CN101984703B - Method and device for determining downlink power of radio remote unit (RRU) - Google Patents
Method and device for determining downlink power of radio remote unit (RRU) Download PDFInfo
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Abstract
The invention provides a method and device for determining the downlink power of a radio remote unit (RRU). The method comprises the following steps: A, acquiring data transmitted by a feedback channel in the RRU; B, determining the digital domain power of a set frequency range by using the acquired data, wherein the set frequency range comprises a frequency range corresponding to a channel with stable transmission power after a cell is established; and C, determining the downlink power of the RRU by using the determined digital domain power. By adopting the invention, the downlink power of the RRU can be accurately determined when a physical downlink shared channel (PDSCH) does not exist or the resources occupied by the PDSCH are not determined.
Description
Technical field
The present invention relates to wireless communication technology field, particularly determine the method and apparatus of RF remote equipment (RRU) descending power in the LTE system.
Background technology
In the LTE system, base station equipment (NodeB) is a distributed base station equipment, and it is to be made of Base Band Unit equipment (BBU) and RRU, wherein, transmits IQ data and C﹠M data by optical fiber according to the Ir interface protocol between BBU and the RRU, specifically can be as shown in Figure 1.
Wherein, the descending power of RRU is extremely important, such as, be used to equipment alarm that foundation is provided, perhaps be used to the descending power adjustment that reference etc. is provided, therefore, need the descending power of accurate measure R RU.
In the prior art, can only be when the taking resource and determine of physical down link sharing channel (PDSCH), just can accurately measure the descending power of RRU, and do not exist PDSCH or uncertain PDSCH take resource the time, can not accurately determine the descending power of RRU.
Therefore, a kind of do not exist PDSCH or uncertain PDSCH take resource the time, the descending power of accurately determining RRU is the current technical problem that needs to be resolved hurrily.
Summary of the invention
The invention provides the method and apparatus of determining RF remote equipment descending power, so as do not exist PDSCH or uncertain PDSCH take resource the time, accurately determine the descending power of RRU.
The method of a kind of definite RF remote equipment (RRU) descending power, this method are applied to comprise in TDD LTE system or the FDD LTE system:
A gathers the data that feedback path transmits among the RRU;
B utilizes the data of gathering to determine to set the numeric field power of frequency range, and described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district;
C utilizes the numeric field power of determining to determine the descending power of RRU.
The device of a kind of definite RF remote equipment (RRU) descending power, this device comprises:
Collecting unit is used for gathering the data that the RRU feedback path transmits;
First determining unit is used to utilize the data of collection to determine to set the numeric field power of frequency range, and described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district;
Second determining unit is used to utilize definite numeric field power to determine the descending power of RRU.
As can be seen from the above technical solutions, among the present invention, be not to utilize variable PDSCH to take the descending power that resource is determined RRU, but utilize the data of gathering to determine to set the numeric field power of frequency range, utilize the numeric field power of determining to determine the descending power of RRU, wherein, described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district, this obviously do not exist PDSCH or uncertain PDSCH take resource the time, accurately determine the descending power of RRU;
Further, comprise the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district owing to set frequency range, that is to say, the present invention utilizes the data on the channel of corresponding changeless transmitting power to determine the descending power of RRU, this has improved application of the present invention, also can additionally not increase the cost of hardware.
Description of drawings
The basic flow sheet that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is the structural representation of RRU;
The structure drawing of device that Fig. 3 provides for the embodiment of the invention;
Embodiment
The central idea of the embodiment of the invention is: utilize and set section is determined RRU such as the changeless running time-frequency resource of broadcast physical channel (PBCH) descending power, it is not the resource that takies that depends on PDSCH, this obviously do not exist PDSCH or uncertain PDSCH take resource the time, accurately determine the descending power of RRU.
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the basic flow sheet that Fig. 1 provides for the embodiment of the invention.The flow process that the embodiment of the invention provides is widely used, and such as can be applicable in TDD LTE system or the FDD LTE system, as shown in Figure 1, this flow process can may further comprise the steps:
Step 101 is gathered the data that feedback path transmits among the RRU.
