CN102315868A - Method and system for calibrating antenna of distributed base station - Google Patents
Method and system for calibrating antenna of distributed base station Download PDFInfo
- Publication number
- CN102315868A CN102315868A CN2010102261436A CN201010226143A CN102315868A CN 102315868 A CN102315868 A CN 102315868A CN 2010102261436 A CN2010102261436 A CN 2010102261436A CN 201010226143 A CN201010226143 A CN 201010226143A CN 102315868 A CN102315868 A CN 102315868A
- Authority
- CN
- China
- Prior art keywords
- bbu
- rru
- correction
- antenna
- correct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for calibrating an antenna of a distributed base station. The method mainly comprises the following steps that: when a remote radio-frequency unit (RRU) and a base band unit (BBU) are determined to be capable of calibrating the antenna, the BBU indicates starting of calibration and sends a calibration sequence to the RRU; the RRU receives the calibration sequence and returns the received calibration sequence to the BBU; and the BBU obtains a calibration result by using a calibration algorithm according to the calibration sequence which is returned by the RRU. Moreover, the invention also discloses a system for calibrating the antenna of the distributed base station. An antenna calibration flow is realized by interaction of the BBU and the RRU, so the antenna of a frequency domain of an orthogonal frequency division multiplexing (OFDM) system can be calibrated. By adoption of the method, the amplitude and phase difference of sub-carriers or sub-carrier groups in the OFDM system can be effectively compensated, and better performance is provided for realizing of a wave beam forming function of the OFDM system.
Description
Technical field
The present invention relates to wireless communication system, relate in particular to a kind of antenna correcting method and system of distributed base station based on OFDM (OFDM, Orthogonal Frequency DivisionMultiplexing) technology.
Background technology
Distributed base station equipment is by Base Band Unit (BBU; Base Band Unit) and RF remote unit (RRU; Remote RF Unit) constitutes; Be a kind of base station combination of can the flexible distributed formula installing, RRU links to each other with BBU through Ir (Interface between the RRU and the BBU) interface.
For correctness and the reliability that guarantees wave beam forming, must proofread and correct aerial array, to reduce the amplitude phase error of each passage of aerial array.Therefore, the researching antenna alignment technique is of great practical significance.
In antenna system, many uncertain factors make real aerial array stream shape have array error, thereby seriously influence the performance of base band algorithm.There are two kinds of errors between each radio-frequency channel of aerial array, become error when becoming sum of errors during the difference right and wrong.Wherein, Becoming error when non-is mainly caused by array arrangement; The error of bringing like feeder line difference between the mutual even effect between array element geometric position difference, array element, antenna pattern difference and each array element etc.; These errors do not change with the variation of environment such as temperature, can be through accurately measuring and can proofreading and correct in the BBU side; The time become the inconsistent error of bringing of frequency response that the wearing out of amplifier phase that error is meant that each radio-frequency channel of array changes with temperature and devices such as gain difference, frequency mixer, filter time delay and amplitude-frequency phase-frequency distorition and quadrature modulation demodulator imbalance etc. cause.
Usually, become error during aerial array non-through production process and calibration of power compensation, the time change error need be through being implemented in the wire antenna rectification building-out.
At present; At TD SDMA (TD-SCDMA; Time Division-Synchronous CodcDivision Multiple Access) in the system, adopt the time-domain antenna method of correcting to carry out antenna and proofread and correct, the time-domain antenna bearing calibration estimates that in time domain channel impacts; And independently accomplished by RRU, its process does not need the participation of BBU.
For OFDM (OFDM, Orthogonal Frequency Division Multiplexing) system, its antenna is proofreaied and correct (AC; Antenna Calibration) mode that needs employing frequency domain antenna to proofread and correct like this, just needs BBU and RRU fellowship to accomplish in the antenna trimming process; Therefore, above-mentioned time-domain antenna bearing calibration is inapplicable in ofdm system, and; Use the time-domain antenna bearing calibration; Owing to will do channel estimating in time domain, therefore, also can cause the lifting of the inconsistent or hardware cost of ofdm system hardware configuration.
At present, need to propose a kind of antenna correcting method that more is applicable to ofdm system.
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 of distributed base station, can carry out antenna at frequency domain and proofread and correct and be applicable to ofdm system.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of antenna correcting method of distributed base station, said method comprises: confirm that RRU and BBU can both carry out the antenna timing, beginning is proofreaied and correct in the BBU indication, and sends correction sequence to said RRU; Said RRU receives said correction sequence, and the correction sequence that receives is returned to said BBU; Said BBU obtains correcting result according to the correction sequence that said RRU returns through correcting algorithm.
In such scheme, the process of beginning is proofreaied and correct in said BBU indication, is specially: said BBU is changed to bottom control word preset or that preserve in advance to receive and proofreaies and correct or send out and proofread and correct, and control word is sent to said RRU, indicates up correction or descending correction to begin.
In such scheme, said BBU sends correction sequence to said RRU, specifically comprises: the next radio frames after the up correction of indication begins, and said BBU sends to RRU with said correction sequence; Next radio frames after indicating downlink is proofreaied and correct beginning, said BBU sends to said RRU with said correction sequence.
In such scheme; Said RRU receives said correction sequence; And the correction sequence that receives returned to the process of said BBU; Specifically comprise: carry out up timing, RRU receives said correction sequence, and the receipts passage that the correction sequence that receives is coupled to BBU through correction channel and is used for transmit ascending data between self returns to BBU; Carry out descending timing, RRU receives said correction sequence, and through said passage the correction sequence that receives is coupled to said correction channel and returns to BBU.
