CN104753560A - Narrow-band interference resisting method, eNodeB (evolved Node B)and communication system - Google Patents
Narrow-band interference resisting method, eNodeB (evolved Node B)and communication system Download PDFInfo
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- CN104753560A CN104753560A CN201310732438.4A CN201310732438A CN104753560A CN 104753560 A CN104753560 A CN 104753560A CN 201310732438 A CN201310732438 A CN 201310732438A CN 104753560 A CN104753560 A CN 104753560A
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Abstract
The invention relates to the communication field, and discloses a narrow-band interference resisting method, eNodeB (evolved Node B) and communication system. The interference of the narrow-band interference to a synchronization channel and a PBCH (physical broadcast channel) channel can be resisted. The narrow-band interference resisting method comprises the following steps: searching a new cell center frequency band in a cell frequency band when an interference frequency band to which a frequency point in a narrow-band belongs is intersected with the cell center frequency band, wherein the cell center frequency band is the frequency band to which a wireless link resource RB (radio beacon) of the cell belongs; generating synchronization information according to a center frequency point of the new cell center frequency band; sending the synchronization information to a terminal so that the terminal can be used for synchronizing according to the synchronization information. The narrow-band interference resisting method is used for resisting narrow-band interference in the synchronization channel and the PBCH channel.
Description
Technical field
The present invention relates to the communications field, particularly one anti-arrowband interference method, eNodeB(EvolvedNode B, evolution base station) and communication system.
Background technology
LTE (Long Term Evolution, Long Term Evolution) technology utilizes large bandwidth to coordinate the high availability of frequency spectrum simultaneously, makes the advantage of LTE on service rate fairly obvious.LTE technology comprises TDD (Time Division Duplexing, time division duplex) and FDD (Frequency DivisionDuplexing, Frequency Division Duplexing (FDD)) two kinds of dual-modes, is expressed as TDD-LTE and FDD-LTE.
Community in LTE communication system has the bandwidth differed in size from 1.4M ~ 20M, the synchronizing channel of community and PBCH(Physics Broadcast Channel, Physical Broadcast Channel) concentrate 6 RB (the Radio Bear being mapped in bandwidth center shared by community, wireless link carries) in resource, corresponding frequency range position is (F
c-0.54MHz ~ F
c+ 0.54MHz).Usually, for a broadband system, if there is the interference of arrowband around this broadband, part will be made to there is the arrowband of interference cannot normal bearer service, causes the hydraulic performance decline of whole system.LTE technology is by carrying out to the resource of up-downgoing traffic assignments the interference that dynamic conditioning overcomes this arrowband.But when the interference of this arrowband is just in time in the center frequency point place of LTE community, synchronizing channel and PBCH are just likely disturbed.Because synchronizing channel and PBCH can not overcome the interference of this arrowband as Traffic Channel by dynamic conditioning, therefore when synchronizing channel and PBCH disturbed time, terminal can be caused to complete and cannot access on this community all terminals that synchronously and finally makes of this community.When this community A is the adjacent area of certain community B, can because this community A synchronously cannot cause this community of B None-identified, community A, and then the terminal of periphery is in moving process with community B, network cannot allow terminal switch on the A of this community.If network is the TDD-LTE of identical networking, then the arrowband interference of center frequency point will affect whole LTE network.Therefore, anti-Narrow Band Interference of the prior art has circumscribed, cannot resist the interference of this arrowband to the interference of synchronizing channel and PBCH channel.
Summary of the invention
The object of the present invention is to provide a kind of anti-arrowband interference method, eNodeB and communication system, the interference of this arrowband can be resisted to the interference of synchronizing channel and PBCH channel.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of anti-arrowband interference method, are applied to evolution base station eNodeB, comprise:
When the interference band at interference place, arrowband and center of housing estate frequency range have common factor, in the frequency range of community, find new center of housing estate frequency range, wherein, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Center frequency point according to described new center of housing estate frequency range generates synchronizing information;
Described synchronizing information is sent to terminal, carries out synchronously according to described synchronizing information for terminal.
