CN104753560B - A kind of anti-arrowband interference method, eNodeB and communication system - Google Patents
A kind of anti-arrowband interference method, eNodeB and communication system Download PDFInfo
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- CN104753560B CN104753560B CN201310732438.4A CN201310732438A CN104753560B CN 104753560 B CN104753560 B CN 104753560B CN 201310732438 A CN201310732438 A CN 201310732438A CN 104753560 B CN104753560 B CN 104753560B
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Abstract
The present invention relates to the communications field, discloses a kind of anti-arrowband interference method, eNodeB and communication system, can resist interference of the arrowband interference to synchronizing channel and PBCH channels.The anti-arrowband interference method includes：When the interference band where narrowband intermediate frequency point and center of housing estate frequency range have common factor, new center of housing estate frequency range is searched in cell frequency range, wherein, the center of housing estate frequency range is the frequency range where the air-link resources RB of cell；Synchronizing information is generated according to the center frequency point of the new center of housing estate frequency range；The synchronizing information is sent to terminal, synchronized for terminal according to the synchronizing information.The anti-arrowband interference method is used for synchronizing channel and PBCH channels resistance arrowband interference.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of anti-arrowband interference method, eNodeB（Evolved Node B,
Evolution base station）And communication system.
Background technology
LTE (Long Term Evolution, Long Term Evolution) technologies coordinate high spectrum utilization simultaneously using big bandwidth
Rate so that advantages of the LTE on service rate is fairly obvious.LTE technologies include TDD (Time Division Duplexing,
Time division duplex) and two kinds of dual-modes of FDD (Frequency Division Duplexing, FDD), it is expressed as
TDD-LTE and FDD-LTE.
Cell in LTE communication system has the bandwidth to be differed in size from 1.4M~20M, the synchronizing channel and PBCH of cell
（Physics Broadcast Channel, Physical Broadcast Channel）Concentrate 6 RB for being mapped in bandwidth center shared by cell
In (Radio Bear, Radio Link carrying) resource, corresponding frequency range position is（FC- 0.54MHz~FC+0.54MHz）.Typically
Ground, for a broadband system, if the interference of arrowband around the broadband be present, part will be caused the arrowband of interference to be present
Can not normal bearer service, cause the hydraulic performance decline of whole system.LTE technologies to the resource of up-downgoing traffic assignments by carrying out
Dynamic is adjusted to overcome the interference of the arrowband.But when arrowband interference is exactly at the center frequency point of LTE cells, it is synchronous
Channel and PBCH are possible to be disturbed.Due to synchronizing channel and PBCH can not as Traffic Channel by dynamic adjustment come gram
The interference of the arrowband is taken, therefore when synchronizing channel and PBCH disturbed, terminal can be caused can not to complete the synchronization to the cell
And all terminals can not be accessed in the cell., can be because cell A when cell A is certain cell B adjacent area
Cell B None- identified cell A can not synchronously be caused with cell B, and then the terminal on periphery, in moving process, network can not allow
Terminal is switched on cell A.If network is the TDD-LTE of identical networking, the arrowband interference of center frequency point will influence
Whole LTE network.Therefore, anti-Narrow Band Interference of the prior art is limited that can not resist arrowband interference pair
The interference of synchronizing channel and PBCH channels.
The content of the invention
It is an object of the invention to provide a kind of anti-arrowband interference method, eNodeB and communication system, it is narrow that this can be resisted
Interference with interference to synchronizing channel and PBCH channels.
In order to solve the above technical problems, embodiments of the present invention provide a kind of anti-arrowband interference method, applied to drilling
Enter base station eNodeB, including：
When interference band and the center of housing estate frequency range where arrowband interference have common factor, found in cell frequency range new small
District center frequency range, wherein, the center of housing estate frequency range is the frequency range where the air-link resources RB of cell；
Synchronizing information is generated according to the center frequency point of the new center of housing estate frequency range；
The synchronizing information is sent to terminal, synchronized for terminal according to the synchronizing information.
