CN103929772A - Reference signal receiving power measuring method and device, reselection method and user terminal - Google Patents
Reference signal receiving power measuring method and device, reselection method and user terminal Download PDFInfo
- Publication number
- CN103929772A CN103929772A CN201310015137.XA CN201310015137A CN103929772A CN 103929772 A CN103929772 A CN 103929772A CN 201310015137 A CN201310015137 A CN 201310015137A CN 103929772 A CN103929772 A CN 103929772A
- Authority
- CN
- China
- Prior art keywords
- reference signal
- unit
- receiving power
- power
- signal receiving
- 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
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005259 measurement Methods 0.000 claims description 35
- 238000000691 measurement method Methods 0.000 claims description 23
- 230000002452 interceptive effect Effects 0.000 claims description 15
- 238000012937 correction Methods 0.000 claims description 10
- 238000012935 Averaging Methods 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 39
- 238000010586 diagram Methods 0.000 description 9
- 230000002596 correlated effect Effects 0.000 description 4
- 230000006854 communication Effects 0.000 description 3
- 239000013598 vector Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a reference signal receiving power measuring method and device, a reselection method and a user experience. The measuring method comprises finding reference signals and corresponding reference signal symbols from received signals; obtaining frequency domain signals corresponding to the reference signal symbols from the signals; obtaining channels of the reference signals corresponding to the reference signal symbols based on the domain signals; forming correlation factors by combining with the relevance of the reference signals corresponding to the reference signal symbols identical in sub-carrier positions according to the channels; obtaining reference signal receiving power based on the correlation factors. The reselection method comprises the measuring method. The user experience comprises the measuring device. By means of the measuring method and device, the reselection method and the user experience, the reference signal receiving power (RSRP) measuring accuracy is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for measuring reference signal received power, a method for reselecting, and a user side.
Background
In a Long Term Evolution (LTE) mobile communication system, cell reselection is one of the most important tasks in idle mode. Through cell reselection, a User Equipment (UE) may camp in a cell with good quality.
Specifically, after the UE camps on a certain cell of the LTE system, the signal quality of the current cell and the signal quality of neighboring cells are continuously measured, and when the signal quality of other cells is found to meet a specified requirement, the UE reselects from the current cell to a cell with better quality through cell reselection. Note that, in the LTE system, the measurement is performed by measuring Reference Signal Received Power (RSRP).
An RSRP measurement method is disclosed in chinese patent application with publication number CN102457469A, and referring to fig. 1, a schematic diagram of the RSRP measurement method in the chinese patent is shown. The method comprises the following steps: frequency shifting the received signal so that the upper half band or the lower half band becomes centered at the DC frequency; decimating the received signal to a width of n · 2m samples, n being a reference symbol spaced in the received signal; dividing a sample into n sample vectors, each sample vector having a length of 2m, and superposing the n sample vectors; and performing an FFT operation on the superimposed signals to obtain a continuum of reference symbol carriers from a signal transmitted by a base station, the reference symbol carriers being adapted to determine the reference signal received power of the signal transmitted by the base station. The RSRP measurement method disclosed in the chinese patent application is relatively simple.
However, the accuracy of RSRP measurements is very important for cell reselection. The user experience is affected because the UE cannot camp in the cell with the best signal quality if the RSRP measurement is not accurate enough. How to improve the accuracy of RSRP measurement is one of the technical problems that those skilled in the art are urgently required to solve.
Disclosure of Invention
The invention aims to provide a reference signal received power measurement method and device, a reselection method and a user side, which can improve RSRP measurement accuracy.
In order to solve the above problem, the present invention provides a method for measuring reference signal received power, comprising: finding out a reference signal and a corresponding reference signal symbol from the received signal; obtaining a frequency domain signal corresponding to the reference signal symbol from the signal; obtaining a channel of a reference signal corresponding to the reference signal symbol based on the frequency domain signal; according to the channel, forming a correlation factor by combining the correlation of the reference signals corresponding to the reference signal symbols with the same subcarrier positions; and obtaining the reference signal received power based on the correlation factor.
Optionally, the method further comprises: according to the channel, forming an uncorrelated factor by combining the irrelevance between the reference signal corresponding to the reference signal symbol with the same subcarrier position and the interference signal; and obtaining the interference signal receiving power based on the uncorrelated factor.
Optionally, the method further comprises: and correcting the reference signal received power by combining the relation between the reference signal received power and the interference signal received power to obtain the corrected reference signal received power.
Optionally, the step of obtaining the corrected reference signal received power includes: comparing the relative magnitude of the interference signal received power and the reference signal received power; and when the interference signal receiving power is smaller than the reference signal receiving power of a first preset multiple, correcting the reference signal receiving power to obtain the corrected reference signal receiving power.
Optionally, the step of correcting the reference signal received power to obtain a corrected reference signal received power includes: if the interference signal received power is greater than the reference signal received power of a second preset multiple and less than the reference signal received power of a first preset multiple, the corrected reference signal power is the difference between the reference signal received power and one sixteenth interference signal received power;
if the interference signal received power is greater than the reference signal received power and less than a second preset multiple of the reference signal received power, the corrected reference signal power is the difference between the reference signal received power and one eighth of the interference signal received power; and if the interference signal receiving power is smaller than the reference signal receiving power, the corrected reference signal power is the difference between the reference signal receiving power and one fourth of the interference signal receiving power.
Optionally, the step of obtaining a channel corresponding to a reference signal symbol based on the frequency domain signal includes: and obtaining the channel based on the conjugate multiplication of the frequency domain signal and the reference signal.
Optionally, according to the channel, the step of forming the correlation factor in combination with the reference signal correlation of the reference signal symbols with the same subcarrier position includes: and carrying out conjugate multiplication on channels of the reference signal symbols with the same subcarrier positions, and taking the absolute value of the conjugate multiplication real part as a correlation factor.
Optionally, according to the channel, in combination with the independence between the reference signal and the interference signal of the reference signal symbol with the same subcarrier position, the step of forming the uncorrelated factor includes: and carrying out conjugate multiplication on channels of the reference signal symbols with the same subcarrier positions, and taking the absolute value of the imaginary part of the conjugate multiplication as an uncorrelated factor.