Embodiments of the present invention provide a kind of eNodeB, comprising:
Search unit, for when the interference band at interference place, arrowband and center of housing estate frequency range have common factor, in the frequency range of community, find new center of housing estate frequency range, wherein, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Processing unit, generates synchronizing information for the center frequency point according to described new center of housing estate frequency range;
Transmitting element, for described synchronizing information is sent to terminal, carries out synchronously according to described synchronizing information for terminal.
Embodiments of the present invention additionally provide a kind of anti-arrowband interference method, are applied to terminal, comprise:
Receive the synchronizing information that evolution base station eNodeB sends;
According to the synchronizing signal in described synchronizing information and △ F
c, the center frequency point of calculation plot frequency range; Wherein, described △ F
cfor the frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of community frequency range, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Use the center frequency point process business of described community frequency range.
Embodiments of the present invention additionally provide a kind of terminal, comprising:
Receiving element, for receiving the synchronizing information that evolution base station eNodeB sends;
Computing unit, for according to the synchronizing signal in described synchronizing information and △ F
c, the center frequency point of calculation plot frequency range; Wherein, described △ F
cfor the frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of community frequency range, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Processing unit, for using the center frequency point process business of described community frequency range.
The present invention also provides a kind of communication system, comprising:
Above-described eNodeB and above-described terminal.
Embodiment of the present invention in terms of existing technologies, when arrowband interference effect is to the center of housing estate frequency range at synchronizing signal place, in the frequency range of community, search one section of new center of housing estate frequency range, the center frequency point according to described new center of housing estate frequency range generates synchronizing information; Described synchronizing information is sent to terminal, carries out synchronously for the center frequency point of terminal according to the center of housing estate frequency range without arrowband interference new in synchronizing information.The method can resist the interference of synchronizing channel and PBCH channel.
In addition, described in the frequency range of community, find new center of housing estate frequency range before, described method also comprises:
The relatively signal strength signal intensity of arrowband intermediate-frequeney point and the size of the interference threshold preset;
When the signal strength signal intensity that there is a N continuous frequency in described arrowband is greater than default interference threshold, the frequency range formed by described N number of frequency is as described interference band, described for N be more than or equal to 2 integer, described interference band is the interference band at interference place, arrowband.
By comparing the signal strength signal intensity of arrowband intermediate-frequeney point and the size of the interference threshold preset, interference band can be obtained.
In addition, describedly in the frequency range of community, find new center of housing estate frequency range specifically comprise the following steps: a, in the band limits of described community, search noiseless frequency range set, described noiseless frequency range set is made up of the multiple noiseless frequency range of not occuring simultaneously with described interference band; B, in described noiseless frequency range set searching belt be wider than wireless link carrying bandwidth BW
6RBthe first noiseless frequency range; C, find the center frequency point F of described first noiseless frequency range
c_NEW, described F
c_NEW=F
c+ M*100, described M are for meeting the integer of 75> (M*100) %90>15.
By searching, satisfied band is wider than BW
6RB, and center frequency point F
c_NEWmeet F
c_NEW=F
cthe first noiseless frequency range of+M*100, as new center of housing estate frequency range, uses new center of housing estate frequency range to carry out the propagation of signal on synchronizing signal and PBCH.
In addition, the described generation of the center frequency point according to described new center of housing estate frequency range synchronizing information comprises: the center frequency point according to described new center of housing estate frequency range generates synchronizing signal; Generate management block of information MIB according to the center frequency point of described new center of housing estate frequency range, calculate △ F according to the byte of padding spare in described MIB
c, described △ F
cfor the frequency offset between the center frequency point of described new center of housing estate frequency range and the center frequency point of new community frequency range.
By using the center frequency point F of new center of housing estate frequency range
c_NEWgenerate synchronizing signal and MIB, obtain △ F according to the spare in MIB
c.
