CN102065462B - Method and device for measuring noise interference - Google Patents
Method and device for measuring noise interference Download PDFInfo
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- CN102065462B CN102065462B CN 201110023695 CN201110023695A CN102065462B CN 102065462 B CN102065462 B CN 102065462B CN 201110023695 CN201110023695 CN 201110023695 CN 201110023695 A CN201110023695 A CN 201110023695A CN 102065462 B CN102065462 B CN 102065462B
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Abstract
The invention discloses a method and device for measuring noise interference, relating to the technical field of mobile communications. The method comprises the following steps of measuring a noise interference power PN with a noise interference measuring method based on pilot frequency; if the transmitting power of a business data signal is not consistent with the transmitting power of a pilot frequency signal, adjusting the power of the received business data signal and the power of the received pilot frequency signal to remove the interference caused by inconsistence of transmitting powers; computing the average power of the received business data signal and the average power of the received pilot frequency signal, and obtaining the power value PI according to the difference value of the two average powers; and adding PN to PI to obtain the final noise interference power of the business data. The technical proposal of the invention can accurately measure the actual noise interference and improve system stability.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of noise jamming method of measurement and device.
Background technology
Signal to Interference plus Noise Ratio (SINR, Signal to Interference plus NoiseRatio) refers to: the ratio of the intensity of the intensity of the useful signal that receives and the Noise and Interference that receives.SINR is an important parameter of reflection channel quality, accurately estimates SINR and is communication system and carry out adaptive coding and modulating and carry out the necessary condition of operation such as power control.
When the networking of Long Term Evolution (LTE) system same frequency, cell reference signals (CRS, Cell Reference Signal) there is frequency shift (FS) (frequency shifting) scheme can avoid the interference between adjacent cell, but the upper presence of intercell interference of Physical Downlink Shared Channel (PDSCH) is inevitable, in this case, the channel situation of CRS and PDSCH experience is difference to some extent, so existing noise and the disturbed condition that may not reflect actual PDSCH based on noise and the interferometry of CRS technology.
In addition, in the communication system based on OFDM (OFDM) technology, existing technical scheme based on pilot tone (as: being transformed into disclosed method etc. in the method for time domain and the patent document that the patent No. is 200610138230.X based on DFT) can both be measured noise and the disturbed condition of pilot frequency locations preferably.But, in the actual identical networking of LTE, because the suffered disturbed condition of pilot frequency locations and data division may be different, like this based on the good response data noise jamming situation partly of the measurement of pilot tone, and then affect systematic function.
In sum, existing noise jamming method of measurement can not be measured actual noise jamming exactly, so that systematic function descends.
Summary of the invention
The invention provides a kind of noise jamming method of measurement, the method can be measured actual noise jamming more exactly, improves systematic function.
The present invention also provides a kind of noise jamming measurement mechanism, and this device can be measured actual noise jamming more exactly, improves systematic function
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of noise jamming method of measurement, the method comprises:
Utilization measures noise-plus-interference power P based on the noise jamming method of measurement of pilot tone
N
If the transmitting power of business datum signal and the transmitting power of pilot signal are inconsistent, then adjust the power of the business datum signal that receives and the power of pilot signal, therefrom remove the inconsistent impact of transmitting power;
The average power of the average power of the business datum signal that calculating receives and the pilot signal that receives, and foundation difference between the two obtain performance number P
I
With P
NAnd P
IAddition obtains the final suffered noise-plus-interference power of business datum signal.
In said method, the business datum signal that described adjustment receives and the power of pilot signal, therefrom removing the inconsistent impact of transmitting power comprises: according to the relation of the multiple between the transmitting power of the transmitting power of business datum signal and pilot signal, the power of the power of the business datum signal that receives and pilot signal is carried out convergent-divergent process.
In said method, the average power of the average power of the business datum signal that described calculating receives and the pilot signal that receives, and foundation difference between the two obtain performance number P
IComprise: if receive the average power of business datum signal and the average power of the pilot signal that receives between difference surpass default threshold value, then P
IEqual this difference; Otherwise P
IEqual 0.