In such scheme, before said RRU received said correction sequence, said method also comprised: said RRU receives the control word that said BBU sends, and detects the state of said control word; Proofread and correct or a timing for receiving at the state that detects said control word, receive said correction sequence.
In such scheme, the correction sequence that said BBU returns according to said RRU obtains the process of correcting result through correcting algorithm, specifically comprises:
Said BBU according to received correction sequence, obtains the correcting result of up correction through correcting algorithm when receiving the correction sequence that said RRU returns through said receipts passage; And, when receiving the correction sequence that said RRU returns through said correction channel,, obtain the correcting result of descending correction through correcting algorithm according to received correction sequence.
In such scheme, after said BBU obtained the correcting result of correcting result or descending correction of up correction, said method also comprises: said BBU reset to said control word and does not proofread and correct, and indicates up correction or descending correction to finish.
In such scheme, after said BBU obtained the correcting result of correcting result and descending correction of up correction, said method also comprises: said BBU sent to RRU and proofreaies and correct end; RRU receives said correction end, and returns correction to BBU and finish response message.
In such scheme, said affirmation RRU and BBU can both carry out the process that antenna is proofreaied and correct, and specifically comprise: said BBU confirms self can carry out antenna and proofreaies and correct according to self current state, then proofreaies and correct Indication message to said RRU transmitting antenna; Said RRU receives said antenna and proofreaies and correct Indication message, according to self current state, confirms to carry out antenna and proofreaies and correct, and returns success to BBU and replys; Said BBU receives the successful respond that said RRU returns, and confirms that RRU and BBU can both carry out antenna and proofread and correct.
In such scheme, before confirming that RRU and BBU can both carry out the antenna correction, said method also comprises: RRU initiates antenna and proofreaies and correct through to said BBU transmitting antenna correction request; Perhaps, BBU initiates antenna and proofreaies and correct according to self current state or current needs.
The present invention also provides a kind of antenna corrective system of distributed base station, and said system comprises: RRU and BBU, and wherein, BBU is used to confirm said RRU and self can both carries out the antenna timing that beginning is proofreaied and correct in indication, and sends correction sequence to said RRU; And the correction sequence according to said RRU returns obtains correcting result through correcting algorithm; RRU is used to receive the correction sequence that said BBU sends, and the correction sequence that receives is returned to said BBU.
In such scheme, said BBU comprises: confirmation unit, indicating member, transmitting element, receiving element and computing unit, and wherein, confirmation unit is used to confirm that said RRU and BBU self can both carry out antenna and proofread and correct; Indicating member is used for confirming that at said confirmation unit said RRU and BBU self can both carry out the antenna timing, and beginning is proofreaied and correct in indication; Transmitting element is used for the next radio frames after beginning is proofreaied and correct in said indicating member indication, sends correction sequence to said RRU; Receiving element is used to receive the correction sequence that said RRU returns; Computing unit is used for the correction sequence that receives according to said receiving element, obtains correcting result through correcting algorithm.
In such scheme; Said indicating member specifically is used for, and bottom control word preset or that preserve in advance is changed to receive proofreaies and correct or send out and proofread and correct; And will be changed to and receive proofread and correct or send out a corrected control word and send to said RRU, indicate up correction or descending correction to begin.
In such scheme, said RRU comprises: receiving element and transmitting element, and wherein, receiving element is used to receive the correction sequence that said BBU sends; Transmitting element is used for the correction sequence with said receiving element reception, returns to said BBU.
In such scheme, said RRU also comprises: control word receiving element and detecting unit, and wherein, the control word receiving element is used to receive the control word that the indicating member of said BBU sends; Detecting unit is used to detect the control word that said control word receiving element receives, and detecting said control word state for receiving correction or sending out timing, starts said receiving element, makes said receiving element can receive the correction sequence that said BBU sends.
The antenna correcting method of distributed base station provided by the invention and system; BBU proofreaies and correct beginning through control word to the RRU indication; And to RRU transmission correction sequence; RRU returns received correction sequence to BBU, and the correction sequence that BBU returns according to RRU at last again obtains correcting result through correcting algorithm.The present invention; Realize the antenna correcting process through the fellowship of BBU and RRU, making the frequency domain antenna proofread and correct can realize, therefore; Can be applicable to ofdm system; And carry out antenna through this scheme and proofread and correct, can effectively compensate amplitude, the phase difference of ofdm system sub-carriers or sub carrier group, more performance is provided for realizing ofdm system wave beam forming function.
Description of drawings
Fig. 1 is the realization flow figure of distributed base station antenna correcting method of the present invention;
Fig. 2 is the composition structural representation of distributed base station antenna corrective system of the present invention;
Fig. 3 is the concrete realization flow sketch map of an embodiment of the present invention;
Fig. 4 is a mutual sketch map embodiment illustrated in fig. 3;
Fig. 5 is the concrete realization flow sketch map of another kind of embodiment of the present invention;
Fig. 6 is a mutual sketch map embodiment illustrated in fig. 5.
Embodiment
The antenna correcting method of a kind of distributed base station of the present invention with reference to shown in Figure 1, mainly may further comprise the steps:
Step 101: confirm that RRU and BBU can both carry out the antenna timing, beginning is proofreaied and correct in the BBU indication, and sends correction sequence to said RRU;
Here, said correction sequence is generated by bottom and preserves in advance, or by bottom according to preset principle or generation in real time randomly, specifically can be a kind of orthogonal sequence.
