CN103929772B - Reference signal received power measurement method and device, the method for gravity treatment, user terminal - Google Patents
Reference signal received power measurement method and device, the method for gravity treatment, user terminal Download PDFInfo
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Abstract
The present invention provides a kind of reference signal received power measurement method and device, the method for gravity treatment, user terminal.The measuring method reference signal received power measurement method, including：Reference signal and corresponding reference signal symbol are found out from the signal for receiving；The frequency-region signal corresponding with the reference signal symbol is obtained from the signal；Based on the frequency-region signal, the channel of the reference signal corresponding with the reference signal symbol is obtained；According to the channel, with reference to the correlation of the corresponding reference signal of sub-carrier positions identical reference signal symbol, correlation factor is formed；Reference Signal Received Power is obtained based on the correlation factor.The method of the gravity treatment includes the measuring method.Present invention also offers the measurement apparatus corresponding with the reference signal received power measurement method.The user terminal includes the measurement apparatus, and the present invention improves the certainty of measurement of RSRP.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of reference signal received power measurement method and device, weight
The method of choosing, user terminal.
Background technology
In the GSM of Long Term Evolution (LTE, Long Term Evolution), cell reselection is idle mould
One of most important task in formula.By cell reselection, user terminal (User Experience, UE) can be resident high-quality
In cell.
Specifically, after some cell that UE is resident LTE system, constantly to current area and can close on small
The signal quality in area is measured, and when the signal quality for finding other cells meets the requirement of regulation, UE ends can be by cell
In cell of the gravity treatment from current area gravity treatment to better quality.It should be noted that in LTE system, the measurement is to pass through
Measuring reference signals receiving power (Reference Signal Receiving Power, RSRP) and complete.
A kind of RSRP measuring methods are disclosed in the Chinese patent application of Publication No. CN102457469A, with reference to Fig. 1,
Show the schematic diagram of RSRP measuring methods in the Chinese patent.Methods described includes：Signal to receiving enters line frequency and moves
Position so that upper half belt or the change of lower half band are able to centered on DC frequencies；The signal extraction that will be received is the n2m width of sample
Degree, n is the fiducial mark being spaced in the received signal；Sample is divided into n sample vector, each sample vector has 2m
Length, n described sample vector of superposition；And the signal to being superimposed performs FFT computings, to be sent from by a base station
Signal in obtain the fiducial mark carrier wave of continuum, the fiducial mark carrier wave is applied to and determines the letter that is sent by the base station
Number the reference signal receiving power.RSRP measuring methods are relatively simple disclosed in the Chinese patent application.
However, for cell reselection, the precision of RSRP measurements is extremely important.Because if RSRP measurements are not accurate enough
Really, in preventing the UE cells best from residing in signal quality, so as to have impact on Consumer's Experience.How RSRP measurement is improved
Precision is one of those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
The problem to be solved in the present invention is to provide a kind of Reference Signal Received Power that can improve RSRP certainties of measurement and surveys
Amount method and device, the method for gravity treatment, user terminal.
In order to solve the above problems, the present invention provides a kind of reference signal received power measurement method, including：From what is received
Reference signal and corresponding reference signal symbol are found out in signal；Obtain relative with the reference signal symbol from the signal
The frequency-region signal answered；Based on the frequency-region signal, the channel of the reference signal corresponding with the reference signal symbol is obtained；Root
According to the channel, with reference to the correlation of the corresponding reference signal of sub-carrier positions identical reference signal symbol, formed it is related because
Son；Reference Signal Received Power is obtained based on the correlation factor.
Alternatively, also include：According to the channel, with reference to the corresponding reference of sub-carrier positions identical reference signal symbol
Signal and the irrelevance of interference signal, form the uncorrelated factor；Interference signal is obtained based on the uncorrelated factor and receives work(
Rate.
Alternatively, also include：It is right with reference to the relation between the Reference Signal Received Power and interference signal receiving power
The Reference Signal Received Power is corrected, with Reference Signal Received Power after being corrected.
Alternatively, include the step of Reference Signal Received Power after being corrected：Compare the interference signal receiving power
With the relative size of the Reference Signal Received Power；In the interference signal receiving power less than described in the first preset multiple
During Reference Signal Received Power, the Reference Signal Received Power is corrected, work(is received with reference signal after being corrected
Rate.
Alternatively, the Reference Signal Received Power is corrected, the step of Reference Signal Received Power after being corrected
Suddenly include：If the interference signal receiving power more than the second preset multiple the Reference Signal Received Power and less than the
The Reference Signal Received Power of one preset multiple, reference signal power is the Reference Signal Received Power after the correction
With the difference of 1/16th interference signal receiving power；
If the interference signal receiving power is more than the Reference Signal Received Power and less than the second preset multiple
The Reference Signal Received Power, reference signal power is the Reference Signal Received Power and 1/8th institutes after the correction
State the difference of interference signal receiving power；If interference signal receiving power is less than the Reference Signal Received Power, the correction
Reference signal power is the difference of the Reference Signal Received Power and interference signal receiving power described in a quarter afterwards.
Alternatively, it is described based on the frequency-region signal, include the step of obtain the channel corresponding with reference signal symbol：
Conjugate multiplication based on frequency-region signal with the reference signal, obtains the channel.
Alternatively, according to the channel, with reference to the reference signal correlation of sub-carrier positions identical reference signal symbol,
The step of forming correlation factor includes：The channel of sub-carrier position identical reference signal symbol carries out conjugate multiplication, with altogether
The absolute value of yoke multiplication real part is used as correlation factor.