In said method, the average power of the average power of the business datum signal that described calculating receives and the pilot signal that receives comprises: the average power of the business datum signal that utilizes corresponding time domain and/or frequency domain resource to calculate to receive and the average power of the pilot signal that receives.
In said method, when calculating the noise jamming of LTE system down link, calculate the average power of all data resource elements of first symbol of descending sub frame, as the average power of the business datum signal that receives.
The invention also discloses a kind of noise jamming measurement mechanism, this device comprises: the first noise jamming measurement module, the second noise jamming measurement module and summation module, wherein:
The first noise jamming measurement module is used for utilizing the noise jamming method of measurement based on pilot tone, measures noise-plus-interference power P
N, and with P
NSend to summation module;
The second noise jamming measurement module, be used for when the transmitting power of the transmitting power of business datum signal and pilot signal is inconsistent, the power of the business datum signal that adjustment receives and the power of pilot signal, therefrom remove the inconsistent impact of transmitting power, then calculate the average power of the business datum signal that receives and the average power of the pilot signal that receives, and foundation difference between the two, obtain performance number P
I, with P
ISend summation module;
Summation module is used for P
NAnd P
IAddition obtains the final suffered noise-plus-interference power of business datum signal.
In said apparatus, described the second noise jamming measurement module, be used for according to the multiple relation between the transmitting power of the transmitting power of business datum signal and pilot signal, the power of the power of the business datum signal that receives and pilot signal is carried out convergent-divergent process, therefrom to remove the inconsistent impact of transmitting power.
In said apparatus, described the second noise jamming measurement module when being used for difference between the average power of the average power that receives the business datum signal and the pilot signal that receives and surpassing the threshold value of presetting, makes P
IEqual this difference; Otherwise make P
IEqual 0.
In said apparatus, described the second noise jamming measurement module, the average power of the business datum signal that is used for utilizing corresponding time domain and/or frequency domain resource to calculate and receives and the average power of the pilot signal that receives.
In said apparatus, described the second noise jamming measurement module, be used for when calculating the noise jamming of LTE system down link, calculating the average power of all data resource elements of first symbol of descending sub frame, as the average power of the business datum signal that receives.
As seen by above-mentioned, the present invention is this, utilizes the noise jamming method of measurement based on cell reference signals CRS, measures noise-plus-interference power P
NThe power of the business datum signal that adjustment receives and the power of pilot signal are therefrom removed the inconsistent impact of transmitting power, then calculate the average power of the business datum signal that receives and the average power of the pilot signal that receives, and foundation difference between the two, obtain performance number P
I, with P
NAnd P
IAddition obtains the technical scheme of the suffered noise-plus-interference power of final business datum signal, owing to considered performance number P
I, the noise jamming of the more approaching reality of noise-plus-interference power that therefore finally obtains, and then can improve systematic function.
Description of drawings
Fig. 1 is the flow chart of a kind of noise jamming method of measurement among the present invention;
Fig. 2 is the composition structural representation of a kind of noise jamming measurement mechanism among the present invention.
Embodiment
Improved noise jamming measuring technique scheme provided by the present invention is based on following analysis and draws, and describes as an example of the LTE system down link example here:
When interfered cell was unloaded, the SINR that the current interference noise Measurement Algorithm based on pilot tone is surveyed was not accurate enough, along with the change of signal noise ratio (SNR) is large, survey SINR will be more inaccurate.Trace it to its cause, after actual arranging net, the shared symbol of its pilot tone of neighbor cell does not overlap usually, like this when adjacent cell is unloaded, adjacent cell mainly is the impact of pilot tone on the interference of this residential quarter, and common data portion has interference (and the data that only pilot tone are listed as have interference), causes therefrom based on the estimated noise jamming out of pilot tone not accurate enough.