In addition, in described spare, the 0th bit bit position is sign bit, and 1bit position to 7bit position is data bit, and 8bit position and 9bit position are reserved place.
By defining 10 bit positions of spare, using the 1bit position of spare to 7bit position as data bit, thus obtain △ F
c.
In addition, described method also comprises: by described F
c_NEWjoin in the Neighboring Cell List of the community that described eNodeB manages.Make the terminal of other communities also can measure interfered cell by nearby region measurement.
Accompanying drawing explanation
Fig. 1 is the anti-arrowband interference method schematic flow sheet of first embodiment of the invention;
Fig. 2 is frequency spectrum and the arrowband interference schematic diagram of the LTE community of first embodiment of the invention;
Fig. 3 is the method flow schematic diagram searching new center of housing estate frequency range 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
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.But, persons of ordinary skill in the art may appreciate that in each execution mode of the present invention, proposing many ins and outs to make reader understand the application better.But, even without these ins and outs with based on the many variations of following execution mode and amendment, each claim of the application technical scheme required for protection also can be realized.
First embodiment of the invention provides a kind of anti-arrowband interference method, is applied to eNodeB, and this anti-arrowband interference method can solve when LTE cell synchronous signal and PBCH are flooded by arrowband interference, the problem that this LTE community cannot use.As shown in Figure 1, this anti-arrowband interference method comprises the following steps:
101, the interference band in the frequency range of community is obtained.
As shown in Figure 2, the schematic diagram of the frequency spectrum of Tu2Wei community and arrowband interference, transverse axis represents the frequency f that community uses, and the longitudinal axis represents the signal strength signal intensity of each frequency.The frequency range supposing LTE cell operation is community frequency range, is denoted as (F
1~ F
2), this community frequency range is with F
ccentered by frequency, take BW as bandwidth, in the lte networks, eNodeB can the moment network quality is measured.In figure, thresholding R is default interference threshold.When there is arrowband interference in systematic survey to this community frequency range, the relatively signal strength signal intensity of arrowband intermediate-frequeney point and the size of the interference threshold preset, the signal strength signal intensity of arrowband interference m1, m2 and m3 intermediate-frequeney point is S1, S3 and S2, all be greater than thresholding R, then community frequency range can be divided into multiple interference band and multiple noiseless frequency range by thresholding R.When the signal strength signal intensity that there is a N continuous frequency in arrowband is greater than default interference threshold, the frequency range formed by N number of frequency is as described interference band, and this interference band is the interference band at interference place, arrowband, described N be more than or equal to 2 integer.The plurality of interference band is that the signal strength signal intensity of arrowband frequency is greater than frequency range corresponding to the frequency of default interference threshold, and the plurality of noiseless frequency range is the frequency range that the signal strength signal intensity of arrowband frequency is less than or equal to without arrowband interference in frequency range corresponding to the frequency of default interference threshold or community frequency range.In Fig. 2, the interference band of the frequency range Wei Gai LTE community at m1, m2 and m3 place, n1, n2, n3 and n4 are noiseless frequency range.
When the signal strength signal intensity of narrowband intermediate frequency point is less than or equal to default interference threshold, thinks that the impact of interference of this frequency is very little, the impact of this interference on cell communication can be considered.
102, judge whether interference band and the center of housing estate frequency range at interference place, arrowband have common factor.
Center of housing estate frequency range can be the frequency range at 6 air-link resources RB places of community, and usually, this center of housing estate frequency range is (F
c-0.54MHz ~ F
c+ 0.54MHz).Disturbed arrowband the interference band at place and center of housing estate frequency range to compare, judge interference band m1, m2 and m3 and the center of housing estate frequency range (F at interference place, arrowband
c-0.54MHz ~ F
c+ 0.54MHz) whether there is common factor.When the interference band at narrowband intermediate frequency point place and center of housing estate frequency range have common factor, perform step 103.Suppose that m2 and m3 and center of housing estate frequency range have common factor, then this LTE cell synchronous signal and PBCH has been flooded in the interference of task arrowband.
