CN102315866A - Method and system for calibrating antennae based on time division duplexing (TDD) coordinated multi-point transmission - Google Patents
Method and system for calibrating antennae based on time division duplexing (TDD) coordinated multi-point transmission Download PDFInfo
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- CN102315866A CN102315866A CN2010102199670A CN201010219967A CN102315866A CN 102315866 A CN102315866 A CN 102315866A CN 2010102199670 A CN2010102199670 A CN 2010102199670A CN 201010219967 A CN201010219967 A CN 201010219967A CN 102315866 A CN102315866 A CN 102315866A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H04B17/10—Monitoring; Testing of transmitters
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Abstract
The invention discloses a method for calibrating antennae based on time division duplexing (TDD) coordinated multi-point transmission. The method comprises the following steps that: if determining that the antennae of a cell are required to be calibrated, a base station calibrates a plurality of antennae in the cell; if determining that calibration parameters of the cell are required to be acquired, a neighbor cell returns a judgment result to the cell; and after calibration is finished, the cell sends the calibration parameters to the neighbor cell, and the neighbor cell calibrates the antennae in the cell according to the calibration parameters of the cell. Correspondingly, the invention also discloses a system for calibrating the antennae based on the TDD coordinated multi-point transmission. By the invention, if the situation of the cell which is required to be subjected to antenna calibration is similar to that of the neighbor cell, the neighbor cell can calibrate the antennae in the cell according to the calibration parameters of the cell after the antenna calibration of the cell is finished, so more auxiliary resources can be saved during the guaranteeing of the effectiveness of sounding reference signal (SRS) feedback and the improvement of feedback accuracy.
Description
Technical field
(Coordinated Multi-Point, CoMP) transmission technology relate in particular to a kind of based on time division duplex (Time Division Duplexing, TDD) antenna correcting method and the system of multipoint cooperative transmission to the present invention relates to multipoint cooperative.
Background technology
LTE-A is by International Standards Organization's third generation gpp (3rd Generation PartnershipProject; 3GPP) exploitation, the latest generation wireless communication standard of working out are further developing and evolution of LTE (Long TermEvolution) serial communication standard.CoMP is an important technology that intend to adopt among the LTE-A, and this technology can realize the improvement of multiple different technologies index through adopting the emission/reception of cooperating of a plurality of nodes; As improve the covering at hardware circuit solution, reinforced cell edge etc.; The most frequently used mode of operation of CoMP is following: (User Equipment UE) is in center of housing estate when zone, and neighbor cell interference is very little when subscriber equipment; Channel condition is better; In this case, CoMP can be operated in the cooperation transmission pattern, so that make UE obtain the highest message transmission rate.Under this kind pattern, therefore a plurality of transmitting nodes that cooperation is concentrated are a kind of space division multiplexing patterns of multinode simultaneously to the terminal transmission independent data stream.Compare with the space division multiplexing of single node, therefore the space division multiplexing of multi-node collaboration transmission can obtain better multiplexing effect because the independence of channel is better.
In traditional non-cooperation transmission scene; When UE was positioned at cell edge, the reception of UE was very poor, and this is caused by following two reasons: first; Transmitting after the decline of having experienced long distance of this sub-district; Under the situation of not carrying out the control of special power, its intensity a little less than, suitable with the signal strength signal intensity of neighbor cell; The second, under traditional non-collaboration mode, UE receives that the signal of adjacent cells disturbs (frequency duplex factor as one in the minizone among the LTE-A is 1).Under above-mentioned situation, (Beam forming, BF) pattern not only can be avoided the interference of neighbor cell, but also can turn waste into wealth, and the signal at reinforced cell edge covers if the network wave beam that adopts CoMP to transmit forms.
In this process; UE needs in time to carry out feedback information to E-NodeB, this be because, only fully, timely under the feedback information prerequisite; Optimal working method just can be adjusted, selected to each node that cooperation is concentrated under the situation of mutual exchange of information; For this reason, the feedback information pattern to UE among the 3GPP has been carried out sufficient research, mainly contains following three kinds of modes:
1) explicit feedback
What this moment, UE fed back is the channel that observes, and does not advance any conversion and processing.
2) implicit feedback
This moment UE feedback be CQI (Channel Quality Indicator, CQI) or precoding matrix indicators (Precoding Matrix Indicator, PMI) or the channel sequence designator (RankIndicator, RI).
3) detection reference signal (Sounding Reference Signal, SRS) feedback of utilizing UE to launch
This feedback is the SRS signal through up-downgoing, and (E-NodeB) estimates down channel by the base station.The system under the tdd mode of being operated in can adopt the feedback of this form.
Compare with second kind of feedback system with first kind of feedback system, the third feedback system has made full use of the electromagnetism reciprocity of TDD system physical channel, and feedback accuracy is high, and required additional resource is few, is optimal a kind of feedback system in the TDD system therefore.