Optionally, the step of obtaining the reference signal received power based on the correlation factor includes: the reference signal received power is obtained by averaging the sum of the correlation factors.
Accordingly, the present invention provides a method of reselection, comprising: measuring the reference signal received power of the current cell and the adjacent cell, wherein the reference signal received power is measured by the reference signal received power measuring method; and when the measured reference signal received power of the adjacent cell is greater than that of the current cell, switching to the adjacent cell for residing.
Correspondingly, the invention also provides a reference signal received power measuring device, comprising: a reference signal unit adapted to find a reference signal and a corresponding reference signal symbol; the frequency domain signal unit is connected with the reference signal unit and is suitable for obtaining a frequency domain signal corresponding to the reference signal symbol found by the reference signal unit; the channel unit is connected with the frequency domain signal unit and the reference signal unit and is suitable for obtaining a channel of a reference signal corresponding to the reference signal symbol based on the frequency domain signal obtained by the frequency domain signal unit; the correlation factor unit is connected with the channel unit and the reference signal unit and is suitable for forming a correlation factor according to the channel obtained by the channel unit and by combining the correlation between the reference signals corresponding to the reference signal symbols with the same subcarrier positions found by the reference signal unit; and the reference signal receiving power unit is connected with the correlation factor unit and is suitable for obtaining the reference signal receiving power based on the correlation factor formed by the correlation factor unit.
Optionally, the method further comprises: the uncorrelated factor unit is connected with the channel unit and the reference signal unit and is suitable for forming uncorrelated factors according to the channel obtained by the channel unit and by combining the irrelevance between reference signals corresponding to reference signal symbols with the same subcarrier positions found by the reference signal unit and interference signals; and the interference signal receiving power unit is connected with the uncorrelated factor unit and is suitable for obtaining the interference signal receiving power based on the uncorrelated factor.
Optionally, the method further comprises: and the correction unit is connected with the reference signal receiving power unit and the interference signal receiving power unit and is suitable for correcting the reference signal receiving power by combining the relative relation between the reference signal receiving power obtained by the reference signal receiving power unit and the interference signal receiving power obtained by the interference signal receiving power unit so as to obtain the corrected reference signal receiving power.
Optionally, the correction unit comprises: the comparator is connected with the reference signal receiving power unit and the interference signal receiving power unit and is suitable for comparing the relative magnitude of the interference signal receiving power and the reference signal receiving power and forming a trigger signal when the interference signal receiving power is smaller than the reference signal receiving power of a first preset multiple; and the corrector is connected with the reference signal receiving power unit and the comparator and is suitable for correcting the reference signal receiving power when receiving the trigger signal sent by the corrector so as to obtain the corrected reference signal receiving power.
Optionally, the corrector is further connected to the interference signal receiving power unit; the comparator is suitable for sending a first trigger signal when the interference signal receiving power is larger than the reference signal receiving power of a second preset multiple and smaller than the reference signal receiving power of a first preset multiple; the corrector is suitable for obtaining the corrected reference signal power according to the difference between the reference signal receiving power and one sixteenth interference signal receiving power when the first trigger signal is received; the comparator is suitable for sending a second trigger signal when the interference signal receiving power is larger than the reference signal receiving power and smaller than a second preset multiple of the reference signal receiving power; the corrector is suitable for obtaining the corrected reference signal power according to the difference between the reference signal receiving power and one eighth of the interference signal receiving power when the second trigger signal is received; the comparator is suitable for sending out a third trigger signal when the interference signal receiving power is smaller than the reference signal receiving power; the corrector is suitable for obtaining the corrected reference signal power according to the difference between the reference signal receiving power and one fourth of the interference signal receiving power when the third trigger signal is received.
Optionally, the channel unit is adapted to obtain the channel according to a modulus of a conjugate multiplication of the frequency domain signal obtained by the frequency domain signal unit and the reference signal found by the reference signal unit.
Optionally, the correlation factor unit is adapted to perform conjugate multiplication on channels of reference signal symbols with the same subcarrier position obtained by the channel unit, and an absolute value of a real part of the conjugate multiplication is used as the correlation factor.
Optionally, the uncorrelated factor unit is adapted to perform conjugate multiplication on channels of reference signal symbols with the same subcarrier position obtained by the channel unit, and an absolute value of an imaginary part of the conjugate multiplication is used as the uncorrelated factor.
Optionally, the reference signal received power unit is adapted to obtain the reference signal received power according to an average of sums of correlation factors formed by the correlation factor unit.
Optionally, a user terminal, comprising: the reference signal power measuring device.
Optionally, the user side is a mobile phone, and the measuring device is disposed in the mobile phone.
Compared with the prior art, the technical scheme of the invention has the following advantages:
since the reference signals are not correlated with the interference signals, but correlated with each other, even if there is an interference signal on the column corresponding to the reference signal symbol, when the correlation factor is formed according to the channel in combination with the correlation of the reference signals corresponding to the reference signal symbols with the same subcarrier position, the part corresponding to the reference signal is extracted, so that the influence of the interference signal is reduced, and the accuracy of RSRP measurement is improved.
Drawings
FIG. 1 is a flow diagram of a prior art RSRP;
FIG. 2 is a two-port reference signal resource map;
fig. 3 is a schematic flow chart of a first embodiment of the RSRP measurement method of the present invention;
fig. 4 is a flow chart illustrating a second embodiment of the RSRP measurement method of the present invention;
FIG. 5 is a flowchart illustrating an embodiment of step S8 shown in FIG. 4;
FIG. 6 is a flowchart illustrating an embodiment of step S82 shown in FIG. 5;
fig. 7 is a schematic diagram of a first embodiment of an RSRP measurement device of the present invention;
fig. 8 is a schematic diagram of a second embodiment of the RSRP measuring device of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.