Step 102: said RRU receives said correction sequence, and the correction sequence that receives is returned to said BBU;
Step 103: said BBU obtains correcting result according to the correction sequence that said RRU returns through correcting algorithm.
Here, said correcting result can comprise amplitude and the parameter of phase difference and the working status parameter of each radio-frequency channel between each radio-frequency channel of expression.Said correcting algorithm specifically can be the channel estimating scheduling algorithm.
Wherein, beginning is proofreaied and correct in said BBU indication, and sends correction sequence to said RRU, is specially: said BBU proofreaies and correct beginning through control word to said RRU indication; And the next radio frames after beginning is proofreaied and correct in indication, said correction sequence is sent to said RRU.
Here; BBU is through sending control word to said RRU; The process of beginning is proofreaied and correct in indication; Be specially: that said BBU preserves bottom or preset control word is changed to receive and proofreaies and correct or send out and proofread and correct, and will be changed to receive and proofread and correct or send out a corrected control word and send to said RRU, indicates up correction or descending correction to begin.
Particularly, the state of control word comprises: do not proofread and correct, receive and proofread and correct and send out and proofread and correct, wherein, control word places the receipts timing, carries out up correction; Place and send out timing, carry out descending correction; Place not timing, trimming process finishes or does not begin or proofreaies and correct.
In the practical application, can represent the state of control word, for example, can be respectively represent not proofread and correct, receive and proofread and correct and send out correction that BBU places control word at 0 o'clock, represent the current correcting state not of being with 0,1,2 with the code of setting; BBU places control word at 1 o'clock, and representing current is to receive correcting state, carry out up correction; BBU places control word at 2 o'clock, and representing current is to send out a correcting state, carry out descending correction.
Wherein, said BBU sends correction sequence to said RRU, specifically comprises:
Next radio frames after the up correction of indication begins, said BBU sends to RRU with said correction sequence;
Next radio frames after indicating downlink is proofreaied and correct beginning, said BBU sends to said RRU with said correction sequence.
Particularly, beginning is proofreaied and correct in said BBU indication, and sends correction sequence to said RRU; Can comprise following process: carry out up timing; BBU resets to said control word to receive and proofreaies and correct, and will be changed to receipts corrected control word and send to RRU, indicates up correction to begin; And, said correction sequence is sent to RRU in next radio frames; Carry out descending timing, BBU resets to said control word to send out and proofreaies and correct, and will be changed to a corrected control word and send to RRU, and indicating downlink is proofreaied and correct beginning, and in next radio frames, said correction sequence is sent to said RRU.
Particularly, said RRU receives said correction sequence, and the correction sequence that receives is returned to the process of said BBU, comprising:
Carry out up timing, RRU receives said correction sequence, and the receipts passage that the correction sequence that receives is coupled to BBU through correction channel and is used for transmit ascending data between self returns to BBU; Carry out descending timing, RRU receives said correction sequence, and through said passage the correction sequence that receives is coupled to said correction channel and returns to BBU.
Particularly, carry out up timing, said RRU receives the correction sequence that BBU sends through the Ir interface, and will received correction sequence be coupled to the receipts passage through said correction channel and returns to BBU via the Ir interface; Carry out descending timing, said RRU receives the correction sequence that BBU sends through the Ir interface, and received correction sequence is coupled to correction channel through said passage returns to BBU via the Ir interface.
Here, correction channel is exclusively used in the passage that sends correction data or correction sequence, and transceiver channel that can multiplexing RRU data is a physical channel that is present between RRU and the BBU.
Here, before said RRU received said correction sequence, said method also comprised: said RRU receives the control word that said BBU sends, and detects the state of said control word; Proofread and correct or a timing for receiving at the state that detects said control word, receive said correction sequence.
Particularly, said BBU according to received correction sequence, obtains the correcting result of up correction through correcting algorithm when receiving the correction sequence that said RRU returns through said receipts passage; And, when receiving the correction sequence that said RRU returns through correction channel,, obtain the correcting result of descending correction through correcting algorithm according to received correction sequence.
Here, said BBU is after the correcting result of correcting result that obtains up correction or descending correction, and said method can also comprise: said control word is reset to do not proofread and correct, indicate up correction or descending correction to finish.
Particularly, BBU can be after the correcting result of correcting result that obtains up correction or descending correction, said control word is reset to do not proofread and correct, and the control word after will resetting sends to RRU, finishes to indicate up correction or descending correction through control word.
Wherein, BBU is after the correcting result of correcting result that obtains up correction and descending correction, and said method can also comprise: said BBU sends to RRU and proofreaies and correct end; RRU receives said correction end, and returns correction to BBU and finish response message.
Particularly, said BBU is changed to said control word and does not proofread and correct, and sends to RRU and proofreaies and correct end; RRU receives said correction end, stops the detection of control word, returns to proofread and correct to BBU again and finishes response message.
Wherein, before confirming that RRU and BBU can both carry out the antenna correction, said method also comprises: RRU initiates antenna and proofreaies and correct through to said BBU transmitting antenna correction request; Perhaps, BBU initiates antenna and proofreaies and correct according to self current state or current needs.