Referring to Fig. 2, Fig. 2 is the structural representation of RRU.As shown in Figure 2, descending a plurality of baseband signal is by the synthetic multi-carrier signal of Digital Up Convert (DUC), and send into this synthetic multi-carrier signal to crest factor attenuator (CFR) and carry out peak clipping, the multi-carrier signal of CFR after with peak clipping is sent to the predistorter of digital pre-distortion (DPD), and output to DAC, quadrature modulator and preamplifier behind the process predistorter, multi-carrier signal after will amplifying is at last delivered to power amplifier, and exports via power amplifier.As for feedback signal, its transmission course can be referring to the feedback path among Fig. 2, be specially: feedback signal is through after the decay and mixing of 1/G, again after the ADC sampling, be sent in the pre-distortion parameters estimator, carry out the calculation of parameter of predistortion, the pre-distortion parameters estimator is delivered to predistorter with the parameter that estimates, and by predistorter the signal that receives is carried out pre-distortion.
This step 101 is exactly to gather the data of transmitting on the feedback path among the RRU, is described hereinafter as for the concrete acquisition operations of step 101.
Step 102 utilizes the data of gathering to determine to set the numeric field power of frequency range, and described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district.
Step 103 utilizes the numeric field power of determining to determine the descending power of RRU.
The stable channel of sub-district foundation back transmitting power that comprises with the setting frequency range is that PBCH is an example, and PBCH preceding 4 OFDM symbols of time slot 1 in subframe 0 send, and take system bandwidth middle 72 RE, totally 6 prb on the frequency.Wherein comprise reference signal (RS) in first symbol of time slot 1, skip in the time of data map, and reference signal is that cell reference signals according to 4 antenna ports distributes.The running time-frequency resource of PBCH is set up beginning and can be sent always from the sub-district, in case and sub-district after maximum transmit power is determined when setting up, the transmitting power of PBCH on running time-frequency resource also determined.Therefore, the present invention can utilize the transmitting power of stablizing constant PBCH to determine the descending power of RRU, and this has been avoided utilizing unsettled PDSCH to take the problem that resource can not accurately be determined the RRU descending power.
Preferably, when carrying out the acquisition operations of this step 101, the frequency range of the stable channel correspondence of back transmitting power is set up in the sub-district that needs definite setting frequency range to comprise, and determines the shared time-domain resource of channel of this frequency range correspondence; That gathers feedback path transmission among the RRU is included in the data of transmitting on the described time-domain resource at least.Still channel is that PBCH is an example in the frequency range to set, because PBCH preceding 4 OFDM symbols of time slot 1 in subframe 0 send, therefore, the time-domain resource of determining is preceding 4 OFDM symbols of time slot 1 in the subframe 0, afterwards, and according to definite time period of gathering of the time-domain resource that should determine, wherein, this time period comprises this time-domain resource of determining at least, afterwards, gathers the data of feedback path transmission among the RRU in this time period.Because the time period comprises this time-domain resource of determining at least, therefore, the data of this collection obviously are included in the data of transmitting on the described time-domain resource.
In the step 102, utilize the data of gathering to determine that the numeric field power of setting segment data specifically can be:
Step 1 data that described time-domain resource is transmitted from the extracting data of gathering;
Step 2 is carried out the FFT conversion to the data that extract, and obtains transformation results;
This step 2 can with the existing FFT transformation classes seemingly, repeat no more here.
Step 3 extracts the data of described setting frequency range from transformation results, these data that extract are handled and compensated, and obtains setting the numeric field power of frequency range.
In this step 3, the data that extract are handled when the specific implementation can be according to existing data processing when determining the RRU descending power, such as, to the processing such as data stack that extract.
As for the data that extract are compensated, when specific implementation, can on the basis that the data that extract are handled, carry out.If it is P that the data that extract are handled the result that obtains
Cal, then to compensating of extracting for:
P
val＝P
cal+C
offset
Wherein, P
Val: the numeric field power of setting segment data; C
Offset: offset.