Embodiments of the present invention provide a kind of eNodeB, including：
Searching unit, when having common factor with center of housing estate frequency range for the interference band where being disturbed when arrowband, in cell frequency
New center of housing estate frequency range is found in section, wherein, the center of housing estate frequency range is the frequency where the air-link resources RB of cell
Section；
Processing unit, for generating synchronizing information according to the center frequency point of the new center of housing estate frequency range；
Transmitting element, for the synchronizing information to be sent into terminal, synchronized for terminal according to the synchronizing information.
Embodiments of the present invention additionally provide a kind of anti-arrowband interference method, applied to terminal, including：
Receive the synchronizing information that evolution base station eNodeB is sent；
Synchronizing signal and △ F in the synchronizing informationC, the center frequency point of calculating cell frequency range；Wherein, the △
FCCenter frequency point for center of housing estate frequency range and the frequency offset between the center frequency point of cell frequency range, the center of housing estate frequency
Section is the frequency range where the air-link resources RB of cell；
Use the center frequency point processing business of the cell frequency range.
Embodiments of the present invention additionally provide a kind of terminal, including：
Receiving unit, for receiving the synchronizing information of evolution base station eNodeB transmissions；
Computing unit, for the synchronizing signal in the synchronizing information and △ FC, calculate the center of cell frequency range frequently
Point；Wherein, the △ FCCenter frequency point for center of housing estate frequency range and the frequency offset between the center frequency point of cell frequency range,
The center of housing estate frequency range is the frequency range where the air-link resources RB of cell；
Processing unit, for the center frequency point processing business using the cell frequency range.
The present invention also provides a kind of communication system, including：
Above-described eNodeB and above-described terminal.
Embodiment of the present invention in terms of existing technologies, when arrowband interference effect is into the cell where synchronizing signal
During heart frequency range, one section of new center of housing estate frequency range is searched in cell frequency range, according to the center of the new center of housing estate frequency range
Frequency generates synchronizing information；The synchronizing information is sent to terminal, disturbed for terminal according to new in synchronizing information without arrowband
The center frequency point of center of housing estate frequency range synchronize.This method can resist the interference of synchronizing channel and PBCH channels.
In addition, it is described new center of housing estate frequency range is found in cell frequency range before, methods described also includes：
The narrow signal intensity with intermediate-frequeney point and the size of default interference threshold；
When the signal intensity that continuous N number of frequency in the arrowband be present is more than default interference threshold, by N number of frequency
The frequency range that point is formed is as the interference band, and described is the integer that N is more than or equal to 2, and the interference band is that arrowband disturbs
The interference band at place.
By the narrow signal intensity with intermediate-frequeney point and the size of default interference threshold, interference band can be obtained.
New center of housing estate frequency range is found in cell frequency range specifically include following steps in addition, described:A, described small
In area's band limits, noiseless frequency range set is searched, the noiseless frequency range set with the interference band by not having what is occured simultaneously
Multiple noiseless frequency range compositions；B, searching belt is wider than Radio Link carrying bandwidth BW in the noiseless frequency range set6RB's
First noiseless frequency range；C, the center frequency point F of the first noiseless frequency range is foundC_NEW, the FC_NEW=FC+ M*100, the M
To meet 75>(M*100)%90>15 integer.
By searching, it will meet that band is wider than BW6RB, and center frequency point FC_NEWMeet FC_NEW=FCThe first of+M*100 is without dry
Section is scrambled as new center of housing estate frequency range, the biography of signal on signal and PBCH is synchronized using new center of housing estate frequency range
Broadcast.
In addition, described include according to the center frequency point of new center of housing estate frequency range generation synchronizing information：According to described
The center frequency point generation synchronizing signal of new center of housing estate frequency range；Generated according to the center frequency point of the new center of housing estate frequency range
Management information block MIB, the byte of padding spare in the MIB calculate △ FC, the △ FCFor the new center of housing estate
Frequency offset between the center frequency point of the center frequency point of frequency range and new cell frequency range.
By using the center frequency point F of new center of housing estate frequency rangeC_NEWSynchronizing signal and MIB are generated, according in MIB
Spare obtains △ FC。
In addition, in the spare, the 0th bit bit positions are sign bit, and 1bit positions to 7bit positions are data bit, the
8bit positions and 9bit positions are reserved place.