In order to solve the problems in the prior art, the inventors of the present invention have conducted extensive studies on a reference signal received power measurement method. Referring to fig. 2, a two-port reference signal resource map is shown. Here, it should be noted that, the cell has two antenna ports (port 0 and port 1) as an example for description, but this should not be taken as a limitation, and may also be a cell with one antenna port or four antenna ports, and the RSRP calculation method performed by cells with different numbers of antenna ports may be modified, and replaced accordingly.
In fig. 2, each small square represents a Resource Element (RE), and the horizontal direction in port 0 and port 1 is time, and the vertical direction is frequency. R0First reference signal S1, R issued for port 01Second issued for port 1Reference signal S2, to prevent confusion of reference signals from different ports of the same cell, the non-transmitting signal S0 is set in port 1 at the position where the first reference signal S1 is issued from port 0, and similarly, the non-transmitting signal S0 is set in port 0 at the position where the second reference signal S2 is issued from port 1.
In the reference signal sent from port 0 or port 1, one Resource Block (RB, which is usually a reference signal including 6 RBs in the LTE system, and is exemplified by RB0 in fig. 2) has 12 subcarriers in the frequency domain, 14 symbols in the time domain, and the reference signal (R) is sent from port 0 or port 1 (R is a reference signal in the LTE system)0Or R1) The positions are different by 6 subcarriers in the frequency domain and by 4 symbols in the time domain. Specifically, a total of 4 reference signal symbols are suitable for measurement, and four symbols may be labeled as 0, 1 for convenience of description. 2,3.
Specifically, the RSRP test is a linear average power of a reference signal within a certain frequency band (i.e., several resource blocks). Accordingly, RSRP may be expressed as the following equation:
Wherein Hi(k, l) is the channel estimated at (k, l) for the reference signal at antenna port 0 for the ith receiving antenna, HiThe power of the reference signal is the square of the modulus of (k, l), and (k, l) represents the Resource Element (RE) corresponding to the l-th symbol and the k-th subcarrier, and N, L represents the number of Resource blocks and the number of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, respectively.
Taking port 0 as an example, formula (1) represents R of all positions in bitmap 20The average of the power sums of the corresponding channels.
However, the inventor finds that when the signal-to-noise ratio is low or the co-channel interference is large, the RSRP measurement error is large by using the method of the formula (1). This is because the UE receives the same frequency signal from interfering cells with different Cell IDs, while receiving the reference signal from the target Cell to be measured. The reference signals of the interfering Cell and the target Cell having different Cell IDs are located at different positions in the map, and therefore, an interference signal generated by the reference signal transmitted from the interfering Cell appears at a position such as F (ideally, there is no reference signal at the position) in fig. 2. When the RSRP is calculated by using the formula (1), the interference signals are also superimposed to generate interference to the RSRP measured by the UE. Therefore, in order to improve the measurement accuracy of RSRP, in addition to white noise removal, it is necessary to estimate an error due to an interfering cell so as to remove the estimated error.
However, the inventors found that the amount of calculation is very large if the interfering cell power is calculated by a method similar to equation (1).
In order to solve the above problems, the inventor provides a reference signal received power measurement method based on the characteristic that the reference signal in the LTE system is a pseudorandom signal. Referring to fig. 3, a flow chart of a first embodiment of the reference signal received power measurement method of the present invention is shown. The measuring method generally comprises the steps of:
step S1 is executed to find out the reference signal and the corresponding reference signal symbol from the received signal.
Specifically, after the UE camps on a cell of the LTE system (i.e., the current cell where the UE is located), a signal transmitted to the UE from a neighboring cell (i.e., a target cell) of the current cell is received. After receiving the signal, the UE analyzes and extracts the signal, finds out a reference signal included in the signal, performs RSRP measurement, and further determines whether the signal quality of the target cell meets the requirement of cell reselection.
Continuing with fig. 2, a map of a template of a reference signal is illustrated. The neighboring cells are exemplified as two antennas, but the present invention is not limited thereto.
As shown in fig. 2, in the LTE system, reference signals (S1 or S2) differ by 4 reference signal symbols in the time domain. In particular, the reference signals are located on 4 different columns in the template, i.e. a total of 4 reference signal symbols are suitable for measurement, four symbols may be labeled 0, 1, 2, 3 for convenience of description. After the UE finds the reference signal from the received signal, it needs to process the reference signal to extract a reference signal symbol.
It should be noted that, the method for finding a reference signal from a signal and finding a reference symbol from the reference signal are the same as those in the prior art, and are not described herein again.
Step S2 is executed to obtain a frequency domain signal corresponding to the reference signal symbol from the signal. As shown in fig. 2, in the LTE system, reference symbols are different by 6 subcarriers in the frequency domain direction. After the UE obtains the reference signal symbol in the time domain direction, the UE obtains a frequency domain signal corresponding to the reference signal symbol in YiAnd (k, l) represents a frequency domain signal corresponding to the i-th symbol in the time domain and the k-th subcarrier in the frequency domain transmitted by the i-th (i is 0 or 1) antenna when the UE receives the symbol.
It should be noted that the frequency domain signal YiIn addition to receiving the reference signal sent by the antenna, the (k, l) also includes a white noise signal and an interference signal generated by the co-frequency cell.
Thus, without loss of generality, the i receive antenna receive signal can be expressed as follows:
k =1, … …, 2N; l =1, … …, L formula (2)
Wherein Hi 0(k，l)、Si 0(k, l) are the channel estimated by the UE and the reference signal, respectively. Likewise, Hi n(k，l)、Si n(k, l) are interfering cells N =1, … …, N, respectivelycellChannel at corresponding position of RE (k, l) and reference signal, where NcellIs the number of interfering cells. Said N isi(k, l) is white noise.
Step S3 is executed to obtain a channel of the reference signal corresponding to the reference signal symbol based on the frequency domain signal.
As can be seen from equation (2), the reference signal S is transmitted from an interfering Cell having a different Cell ID from the target Celli n(k, l) and Si 0(k, l) are different signals, which are uncorrelated, but are general data signals. That is, the reference signal S actually sent by the interfering cell for the target celli n(k, l) is similar to white noise. Thus, the frequency domain symbol may also be expressed as:
Wherein,equivalent to a combination of white noise and the reference signal of the interfering cell.
