CN104348564A - Method for determining reference signal received power (RSRP) - Google Patents
Method for determining reference signal received power (RSRP) Download PDFInfo
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- CN104348564A CN104348564A CN201310338458.3A CN201310338458A CN104348564A CN 104348564 A CN104348564 A CN 104348564A CN 201310338458 A CN201310338458 A CN 201310338458A CN 104348564 A CN104348564 A CN 104348564A
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Abstract
一种确定参考信号接收功率的方法，所述方法包括：在UE接收到的同步信号中确定当前最大相关峰对应邻小区的干扰信号的信道估计；由所述邻小区的干扰信号的信道估计获得所述邻小区的干扰信号的估值；在UE接收到的同步信号中剔除所述邻小区的干扰信号的估值，将UE接收到的同步信号更新为剔除所述邻小区的干扰信号的估值后的同步信号；根据所述邻小区的干扰信号的信道估计计算所述邻小区的RSRP；重新确定当前最大相关峰对应的邻小区的干扰信号的信道估计。应用本发明实施例后，用于测量RSRP的资源增加，进而可以在短时间内得到多个RSRP，从而提高RSRP的报告精度。
A method for determining the received power of a reference signal, the method comprising: determining the channel estimation of the interference signal of the adjacent cell corresponding to the current maximum correlation peak in the synchronization signal received by the UE; obtaining from the channel estimation of the interference signal of the adjacent cell Estimation of the interference signal of the neighboring cell; removing the estimation of the interference signal of the neighboring cell from the synchronization signal received by the UE, and updating the synchronization signal received by the UE to the estimation of the interference signal of the neighboring cell Calculate the RSRP of the adjacent cell according to the channel estimation of the interference signal of the adjacent cell; re-determine the channel estimation of the interference signal of the adjacent cell corresponding to the current maximum correlation peak. After the embodiment of the present invention is applied, resources for measuring RSRP are increased, and multiple RSRPs can be obtained in a short time, thereby improving the reporting accuracy of RSRP.
Description
Technical field
The application relates to communication technical field, more specifically, relates to a kind of method determining Reference Signal Received Power.
Background technology
LTE230 system works in 230,000,000 frequency ranges, towards the wireless network that power system of data acquisition, distribution control, video communication etc. are applied.LTE230 system comprises service terminal, Access Network, core net, main website and operation maintenance center etc.
LTE230 system signal frequency spectrum is the discrete frequency being distributed in 230 frequency ranges, frequency interval 25kHz.On each frequency, the modulation system of signal is OFDM (OFDM).Each frequency has 10 effective subcarriers.LTE230 is TDD system, and a frame of signal is made up of up, descending and a special time slot.Every frame length is 25ms, has 5 subframes, wherein uply takies 3 subframes, and descending 1 subframe, special time slot takies a frame.Each community of LTE230 system has 3 synchronous frequencies, and Cell Broadcast CB and synchronizing signal are submitted for sending every frame at synchronous frequency.
The user (UE) of LTE230 system needs the RSRP measuring adjacent cell.RSRP measurement is that the pilot signal on the broadcast frame on synchronous frequency is carried out.
Pilot signal on broadcast frame only has 13, limited amount.When signal is more weak, such as, at cell edge, the certainty of measurement of RSRP is deteriorated, and in order to ensure the certainty of measurement of RSRP, physical layer needs the measurement utilizing multiple RSRP to carry out filtering.In order to improve the certainty of measurement of RSRP, physical layer needs the measurement utilizing multiple RSRP to carry out filtering.Not only just add the time interval of measurement report, also have restriction to the translational speed of UE.
Summary of the invention
The embodiment of the present invention proposes a kind of method determining Reference Signal Received Power, increases, and then can obtain multiple RSRP at short notice, thus improve the certainty of measurement of RSRP for the resource measuring RSRP.