According to characteristics of signals, in the transmitting power of the pilot signal situation consistent with the transmitting power of business datum signal, the average power of the business datum signal of reception equates substantially with the average power of the pilot signal of reception.Based on this principle, when adjacent cell is unloaded, the suffered interference of the business datum signal of this residential quarter can be subtracted each other by the average power of the average power of business datum signal and pilot signal and be obtained (but in order to reduce the impact of and interferometry jitter error large because of the suffered interference ratio business datum of pilot tone, can only get the value above appointed threshold), this interference and the noise jamming addition of surveying based on the Measurement Algorithm of pilot tone are just obtained the suffered interference noise of final service data division.When the transmitting power of pilot signal and business datum signal was different, before calculating, the processing that can remove the transmitting power differentia influence to two signals that receive first was adjusted into the consistent situation of transmitting power with it and carries out above-mentioned calculating again and get final product.
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.
Fig. 1 is the flow chart of a kind of noise jamming method of measurement among the present invention.As shown in Figure 1, the method may further comprise the steps:
In this step, can adopt the existing method that is transformed into time domain based on DFT to measure noise-plus-interference power P
NPerhaps also can adopt existing noise jamming method of measurement based on cell reference signals CRS to measure noise-plus-interference power P
N, for example, adopting the patent No. is disclosed method in the patent document of 200610138230.X.
If the transmitting power of business datum signal is consistent with the transmitting power of pilot signal, then need not to carry out this step.
In this step, can be according to the relation of the multiple between the transmitting power of the transmitting power of business datum signal and pilot signal, the power of the power of the business datum signal that receives and pilot signal is carried out convergent-divergent process, to reach the purpose of therefrom removing the inconsistent impact of transmitting power.For example, the transmitting power of business datum signal is 1.5 times of transmitting power of pilot channel, and then the power with the business datum signal that receives dwindles 1.5 times, perhaps with 1.5 times of the power amplifications of the pilot signal that receives.
In this step, if receive the average power of business datum signal and the average power of the pilot signal that receives between difference surpass default threshold value λ, then P
IEqual this difference; Otherwise P
IEqual 0.For example, when λ is positive number, if described difference drops in [0, λ] scope, P then
IEqual 0, otherwise, P
IEqual this difference; When perhaps λ is positive number, if described difference drops in [λ, 0] scope, P then
IEqual 0, otherwise, P
IEqual this difference; Again or λ when being positive number, set a scope [λ, λ], if described difference drops within this scope, P then
IEqual 0, otherwise, P
IEqual this difference.The benefit of doing like this is to reduce impact large because of the suffered interference ratio data of pilot tone and the interferometry shake.The value of λ can be decided according to actual conditions.
In this step, the average power of the average power of the business datum signal that utilizes corresponding time domain and/or frequency domain resource to calculate to receive and the pilot signal that receives.That is to say and to calculate with the actual shared resource of user, do not limit time domain or frequency domain resource.Being used for choosing of resource that calculating noise disturbs, both can be time domain, also can be frequency domain, combination that can also time-frequency domain.
For example, when calculating the noise jamming of LTE system down link, can calculate the average power of all data resource elements of first symbol of descending sub frame, as the average power of the business datum signal that receives.This is because first descending symbol (PDCCH) of each descending sub frame substantially all takes in the realization of LTE, first OFDM symbol that takes off capable subframe calculates, the symbol of average is relatively more like this, and resulting interference power is to more relatively accurate.
In this step, with P
NAnd P
IAddition obtains the final suffered noise-plus-interference power of business datum part, and then can calculate exactly SINR, correct assessment channel quality carries out adaptive coding and modulating and carries out the operation such as power control providing necessary foundation, the Effective Raise systematic function to system.
Need to prove, be illustrated as an example of the LTE system example in the above-described embodiments, but such scheme provided by the present invention also is applicable to other based in OFDM and the similar system thereof.The solution of the present invention also is not limited to calculate the noise jamming of down link, and the noise jamming that also can be applicable to up link is calculated.Noise jamming for down link is calculated, and can realize such scheme in UE, calculates for the noise jamming of up link, can realize such scheme in the base station.
Based on above-described embodiment, provide the composition structure of a kind of noise jamming measurement mechanism among the present invention.