Wherein, C
OffsetThe frequency range corresponding district is relevant with setting.Be that PBCH is an example still to comprise the stable channel of sub-district foundation back transmitting power in the setting frequency range, the PBCH data are used the QPSK modulation, in the sub-district of many antenna ports, use the mode that sends diversity to carry out layer mapping precoding, RS adopts the ZC sequence, and the RE power of Data Position is half of RS power; Therefore, if the base band power of RRU with all symbols all be RS (reference signal) as nominal, on the pairing resource of PBCH, the PBCH power of each symbol and be (6/ (100*2)) of nominal power on the time domain, promptly
In step 103, the descending power of RRU (is designated as P
Ant) can determine by following formula:
P
Ant＝P
val-G
FB-G
FILTER
P
Val: the numeric field power of setting segment data;
G
FB: current data is gathered the link yield value, comprises following 3;
G
PGC_FB: the PGC value that RFU radio frequency mainboard feedback path is provided with;
G
RFMB_FB: RFU radio frequency mainboard feedback path yield value, according to the yield value of temperature and frequency calibration curve calculating;
G
PAU_FB: power amplifier feedback network yield value, according to the yield value of temperature and frequency calibration curve calculating;
G
FILTER: the antenna filter loss.
So far, realized the method for definite RRU descending power that the embodiment of the invention provides by aforesaid operations.
More than method that the embodiment of the invention is provided be described, the device that the embodiment of the invention is provided is described below.
Referring to Fig. 3, the structure drawing of device that Fig. 3 provides for the embodiment of the invention.This device can be applicable in TDDLTE system or the FDD LTE system, and as shown in Figure 3, this device can comprise:
Collecting unit 301 is used for gathering the data that the RRU feedback path transmits;
First determining unit 302 is used to utilize the data of collection to determine to set the numeric field power of frequency range, and described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district; Preferably, in the present embodiment, describedly comprise the sub-district to set up the stable channel of back transmitting power be PBCH.
Second determining unit 303 is used to utilize definite numeric field power to determine the descending power of RRU.
Wherein, collecting unit 301 is gathered the data of transmitting on the time-domain resource that is included in described channel occupancy at least of feedback path transmission among the RRU.
In the present embodiment, can comprise during first determining unit, 302 specific implementations:
Extract subelement 3021, be used for the data that described time-domain resource is transmitted from the extracting data of gathering;
Varitron unit 3022 is used for the data that extract are carried out the FFT conversion, obtains transformation results;
Determine subelement 3023, be used for extracting the data of described setting frequency range, these data that extract are handled and compensated, obtain setting the numeric field power of frequency range from transformation results.
So far, finished the unit describe that the embodiment of the invention provides.
As can be seen from the above technical solutions, among the present invention, be not to utilize variable PDSCH to take the descending power that resource is determined RRU, but utilize the data of gathering to determine to set the numeric field power of frequency range, utilize the numeric field power of determining to determine the descending power of RRU, wherein, described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district, this obviously do not exist PDSCH or uncertain PDSCH take resource the time, accurately determine the descending power of RRU;
Further, comprise the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district owing to set frequency range, that is to say, the present invention utilizes the data on the channel of corresponding changeless transmitting power to determine the descending power of RRU, this has improved application of the present invention, also can additionally not increase the cost of hardware.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (6)
1. the method for definite RF remote equipment (RRU) descending power is characterized in that, this method is applied to comprise in TDD LTE system or the FDD LTE system:
A gathers the data that feedback path transmits among the RRU;
B utilizes the data of gathering to determine to set the numeric field power of frequency range, and described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district; Wherein, utilize the data of gathering to determine that the numeric field power of setting frequency range is specially: B1 the data of transmitting in the time-domain resource of described channel occupancy from the extracting data of gathering; B2 carries out the FFT conversion to the data that extract, and obtains transformation results; B3 extracts the data of described setting frequency range from transformation results, these data that extract are handled and compensated, and obtains setting the numeric field power of frequency range;
C utilizes the numeric field power of determining to determine the descending power of RRU.
2. method according to claim 1 is characterized in that steps A comprises:
Determine the time-domain resource of described channel occupancy;
That gathers feedback path transmission among the RRU is included in the data of transmitting on the described time-domain resource at least.
3. method according to claim 1 is characterized in that, it is Physical Broadcast Channel PBCH that the stable channel of back transmitting power is set up in described sub-district.
