CN106535250A - Method and apparatus for suppressing long-range co-channel interference - Google Patents
Method and apparatus for suppressing long-range co-channel interference Download PDFInfo
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- CN106535250A CN106535250A CN201611003157.5A CN201611003157A CN106535250A CN 106535250 A CN106535250 A CN 106535250A CN 201611003157 A CN201611003157 A CN 201611003157A CN 106535250 A CN106535250 A CN 106535250A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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Abstract
The invention discloses a method and apparatus for suppressing long-range co-channel interference and relates to the technical field of communication. The method and apparatus solve a problem of low communication quality of a base station of a cell caused by long-distance co-channel interference. The method comprises the following steps: monitoring whether a first base station is subjected to long-distance co-channel interference; if yes, acquiring an interference symbolic number which is the number of symbols of the long-distance co-channel interference affecting the uplink signal of the first base station; and calculating interference protection distance based on the number of symbols of the guard interval time slot of the first base station, the interference symbolic number, and signal transmission speed; turning off the symbols, the same as the interference symbolic number, in the downlink signal of the second base station, wherein the second base station is a base station that communicates by using the same frequency band of the first base station within the interference protection distance of the first base station.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of suppressing method of remote co-channel interference and device.
Background technology
In LTE (Long Term Evolution, Long Term Evolution) system, multiple cells of areal may make
Communicated with identical frequency spectrum resource, wherein the signal of any one cell can be subject to using same spectrum resources and little with this
The co-channel interference of the signal of area's other cells closer to the distance.
In order to avoid cell is by the signal using same spectrum resources and other cells closer to the distance with the cell
Cell using same spectrum resources is often arranged apart from each other by co-channel interference.But due to " lower atmosphere waveguide " effect,
Remote co-channel interference occurs between distance cell farther out.Under the conditions of " lower atmosphere waveguide " is a kind of special climate
Effect of the air of formation to refraction of electromagnetic wave.Under " lower atmosphere waveguide " effect, electromagnetic wave can bypass ground level, realize
Over-the-horizon propagation.In the case where there is " lower atmosphere waveguide " effect, what the base station distant with this cell base station sent
High-power downstream signal can produce over-the-horizon propagation, be transferred to this cell base station, so as to disturb the up of this cell base station
Signal is received, and so as to generate remote co-channel interference, reduces the communication quality of cell base station.
The content of the invention
A kind of suppressing method of remote co-channel interference and device is embodiments provided, can suppress remote same
Frequency is disturbed, so as to improve the communication quality of the base station of cell.
In a first aspect, the embodiment of the present invention provides a kind of suppressing method of remote co-channel interference, including：Monitor the first base
Stand and whether be subject to remote co-channel interference；If first base station is subject to remote co-channel interference, acquisition to be disturbed symbolic number, by dry
Disturb the number that the upward signal that symbolic number is first base station is subject to the symbol of remote co-channel interference；According to the protection of first base station
The symbolic number of interval slots, symbolic number and signaling rate is disturbed, calculates interference interference protection distance；By the second base station
Downstream signal in be disturbed the equal number of symbol of symbolic number and close, the second base station is away from first base station interference protection distance
The base station communicated with first base station similar frequency bands by interior utilization.
With reference in a first aspect, in the first possibility of first aspect, the suppressing method of above-mentioned remote co-channel interference is also
Including：By in the downstream signal of first base station be disturbed the equal number of symbol of symbolic number and close.
With reference in a first aspect, in second possibility of first aspect, obtaining the step of being disturbed symbolic number includes：To
All symbols of the upward signal of one base station are sampled, and obtain the interference value of the sampled point of all symbols of upward signal；Will
Interference value more than interference threshold threshold value sampled point as being disturbed sampled point；According to the number for being disturbed sampled point and a symbol
Number sampled point number, calculate and be disturbed symbolic number.
With reference in a first aspect, first aspect the third may in, according to the symbol of the protection interval time slot of first base station
Count, be disturbed symbolic number and signaling rate, obtain interference protection apart from the step of include：According to signaling rate
It is calculated the corresponding signal transmission distance of symbol；The symbolic number for calculating protection interval time slot and the symbol for being disturbed symbolic number
Count sum；The corresponding signal transmission distance of calculated symbolic number sum is obtained, and as interference protection distance.
With reference in a first aspect, the 4th kind of first aspect may in, whether monitoring first base station is subject to remote with frequency
The step of interference, includes：The interference value for judging the corresponding at least part of symbol of upward signal of first base station whether push away with the time and
Move and decline；If the interference value of the corresponding at least part of symbol of the upward signal of first base station declines over time, judge
First base station is subject to remote co-channel interference.