103, when the interference band at narrowband intermediate frequency point place and center of housing estate frequency range have common factor, in the frequency range of community, new center of housing estate frequency range is found.
New center of housing estate frequency range is without the frequency range of occuring simultaneously with interference band.
As shown in Figure 3, described step 103 specifically comprises following sub-step:
1031, in the band limits of community, the noiseless frequency range set of not occuring simultaneously with interference band is searched.
Namely the multiple noiseless frequency range n1 obtained in finding step 101, n2, n3 and n4, the plurality of noiseless frequency range forms noiseless frequency range set (F
aVAILABLE_LOW_N~ F
aVAILABLE_HIGH_N).Multiple noiseless frequency range in frequency range set that this is noiseless can be expressed as { (F
available_low_1~ F
available_high_1), (F
available_low_2~ F
available_high_2) ..., (F
available_low_n~ F
available_high_n).
1032, in noiseless frequency range set, search band be wider than wireless link carrying bandwidth BW
6RBthe first noiseless frequency range.
First the bandwidth of each interference band in multiple noiseless frequency range set is obtained, the method obtaining the bandwidth of each interference band in multiple noiseless frequency range set is ask the difference of highest frequency in each noiseless frequency range and low-limit frequency, example, the bandwidth BW of noiseless frequency range
aVAILABLE_N=(F
aVAILABLE_HIGH_N-F
aVAILABLE_LOW_N).
Then wireless link carrying bandwidth BW is compared
6RBwith the size of the bandwidth of multiple noiseless frequency range, find out band and be wider than BW
6RBnoiseless frequency range.Band is wider than BW
6RBnoiseless frequency range be called the first noiseless frequency range.This first noiseless frequency range can be multiple.
1033, in the first noiseless frequency range, search the center frequency point F of new center of housing estate frequency range
c_NEW.
At the { (F of the first noiseless frequency range
aVAILABLE_LOW_N+ BW
6RB/ 2) ~ (F
aVAILABLE_HIGH_N-BW
6RB/ 2) the center frequency point F of new center of housing estate frequency range } is searched in scope
c_NEW, i.e. F
c_NEWfor the new center frequency point of 6 the RB place frequency ranges in community.Described F simultaneously
c_NEWalso meet F
c_NEW=(F
c+ M*100), wherein, F
cfor the center frequency point of described community frequency range, M is for meeting the integer of 75> (M*100) %90>15.F
c_NEWcan be multiple, in practical application, select a F as required
c_NEWuse.
104, synchronizing information is generated according to the center frequency point of new center of housing estate frequency range.
Step 104 comprises: according to described F
c_NEWgenerate synchronizing signal.
Find this F
c_NEWafter, based on this F
c_NEWcarry out PSS(Primary synchronizationsequence, main synchronizing sequence simultaneously) and SSS(Auxiliary synchronization sequence, secondary synchronization sequences) propagation of signal, based on F
c_NEWgenerate synchronizing signal and at F
cthe synchronizing signal of upper propagation is completely the same.
Step 104 also comprises: according to F
c_NEWgenerate management block of information MIB, calculate △ F according to the byte of padding spare in MIB
c, △ F
cfor F
c_NEWand the frequency offset between center frequency point new in the frequency range of community.
When generating synchronizing signal, simultaneously also can based on F
c_NEWregenerate MIB (MasterInformation Block, management information block), at this F
c_NEWon corresponding PBCH channel, propagate MIB, the mib information regenerated is denoted as MIB_F
c_NEWinformation, at F
cthe mib information of upper propagation is denoted as MIB_F
c, MIB_F
c_NEWand MIB_F
cdifferent.Mib information comprises 4 kinds of information, i.e. dl-Bandwidth(bandwidth), phich-Config(physical channel configuration), systemFrameNumber(System Frame Number) and spare(byte of padding).Wherein, MIB_F
c_NEWand MIB_F
cdl-Bandwidth, phich-Config and systemFrameNumber be identical, spare is different.Spare is totally 10 bit positions, from 0bit position to 9bit position.At MIB_F
cspare in, 10 bit positions of Spare are all 0, at MIB_F
c_NEWspare in, 0bit position is sign bit, and can represent positive number with 0, represent negative with 1,1bit position to 7bit position is data bit, can be used for the integer of expression one 8, represents △ F
cscope is (-128 ~ 127), and 8bit position and 9bit position are reserved place.