Wherein, confirm that RRU and BBU can both carry out the process that antenna is proofreaied and correct, and specifically comprise:
Said BBU confirms self can carry out antenna and proofreaies and correct according to self current state, then proofreaies and correct Indication message to said RRU transmitting antenna; Said RRU receives said antenna and proofreaies and correct Indication message, according to self current state, confirms to carry out antenna and proofreaies and correct, and returns success to BBU and replys; Said BBU receives the successful respond that said RRU returns, and confirms that then RRU and BBU can both carry out antenna and proofread and correct.
Here, when RRU changes at completion self initialization, foundation back, when accomplishing the calibration of power and latency measurement or sub-district or channel gain, need or can carry out the antenna correction.
BBU sets up under the situation about accomplishing in affirmation self initialization completion, latency measurement completion or sub-district, can carry out antenna and proofread and correct.
For realizing said method; The present invention also provides a kind of antenna corrective system of distributed base station, and is as shown in Figure 2, and said system mainly comprises: BBU_21 and RRU_22; Wherein, BBU_21 is used to confirm RRU_22 and self can both carries out the antenna timing that beginning is proofreaied and correct in indication, and sends correction sequence to RRU_22; And the correction sequence according to RRU_22 returns obtains correcting result through correcting algorithm; RRU_22 is used to receive the correction sequence that said BBU_21 sends, and the correction sequence that receives is returned to said BBU_21.
Wherein, said BBU_21 mainly comprises: confirmation unit 211, indicating member 212, transmitting element 213, receiving element 214 and computing unit 215, and wherein, confirmation unit 211 is used to confirm that said RRU_22 and BBU_21 self can both carry out antenna and proofread and correct; Indicating member 212 is used for confirming that at said confirmation unit 211 said RRU and BBU self can both carry out the antenna timing that beginning is proofreaied and correct in indication; Transmitting element 213 is used for the next radio frames after beginning is proofreaied and correct in said indicating member 212 indications, sends said correction sequence to said RRU_22; Receiving element 214 is used to receive the correction sequence that said RRU_22 returns; Computing unit 215 is used for the correction sequence that receives according to said receiving element 214, obtains correcting result through correcting algorithm.
Here, indicating member 212 specifically is used for, and bottom control word preset or that preserve in advance is changed to receive proofreaies and correct or send out and proofread and correct, and will be changed to receive and proofread and correct or send out a corrected control word and send to said RRU, indicates up correction or descending correction to begin.
Wherein, said RRU_22 comprises: receiving element 221 and transmitting element 222, and wherein, receiving element 221 is used to receive the correction sequence that said BBU sends; Transmitting element 222 is used for the correction sequence with said receiving element 221 receptions, returns to said BBU.
Here, RRU_22 can also comprise: control word receiving element 223 and detecting unit 224, and wherein, control word receiving element 223 is used to receive the control word that the indicating member 212 of said BBU sends; Detecting unit 224 is used to detect the control word that said control word receiving element 223 receives; And proofread and correct or send out timing for receiving detecting the control word state that said control word receiving element 223 receives, start receiving element 221 and receive the correction sequence that BBU_21 send.
Adopt the antenna corrective system of distributed base station provided by the present invention, realize the detailed process that antenna is proofreaied and correct, in the preceding text method flow, specify, repeat no more at this.
Embodiment one
With reference to Fig. 3, shown in Figure 4, the RRU side is initiatively initiated the antenna timing, distributed base station antenna trimming process of the present invention, and idiographic flow is following:
Step 301:RRU powers on and accomplishes the back or affirmation need be carried out the antenna timing, and active is to BBU transmitting antenna correction request message;
Step 302:BBU receives the antenna correction request message that RRU sends, and according to self current state, confirms to carry out antenna and proofreaies and correct, and then proofreaies and correct Indication message to the RRU transmitting antenna;
After step 303:RRU receives that antenna is proofreaied and correct indication, confirm self can carry out antenna and proofread and correct, then return success and reply to BBU, otherwise, return failure to BBU and reply;
What step 304:BBU received is successful respond, then initiates antenna and proofreaies and correct, and continues step 305; BBU receives failure and replys, and does not then initiate follow-up antenna and proofreaies and correct, and finishes current trimming process.
Step 305:BBU preserves current bottom or preset control word is set to receive and proofreaies and correct, and the control word after will resetting sends to RRU, indicates up correction to begin, and in next radio frames, with preserving in advance or the correction sequence of generation in real time sends to RRU;
Step 306:RRU receives the control word that said BBU sends; Open the correcting switch that detects control word; The state that detects said control word is proofreaied and correct for receiving, and then receives the correction sequence that BBU sends, and through correction channel the correction sequence that receives is coupled to and receives passage and return to BBU;
The correction sequence that step 307:BBU returns according to RRU obtains the correcting result of up correction through correcting algorithm, and current control word reset to does not proofread and correct, and the control word after will resetting sends to RRU, indicates up correction to finish through control word;
Here, correcting algorithm specifically can be a channel estimation method, and correcting result can comprise amplitude and the parameter of phase difference and the working status parameter of each radio-frequency channel between each radio-frequency channel of expression.