With reference in a first aspect, the 5th kind of first aspect may in, whether monitoring first base station is subject to remote with frequency
The step of interference, includes：Judge first base station upward signal take Resource Block in the middle part of one or more Resource Block interference
Whether value is above the Resource Block of other parts；If one or more in the middle part of the Resource Block that the upward signal of first base station takes
The interference value of Resource Block is above other parts Resource Block, then judge that first base station is subject to remote co-channel interference.
Second aspect, the embodiment of the present invention provide a kind of restraining device of remote co-channel interference, including：Interference monitoring mould
Block, is configured to monitor whether first base station is subject to remote co-channel interference；Symbolic number acquisition module is disturbed, if being configured to
First base station is subject to remote co-channel interference, then obtain and be disturbed symbolic number, is disturbed the up letter that symbolic number is first base station
Number be subject to remote co-channel interference symbol number；Interference protection distance calculation module, is configured to according to first base station
The symbolic number of protection interval time slot, symbolic number and signaling rate is disturbed, calculates interference protection distance；First symbol is closed
Mold closing block, be configured to by the downstream signal of the second base station be disturbed the equal number of symbol of symbolic number and close, the second base
Station is the base station communicated with first base station similar frequency bands by the utilization in first base station interference protection distance.
With reference to second aspect, in the first possibility of second aspect, the restraining device of above-mentioned remote co-channel interference is also
Including：Second symbol closedown module, is configured in the downstream signal by first base station with to be disturbed symbolic number equal number of
Symbol is closed.
With reference to second aspect, in second possibility of second aspect, it is disturbed symbolic number acquisition module and is additionally configured to：
All symbols of the upward signal of first base station are sampled, the interference of the sampled point of all symbols of upward signal is obtained
Value；Using interference value more than interference threshold threshold value sampled point as being disturbed sampled point；According to be disturbed sampled point number and
The number of the sampled point of one symbol, calculates and is disturbed symbolic number.
With reference to second aspect, in the third possibility of second aspect, interference protection distance calculation module is additionally configured to：
The corresponding signal transmission distance of one symbol is calculated according to signaling rate；Calculate protection interval time slot symbolic number and
It is disturbed the symbolic number sum of symbolic number；Using calculated symbolic number sum corresponding signal transmission distance as interference protection
Distance.
With reference to second aspect, in the 4th kind of possibility of second aspect, interference monitoring module is additionally configured to：Judge first
Whether the interference value of the corresponding at least part of symbol of upward signal of base station declines over time；If first base station is up
The interference value of the corresponding at least part of symbol of signal declines over time, then judge that first base station is subject to remote dry with frequency
Disturb.
With reference to second aspect, in the 5th kind of possibility of second aspect, interference monitoring module is additionally configured to：Judge first
Whether the interference value of one or more Resource Block in the middle part of Resource Block that the upward signal of base station takes is above other parts
Resource Block；If the interference value of one or more Resource Block in the middle part of the Resource Block that the upward signal of first base station takes is above which
The Resource Block of his part, then judge that first base station is subject to remote co-channel interference.
The embodiment of the present invention provides a kind of suppressing method of remote co-channel interference and device, when first base station is subject to long distance
From co-channel interference when, the number of symbol of remote co-channel interference, protection interval are subject to according to the upward signal of first base station
Symbolic number and signaling rate, obtain interference protection distance, by the range of the interference protection of first base station distance
In downstream signal in second base station be disturbed symbolic number identical symbol closing.First base station is subject to remote dry with frequency
Disturb, the upward signal of mainly first base station receives the interference of longer-distance other base stations, obtain the up of first base station
Signal is subject to the symbolic number of remote co-channel interference, by the second base station in the interference protection of first base station in the range of
In downstream signal be disturbed the equal number of symbol of symbolic number and close so that the second base station can produce remote to first base station
The downstream signal of co-channel interference is staggered in time domain with the upward signal of first base station, so as to inhibit the second base station to the first base
Stand produce remote co-channel interference.
Description of the drawings
From below in conjunction with the accompanying drawings to the present invention specific embodiment description in may be better understood the present invention wherein,
Same or analogous reference represents same or analogous feature.
