CN104254101B - A kind of adjacent area reference signal received power measurement method - Google Patents

A kind of adjacent area reference signal received power measurement method Download PDF

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CN104254101B
CN104254101B CN201310268330.4A CN201310268330A CN104254101B CN 104254101 B CN104254101 B CN 104254101B CN 201310268330 A CN201310268330 A CN 201310268330A CN 104254101 B CN104254101 B CN 104254101B
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mrow
prb
adjacent area
frequency
rsrp
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CN104254101A (en
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王丽
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Potevio Institute of Technology Co Ltd
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Potevio Institute of Technology Co Ltd
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Abstract

This application discloses a kind of adjacent area Reference Signal Received Power（RSRP）Measuring method, adjacent area RSRP measurement is carried out using common frequency synchronization frame, without synchronizing the switching between frequency and common frequency, therefore take relative to prior art relatively low, and adjacent area RSRP measurements and regular traffic can be carried out simultaneously；And measure that obtained Reference Signal Received Quality just represents business on common frequency is disturbed degree, advantageously in carrying out interference coordination.

Description

A kind of adjacent area reference signal received power measurement method
Technical field
The application is related to wireless communication technology field, more particularly to a kind of adjacent area reference signal received power measurement method.
Background technology
A kind of wireless communication system takes discontinuous spectral bandwidth, and its schematic diagram is as shown in Figure 1.Each frequency domain is The physical channel of 25kHz bandwidth is defined as a frequency, at mostIndividual frequency.Each frequency uses OFDM technology, all discontinuous frequencies condense together, and system does United Dispatching and distributes to user, and constituting this has carrier wave The communication system of polymerization property.
The wireless communication system a length of 25ms of radio frames corresponding on each frequency, includes 45 OFDM symbols. Frequency time interval resource structure is as shown in Fig. 2 downlink resource takes 13 OFDM symbols.
Multiple frequencies are divided into two kinds by the wireless communication system according to function, and one kind is synchronous frequency, and another kind is general Passband point.Synchronous frequency major function is to complete synchronization and transmission broadcast message, including descending synchronous signal channel, broadcast Channel and RACH.
As shown in figure 3, in synchronous frequency, synchronizing signal（PSS/SSS）And broadcast channel（PBCH）Using radio frames to be single Position is alternately transmitted on downlink resource, and specifically, PSS/SSS is sent in the radio frames that radio frame number mould 2 is 0, PBCH is sent in the radio frames that frame number mould 2 is 1.Fig. 4 is the synchronous subband broadcast frame structural representation of the wireless communication system.
The wireless communication system according to synchronizing band point search adjacent area, and enters when carrying out interference coordination to searching adjacent area Row RSRP is measured, and RSRP measurements are carried out in synchronous frequency broadcast frame, and interference coordination is carried out according to RSRP measurement results.
For single-frequency point user, when carrying out adjacent area RSRP measurements, it is necessary first to synchronous frequency is switched to, according to synchronizing band Point search adjacent area, and carry out adjacent area RSRP measurements.The shortcomings that this method is that time-consuming for this measuring method, and adjacent area RSRP is surveyed Amount and business can not be carried out simultaneously.When co-channel interference be present in this communication system, the Reference Signal Received Quality of synchronous frequency The degree that is disturbed of business on common frequency can not be represented, therefore, it is necessary to improves the method for adjacent area RSRP measurements.
The content of the invention
This application provides a kind of adjacent area RSRP measuring methods, it is possible to increase the real-time of adjacent area RSRP measurements and accurate Property, so as to effectively carry out interference coordination.
A kind of adjacent area RSRP measuring methods that the embodiment of the present application provides, including：
A, the time of user equipment (UE) judging distance last time adjacent area RSRP measurements reaches the first predetermined space, if so, holding Row step B；
B, UE is according to the cell ID of adjacent areaWith the absolute frequency call number n of common frequencyPRB, obtain neighbor synchronization Position (k, l, the n of signalPRB), according to time domain reception antenna data corresponding to the position acquisition of neighbor synchronization signal, by quick Fourier transformation FFT is transformed into frequency domain, obtains frequency domain antenna data Y (k, l, the n of neighbor synchronization signalPRB)；Wherein, k represents frequency Domain sub-carrier positions, l represent time-domain position, nPRBRepresent frequency index position；
C, UE is according to the cell ID of adjacent areaWith the absolute frequency call number n of common frequencyPRB, generate local adjacent area Synchronous frequency-region signal S (k, l, nPRB)；
D, UE is according to local neighbor synchronization frequency-region signal S (k, l, nPRB) and neighbor synchronization signal frequency domain antenna data Y (k,l,nPRB), obtain channels of neighboring areas estimation
E, UE is according to channels of neighboring areas estimate H (k, l, nPRB), determine bias when compensating for frequency offset value and compensation；According to compensation Bias when frequency deviation value and compensation, frequency deviation compensation and partial compensation for the time are carried out to the channel estimation of neighbor synchronization signal location, mended Channels of neighboring areas estimate H'(k, l, n after repayingPRB)；
F, UE is by channels of neighboring areas the estimate H'(k, l, n after compensationPRB) denoising Processing is carried out, obtain the adjacent area of present frame RSRP values.
It is preferred that further comprise after step F：UE is smoothed to adjacent area RSRP measured value, i.e. adjacent area RSRP=previous frame adjacent area RSRP values × (1-alpha)+present frame RSRP values × alpha；Wherein alpha is smoothing factor, 0 ＜ alpha≤1。
It is preferred that further comprise before step A：After the completion of cell searching, UE is matched somebody with somebody by detecting the measurement that base station is sent Message is put, obtains the cell ID of adjacent area.