Step 308:BBU preserves current bottom or preset control word is set to send out and proofreaies and correct, and the control word after will resetting sends to RRU, and indicating downlink is proofreaied and correct beginning, and in next radio frames, with preserving in advance or the correction sequence of generation in real time sends to RRU;
Step 309:RRU receives the control word that said BBU sends; The state that detects this control word through said correcting switch is proofreaied and correct for sending out; Then receive the correction sequence that said BBU sends, and again the correction sequence that receives is multiplexed into said correction channel through said passage and returns to BBU;
The correction sequence that step 310:BBU returns according to RRU obtains the correcting result of descending correction through correcting algorithm, and current control word reset to does not proofread and correct, and the control word after will resetting sends to RRU, proofreaies and correct through the control word indicating downlink and finishes;
Step 311:BBU sends the correction end to RRU after the correcting result of correcting result that obtains up correction and descending correction;
After step 312:RRU receives and proofreaies and correct end, close the correcting switch of said detection control word, and return correction to BBU and finish response message;
Step 313:BBU receives the correction end response message that said RRU returns, and trimming process finishes.
Wherein, the up trimming process of step 305-307 and the descending trimming process of step 308-310, the front and back order can be changed.In the practical application, can carry out up correction earlier, also can carry out descending correction earlier, it is fixed to come as required.
Here, the antenna that sends of above-mentioned BBU is proofreaied and correct Indication message, is proofreaied and correct the cell ID that end all can include designated cell; Antenna correction request, successful respond or the failure that RRU returns or sends replied, proofreaied and correct the end response message and also include identical cell ID.
Embodiment two
Like Fig. 5, shown in 6, initiatively initiate the antenna timing by the RRU side, antenna trimming process of the present invention, idiographic flow is following:
Step 501:BBU need carry out antenna and proofread and correct according to self current state, then proofreaies and correct Indication message to the RRU transmitting antenna;
BBU sets up under the situation about accomplishing in affirmation self initialization completion, latency measurement completion or sub-district, need carry out antenna and proofread and correct.
Step 502:RRU confirms self can carry out antenna and proofreaies and correct after receiving the antenna correction indication of BBU transmission, if, then return success and reply to BBU, otherwise, return failure to BBU and reply;
Particularly, RRU accomplishes self accomplishing initialization, the calibration of power, latency measurement, and corresponding district also disposes when accomplishing, and just can carry out antenna and proofread and correct.
Step 503:BBU receives successful respond, then begins antenna and proofreaies and correct, and continues step 504; BBU receives failure and replys, and does not then initiate follow-up antenna and proofreaies and correct, and finishes current trimming process.
Step 504-512: 305-313 is identical with step.
Wherein, the up trimming process of step 504-506 and the descending trimming process of step 507-509, the front and back order also can be changed.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the antenna correcting method of a distributed base station is characterized in that, said method comprises:
Confirm that RRU and BBU can both carry out the antenna timing, beginning is proofreaied and correct in the BBU indication, and sends correction sequence to said RRU;
Said RRU receives said correction sequence, and the correction sequence that receives is returned to said BBU;
Said BBU obtains correcting result according to the correction sequence that said RRU returns through correcting algorithm.
2. the antenna correcting method of distributed base station according to claim 1; It is characterized in that; The process of beginning is proofreaied and correct in said BBU indication; Be specially: said BBU is changed to bottom control word preset or that preserve in advance to receive and proofreaies and correct or send out and proofread and correct, and control word is sent to said RRU, indicates up correction or descending correction to begin.
3. the antenna correcting method of distributed base station according to claim 2; It is characterized in that; Said BBU sends correction sequence to said RRU, specifically comprises: the next radio frames after the up correction of indication begins, and said BBU sends to RRU with said correction sequence; Next radio frames after indicating downlink is proofreaied and correct beginning, said BBU sends to said RRU with said correction sequence.
4. the antenna correcting method of distributed base station according to claim 3 is characterized in that, said RRU receives said correction sequence, and the correction sequence that receives is returned to the process of said BBU, specifically comprises:
Carry out up timing, RRU receives said correction sequence, and the receipts passage that the correction sequence that receives is coupled to BBU through correction channel and is used for transmit ascending data between self returns to BBU; Carry out descending timing, RRU receives said correction sequence, and through said passage the correction sequence that receives is coupled to said correction channel and returns to BBU.
5. according to the antenna correcting method of each described distributed base station of claim 1 to 4; It is characterized in that; Before said RRU received said correction sequence, said method also comprised: said RRU receives the control word that said BBU sends, and detects the state of said control word; Proofread and correct or a timing for receiving at the state that detects said control word, receive said correction sequence.
6. according to the antenna correcting method of each described distributed base station of claim 1 to 4, it is characterized in that the correction sequence that said BBU returns according to said RRU obtains the process of correcting result through correcting algorithm, specifically comprises:
Said BBU according to received correction sequence, obtains the correcting result of up correction through correcting algorithm when receiving the correction sequence that said RRU returns through said receipts passage; And, when receiving the correction sequence that said RRU returns through said correction channel,, obtain the correcting result of descending correction through correcting algorithm according to received correction sequence.
7. the antenna correcting method of distributed base station according to claim 6; It is characterized in that; After said BBU obtains the correcting result of correcting result or descending correction of up correction; Said method also comprises: said BBU resets to said control word and does not proofread and correct, and indicates up correction or descending correction to finish.
8. the antenna correcting method of distributed base station according to claim 6; It is characterized in that; After said BBU obtained the correcting result of correcting result and descending correction of up correction, said method also comprises: said BBU sent to RRU and proofreaies and correct end; RRU receives said correction end, and returns correction to BBU and finish response message.