Alternatively, according to the channel, with reference to reference signal and the interference of sub-carrier positions identical reference signal symbol
The step of the being not related to property of signal, formation uncorrelated factor, includes：The channel of sub-carrier position identical reference signal symbol enters
Row conjugate multiplication, using the absolute value of the imaginary part of conjugate multiplication as the uncorrelated factor.
Alternatively, the step of acquisition Reference Signal Received Power based on the correlation factor includes：By the phase
The average for closing the sum of the factor obtains the Reference Signal Received Power.
Correspondingly, the present invention provides a kind of method of gravity treatment, including：Reference signal is carried out to current area and adjacent cell
The measurement of receiving power, the reference signal received power measurement method described in the measurement of the Reference Signal Received Power；Surveying
When the Reference Signal Received Power measured to adjacent cell is more than the Reference Signal Received Power of current area, adjacent cell is switched to
It is resident.
Correspondingly, the present invention also provides a kind of Reference Signal Received Power measurement apparatus, including：Reference signal unit, fits
For finding out reference signal and corresponding reference signal symbol；The frequency-region signal unit being connected with the reference signal unit, fits
For obtaining the frequency-region signal corresponding with the reference signal symbol that reference signal unit is found out；With the frequency-region signal unit,
The connected Channel Elements of the reference signal unit, it is adaptable to based on the frequency-region signal that the frequency-region signal unit is obtained, obtain
The channel of the reference signal corresponding with the reference signal symbol；It is connected with the Channel Elements, the reference signal unit
Correlation factor unit, it is adaptable to according to the Channel Elements obtain channel, with reference to the subcarrier that reference signal unit is found out
Correlation between the corresponding reference signal of position identical reference signal symbol, forms correlation factor；With the correlation factor
The connected Reference Signal Received Power unit of unit, it is adaptable to based on the correlation factor that the correlation factor unit is formed, obtains
Reference Signal Received Power.
Alternatively, also include：The uncorrelated factor unit connected to the Channel Elements, reference signal unit, it is adaptable to
According to the channel that the Channel Elements are obtained, with reference to the sub-carrier positions identical reference signal symbol that reference signal unit is found out
Irrelevance between corresponding reference signal and interference signal, forms the uncorrelated factor；To the uncorrelated factor unit phase
Interference signal receiving power unit even, it is adaptable to which interference signal receiving power is obtained based on the uncorrelated factor.
Alternatively, also include：It is connected with the Reference Signal Received Power unit, the interference signal receiving power unit
Correction unit, it is adaptable to reference to Reference Signal Received Power unit obtain Reference Signal Received Power, the interference signal
Relativeness between the interference signal receiving power that receiving power unit is obtained, school is carried out to the Reference Signal Received Power
Just, with Reference Signal Received Power after being corrected.
Alternatively, the correction unit includes：Work(is received with the Reference Signal Received Power unit, the interference signal
The connected comparator of rate unit, it is adaptable to which relatively more described interference signal receiving power is relatively large with the Reference Signal Received Power
It is small, in the Reference Signal Received Power of the interference signal receiving power less than the first preset multiple, form triggering letter
Number；The adjuster being connected with the Reference Signal Received Power unit, the comparator, it is adaptable to receiving the adjuster
During the trigger signal for sending, the Reference Signal Received Power is corrected, with Reference Signal Received Power after being corrected.
Alternatively, the adjuster is also connected with the interference signal receiving power unit；The comparator is applied to
The interference signal receiving power is more than the Reference Signal Received Power of the second preset multiple and less than the first preset multiple
The Reference Signal Received Power when, send the first trigger signal；The adjuster be applied to receive described first touch
During signalling, according to the Reference Signal Received Power and the difference of 1/16th interference signal receiving power, the school is obtained
Reference signal power after just；The comparator is applied in the interference signal receiving power more than reference signal reception work(
When rate and the Reference Signal Received Power less than the second preset multiple, the second trigger signal is sent；The adjuster is applicable
In when second trigger signal is received, the interference signal according to the Reference Signal Received Power with 1/8th connects
The difference of power is received, reference signal power after the correction is obtained；The comparator is applied in the interference signal receiving power
During less than the Reference Signal Received Power, the 3rd trigger signal is sent；The adjuster is suitable for receiving the described 3rd
During trigger signal, according to the reference signal power be the Reference Signal Received Power with a quarter described in interference signal connect
The difference of power is received, reference signal power after the correction is obtained.
Alternatively, the Channel Elements, it is adaptable to the frequency-region signal obtained according to the frequency-region signal unit and the ginseng
The mould of the conjugate multiplication of the reference signal that signal element is found out is examined, the channel is obtained.
Alternatively, the correlation factor unit, it is adaptable to which the sub-carrier positions identical obtained to Channel Elements is with reference to letter
The channel of number symbol carries out conjugate multiplication, using the absolute value of conjugate multiplication real part as correlation factor.
Alternatively, the uncorrelated factor unit, it is adaptable to the sub-carrier positions identical reference that Channel Elements are obtained
The channel of signal code carries out conjugate multiplication, using the absolute value of the imaginary part of conjugate multiplication as the uncorrelated factor.
Alternatively, the Reference Signal Received Power unit, it is adaptable to according to the correlation that the correlation factor unit is formed
The average of the sum of the factor, obtains the Reference Signal Received Power.
Alternatively, a kind of user terminal, including：The measurement apparatus of described reference signal power.
Alternatively, the user terminal is mobile phone, and the measurement apparatus are arranged in the mobile phone.