105, synchronizing information is sent to terminal by broadcast channel.
ENodeB broadcasts on PBCH channel, and broadcasted content is F
c_NEWand utilize F
c_NEWthe synchronizing signal generated and △ F
c, utilize F for terminal
c_NEW, new synchronizing signal and △ F
ccarry out synchronous.
Embodiment of the present invention in terms of existing technologies, when arrowband interference effect is to the center of housing estate frequency range at synchronizing signal place, in the frequency range of community, search one section of new center of housing estate frequency range, the center frequency point according to described new center of housing estate frequency range generates synchronizing information; Described synchronizing information is sent to terminal, carries out synchronously according to described synchronizing information for terminal.The method can resist the interference of synchronizing channel and PBCH channel.
Second embodiment of the invention provides another kind of anti-arrowband interference method.Second execution mode has done further improvement on the first execution mode basis, and as shown in Figure 4, main improvements are: after execution of step 105, and this anti-arrowband interference method also comprises step 106: by F
c_NEWjoin in the Neighboring Cell List of the community of eNodeB management, this frequency joins in its Neighboring Cell List as alien frequencies frequency by the community allowing eNodeB manage, and so just can ensure that the terminal of other communities also can measure interfered cell by nearby region measurement.
In addition, it should be noted that, in doing so, eNodeB still needs constantly to detect arrowband disturbed condition around, selects corresponding frequency range to communicate according to the change of arrowband disturbed condition.The change of arrowband disturbed condition can in two kinds of situation: the first situation works as F
con arrowband interference disappear time, eNodeB will according to F
c_NEWthe synchronizing signal produced, PBCH and reference signal are removed, and also will notify the community that this eNodeB manages, by F simultaneously
c_NEWremove from the Neighboring Cell List of the community that this eNodeB manages; The second situation works as F
con arrowband disturbed condition when again changing, prioritizing selection F
c_NEWif, now F
c_NEWalso disturbed, then need to re-start assessment according to the anti-arrowband interference method described in present embodiment, search the new available center frequency point of community frequency range.
Third embodiment of the invention provides a kind of anti-arrowband interference method, as shown in Figure 5, is applied to terminal, comprises the following steps:
501, the synchronizing information that eNodeB sends is received.
Synchronizing information comprises synchronizing signal and △ F
c, synchronizing signal comprises F
cor F
c_NEW.
502, according to the synchronizing signal in synchronizing information and △ F
c, the center frequency point of calculation plot frequency range; Wherein, △ F
cfor the frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of community frequency range, center of housing estate frequency range is the frequency range at the air-link resources RB place of community.
Step 501 and step 502 specifically comprise: when terminal searches net in start time, be first linked into frequency F
c_receiveon, when there is not arrowband interference, this F
c_receivecan be F
c, when there is arrowband interference, this F
c_receivecan be the center frequency point F of the new center of housing estate frequency range of searching
c_NEW, then at this frequency F
c_receiveon find synchronizing signal, and read PBCH carrying mib information, this mib information comprises △ F
c, with that can by conjunction with current F
c_receivewith the spare be resolved to calculate the center frequency point F of new community frequency range
c_end.Method is: F
c_end=F
c_receive+ Δ F
c.
503, the center frequency point process business of community frequency range is used.
Determining center frequency point F
c_endafter, terminal then forwards corresponding center frequency point to and carries out follow-up SIB (System information block, system information block) reception and follow-up business procedure again.