9. according to the antenna correcting method of claim 1 or 8 described distributed base stations, it is characterized in that said affirmation RRU and BBU can both carry out the process that antenna is proofreaied and correct, and specifically comprise:
Said BBU confirms self can carry out antenna and proofreaies and correct according to self current state, then proofreaies and correct Indication message to said RRU transmitting antenna; Said RRU receives said antenna and proofreaies and correct Indication message, according to self current state, confirms to carry out antenna and proofreaies and correct, and returns success to BBU and replys; Said BBU receives the successful respond that said RRU returns, and confirms that RRU and BBU can both carry out antenna and proofread and correct.
10. the antenna correcting method of distributed base station according to claim 1 is characterized in that, before confirming that RRU and BBU can both carry out the antenna correction, said method also comprises: RRU initiates antenna and proofreaies and correct through to said BBU transmitting antenna correction request; Perhaps, BBU initiates antenna and proofreaies and correct according to self current state or current needs.
11. the antenna corrective system of a distributed base station is characterized in that, said system comprises: RRU and BBU, wherein,
BBU is used to confirm said RRU and self can both carries out the antenna timing that beginning is proofreaied and correct in indication, and sends correction sequence to said RRU; And the correction sequence according to said RRU returns obtains correcting result through correcting algorithm;
RRU is used to receive the correction sequence that said BBU sends, and the correction sequence that receives is returned to said BBU.
12. the antenna corrective system of distributed base station according to claim 11 is characterized in that, said BBU comprises: confirmation unit, indicating member, transmitting element, receiving element and computing unit, wherein,
Confirmation unit is used to confirm that said RRU and BBU self can both carry out antenna and proofread and correct;
Indicating member is used for confirming that at said confirmation unit said RRU and BBU self can both carry out the antenna timing, and beginning is proofreaied and correct in indication;
Transmitting element is used for the next radio frames after beginning is proofreaied and correct in said indicating member indication, sends correction sequence to said RRU;
Receiving element is used to receive the correction sequence that said RRU returns;
Computing unit is used for the correction sequence that receives according to said receiving element, obtains correcting result through correcting algorithm.
13. the antenna corrective system of distributed base station according to claim 12; It is characterized in that; Said indicating member specifically is used for, and bottom control word preset or that preserve in advance is changed to receive proofreaies and correct or send out and proofread and correct; And will be changed to and receive proofread and correct or send out a corrected control word and send to said RRU, indicate up correction or descending correction to begin.
14. the antenna corrective system according to each described distributed base station of claim 11 to 13 is characterized in that, said RRU comprises: receiving element and transmitting element, and wherein, receiving element is used to receive the correction sequence that said BBU sends; Transmitting element is used for the correction sequence with said receiving element reception, returns to said BBU.
15. the antenna corrective system of distributed base station according to claim 14 is characterized in that, said RRU also comprises: control word receiving element and detecting unit, wherein
The control word receiving element is used to receive the control word that the indicating member of said BBU sends;
Detecting unit is used to detect the control word that said control word receiving element receives, and detecting said control word state for receiving correction or sending out timing, starts said receiving element, makes said receiving element can receive the correction sequence that said BBU sends.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010226143.6A CN102315868B (en) | 2010-07-08 | 2010-07-08 | Method and system for calibrating antenna of distributed base station |
| PCT/CN2011/075123 WO2012003749A1 (en) | 2010-07-08 | 2011-06-01 | Method and system for calibrating antenna of distributed base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010226143.6A CN102315868B (en) | 2010-07-08 | 2010-07-08 | Method and system for calibrating antenna of distributed base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102315868A true CN102315868A (en) | 2012-01-11 |
| CN102315868B CN102315868B (en) | 2014-09-10 |
Family
ID=45428726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010226143.6A Active CN102315868B (en) | 2010-07-08 | 2010-07-08 | Method and system for calibrating antenna of distributed base station |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102315868B (en) |
| WO (1) | WO2012003749A1 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103338167A (en) * | 2012-12-31 | 2013-10-02 | 上海华为技术有限公司 | Channel correction method of remote radio unit (RRU), relevant equipment and system |
| CN103442441A (en) * | 2013-08-08 | 2013-12-11 | 大唐移动通信设备有限公司 | Method and device for calibrating antenna |