Fig. 2 is the composition structural representation of a kind of noise jamming measurement mechanism among the present invention.As shown in Figure 2, this device comprises: the first noise jamming measurement module 201, the second noise jamming measurement module 202 and summation module 203, wherein:
The first noise jamming measurement module 201 is used for utilizing the noise jamming method of measurement based on pilot tone, measures noise-plus-interference power P
N, and with P
NSend to summation module 203;
The second noise jamming measurement module 202, be used for when the transmitting power of the transmitting power of business datum signal and pilot signal is inconsistent, the power of the business datum signal that adjustment receives and the power of pilot signal, therefrom remove the inconsistent impact of transmitting power, then calculate the average power of the business datum signal that receives and the average power of the pilot signal that receives, and foundation difference between the two, obtain performance number P
I, with P
I Send summation module 203;
In device shown in Figure 2, described the second noise jamming measurement module 202, be used for according to the multiple relation between the transmitting power of the transmitting power of business datum signal and pilot signal, the power of the power of the business datum signal that receives and pilot signal is carried out convergent-divergent process, therefrom to remove the inconsistent impact of transmitting power.
In device shown in Figure 2, described the second noise jamming measurement module 202 when being used for difference between the average power of the average power that receives the business datum signal and the pilot signal that receives and surpassing the threshold value of presetting, makes P
IEqual this difference; Otherwise make P
IEqual 0.
In device shown in Figure 2, described the second noise jamming measurement module 202, the average power of the business datum signal that is used for utilizing corresponding time domain and/or frequency domain resource to calculate and receives and the average power of the pilot signal that receives.
In device shown in Figure 2, described the second noise jamming measurement module 202, be used for when calculating the noise jamming of LTE system down link, calculating the average power of all data resource elements of first symbol of descending sub frame, as the average power of the business datum signal that receives.
As seen by above-mentioned, the present invention is this, utilizes the noise jamming method of measurement based on cell reference signals CRS, measures noise-plus-interference power P
NThe power of the business datum signal that adjustment receives and the power of pilot signal are therefrom removed the inconsistent impact of transmitting power, then calculate the average power of the business datum signal that receives and the average power of the pilot signal that receives, and foundation difference between the two, obtain performance number P
I, with P
NAnd P
IAddition obtains the technical scheme of the suffered noise-plus-interference power of final business datum signal, owing to considered performance number P
I, the noise jamming of the more approaching reality of noise-plus-interference power that therefore finally obtains, and then can improve systematic function.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. noise jamming method of measurement is characterized in that the method comprises:
Utilization measures noise-plus-interference power P based on the noise jamming method of measurement of pilot tone
N
If the transmitting power of business datum signal and the transmitting power of pilot signal are inconsistent, then adjust the power of the business datum signal that receives and the power of pilot signal, therefrom remove the inconsistent impact of transmitting power;
The average power of the average power of the business datum signal that calculating receives and the pilot signal that receives, and according between the two difference, obtain performance number P
I
With P
NAnd P
IAddition obtains the final suffered noise-plus-interference power of business datum signal.
2. method according to claim 1 is characterized in that, the business datum signal that described adjustment receives and the power of pilot signal are therefrom removed the inconsistent impact of transmitting power and comprised:
According to the relation of the multiple between the transmitting power of the transmitting power of business datum signal and pilot signal, the power of the power of the business datum signal that receives and pilot signal is carried out convergent-divergent process.
3. method according to claim 1 is characterized in that, the average power of the average power of the business datum signal that described calculating receives and the pilot signal that receives, and according between the two difference, obtain performance number P
IComprise:
If the difference between the average power of the pilot signal that receives the average power of business datum signal and receive surpasses default threshold value, then P
IEqual this difference; Otherwise P
IEqual 0.
4. each described method in 3 according to claim 1 is characterized in that the average power of the business datum signal that described calculating receives comprises with the average power of the pilot signal that receives:
The average power of the average power of the business datum signal that utilizes corresponding time domain and/or frequency domain resource to calculate to receive and the pilot signal that receives.