But; Because the TDD system only is that physical channel has reciprocity; Receive the influence of numerous factors such as temperature, path loss, dislocation can appear in the amplitude/phase of the radio frequency link gain that each antenna is corresponding, causes the gain of up-downgoing radio frequency link and antenna different; In this case, the passage of whole signal flow warp does not have reciprocity on the whole.Therefore, if radio frequency link and antenna gain are not proofreaied and correct and compensated, the TDD system also can't directly use the feedback of SRS mode.
And existing bearing calibration is primarily aimed at gain calibration problem or the gain calibration problem between each independent array element of same array antenna between the corresponding radio frequency link up-downgoing of antenna, and Shang Weiyou is applied to the antenna alignment technique in the transmission of TDD multipoint cooperative.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of antenna correcting method and system based on the transmission of TDD multipoint cooperative; Correction be can realize, thereby validity, raising feedback accuracy, the saving additional resource of SRS feedback guaranteed a plurality of antennas in the transmission of TDD multipoint cooperative.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of antenna correcting method based on the transmission of TDD multipoint cooperative comprises:
Under TDD multipoint cooperative transmitting scene, the base station judgement under the sub-district need be proofreaied and correct the antenna of said sub-district, then the antenna in the said sub-district is proofreaied and correct;
Said neighbor cell judgement need be obtained the correction parameter of said sub-district, then judged result is returned to said sub-district;
Said sub-district sends to said neighbor cell with correction parameter after proofreading and correct end, said neighbor cell is according to from the correction parameter of said sub-district antenna wherein being proofreaied and correct.
Base station judgement under the said sub-district need be carried out timing to the antenna of said sub-district, and this method also comprises: the neighbor cell of said sub-district is notified in said base station, and said sub-district will be carried out antenna and proofreaied and correct.
This method also comprises: the neighbor cell of said sub-district is inquired about the antenna correction situation of said sub-district;
The antenna correction is being carried out in said sub-district, then notifies said neighbor cell, and said sub-district is being carried out antenna and proofreaied and correct.
Said sub-district has under the situation more than an antenna; Base station judgement under the said sub-district need be proofreaied and correct the antenna of said sub-district and is: the base station under the said sub-district obtains the gain and/or the phase place of the corresponding radio frequency link of each antenna according to the situation of each antenna reception detection reference signal of sub-district; Afterwards; Gain and/or phase place to the corresponding radio frequency link of each antenna of sub-district compare in twos; The difference of maximum comparison value and minimum comparison value is greater than preset thresholding in the comparison value that obtains, and then judgement need be carried out the antenna correction.
This method also comprises: the neighbor cell of said sub-district is notified in said base station, and said sub-district will be carried out the antenna correction or carried out the antenna timing, and said maximum comparison value and minimum comparison value are sent to said neighbor cell.
Said neighbor cell judges whether that the correction parameter that need obtain said sub-district is:
The situation that said neighbor cell receives detection reference signal according to each antenna is wherein obtained the gain and/or the phase place of the corresponding radio frequency link of said each antenna;
Said neighbor cell compares the gain and/or the phase place of the radio frequency link that wherein each antenna is corresponding in twos, obtains maximum comparison value and minimum comparison value in the comparison value;
Said neighbor cell judges that the difference of the maximum comparison value that send said maximum comparison value that obtains and said sub-district is in the preset scope; And the difference of the minimum comparison value that send said minimum comparison value that obtains and said sub-district is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the maximum comparison value that send said maximum comparison value that obtains and said sub-district is in outside the preset scope; Perhaps; The difference of the minimum comparison value that send said minimum comparison value that obtains and said sub-district is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Said sub-district has under the situation of an antenna; Base station judgement under the said sub-district need be proofreaied and correct the antenna of said sub-district and is: antenna in cell receives the intensity/signalling channel overall gain of detection reference signal less than preset thresholding, and then judgement need be proofreaied and correct the antenna of said sub-district.
This method also comprises: the neighbor cell of said sub-district is notified in said base station, and said sub-district will be carried out antenna and proofreaied and correct or carrying out the antenna timing, and the intensity/signalling channel overall gain of said reception detection reference signal is sent to said neighbor cell.
Said neighbor cell judges whether that the correction parameter that need obtain said sub-district is:
Said neighbor cell obtains the wherein intensity/signalling channel overall gain of antenna reception detection reference signal;
Said neighbor cell judges that the difference of the intensity/signalling channel overall gain of the intensity/signalling channel overall gain of the said reception detection reference signal that obtains and the reception detection reference signal that send said sub-district is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the intensity/signalling channel overall gain of the reception detection reference signal that send the intensity of the said reception detection reference signal that obtains/signalling channel overall gain and said sub-district is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Said sub-district has under the situation more than an antenna, and said base station is proofreaied and correct the antenna in the said sub-district and is:
A reference antenna is selected in said base station from a plurality of antennas of said sub-district;
Gain and/or phase place that the corresponding radio frequency link of adjustment antenna is treated according to the gain and/or the phase place of the corresponding radio frequency link of said reference antenna in said base station are adjusted, and notifying user equipment gets into the antenna correction mode;
Said subscriber equipment gets into the antenna correction mode, measures gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna, and said gain and/or phase place are reported said base station;
Said base station is according to the gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna of user equipment to report, and judgement need be proceeded antenna and proofread and correct, and then proceeds antenna and proofreaies and correct.