Flow charts of the Fig. 1 for the suppressing method of the remote co-channel interference of one embodiment of the invention；
Fig. 2 is subject to the second base station same at a distance for the symbol of the time slot of the upward signal of the first base station of the embodiment of the present invention
The schematic diagram of frequency interference；
Flow charts of the Fig. 3 for the suppressing method of the remote co-channel interference in another embodiment of the present invention；
Flow charts of the Fig. 4 for the suppressing method of the remote co-channel interference in further embodiment of this invention；
Fig. 5 is the interference value of the corresponding symbol of upward signal and each symbol of first base station in the embodiment of the present invention
Schematic diagram；
Fig. 6 is the dry of the Resource Block and each Resource Block of the upward signal occupancy of first base station in the embodiment of the present invention
Disturb the schematic diagram of value；
Structural representations of the Fig. 7 for the restraining device of the remote co-channel interference of one embodiment of the invention；
Structural representations of the Fig. 8 for the restraining device of the remote co-channel interference in another embodiment of the present invention.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, it is proposed that many details, to provide complete understanding of the present invention.But, to those skilled in the art
It will be apparent that the present invention can be implemented in the case of some details in not needing these details.Below to implementing
The description of example is better understood to the present invention to provide just for the sake of the example by illustrating the present invention.The present invention is never limited
In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element,
Any modification, replacement and the improvement of part and algorithm.In the the accompanying drawings and the following description, known structure and skill is not shown
Art, to avoid causing unnecessary obscuring to the present invention.
The suppressing method and device of remote co-channel interference provided in an embodiment of the present invention is applied to it may happen that long distance
From multiple base stations of co-channel interference.Flow charts of the Fig. 1 for the suppressing method of the remote co-channel interference of one embodiment of the invention, such as
Shown in Fig. 1, the suppressing method of the remote co-channel interference of the embodiment of the present invention includes step 101- step 104.
In a step 101, monitor whether first base station is subject to remote co-channel interference.
Wherein, first base station is any one base station in the multiple base stations for possible occur remote co-channel interference.One
In individual example, whether monitoring first base station is subject to remote co-channel interference, if first base station is subject to remote co-channel interference, holds
Row step 102.In another example, monitor whether first base station is subject to remote co-channel interference, if first base station is not affected by far
Apart from co-channel interference, then signal dispatching method of the prior art is still adopted, and continues whether real-time monitoring first base station is received
To remote co-channel interference.
In a step 102, if first base station is subject to remote co-channel interference, acquisition to be disturbed symbolic number.
Wherein, the number that the upward signal that symbolic number is first base station is subject to the symbol of remote co-channel interference is disturbed,
Wherein, the corresponding time slot of upward signal includes that uplink pilot time slot and ascending time slot, uplink pilot time slot and ascending time slot are wrapped
Include multiple symbols.The multiple symbols of upward signal correspondence of first base station.In one example, it is subject to remote same in first base station
In the case that frequency is disturbed, the whole symbols in the corresponding symbol of upward signal of possible first base station are subject to remote dry with frequency
Disturb, it is also possible to which the partial symbols in the corresponding symbol of upward signal of first base station are subject to remote co-channel interference.In step 102
In, need to obtain the number for being disturbed symbol.
In step 103, according to the protection interval time slot of first base station symbolic number, it is disturbed symbolic number and signal is passed
Defeated speed, calculates interference protection distance.
Wherein, symbol is a kind of unit of time, thus a symbol binding signal transmission speed to should have one section it is fixed
Signal transmission distance.The guarantor for preventing other base stations from producing interference to first base station is provided with the subframe of the signal of first base station
Shield interval slots, but in the prior art although provided with protection interval time slot, due to the presence of " lower atmosphere waveguide " effect,
Protection interval time slot does not ensure that first base station is not disturbed by other base stations.Signaling rate refers to base station communication institute
The speed that the signal for utilizing is transmitted in media as well.In one example, according to the symbolic number of the protection interval of first base station and receive
To the symbolic number of interference, it may be determined that make first base station be subject to what the signal transmission of remote co-channel interference was needed to first base station
Distance, that is to say, that, it may be determined that the first base of base station distance belonging to the signal of remote co-channel interference is produced to first base station
The distance stood.In one example, it is below step to produce the base station belonging to the signal of remote co-channel interference to first base station
The second base station in 104, to first base station produce remote co-channel interference signal belonging to base station distance first base station away from
With a distance from for interference protection, it may also be said to, the signal transmission for producing remote co-channel interference to first base station is needed to first base station
The distance wanted is interference protection distance.
At step 104, by the downstream signal of the second base station be disturbed the equal number of symbol of symbolic number and close.
