution that inserts it, the PRB that Target cell and the terminal communication that inserts it just adopted, the PRB that adopts with adjacent sub-district is identical.Certainly, distribute this content of PRB also can be arranged in preceding step.Do not limit at this.
Other content and aforementioned first embodiment are similar, also repeat no more at this.
S304: after described terminal receives conflicting information, utilize the configuration information of described adjacent sub-district, adopt multiuser detection on described PRB, the adjacent cell signal in the received signal to be detected.
S205 in this step and the previous embodiment is similar, also repeats no more at this.
Similar with the front, among this embodiment, S301 also can be after S302, perhaps after the S303.
It is to be noted, above among two embodiment, Target cell receives the PRB information of the adjacent sub-district employing of sending adjacent sub-district, and perhaps Target cell sends the PRB information that self adopts and arrives adjacent sub-district, its essence is to know whether can conflict mutually with the PRB that adopt adjacent sub-district.
Here point out again a bit, the configuration information of the adjacent sub-district that above-mentioned Target cell obtains, and obtain the PRB that adopt adjacent sub-district, as a kind of implementation, can be to send to Target cell by adjacent sub-district by X2 interface to realize.That is to say, be a kind of implementation by X2 interface, but be not to finish transmission by X2 interface.This that is to say, also can transmit by alternate manner, and finally obtain these information by Target cell.For example can be that adjacent sub-district is by base station controller (Radio Network Controller, RNC) send to Target cell, or, there are above-mentioned full detail or partial information among the RNC in advance, when Target cell needs these information, directly from RNC, receive by Target cell.Above-mentioned RNC is an example also, also can be to be realized by entity in the core net or network element.
In addition, be that example is illustrated for the detection of with the terminal that inserts Target cell interference signal being carried out symbol level in the above-mentioned example, in fact,, can also be the detection of interference signal being carried out bit-level based on actual conditions.Under such situation, the terminal that inserts Target cell also need to obtain to insert the modulating-coding grade that terminal adopted of described adjacent sub-district (Modulation Coding Scheme, MCS).Concrete, MCS can comprise modulation system and encoding rate at least.The terminal that inserts Target cell can be carried out the detection of bit-level to the interference signal in the signal that receives after the modulation system that has obtained described adjacent sub-district, encoding rate information.And foregoing can receive the modulating-coding grade of the terminal employing that inserts described adjacent sub-district and send to described terminal and realize by Target cell.
Below introduce the example of interference cancelling system among the present invention.Fig. 4 shows the block diagram of this example, comprises base station 41 and terminal 42:
Configuration information acquiring unit 411 is used to obtain the configuration information of adjacent sub-district; Described configuration information comprises the pilot tone and the scrambler of adjacent sub-district;
Configuration information transmitting element 412 is used to send the configuration information of described reception to the terminal that inserts;
Physical Resource Block conflicting information acquiring unit 413 is used to obtain the physical resource block message that conflicts with adjacent sub-district;
Physical Resource Block conflicting information retransmission unit 414, the physical resource block message that conflicts with adjacent sub-district that is used for obtaining is transmitted to terminal;
Described terminal 42 comprises:
Adjacent community configured information receiving element 421 is used to receive adjacent community configured information;
Physical Resource Block information receiving unit 422 is used for the physical resource block message that conflicts with adjacent sub-district in the receiving target sub-district;
Described system can also be as shown in Figure 5, and described Physical Resource Block conflicting information acquiring unit 413 comprises:
Physical Resource Block information receiving unit 501 is used to receive the fast information of physical resource that adopt the adjacent sub-district of sending adjacent sub-district;
Described system can also be as shown in Figure 6, and described Physical Resource Block conflicting information acquiring unit 413 comprises:
Physical Resource Block information transmitting unit 601, be used to send comprise described with the physical resource block message that distributes to adjacent sub-district;
Conflicting information receiving element 602 is used to receive described Physical Resource Block conflicting information.
Below introduce the example of interference blanking unit among the present invention.Fig. 7 shows the block diagram of this example, comprising:
Configuration information acquiring unit 711 is used to obtain the configuration information of adjacent sub-district; Described configuration information comprises the pilot tone and the scrambler of adjacent sub-district;
Configuration information transmitting element 712 is used to send the configuration information of described reception to the terminal that inserts;
Physical Resource Block conflicting information acquiring unit 713 is used to obtain the physical resource block message that conflicts with adjacent sub-district;
Physical Resource Block conflicting information retransmission unit 714, the physical resource block message that conflicts with adjacent sub-district that is used for obtaining is transmitted to terminal.
Described device is arranged in the base station at Target cell place.
Below introduce the example of terminal of the present invention.Fig. 8 shows the block diagram of this example, comprising:
Adjacent community configured information receiving element 821 is used to receive adjacent community configured information;
Physical Resource Block information receiving unit 822 is used to receive the physical resource block message that the Target cell that inserted conflicts with adjacent sub-district;
Though described the embodiment of the invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (13)
1, a kind of interference elimination method is characterized in that, comprising:
Target cell obtains adjacent community configured information and the adjacent community configured information that will obtain sends to the terminal that inserts described Target cell;
Target cell obtains the physical resource block message that conflicts with adjacent sub-district and sends terminal;
Described terminal is utilized the configuration information of described adjacent sub-district, adopts multiuser detection on described Physical Resource Block the adjacent cell signal in the received signal to be detected.
2, the method for claim 1 is characterized in that, the configuration information of described adjacent sub-district comprises pilot tone and the scrambler that adopt adjacent sub-district.