The technical scheme of the embodiment of the present invention is as follows:
Determine a method for Reference Signal Received Power, described method comprises:
The channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak is determined in the synchronizing signal that user UE receives;
The valuation of the interference signal of described adjacent cell is obtained by the channel estimating of the interference signal of described adjacent cell;
In the synchronizing signal that UE receives, reject the valuation of the interference signal of described adjacent cell, the synchronizing signal received by UE is updated to the synchronizing signal after the valuation of the interference signal rejecting described adjacent cell;
The Reference Signal Received Power RSRP of adjacent cell according to the channel estimation calculation of the interference signal of described adjacent cell;
Redefine the channel estimating of the interference signal of adjacent cell corresponding to current maximum correlation peak.
Determine in the described synchronizing signal received at UE that the channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak comprises:
The label ID of this community and adjacent cell ID is utilized to produce the synchronous code of this community;
The synchronizing signal that the synchronous code of this community and UE receive carries out related operation, determines the synchronous code of the interference signal of the corresponding adjacent cell of current maximum correlation peak;
The channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak is determined by the synchronous code of the interference signal of the synchronous code of this community, the corresponding adjacent cell of current maximum correlation peak.
The valuation that the described channel estimating by the interference signal of described adjacent cell obtains the interference signal of described adjacent cell comprises:
The product of the synchronous code of the channel estimating of the interference signal of described adjacent cell and the interference signal of described adjacent cell equals the valuation of the interference signal of described adjacent cell.
The valuation of rejecting the interference signal of described adjacent cell in the described synchronizing signal received at UE comprises: UE deducts the valuation of the interference signal of described adjacent cell in the synchronizing signal received.
Described in the channel estimation calculation of the described interference signal according to described adjacent cell, the RSRP of adjacent cell comprises:
The RSRP=E(||H||2 of described adjacent cell)-G, H be the channel estimating of the interference signal of described adjacent cell, E(x) be the expectation of x, G is receiver gain.
As can be seen from technique scheme, in the synchronizing signal received at UE in embodiments of the present invention, determine the channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak; The valuation of the interference signal of described adjacent cell is obtained by the channel estimating of the interference signal of described adjacent cell; In the synchronizing signal that UE receives, reject the valuation of the interference signal of described adjacent cell, the synchronizing signal received by UE is updated to the synchronizing signal after the valuation of the interference signal rejecting described adjacent cell; The RSRP of adjacent cell according to the channel estimation calculation of the interference signal of described adjacent cell; Redefine the channel estimating of the interference signal of adjacent cell corresponding to current maximum correlation peak.Because synchronizing signal is as the resource measuring RSRP, increases for the resource measuring RSRP, and then multiple RSRP can be obtained at short notice, thus improve the certainty of measurement of RSRP.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram determining Reference Signal Received Power.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention, in the synchronizing signal that UE receives, by rejecting the interference signal of adjacent cell corresponding to current maximum correlation peak, step by step calculation goes out the RSRP of each adjacent cell.Due to much 144 of the synchronizing signal in synchronization frame, be far longer than the number of 13 pilot signals in broadcast frame, the resource therefore for measuring RSRP increases, and then can obtain multiple RSRP at short notice, thus improves the certainty of measurement of RSRP.
Be the method flow schematic diagram determining Reference Signal Received Power see accompanying drawing 1, specifically comprise the following steps:
101, the channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak is determined in the synchronizing signal received at UE.
The synchronizing signal that UE receives at l subcarrier to kth carrier wave is:
Wherein N
syncit is the number of the synchronizing signal received; S
i(l, k) is synchronizing signal, S
0(l, k) is this cell synchronous signal, and other is adjacent cell synchronizing signal; H
i(l, k) is the channel of i-th synchronizing signal; N (l, k) is noise.
A () utilizes known this community ID and No. ID, adjacent cell to produce the synchronous code of this community
B () uses synchronous code
with the signal Y(l, the k that receive) carry out related operation, find the synchronous code of the interference signal producing the corresponding adjacent cell of current maximum correlation peak
C () is by the synchronous code of this community
the synchronous code of the interference signal of the corresponding adjacent cell of current maximum correlation peak
determine the channel H of the interference signal of the corresponding adjacent cell of current maximum correlation peak
m0(l, k) channel estimating
102, the valuation of the interference signal of described adjacent cell is obtained by the channel estimating of the interference signal of adjacent cell.