Wherein, the second base station be away from first base station interference protection distance in utilization led to first base station similar frequency bands
The base station of letter.In one example, the number of the second base station can be one, or multiple, here is not limited.One
In individual example, first base station is by up letter of the downstream signal to first base station that remote co-channel interference is due to the second base station
Interference number is generated, therefore the upward signal of first base station is subject to the symbolic number of remote co-channel interference descending with the second base station
Signal brings the symbolic number of remote co-channel interference identical for the upward signal of first base station, and then will be descending in the second base station
In signal be disturbed the equal number of symbol of symbolic number and close, the downstream signal of the second base station can be avoided to first base station
Upward signal produces the symbol of remote co-channel interference to be continued to produce remote co-channel interference.It should be noted that closing second
Can be by manually performing or by long distance with the operation for being disturbed the equal number of symbol of symbolic number in downstream signal in base station
Send closing control instruction to perform from co-channel interference restraining device.Using the suppression of the remote co-channel interference of the embodiment of the present invention
Method processed, ensure that the second base station in interference protection distance will not produce remote co-channel interference to first base station, and dry
Disturb guard space larger, such as, 556km can be reached.
Used as an example, Fig. 2 is subject to for the symbol of the time slot of the upward signal of the first base station of the embodiment of the present invention
The schematic diagram of two base station remote co-channel interferences.As shown in Fig. 2 the corresponding time slot of the upward signal of first base station includes up leading
Frequency time slot and ascending time slot, the corresponding time slot of downstream signal of the second base station include descending time slot and descending pilot frequency time slot.Need
Illustrate, the descending time slot, descending pilot frequency time slot, protection interval time slot, uplink pilot time slot and ascending time slot in Fig. 2 is wrapped
Containing multiple symbols.As shown in Fig. 2 the symbol and part descending pilot frequency time slot of the corresponding descending time slot of the interference region of the second base station
Middle symbol, causes to the symbol of the corresponding uplink pilot time slot in disturbed region and the symbol of part ascending time slot of first base station
Remote co-channel interference.Therefore, method according to embodiments of the present invention, can will be the interference region of the second base station corresponding under
In the symbol and part descending pilot frequency time slot of row time slot, symbol is closed, to suppress the second base station to the remote with frequency of first base station
Interference.
The suppressing method of the remote co-channel interference for providing according to embodiments of the present invention, when first base station is subject to remote same
When frequency is disturbed, number, the symbol of protection interval of the symbol of remote co-channel interference is subject to according to the upward signal of first base station
Number and signaling rate, obtain interference protection distance, so as to by the range of the interference protection of first base station distance
In downstream signal in second base station be disturbed symbolic number identical symbol closing, to suppress the second base station to first base station
Remote co-channel interference.In other words, first base station is subject to remote co-channel interference, the upward signal of mainly first base station to be subject to
The interference of longer-distance other base stations, the upward signal for obtaining first base station are subject to the symbolic number of remote co-channel interference,
By the number identical with symbolic number is disturbed in the downstream signal of the second base station in the range of the interference protection of first base station distance
Purpose symbol is closed so that the second base station can produce the downstream signal of remote co-channel interference and first base station to first base station
Upward signal staggers in time domain, so as to the remote co-channel interference for inhibiting the second base station to produce first base station.
Flow charts of the Fig. 3 for the suppressing method of the remote co-channel interference in another embodiment of the present invention, the step shown in Fig. 3
Rapid 101- steps 104 are essentially identical with 101- steps 104 the step of the suppressing method of remote co-channel interference shown in Fig. 1.It is different
Part is that the suppressing method of the remote co-channel interference shown in Fig. 3 may also include step 105.
In step 105, by the downstream signal of first base station be disturbed the equal number of symbol of symbolic number and close.
As " lower atmosphere waveguide " effect has reciprocity, that is to say, that first base station is subject to the long distance of the second base station
From co-channel interference, after some time, the second base station can also be subject to the remote co-channel interference of first base station.Above-mentioned steps
Although in 104 downstream signals for closing the second base station and being disturbed the equal number of symbol of symbolic number, the second base station is eliminated
Remote co-channel interference to first base station, but first base station is also possible that producing the remote same frequency to the second base station does
Disturb.Therefore when judging that first base station is subject to the remote co-channel interference of the second base station, in addition it is also necessary to by the descending letter of first base station
In number be disturbed the equal number of symbol of symbolic number and close, it is to avoid remote co-channel interference of the first base station to the second base station.
It should be noted that step 105 can be performed simultaneously with step 104, to ensure more thoroughly avoid the first base
Stand and the second base station remote co-channel interference each other.
The embodiment of the present invention can also suppress even to eliminate remote co-channel interference of the first base station to the second base station, it is ensured that
First base station and the second base station remote co-channel interference each other is avoided more thoroughly.