In the actual communication process, the UE receives the frequency domain signal YiAfter (k, l), in conjunction with equation (3), the channel can be obtained by the following relation:
That is, it may be based on the frequency domain signal Yi(k, l) and the reference signal Si 0And (k, l) conjugate multiplication to obtain the channel.
Wherein, <math>
<mrow>
<mover>
<msubsup>
<mi>N</mi>
<mn>1</mn>
<mi>eff</mi>
</msubsup>
<mo>‾</mo>
</mover>
<mrow>
<mo>(</mo>
<mi>k</mi>
<mo>,</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<msub>
<mover>
<mi>N</mi>
<mo>‾</mo>
</mover>
<mi>i</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>k</mi>
<mo>,</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<msubsup>
<mi>S</mi>
<mi>i</mi>
<mn>0</mn>
</msubsup>
<mrow>
<mo>(</mo>
<mi>k</mi>
<mo>,</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mo>*</mo>
<mo>,</mo>
</mrow>
</math> in the general case of the above-mentioned, thus, equation (4) can be expressed as:
That is, the channel estimated by the UE includes the channel corresponding to the reference signalAnd noiseWherein the noise comprises white noise and an interference signal emitted by an interfering cell.
Step S4 is executed to combine the correlations of the reference signals corresponding to the reference signal symbols with the same subcarrier position to form a correlation factor according to the channel.
However, the channel obtained in step S3 still contains the influence of white noise and interference signals. In order to realize RSRP measurement more accurately, the invention needs to use H in formula (5)i 0(k, l), then calculating the average value of the power sum of the channels corresponding to all the reference signal positions sent by different antennas through formula (1). And further measurement of RSRP is realized.
The inventors have found that, first, a reference signal S emitted from an interfering Cell having a different Cell ID from a target Celli n(k, l) and Si 0(k, l) are different signals, which have no correlation. The reference signals sent by the target cell are the same signals, and the reference signals have strong correlation. Therefore, the reference signal of the target cell can be extracted by combining the correlation based on formula (4) through the characteristic of the correlation of the reference signal to obtain RSRP.
Next, please refer to fig. 2, taking port 0 as an example for explanation, where the positions of the subcarriers in which the reference signals of reference signal symbol 0 and reference signal symbol 2 sent by port 0 are located are the same, and the positions of the subcarriers in which the reference signals of reference signal symbol 1 and reference signal symbol 3 are located are the same. That is, the reference signals corresponding to reference signal symbol 0 and reference signal symbol 2 have strong correlation, and the correlation factor between the two isThe correlation between the reference signals corresponding to reference signal symbol 1 and reference signal symbol 3 is strong, and the correlation factor between the two is
I.e. the absolute value of the real part of the conjugate multiplication can be used as the correlation factor by conjugate multiplication of the channels of the reference signal symbols with the same subcarrier position.
Step S5 is executed to obtain the reference signal received power based on the correlation factor. The reference signal received power RSRP may be obtained by an average of the sums of the correlation factors.
Specifically, in this embodiment, RSRP may be obtained by the following formula:
formula (6)
Wherein RSRPtemp1 antThe power is received for the reference signal.
Since the reference signal and the interference signal are not correlated, but the reference signal is correlated, even if there is an interference signal on the column corresponding to the reference signal symbol, the absolute value of the real part after conjugate multiplication is the correlation factor, and the part corresponding to the reference signal is actually extracted, therefore, the influence of the interference signal not related to the reference signal is eliminated in the process of obtaining the correlation factor. The RSRP measurement result obtained in the way is accurate.
Referring to fig. 4, a schematic diagram of a second embodiment of the reference signal received power measurement method of the present invention is shown, and the same points in this embodiment as those in the above embodiments are not repeated again, and the difference between this embodiment and the above embodiments is that after the step of obtaining the reference signal received power, the method further includes:
step S6 is executed, and an uncorrelated factor is formed according to the channel and in combination with the irrelevance between the reference signal corresponding to the reference signal symbol with the same subcarrier position and the interference signal.
Referring to fig. 2, taking port 0 as an example for explanation, the positions of the subcarriers where the reference signals of reference signal symbol 0 and reference signal symbol 2 sent by port 0 are located are the same. The reference signal and the interference signal at the corresponding positions of the reference signal symbol 0 and the reference signal symbol 2 are uncorrelated, so that the reference signal and the interference signal at the corresponding positions of the reference signal symbol 0 and the reference signal symbol 2 are uncorrelated by a factor ofSimilarly, the correlation factor between the reference signal corresponding to reference signal symbol 1 and reference signal symbol 3 and the interference signal is 1, and the correlation factor between the reference signal corresponding to reference signal symbol 3 and the interference signal is 1
I.e. the channels of reference signal symbols with the same subcarrier position can be conjugate multiplied, with the absolute value of the imaginary part of the conjugate multiplication as the uncorrelated factor.
Step S7 is executed to obtain the interference signal received power based on the uncorrelated factor. The interference signal received power may be obtained by an average of the sums of the uncorrelated factors. The method comprises the following specific steps:
… … formula (7)
Wherein Npower1 antPower is received for the interfering signal.
By obtaining the interference signal receiving power, the influence of the interference signal on the RSRP measurement can be known more definitely, so that the accuracy of the RSRP measurement can be evaluated.
With continuing reference to fig. 4, after obtaining the interference signal received power, the method preferably further includes:
step S8 is executed to correct the reference signal received power according to the relationship between the reference signal received power and the interference signal received power, so as to obtain a corrected reference signal received power.
By the correction step, the measurement accuracy of RSRP can be further improved.
Referring to fig. 5, a schematic diagram of an embodiment of step S8 in fig. 4 is illustrated. Step S8 generally includes the steps of:
step S81, comparing the relative magnitudes of the interference signal received power and the reference signal received power;
step S82, when the interference signal received power is smaller than the reference signal received power by a first preset multiple, correcting the reference signal received power to obtain a corrected reference signal received power.