By defining spare 10 bit positions, using spare 1bit positions to 7bit positions as data bit, so as to obtain
To △ FC。
In addition, methods described also includes：By the FC_NEWIt is added in the Neighboring Cell List of the cell of the eNodeB management.
So that the terminal of other cells also can measure interfered cell by nearby region measurement.
Brief description of the drawings
Fig. 1 is the anti-arrowband interference method schematic flow sheet of first embodiment of the invention；
Fig. 2 is the frequency spectrum and arrowband interference schematic diagram of the LTE cells of first embodiment of the invention；
Fig. 3 is the method flow schematic diagram of the new center of housing estate frequency range of the lookup of first embodiment of the invention；
Fig. 4 is the anti-arrowband interference method schematic flow sheet of second embodiment of the invention；
Fig. 5 is the anti-arrowband interference method schematic flow sheet of third embodiment of the invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, each reality below in conjunction with accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order that reader more fully understands the application and proposes many ins and outs.But even if without these ins and outs and base
Many variations and modification in following embodiment, each claim of the application technical side claimed can also be realized
Case.
First embodiment of the invention provides a kind of anti-arrowband interference method, applied to eNodeB, the anti-arrowband disturber
The problem of method can be solved when LTE cell synchronous signal and PBCH are flooded by arrowband interference, and the LTE cells can not use.Such as
Shown in Fig. 1, the anti-arrowband interference method comprises the following steps：
101st, the interference band in cell frequency range is obtained.
As shown in Fig. 2 Fig. 2 is the frequency spectrum of cell and the schematic diagram of arrowband interference, transverse axis represents the frequency f that cell uses,
The longitudinal axis represents the signal intensity of each frequency.Assuming that the frequency range of LTE cell operations is cell frequency range, it is denoted as（F1~F2）, cell frequency
Section is with FCCentered on frequency, using BW as bandwidth, in the lte networks, eNodeB can the moment network quality is measured.Door in figure
Limit R is default interference threshold.When arrowband interference be present into the cell frequency range in systematic survey, the narrow letter with intermediate-frequeney point
Number intensity and the size of default interference threshold, the signal intensity of arrowband interference m1, m2 and m3 intermediate-frequeney point are S1, S3 and S2,
More than thresholding R, then cell frequency range can be divided into multiple interference bands and multiple noiseless frequency ranges by thresholding R.When being deposited in arrowband
When the signal intensity of continuous N number of frequency is more than default interference threshold, using the frequency range that N number of frequency is formed as the interference frequency
Section, the interference band are the interference band where arrowband interference, and the N is the integer more than or equal to 2.The plurality of interference frequency
Section is more than frequency range corresponding to the frequency of default interference threshold for the signal intensity of arrowband frequency, and the plurality of noiseless frequency range is narrow
Signal intensity with frequency is less than or equal in frequency range corresponding to the frequency of default interference threshold or cell frequency range without arrowband
The frequency range of interference.In Fig. 2, the frequency range where m1, m2 and m3 is the interference band of the LTE cells, and n1, n2, n3 and n4 are without dry
Scramble section.
When the signal intensity of narrowband intermediate frequency point is less than or equal to default interference threshold, it is believed that the shadow of the interference of the frequency
Very little is rung, can not have to consider influence of the interference to cell communication.
Whether the interference band and center of housing estate frequency range for the 102, judging arrowband interference place have common factor.
Center of housing estate frequency range can be the frequency range where 6 air-link resources RB of cell, usually, the center of housing estate
Frequency range is（FC- 0.54MHz~FC+0.54MHz）.By the interference band where arrowband interference compared with center of housing estate frequency range,
Judge interference band m1, m2 and the m3 and center of housing estate frequency range at arrowband interference place（FC- 0.54MHz~FC+0.54MHz）Whether
There is common factor.When the interference band where narrowband intermediate frequency point and center of housing estate frequency range have common factor, step 103 is performed.Assuming that m2 and
M3 has common factor with center of housing estate frequency range, then the LTE cell synchronous signal and PBCH have been flooded in task arrowband interference.
103rd, when the interference band where narrowband intermediate frequency point and center of housing estate frequency range have common factor, found in cell frequency range
New center of housing estate frequency range.
New center of housing estate frequency range be and frequency range of the interference band without common factor.