A kind of antenna corrective system based on the transmission of TDD multipoint cooperative comprises: first base station, second base station; Wherein,
Said first base station is used for need carrying out timing to the antenna of the sub-district under said first base station in judgement under the TDD multipoint cooperative transmitting scene, and the antenna in the said sub-district is proofreaied and correct; And need obtain the correction parameter of said sub-district in second base station time, said sub-district proofread and correct finish after, correction parameter is sent to said second base station;
Said second base station is the base station under the neighbor cell of said sub-district, is used to judge whether to obtain the correction parameter of said sub-district, and when judgement need be obtained the correction parameter of said sub-district, judged result is returned to said first base station; And the antenna of the said neighbor cell under it is proofreaied and correct according to correction parameter from said first base station.
Said first base station also is used for need carrying out timing to the antenna of the sub-district under said first base station in judgement, notifies said second base station, and said sub-district will be carried out antenna and proofreaied and correct.
Said second base station also is used for the antenna correction situation of said sub-district is inquired about;
Said first base station also is used in the inquiry of receiving said second base station, and said sub-district carrying out the antenna timing, notifies said neighbor cell, and said sub-district is being carried out antenna and proofreaied and correct.
Said sub-district has under the situation more than an antenna; The said first base station judgement need be proofreaied and correct the antenna of the sub-district under said first base station: gain and/or the phase place of obtaining the corresponding radio frequency link of each antenna according to the situation of each antenna reception detection reference signal of sub-district; Afterwards; Gain and/or phase place to the corresponding radio frequency link of each antenna of sub-district compare in twos; The difference of maximum comparison value and minimum comparison value is greater than preset thresholding in the comparison value that obtains, and then judgement need be carried out the antenna correction.
Said first base station also is used for notifying second base station, when said sub-district will be carried out the antenna correction or carried out the antenna correction, sends said maximum comparison value and minimum comparison value.
The correction parameter whether said second base station judges need obtain said sub-district is:
Said second base station obtains the gain and/or the phase place of the corresponding radio frequency link of said each antenna according to the situation of each antenna reception detection reference signal in the said neighbor cell;
Compare the gain and/or the phase place of the radio frequency link that each antenna is corresponding in the said neighbor cell in twos said second base station, obtains maximum comparison value and minimum comparison value in the comparison value;
Said second base station judges that the difference of the maximum comparison value that send said maximum comparison value that obtains and said first base station is in the preset scope; And the difference of the minimum comparison value that send said minimum comparison value that obtains and said first base station is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the maximum comparison value that send said maximum comparison value that obtains and said first base station is in outside the preset scope; Perhaps; The difference of the minimum comparison value that send said minimum comparison value that obtains and said base station is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Said sub-district has under the situation of an antenna; The said first base station judgement need be proofreaied and correct the antenna of said sub-district: antenna in cell receives the intensity/signalling channel overall gain of detection reference signal less than preset thresholding, and then judgement need be proofreaied and correct the antenna of said sub-district.
Said first base station also is used for notifying second base station, when said sub-district will be carried out the antenna correction or carried out the antenna correction, and the intensity/signalling channel overall gain of sending said reception detection reference signal.
The correction parameter whether said second base station judges need obtain said sub-district is:
Said second base station obtains the intensity/signalling channel overall gain of antenna reception detection reference signal in the said neighbor cell;
Said second base station judges that the difference of the intensity/signalling channel overall gain of the intensity/signalling channel overall gain of the said reception detection reference signal that obtains and the reception detection reference signal that send said first base station is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the intensity/signalling channel overall gain of the reception detection reference signal that send the intensity of the said reception detection reference signal that obtains/signalling channel overall gain and said first base station is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Said sub-district has under the situation more than an antenna, and said first base station is proofreaied and correct a plurality of antennas in the said sub-district and is:
A reference antenna is selected in said first base station from a plurality of antennas of said sub-district;
Gain and/or phase place that the corresponding radio frequency link of adjustment antenna is treated according to the gain and/or the phase place of the corresponding radio frequency link of said reference antenna in said first base station are adjusted, and notifying user equipment gets into the antenna correction mode;
Said subscriber equipment gets into the antenna correction mode, measures gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna, and said gain and/or phase place are reported said first base station;
Said first base station is according to the gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna of user equipment to report, and judgement need be proceeded antenna and proofread and correct, and then proceeds antenna and proofreaies and correct.