Specifically, the first preset multiple may be 3-5 times, and the first preset multiple may be adjusted according to experience, so that the RSRP measurement method is closer to a measurement result obtained in an actual communication process.
For example, the first preset multiple may be 4 times. Accordingly, if the interference signal received power is greater than or equal to 4 times the reference signal received power, the number of interference signals mixed in the interference indicating RSRP measurement is small, and no correction may be performed. On the contrary, if the interference signal received power is less than 4 times the reference signal received power, it indicates that a part of the interference signal is mixed into the reference signal, and the reference signal received power needs to be corrected.
In general, interference signals are easily mixed into reference signals in RSRP measurement. The mixed interference signal can therefore preferably be removed during the correction process.
Referring to fig. 6, a schematic diagram of an embodiment of step S82 of fig. 5 is shown. Specifically, step S82 generally includes the following substeps:
executing step S821, if the interference signal received power is greater than the reference signal received power by a second preset multiple and less than the reference signal received power by a first preset multiple, the corrected reference signal power is the difference between the reference signal received power and one sixteenth interference signal received power;
for example, here the first preset multiple is 4 and the second preset multiple is 2, i.e. if 2RSRPtmp1 ant＜Npower1 ant＜4RSRPtmp1 antThen the corrected reference signal power is RSRPtmp1 ant-1/16Npower1 ant。
Executing step S822, if the interference signal received power is greater than the reference signal received power and less than a second preset multiple of the reference signal received power, where the corrected reference signal power is a difference between the reference signal received power and one eighth of the interference signal received power;
for example, the second preset multiple is 2, i.e. if Npower1 ant＜2RSRPtmp1 antThen the corrected reference signal power is RSRPtmp1 ant-1/8Npower1 ant。
In step S823, if the interference signal received power is smaller than the reference signal received power, the corrected reference signal power is the difference between the reference signal received power and one quarter of the interference signal received power. For example, if Npower1 ant＜RSRPtmp1 antThen the corrected reference signal power is RSRPtmp1 ant-1/4Npower1 ant。
It should be noted that the first preset multiple and the second preset multiple may be adjusted according to experience, and a ratio of the reference signal received power minus the interference signal received power may also be set based on experience, so as to make the corrected reference signal received power more accurate.
The invention also provides a reselection method, which comprises the following steps: measuring the reference signal received power of the current cell and the neighboring cell, where the measurement of the reference signal received power is the above-mentioned measurement method of the reference signal received power, and specifically, the above-mentioned description may be referred to the measurement method of the reference signal received power, and details are not repeated herein;
and when the measured reference signal received power of the adjacent cell is greater than that of the current cell, switching to the adjacent cell for residing.
The invention also provides a reference signal receiving power measuring device, which can be arranged in the UE, is connected with the antenna of the UE and is used for processing the signal received by the antenna. Referring to fig. 7, a schematic diagram of an embodiment of a reference signal received power measurement apparatus according to the present invention is shown. The reference signal received power measuring apparatus includes:
a reference signal unit 100, connected to the antenna, and adapted to find a reference signal and a corresponding reference signal symbol from the signal after the signal is received by the antenna. It should be noted that the reference signal unit 100 may be directly connected to the antenna or indirectly connected to the antenna, and the invention should not be limited thereto.
A frequency domain signal unit 101, connected to the reference signal unit 100, and adapted to obtain a frequency domain signal corresponding to the reference signal symbol found by the reference signal unit 100;
a channel unit 102, connected to the frequency domain signal unit 101 and the reference signal unit 100, and adapted to obtain a channel of a reference signal corresponding to the reference signal symbol based on the frequency domain signal obtained by the frequency domain signal unit 101; specifically, the channel unit 102 usually obtains the channel according to a modulus of the frequency domain signal obtained by the frequency domain signal unit 101 multiplied by the conjugate of the reference signal found by the reference signal unit 100, but the present invention does not limit the way in which the channel unit 102 obtains the channel.
A correlation factor unit 103, connected to the channel unit 102 and the reference signal unit 100, and adapted to form a correlation factor according to the channel obtained by the channel unit 102 and by combining correlations between reference signals corresponding to reference signal symbols with the same subcarrier position found by the reference signal unit 100; specifically, the correlation factor unit 103 may perform conjugate multiplication according to the channels of the reference signal symbols with the same subcarrier position obtained by the channel unit 102, and use the absolute value of the real part of the conjugate multiplication as the correlation factor, but the invention does not limit the way in which the correlation factor unit 103 obtains the correlation factor.
And a reference signal received power unit 104, connected to the correlation factor unit 103, and adapted to obtain a reference signal received power based on the correlation factor formed by the correlation factor unit. In general, the reference signal received power unit 104 is adapted to obtain the reference signal received power according to an average value of the sum of the correlation factors formed by the correlation factor unit 103.
The principle that the reference signal unit 100, the frequency domain signal unit 101, the channel unit 102, the correlation factor unit 103, and the reference signal received power unit 104 cooperate with each other may refer to the content described in the first embodiment of the RSRP measurement method, and is not described herein again.
Referring to fig. 8, a schematic diagram of a reference signal received power measuring apparatus according to a second embodiment of the present invention is shown. The same parts of this embodiment as those of the first embodiment are not repeated, and the difference between this embodiment and the first embodiment is that the apparatus for measuring received power of a reference signal further includes:
an uncorrelated factor unit 105, connected to the channel unit 102 and the reference signal unit 100, and adapted to form an uncorrelated factor according to the channel obtained by the channel unit 102 by combining the irrelevance between the reference signal and the interference signal corresponding to the reference signal symbol with the same subcarrier position found by the reference signal unit 100; the uncorrelated factor unit 105 is adapted to perform conjugate multiplication on the channels of the reference signal symbols with the same subcarrier position obtained by the channel unit 102, and taking an absolute value of an imaginary part of the conjugate multiplication as an uncorrelated factor.
And an interference signal receiving power unit 106, connected to the uncorrelated factor unit 105, and adapted to obtain interference signal receiving power based on the uncorrelated factor formed by the uncorrelated factor unit 105.