As shown in figure 3, the step 103 specifically includes following sub-step：
1031st, in cell band limits, search does not have the noiseless frequency range set occured simultaneously with interference band.
Multiple noiseless frequency range n1, n2, n3 and the n4 obtained in finding step 101, the plurality of noiseless frequency range composition
Noiseless frequency range set（FAVAILABLE_LOW_N~FAVAILABLE_HIGH_N）.Multiple noiseless frequency ranges in frequency range set that this is noiseless
Can be expressed as（Favailable_low_1~Favailable_high_1）,（Favailable_low_2~Favailable_high_2）... ...,
（Favailable_low_n~Favailable_high_n）}.
1032nd, band is searched in noiseless frequency range set and is wider than Radio Link carrying bandwidth BW6RBThe first noiseless frequency
Section.
The bandwidth of each interference band in multiple noiseless frequency range set is obtained first, obtains multiple noiseless frequency range set
In the method for bandwidth of each interference band be to ask the difference of highest frequency and low-limit frequency in each noiseless frequency range, example
, the bandwidth BW of noiseless frequency rangeAVAILABLE_N=（FAVAILABLE_HIGH_N-FAVAILABLE_LOW_N）.
Then Radio Link carrying bandwidth BW is compared6RBWith the size of the bandwidth of multiple noiseless frequency ranges, find out band and be wider than
BW6RBNoiseless frequency range.Band is wider than BW6RBNoiseless frequency range be referred to as the first noiseless frequency range.The first noiseless frequency
Section can be multiple.
1033rd, the center frequency point F of new center of housing estate frequency range is searched in the first noiseless frequency rangeC_NEW。
The first noiseless frequency range（FAVAILABLE_LOW_N+BW6RB/2）~（FAVAILABLE_HIGH_N-BW6RB/2）In the range of
Search the center frequency point F of new center of housing estate frequency rangeC_NEW, i.e. FC_NEWFor the new center frequency point of frequency range where 6 RB of cell.
The F simultaneouslyC_NEWAlso meet FC_NEW=（FC+M*100）, wherein, FCFor the center frequency point of the cell frequency range, M is satisfaction 75>
(M*100)%90>15 integer.FC_NEWIt can be multiple, select a F in practical application as neededC_NEWUsed.
104th, synchronizing information is generated according to the center frequency point of new center of housing estate frequency range.
Step 104 includes：According to the FC_NEWGenerate synchronizing signal.
Find the FC_NEWAfterwards, based on this FC_NEWCarry out PSS simultaneously（Primary synchronization sequence,
Main synchronizing sequence）And SSS（Auxiliary synchronization sequence, secondary synchronization sequences）The propagation of signal, base
In FC_NEWThe synchronizing signal of generation and in FCThe synchronizing signal of upper propagation is completely the same.
Step 104 also includes：According to FC_NEWManagement information block MIB is generated, the byte of padding spare in MIB is calculated
△FC, △ FCFor FC_NEWWith the frequency offset between center frequency point new in cell frequency range.
When generating synchronizing signal, while it can also be based on FC_NEWRegenerate MIB (Master Information
Block, management information block), in the FC_NEWOn corresponding PBCH channels, MIB is propagated, the mib information regenerated is denoted as MIB_
FC_NEWInformation, in FCThe mib information of upper propagation is denoted as MIB_FC, MIB_FC_NEWAnd MIB_FCIt is different.Mib information includes 4
Kind information, i.e. dl-Bandwidth（Bandwidth）、phich-Config（Physical channel configures）、systemFrameNumber（System
Frame number）And spare（Byte of padding）.Wherein, MIB_FC_NEWAnd MIB_FCDl-Bandwidth, phich-Config and
SystemFrameNumber is identical, and spare is different.Spare totally 10 bit positions, from 0bit positions to 9bit positions.
MIB_FCSpare in, Spare 10 bit positions all 0, in MIB_FC_NEWSpare in, 0bit positions are sign bit,
Positive number can be represented with 0, negative is represented with 1,1bit positions to 7bit positions are data bit, can be used for representing one 8
Integer, represent △ FCScope is（- 128~127）, 8bit positions and 9bit positions are reserved place.
105th, synchronizing information is sent to terminal by broadcast channel.