Flow charts of the Fig. 4 for the suppressing method of the remote co-channel interference in further embodiment of this invention, the step shown in Fig. 4
Rapid 101 and step 104 it is essentially identical with the step of the suppressing method of remote co-channel interference shown in Fig. 1 101 and step 104.No
It is that 1021- steps 1023 are step in the suppressing method of the remote co-channel interference of Fig. 1 the step of shown in Fig. 4 with part
102 concrete refinement, 1031- steps 1033 are for walking in the suppressing method of the remote co-channel interference of Fig. 1 the step of shown in Fig. 4
Rapid 103 concrete refinement.
In step 1021, all symbols of the upward signal of first base station are sampled, obtain the institute of upward signal
There is the interference value of the sampled point of symbol.
Wherein, the sample frequency sampled for all symbols of the upward signal of first base station can be consistent,
That is, the number of the sampled point for obtaining that carries out sampling to each symbol is identical.Obtain the sampling of all symbols of upward signal
The interference value of point, is that step 1022 determines that interference sample point is prepared.
In step 1022, using interference value more than interference threshold threshold value sampled point as being disturbed sampled point.
Wherein, interference threshold threshold value is whether sampled point is the cut off value for being disturbed sampled point, and interference value is more than interference door
The sampled point of limit threshold value is to be disturbed sampled point.
In step 1023, according to the number for being disturbed sampled point and the number of the sampled point of a symbol, calculate and receive
Interference symbolic number.
Wherein, all symbols of the upward signal of first base station are sampled in above-mentioned steps, each symbol is carried out
The number of the sampled point that sampling is obtained is identical, obtains the number of the wherein sampled point of any one symbol, and calculating is disturbed symbol
Number.Specifically, the number for being disturbed sampled point can be rounded up with the ratio of the number of the sampled point of a symbol, is received
Interference symbolic number.Specifically can be calculated by below equation and be disturbed symbolic number：
Wherein, n is to be disturbed symbolic number, n1For being disturbed the number of sampled point, n2For the number of the sampled point of a symbol
Mesh.
In step 1031, the corresponding distance of symbol is calculated according to signaling rate.
Wherein, signaling rate is the transmission speed of signal that first base station and the second base station send, and the signal can be with
It is upward signal, or downstream signal, here is not limited.Symbol is time slice extremely short in time domain, therefore basis
Signaling rate can obtain the corresponding signal transmission distance of symbol.Specifically, can be calculated according to below equation
To the corresponding signal transmission distance of symbol：
s1=v × t1 (2)
Wherein, s1For the corresponding signal transmission distance of symbol, v is signaling rate, t1For a symbol when
It is long.
In step 1032, symbolic number and the symbolic number sum for being disturbed symbolic number of calculating protection interval time slot.
Wherein, protection interval time slot is to disturb the time slot for arranging in order to avoid signal.
In step 1033, the corresponding signal transmission distance of calculated symbolic number sum is obtained, and is protected as interference
Shield distance.
Wherein, in above-mentioned steps 1031 it has been found that the corresponding signal transmission distance of symbol, according to protection interval
The symbolic number of time slot and the symbolic number sum for being disturbed symbolic number, can be calculated signal corresponding with the symbolic number sum and pass
Defeated distance, and will signal transmission distance corresponding with the symbolic number sum as interference protection distance, protect away from first base station interference
Base station in shield distance is possible to produce remote co-channel interference to first base station.Specifically, can be according to below equation meter
Calculate interference protection distance：
sp=s1×(nGP+n) (3)
Wherein, spFor interference protection distance, s1For the corresponding signal transmission distance of symbol, nGpFor protection interval time slot
Symbolic number, n is for being disturbed symbolic number.
The embodiment in an actual implementation process is described below.As the signal that base station sends can be believed for electromagnetic wave
Number, the spread speed of electromagnetic wave signal can regard the light velocity as, therefore signal transmission speed 299792.458km/s, a symbol
Shi Changwei 1/14ms, can be calculated the corresponding signal transmission distance of symbol according to above-mentioned formula (2) and be about 21.4km；
The number for arranging the sampled point of a symbol is 2048, and interference threshold threshold value is -100dB, and interference value is more than -100dB by dry
The number for disturbing sampled point is 12300, then can be calculated according to above-mentioned formula (1) and be disturbed symbolic number for 6；Arrange between protection
It is 9 every the symbolic number of time slot, then it is 321km that can be calculated interference protection distance according to above-mentioned formula (3)；Then need by away from
9 symbols in the downstream signal of the base station communicated with first base station similar frequency bands by the utilization in first base station 321km
Close.
In one more embodiment of the present invention, the step 101 in the suppressing method of the remote co-channel interference shown in Fig. 1
It can be following any one mode that whether monitoring first base station is subject to the mode of remote co-channel interference.