The working principle of the uncorrelated factor unit 105 and the interference signal receiving unit 106 can refer to the content described in the second embodiment of the RSRP measurement method, and are not described herein again.
With continuing reference to fig. 8, preferably, the apparatus for measuring reference signal received power further includes:
a correcting unit 107, connected to the reference signal receiving power unit 104 and the interference signal receiving power unit 106, and adapted to correct the reference signal receiving power by combining a relative relationship between the reference signal receiving power obtained by the reference signal receiving power unit 104 and the interference signal receiving power obtained by the interference signal receiving power unit 106, so as to obtain a corrected reference signal receiving power.
The correction unit 107 may determine whether to perform correction by a relative magnitude of the interference signal received power and the reference signal received power.
Specifically, the correction unit 107 includes:
a comparator 1071, having a first preset multiple, connected to the reference signal received power unit 104 and the interference signal received power unit 106, and adapted to compare the relative magnitudes of the interference signal received power and the reference signal received power, and form a trigger signal when the interference signal received power is smaller than the reference signal received power of the first preset multiple;
the corrector 1072, connected to the reference signal received power unit 104 and the comparator 106, is adapted to correct the reference signal received power when receiving the trigger signal sent by the corrector 1070, so as to obtain a corrected reference signal received power.
The corrector 1072 is provided with a first preset multiple and a second preset multiple, the second preset multiple is smaller than the first preset multiple, and the corrector 1072 is further connected with the interference signal receiving power unit 105; the comparator 1071 sends out a first trigger signal when the interference signal received power is greater than the reference signal received power by a second preset multiple and less than the reference signal received power by a first preset multiple; when receiving the first trigger signal, the corrector 1072 obtains the corrected reference signal power according to the difference between the reference signal received power of the reference signal received power unit 104 and the one-sixteenth interference signal received power;
the comparator 1071 may further send a second trigger signal when the interference signal received power is greater than the reference signal received power and less than a second preset multiple of the reference signal received power; the corrector 1072 is adapted to obtain the corrected reference signal power from the difference between the reference signal received power and one eighth of the interference signal received power when receiving the second trigger signal;
the comparator 1071 is adapted to issue a third trigger signal when the interference signal received power is less than the reference signal received power; the corrector 1072 is adapted to obtain the corrected reference signal power when receiving the third trigger signal, according to the reference signal power being the difference between the reference signal received power and one quarter of the interference signal received power.
Correspondingly, the present invention also provides a User Equipment (UE), comprising: the invention provides a reference signal power measuring device. For a specific technical solution of the reference signal power measurement apparatus, please refer to the foregoing contents, which are not described herein again.
Specifically, the user terminal may be a mobile communication device such as a mobile phone. The measuring device may be provided in the mobile phone.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (21)
1. A method for reference signal received power measurement, comprising:
finding out a reference signal and a corresponding reference signal symbol from the received signal;
obtaining a frequency domain signal corresponding to the reference signal symbol from the signal;
obtaining a channel of a reference signal corresponding to the reference signal symbol based on the frequency domain signal;
according to the channel, forming a correlation factor by combining the correlation of the reference signals corresponding to the reference signal symbols with the same subcarrier positions;
and obtaining the reference signal received power based on the correlation factor.
2. The measurement method of claim 1, further comprising:
according to the channel, forming an uncorrelated factor by combining the irrelevance between the reference signal corresponding to the reference signal symbol with the same subcarrier position and the interference signal;
and obtaining the interference signal receiving power based on the uncorrelated factor.
3. The measurement method of claim 2, further comprising:
and correcting the reference signal received power by combining the relation between the reference signal received power and the interference signal received power to obtain the corrected reference signal received power.
4. The measurement method of claim 3, wherein the step of obtaining the corrected reference signal received power comprises:
comparing the relative magnitude of the interference signal received power and the reference signal received power;
and when the interference signal receiving power is smaller than the reference signal receiving power of a first preset multiple, correcting the reference signal receiving power to obtain the corrected reference signal receiving power.
5. The measurement method of claim 4, wherein the step of correcting the reference signal received power to obtain a corrected reference signal received power comprises:
if the interference signal received power is greater than the reference signal received power of a second preset multiple and less than the reference signal received power of a first preset multiple, the corrected reference signal power is the difference between the reference signal received power and one sixteenth interference signal received power;
if the interference signal received power is greater than the reference signal received power and less than a second preset multiple of the reference signal received power, the corrected reference signal power is the difference between the reference signal received power and one eighth of the interference signal received power;
and if the interference signal receiving power is smaller than the reference signal receiving power, the corrected reference signal power is the difference between the reference signal receiving power and one fourth of the interference signal receiving power.
6. The measurement method of claim 1, wherein the step of obtaining channels corresponding to reference signal symbols based on the frequency domain signal comprises:
and obtaining the channel based on the conjugate multiplication of the frequency domain signal and the reference signal.
7. The method of claim 1, wherein the step of forming correlation factors according to the channel in combination with reference signal correlations of reference signal symbols having the same subcarrier position comprises:
and carrying out conjugate multiplication on channels of the reference signal symbols with the same subcarrier positions, and taking the absolute value of the conjugate multiplication real part as a correlation factor.
8. The measurement method of claim 2, wherein the step of forming an uncorrelated factor according to the channel in combination with the uncorrelated of the reference signals and the interfering signals of the reference signal symbols with the same subcarrier position comprises:
and carrying out conjugate multiplication on channels of the reference signal symbols with the same subcarrier positions, and taking the absolute value of the imaginary part of the conjugate multiplication as an uncorrelated factor.
9. The measurement method of claim 1, wherein the step of obtaining the reference signal received power based on the correlation factor comprises:
the reference signal received power is obtained by averaging the sum of the correlation factors.
10. A method of reselection, comprising:
measuring the reference signal received power of the current cell and the adjacent cell, wherein the measurement of the reference signal received power is the reference signal received power measurement method in any one of claims 1 to 9;
and when the measured reference signal received power of the adjacent cell is greater than that of the current cell, switching to the adjacent cell for residing.