It is preferred that first predetermined space is the integral multiple of 40 radio frames or 40 radio frames.
It is preferred that in step C, local neighbor synchronization frequency-region signal S (k, l, n are generated according to equation belowPRB)：
Wherein, nPRBFor frequency index value, span 0,1 ...,
C (n) is pseudo-random sequence, and c (n) generating mode is：
C (n)=(x1(n+NC)+x2(n+NC))mod2
x1(n+31)=(x1(n+3)+x1(n))mod2
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2
Wherein NC=1600, first m-sequence initialization of register is x1(0)=1, x1(n)=0, n=1,2 ..., 30, Second m-sequence initialization of register becinitInitial value is：
WhereinRepresent neighbor synchronization in a synchronization frame OFDM symbol index shared by signal.
It is preferred that further comprise after step F：
Whether the time that the last measurement of UE judging distances reports reaches predetermined space, if so, UE is by the RSRP values of adjacent area Offer base station.
As can be seen from the above technical solutions, adjacent area RSRP measurement is carried out using common frequency synchronization frame, without carrying out Switching between synchronous frequency and common frequency, therefore take relative to prior art relatively low, and adjacent area can be carried out simultaneously RSRP is measured and regular traffic；And measure obtained Reference Signal Received Quality just represent business on common frequency by dry Degree is disturbed, advantageously in progress interference coordination.
Brief description of the drawings
Fig. 1 is that a kind of wireless communication system takes discontinuous spectral bandwidth schematic diagram；
Fig. 2 is a kind of frequency time interval resource structural representation of wireless communication system；
Fig. 3 is a kind of frame structure schematic diagram of the synchronous subband of wireless communication system；
Fig. 4 is a kind of synchronous subband broadcast frame structural representation of wireless communication system；
Fig. 5 is the adjacent area RSRP measuring method flow charts that the embodiment of the present application provides.
Embodiment
Present applicant proposes a kind of improved adjacent area RSRP measuring methods, its fundamental design idea is：Utilize common frequency Synchronization frame carries out adjacent area RSRP measurement.
To make the technical principle of technical scheme, feature and technique effect clearer, below in conjunction with specific reality Example is applied technical scheme is described in detail.
Common frequency is mainly used in transmission and carrier synchronization and the time synchronized of up-downgoing business.A kind of wireless communication system Common frequency radio frame number mould 40 equal to 0 radio frames on send a synchronizing signal, the frame is referred to as synchronization frame, for protecting Card UE carries out normal carrier synchronization and time synchronized on common frequency.Synchronization frame on common frequency is in the different districts time-division Send synchronizing signal.
The adjacent area RSRP measuring methods flow that the embodiment of the present application provides is as shown in figure 5, comprise the following steps：
Step 501：After the completion of cell searching, user equipment（UE) by detecting base station（eNodeB）The measurement configuration of transmission Message, obtain the cell ID of adjacent area.
Step 502：The time of judging distance last time adjacent area RSRP measurements reaches the first predetermined space, if so, performing step Rapid 503.In the embodiment of the present application, first predetermined space is the integral multiple of 40 radio frames or 40 radio frames.
Step 503：According to the cell ID of adjacent areaWith the absolute frequency call number n of common frequencyPRB, obtain adjacent area Position (k, l, the n of synchronizing signalPRB), according to time domain reception antenna data corresponding to the position acquisition of neighbor synchronization signal, pass through Fast Fourier Transform (FFT) FFT is transformed into frequency domain, obtains frequency domain antenna data Y (k, l, the n of neighbor synchronization signalPRB)。
Wherein, k represents subcarrier in frequency domain position, and l represents time-domain position, nPRBRepresent frequency index position.
In the embodiment of the present application, k, l, nPRBWithActual value it is as follows：
nPRB=0,1 ..., 479；
Above value is given for example only, not limiting application scheme.
Step 504：According to the cell ID of adjacent areaWith the absolute frequency call number n of common frequencyPRBGeneration is local adjacent Area's synchronization frequency-region signal S (k, l, nPRB)。
The embodiment of the present application provides a kind of generation local neighbor synchronization frequency-region signal S (k, l, nPRB) formula：
Wherein, nPRBFor frequency index value, span 0,1 ...,
C (n) is pseudo-random sequence, and c (n) generating mode is：
C (n)=(x1(n+NC)+x2(n+NC))mod2
x1(n+31)=(x1(n+3)+x1(n))mod2
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2
Wherein NC=1600, first m-sequence initialization of register is x1(0)=1, x1(n)=0, n=1,2 ..., 30, Second m-sequence initialization of register becinitInitial value is：
WhereinNeighbor synchronization in a synchronization frame is represented to believe OFDM symbol index shared by number.
Above formula is given for example only, and not forming scope to technical scheme limits.
Step 505：According to local neighbor synchronization frequency-region signal S (k, l, nPRB) and neighbor synchronization signal frequency domain antenna number According to Y (k, l, nPRB), obtain channels of neighboring areas estimation
Step 506：According to channels of neighboring areas estimate H (k, l, nPRB), determine bias when compensating for frequency offset value and compensation.
Step 507：According to bias when compensating for frequency offset value and compensation, line frequency is entered to the channel estimation of neighbor synchronization signal location Offset compensation and partial compensation for the time, channels of neighboring areas estimate H'(k, l, n after being compensatedPRB)。
Step 508：By channels of neighboring areas the estimate H'(k, l, n after compensationPRB) denoising Processing is carried out, obtain present frame Adjacent area RSRP values.
Step 509：UE is smoothed to adjacent area RSRP measured value.That is adjacent area RSRP=previous frame adjacent area RSRP values × (1-alpha)+present frame RSRP × alpha.Wherein alpha is smoothing factor, 0 ＜ alpha≤1.
Step 510：Whether the time that the last measurement of judging distance reports reaches the second predetermined space, if so, performing step Rapid 511.In the embodiment of the present application, second predetermined space is determined by high level.
Step 511：Adjacent area RSRP values are reported base station by UE.
The foregoing is only the preferred embodiment of the application, not to limit the protection domain of the application, it is all Within the spirit and principle of technical scheme, any modification, equivalent substitution and improvements done etc., this Shen should be included in Within the scope of please protecting.