Terminal carries out synchronously, having resisted the interference of synchronizing channel and PBCH channel without the synchronizing information of arrowband interference and the center frequency point of new center of housing estate frequency range according to new.
Four embodiment of the invention provides a kind of eNodeB, comprising:
Search unit, for when the interference band at interference place, arrowband and center of housing estate frequency range have common factor, in the frequency range of community, find new center of housing estate frequency range, wherein, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community.
Processing unit, generates synchronizing information for the center frequency point according to described new center of housing estate frequency range.
Transmitting element, for described synchronizing information is sent to terminal, carries out synchronously according to described synchronizing information for terminal.
Further, described in search unit specifically for: a, in the band limits of described community, search noiseless frequency range set, described noiseless frequency range set is made up of the multiple noiseless frequency range of not occuring simultaneously with described interference band; B, in described noiseless frequency range set searching belt be wider than wireless link carrying bandwidth BW
6RBthe first noiseless frequency range; C, find the center frequency point F of described first noiseless frequency range
c_NEW, described F
c_NEW=F
c+ M*100, described M are for meeting the integer of 75> (M*100) %90>15.
Described transmitting element specifically for: by described synchronizing signal and described △ F
cterminal is sent to, for terminal according to described synchronizing signal and described △ F by broadcast channel
ccalculate the center frequency point of described new community frequency range, and carry out synchronously according to the center frequency point of described new community frequency range.
Embodiment of the present invention in terms of existing technologies, when arrowband interference effect is to the center of housing estate frequency range at synchronizing signal place, search unit in the frequency range of community, search one section of new center of housing estate frequency range, processing unit generates synchronizing information according to the center frequency point of described new center of housing estate frequency range; Described synchronizing information is sent to terminal by transmitting element, carries out synchronously according to described synchronizing information for terminal.This eNodeB can resist the arrowband interference of synchronizing channel and PBCH channel.
Fifth embodiment of the invention provides another kind of eNodeB.5th execution mode has done further improvement on the 4th execution mode basis, main improvements are: in fifth embodiment of the invention, described eNodeB also comprises: comparing unit, for searching before unit finds new center of housing estate frequency range in the frequency range of community described, compare the signal strength signal intensity of arrowband intermediate-frequeney point and the size of the interference threshold preset; Definition unit, during for being greater than default interference threshold when the signal strength signal intensity that there is a N continuous frequency in described arrowband, the frequency range that described N number of frequency is formed as described interference band, described for N be more than or equal to 2 integer.So, compared the signal strength signal intensity of arrowband intermediate-frequeney point and the size of the interference threshold preset by comparing unit, definition unit can be defined and obtain interference band.
Sixth embodiment of the invention provides another kind of eNodeB.6th execution mode has done further improvement on the 5th execution mode basis, main improvements are: in sixth embodiment of the invention, described eNodeB also comprises: the first generation unit, generates synchronizing signal for the center frequency point according to described new center of housing estate frequency range; Second generation unit, for generating management block of information MIB according to the center frequency point of described new center of housing estate frequency range, calculates △ F according to the byte of padding spare in described MIB
c, described △ F
cfor the frequency offset between the center frequency point of described new center of housing estate frequency range and the center frequency point of new community frequency range.In described spare, 0bit position is sign bit, and 1bit position to 7bit position is data bit, and 8bit position and 9bit position are reserved place.So, the first generation unit and the second generation unit are respectively by the center frequency point F using new center of housing estate frequency range
c_NEWgenerate synchronizing signal and MIB, obtain △ F according to the spare byte in MIB
c.
Seventh embodiment of the invention provides another kind of eNodeB.7th execution mode has done further improvement on the 6th execution mode basis, and main improvements are: in seventh embodiment of the invention, and described eNodeB also comprises: adding device, for by described F
c_NEWjoin in the Neighboring Cell List of the community that described eNodeB manages.So, the terminal of other communities can be made also can to measure interfered cell by nearby region measurement.