ENodeB is broadcasted on PBCH channels, broadcasted content FC_NEWAnd utilize FC_NEWThe synchronizing signal and △ of generation
FC, F is utilized for terminalC_NEW, new synchronizing signal and △ FCSynchronize.
Embodiment of the present invention in terms of existing technologies, when arrowband interference effect is into the cell where synchronizing signal
During heart frequency range, one section of new center of housing estate frequency range is searched in cell frequency range, according to the center of the new center of housing estate frequency range
Frequency generates synchronizing information；The synchronizing information is sent to terminal, synchronized for terminal according to the synchronizing information.The party
Method can resist the interference of synchronizing channel and PBCH channels.
Second embodiment of the invention provides another anti-arrowband interference method.Second embodiment is in first embodiment
On the basis of done further improvement, as shown in figure 4, mainly theing improvement is that：After execution of step 105, the anti-arrowband is done
Disturbing method also includes step 106：By FC_NEWIt is added in the Neighboring Cell List of the cell of eNodeB management, allows eNodeB to manage small
Area is added to the frequency as alien frequencies frequency in its Neighboring Cell List, is so ensured that the terminal of other cells and can also be led to
Cross nearby region measurement and measure interfered cell.
Furthermore, it is necessary to explanation, in doing so, eNodeB still need the constantly arrowband around detection
Disturbed condition, corresponding frequency range is selected to be communicated according to the change of arrowband disturbed condition.The change of arrowband disturbed condition can be with
In two kinds of situation：The first situation is to work as FCOn arrowband interference disappear when, eNodeB will be according to FC_NEWCaused synchronizing signal,
PBCH and reference signal are removed, while the cell that also notify the eNodeB to be managed, by FC_NEWManaged from the eNodeB
Removed in the Neighboring Cell List of cell；Second of situation is to work as FCOn arrowband disturbed condition when changing again, prioritizing selection
FC_NEWIf now FC_NEWAlso it is disturbed, then needs anti-arrowband interference method described in the embodiment to re-start and comment
Estimate, search the new available center frequency point of cell frequency range.
Third embodiment of the invention provides a kind of anti-arrowband interference method, as shown in figure 5, it is applied to terminal, including with
Lower step：
501st, the synchronizing information that eNodeB is sent is received.
Synchronizing information includes synchronizing signal and △ FC, synchronizing signal includes FCOr FC_NEW。
502nd, the synchronizing signal in synchronizing information and △ FC, the center frequency point of calculating cell frequency range；Wherein, △ FCFor
Frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of cell frequency range, center of housing estate frequency range are cell
Air-link resources RB where frequency range.
Step 501 and step 502 specifically include：When terminal searches net in start, frequency F is linked into firstC_receive
On, when being disturbed in the absence of arrowband, the FC_receiveCan be FC, when arrowband interference be present, the FC_receiveIt can be to look for
New center of housing estate frequency range center frequency point FC_NEW, then in frequency FC_receiveOn find synchronizing signal, and read PBCH
The mib information of carrying, the mib information include △ FC, with that can be by combining current FC_receiveBe resolved to
Spare calculates the center frequency point F of new cell frequency rangeC_end.Method is：FC_end=FC_receive+ΔFC。
503rd, using the center frequency point processing business of cell frequency range.
Center frequency point F is being determinedC_endAfterwards, terminal then goes to corresponding center frequency point and carries out follow-up SIB (System again
Information block, system information block) receive and follow-up business procedure.
Terminal synchronizes according to the center frequency point of the new synchronizing information disturbed without arrowband and new center of housing estate frequency range,
The interference of synchronizing channel and PBCH channels is resisted.
Four embodiment of the invention provides a kind of eNodeB, including：
Searching unit, when having common factor with center of housing estate frequency range for the interference band where being disturbed when arrowband, in cell frequency
New center of housing estate frequency range is found in section, wherein, the center of housing estate frequency range is the frequency where the air-link resources RB of cell
Section.
Processing unit, for generating synchronizing information according to the center frequency point of the new center of housing estate frequency range.
Transmitting element, for the synchronizing information to be sent into terminal, synchronized for terminal according to the synchronizing information.