3, the method for claim 1 is characterized in that, described Target cell obtains the Physical Resource Block information of conflicting with adjacent sub-district and comprises:
Target cell receives the physical resource block message that adopt described adjacent sub-district;
Target cell conflicts by Physical Resource Block and Target cell self Physical Resource Block that will distribute or that used that detects the adjacent sub-district employing that receives and obtains the Physical Resource Block conflicting information.
4, method as claimed in claim 3 is characterized in that, described Target cell receives the Physical Resource Block information that adopts described adjacent sub-district and comprises:
Target cell receives the physical resource block message that adopt the described adjacent sub-district of sending by X2 interface described adjacent sub-district.
5, the method for claim 1 is characterized in that, described Target cell obtains the Physical Resource Block information of conflicting with adjacent sub-district and comprises:
Before Target cell distributed Physical Resource Block, transmission comprised described physical resource block message with distribution and arrives described adjacent sub-district;
Target cell receives the information of described Physical Resource Block conflict and is transmitted to described terminal.
6, method as claimed in claim 5 is characterized in that, described Target cell sends the physical resource block message that comprises distributing and comprises to adjacent sub-district:
Target cell comprises the physical resource block message that will distribute by the X2 interface transmission and arrives adjacent sub-district.
7, as each described method in the above-mentioned claim 1 to 6, it is characterized in that, before described terminal employing multiuser detection detects, also comprise:
Target cell receives the modulating-coding grade of the terminal employing that inserts described adjacent sub-district and sends to described terminal;
Correspondingly, described terminal employing multiuser detection detects the adjacent cell signal in the received signal and comprises:
The adjustment coding grade that the terminal utilization receives adopts the adjacent cell signal of multiuser detection in to received signal to carry out bit-level and detects.
8, a kind of interference cancelling system is characterized in that, comprises base station and terminal, wherein,
Described base station comprises:
The configuration information acquiring unit is used to obtain the configuration information of adjacent sub-district; Described configuration information comprises the pilot tone and the scrambler of adjacent sub-district; The configuration information transmitting element is used to send the configuration information of described reception to the terminal that inserts;
Physical Resource Block conflicting information acquiring unit is used to obtain the physical resource block message that conflicts with adjacent sub-district;
Physical Resource Block conflicting information retransmission unit, the physical resource block message that conflicts with adjacent sub-district that is used for obtaining is transmitted to terminal;
Described terminal comprises:
Adjacent community configured information receiving element is used to receive adjacent community configured information;
The Physical Resource Block information receiving unit is used for the physical resource block message that conflicts with adjacent sub-district in the receiving target sub-district;
The Interference Detection unit is used to utilize the configuration information of described adjacent sub-district, adopts multiuser detection on described Physical Resource Block the adjacent cell signal in the received signal to be detected.
9, system as claimed in claim 8 is characterized in that, described Physical Resource Block conflicting information acquiring unit comprises:
The Physical Resource Block information receiving unit is used to receive the fast information of physical resource that adopt the adjacent sub-district of sending adjacent sub-district;
The collision detection unit, Physical Resource Block and Target cell self Physical Resource Block that will distribute or that used that adopts by the adjacent sub-district that detect to receive conflicts and obtains the Physical Resource Block conflicting information.
10, system as claimed in claim 8 is characterized in that, described Physical Resource Block conflicting information acquiring unit comprises:
The Physical Resource Block information transmitting unit, be used to send comprise described with the physical resource block message that distributes to adjacent sub-district;
The conflicting information receiving element is used to receive the information that described Physical Resource Block conflicts.
11, a kind of interference blanking unit is characterized in that, comprising:
The configuration information acquiring unit is used to obtain the configuration information of adjacent sub-district; Described configuration information comprises the pilot tone and the scrambler of adjacent sub-district; The configuration information transmitting element is used to send the configuration information of described reception to the terminal that inserts;
Physical Resource Block conflicting information acquiring unit is used to obtain the physical resource block message that conflicts with adjacent sub-district;
Physical Resource Block conflicting information retransmission unit, the physical resource block message that conflicts with adjacent sub-district that is used for obtaining is transmitted to terminal.
12, device as claimed in claim 11 is characterized in that, described device is arranged in the base station at Target cell place.
13, a kind of terminal is characterized in that, comprising:
Adjacent community configured information receiving element is used to receive adjacent community configured information;
The Physical Resource Block information receiving unit is used for the physical resource block message that conflicts with adjacent sub-district in the receiving target sub-district;
The Interference Detection unit is used to utilize the configuration information of described adjacent sub-district, adopts multiuser detection on described Physical Resource Block the adjacent cell signal in the received signal to be detected.
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| CN102255840A (en) * | 2010-05-20 | 2011-11-23 | 中兴通讯股份有限公司 | Demodulation method and device |
| CN102264123A (en) * | 2010-05-26 | 2011-11-30 | 电信科学技术研究院 | Method and device for distributing PDSCH (physical downlink shared channel) power |
| WO2012031565A1 (en) * | 2010-09-10 | 2012-03-15 | 电信科学技术研究院 | Method, system and device for measuring interference |
| CN102573084A (en) * | 2010-12-31 | 2012-07-11 | 华为技术有限公司 | Interference processing method for control channel and devices |
| CN104935396A (en) * | 2014-03-20 | 2015-09-23 | 中兴通讯股份有限公司 | Signaling notification method and system for interference elimination or suppression, and receiving method and device |
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| US20050111408A1 (en) * | 2003-11-25 | 2005-05-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Selective interference cancellation |
| CN1881867A (en) * | 2005-06-17 | 2006-12-20 | 华为技术有限公司 | Method for eliminating interference between cells |
| CN101013915A (en) * | 2007-01-17 | 2007-08-08 | 倪明 | Method for eliminating co-channel interference TD-SCDMA system |
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