Compared with prior art, technical scheme has advantages below：
Due between reference signal and interference signal and uncorrelated, and it is related between reference signal, therefore, even if in reference
There is interference signal on the corresponding row of signal code, according to the channel, accorded with reference to sub-carrier positions identical reference signal
The correlation of number corresponding reference signal, when forming correlation factor, extraction is the corresponding part of reference signal, therefore, subtract
The influence of interference signal is lacked, improve the accuracy that RSRP is measured.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of RSRP of prior art；
Fig. 2 is two-port reference signal resource mapping graph；
Fig. 3 is the schematic flow sheet of RSRP measuring methods first embodiment of the present invention；
Fig. 4 is the schematic flow sheet of RSRP measuring methods second embodiment of the present invention；
Fig. 5 is the schematic flow sheet of the embodiment of step S8 shown in Fig. 4 mono-；
Fig. 6 is the schematic flow sheet of the embodiment of step S82 shown in Fig. 5 mono-；
Fig. 7 is the schematic diagram of RSRP measurement apparatus first embodiment of the present invention；
Fig. 8 is the schematic diagram of RSRP measurement apparatus second embodiment of the present invention.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Many details are elaborated in the following description in order to fully understand the present invention, but the present invention can be with
Other manner described here is different from using other to implement, therefore the present invention is not limited by following public specific embodiment
System.
In order to solve the problems of the prior art, the present inventor is carried out to reference signal received power measurement method
Numerous studies.With reference to Fig. 2, two-port reference signal resource mapping graph is shown.The reference signal for being sent for cell herein
Schematic diagram, it is necessary to explanation, be herein by cell have two antenna ports (port 0 and port 1) as a example by illustrate, but
It is that can not can also be the cell of an antenna port or four antenna ports in this, as limitation, with varying number antenna
The method that port cell carries out RSRP calculating is the same, can correspondingly be deformed, changed and replaced.
In Fig. 2, each blockage represents a resource particle (Resource Element, RE), in port 0 and port 1
Horizontal direction is the time, and vertical direction is frequency.R0For the first reference signal S1, R that port 0 sends1For port 1 send
Two reference signal S2, in order to the reference signal for preventing same cell different port from sending is obscured, first are sent with reference to letter in port 0
The position of number S1 sets non-emissive signal S0 in being in port 1, similarly, the position of the second reference signal S2 is sent in port 1
It is in port 0 and non-emissive signal S0 is set.
In the reference signal that either port 0 or port 1 send, (Resource Block, RB lead to a Resource Block
Reference signal includes 6 RB in normal LTE system, in Fig. 2 by taking RB0 as an example) there are 12 subcarriers on frequency domain, have in time domain
There are 14 symbols, and reference signal (R0Or R1) where position 6 subcarriers are differed on frequency domain, in time domain differ 4 symbol
Number.Specifically, one 4 reference signal symbols are had suitable for measurement, can are 0 by four sign flags in order to express easily,
1.2,3.
Specifically, what RSRP was tested is the linear averaging to the reference signal in certain frequency band (i.e. several Resource Block)
Power.Therefore, RSRP is represented by below equation：
Formula (1)
Wherein, Hi(k, l) is the letter that i-th reception antenna correspondence reference signal is estimated at (k, l) place on antenna port 0
Road, HiThe mould of (k, l) square for reference signal power;(k, l) represents the corresponding resource of l-th symbol, k-th subcarrier
Particle (Resource Element, RE);N, L represent the sequence number and OFDM (Orthogonal of Resource Block respectively
Frequency-Division Multiplexing, OFDM) symbolic number.
By taking port 0 as an example, that formula (1) is represented is the R of all positions in bitmap 20The power sum of corresponding channel it is equal
Value.
But, inventor is had found signal to noise ratio is relatively low or during larger co-channel interference, carried out using the method for formula (1)
RSRP measurement errors are larger.Because UE can also connect while the reference signal that Target cell to be measured sends is received
Receive the homogenous frequency signal that the interfered cell with different Cell ID sends.Interfered cell with different Cell ID is small with target
Position of the reference signal in area in mapping graph is different, therefore, such as F (does not ideally have ginseng at the position in fig. 2
Examine signal) position at interference signal produced by the reference signal sent as interfered cell occurs.Carried out using formula (1)
When RSRP is calculated, the interference signal can also be applied, and the RSRP measured UE produces interference.Therefore, in order to improve
The certainty of measurement of RSRP, in addition to needing to be removed white noise, in addition it is also necessary to estimate to the error that interfered cell is brought
Meter, in order to the error for estimating is removed.
However, it is found by the inventors that if the amount of calculation using the method calculating interfered cell power similar to formula (1)
It is very big.
In order to solve the above problems, inventor be based on LTE system in reference signal be pseudo-random signal the characteristics of, there is provided
A kind of reference signal received power measurement method.With reference to Fig. 3, reference signal received power measurement method of the present invention first is shown
The schematic flow sheet of embodiment.The measuring method generally comprises following steps：
Step S1 is performed, reference signal and corresponding reference signal symbol are found out from the signal for receiving.
Specifically, after some cell (i.e. current area where UE) that UE is resident LTE system, can receive
The signal that adjacent cell (i.e. Target cell) to current area is launched to UE.After UE receives the signal, can be to the letter
Number it is analyzed and extracts, find out the reference signal included in the signal, to carry out RSRP measurements, and then judges the target
Whether the signal quality of cell meets the requirement of cell reselection.