Further, the searching unit is specifically used for:A, in the cell band limits, noiseless frequency range collection is searched
Close, the noiseless frequency range set is made up of the multiple noiseless frequency ranges for not having to occur simultaneously with the interference band；B, in the nothing
Searching belt is wider than Radio Link carrying bandwidth BW in interference band set6RBThe first noiseless frequency range；C, described first is found
The center frequency point F of noiseless frequency rangeC_NEW, the FC_NEW=FC+ M*100, the M are satisfaction 75>(M*100)%90>15 integer.
The transmitting element is specifically used for：By the synchronizing signal and the △ FCTerminal is sent to by broadcast channel,
For terminal according to the synchronizing signal and the △ FCThe center frequency point of the new cell frequency range is calculated, and according to described
The center frequency point of new cell frequency range synchronizes.
Embodiment of the present invention in terms of existing technologies, when arrowband interference effect is into the cell where synchronizing signal
During heart frequency range, searching unit searches one section of new center of housing estate frequency range in cell frequency range, and processing unit is according to described new small
The center frequency point generation synchronizing information of district center frequency range；The synchronizing information is sent to terminal by transmitting element, for terminal according to
The synchronizing information synchronizes.The eNodeB can resist the arrowband interference of synchronizing channel and PBCH channels.
Fifth embodiment of the invention provides another eNodeB.5th embodiment is done on the basis of the 4th embodiment
Further improvement, is mainly theed improvement is that：In fifth embodiment of the invention, the eNodeB also includes：Comparing unit,
For before new center of housing estate frequency range is found in cell frequency range in the searching unit, the narrow signal with intermediate-frequeney point to be strong
The size of degree and default interference threshold；Definition unit, for when big in the presence of the signal intensity of continuous N number of frequency in the arrowband
It is described to be more than or equal to 2 for N using the frequency range that N number of frequency is formed as the interference band when default interference threshold
Integer.So, by the narrow signal intensity with intermediate-frequeney point of comparing unit and the size of default interference threshold, make
Obtaining definition unit can define to obtain interference band.
Sixth embodiment of the invention provides another eNodeB.6th embodiment is done on the basis of the 5th embodiment
Further improvement, is mainly theed improvement is that：In sixth embodiment of the invention, the eNodeB also includes：First generation
Unit, for generating synchronizing signal according to the center frequency point of the new center of housing estate frequency range；Second generation unit, for basis
Center frequency point generation the management information block MIB, the byte of padding spare in the MIB of the new center of housing estate frequency range
Calculate △ FC, the △ FCCenter frequency point for the new center of housing estate frequency range and between the center frequency point of new cell frequency range
Frequency offset.In the spare, 0bit positions are sign bit, and 1bit positions to 7bit positions are data bit, 8bit
Position and 9bit positions are reserved place.So, the first generation unit and the second generation unit are respectively by using new cell
The center frequency point F of center binC_NEWGeneration synchronizing signal and MIB, the spare bytes in MIB obtain △ FC。
Seventh embodiment of the invention provides another eNodeB.7th embodiment is done on the basis of the 6th embodiment
Further improvement, is mainly theed improvement is that：In seventh embodiment of the invention, the eNodeB also includes：Adding device,
For by the FC_NEWIt is added in the Neighboring Cell List of the cell of the eNodeB management.So, it can cause that other are small
The terminal in area also can measure interfered cell by nearby region measurement.
Eighth embodiment of the invention provides a kind of terminal, including：
Receiving unit, for receiving the synchronizing information of eNodeB transmissions.
Computing unit, for the synchronizing signal in synchronizing information and △ FC, the center frequency point of calculating cell frequency range；Its
In, △ FCCenter frequency point for center of housing estate frequency range and the frequency offset between the center frequency point of cell frequency range, center of housing estate
Frequency range is the frequency range where the air-link resources RB of cell.
Processing unit, for the center frequency point processing business using cell frequency range.
Terminal synchronizes according to the center frequency point of the new synchronizing information disturbed without arrowband and new center of housing estate frequency range,
The interference of synchronizing channel and PBCH channels is resisted.
Ninth embodiment of the invention provides a kind of communication system, including eNodeB and terminal described in any of the above.Show
Example, the communication system can be LTE communication system.