The present invention is based on the antenna correcting method and the system of the transmission of TDD multipoint cooperative; Under TDD multipoint cooperative transmitting scene; Antenna in a sub-district need carry out timing, and the neighbor cell of said sub-district is notified in the base station under the said sub-district, and the antenna in the said sub-district is proofreaied and correct; Neighbor cell need obtain the correction parameter of said sub-district, and then said sub-district sends to said neighbor cell with correction parameter after proofreading and correct end, and said neighbor cell is proofreaied and correct antenna wherein with reference to the correction parameter of receiving.Through the present invention; The situation of carrying out the sub-district that antenna proofreaies and correct if desired is similar with the situation of neighbor cell; So, this neighbor cell is proofreaied and correct antenna wherein according to the correction parameter of this sub-district after can waiting until that end is proofreaied and correct in this sub-district; Thereby can in the validity that guarantees the SRS feedback, raising feedback accuracy, save more additional resource.
Description of drawings
Fig. 1 is the antenna correcting method schematic flow sheet that the present invention is based on the transmission of TDD multipoint cooperative;
Fig. 2 carries out the method for correcting schematic flow sheet for the present invention is a kind of to a plurality of antennas in the sub-district.
Embodiment
Basic thought of the present invention is: under TDD multipoint cooperative transmitting scene, the antenna in a sub-district need carry out timing, and the neighbor cell of said sub-district is notified in the base station under the said sub-district, and the antenna in the said sub-district is proofreaied and correct; Neighbor cell need obtain the correction parameter of said sub-district, and then said sub-district sends to neighbor cell with correction parameter after proofreading and correct end, and neighbor cell is proofreaied and correct antenna wherein with reference to the correction parameter of receiving.
Fig. 1 is the antenna correcting method schematic flow sheet that the present invention is based on the transmission of TDD multipoint cooperative, and as shown in Figure 1, this method comprises:
Step 101: under TDD multipoint cooperative transmitting scene, whether the base station judges under the sub-district need proofread and correct the antenna of said sub-district, if the antenna in the said sub-district is proofreaied and correct execution in step 102; Otherwise, need not carry out antenna and proofread and correct, flow process finishes.
Subscriber equipment generally can be regularly sends detection reference signal to up link, is received by each antenna of its affiliated subdistrict.
Among the present invention; The neighbor cell that timing is notified said sub-district can need be carried out to the antenna of said sub-district in judgement in base station under the said sub-district, and the antenna correction will be carried out in said sub-district, also can be inquired about the antenna correction situation of said sub-district by the neighbor cell of said sub-district; Said sub-district is returned corresponding antenna according to this inquiry and is proofreaied and correct situation; Carrying out antenna and proofreading and correct, then notifying said neighbor cell, said sub-district is being carried out antenna and is being proofreaied and correct.
Said sub-district has under the situation more than an antenna; Base station judges under the sub-district whether need to the antenna of said sub-district proofread and correct can for: the situation that receives detection reference signal according to each antenna of sub-district is obtained the gain and/or the phase place of the corresponding radio frequency link of each antenna; Afterwards; Gain and/or phase place to the corresponding radio frequency link of each antenna of sub-district compare in twos; If the difference of maximum comparison value and minimum comparison value is greater than preset thresholding in the comparison value that obtains, then judgement need be carried out the antenna correction; Otherwise, judge that need not carry out antenna proofreaies and correct.
Accordingly, the neighbor cell of said sub-district is notified in said base station, and said sub-district will be carried out the antenna correction or carried out the antenna timing, and said maximum comparison value and minimum comparison value are sent to said neighbor cell.
Said sub-district has under the situation of an antenna; Base station judgement under the said sub-district need be proofreaied and correct the antenna of said sub-district and is: antenna in cell receives the intensity/signalling channel overall gain of detection reference signal less than preset thresholding, and then judgement need be proofreaied and correct the antenna of said sub-district.
Accordingly, the neighbor cell of said sub-district is notified in said base station, and said sub-district will be carried out antenna and proofreaied and correct or carrying out the antenna timing, and the intensity/signalling channel overall gain of said reception detection reference signal is sent to said neighbor cell.
Need to prove, under the scene of cell configuration single antenna, because of having only one road signal; So there is not the problem of multiple signals phase difference; So need not to carry out the phasing of radio frequency link, only need proofread and correct the gain of radio frequency link, in fact mainly be the gain amplifier of modulation power amplifier.With P
tThe signal strength signal intensity of the SRS that expression UE sends, G
CHThe gain (, being actually the decline of channel) of expression channel less than 1, G
RFThe gain of expression base station radio-frequency link, P
rThe intensity of representing final acknowledge(ment) signal.Then have: P
r=P
t* G
CH* G
RFIf detect P
rToo small, perhaps, equivalently, whole signalling channel (containing channel and radio frequency link) overall gain G
CH* G
RFToo small, the very strong (G of channel fading is described this moment
CHVery little), need carry out antenna and proofread and correct, increase G
RFDecline with compensate for channel.This moment, this sub-district was with measured value P
rOr signalling channel (containing channel and the radio frequency link) gain G of equivalence
CH* G
RFIf the notice neighbor cell is the situation of neighbor cell and the similar (P in this sub-district
rBe worth similar or G
CH* G
RFBe worth similar), then neighbor cell can use the corrected value of this sub-district to proofread and correct.