Eighth embodiment of the invention provides a kind of terminal, comprising:
Receiving element, for receiving the synchronizing information that eNodeB sends.
Computing unit, for according to the synchronizing signal in synchronizing information and △ F
c, the center frequency point of calculation plot frequency range; Wherein, △ F
cfor the frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of community frequency range, center of housing estate frequency range is the frequency range at the air-link resources RB place of community.
Processing unit, for using the center frequency point process business of community frequency range.
Terminal carries out synchronously, having resisted the interference of synchronizing channel and PBCH channel without the synchronizing information of arrowband interference and the center frequency point of new center of housing estate frequency range according to new.
Ninth embodiment of the invention provides a kind of communication system, comprises above eNodeB described arbitrarily and terminal.Example, this communication system can be LTE communication system.
It is worth mentioning that, each module involved in present embodiment is logic module, and in actual applications, a logical block can be a physical location, also can be a part for a physical location, can also realize with the combination of multiple physical location.The operation principle of each physical location can describing in reference method embodiment, and the present invention does not repeat them here.In addition, in order to outstanding innovative part of the present invention, the unit not too close with solving technical problem relation proposed by the invention is not introduced in present embodiment, but this does not show the unit that there is not other in present embodiment.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above realize specific embodiments of the invention, and in actual applications, various change can be done to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (17)
1. an anti-arrowband interference method, is applied to evolution base station eNodeB, it is characterized in that, comprising:
When the interference band at interference place, arrowband and center of housing estate frequency range have common factor, in the frequency range of community, find new center of housing estate frequency range, wherein, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Center frequency point according to described new center of housing estate frequency range generates synchronizing information;
Described synchronizing information is sent to terminal, carries out synchronously according to described synchronizing information for terminal.
2. anti-arrowband according to claim 1 interference method, is characterized in that, described in the frequency range of community, find new center of housing estate frequency range before, described method also comprises:
The relatively signal strength signal intensity of arrowband intermediate-frequeney point and the size of the interference threshold preset;
When the signal strength signal intensity that there is a N continuous frequency in described arrowband is greater than default interference threshold, the frequency range formed by described N number of frequency is as described interference band, described for N be more than or equal to 2 integer, described interference band is the interference band at interference place, arrowband.
3. anti-arrowband according to claim 1 interference method, is characterized in that, describedly in the frequency range of community, finds new center of housing estate frequency range specifically comprise the following steps:
A, in the band limits of described community, search noiseless frequency range set, described noiseless frequency range set is made up of the multiple noiseless frequency range of not occuring simultaneously with described interference band;
B, search in described noiseless frequency range set band be wider than wireless link carrying bandwidth BW
6RBthe first noiseless frequency range;
C, find the center frequency point F of described first noiseless frequency range
c_NEW, described F
c_NEW=(F
c+ M*100), described M is for meeting the integer of 75> (M*100) %90>15.
4. anti-arrowband according to claim 1 interference method, is characterized in that, the described center frequency point according to described new center of housing estate frequency range generates synchronizing information and comprises:
Center frequency point according to described new center of housing estate frequency range generates synchronizing signal;
Generate management block of information MIB according to the center frequency point of described new center of housing estate frequency range, calculate △ F according to the byte of padding spare in described MIB
c, described △ F
cfor the frequency offset between the center frequency point of described new center of housing estate frequency range and the center frequency point of new community frequency range.
5. anti-arrowband according to claim 4 interference method, is characterized in that, described described synchronizing information is sent to terminal, carries out synchronously specifically comprising according to described synchronizing information for terminal:
By described synchronizing signal and described △ F
cterminal is sent to, for terminal according to described synchronizing signal and described △ F by broadcast channel
ccalculate the center frequency point of described new community frequency range, the center frequency point according to described new community frequency range is carried out synchronously.
6. anti-arrowband according to claim 4 interference method, is characterized in that,
In described spare, the 0th bit bit position is sign bit, and 1bit position to 7bit position is data bit, and 8bit position and 9bit position are reserved place.