Please continue to refer to Fig. 2, a kind of mapping graph of template of reference signal is illustrated.This sentences adjacent cell for two antennas
As a example by illustrate, but the invention is not limited in this regard.
As shown in Fig. 2 in LTE system, reference signal (S1 or S2) differs 4 reference signal symbols in time domain.Tool
Body ground, reference signal is located on 4 different row in the template, i.e., one has 4 reference signal symbols is applied to measurement,
In order to express easily, can be 0,1,2,3 by four sign flags.UE is from receiving to find out the reference signal in signal
Afterwards, in addition it is also necessary to which the reference signal is processed, reference signal symbol is extracted.
It should be noted that reference signal is found out from signal, the method that reference symbol is found out from the reference signal
It is same as the prior art, will not be repeated here.
Step S2 is performed, the frequency-region signal corresponding with the reference signal symbol is obtained from the signal.Such as Fig. 2 institutes
Show, in LTE system, reference symbol differs 6 subcarriers on frequency domain direction.UE obtains reference signal symbol on time domain direction
Number afterwards, the frequency-region signal corresponding with the reference signal symbol is obtained, with Yi(k, l) represents i-th (i is 0 or 1) root antenna
K-th subcarrier on l-th symbol, frequency domain in the time domain for sending frequency-region signal corresponding when being received by UE.
It should be noted that the frequency-region signal YiExcept receiving the reference signal that antenna sends in (k, l), also include
White noise signal, and the interference signal that co-frequency cell produces.
Therefore, without loss of generality, i reception antennas receive signal and can be expressed as follows：
K=1 ... ..., 2N；L=1 ... ..., L formula (2)
Wherein, Hi 0(k, l), Si 0(k, l) is respectively channel and the reference signal that UE is estimated.Likewise, Hi n(k, l),
Si n(k, l) is respectively interfered cell n=1 ... ..., NcellIn the channel and reference signal of RE (k, l) corresponding position, wherein
NcellIt is the number of interfered cell.The Ni(k, l) is white noise.
Step S3 is performed, based on the frequency-region signal, the reference signal corresponding with the reference signal symbol is obtained
Channel.
It is not difficult to find out that there is the reference signal S that the interfered cell of different Cell ID sends from Target cell by formula (2)i n
(k, l) and Si 0(k, l) is different signals, and both are uncorrelated, simply general data-signal.That is, actual for mesh
For mark cell, the reference signal S that interfered cell sendsi n(k, l) is similar with white noise.Therefore, the frequency domain symbol is also
Can be expressed as：
Formula (3)
Wherein,It is equivalent to the combination of white noise and the reference signal of interfered cell.
In actual communication process, UE receives the frequency-region signal YiAfter (k, l), with reference to formula (3), can be by as follows
Relational expression obtains channel：
Formula (4)
That is, frequency-region signal Y can be based oni(k, l) and the reference signal Si 0The conjugate multiplication of (k, l), obtains
The channel.
Wherein,Generally,Therefore, formula (4) can be with table
Up to for：
Formula (5)
That is, the channel that UE is estimated includes the corresponding channel of reference signalAnd noiseIts
Described in noise include the interference signal that sends of white noise and interfered cell.
Step S4 is performed, it is corresponding with reference to letter with reference to sub-carrier positions identical reference signal symbol according to the channel
Number correlation, formed correlation factor.
However, still containing the influence of white noise and interference signal in the channel of step S3 acquisitions.The present invention is in order to more
The measurement of RSRP is accurately realized, it is necessary to by the H in formula (5)i 0(k, l), calculates different antennae and sends out by formula (1) afterwards
The average of the power sum of the corresponding channel in all reference signal positions for going out.And then measurement of the realization to RSRP.
Inventor has found first, there is the reference signal S that the interfered cell of different Cell ID sends from Target celli n
(k, l) and Si 0(k, l) is different signals, and both have irrelevance.And between the reference signal that Target cell sends it is phase
Same signal, both have very strong correlation.Therefore, can by reference to the correlation of signal the characteristics of, based on formula (4),
The reference signal of Target cell is extracted with reference to correlation, to obtain RSRP.
Secondly, reference signal is a kind of pseudo-random signal, please continue to refer to Fig. 2, is illustrated by taking port 0 as an example, port 0
The reference signal symbol 0 for sending is identical with the sub-carrier positions where the reference signal of reference signal symbol 2, and reference signal is accorded with
Number 1 and reference signal symbol 3 reference signal where sub-carrier positions as identical.That is, reference signal symbol 0 and ginseng
Examine that the corresponding reference signal correlation of signal code 2 is stronger, both correlation factors are
And reference signal symbol 1 and the corresponding reference signal correlation of reference signal symbol 3 are also relatively strong, both correlation factors are
Conjugate multiplication can be carried out by the channel of sub-carrier position identical reference signal symbol, with conjugate multiplication
The absolute value of real part is used as correlation factor.
Step S5 is performed, Reference Signal Received Power is obtained based on the correlation factor.Can be by the correlation factor
The average of sum obtain the Reference Signal Received Power RSRP.
Specifically, in the present embodiment, RSRP can be obtained by below equation：
Formula (6)
Wherein RSRPtemp1 antIt is Reference Signal Received Power.
Due between reference signal and interference signal and uncorrelated, and it is related between reference signal, therefore, even if in reference
There is interference signal, the absolute value of the real part after conjugate multiplication is done is correlation factor, actual on the corresponding row of signal code
What is extracted is the corresponding part of reference signal, therefore, eliminated and reference during this acquisition correlation factor
The influence of the incoherent interference signal of signal.The measurement result of the RSRP for so obtaining is more accurate.