Claims (6)

  1. A kind of 1. adjacent area Reference Signal Received Power RSRP measuring methods, it is characterised in that including：
    A, the time of user equipment (UE) judging distance last time adjacent area RSRP measurements reaches the first predetermined space, if so, performing step Rapid B；
    B, UE is according to the cell ID of adjacent areaWith the absolute frequency call number n of common frequencyPRB, obtain neighbor synchronization signal Position (k, l, nPRB), according to time domain reception antenna data corresponding to the position acquisition of neighbor synchronization signal, pass through fast Fourier Conversion FFT is transformed into frequency domain, obtains frequency domain antenna data Y (k, l, the n of neighbor synchronization signalPRB)；Wherein, k represents that frequency domain carries Ripple position, l represent time-domain position, nPRBFor representing frequency index position；
    C, UE is according to the cell ID of adjacent areaWith the absolute frequency call number n of common frequencyPRB, generate local neighbor synchronization frequency Domain signal S (k, l, nPRB)；
    D, UE is according to local neighbor synchronization frequency-region signal S (k, l, nPRB) and neighbor synchronization signal frequency domain antenna data Y (k, l, nPRB), obtain channels of neighboring areas estimation
    E, UE is according to channels of neighboring areas estimate H (k, l, nPRB), determine bias when compensating for frequency offset value and compensation；According to compensating for frequency offset Bias when value and compensation, frequency deviation compensation and partial compensation for the time are carried out to the channel estimation of neighbor synchronization signal location, after being compensated Channels of neighboring areas estimate H'(k, l, nPRB)；
    F, UE is by channels of neighboring areas the estimate H'(k, l, n after compensationPRB) denoising Processing is carried out, obtain the adjacent area RSRP of present frame Value.
  2. 2. according to the method for claim 1, it is characterised in that further comprise after step F：Surveys of the UE to adjacent area RSRP Value is smoothed, i.e. adjacent area RSRP=previous frames adjacent area RSRP values × (1-alpha)+present frame RSRP values × alpha； Wherein alpha is smoothing factor, 0<alpha≤1.
  3. 3. according to the method for claim 1, it is characterised in that further comprise before step A：After the completion of cell searching, UE configures message by detecting the measurement that base station is sent, and obtains the cell ID of adjacent area.
  4. 4. according to the method for claim 1, it is characterised in that first predetermined space is 40 radio frames or 40 nothings The integral multiple of line frame.
  5. 5. according to the method for claim 1, it is characterised in that in step C, local neighbor synchronization is generated according to equation below Frequency-region signal S (k, l, nPRB)：