11. A reference signal received power measurement apparatus, comprising:
a reference signal unit adapted to find a reference signal and a corresponding reference signal symbol;
the frequency domain signal unit is connected with the reference signal unit and is suitable for obtaining a frequency domain signal corresponding to the reference signal symbol found by the reference signal unit;
the channel unit is connected with the frequency domain signal unit and the reference signal unit and is suitable for obtaining a channel of a reference signal corresponding to the reference signal symbol based on the frequency domain signal obtained by the frequency domain signal unit;
the correlation factor unit is connected with the channel unit and the reference signal unit and is suitable for forming a correlation factor according to the channel obtained by the channel unit and by combining the correlation between the reference signals corresponding to the reference signal symbols with the same subcarrier positions found by the reference signal unit;
and the reference signal receiving power unit is connected with the correlation factor unit and is suitable for obtaining the reference signal receiving power based on the correlation factor formed by the correlation factor unit.
12. The measurement device of claim 11, further comprising:
the uncorrelated factor unit is connected with the channel unit and the reference signal unit and is suitable for forming uncorrelated factors according to the channel obtained by the channel unit and by combining the irrelevance between reference signals corresponding to reference signal symbols with the same subcarrier positions found by the reference signal unit and interference signals;
and the interference signal receiving power unit is connected with the uncorrelated factor unit and is suitable for obtaining the interference signal receiving power based on the uncorrelated factor.
13. The measurement device of claim 12, further comprising:
and the correction unit is connected with the reference signal receiving power unit and the interference signal receiving power unit and is suitable for correcting the reference signal receiving power by combining the relative relation between the reference signal receiving power obtained by the reference signal receiving power unit and the interference signal receiving power obtained by the interference signal receiving power unit so as to obtain the corrected reference signal receiving power.
14. The measurement device of claim 13, wherein the correction unit comprises:
the comparator is connected with the reference signal receiving power unit and the interference signal receiving power unit and is suitable for comparing the relative magnitude of the interference signal receiving power and the reference signal receiving power and forming a trigger signal when the interference signal receiving power is smaller than the reference signal receiving power of a first preset multiple;
and the corrector is connected with the reference signal receiving power unit and the comparator and is suitable for correcting the reference signal receiving power when receiving the trigger signal sent by the corrector so as to obtain the corrected reference signal receiving power.
15. The measurement device of claim 14, wherein the corrector is further coupled to the interfering signal receiving power unit;
the comparator is suitable for sending a first trigger signal when the interference signal receiving power is larger than the reference signal receiving power of a second preset multiple and smaller than the reference signal receiving power of a first preset multiple; the corrector is suitable for obtaining the corrected reference signal power according to the difference between the reference signal receiving power and one sixteenth interference signal receiving power when the first trigger signal is received;
the comparator is suitable for sending a second trigger signal when the interference signal receiving power is larger than the reference signal receiving power and smaller than a second preset multiple of the reference signal receiving power; the corrector is suitable for obtaining the corrected reference signal power according to the difference between the reference signal receiving power and one eighth of the interference signal receiving power when the second trigger signal is received;
the comparator is suitable for sending out a third trigger signal when the interference signal receiving power is smaller than the reference signal receiving power; the corrector is suitable for obtaining the corrected reference signal power according to the difference between the reference signal receiving power and one fourth of the interference signal receiving power when the third trigger signal is received.
16. The measurement apparatus according to claim 11, wherein the channel unit is adapted to obtain the channel according to a modulus of a multiplication of the frequency domain signal obtained by the frequency domain signal unit and a conjugate of the reference signal found by the reference signal unit.
17. The measurement apparatus according to claim 11, wherein the correlation factor unit is adapted to perform conjugate multiplication on channels of reference signal symbols having the same subcarrier position obtained by the channel unit, and an absolute value of a real part of the conjugate multiplication is used as the correlation factor.
18. The measurement arrangement according to claim 12, characterized in that the uncorrelation factor unit is adapted to conjugate multiply the channels of reference signal symbols with the same subcarrier position obtained by the channel unit, with the absolute value of the imaginary part of the conjugate multiplication as the uncorrelation factor.
19. The measurement apparatus according to claim 11, wherein the reference signal received power unit is adapted to obtain the reference signal received power according to an average of the sum of the correlation factors formed by the correlation factor unit.
20. A user terminal, comprising: the apparatus for measuring power of a reference signal according to any one of claims 11-19.