In first method, in time domain, the interference of the corresponding at least part of symbol of upward signal of first base station is judged
Whether value declines over time；If the interference value of the corresponding at least part of symbol of the upward signal of first base station was pushed away with the time
Move and decline, then can determine that first base station is subject to remote co-channel interference；If the corresponding at least portion of the upward signal of first base station
Divide the interference value of symbol without declining over time, then can determine that first base station is subject to remote co-channel interference.
Such as, Fig. 5 is the dry of the corresponding symbol of upward signal and each symbol of first base station in the embodiment of the present invention
The schematic diagram of value is disturbed, wherein abscissa is symbol, and vertical coordinate is interference value, and interference value unit is dB.Can be obtained by Fig. 5, in symbol
For 0 to 25000 or so, with the growth of symbol, interference value is on a declining curve；As symbol is the unit in time slot, symbol
Increase express time growth passage, that is to say, that symbol be 0 to 25000 or so interval in, upward signal it is corresponding
The interference value of symbol declines over time, it is possible to determine that first base station is subject to remote co-channel interference.
In second method, on frequency domain, judge first base station upward signal take Resource Block in the middle part of one or
Whether the interference value of multiple Resource Block is above the Resource Block of other parts；If the Resource Block that the upward signal of first base station takes
The interference value of multiple Resource Block at middle part is above the Resource Block of other parts, then judge that first base station is subject to remote dry with frequency
Disturb.It should be noted that the Resource Block of other parts removes middle part in referring to the Resource Block that the upward signal of first base station takes
Other Resource Block beyond one or more Resource Block.As " lower atmosphere waveguide " effect time of occurrence concentrates on morning 1:00
To the morning 9:Between 00, and there is the area that scope concentrates on population more rareness, now number of users and portfolio are not located in
Busy period, except the Resource Block of master sync signal occupancy and the Resource Block of auxiliary synchronous signals occupancy are in lasting transmission signal, its
The Resource Block that remaining business takes is substantially at idle condition.The Resource Block that master sync signal and auxiliary synchronous signals take is located at up
The centre position of the Resource Block that signal takes, can be more in the middle part of the Resource Block that the upward signal of first base station takes by monitoring
Whether the interference value of individual Resource Block is above the Resource Block of other parts, judges whether first base station is subject to remote dry with frequency
Disturb.
Such as, Fig. 6 is the Resource Block and each Resource Block that the upward signal of first base station in the embodiment of the present invention takes
Interference value schematic diagram, wherein, abscissa is Resource Block, and vertical coordinate is interference value, and the unit of interference value is dB.Such as Fig. 6
Shown, the interference value of 6 Resource Block in the middle of 100 Resource Block (abbreviation RB) that upward signal takes is than other Resource Block
Strong 5～the 7dB of interference value, then can be determined that first base station is subject to remote co-channel interference.
It should be noted that the monitoring first base station of step 101 whether be subject to the mode of remote co-channel interference include but
Above two mode is not limited to, other can monitor whether first base station is subject to the mode of remote co-channel interference also in the present invention
In the protection domain of embodiment.
Structural representations of the Fig. 7 for the restraining device of the remote co-channel interference of one embodiment of the invention, as shown in fig. 7,
The restraining device 200 of the remote co-channel interference of the embodiment of the present invention includes interference monitoring module 201, is disturbed symbolic number acquisition
Module 202, interference protection distance calculation module 203 and the first symbol closedown module 204.
Interference monitoring module 201, is configured to monitor whether first base station is subject to remote co-channel interference.
Symbolic number acquisition module 202 is disturbed, if first base station is configured to by remote co-channel interference, acquisition is received
Interference symbolic number, is disturbed the number that the upward signal that symbolic number is first base station is subject to the symbol of remote co-channel interference.
Interference protection distance calculation module 203, is configured to the symbolic number of the protection interval time slot according to first base station, receives
Interference symbolic number and signaling rate, calculate interference protection distance.
First symbol closedown module 204, be configured to by the downstream signal of the second base station with to be disturbed symbolic number identical
The symbol of number is closed, and the second base station is that the utilization in first base station interference protection distance is carried out with first base station similar frequency bands
The base station of communication.