The product of the synchronous code of the channel estimating of the interference signal of adjacent cell and the interference signal of adjacent cell equals the valuation of the interference signal of adjacent cell.The i.e. valuation of the interference signal of adjacent cell
103, reject the valuation of the interference signal of adjacent cell in the synchronizing signal received at UE, the synchronizing signal received by UE is updated to the synchronizing signal after the valuation of the interference signal rejecting adjacent cell.
In LTE230 system, each synchronization frame takies 144 synchronizing signals, and 144 synchronizing signals namely can be utilized in the present invention to measure RSRP.Synchronizing signal received by UE not only comprises the signal of this community, also comprises the signal of neighbor cell.First find the synchronous code producing current maximum correlation peak, in the synchronizing signal received by UE, reject the interference signal of adjacent cell corresponding to maximum correlation peak.And then the interference signal of the adjacent cell finding current maximum correlation peak corresponding, again reject this interference signal.Like this, reject the interference signal of adjacent cell successively according to maximum correlation peak, so when there is no relevant peaks, then illustrate and all reject synchronizing signal in the synchronizing signal received by UE.
In the process of interference signal rejecting adjacent cell, the channel estimating of the interference signal of adjacent cell can be determined, the channel estimation calculation RSRP of the interference signal of adjacent cell can be utilized.
The interference signal of adjacent cell and UE deduct the interference signal of described adjacent cell valuation in the synchronizing signal received is rejected in the synchronizing signal that UE receives.
The synchronizing signal received due to UE comprises the interference signal of all adjacent cells, in order to reject the interference signal of adjacent cell in the synchronizing signal that receives at UE successively, the synchronizing signal after needing the synchronizing signal received at UE to be updated to the interference signal rejecting adjacent cell.The synchronizing signal received by UE is updated to the synchronizing signal Y after the interference signal rejecting adjacent cell
1(l, k).
104, according to the RSRP of the channel estimation calculation adjacent cell of the interference signal of adjacent cell.
According to prior art, the RSRP=E(||H|| of adjacent cell
2)-G, H be the channel estimating of the interference signal of adjacent cell, E(x) expectation of x, G is receiver gain.
The synchronizing signal received due to UE comprises the interference signal of all adjacent cells, so utilizes the channel estimating of the interference signal of adjacent cell just can calculate the RSRP of this adjacent cell.Therefore thus improve the certainty of measurement of RSRP because synchronization frame takies 144 symbols i.e. 144 synchronizing signals, compared with prior art more RSRP can obviously be obtained.
105, the channel estimating of the interference signal of adjacent cell corresponding to current maximum correlation peak is redefined.
In the synchronizing signal that UE receives, not only comprise the signal of this community, also comprise the interference signal of adjacent cell.After rejecting the interference signal of adjacent cell corresponding to current maximum correlation peak, if there is maximum correlation peak in the synchronizing signal after the interference signal rejecting adjacent cell, then need still there is interference signal in the synchronizing signal illustrating that UE receives.Can determine that this interference signal is the interference signal of adjacent cell according to the ID of community, or the interference signal of this community.Therefore, the channel estimating of the interference signal again obtaining adjacent cell corresponding to current maximum correlation peak is needed.Namely perform step 101, when without maximum correlation peak, then illustrate in the synchronizing signal that UE receives there is no interference signal.
Below in conjunction with specific embodiment, describe technical scheme of the present invention in detail.
(A) known this community ID and No. ID, adjacent cell is utilized to produce the synchronous code of community
(B) synchronous code is used
(l, k) and the signal Y(l, the k that receive) carry out related operation, find the synchronous code of the interference signal producing the corresponding adjacent cell of current maximum correlation peak
(C) by the synchronous code of this community
the synchronous code of the interference signal of the corresponding adjacent cell of current maximum correlation peak
determine the channel H of the interference signal of the corresponding adjacent cell of current maximum correlation peak
m0(l, k) channel estimating
m0 represents current maximum correlation peak.
(D) calculate
namely the valuation of the interference signal of described adjacent cell is rejected in the synchronizing signal received at UE.The synchronizing signal received by UE is updated to the synchronizing signal after the valuation of the interference signal rejecting adjacent cell, and the synchronizing signal that namely now UE receives equals Y
1(l, k).