Step 102: the neighbor cell of said sub-district judges whether to obtain the correction parameter of said sub-district, if judged result is returned to said sub-district, execution in step 103; Otherwise flow process finishes.
Said sub-district has under the situation more than an antenna, neighbor cell judge whether to obtain said sub-district correction parameter can for:
The situation that said neighbor cell receives detection reference signal according to each antenna is wherein obtained the gain and/or the phase place of the corresponding radio frequency link of said each antenna;
Said neighbor cell compares the gain and/or the phase place of the radio frequency link that wherein each antenna is corresponding in twos, obtains maximum comparison value and minimum comparison value in the comparison value;
Said neighbor cell judges that the difference of the maximum comparison value that send the sub-district described in said maximum comparison value that obtains and the step 101 is in the preset scope; And the difference of the minimum comparison value that send sub-district described in said minimum comparison value that obtains and the step 101 is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the maximum comparison value that send sub-district described in said maximum comparison value that obtains and the step 101 is in outside the preset scope; Perhaps; The difference of the minimum comparison value that send sub-district described in said minimum comparison value that obtains and the step 101 is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Said sub-district has under the situation of an antenna, and said neighbor cell judges whether that the correction parameter that need obtain said sub-district is:
Said neighbor cell obtains the wherein intensity/signalling channel overall gain of antenna reception detection reference signal;
Said neighbor cell judges that the difference of the intensity/signalling channel overall gain of the intensity/signalling channel overall gain of the said reception detection reference signal that obtains and the reception detection reference signal that send said sub-district is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the intensity/signalling channel overall gain of the reception detection reference signal that send the intensity of the said reception detection reference signal that obtains/signalling channel overall gain and said sub-district is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Step 103: said sub-district sends to said neighbor cell with correction parameter after proofreading and correct end.
Step 104: said neighbor cell is according to from the correction parameter of said sub-district antenna wherein being proofreaied and correct.
Fig. 2 carries out the method for correcting schematic flow sheet for the present invention is a kind of to a plurality of antennas in the sub-district, and is as shown in Figure 2, and a plurality of antennas in the sub-district are proofreaied and correct and can be comprised:
Step 1021: a reference antenna is selected in said base station from a plurality of antennas of said sub-district.
Here, the selection of reference antenna can have several different methods, for example, can select the poorest antenna of corresponding radio frequency link gain in a plurality of antennas antenna as a reference, also can from a plurality of antennas, select reference antenna according to certain algorithm.
Step 1022: gain and/or phase place that the corresponding radio frequency link of adjustment antenna is treated according to the gain and/or the phase place of the corresponding radio frequency link of said reference antenna in said base station are adjusted, and notifying user equipment gets into the antenna correction mode.
Here, antenna said to be adjusted is one or more in other antennas except that reference antenna in the antenna in cell.
The base station is proofreaied and correct the signaling subscriber equipment through transmitting antenna and is got into the antenna correction mode.
When the gain of treating the corresponding radio frequency link of adjustment antenna according to the gain and/or the phase place of the corresponding radio frequency link of reference antenna and/or phase place are adjusted; General according to the gain of the gain of waiting to adjust the corresponding radio frequency link of antenna and/or the phase place radio frequency link corresponding and/or the size of phase difference value with reference antenna, corresponding this is waited that amplifier and/or the phase shifter of adjusting antenna adjust.
Step 1023: said subscriber equipment gets into the antenna correction mode, measures gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna, and said gain and/or phase place are reported said base station.
General, the subscriber equipment that is under the antenna correction mode suspends the transmission data.
Step 1024: said base station judges whether to proceed antenna and proofreaies and correct, if return step 1022 according to the gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna of user equipment to report; Otherwise flow process finishes.
Here; Judging whether to proceed antenna proofreaies and correct and be: the waiting of user equipment to report adjusted the gain and/or the phase place of gain and/or the phase place of the corresponding radio frequency link of the antenna radio frequency link corresponding with reference antenna and compared; Its error judges that then need not proceed antenna proofreaies and correct in preset error range; Otherwise, also need continue to proofread and correct.
Here; The base station can also preestablish an antenna adjustment threshold value; The antenna adjustment time exceeds this antenna adjustment threshold value, and then the base station stops this antenna correction, after the base station stops the antenna correction; Can use other modes instead and feed back, treat that condition maturity when reducing (traffic carrying capacity or other suitable times) begins new antenna once once more and proofreaies and correct and attempt.