With reference to Fig. 4, the schematic diagram of reference signal received power measurement method second embodiment of the present invention, this reality are illustrated
Example is applied to be repeated no more with the something in common of above-described embodiment, the present embodiment with it is above-mentioned be that the difference of embodiment is to obtain
After the step of obtaining Reference Signal Received Power, also include：
Step S6 is performed, it is corresponding with reference to letter with reference to sub-carrier positions identical reference signal symbol according to the channel
Irrelevance number with interference signal, forms the uncorrelated factor.
Please continue to refer to Fig. 2, illustrated by taking port 0 as an example, reference signal symbol 0 and reference signal that port 0 sends
Sub-carrier positions where the reference signal of symbol 2 are identical.The ginseng of reference signal symbol 0 and the correspondence position of reference signal symbol 2
Examine uncorrelated between signal and interference signal, therefore, reference signal symbol 0 and the corresponding reference signal of reference signal symbol 2 with
The uncorrelated factor of interference signal isSimilarly, reference signal symbol 1 and reference signal
The corresponding reference signal of symbol 3 is that 1 and the corresponding reference signal of reference signal symbol 3 are related to the uncorrelated factor of interference signal
Property it is also relatively strong, both correlation factors are
Conjugate multiplication can be carried out with the channel of sub-carrier position identical reference signal symbol, with the void of conjugate multiplication
The absolute value in portion is used as the uncorrelated factor.
Step S7 is performed, interference signal receiving power is obtained based on the uncorrelated factor.Can be by described uncorrelated
The average of the sum of the factor obtains the interference signal receiving power.It is specific as follows：
... formula (7)
Wherein Npower1 antIt is interference signal receiving power.
By obtaining the interference signal receiving power, the shadow that interference signal is measured RSRP more can be clearly known
Ring, such that it is able to assess the precision of RSRP measurements.
Please continue to refer to Fig. 4, it is preferred that after interference signal receiving power is obtained, also including：
Step S8 is performed, with reference to the relation between the Reference Signal Received Power and interference signal receiving power, to institute
State Reference Signal Received Power to be corrected, with Reference Signal Received Power after being corrected.
The step of by the correction, can further improve the certainty of measurement of RSRP.
With reference to Fig. 5, the schematic diagram of the embodiments of step S8 mono- in Fig. 4 is illustrated.Step S8 generally comprises following steps：
Step S81, compares the relative size of the interference signal receiving power and the Reference Signal Received Power;
Step S82, in the Reference Signal Received Power of the interference signal receiving power less than the first preset multiple
When, the Reference Signal Received Power is corrected, with Reference Signal Received Power after being corrected.
Specifically, first preset multiple can be 3 ~ 5 times, and rule of thumb first preset multiple can be adjusted
It is whole, so that the result measured in the measuring method of RSRP and actual communication process is closer to.
For example, first preset multiple can be 4 times.Correspondingly, if the interference signal receiving power be more than or
During the Reference Signal Received Power equal to 4 times, the interference signal being mixed into the interference for representing RSRP measurements is few, can not
It is corrected., whereas if during the Reference Signal Received Power of the interference signal receiving power less than 4 times, then it represents that
Part interference signal is mixed into reference signal, it is necessary to be corrected to the Reference Signal Received Power.
In the measurement of usual RSRP easily interference signal is mixed into reference signal.It is preferred that can in trimming process
It is removed with to the interference signal being mixed into.
With reference to Fig. 6, the schematic diagram of the embodiments of Fig. 5 steps S82 mono- is shown.Specifically, step S82 generally comprises following point
Step：
Step S821 is performed, if the interference signal receiving power connects more than the reference signal of the second preset multiple
Receive power and less than the Reference Signal Received Power of the first preset multiple, reference signal power is the ginseng after the correction
Examine the difference of signal reception power and 1/16th interference signal receiving power；
For example, the first preset multiple described herein is 4, second preset multiple is 2, if i.e. 2RSRPtmp1 ant＜
Npower1 ant＜ 4RSRPtmp1 ant, then reference signal power is RSRP after correctingtmp1 ant-1/16Npower1 ant。
Step S822 is performed, if the interference signal receiving power is more than the Reference Signal Received Power and less than the
The Reference Signal Received Power of two preset multiples, reference signal power is the Reference Signal Received Power after the correction
With the difference of interference signal receiving power described in 1/8th；
For example, second preset multiple is 2, if i.e. Npower1 ant＜ 2RSRPtmp1 ant, then reference signal after correcting
Power is RSRPtmp1 ant-1/8Npower1 ant。
Step S823, if interference signal receiving power is less than the Reference Signal Received Power, refers to after the correction
Signal power is the difference of the Reference Signal Received Power and interference signal receiving power described in a quarter.If for example,
Npower1 ant＜ RSRPtmp1 ant, then reference signal power is RSRP after correctingtmp1 ant-1/4Npower1 ant。
It should be noted that first preset multiple and the second preset multiple can rule of thumb be adjusted, reference
The ratio that signal reception power subtracts interference signal receiving power can also be configured based on experience, after making correction
Reference Signal Received Power is more accurate.
The present invention also provides a kind of method of gravity treatment, including：Reference signal reception is carried out to current area and adjacent cell
The measurement of power, the measuring method for being measured as above-mentioned Reference Signal Received Power of the Reference Signal Received Power, specifically
Ground, the measuring method of Reference Signal Received Power refers to the content of foregoing description, will not be repeated here；
When the Reference Signal Received Power for measuring adjacent cell is more than the Reference Signal Received Power of current area, cut
Adjacent cell is shifted to be resident.