4. the device of definite RF remote equipment (RRU) descending power is characterized in that this device comprises: collecting unit, first determining unit and second determining unit;
Wherein, collecting unit is used for gathering the data that the RRU feedback path transmits;
First determining unit, be used to utilize the definite numeric field power of setting frequency range of data of collection, described setting frequency range comprises the frequency range that the stable channel correspondence of back transmitting power is set up in the sub-district, wherein, described first determining unit realizes utilizing the data of gathering to determine to set the numeric field power of frequency range by following extraction subelement, varitron unit and definite subelement:
Extract subelement, be used for the data that the time-domain resource of described channel occupancy is transmitted from the extracting data of gathering;
The varitron unit is used for the data that extract are carried out the FFT conversion, obtains transformation results;
Determine subelement, be used for extracting the data of described setting frequency range, these data that extract are handled and compensated, obtain setting the numeric field power of frequency range from transformation results;
Second determining unit is used to utilize definite numeric field power to determine the descending power of RRU.
5. device according to claim 4 is characterized in that, described collecting unit is gathered the data of transmitting on the time-domain resource that is included in described channel occupancy at least of feedback path transmission among the RRU.
6. device according to claim 4 is characterized in that, describedly comprises the sub-district to set up the stable channel of back transmitting power be Physical Broadcast Channel PBCH.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010535371 CN101984703B (en) | 2010-11-04 | 2010-11-04 | Method and device for determining downlink power of radio remote unit (RRU) |
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| CN 201010535371 CN101984703B (en) | 2010-11-04 | 2010-11-04 | Method and device for determining downlink power of radio remote unit (RRU) |
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| CN101984703A CN101984703A (en) | 2011-03-09 |
| CN101984703B true CN101984703B (en) | 2013-07-31 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102164014B (en) * | 2011-04-22 | 2014-05-07 | 新邮通信设备有限公司 | Radio frequency index testing method and system |
| CN103379504B (en) * | 2012-04-16 | 2018-08-14 | 中兴通讯股份有限公司 | A kind of distributed base station system and its method of data processing |
| CN103457889B (en) * | 2012-05-31 | 2016-05-11 | 京信通信系统（中国）有限公司 | Data processing method, device and RRU based on multinuclear multi-channel radio remote unit RRU |
| CN107801238B (en) * | 2016-09-05 | 2022-08-02 | 中兴通讯股份有限公司 | Method and device for inter-cell power cooperation in LTE scene |
| CN107809291A (en) * | 2017-11-08 | 2018-03-16 | 武汉邮电科学研究院 | A kind of TDD and FDD LTE RRU general standing-wave ratio detecting method |
| US10707979B2 (en) * | 2018-02-13 | 2020-07-07 | Qualcomm Incorporated | Estimating a narrowband reference signal received power parameter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237630A (en) * | 2007-02-01 | 2008-08-06 | 中兴通讯股份有限公司 | RF unit and its signal amplitude adjusting method |
| CN101834677A (en) * | 2010-03-11 | 2010-09-15 | 京信通信系统（中国）有限公司 | Base band power statistic-based standing wave detecting system and method for radio frequency remote system |
| CN101841935A (en) * | 2010-05-12 | 2010-09-22 | 新邮通信设备有限公司 | Single-antenna remote radio unit |
| EP2244376A1 (en) * | 2009-04-23 | 2010-10-27 | Broadcom Corporation | Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages |
| CN101877687A (en) * | 2009-04-28 | 2010-11-03 | 鼎桥通信技术有限公司 | Method for transmitting downlink signal |
-
2010
- 2010-11-04 CN CN 201010535371 patent/CN101984703B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237630A (en) * | 2007-02-01 | 2008-08-06 | 中兴通讯股份有限公司 | RF unit and its signal amplitude adjusting method |
| EP2244376A1 (en) * | 2009-04-23 | 2010-10-27 | Broadcom Corporation | Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages |
| CN101877687A (en) * | 2009-04-28 | 2010-11-03 | 鼎桥通信技术有限公司 | Method for transmitting downlink signal |
| CN101834677A (en) * | 2010-03-11 | 2010-09-15 | 京信通信系统（中国）有限公司 | Base band power statistic-based standing wave detecting system and method for radio frequency remote system |
| CN101841935A (en) * | 2010-05-12 | 2010-09-22 | 新邮通信设备有限公司 | Single-antenna remote radio unit |
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Effective date of registration: 20170831 Address after: 100070, No. 188, building 25, No. eighteen, South Fourth Ring Road, Fengtai District, Beijing, 1, 101 Patentee after: Beijing Haiyun Technology Co.,Ltd. Address before: 510663, No. 3, color road, Science City, Guangzhou Development Zone, Guangdong Patentee before: NEW POSTCOM EQUIPMENT Co.,Ltd. |
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