5. method according to claim 4 is characterized in that, the average power of the business datum signal that described calculating receives comprises:
When calculating the noise jamming of LTE system down link, calculate the average power of all data resource elements of first symbol of descending sub frame, as the average power of the business datum signal that receives.
6. a noise jamming measurement mechanism is characterized in that, this device comprises: the first noise jamming measurement module, the second noise jamming measurement module and summation module, wherein:
The first noise jamming measurement module is used for utilizing the noise jamming method of measurement based on pilot tone, measures noise-plus-interference power P
N, and with P
NSend to summation module;
The second noise jamming measurement module, be used for when the transmitting power of the transmitting power of business datum signal and pilot signal is inconsistent, the power of the business datum signal that adjustment receives and the power of pilot signal, therefrom remove the inconsistent impact of transmitting power, then calculate the average power of the business datum signal that receives and the average power of the pilot signal that receives, and according between the two difference, obtain performance number P
I, with P
ISend summation module;
Summation module is used for P
NAnd P
IAddition obtains the final suffered noise-plus-interference power of business datum signal.
7. device according to claim 6 is characterized in that,
Described the second noise jamming measurement module, be used for according to the multiple relation between the transmitting power of the transmitting power of business datum signal and pilot signal, the power of the power of the business datum signal that receives and pilot signal is carried out convergent-divergent process, therefrom to remove the inconsistent impact of transmitting power.
8. device according to claim 6 is characterized in that,
Described the second noise jamming measurement module when being used for difference between the average power of the average power that receives the business datum signal and the pilot signal that receives and surpassing the threshold value of presetting, makes P
IEqual this difference; Otherwise make P
IEqual 0.
9. each described device in 8 according to claim 6 is characterized in that,
Described the second noise jamming measurement module, the average power of the business datum signal that is used for utilizing corresponding time domain and/or frequency domain resource to calculate and receives and the average power of the pilot signal that receives.
10. device according to claim 9 is characterized in that,
Described the second noise jamming measurement module is used for calculating the average power of all data resource elements of first symbol of descending sub frame, as the average power of the business datum signal that receives when calculating the noise jamming of LTE system down link.
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| CN102892138B (en) * | 2011-07-19 | 2017-05-10 | 中兴通讯股份有限公司 | Signal-to-noise ratio measuring method and device for PUCCH (Physical Uplink Control Channel) |
| CN103167549A (en) * | 2011-12-19 | 2013-06-19 | 中兴通讯股份有限公司 | Measuring reference signal processing method and device |
| DK3554121T3 (en) | 2013-09-30 | 2020-12-07 | Ericsson Telefon Ab L M | Configuration of mobility management measurement method |
| US9729221B2 (en) * | 2015-06-26 | 2017-08-08 | Intel IP Corporation | Method for feedback reporting and a mobile communications device |
| CN105071876B (en) * | 2015-08-26 | 2017-11-24 | 华为技术有限公司 | Interference estimation method and device |
| CN110996332A (en) * | 2019-12-25 | 2020-04-10 | 公安部第一研究所 | Coverage self-adaptive adjusting method based on interference |
| CN114928853B (en) * | 2022-06-06 | 2024-05-10 | 中国联合网络通信集团有限公司 | Network optimization method and device, electronic equipment and storage medium |
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| WO2002100033A1 (en) * | 2001-06-04 | 2002-12-12 | Qualcomm Incorporated | Method and apparatus for estimating the signal to interference ratio of a wireless channel |
| CN101335980A (en) * | 2007-06-28 | 2008-12-31 | 华为技术有限公司 | Carrier interference noise ratio measurement method and communication apparatus |
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| WO2002100033A1 (en) * | 2001-06-04 | 2002-12-12 | Qualcomm Incorporated | Method and apparatus for estimating the signal to interference ratio of a wireless channel |
| CN101335980A (en) * | 2007-06-28 | 2008-12-31 | 华为技术有限公司 | Carrier interference noise ratio measurement method and communication apparatus |
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Effective date of registration: 20170830 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 Post Communication Equipment Co., Ltd. |