The present invention also proposes a kind of antenna corrective system based on the transmission of TDD multipoint cooperative, comprising: first base station, second base station; Wherein,
Said first base station is used for need carrying out timing to the antenna of the sub-district under said first base station in judgement under the TDD multipoint cooperative transmitting scene, and the antenna in the said sub-district is proofreaied and correct; And need obtain the correction parameter of said sub-district in second base station time, said sub-district proofread and correct finish after, correction parameter is sent to said second base station;
Said second base station is the base station under the neighbor cell of said sub-district, is used to judge whether to obtain the correction parameter of said sub-district, and when judgement need be obtained the correction parameter of said sub-district, judged result is returned to said first base station; And the antenna of the said neighbor cell under it is proofreaied and correct according to correction parameter from said first base station.
Said first base station also is used for need carrying out timing to the antenna of the sub-district under said first base station in judgement, notifies said second base station, and said sub-district will be carried out antenna and proofreaied and correct.
Said second base station also is used for the antenna correction situation of said sub-district is inquired about;
Said first base station also is used in the inquiry of receiving said second base station, and said sub-district carrying out the antenna timing, notifies said neighbor cell, and said sub-district is being carried out antenna and proofreaied and correct.
Said sub-district has under the situation more than an antenna; The said first base station judgement need be proofreaied and correct the antenna of the sub-district under said first base station: gain and/or the phase place of obtaining the corresponding radio frequency link of each antenna according to the situation of each antenna reception detection reference signal of sub-district; Afterwards; Gain and/or phase place to the corresponding radio frequency link of each antenna of sub-district compare in twos; The difference of maximum comparison value and minimum comparison value is greater than preset thresholding in the comparison value that obtains, and then judgement need be carried out the antenna correction.
Said first base station also is used for notifying second base station, when said sub-district will be carried out the antenna correction or carried out the antenna correction, sends said maximum comparison value and minimum comparison value.
The correction parameter whether said second base station judges need obtain said sub-district is:
Said second base station obtains the gain and/or the phase place of the corresponding radio frequency link of said each antenna according to the situation of each antenna reception detection reference signal in the said neighbor cell;
Compare the gain and/or the phase place of the radio frequency link that each antenna is corresponding in the said neighbor cell in twos said second base station, obtains maximum comparison value and minimum comparison value in the comparison value;
Said second base station judges that the difference of the maximum comparison value that send said maximum comparison value that obtains and said first base station is in the preset scope; And the difference of the minimum comparison value that send said minimum comparison value that obtains and said first base station is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the maximum comparison value that send said maximum comparison value that obtains and said first base station is in outside the preset scope; Perhaps; The difference of the minimum comparison value that send said minimum comparison value that obtains and said base station is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Said sub-district has under the situation of an antenna; The said first base station judgement need be proofreaied and correct the antenna of said sub-district: antenna in cell receives the intensity/signalling channel overall gain of detection reference signal less than preset thresholding, and then judgement need be proofreaied and correct the antenna of said sub-district.
Said first base station also is used for notifying second base station, when said sub-district will be carried out the antenna correction or carried out the antenna correction, and the intensity/signalling channel overall gain of sending said reception detection reference signal.
The correction parameter whether said second base station judges need obtain said sub-district is:
Said second base station obtains the intensity/signalling channel overall gain of antenna reception detection reference signal in the said neighbor cell;
Said second base station judges that the difference of the intensity/signalling channel overall gain of the intensity/signalling channel overall gain of the said reception detection reference signal that obtains and the reception detection reference signal that send said first base station is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the intensity/signalling channel overall gain of the reception detection reference signal that send the intensity of the said reception detection reference signal that obtains/signalling channel overall gain and said first base station is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
Said sub-district has under the situation more than an antenna, and said first base station is proofreaied and correct a plurality of antennas in the said sub-district and is:
A reference antenna is selected in said first base station from a plurality of antennas of said sub-district;
Gain and/or phase place that the corresponding radio frequency link of adjustment antenna is treated according to the gain and/or the phase place of the corresponding radio frequency link of said reference antenna in said first base station are adjusted, and notifying user equipment gets into the antenna correction mode;
Said subscriber equipment gets into the antenna correction mode, measures gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna, and said gain and/or phase place are reported said first base station;
Said first base station is according to the gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna of user equipment to report, and judgement need be proceeded antenna and proofread and correct, and then proceeds antenna and proofreaies and correct.
The present invention makes full use of the upstream and downstream link and is operated on the same frequency range and the reciprocity of electromagnetic field, and by the trimming process of base station initiation and control entire antenna, subscriber equipment fully cooperates, to reduce the time that antenna is proofreaied and correct.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (20)
1. antenna correcting method based on TDD multipoint cooperative transmission is characterized in that this method comprises:
Under TDD multipoint cooperative transmitting scene, the base station judgement under the sub-district need be proofreaied and correct the antenna of said sub-district, then the antenna in the said sub-district is proofreaied and correct;
Said neighbor cell judgement need be obtained the correction parameter of said sub-district, then judged result is returned to said sub-district;
Said sub-district sends to said neighbor cell with correction parameter after proofreading and correct end, said neighbor cell is according to from the correction parameter of said sub-district antenna wherein being proofreaied and correct.