The present invention also provides a kind of Reference Signal Received Power measurement apparatus, and the measurement apparatus can be arranged in UE,
It is connected with the antenna of UE, for processing the signal that antenna is received.With reference to Fig. 7, show that reference signal of the present invention is received
The schematic diagram of the embodiment of power-measuring device one.The Reference Signal Received Power measurement apparatus include：
Reference signal unit 100, is connected with the antenna, after the antenna receives signal, it is adaptable to from described
Reference signal and corresponding reference signal symbol are found out in signal.It should be noted that the reference signal unit 100 can be with
The antenna is joined directly together, it is also possible to be indirectly connected to, and should not limit the present invention with this.
Frequency-region signal unit 101, is connected with the reference signal unit 100, it is adaptable to obtain and reference signal unit 100
The corresponding frequency-region signal of the reference signal symbol found out；
Channel Elements 102, are connected, it is adaptable to be based on the frequency-region signal unit 101, the reference signal unit 100
The frequency-region signal that the frequency-region signal unit 101 is obtained, obtains the letter of the reference signal corresponding with the reference signal symbol
Road；Specifically, the Channel Elements 102 are obtained generally according to the frequency-region signal unit 101 frequency-region signal and the reference
The mould of the conjugate multiplication of the reference signal that signal element 100 is found out, obtains the channel, but the present invention is to Channel Elements 102
The mode for obtaining channel is not restricted.
Correlation factor unit 103, is connected with the Channel Elements 102, the reference signal unit 100, it is adaptable to according to
The channel that the Channel Elements 102 are obtained, with reference to the sub-carrier positions identical reference signal symbol that reference signal unit 100 is found out
Correlation between number corresponding reference signal, forms correlation factor；Specifically, the correlation factor unit 103, can basis
The channel of the sub-carrier positions identical reference signal symbol that Channel Elements 102 are obtained carries out conjugate multiplication, with conjugate multiplication reality
The absolute value in portion is used as correlation factor, but the present invention is not restricted to the mode that correlation factor unit 103 obtains correlation factor.
Reference Signal Received Power unit 104, is connected, it is adaptable to based on the correlation with the correlation factor unit 103
The correlation factor that factor unit is formed, obtains Reference Signal Received Power.The Reference Signal Received Power list under normal circumstances
Unit 104, it is adaptable to the average of the sum of the correlation factor formed according to the correlation factor unit 103, obtains the reference signal
Receiving power.
The reference signal unit 100, frequency-region signal unit 101, the correlation factor unit 103 of Channel Elements 102 and reference
The principle that signal reception power unit 104 cooperates, refers to the content of the measuring method first embodiment description of RSRP,
This is repeated no more.
With reference to Fig. 8, the schematic diagram of the embodiment of Reference Signal Received Power measurement apparatus two of the present invention is shown.The present embodiment
The part that is basically the same as those in the first embodiment is repeated no more, and the present embodiment is with the difference of first embodiment, described with reference to letter
Number receiving power measurement apparatus also include：
Uncorrelated factor unit 105, is connected with the Channel Elements 102, reference signal unit 100, it is adaptable to according to institute
The channel of the acquisition of Channel Elements 102 is stated, with reference to the sub-carrier positions identical reference signal symbol that reference signal unit 100 is found out
Irrelevance between corresponding reference signal and interference signal, forms the uncorrelated factor；The uncorrelated factor unit 105,
The channel of the sub-carrier positions identical reference signal symbol suitable for being obtained to Channel Elements 102 carries out conjugate multiplication, with altogether
The absolute value of the imaginary part that yoke is multiplied is used as the uncorrelated factor.
Interference signal receiving power unit 106, is connected, it is adaptable to based on uncorrelated to the uncorrelated factor unit 105
The uncorrelated factor that factor unit 105 is formed obtains interference signal receiving power.
The uncorrelated factor unit 105, the operation principle of interference signal receiving unit 106, refer to the measurement of RSRP
The content of method second embodiment description, will not be repeated here.
Please continue to refer to Fig. 8, it is preferable that Reference Signal Received Power measurement apparatus also include：
Correction unit 107, with the Reference Signal Received Power unit 104, the interference signal receiving power unit 106
It is connected, it is adaptable to Reference Signal Received Power, the interference signal reception obtained with reference to Reference Signal Received Power unit 104
Relativeness between the interference signal receiving power that power cell 106 is obtained, school is carried out to the Reference Signal Received Power
Just, with Reference Signal Received Power after being corrected.
The correction unit 107 can be by interference signal receiving power and the Reference Signal Received Power relative size
To judge whether to correction.
Specifically, the correction unit 107 includes：
Comparator 1071, is provided with the first preset multiple, with the Reference Signal Received Power unit 104, the interference
Signal reception power unit 106 is connected, it is adaptable to relatively more described interference signal receiving power and the Reference Signal Received Power
Relative size, in the Reference Signal Received Power of the interference signal receiving power less than the first preset multiple, forms
Trigger signal；
Adjuster 1072, is connected with the Reference Signal Received Power unit 104, the comparator 106, it is adaptable to
When receiving the trigger signal that the adjuster 1070 sends, the Reference Signal Received Power is corrected, to obtain school
Reference Signal Received Power after just.