    <mrow> <mi>S</mi> <mrow> <mo>(</mo> <mi>k</mi> <mo>,</mo> <mi>l</mi> <mo>,</mo> <msub> <mi>n</mi> <mrow> <mi>P</mi> <mi>R</mi> <mi>B</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>=</mo> <mfrac> <mn>1</mn> <msqrt> <mn>2</mn> </msqrt> </mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mn>2</mn> <mo>&amp;CenterDot;</mo> <mi>c</mi> <mo>(</mo> <mrow> <mn>2</mn> <mo>&amp;times;</mo> <mrow> <mo>(</mo> <mrow> <mn>10</mn> <mo>&amp;times;</mo> <msub> <mi>n</mi> <mrow> <mi>P</mi> <mi>R</mi> <mi>B</mi> </mrow> </msub> <mo>+</mo> <mi>k</mi> </mrow> <mo>)</mo> </mrow> </mrow> <mo>)</mo> <mo>)</mo> </mrow> <mo>+</mo> <mi>j</mi> <mfrac> <mn>1</mn> <msqrt> <mn>2</mn> </msqrt> </mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mn>2</mn> <mo>&amp;CenterDot;</mo> <mi>c</mi> <mo>(</mo> <mrow> <mn>2</mn> <mo>&amp;times;</mo> <mrow> <mo>(</mo> <mrow> <mn>10</mn> <mo>&amp;times;</mo> <msub> <mi>n</mi> <mrow> <mi>P</mi> <mi>R</mi> <mi>B</mi> </mrow> </msub> <mo>+</mo> <mi>k</mi> </mrow> <mo>)</mo> </mrow> <mo>+</mo> <mn>1</mn> </mrow> <mo>)</mo> <mo>)</mo> </mrow> <mo>;</mo> </mrow>
    Wherein, nPRBFor the absolute frequency call number of common frequency, span
    C (n) is pseudo-random sequence, wherein, n is used to represent 2 × (10 × nPRB+ k), c (n) generating mode is：
    C (n)=(x1(n+NC)+x2(n+NC))mod2
    x1(n+31)=(x1(n+3)+x1(n))mod2
    x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2
    Wherein NC=1600, first m-sequence initialization of register is x1(0)=1, x1(n)=0, n=1,2 ..., 30, second Individual m-sequence initialization of register iscinitInitial value is：
    <mrow> <msub> <mi>c</mi> <mrow> <mi>i</mi> <mi>n</mi> <mi>i</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <msup> <mn>2</mn> <mn>10</mn> </msup> <mo>&amp;CenterDot;</mo> <mrow> <mo>(</mo> <mi>l</mi> <mo>+</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>&amp;CenterDot;</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>&amp;CenterDot;</mo> <msubsup> <mi>N</mi> <mrow> <mi>I</mi> <mi>D</mi> </mrow> <mrow> <mi>c</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> </mrow> </msubsup> <mo>+</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>+</mo> <mn>2</mn> <mo>&amp;CenterDot;</mo> <msubsup> <mi>N</mi> <mrow> <mi>I</mi> <mi>D</mi> </mrow> <mrow> <mi>c</mi> <mi>e</mi> <mi>l</mi> <mi>l</mi> </mrow> </msubsup> <mo>;</mo> </mrow>
    WhereinRepresent neighbor synchronization signal institute in a synchronization frame The OFDM symbol index accounted for.
  6. 6. according to the method described in any one of claim 1 to 5, it is characterised in that further comprise after step F：
    Whether the time that the last measurement of UE judging distances reports reaches predetermined space, if so, UE reports adjacent area RSRP values Base station.
CN201310268330.4A 2013-06-28 2013-06-28 A kind of adjacent area reference signal received power measurement method Expired - Fee Related CN104254101B (en)

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CN106533820B (en) * 2015-09-14 2019-11-05 展讯通信（上海）有限公司 The method, apparatus and user equipment of cell measurement
CN108449769B (en) * 2018-03-26 2021-06-04 北京小米松果电子有限公司 Method, device and terminal for measuring adjacent regions and storage medium

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CN102892139A (en) * 2011-07-21 2013-01-23 普天信息技术研究院有限公司 Method for measuring neighbourhood of multi-channel wireless communication system
CN103067959A (en) * 2011-10-20 2013-04-24 联芯科技有限公司 Method of measuring adjacent region and user terminal

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CN102271354A (en) * 2010-06-02 2011-12-07 中兴通讯股份有限公司 Link adaptation method for long term evolution (LTE) system, base station and terminal
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CN103067959A (en) * 2011-10-20 2013-04-24 联芯科技有限公司 Method of measuring adjacent region and user terminal

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