2. method according to claim 1; It is characterized in that; Base station judgement under the said sub-district need be carried out timing to the antenna of said sub-district, and this method also comprises: the neighbor cell of said sub-district is notified in said base station, and said sub-district will be carried out antenna and proofreaied and correct.
3. method according to claim 1 is characterized in that, this method also comprises: the neighbor cell of said sub-district is inquired about the antenna correction situation of said sub-district;
The antenna correction is being carried out in said sub-district, then notifies said neighbor cell, and said sub-district is being carried out antenna and proofreaied and correct.
4. according to claim 2 or 3 described methods; It is characterized in that; Said sub-district has under the situation more than an antenna; Base station judgements under the said sub-district need be proofreaied and correct the antenna of said sub-district and be: the situation that the base station under the said sub-district receives detection reference signal according to each antenna of sub-district is obtained the gain and/or the phase place of the corresponding radio frequency link of each antenna, afterwards, the gain and/or the phase place of the radio frequency link of each antenna correspondence of sub-district is compared in twos; The difference of maximum comparison value and minimum comparison value is greater than preset thresholding in the comparison value that obtains, and then judgement need be carried out the antenna correction.
5. method according to claim 4; It is characterized in that; This method also comprises: the neighbor cell of said sub-district is notified in said base station, and said sub-district will be carried out the antenna correction or carried out the antenna timing, and said maximum comparison value and minimum comparison value are sent to said neighbor cell.
6. method according to claim 5 is characterized in that, said neighbor cell judges whether that the correction parameter that need obtain said sub-district is:
The situation that said neighbor cell receives detection reference signal according to each antenna is wherein obtained the gain and/or the phase place of the corresponding radio frequency link of said each antenna;
Said neighbor cell compares the gain and/or the phase place of the radio frequency link that wherein each antenna is corresponding in twos, obtains maximum comparison value and minimum comparison value in the comparison value;
Said neighbor cell judges that the difference of the maximum comparison value that send said maximum comparison value that obtains and said sub-district is in the preset scope; And the difference of the minimum comparison value that send said minimum comparison value that obtains and said sub-district is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the maximum comparison value that send said maximum comparison value that obtains and said sub-district is in outside the preset scope; Perhaps; The difference of the minimum comparison value that send said minimum comparison value that obtains and said sub-district is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
7. according to claim 2 or 3 described methods; It is characterized in that; Said sub-district has under the situation of an antenna; Base station judgement under the said sub-district need be proofreaied and correct the antenna of said sub-district and is: antenna in cell receives the intensity/signalling channel overall gain of detection reference signal less than preset thresholding, and then judgement need be proofreaied and correct the antenna of said sub-district.
8. method according to claim 7; It is characterized in that; This method also comprises: the neighbor cell of said sub-district is notified in said base station; Said sub-district will be carried out antenna and proofreaied and correct or carrying out the antenna timing, and the intensity/signalling channel overall gain of said reception detection reference signal is sent to said neighbor cell.
9. method according to claim 8 is characterized in that, said neighbor cell judges whether that the correction parameter that need obtain said sub-district is:
Said neighbor cell obtains the wherein intensity/signalling channel overall gain of antenna reception detection reference signal;
Said neighbor cell judges that the difference of the intensity/signalling channel overall gain of the intensity/signalling channel overall gain of the said reception detection reference signal that obtains and the reception detection reference signal that send said sub-district is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the intensity/signalling channel overall gain of the reception detection reference signal that send the intensity of the said reception detection reference signal that obtains/signalling channel overall gain and said sub-district is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
10. method according to claim 1 is characterized in that, said sub-district has under the situation more than an antenna, and said base station is proofreaied and correct the antenna in the said sub-district and is:
A reference antenna is selected in said base station from a plurality of antennas of said sub-district;
Gain and/or phase place that the corresponding radio frequency link of adjustment antenna is treated according to the gain and/or the phase place of the corresponding radio frequency link of said reference antenna in said base station are adjusted, and notifying user equipment gets into the antenna correction mode;
Said subscriber equipment gets into the antenna correction mode, measures gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna, and said gain and/or phase place are reported said base station;
Said base station is according to the gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna of user equipment to report, and judgement need be proceeded antenna and proofread and correct, and then proceeds antenna and proofreaies and correct.
11. the antenna corrective system based on the transmission of TDD multipoint cooperative is characterized in that this system comprises: first base station, second base station; Wherein,
Said first base station is used for need carrying out timing to the antenna of the sub-district under said first base station in judgement under the TDD multipoint cooperative transmitting scene, and the antenna in the said sub-district is proofreaied and correct; And need obtain the correction parameter of said sub-district in second base station time, said sub-district proofread and correct finish after, correction parameter is sent to said second base station;
Said second base station is the base station under the neighbor cell of said sub-district, is used to judge whether to obtain the correction parameter of said sub-district, and when judgement need be obtained the correction parameter of said sub-district, judged result is returned to said first base station; And the antenna of the said neighbor cell under it is proofreaied and correct according to correction parameter from said first base station.