(E) owing to rejecting the interference signal of adjacent cell corresponding to current maximum correlation peak, therefore utilize and remove
outside synchronous code and Y
1(l, k) is correlated with, and obtains the synchronous code of the interference signal of the corresponding adjacent cell of current maximum correlation peak
By the synchronous code of the interference signal of the synchronous code of this community, the corresponding adjacent cell of current maximum correlation peak
determine the channel H of the interference signal of the corresponding adjacent cell of current maximum correlation peak
m1the channel estimating of (l, k)
(F) calculate
again reject the valuation of the interference signal of adjacent cell.The synchronizing signal that now UE receives equals Y
2(l, k).
Repeat (D) to (F) to calculate
The RSRP of neighbor cell mj
mjcan be obtained by following formula:
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. determine a method for Reference Signal Received Power, it is characterized in that, described method comprises:
The channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak is determined in the synchronizing signal that user UE receives;
The valuation of the interference signal of described adjacent cell is obtained by the channel estimating of the interference signal of described adjacent cell;
In the synchronizing signal that UE receives, reject the valuation of the interference signal of described adjacent cell, the synchronizing signal received by UE is updated to the synchronizing signal after the valuation of the interference signal rejecting described adjacent cell;
The Reference Signal Received Power RSRP of adjacent cell according to the channel estimation calculation of the interference signal of described adjacent cell;
Redefine the channel estimating of the interference signal of adjacent cell corresponding to current maximum correlation peak.
2. determine the method for Reference Signal Received Power according to claim 1, it is characterized in that, in the described synchronizing signal received at UE, determine that the channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak comprises:
The label ID of this community and adjacent cell ID is utilized to produce the synchronous code of this community;
The synchronizing signal that the synchronous code of this community and UE receive carries out related operation, determines the synchronous code of the interference signal of the corresponding adjacent cell of current maximum correlation peak;
The channel estimating of the interference signal of the corresponding adjacent cell of current maximum correlation peak is determined by the synchronous code of the interference signal of the synchronous code of this community, the corresponding adjacent cell of current maximum correlation peak.
3. determine the method for Reference Signal Received Power according to claim 2, it is characterized in that, the valuation that the described channel estimating by the interference signal of described adjacent cell obtains the interference signal of described adjacent cell comprises:
The product of the synchronous code of the channel estimating of the interference signal of described adjacent cell and the interference signal of described adjacent cell equals the valuation of the interference signal of described adjacent cell.
4. determine the method for Reference Signal Received Power according to claim 1, it is characterized in that, the valuation of rejecting the interference signal of described adjacent cell in the described synchronizing signal received at UE comprises: UE deducts the valuation of the interference signal of described adjacent cell in the synchronizing signal received.
5. determine the method for Reference Signal Received Power according to claim 1, it is characterized in that, described in the channel estimation calculation of the described interference signal according to described adjacent cell, the RSRP of adjacent cell comprises:
The RSRP=E(||H|| of described adjacent cell
2)-G, H be the channel estimating of the interference signal of described adjacent cell, E(x) be the expectation of x, G is receiver gain.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108023701A (en) * | 2016-11-04 | 2018-05-11 | 华为技术有限公司 | A kind of information transferring method, device and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1672340A (en) * | 2002-07-30 | 2005-09-21 | 美商内数位科技公司 | Power measurement of received CDMA signals using soft threshold preprocessing after correlation |
| CN102892139A (en) * | 2011-07-21 | 2013-01-23 | 普天信息技术研究院有限公司 | Method for measuring neighbourhood of multi-channel wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1672340A (en) * | 2002-07-30 | 2005-09-21 | 美商内数位科技公司 | Power measurement of received CDMA signals using soft threshold preprocessing after correlation |
| CN102892139A (en) * | 2011-07-21 | 2013-01-23 | 普天信息技术研究院有限公司 | Method for measuring neighbourhood of multi-channel wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023701A (en) * | 2016-11-04 | 2018-05-11 | 华为技术有限公司 | A kind of information transferring method, device and system |
| CN108023701B (en) * | 2016-11-04 | 2021-07-20 | 华为技术有限公司 | An information transmission method, device and system |
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