It is noted that each module involved in present embodiment is logic module, and in actual applications, one
Individual logic unit can be a part for a physical location or a physical location, can also be with multiple physics lists
The combination of member is realized.The operation principle of each physical location may be referred to the narration in embodiment of the method, and the present invention is herein no longer
Repeat.In addition, in order to protrude the innovative part of the present invention, do not have with solving skill proposed by the invention in present embodiment
The less close unit of art issue concerns introduces, but this is not intended that in present embodiment and other units are not present.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (17)
- A kind of 1. anti-arrowband interference method, applied to evolution base station eNodeB, it is characterised in that including：When the interference band where arrowband interference has common factor with center of housing estate frequency range, found in cell frequency range in new cell Heart frequency range, wherein, the center of housing estate frequency range is the frequency range where the air-link resources RB of cell；Synchronizing information is generated according to the center frequency point of the new center of housing estate frequency range；The synchronizing information is sent to terminal, synchronized for terminal according to the synchronizing information；Wherein, the new center of housing estate frequency range is and frequency range of the interference band without common factor.
- 2. anti-arrowband interference method according to claim 1, it is characterised in that it is described found in cell frequency range it is new small Before district center frequency range, methods described also includes：The narrow signal intensity with intermediate-frequeney point and the size of default interference threshold；When the signal intensity that continuous N number of frequency in the arrowband be present is more than default interference threshold, by N number of frequency shape Into frequency range as the interference band, the N is the integer more than or equal to 2, where the interference band is arrowband interference Interference band.
- 3. anti-arrowband interference method according to claim 1, it is characterised in that it is described found in cell frequency range it is new small District center frequency range specifically includes following steps：A, in the cell band limits, search noiseless frequency range set, the noiseless frequency range set by with the interference Frequency range does not have the multiple noiseless frequency range compositions to occur simultaneously；B, band is searched in the noiseless frequency range set and is wider than Radio Link carrying bandwidth BW6RBThe first noiseless frequency range；C, the center frequency point F of the first noiseless frequency range is foundC_NEW, the FC_NEW=(FC+ M*100), the M is satisfaction 75 >(M*100) %90>15 integer；Wherein, FCFor the center frequency point of the cell frequency range.
- 4. anti-arrowband interference method according to claim 1, it is characterised in that described according to the new center of housing estate The center frequency point generation synchronizing information of frequency range includes：Synchronizing signal is generated according to the center frequency point of the new center of housing estate frequency range；Management information block MIB, the filling word in the MIB are generated according to the center frequency point of the new center of housing estate frequency range Save spare and calculate △ FC, the △ FCFor the center frequency of the center frequency point and new cell frequency range of the new center of housing estate frequency range Frequency offset between point.
- 5. anti-arrowband interference method according to claim 4, it is characterised in that described that the synchronizing information is sent to end End, synchronizes according to the synchronizing information for terminal and specifically includes：By the synchronizing signal and the △ FCTerminal is sent to by broadcast channel, for terminal according to the synchronizing signal and institute State △ FCThe center frequency point of the new cell frequency range is calculated, is carried out according to the center frequency point of the new cell frequency range same Step.
- 6. anti-arrowband interference method according to claim 4, it is characterised in thatIn the spare, the 0th bit bit positions are sign bit, and 1bit positions to 7bit positions are data bit, 8bit positions and 9bit positions are reserved place.
- 7. the method for anti-arrowband interference according to claim 3, it is characterised in that methods described also includes：By the FC_NEWIt is added in the Neighboring Cell List of the cell of the eNodeB management.
- A kind of 8. anti-arrowband interference method, applied to terminal, it is characterised in that including：Receive the synchronizing information that evolution base station eNodeB is sent；Synchronizing signal and △ F in the synchronizing informationC, the center frequency point of calculating cell frequency range；Wherein, the △ FCFor Frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of cell frequency range, the center of housing estate frequency range are Frequency range where the air-link resources RB of cell；Use the center frequency point processing business of the cell frequency range.