The embodiment of the present invention provides a kind of restraining device of remote co-channel interference, when first base station is subject to remote with frequency
During interference, number, the symbolic number of protection interval of the symbol of remote co-channel interference is subject to according to the upward signal of first base station
And signaling rate, interference protection distance is obtained, by the second base in the interference protection of first base station in the range of
In the downstream signal stood be disturbed symbolic number identical symbol closing.First base station is subject to remote co-channel interference, mainly
It is that the upward signal of first base station receives the interference of longer-distance other base stations, the upward signal for obtaining first base station is subject to
The symbolic number of remote co-channel interference, by the downstream signal of the second base station in the interference protection of first base station in the range of
In be disturbed the equal number of symbol of symbolic number and close so that the second base station can produce remote co-channel interference to first base station
Downstream signal stagger in time domain with the upward signal of first base station, so as to inhibit what the second base station was produced to first base station
Remote co-channel interference.
Structural representations of the Fig. 8 for the restraining device of the remote co-channel interference in another embodiment of the present invention, shown in Fig. 8
Interference monitoring module 201, be disturbed symbolic number acquisition module 202, interference protection distance calculation module 203 and the first symbol and close
The interference monitoring module 201 of mold closing block 204 and the restraining device 200 of remote co-channel interference shown in Fig. 7, it is disturbed symbolic number and obtains
Delivery block 202, interference protection distance calculation module 203 and the first symbol closedown module 204 are essentially identical.Difference is,
The restraining device of the remote co-channel interference shown in Fig. 8 may also include the second symbol closedown module 205.
Second symbol closedown module 205, is configured in the downstream signal by first base station with to be disturbed symbolic number identical
The symbol of number is closed.
The embodiment of the present invention can also suppress even to eliminate remote co-channel interference of the first base station to the second base station, it is ensured that
First base station and the second base station remote co-channel interference each other is avoided more thoroughly.
Long distance in the restraining device 200 of remote co-channel interference in still another embodiment of the process and above-described embodiment
Restraining device 200 from co-channel interference is essentially identical, difference be disturbed symbolic number acquisition module 202 can be with quilt
Concrete configuration is：All symbols of the upward signal of first base station are sampled, all symbols for obtaining upward signal are adopted
The interference value of sampling point；Using interference value more than interference threshold threshold value sampled point as being disturbed sampled point；According to being disturbed sampling
The number of the sampled point of the number and a symbol of point, calculates and is disturbed symbolic number.Interference protection distance calculation module 203 is also
Can be specifically configured to：The corresponding signal transmission distance of one symbol is calculated according to signaling rate；It is calculated
The symbolic number of protection interval time slot and the symbolic number sum for being disturbed symbolic number；By calculated symbolic number sum corresponding letter
Number transmission range is used as interference protection distance.
Long distance in the restraining device 200 of remote co-channel interference in still another embodiment of the process and above-described embodiment
Restraining device 200 from co-channel interference is essentially identical, and difference is that interference monitoring module 201 can also be configured specifically
For：Judge whether the interference value of the corresponding at least part of symbol of upward signal of first base station declines over time；If the
The interference value of the corresponding at least part of symbol of upward signal of one base station declines over time, then judge that first base station is subject to
Remote co-channel interference.Or, interference monitoring module 201 is additionally configured to：Judge the money that the upward signal of first base station takes
Whether the interference value of one or more Resource Block in the middle part of source block is above the Resource Block of other parts；If first base station is up
The interference value of one or more Resource Block in the middle part of Resource Block that signal takes is above the Resource Block of other parts, then judge the
One base station is subject to remote co-channel interference.
Functional module shown in structures described above schematic diagram can be implemented as hardware, software, firmware or they
Combination.When realizing in hardware, its may, for example, be electronic circuit, special IC (ASIC), appropriate firmware,
Plug-in unit, function card etc..When being realized with software mode, the element of the present invention be used to perform the program of required task or
Code segment.Program or code segment can be stored in machine readable media, or are existed by the data signal carried in carrier wave
Transmission medium or communication links send." machine readable media " can include can store or transmission information any Jie
Matter.The example of machine readable media include electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM),
Floppy disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can be via such as the Internet, interior
The computer network of networking etc. is downloaded.
The invention is not limited in particular step that is described above and illustrating in figure and structure.Also, in order to simple and clear
For the sake of, the detailed description to known method technology is omitted here.For example, in the above-described embodiments, some tools have been described and illustrated
The step of body, is as an example.But, method of the present invention process is not limited to described and illustrated concrete steps, this area
Technical staff after the spirit for understanding the present invention can make various changes, modification and addition, or change between step
Sequentially.
Claims (12)
1. a kind of suppressing method of remote co-channel interference, including：
Whether monitoring first base station is subject to remote co-channel interference；
If the first base station is subject to remote co-channel interference, acquisition is disturbed symbolic number, described to be disturbed symbolic number for institute
State the number of the upward signal by the symbol of remote co-channel interference of first base station；
Symbolic number according to the protection interval time slot of the first base station, it is described be disturbed symbolic number and signaling rate,
Calculate interference protection distance；
To close with the equal number of symbol of symbolic number that is disturbed in the downstream signal of the second base station, second base station is
The base station communicated with the first base station similar frequency bands by utilization in first base station interference protection distance.