| CN103595665A (en) * | 2012-08-14 | 2014-02-19 | 华为技术有限公司 | Channel correction method, channel correction apparatus and wireless access system |
| CN104145371A (en) * | 2012-01-24 | 2014-11-12 | 安德鲁有限责任公司 | Multi-element antenna calibration technique |
| WO2014183662A1 (en) * | 2013-05-15 | 2014-11-20 | 华为技术有限公司 | Signal adjusting method, apparatus, and cell |
| WO2014198233A1 (en) * | 2013-06-13 | 2014-12-18 | 华为技术有限公司 | Inter-multi-rru channel calibration method and device |
| WO2015014243A1 (en) * | 2013-07-29 | 2015-02-05 | 华为技术有限公司 | Correction method for channels, and mutual correction method, device and system for channels |
| WO2015035948A1 (en) * | 2013-09-13 | 2015-03-19 | 华为技术有限公司 | Remote radio frequency unit channel correction method, device and system |
| CN103117786B (en) * | 2013-01-18 | 2015-10-07 | 大唐移动通信设备有限公司 | A kind of antenna array calibration method and system |
| WO2016082567A1 (en) * | 2014-11-28 | 2016-06-02 | 中兴通讯股份有限公司 | Method and apparatus for correcting data transmission delay |
| WO2017206080A1 (en) * | 2016-05-31 | 2017-12-07 | 华为技术有限公司 | Method and apparatus for channel calibration between radio remote units (rrus) |
| WO2017215467A1 (en) * | 2016-06-17 | 2017-12-21 | 中兴通讯股份有限公司 | Processing device, bbu, rru, and antenna correction method |
| CN108260141A (en) * | 2016-12-29 | 2018-07-06 | 中兴通讯股份有限公司 | Antenna calibration starts the methods, devices and systems of time with determining antenna calibration |
| WO2019014889A1 (en) * | 2017-07-20 | 2019-01-24 | 华为技术有限公司 | Beam tracking method, rru, bbu and base station |
| WO2019029411A1 (en) * | 2017-08-09 | 2019-02-14 | 维沃移动通信有限公司 | Beam indication processing method, mobile terminal and network side device |
| US10432327B2 (en) | 2016-07-30 | 2019-10-01 | Huawei Technologies Co., Ltd. | Antenna array calibration method and apparatus |
| CN113992279A (en) * | 2020-07-27 | 2022-01-28 | 北京佰才邦技术股份有限公司 | Interaction method of antenna calibration signaling, radio frequency unit, baseband processing unit and base station |
| CN114079517A (en) * | 2020-08-20 | 2022-02-22 | 北京佰才邦技术股份有限公司 | Antenna calibration method, device and control equipment |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856273B (en) * | 2012-12-05 | 2016-07-06 | 华为技术有限公司 | The method and apparatus of radio-frequency channel correction between interior correction RRU |
| US9642107B1 (en) * | 2016-08-01 | 2017-05-02 | Space Systems/Loral, Inc. | Multi-channel satellite calibration |
| CN114189291B (en) * | 2020-09-15 | 2023-12-05 | 北京佰才邦技术股份有限公司 | Antenna calibration method, remote radio unit and baseband processing unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383647A (en) * | 2007-09-06 | 2009-03-11 | 大唐移动通信设备有限公司 | Method and device for calibrating operation antenna |
| CN101483459A (en) * | 2008-01-11 | 2009-07-15 | 鼎桥通信技术有限公司 | Calibration method for intelligent antenna |
| CN101505179A (en) * | 2008-02-04 | 2009-08-12 | 大唐移动通信设备有限公司 | Independent self-calibration method and system for remote equipment, baseband equipment |
-
2010
- 2010-07-08 CN CN201010226143.6A patent/CN102315868B/en active Active
-
2011
- 2011-06-01 WO PCT/CN2011/075123 patent/WO2012003749A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383647A (en) * | 2007-09-06 | 2009-03-11 | 大唐移动通信设备有限公司 | Method and device for calibrating operation antenna |
| CN101483459A (en) * | 2008-01-11 | 2009-07-15 | 鼎桥通信技术有限公司 | Calibration method for intelligent antenna |
| CN101505179A (en) * | 2008-02-04 | 2009-08-12 | 大唐移动通信设备有限公司 | Independent self-calibration method and system for remote equipment, baseband equipment |
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104145371A (en) * | 2012-01-24 | 2014-11-12 | 安德鲁有限责任公司 | Multi-element antenna calibration technique |
| US9780447B2 (en) | 2012-01-24 | 2017-10-03 | Commscope Technologies Llc | Multi-element antenna calibration technique |
| CN104145371B (en) * | 2012-01-24 | 2016-08-24 | 康普技术有限责任公司 | Antenna with multiple radiators collimation technique |
| CN103595665A (en) * | 2012-08-14 | 2014-02-19 | 华为技术有限公司 | Channel correction method, channel correction apparatus and wireless access system |
| CN103338167B (en) * | 2012-12-31 | 2016-06-22 | 上海华为技术有限公司 | The channel correcting method of long-distance radio frequency unit and relevant device and system |
| CN103338167A (en) * | 2012-12-31 | 2013-10-02 | 上海华为技术有限公司 | Channel correction method of remote radio unit (RRU), relevant equipment and system |
| CN103117786B (en) * | 2013-01-18 | 2015-10-07 | 大唐移动通信设备有限公司 | A kind of antenna array calibration method and system |
| WO2014183662A1 (en) * | 2013-05-15 | 2014-11-20 | 华为技术有限公司 | Signal adjusting method, apparatus, and cell |
| US9893779B2 (en) | 2013-06-13 | 2018-02-13 | Huawei Technologies Co., Ltd. | Method and apparatus for channel calibration among multiple RRUs |
| WO2014198233A1 (en) * | 2013-06-13 | 2014-12-18 | 华为技术有限公司 | Inter-multi-rru channel calibration method and device |
| CN104244296A (en) * | 2013-06-13 | 2014-12-24 | 华为技术有限公司 | Correcting method and device for channels between multiple RRUs |
| CN104244296B (en) * | 2013-06-13 | 2018-02-06 | 华为技术有限公司 | Channel correcting method and device between more RRU |
| CN104348769B (en) * | 2013-07-29 | 2017-11-28 | 华为技术有限公司 | The mutual bearing calibration of channel correcting method, passage, apparatus and system |
| CN104348769A (en) * | 2013-07-29 | 2015-02-11 | 华为技术有限公司 | Channel correction method, channel mutual correction method, device and system |