- A kind of 9. evolution base station eNodeB, it is characterised in that including：Searching unit, when having common factor with center of housing estate frequency range for the interference band where being disturbed when arrowband, in cell frequency range New center of housing estate frequency range is found, wherein, the center of housing estate frequency range is the frequency range where the air-link resources RB of cell；Processing unit, for generating synchronizing information according to the center frequency point of the new center of housing estate frequency range；Transmitting element, for the synchronizing information to be sent into terminal, synchronized for terminal according to the synchronizing information；Wherein, the new center of housing estate frequency range is and frequency range of the interference band without common factor.
- 10. eNodeB according to claim 9, it is characterised in that the eNodeB also includes：Comparing unit, for before finding new center of housing estate frequency range in cell frequency range in the searching unit, narrow band The signal intensity of intermediate-frequeney point and the size of default interference threshold；Definition unit, for when the signal intensity that continuous N number of frequency in the arrowband be present is more than default interference threshold, inciting somebody to action For the frequency range that N number of frequency is formed as the interference band, the N is the integer more than or equal to 2.
- 11. eNodeB according to claim 9, it is characterised in that the searching unit is specifically used for：A, in the cell band limits, search noiseless frequency range set, the noiseless frequency range set by with the interference Frequency range does not have the multiple noiseless frequency range compositions to occur simultaneously；B, searching belt is wider than Radio Link carrying bandwidth BW in the noiseless frequency range set6RBThe first noiseless frequency range；C, the center frequency point F of the first noiseless frequency range is foundC_NEW, the FC_NEW=FC+ M*100, the M are satisfaction 75> (M*100) %90>15 integer；Wherein, FCFor the center frequency point of the cell frequency range.
- 12. eNodeB according to claim 9, it is characterised in that the eNodeB also includes：First generation unit, for generating synchronizing signal according to the center frequency point of the new center of housing estate frequency range；Second generation unit, for generating management information block MIB according to the center frequency point of the new center of housing estate frequency range, according to Byte of padding spare in the MIB calculates △ FC, the △ FCFor the new center of housing estate frequency range center frequency point with it is new Cell frequency range center frequency point between frequency offset.
- 13. eNodeB according to claim 12, it is characterised in that the transmitting element is specifically used for：By the synchronizing signal and the △ FCTerminal is sent to by broadcast channel, for terminal according to the synchronizing signal and institute State △ FCThe center frequency point of the new cell frequency range is calculated, and is carried out according to the center frequency point of the new cell frequency range It is synchronous.
- 14. eNodeB according to claim 12, it is characterised in thatIn the spare, 0bit positions are sign bit, and 1bit positions to 7bit positions are data bit, 8bit positions and 9bit positions are reserved place.
- 15. eNodeB according to claim 11, it is characterised in that the eNodeB also includes：Adding device, for by the FC_NEWIt is added in the Neighboring Cell List of the cell of the eNodeB management.
- A kind of 16. terminal, it is characterised in that including：Receiving unit, for receiving the synchronizing information of evolution base station eNodeB transmissions；Computing unit, for the synchronizing signal in the synchronizing information and △ FC, the center frequency point of calculating cell frequency range；Its In, the △ FCCenter frequency point for center of housing estate frequency range and the frequency offset between the center frequency point of cell frequency range, it is described Center of housing estate frequency range is the frequency range where the air-link resources RB of cell；Processing unit, for the center frequency point processing business using the cell frequency range.
- A kind of 17. communication system, it is characterised in that including：The terminal described in eNodeB and claim 16 described in claim 9 to 15 is any.
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| CN110622584B (en) * | 2017-05-04 | 2021-12-21 | 瑞典爱立信有限公司 | Method and apparatus for signal measurement |
| CN108153321B (en) * | 2017-11-21 | 2020-09-01 | 中国人民解放军陆军工程大学 | Method and device for resisting electromagnetic radiation interference of information link of unmanned aerial vehicle |
| CN114244483B (en) * | 2020-09-09 | 2023-06-06 | 广州海格通信集团股份有限公司 | Synchronous signal block transmission method, system, communication device and storage medium |
| CN112188617B (en) * | 2020-09-15 | 2023-01-24 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Strong interference resisting method and system suitable for 5G system |
| CN113872713B (en) * | 2021-09-30 | 2023-11-14 | 湖南智领通信科技有限公司 | Wireless ad hoc network automatic frequency selection method, device and equipment based on wide and narrow band fusion |
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