12. system according to claim 11 is characterized in that,
Said first base station also is used for need carrying out timing to the antenna of the sub-district under said first base station in judgement, notifies said second base station, and said sub-district will be carried out antenna and proofreaied and correct.
13. system according to claim 11 is characterized in that,
Said second base station also is used for the antenna correction situation of said sub-district is inquired about;
Said first base station also is used in the inquiry of receiving said second base station, and said sub-district carrying out the antenna timing, notifies said neighbor cell, and said sub-district is being carried out antenna and proofreaied and correct.
14. according to claim 12 or 13 described systems; It is characterized in that; Said sub-district has under the situation more than an antenna; The said first base station judgement need be proofreaied and correct the antenna of the sub-district under said first base station: the situation that receives detection reference signal according to each antenna of sub-district is obtained the gain and/or the phase place of the corresponding radio frequency link of each antenna, afterwards, the gain and/or the phase place of the corresponding radio frequency link of each antenna of sub-district is compared in twos; The difference of maximum comparison value and minimum comparison value is greater than preset thresholding in the comparison value that obtains, and then judgement need be carried out the antenna correction.
15. system according to claim 14 is characterized in that,
Said first base station also is used for notifying second base station, when said sub-district will be carried out the antenna correction or carried out the antenna correction, sends said maximum comparison value and minimum comparison value.
16. system according to claim 15 is characterized in that, the correction parameter whether said second base station judges need obtain said sub-district is:
Said second base station obtains the gain and/or the phase place of the corresponding radio frequency link of said each antenna according to the situation of each antenna reception detection reference signal in the said neighbor cell;
Compare the gain and/or the phase place of the radio frequency link that each antenna is corresponding in the said neighbor cell in twos said second base station, obtains maximum comparison value and minimum comparison value in the comparison value;
Said second base station judges that the difference of the maximum comparison value that send said maximum comparison value that obtains and said first base station is in the preset scope; And the difference of the minimum comparison value that send said minimum comparison value that obtains and said first base station is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the maximum comparison value that send said maximum comparison value that obtains and said first base station is in outside the preset scope; Perhaps; The difference of the minimum comparison value that send said minimum comparison value that obtains and said base station is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
17. according to claim 12 or 13 described systems; It is characterized in that; Said sub-district has under the situation of an antenna; The said first base station judgement need be proofreaied and correct the antenna of said sub-district: antenna in cell receives the intensity/signalling channel overall gain of detection reference signal less than preset thresholding, and then judgement need be proofreaied and correct the antenna of said sub-district.
18. system according to claim 17 is characterized in that,
Said first base station also is used for notifying second base station, when said sub-district will be carried out the antenna correction or carried out the antenna correction, and the intensity/signalling channel overall gain of sending said reception detection reference signal.
19. system according to claim 18 is characterized in that, the correction parameter whether said second base station judges need obtain said sub-district is:
Said second base station obtains the intensity/signalling channel overall gain of antenna reception detection reference signal in the said neighbor cell;
Said second base station judges that the difference of the intensity/signalling channel overall gain of the intensity/signalling channel overall gain of the said reception detection reference signal that obtains and the reception detection reference signal that send said first base station is in the preset scope, then confirms to obtain the correction parameter of said sub-district; The difference of the intensity/signalling channel overall gain of the reception detection reference signal that send the intensity of the said reception detection reference signal that obtains/signalling channel overall gain and said first base station is in outside the preset scope, then confirms need not obtain the correction parameter of said sub-district.
20. system according to claim 11 is characterized in that, said sub-district has under the situation more than an antenna, and said first base station is proofreaied and correct a plurality of antennas in the said sub-district and is:
A reference antenna is selected in said first base station from a plurality of antennas of said sub-district;
Gain and/or phase place that the corresponding radio frequency link of adjustment antenna is treated according to the gain and/or the phase place of the corresponding radio frequency link of said reference antenna in said first base station are adjusted, and notifying user equipment gets into the antenna correction mode;
Said subscriber equipment gets into the antenna correction mode, measures gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna, and said gain and/or phase place are reported said first base station;
Said first base station is according to the gain and/or the phase place of waiting to adjust the corresponding radio frequency link of antenna of user equipment to report, and judgement need be proceeded antenna and proofread and correct, and then proceeds antenna and proofreaies and correct.
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| CN201010219967.0A CN102315866B (en) | 2010-07-06 | 2010-07-06 | Method and system for calibrating antennae based on time division duplexing (TDD) coordinated multi-point transmission |
| PCT/CN2010/078042 WO2012003682A1 (en) | 2010-07-06 | 2010-10-22 | Method and system for antenna calibration based on time division duplexing coordinated multi-point transmission |
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| CN201010219967.0A CN102315866B (en) | 2010-07-06 | 2010-07-06 | Method and system for calibrating antennae based on time division duplexing (TDD) coordinated multi-point transmission |
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| WO2012003682A1 (en) | 2012-01-12 |
| CN102315866B (en) | 2015-07-22 |
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