The adjuster 1072, is provided with the first preset multiple and the second preset multiple, and second preset multiple is less than
First preset multiple, the adjuster 1072 is also connected with the interference signal receiving power unit 105；The comparator
1071 in the interference signal receiving power more than the Reference Signal Received Power of the second preset multiple and pre- less than first
If during the Reference Signal Received Power of multiple, sending the first trigger signal；The adjuster 1072 is receiving described
During one trigger signal, Reference Signal Received Power and 1/16th interference letter according to Reference Signal Received Power unit 104
The difference of number receiving power, obtains reference signal power after the correction；
The comparator 1071 can also the interference signal receiving power more than the Reference Signal Received Power and
Less than the second preset multiple the Reference Signal Received Power when, send the second trigger signal；The adjuster 1072 is applicable
In when second trigger signal is received, the interference signal according to the Reference Signal Received Power with 1/8th connects
The difference of power is received, reference signal power after the correction is obtained；
The comparator 1071 is applied to when the interference signal receiving power is less than the Reference Signal Received Power,
Send the 3rd trigger signal；The adjuster 1072 is applied to when three trigger signal is received, according to the reference
Signal power is the difference of the Reference Signal Received Power and interference signal receiving power described in a quarter, obtains the correction
Reference signal power afterwards.
Correspondingly, the present invention also provides a kind of user terminal (User Experience, UE), including：It is provided by the present invention
Reference signal power measurement apparatus.The specific technical scheme of the reference signal power measurement apparatus refer to foregoing teachings,
Will not be repeated here.
Specifically, the user terminal can make the mobile communication equipment of mobile phone etc..The measurement apparatus can be arranged at institute
In stating mobile phone.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this area
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and techniques content of the disclosure above to this hair
Bright technical scheme makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, according to the present invention
Any simple modification, equivalent variation and modification for being made to above example of technical spirit, belong to technical solution of the present invention
Protection domain.
Claims (19)
1. a kind of reference signal received power measurement method, it is characterised in that including：
Reference signal and corresponding reference signal symbol are found out from the signal for receiving；
The frequency-region signal corresponding with the reference signal symbol is obtained from the signal；
Based on the frequency-region signal, the channel of the reference signal corresponding with the reference signal symbol is obtained；
According to the channel, with reference to the correlation of the corresponding reference signal of sub-carrier positions identical reference signal symbol, formed
Correlation factor；
Reference Signal Received Power is obtained based on the correlation factor；Also include：
According to the channel, with reference to the corresponding reference signal of sub-carrier positions identical reference signal symbol and interference signal not
Correlation, forms the uncorrelated factor；
Interference signal receiving power is obtained based on the uncorrelated factor.
2. measuring method as claimed in claim 1, it is characterised in that also include：
With reference to the relation between the Reference Signal Received Power and interference signal receiving power, work(is received to the reference signal
Rate is corrected, with Reference Signal Received Power after being corrected.
3. measuring method as claimed in claim 2, it is characterised in that wrapped the step of Reference Signal Received Power after being corrected
Include：
Compare the relative size of the interference signal receiving power and the Reference Signal Received Power；
In the Reference Signal Received Power of the interference signal receiving power less than the first preset multiple, to the reference
Signal reception power is corrected, with Reference Signal Received Power after being corrected.
4. measuring method as claimed in claim 3, it is characterised in that be corrected to the Reference Signal Received Power, obtained
Include the step of Reference Signal Received Power after must correcting：
If the interference signal receiving power is more than the Reference Signal Received Power of the second preset multiple and less than first
The Reference Signal Received Power of preset multiple, after the correction reference signal power be the Reference Signal Received Power with
The difference of 1/16th interference signal receiving power；
If the interference signal receiving power is more than the Reference Signal Received Power and less than described in the second preset multiple
Reference Signal Received Power, reference signal power is to be done described in the Reference Signal Received Power and 1/8th after the correction
Disturb the difference of signal reception power；
If interference signal receiving power is less than the Reference Signal Received Power, reference signal power is described after the correction
The difference of Reference Signal Received Power and interference signal receiving power described in a quarter.
5. measuring method as claimed in claim 1, it is characterised in that described based on the frequency-region signal, obtain with reference to believing
The step of number symbol corresponding channel, includes：
Conjugate multiplication based on frequency-region signal with the reference signal, obtains the channel.
6. measuring method as claimed in claim 1, it is characterised in that according to the channel, with reference to sub-carrier positions identical
The step of reference signal correlation of reference signal symbol, formation correlation factor, includes：
The channel of sub-carrier position identical reference signal symbol carries out conjugate multiplication, is made with the absolute value of conjugate multiplication real part
It is correlation factor.
7. measuring method as claimed in claim 1, it is characterised in that according to the channel, with reference to sub-carrier positions identical
The step of reference signal of reference signal symbol and the being not related to property of interference signal, formation uncorrelated factor, includes：
The channel of sub-carrier position identical reference signal symbol carries out conjugate multiplication, with the absolute value of the imaginary part of conjugate multiplication
As the uncorrelated factor.
8. measuring method as claimed in claim 1, it is characterised in that described reference signal is obtained based on the correlation factor to connect
The step of receiving power includes：
The Reference Signal Received Power is obtained by the average of the sum of the correlation factor.
9. a kind of method of gravity treatment, it is characterised in that including：
The measurement of Reference Signal Received Power, the measurement of the Reference Signal Received Power are carried out to current area and adjacent cell
Reference signal received power measurement method described in any one claim of claim 1~8；
When the Reference Signal Received Power for measuring adjacent cell is more than the Reference Signal Received Power of current area, switch to
It is resident adjacent cell.