2. suppressing method according to claim 1, also includes：
To close with the equal number of symbol of symbolic number that is disturbed in the downstream signal of the first base station.
3. suppressing method according to claim 1, it is wherein, described to obtain the step of being disturbed symbolic number and include：
All symbols of the upward signal of the first base station are sampled, all symbols of the upward signal are obtained
Sampled point interference value；
Using interference value more than interference threshold threshold value sampled point as being disturbed sampled point；
According to the number for being disturbed sampled point and the number of the sampled point of a symbol, calculate and described be disturbed symbol
Number.
4. suppressing method according to claim 1, wherein, according to the symbol of the protection interval time slot of the first base station
It is several, described to be disturbed symbolic number and signaling rate, obtain interference protection apart from the step of include：
The corresponding signal transmission distance of one symbol is calculated according to signaling rate；
Calculate the symbolic number of the protection interval time slot and the symbolic number sum for being disturbed symbolic number；
The corresponding signal transmission distance of the calculated symbolic number sum is obtained, and as the interference protection distance.
5. suppressing method according to claim 1, wherein, described to monitor whether first base station is subject to remote co-channel interference
The step of include：
Judge whether the interference value of the corresponding at least part of symbol of upward signal of the first base station declines over time；
If the interference value of the corresponding at least part of symbol of the upward signal of the first base station declines over time, judge
The first base station is subject to remote co-channel interference.
6. suppressing method according to claim 1, wherein, described to monitor whether first base station is subject to remote co-channel interference
The step of include：
Whether judge the interference value of one or more Resource Block in the middle part of Resource Block that the upward signal of the first base station takes
It is above the Resource Block of other parts；
If the interference value of one or more Resource Block in the middle part of the Resource Block that the upward signal of the first base station takes is above
The Resource Block of other parts, then judge that the first base station is subject to remote co-channel interference.
7. a kind of restraining device of remote co-channel interference, including：
Interference monitoring module, is configured to monitor whether first base station is subject to remote co-channel interference；
Symbolic number acquisition module is disturbed, if the first base station is configured to by remote co-channel interference, is obtained by dry
Symbolic number is disturbed, it is described to be disturbed the number that the upward signal that symbolic number is the first base station is subject to the symbol of remote co-channel interference
Mesh；
Interference protection distance calculation module, is configured to the symbolic number of protection interval time slot according to the first base station, described
Symbolic number and signaling rate is disturbed, interference protection distance is calculated；
First symbol closedown module, is configured to be disturbed symbolic number same number with described in the downstream signal of the second base station
Symbol close, second base station be away from the first base station interference protection distance in utilization it is identical with the first base station
The base station communicated by frequency range.
8. restraining device according to claim 7, also includes：
Second symbol closedown module, be configured to by the downstream signal of the first base station with described to be disturbed symbolic number identical
The symbol of number is closed.
9. restraining device according to claim 7, wherein, the symbolic number acquisition module that is disturbed is additionally configured to：
All symbols of the upward signal of the first base station are sampled, all symbols of the upward signal are obtained
Sampled point interference value；
Using interference value more than interference threshold threshold value sampled point as being disturbed sampled point；
According to the number for being disturbed sampled point and the number of the sampled point of a symbol, calculate and described be disturbed symbol
Number.
10. restraining device according to claim 7, wherein, the interference protection distance calculation module is additionally configured to：
The corresponding signal transmission distance of one symbol is calculated according to signaling rate；
Calculate the symbolic number of the protection interval time slot and the symbolic number sum for being disturbed symbolic number；
The corresponding signal transmission distance of the calculated symbolic number sum is obtained, and as the interference protection distance.
11. restraining devices according to claim 7, wherein, the interference monitoring module is additionally configured to：
Judge whether the interference value of the corresponding at least part of symbol of upward signal of the first base station declines over time；
If the interference value of the corresponding at least part of symbol of the upward signal of the first base station declines over time, judge
The first base station is subject to remote co-channel interference.
12. restraining devices according to claim 7, wherein, the interference monitoring module is additionally configured to：
Whether judge the interference value of one or more Resource Block in the middle part of Resource Block that the upward signal of the first base station takes
It is above the Resource Block of other parts；
If the interference value of one or more Resource Block in the middle part of the Resource Block that the upward signal of the first base station takes is above
The Resource Block of other parts, then judge that the first base station is subject to remote co-channel interference.
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