7. the method for anti-arrowband interference according to claim 4, it is characterized in that, described method also comprises:
By described F
c_NEWjoin in the Neighboring Cell List of the community that described eNodeB manages.
8. an anti-arrowband interference method, is applied to terminal, it is characterized in that, comprising:
Receive the synchronizing information that evolution base station eNodeB sends;
According to the synchronizing signal in described synchronizing information and △ F
c, the center frequency point of calculation plot frequency range; Wherein, described △ F
cfor the frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of community frequency range, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Use the center frequency point process business of described community frequency range.
9. an evolution base station eNodeB, is characterized in that, comprising:
Search unit, for when the interference band at interference place, arrowband and center of housing estate frequency range have common factor, in the frequency range of community, find new center of housing estate frequency range, wherein, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Processing unit, generates synchronizing information for the center frequency point according to described new center of housing estate frequency range;
Transmitting element, for described synchronizing information is sent to terminal, carries out synchronously according to described synchronizing information for terminal.
10. eNodeB according to claim 9, is characterized in that, described eNodeB also comprises:
Comparing unit, for searching before unit finds new center of housing estate frequency range in the frequency range of community described, compares the signal strength signal intensity of arrowband intermediate-frequeney point and the size of the interference threshold preset;
Definition unit, during for being greater than default interference threshold when the signal strength signal intensity that there is a N continuous frequency in described arrowband, the frequency range that described N number of frequency is formed as described interference band, described for N be more than or equal to 2 integer.
11. eNodeB according to claim 9, is characterized in that, described in search unit specifically for:
A, in the band limits of described community, search noiseless frequency range set, described noiseless frequency range set is made up of the multiple noiseless frequency range of not occuring simultaneously with described interference band;
B, in described noiseless frequency range set searching belt be wider than wireless link carrying bandwidth BW
6RBthe first noiseless frequency range;
C, find the center frequency point F of described first noiseless frequency range
c_NEW, described F
c_NEW=F
c+ M*100, described M are for meeting the integer of 75> (M*100) %90>15.
12. eNodeB according to claim 9, is characterized in that, described eNodeB also comprises:
First generation unit, generates synchronizing signal for the center frequency point according to described new center of housing estate frequency range;
Second generation unit, for generating management block of information MIB according to the center frequency point of described new center of housing estate frequency range, calculates △ F according to the byte of padding spare in described MIB
c, described △ F
cfor the frequency offset between the center frequency point of described new center of housing estate frequency range and the center frequency point of new community frequency range.
13. eNodeB according to claim 12, is characterized in that, described transmitting element specifically for:
By described synchronizing signal and described △ F
cterminal is sent to, for terminal according to described synchronizing signal and described △ F by broadcast channel
ccalculate the center frequency point of described new community frequency range, and carry out synchronously according to the center frequency point of described new community frequency range.
14. eNodeB according to claim 12, is characterized in that,
In described spare, 0bit position is sign bit, and 1bit position to 7bit position is data bit, and 8bit position and 9bit position are reserved place.
15. eNodeB according to claim 12, is characterized in that, described eNodeB also comprises:
Adding device, for by described F
c_NEWjoin in the Neighboring Cell List of the community that described eNodeB manages.
16. 1 kinds of terminals, is characterized in that, comprising:
Receiving element, for receiving the synchronizing information that evolution base station eNodeB sends;
Computing unit, for according to the synchronizing signal in described synchronizing information and △ F
c, the center frequency point of calculation plot frequency range; Wherein, described △ F
cfor the frequency offset between the center frequency point of center of housing estate frequency range and the center frequency point of community frequency range, described center of housing estate frequency range is the frequency range at the air-link resources RB place of community;
Processing unit, for using the center frequency point process business of described community frequency range.
17. 1 kinds of communication systems, is characterized in that, comprising:
The arbitrary described eNodeB of claim 9 to 15 and terminal according to claim 16.
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