10. a kind of Reference Signal Received Power measurement apparatus, it is characterised in that including：
Reference signal unit, it is adaptable to find out reference signal and corresponding reference signal symbol；
The frequency-region signal unit being connected with the reference signal unit, it is adaptable to obtain the reference letter found out with reference signal unit
Number corresponding frequency-region signal of symbol；
The Channel Elements being connected with the frequency-region signal unit, the reference signal unit, it is adaptable to based on the frequency-region signal
The frequency-region signal that unit is obtained, obtains the channel of the reference signal corresponding with the reference signal symbol；
The correlation factor unit being connected with the Channel Elements, the reference signal unit, it is adaptable to according to the Channel Elements
The channel of acquisition, the corresponding reference signal of sub-carrier positions identical reference signal symbol found out with reference to reference signal unit it
Between correlation, formed correlation factor；
The Reference Signal Received Power unit being connected with the correlation factor unit, it is adaptable to based on the correlation factor unit shape
Into correlation factor, obtain Reference Signal Received Power；
Also include：
The uncorrelated factor unit connected to the Channel Elements, reference signal unit, it is adaptable to obtained according to the Channel Elements
Channel, the corresponding reference signal of sub-carrier positions identical reference signal symbol found out with reference to reference signal unit with it is dry
The irrelevance between signal is disturbed, the uncorrelated factor is formed；
The interference signal receiving power unit being connected to the uncorrelated factor unit, it is adaptable to obtained based on the uncorrelated factor
Obtain interference signal receiving power.
11. measurement apparatus as claimed in claim 10, it is characterised in that also include：
The correction unit being connected with the Reference Signal Received Power unit, the interference signal receiving power unit, it is adaptable to
What Reference Signal Received Power, the interference signal receiving power unit with reference to the acquisition of Reference Signal Received Power unit were obtained
Relativeness between interference signal receiving power, is corrected to the Reference Signal Received Power, joins with after being corrected
Examine signal reception power.
12. measurement apparatus as claimed in claim 11, it is characterised in that the correction unit includes：
The comparator being connected with the Reference Signal Received Power unit, the interference signal receiving power unit, it is adaptable to compare
The interference signal receiving power and the Reference Signal Received Power relative size are small in the interference signal receiving power
When the Reference Signal Received Power of the first preset multiple, trigger signal is formed；
The adjuster being connected with the Reference Signal Received Power unit, the comparator, it is adaptable to receiving the correction
During the trigger signal that device sends, the Reference Signal Received Power is corrected, work(is received with reference signal after being corrected
Rate.
13. measurement apparatus as claimed in claim 12, it is characterised in that the adjuster also receives work(with the interference signal
Rate unit is connected；
The comparator is applied to the reference signal reception more than the second preset multiple in the interference signal receiving power
When power and the Reference Signal Received Power less than the first preset multiple, the first trigger signal is sent；The adjuster is fitted
For when first trigger signal is received, being connect with 1/16th interference signal according to the Reference Signal Received Power
The difference of power is received, reference signal power after the correction is obtained；
The comparator is applied in the interference signal receiving power more than the Reference Signal Received Power and less than second
During the Reference Signal Received Power of preset multiple, the second trigger signal is sent；The adjuster is applied to receiving
When stating the second trigger signal, the difference of interference signal receiving power according to the Reference Signal Received Power and 1/8th,
Obtain reference signal power after the correction；
The comparator is applied to when the interference signal receiving power is less than the Reference Signal Received Power, sends the 3rd
Trigger signal；The adjuster is applied to when three trigger signal is received, and is institute according to the reference signal power
The difference of Reference Signal Received Power and interference signal receiving power described in a quarter is stated, reference signal work(after the correction is obtained
Rate.
14. measurement apparatus as claimed in claim 10, it is characterised in that the Channel Elements, it is adaptable to according to the frequency domain
The mould of the conjugate multiplication of the reference signal that the frequency-region signal that signal element is obtained is found out with the reference signal unit, obtains described
Channel.
15. measurement apparatus as claimed in claim 10, it is characterised in that the correlation factor unit, it is adaptable to channel list
The channel of the sub-carrier positions identical reference signal symbol that unit obtains carries out conjugate multiplication,
Using the absolute value of conjugate multiplication real part as correlation factor.
16. measurement apparatus as claimed in claim 10, it is characterised in that the uncorrelated factor unit, it is adaptable to channel
The channel of the sub-carrier positions identical reference signal symbol that unit is obtained carries out conjugate multiplication, with the exhausted of the imaginary part of conjugate multiplication
To being worth as the uncorrelated factor.
17. measurement apparatus as claimed in claim 10, it is characterised in that the Reference Signal Received Power unit, it is adaptable to
The average of the sum of the correlation factor formed according to the correlation factor unit, obtains the Reference Signal Received Power.
A kind of 18. user terminals, it is characterised in that including：Reference letter as described in any one claim of claim 10~17
The measurement apparatus of number power.
19. user terminals as claimed in claim 18, it is characterised in that the user terminal is mobile phone, the measurement apparatus are set
In the mobile phone.
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| 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 |
| 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 |
| 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 |
| CN110115082B (en) | 2017-01-05 | 2023-09-19 | 摩托罗拉移动有限责任公司 | Scheduling request indication |
| CN108632932B (en) * | 2018-06-21 | 2019-11-15 | 维沃移动通信有限公司 | The switching method and device of cell |
| 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 |
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| 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 |
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| JP2009065403A (en) * | 2007-09-06 | 2009-03-26 | Nec Corp | Method and device for estimating reception quality in radio communication |
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| 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 |
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