21. The user terminal according to claim 20, wherein the user terminal is a mobile phone, and the measuring device is disposed in the mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015137.XA CN103929772B (en) | 2013-01-16 | 2013-01-16 | Reference signal received power measurement method and device, the method for gravity treatment, user terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015137.XA CN103929772B (en) | 2013-01-16 | 2013-01-16 | Reference signal received power measurement method and device, the method for gravity treatment, user terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103929772A true CN103929772A (en) | 2014-07-16 |
| CN103929772B CN103929772B (en) | 2017-06-16 |
Family
ID=51147816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310015137.XA Active CN103929772B (en) | 2013-01-16 | 2013-01-16 | Reference signal received power measurement method and device, the method for gravity treatment, user terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103929772B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104539383A (en) * | 2014-12-30 | 2015-04-22 | 中国电子科技集团公司第四十一研究所 | Real-time pulse signal power capturing device and implement method thereof |
| CN105992265A (en) * | 2015-01-30 | 2016-10-05 | 电信科学技术研究院 | Cell measuring method and terminal |
| CN107306245A (en) * | 2016-04-22 | 2017-10-31 | 展讯通信（上海）有限公司 | Obtain the device and method of Reference Signal Received Quality |
| WO2018126404A1 (en) * | 2017-01-05 | 2018-07-12 | Motorola Mobility Llc | Beam quality determination |
| CN108632932A (en) * | 2018-06-21 | 2018-10-09 | 维沃移动通信有限公司 | The switching method and device of cell |
| CN110602014A (en) * | 2019-09-11 | 2019-12-20 | 武汉剑通信息技术有限公司 | Sampling time deviation estimation method based on LTE downlink reference signal |
| US11405939B2 (en) | 2017-01-05 | 2022-08-02 | Motorola Mobility Llc | Scheduling request indication |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090068956A1 (en) * | 2007-09-06 | 2009-03-12 | Nec Corporation | Method and device for estimating reception quality in radio communication |
| CN101599939A (en) * | 2009-07-10 | 2009-12-09 | 北京天碁科技有限公司 | The method of estimation of the Reference Signal Received Power of ofdm system and device |
| CN102088423A (en) * | 2010-12-14 | 2011-06-08 | 北京邮电大学 | Method and device for measuring reference signal receiving power of time division duplex system |
-
2013
- 2013-01-16 CN CN201310015137.XA patent/CN103929772B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090068956A1 (en) * | 2007-09-06 | 2009-03-12 | Nec Corporation | Method and device for estimating reception quality in radio communication |
| CN101599939A (en) * | 2009-07-10 | 2009-12-09 | 北京天碁科技有限公司 | The method of estimation of the Reference Signal Received Power of ofdm system and device |
| CN102088423A (en) * | 2010-12-14 | 2011-06-08 | 北京邮电大学 | Method and device for measuring reference signal receiving power of time division duplex system |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104539383A (en) * | 2014-12-30 | 2015-04-22 | 中国电子科技集团公司第四十一研究所 | Real-time pulse signal power capturing device and implement method thereof |
| CN104539383B (en) * | 2014-12-30 | 2017-05-10 | 中国电子科技集团公司第四十一研究所 | Real-time pulse signal power capturing device and implement method thereof |
| CN105992265A (en) * | 2015-01-30 | 2016-10-05 | 电信科学技术研究院 | Cell measuring method and terminal |
| CN105992265B (en) * | 2015-01-30 | 2019-09-17 | 电信科学技术研究院 | A kind of cell measuring method and terminal |
| CN107306245A (en) * | 2016-04-22 | 2017-10-31 | 展讯通信（上海）有限公司 | Obtain the device and method of Reference Signal Received Quality |
| CN107306245B (en) * | 2016-04-22 | 2020-09-01 | 展讯通信（上海）有限公司 | Device and method for acquiring reference signal receiving quality |
| WO2018126404A1 (en) * | 2017-01-05 | 2018-07-12 | Motorola Mobility Llc | Beam quality determination |
| US11405939B2 (en) | 2017-01-05 | 2022-08-02 | Motorola Mobility Llc | Scheduling request indication |
| CN108632932A (en) * | 2018-06-21 | 2018-10-09 | 维沃移动通信有限公司 | The switching method and device of cell |
| CN110602014A (en) * | 2019-09-11 | 2019-12-20 | 武汉剑通信息技术有限公司 | Sampling time deviation estimation method based on LTE downlink reference signal |
| CN110602014B (en) * | 2019-09-11 | 2022-03-11 | 武汉精盾信息技术有限公司 | Sampling time deviation estimation method based on LTE downlink reference signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103929772B (en) | 2017-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103929772B (en) | Reference signal received power measurement method and device, the method for gravity treatment, user terminal | |
| CN102088423B (en) | Method and device for measuring reference signal receiving power of time division duplex system | |
| US8547821B2 (en) | Method and apparatus for investigating whether a given signal is received in a given set of OFDMA resource elements | |
| US9614700B2 (en) | Techniques for channel estimation in millimeter-wave communication systems | |
| US20150189608A1 (en) | LTE-Advanced Sample Clock Timing Acquisition | |
| AU2017219686B2 (en) | NB-loT receiver operating at minimum sampling rate | |
| US20160135066A1 (en) | Method and Device for Calculating Reference Signal Received Power | |
| CN107454027B (en) | Frequency offset estimation method and device | |
| WO2015159616A1 (en) | Estimation apparatus and program | |
| US9445382B2 (en) | Method and device for detecting secondary synchronous signal, computer program and storage medium | |
| US9143364B2 (en) | IQ imbalance estimation using broadcast signals | |
| CN103701744B (en) | A kind of interference detection method and device | |
| WO2012092751A1 (en) | Method and system for neighboring cell interference detection | |
| CN106375251A (en) | Noise power estimating method and apparatus, and user equipment | |
| KR20140012890A (en) | Secondary synchronization signal detection with interference cancelation for lte | |
| CN102035768A (en) | Method and device for measuring carrier to interference and noise ratio | |
| CN103731384A (en) | Method and device for suppressing interference | |
| CN113037590B (en) | Time delay estimation method and device used in communication system | |
| JP2015065655A (en) | Method, terminal and system for determining reference signal received power | |
| CN113271279A (en) | High-precision detection method for random access channel of narrow-band Internet of things | |
| CN101719881B (en) | Estimation method and device of noise power as well as communication system | |
| CN101945070B (en) | Method and device for measuring noise | |
| KR20140107998A (en) | Method and apparatus for detecting signal | |
| WO2017181352A1 (en) | Timing offset estimation in an ofdm-based system by sinr measurement | |
| CN101895351B (en) | Method and device for measuring noise variance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180408 Address after: The 300456 Tianjin FTA test area (Dongjiang Bonded Port) No. 6865 North Road, 1-1-1802-7 financial and trade center of Asia Patentee after: Xinji Lease (Tianjin) Co.,Ltd. Address before: Zuchongzhi road in Pudong Zhangjiang hi tech park Shanghai 201203 Lane 2288 Pudong New Area Spreadtrum Center Building 1 Patentee before: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20140716 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xinji Lease (Tianjin) Co.,Ltd. Contract record no.: 2018990000196 Denomination of invention: Reference signal receiving power measuring method and device, reselection method and user terminal Granted publication date: 20170616 License type: Exclusive License Record date: 20180801 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221019 Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: 1-1-1802-7, North Area of Financial and Trade Center, No. 6865, Asia Road, Tianjin Pilot Free Trade Zone (Dongjiang Bonded Port Area), 300456 Patentee before: Xinji Lease (Tianjin) Co.,Ltd. |