| WO2015014243A1 (en) * | 2013-07-29 | 2015-02-05 | 华为技术有限公司 | Correction method for channels, and mutual correction method, device and system for channels |
| CN103442441A (en) * | 2013-08-08 | 2013-12-11 | 大唐移动通信设备有限公司 | Method and device for calibrating antenna |
| WO2015035948A1 (en) * | 2013-09-13 | 2015-03-19 | 华为技术有限公司 | Remote radio frequency unit channel correction method, device and system |
| US10164799B2 (en) | 2013-09-13 | 2018-12-25 | Huawei Technologies Co., Ltd. | Method, apparatus, and system for correcting channel of remote radio unit |
| CN105704806A (en) * | 2014-11-28 | 2016-06-22 | 中兴通讯股份有限公司 | Correcting method and device of data transmission time delay |
| WO2016082567A1 (en) * | 2014-11-28 | 2016-06-02 | 中兴通讯股份有限公司 | Method and apparatus for correcting data transmission delay |
| CN105704806B (en) * | 2014-11-28 | 2020-06-12 | 中兴通讯股份有限公司 | Method and device for correcting data transmission delay |
| WO2017206080A1 (en) * | 2016-05-31 | 2017-12-07 | 华为技术有限公司 | Method and apparatus for channel calibration between radio remote units (rrus) |
| US10939307B2 (en) | 2016-05-31 | 2021-03-02 | Huawei Technologies Co., Ltd. | Method and apparatus for calibrating channel between radio remote units RRUs |
| WO2017215467A1 (en) * | 2016-06-17 | 2017-12-21 | 中兴通讯股份有限公司 | Processing device, bbu, rru, and antenna correction method |
| US10432327B2 (en) | 2016-07-30 | 2019-10-01 | Huawei Technologies Co., Ltd. | Antenna array calibration method and apparatus |
| CN108260141A (en) * | 2016-12-29 | 2018-07-06 | 中兴通讯股份有限公司 | Antenna calibration starts the methods, devices and systems of time with determining antenna calibration |
| WO2019014889A1 (en) * | 2017-07-20 | 2019-01-24 | 华为技术有限公司 | Beam tracking method, rru, bbu and base station |
| WO2019029411A1 (en) * | 2017-08-09 | 2019-02-14 | 维沃移动通信有限公司 | Beam indication processing method, mobile terminal and network side device |
| CN113992279A (en) * | 2020-07-27 | 2022-01-28 | 北京佰才邦技术股份有限公司 | Interaction method of antenna calibration signaling, radio frequency unit, baseband processing unit and base station |
| CN113992279B (en) * | 2020-07-27 | 2024-03-15 | 北京佰才邦技术股份有限公司 | Interaction method of antenna calibration signaling, radio frequency unit, baseband processing unit and base station |
| CN114079517A (en) * | 2020-08-20 | 2022-02-22 | 北京佰才邦技术股份有限公司 | Antenna calibration method, device and control equipment |
| CN114079517B (en) * | 2020-08-20 | 2024-01-26 | 北京佰才邦技术股份有限公司 | Antenna calibration method, device and control equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012003749A1 (en) | 2012-01-12 |
| CN102315868B (en) | 2014-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102315868A (en) | Method and system for calibrating antenna of distributed base station | |
| US10244499B2 (en) | UE compensated timing advance | |
| CN103141130B (en) | The method of base station and operation base station | |
| CN103634037B (en) | Beam forming method and device | |
| US8254997B2 (en) | Apparatus and method for 4-beamforming using radio units having two paths in wireless communication system | |
| CN101753185B (en) | A kind of methods, devices and systems realizing multi-cell multi-antenna calibration | |
| CN105830357B (en) | The multi-beam for providing the intertexture of concurrent beam selection, automatic growth control (AGC) and automatic frequency correction (AFC) obtains waveform | |
| EP3537625B1 (en) | Device and method for detecting beam misalignment in wireless communication system | |
| CN103190087A (en) | Implicit and explicit channel sounding for beamforming | |
| JP2008187552A (en) | Communication system with inter-base-station control channel, and base stations | |
| KR20200099158A (en) | Method and apparatus for performing location tracking using drones | |
| CN116171611A (en) | Uplink timing and frequency synchronization | |
| KR100958463B1 (en) | Radio communication system, base station, mobile station, radio communication method, and computer-readable recording medium | |
| KR20230050282A (en) | Apparatus and method for tracking synchronization in wireless communication system | |
| CN113890702A (en) | Beam indication method, device, terminal and network side equipment | |
| US20220232504A1 (en) | Uplink transmission timing in non-terrestrial networks | |
| US10581544B2 (en) | Setting a time reference in a communications network | |
| CN101500248A (en) | Antenna calibration method and apparatus | |
| CN109951264B (en) | Method, apparatus and computer readable medium for communication | |
| CN103475395A (en) | Antenna correction method, device and system | |
| US20230131305A1 (en) | Method and apparatus for timing advance adjustment | |
| JP6247999B2 (en) | Distributed antenna system and delay correction method in distributed antenna system | |
| CN102790636B (en) | Method for transmitting intelligent antenna calibration sequence | |
| CN108881091B (en) | Phase difference estimation method, phase tracking reference signal indication method and device | |
| CN103595514A (en) | A method and a base station for carrying out calibration on data transmitted by cooperative AP points |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20120111 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Method and system for calibrating antenna of distributed base station Granted publication date: 20140910 License type: Common License Record date: 20151123 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |