CN110290572A - The method and corresponding system of cell fast search are realized in LTE system - Google Patents
The method and corresponding system of cell fast search are realized in LTE system Download PDFInfo
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Abstract
The present invention relates to a kind of methods that cell fast search is realized in LTE system, comprising the following steps: carries out spectrum measurement to LTE frequency range；It analyzes and extracts the envelope block in frequency spectrum data；LTE cell demodulation is successively carried out from centre to both ends to each spectrum envelope block.The invention further relates to a kind of systems realized and carry out fast search to the cell in LTE system.Using the method and corresponding system for realizing cell fast search in LTE system of the invention, by first carrying out spectrum measurement to LTE frequency range, then it analyzes and extracts the envelope block in frequency spectrum data, the method of LTE cell demodulation is finally successively carried out from centre to both ends to each spectrum envelope block, LTE system full frequency band can be greatly reduced, and from first to last the time-consuming of channel progress cell demodulation, great promotion LTE system search for the whole efficiency of cell one by one.
Description
Technical field
The present invention relates to mobile communication technology field more particularly to LTE system fast search field, in particular to one kind
The method and corresponding system of cell fast search are realized in LTE system.
Background technique
LTE is the long term evolution for the UMTS technical standard organized to set up by 3GPP, in December, 2004 in the Toronto 3GPP
It formally sets up the project and starts in meeting.LTE system introduces the key technologies such as OFDM and MIMO, significantly increases spectrum efficiency sum number
According to transmission rate, and various bandwidth is supported to distribute: 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz etc., and support complete
Ball mainstream 2G/3G frequency range and some newly-increased frequency ranges, thus frequency spectrum distribution is more flexible, power system capacity and covering are also obviously improved.
It is divided into FDD-LTE and TDD-LTE according to duplex mode difference LTE system, the main distinction of the two technology is the object eated dishes without rice or wine
It manages on layer.FDD system eats dishes without rice or wine uplink and downlink using pairs of UHF band reception and transmission data, and TDD system uplink and downlink then uses phase
Same frequency range is transmitted on different time slots, and compared with FDD duplex mode, TDD has the higher availability of frequency spectrum.
The RB number of LTE different band width configurations, distribution is different, and 20MHz can at most distribute 100 RB, peak rate
150M/s can be reached, under theoretical case, bandwidth is bigger, and capacity is bigger.The LTE band width configuration that Domestic Carriers use mainly includes
20MHz, 15MHz, 5MHz.For all LTE frequency ranges, channel grid spacing is 100KHz, it means that in carrier wave
Frequency of heart is necessary for the integral multiple of 100KHz.01 downlink frequency bands initial frequency of E-UTRA is 2110MHz, terminates frequency and is
2170MHz, frequency range span amount to 60MHz, contain 600 channels.Conventional small region search method, it is from first to last right to need
600 channels carry out trial demodulation one by one, and entire demodulating process is very time-consuming.And if all LTE downlinks used the country
Link frequency range, including E-UTRA 01, E-UTRA 03, E-UTRA 05, E-UTRA 39, E-UTRA 40, E-UTRA
41, six frequency ranges carry out cell searching simultaneously, then it is generally necessary to which a few minutes or even dozens of minutes could complete a wheel cell searching
Process.
Summary of the invention
The purpose of the present invention is overcoming the above-mentioned prior art, provides and a kind of meet that high-efficient, the used time is few, suitable
With the method and corresponding system for realizing cell fast search in LTE system in extensive range.
To achieve the goals above, the method and corresponding system of cell fast search are realized in LTE system of the invention
It is as follows:
The method that cell fast search is realized in the LTE system, is mainly characterized by, the method includes following step
It is rapid:
(1) spectrum measurement is carried out to LTE frequency range；
(2) it analyzes and extracts the envelope block in frequency spectrum data；
(3) LTE cell demodulation is successively carried out from centre to both ends to each spectrum envelope block.
Preferably, the resolution bandwidth RBW of spectrum measurement should be set as 100KHz in the step (1).
Preferably, the step (1) multiple LTE frequency ranges if it exists, then merges and unified carry out spectrum measurement.
Preferably, the step (2) specifically includes the following steps:
(2.1) the envelope block in analysis spectrum data；
(2.2) the envelope block information in frequency spectrum data is extracted.
Preferably, in the step (2.2) envelope block information include envelope block data and each envelope block
Start-stop frequency.
Preferably, the step (3) specifically includes the following steps:
(3.1) judge whether that there are also the envelope blocks not demodulated, if it is, continuing step (3.2)；Otherwise, continue to walk
Suddenly (3.10)；
(3.2) next envelope block to be demodulated is obtained；
(3.3) according to the centre frequency of the start-stop frequency calculation block of envelope block；
(3.4) judge whether the frequency can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise, after
Continuous step (3.5)；
(3.5) using 100KHz as spacing, the frequency of left and right sides adjacent channel is calculated；
(3.6) the edge frequency threshold range of envelope block is seen if fall out, if it is, continuing step (3.1)；It is no
Then, continue step (3.7)；
(3.7) judge whether the adjacent frequency in left side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.8)；
(3.8) judge whether the adjacent frequency in right side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.5)；
(3.9) the LTE cell information for demodulating the frequency then proceedes to step (3.1)；
(3.10) summarize the LTE cell information of all envelope blocks.
Preferably, the centre frequency calculated in the step (3.3) is accurate to 100KHz.
Preferably, the edge frequency threshold range of envelope block uses the frequency of envelope block in the step (3.6)
The 20% of range carries out dynamic adjustment according to the frequency range size of envelope block.
Preferably, the step (3.6) specifically includes the following steps:
Judge whether the frequency difference of left and right sides adjacent channel exceeds the edge frequency threshold range of envelope block, if
It is then to continue step (3.1)；Otherwise, continue step (3.7).
Preferably, LTE cell information may include EARFCN, PCI, PSS, SSS and RS in the step (3.9).
This realizes the system for carrying out fast search to the cell in LTE system based on above system, is mainly characterized by, institute
The system stated includes:
Spectrum measurement unit, for carrying out spectrum measurement to LTE frequency range；
Spectrum envelope component analysis unit is connected, for analyzing and extracting spectrum number with the spectrum measurement unit
Envelope block in；
LTE cell demodulating unit is connected with the spectrum envelope component analysis unit, for each spectrum envelope area
Block successively carries out LTE cell demodulation from centre to both ends；
Search program, the search program carries out spectrum measurement to LTE frequency range, then analyzes and extract in frequency spectrum data
Envelope block finally successively carries out LTE cell demodulation from centre to both ends to each spectrum envelope block, specifically follows the steps below
Processing:
(1) spectrum measurement is carried out to LTE frequency range；
(2) it analyzes and extracts the envelope block in frequency spectrum data；
(3) LTE cell demodulation is successively carried out from centre to both ends to each spectrum envelope block.
Preferably, the resolution bandwidth RBW of spectrum measurement should be set as 100KHz in the step (1).
Preferably, the step (1) multiple LTE frequency ranges if it exists, then merges and unified carry out spectrum measurement.
Preferably, the step (2) specifically includes the following steps:
(2.1) the envelope block in analysis spectrum data；
(2.2) the envelope block information in frequency spectrum data is extracted.
Preferably, in the step (2.2) envelope block information include envelope block data and each envelope block
Start-stop frequency.
Preferably, the step (3) specifically includes the following steps:
(3.1) judge whether that there are also the envelope blocks not demodulated, if it is, continuing step (3.2)；Otherwise, continue to walk
Suddenly (3.10)；
(3.2) next envelope block to be demodulated is obtained；
(3.3) according to the centre frequency of the start-stop frequency calculation block of envelope block；
(3.4) judge whether the frequency can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise, after
Continuous step (3.5)；
(3.5) using 100KHz as spacing, the frequency of left and right sides adjacent channel is calculated；
(3.6) the edge frequency threshold range of envelope block is seen if fall out, if it is, continuing step (3.1)；It is no
Then, continue step (3.7)；
(3.7) judge whether the adjacent frequency in left side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.8)；
(3.8) judge whether the adjacent frequency in right side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.5)；
(3.9) the LTE cell information for demodulating the frequency then proceedes to step (3.1)；
(3.10) summarize the LTE cell information of all envelope blocks.
Preferably, the centre frequency calculated in the step (3.3) is accurate to 100KHz.
Preferably, the edge frequency threshold range of envelope block uses the frequency of envelope block in the step (3.6)
The 20% of range carries out dynamic adjustment according to the frequency range size of envelope block.
Preferably, the step (3.6) specifically includes the following steps:
Judge whether the frequency difference of left and right sides adjacent channel exceeds the edge frequency threshold range of envelope block, if
It is then to continue step (3.1)；Otherwise, continue step (3.7).
Preferably, LTE cell information may include EARFCN, PCI, PSS, SSS and RS in the step (3.9).
Using the method and corresponding system for realizing cell fast search in LTE system of the invention, by first to LTE
Frequency range carries out spectrum measurement, then analyzes and extracts the envelope block in frequency spectrum data, therefrom to each spectrum envelope block finally
Between the method for LTE cell demodulation is successively carried out to both ends, LTE system full frequency band from first to last channel one by one can be greatly reduced
The time-consuming of cell demodulation is carried out, the whole efficiency of LTE system search cell is greatly promoted.
Detailed description of the invention
Fig. 1 is the flow diagram that the method for cell fast search is realized in LTE system of the invention.
Fig. 2 is the cell schematics for the system that realization of the invention carries out fast search to the cell in LTE system.
Fig. 3 is 01 frequency of LTE downlink E-UTRA for the method that cell fast search is realized in LTE system of the invention
Section 2-d spectrum schematic diagram.
Fig. 4 is 01 frequency of LTE downlink E-UTRA for the method that cell fast search is realized in LTE system of the invention
Section LTE system and WCDMA system cell demodulation result schematic diagram.
Specific embodiment
It is further to carry out combined with specific embodiments below in order to more clearly describe technology contents of the invention
Description.
The method that cell fast search is realized in the LTE system of the invention, including following steps:
(1) spectrum measurement is carried out to LTE frequency range；
(2) it analyzes and extracts the envelope block in frequency spectrum data；
(2.1) the envelope block in analysis spectrum data；
(2.2) the envelope block information in frequency spectrum data is extracted；
(3) LTE cell demodulation is successively carried out from centre to both ends to each spectrum envelope block；
(3.1) judge whether that there are also the envelope blocks not demodulated, if it is, continuing step (3.2)；Otherwise, continue to walk
Suddenly (3.10)；
(3.2) next envelope block to be demodulated is obtained；
(3.3) according to the centre frequency of the start-stop frequency calculation block of envelope block；
(3.4) judge whether the frequency can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise, after
Continuous step (3.5)；
(3.5) using 100KHz as spacing, the frequency of left and right sides adjacent channel is calculated；
(3.6) the edge frequency threshold range of envelope block is seen if fall out, if it is, continuing step (3.1)；It is no
Then, continue step (3.7)；
(3.7) judge whether the adjacent frequency in left side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.8)；
(3.8) judge whether the adjacent frequency in right side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.5)；
(3.9) the LTE cell information for demodulating the frequency then proceedes to step (3.1)；
(3.10) summarize the LTE cell information of all envelope blocks.
As the preferred embodiment of the present invention, the resolution bandwidth RBW of spectrum measurement should be arranged in the step (1)
For 100KHz.
As the preferred embodiment of the present invention, the step (1) multiple LTE frequency ranges if it exists, then merge it is unified into
Line frequency spectrometry.
As the preferred embodiment of the present invention, envelope block information includes envelope block in the step (2.2)
The start-stop frequency of data and each envelope block.
As the preferred embodiment of the present invention, the centre frequency calculated in the step (3.3) is accurate to 100KHz.
As the preferred embodiment of the present invention, the edge frequency threshold range of envelope block in the step (3.6)
Using the 20% of the frequency range of envelope block, dynamic adjustment is carried out according to the frequency range size of envelope block.
As the preferred embodiment of the present invention, the step (3.6) specifically includes the following steps:
Judge whether the frequency difference of left and right sides adjacent channel exceeds the edge frequency threshold range of envelope block, if
It is then to continue step (3.1)；Otherwise, continue step (3.7).
As the preferred embodiment of the present invention, in the step (3.9) LTE cell information may include EARFCN,
PCI, PSS, SSS and RS.
This realizes the system for carrying out fast search to the cell in LTE system based on above system, including:
Spectrum measurement unit, for carrying out spectrum measurement to LTE frequency range；
Spectrum envelope component analysis unit is connected, for analyzing and extracting spectrum number with the spectrum measurement unit
Envelope block in；
LTE cell demodulating unit is connected with the spectrum envelope component analysis unit, for each spectrum envelope area
Block successively carries out LTE cell demodulation from centre to both ends；
Search program, the search program carries out spectrum measurement to LTE frequency range, then analyzes and extract in frequency spectrum data
Envelope block finally successively carries out LTE cell demodulation from centre to both ends to each spectrum envelope block, specifically follows the steps below
Processing:
(1) spectrum measurement is carried out to LTE frequency range；
(2) it analyzes and extracts the envelope block in frequency spectrum data；
(2.1) the envelope block in analysis spectrum data；
(2.2) the envelope block information in frequency spectrum data is extracted；
(3) LTE cell demodulation is successively carried out from centre to both ends to each spectrum envelope block；
(3.1) judge whether that there are also the envelope blocks not demodulated, if it is, continuing step (3.2)；Otherwise, continue to walk
Suddenly (3.10)；
(3.2) next envelope block to be demodulated is obtained；
(3.3) according to the centre frequency of the start-stop frequency calculation block of envelope block；
(3.4) judge whether the frequency can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise, after
Continuous step (3.5)；
(3.5) using 100KHz as spacing, the frequency of left and right sides adjacent channel is calculated；
(3.6) the edge frequency threshold range of envelope block is seen if fall out, if it is, continuing step (3.1)；It is no
Then, continue step (3.7)；
(3.7) judge whether the adjacent frequency in left side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.8)；
(3.8) judge whether the adjacent frequency in right side can correctly demodulate LTE cell, if it is, continuing step (3.9)；
Otherwise, continue step (3.5)；
(3.9) the LTE cell information for demodulating the frequency then proceedes to step (3.1)；
(3.10) summarize the LTE cell information of all envelope blocks.
As the preferred embodiment of the present invention, the resolution bandwidth RBW of spectrum measurement should be arranged in the step (1)
For 100KHz.
As the preferred embodiment of the present invention, the step (1) multiple LTE frequency ranges if it exists, then merge it is unified into
Line frequency spectrometry.
As the preferred embodiment of the present invention, envelope block information includes envelope block in the step (2.2)
The start-stop frequency of data and each envelope block.
As the preferred embodiment of the present invention, the centre frequency calculated in the step (3.3) is accurate to 100KHz.
As the preferred embodiment of the present invention, the edge frequency threshold range of envelope block in the step (3.6)
Using the 20% of the frequency range of envelope block, dynamic adjustment is carried out according to the frequency range size of envelope block.
As the preferred embodiment of the present invention, the step (3.6) specifically includes the following steps:
Judge whether the frequency difference of left and right sides adjacent channel exceeds the edge frequency threshold range of envelope block, if
It is then to continue step (3.1)；Otherwise, continue step (3.7).
As the preferred embodiment of the present invention, in the step (3.9) LTE cell information may include EARFCN,
PCI, PSS, SSS and RS.
It is specific implementation with 01 frequency band search cell of LTE downlink E-UTRA in a specific embodiment of the invention
Example, a kind of method of LTE system fast searching communities, including following steps:
(1) RBW is used to carry out spectrum measurement to 01 frequency range of LTE downlink E-UTRA for the resolution ratio of 100KHz；
(2) the envelope block in 01 frequency range frequency spectrum data of LTE downlink E-UTRA is analyzed.As shown in figure 3, there is signal
Envelope block include B1, B2, B3, B4, B5；
(3) the envelope block information in 01 frequency range frequency spectrum data of LTE downlink E-UTRA is extracted.Amount to 5 envelopes
Block, wherein B1 block [2110.0-2130.0MHz], B2 block [2130.0-2135.0MHz], B3 block [2135.0-
2140.1MHz], B4 block [2140.1-2145.0MHz], B5 block [2145.0-2164.6MHz]；
(4) demodulation of LTE cell is carried out to B1 block；
(4.1) using 100KHz as minimum unit, according to the centre frequency of the start-stop frequency calculation block of B1 block；
Centre frequency=2110.0+ (2130.0-2110.0) ÷ 2=2120.0 (MHz) of B1 block；
(4.2) it attempts to carry out the demodulation of LTE cell to the centre frequency 2120.0MHz of B1 block, cell can be demodulated；
(4.3) demodulation of LTE cell is carried out to the 2120.0MHz of B1 block, it is small obtains EARFCN, PCI, PSS, SSS, RS etc.
Area's information；
(5) demodulation of LTE cell is carried out to B2 block；
(5.1) using 100KHz as minimum unit, according to the centre frequency of the start-stop frequency calculation block of B2 block；
Centre frequency=2130.0+ (2135.0-2130.0) ÷ 2=2132.5 (MHz) of B2 block；
(5.2) it attempts to carry out the demodulation of LTE cell to the centre frequency 2132.5MHz of B2 block, cell cannot be demodulated；
(5.3) the edge frequency threshold range of B2 block is calculated；
The edge frequency threshold range of B2 block=(2135.0-2130.0) × 20%=1.0 (MHz)；
(5.4) using 100KHz as spacing, the frequency of adjacent channel at left and right sides of centre frequency is calculated；
Left side frequency=2132.5-0.1=2132.4 (MHz)；
Right side frequency=2132.5+0.1=2132.6 (MHz)；
(5.5) judge the frequency range of left and right sides adjacent channel whether in edge frequency threshold range；
Frequency range=2132.6-2132.4=0.2 (MHz) of left and right sides adjacent channel；
0.2 (MHz) < 1.0 (MHz), without departing from edge frequency threshold range
(5.6) it attempts frequency 2132.4MHz adjacent to left side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(5.7) it attempts frequency 2132.6MHz adjacent to right side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(5.8) step (5.4) to step (5.7) are repeated, until the frequency range of left and right sides adjacent channel exceeds boundary
Frequency threshold range, attempt demodulation frequency be followed successively by 2132.3MHz, 2132.7MHz, 2132.2MHz, 2132.8MHz,
2132.1MHz, 2132.9MHz, 2132.0MHz, 2133.0MHz fail to demodulate LTE cell；
(6) demodulation of LTE cell is carried out to B3 block；
(6.1) using 100KHz as minimum unit, according to the centre frequency of the start-stop frequency calculation block of B3 block；
2 ≈ 2137.6 (MHz) of centre frequency=2135.0+ (2140.1-2135.0) ÷ of B3 block；
(6.2) it attempts to carry out the demodulation of LTE cell to the centre frequency 2137.6MHz of B3 block, cell cannot be demodulated；
(6.3) the edge frequency threshold range of B3 block is calculated；
The edge frequency threshold range of B3 block=(2140.1-2135.0) × 20%=1.02 (MHz)；
(6.4) using 100KHz as spacing, the frequency of adjacent channel at left and right sides of centre frequency is calculated；
Left side frequency=2137.6-0.1=2137.5 (MHz)；
Right side frequency=2137.6+0.1=2137.7 (MHz)；
(6.5) judge the frequency range of left and right sides adjacent channel whether in edge frequency threshold range；
Frequency range=2137.7-2137.5=0.2 (MHz) of left and right sides adjacent channel；
0.2 (MHz) < 1.0 (MHz), without departing from edge frequency threshold range
(6.6) it attempts frequency 2137.5MHz adjacent to left side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(6.7) it attempts frequency 2137.7MHz adjacent to right side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(6.8) step (6.4) to step (6.7) are repeated, until the frequency range of left and right sides adjacent channel exceeds boundary
Frequency threshold range, attempt demodulation frequency be followed successively by 2137.4MHz, 2137.8MHz, 2137.3MHz, 2137.9MHz,
2137.2MHz, 2138.0MHz, 2137.1MHz, 2138.1MHz fail to demodulate LTE cell；
(7) demodulation of LTE cell is carried out to B4 block；
(7.1) using 100KHz as minimum unit, according to the centre frequency of the start-stop frequency calculation block of B4 block；
2 ≈ 2142.6 (MHz) of centre frequency=2140.1+ (2145.0-2140.1) ÷ of B4 block；
(7.2) it attempts to carry out the demodulation of LTE cell to the centre frequency 2142.6MHz of B4 block, cell cannot be demodulated；
(7.3) the edge frequency threshold range of B4 block is calculated；
The edge frequency threshold range of B4 block=(2145.0-2140.1) × 20%=0.98 (MHz)；
(7.4) using 100KHz as spacing, the frequency of adjacent channel at left and right sides of centre frequency is calculated；
Left side frequency=2142.6-0.1=2142.5 (MHz)；
Right side frequency=2142.6+0.1=2142.7 (MHz)；
(7.5) judge the frequency range of left and right sides adjacent channel whether in edge frequency threshold range；
Frequency range=2142.7-2142.5=0.2 (MHz) of left and right sides adjacent channel；
0.2 (MHz) < 1.0 (MHz), without departing from edge frequency threshold range
(7.6) it attempts frequency 2142.5MHz adjacent to left side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(7.7) it attempts frequency 2142.7MHz adjacent to right side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(7.8) step (7.4) to step (7.7) are repeated, until the frequency range of left and right sides adjacent channel exceeds boundary
Frequency threshold range, attempt demodulation frequency be followed successively by 2142.4MHz, 2142.8MHz, 2142.3MHz, 2142.9MHz,
2142.2MHz, 2143.0MHz fail to demodulate LTE cell；
(8) demodulation of LTE cell is carried out to B5 block；
(8.1) using 100KHz as minimum unit, according to the centre frequency of the start-stop frequency calculation block of B5 block；
Centre frequency=2145.0+ (2164.6-2145.0) ÷ 2=2154.8 (MHz) of B5 block；
(8.2) it attempts to carry out the demodulation of LTE cell to the centre frequency 2154.8MHz of B5 block, cell cannot be demodulated；
(8.3) the edge frequency threshold range of B5 block is calculated；
The edge frequency threshold range of B5 block=(2164.6-2145.0) × 20%=3.92 (MHz)；
(8.4) using 100KHz as spacing, the frequency of adjacent channel at left and right sides of centre frequency is calculated；
Left side frequency=2154.8-0.1=2154.7 (MHz)；
Right side frequency=2154.8+0.1=2154.9 (MHz)；
(8.5) judge the frequency range of left and right sides adjacent channel whether in edge frequency threshold range；
Frequency range=2154.9-2154.7=0.2 (MHz) of left and right sides adjacent channel；
0.2 (MHz) < 3.92 (MHz), without departing from edge frequency threshold range
(8.6) it attempts frequency 2154.7MHz adjacent to left side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(8.7) it attempts frequency 2154.9MHz adjacent to right side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(8.8) using 100KHz as spacing, the frequency of left and right sides adjacent channel is calculated；
Left side frequency=2154.7-0.1=2154.6 (MHz)；
Right side frequency=2154.9+0.1=2155.0 (MHz)；
(8.9) judge the frequency range of left and right sides adjacent channel whether in edge frequency threshold range；
Frequency range=2155.0-2154.6=0.4 (MHz) of left and right sides adjacent channel；
0.4 (MHz) < 3.92 (MHz), without departing from edge frequency threshold range
(8.10) it attempts frequency 2154.6MHz adjacent to left side and carries out the demodulation of LTE cell, cell cannot be demodulated；
(8.11) it attempts frequency 2155.0MHz adjacent to right side and carries out the demodulation of LTE cell, cell can be demodulated；
(8.12) demodulation of LTE cell is carried out to the 2155.0MHz of B5 block, obtain EARFCN, PCI, PSS,
The cell informations such as SSS, RS；
(9) summarize all cell informations that can be demodulated in B1 block and B5 block.
It is in specific embodiment in the above 01 frequency band search cell of LTE downlink E-UTRA, total trial carries out
The LTE cell demodulation of 37 frequencies, and if from first to last channel carries out the side of cell demodulation one by one using LTE system full frequency band
Method then needs to attempt to carry out the LTE cell demodulation of 600 frequencies.Amount to 2 frequency demodulations in B1 block and B5 block to go out
LTE cell information, corresponding LTE channel frequency is respectively 2120.0MHz, 2155.0MHz.B2 block, B3 block, in B4 block
Fail to demodulate LTE cell, in fact, these three envelope blocks are the corresponding WCDMA channel frequencies since WCDMA signal generates
Rate is respectively 2132.6MHz, 2137.6MHz, 2142.6MHz, referring specifically to Fig. 4.It is quick using a kind of LTE system of the invention
The method and apparatus for searching for cell, LTE system full frequency band can be greatly reduced, and from first to last channel carries out cell demodulation one by one
Time-consuming, greatly promoted LTE system search cell whole efficiency.
Using the method and corresponding system for realizing cell fast search in LTE system of the invention, by first to LTE
Frequency range carries out spectrum measurement, then analyzes and extracts the envelope block in frequency spectrum data, therefrom to each spectrum envelope block finally
Between the method for LTE cell demodulation is successively carried out to both ends, LTE system full frequency band from first to last channel one by one can be greatly reduced
The time-consuming of cell demodulation is carried out, the whole efficiency of LTE system search cell is greatly promoted.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that can still make
Various modifications and alterations are without departing from the spirit and scope of the invention.Therefore, the description and the appended drawings should be considered as illustrative
And not restrictive.
Claims (20)
1. realizing the method for cell fast search in a kind of LTE system, which is characterized in that the method the following steps are included:
(1) spectrum measurement is carried out to LTE frequency range；
(2) it analyzes and extracts the envelope block in frequency spectrum data；
(3) LTE cell demodulation is successively carried out from centre to both ends to each spectrum envelope block.
2. realizing the method for cell fast search in LTE system according to claim 1, which is characterized in that the step
Suddenly the resolution bandwidth RBW of spectrum measurement should be set as 100KHz in (1).
3. realizing the method for cell fast search in LTE system according to claim 1, which is characterized in that the step
Suddenly (1) multiple LTE frequency ranges if it exists then merge and unified carry out spectrum measurement.
4. realizing the method for cell fast search in LTE system according to claim 1, which is characterized in that the step
Suddenly (2) specifically includes the following steps:
(2.1) the envelope block in analysis spectrum data；
(2.2) the envelope block information in frequency spectrum data is extracted.
5. realizing the method for cell fast search in LTE system according to claim 1, which is characterized in that the step
Suddenly envelope block information includes the data of envelope block and the start-stop frequency of each envelope block in (2.2).
6. realizing the method for cell fast search in LTE system according to claim 1, which is characterized in that the step
Suddenly (3) specifically includes the following steps:
(3.1) judge whether that there are also the envelope blocks not demodulated, if it is, continuing step (3.2)；Otherwise, continue step
(3.10)；
(3.2) next envelope block to be demodulated is obtained；
(3.3) according to the centre frequency of the start-stop frequency calculation block of envelope block；
(3.4) judge whether the frequency can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise, continue to walk
Suddenly (3.5)；
(3.5) using 100KHz as spacing, the frequency of left and right sides adjacent channel is calculated；
(3.6) the edge frequency threshold range of envelope block is seen if fall out, if it is, continuing step (3.1)；Otherwise,
Continue step (3.7)；
(3.7) judge whether the adjacent frequency in left side can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise,
Continue step (3.8)；
(3.8) judge whether the adjacent frequency in right side can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise,
Continue step (3.5)；
(3.9) the LTE cell information for demodulating the frequency then proceedes to step (3.1)；
(3.10) summarize the LTE cell information of all envelope blocks.
7. realizing the method for cell fast search in LTE system according to claim 6, which is characterized in that the step
Suddenly the centre frequency calculated in (3.3) is accurate to 100KHz.
8. realizing the method for cell fast search in LTE system according to claim 6, which is characterized in that the step
Suddenly in (3.6) envelope block edge frequency threshold range using envelope block frequency range 20%, according to envelope block
Frequency range size carry out dynamic adjustment.
9. realizing the method for cell fast search in LTE system according to claim 6, which is characterized in that the step
Suddenly (3.6) specifically includes the following steps:
Judge whether the frequency difference of left and right sides adjacent channel exceeds the edge frequency threshold range of envelope block, if so,
Then continue step (3.1)；Otherwise, continue step (3.7).
10. realizing the method for cell fast search in LTE system according to claim 6, which is characterized in that the step
Suddenly LTE cell information may include EARFCN, PCI, PSS, SSS and RS in (3.9).
11. a kind of realize the system for carrying out fast search to the cell in LTE system, which is characterized in that the system includes:
Spectrum measurement unit, for carrying out spectrum measurement to LTE frequency range；
Spectrum envelope component analysis unit is connected, for analyzing and extracting in frequency spectrum data with the spectrum measurement unit
Envelope block；
LTE cell demodulating unit is connected with the spectrum envelope component analysis unit, for each spectrum envelope block from
Centre to both ends successively carry out LTE cell demodulation；
Search program, the search program carries out spectrum measurement to LTE frequency range, then analyzes and extract the envelope in frequency spectrum data
Block finally successively carries out LTE cell demodulation from centre to both ends to each spectrum envelope block, specifically follows the steps below place
Reason:
(1) spectrum measurement is carried out to LTE frequency range；
(2) it analyzes and extracts the envelope block in frequency spectrum data；
(3) LTE cell demodulation is successively carried out from centre to both ends to each spectrum envelope block.
12. according to claim 11 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In the resolution bandwidth RBW of spectrum measurement should be set as 100KHz in the step (1).
13. according to claim 11 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In, the step (1) multiple LTE frequency ranges if it exists, then merges and unified carry out spectrum measurement.
14. according to claim 11 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In, the step (2) specifically includes the following steps:
(2.1) the envelope block in analysis spectrum data；
(2.2) the envelope block information in frequency spectrum data is extracted.
15. according to claim 11 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In envelope block information includes the data of envelope block and the start-stop frequency of each envelope block in the step (2.2).
16. according to claim 11 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In, the step (3) specifically includes the following steps:
(3.1) judge whether that there are also the envelope blocks not demodulated, if it is, continuing step (3.2)；Otherwise, continue step
(3.10)；
(3.2) next envelope block to be demodulated is obtained；
(3.3) according to the centre frequency of the start-stop frequency calculation block of envelope block；
(3.4) judge whether the frequency can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise, continue to walk
Suddenly (3.5)；
(3.5) using 100KHz as spacing, the frequency of left and right sides adjacent channel is calculated；
(3.6) the edge frequency threshold range of envelope block is seen if fall out, if it is, continuing step (3.1)；Otherwise,
Continue step (3.7)；
(3.7) judge whether the adjacent frequency in left side can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise,
Continue step (3.8)；
(3.8) judge whether the adjacent frequency in right side can correctly demodulate LTE cell, if it is, continuing step (3.9)；Otherwise,
Continue step (3.5)；
(3.9) the LTE cell information for demodulating the frequency then proceedes to step (3.1)；
(3.10) summarize the LTE cell information of all envelope blocks.
17. according to claim 16 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In the centre frequency calculated in the step (3.3) is accurate to 100KHz.
18. according to claim 16 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In the edge frequency threshold range of envelope block uses the 20% of the frequency range of envelope block, root in the step (3.6)
Dynamic adjustment is carried out according to the frequency range size of envelope block.
19. according to claim 16 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In, the step (3.6) specifically includes the following steps:
Judge whether the frequency difference of left and right sides adjacent channel exceeds the edge frequency threshold range of envelope block, if so,
Then continue step (3.1)；Otherwise, continue step (3.7).
20. according to claim 16 realize that the system for carrying out fast search to the cell in LTE system, feature exist
In LTE cell information may include EARFCN, PCI, PSS, SSS and RS in the step (3.9).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111818617A (en) * | 2020-08-07 | 2020-10-23 | 上海创远仪器技术股份有限公司 | Method and device for realizing rapid searching of base station system information in LTE system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859666A (en) * | 2005-04-30 | 2006-11-08 | 大唐移动通信设备有限公司 | Cell searching method and its device for mobile communication terminal |
| CN101436900A (en) * | 2008-12-25 | 2009-05-20 | 重庆重邮信科通信技术有限公司 | Method and apparatus for scanning whole frequency band frequency point of advance system |
| CN101883411A (en) * | 2010-05-27 | 2010-11-10 | 复旦大学 | Rapid frequency scanning method and device for initial cell search |
| CN102202381A (en) * | 2010-03-26 | 2011-09-28 | 复旦大学 | Method for rapidly scanning frequency point of multiple cells |
| CN102651884A (en) * | 2011-02-25 | 2012-08-29 | 中兴通讯股份有限公司 | Frequency-point detection method, device and user equipment |
| CN106413042A (en) * | 2015-07-31 | 2017-02-15 | 展讯通信（上海）有限公司 | User terminal and frequency point search method thereof |
-
2019
- 2019-07-19 CN CN201910654951.3A patent/CN110290572A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859666A (en) * | 2005-04-30 | 2006-11-08 | 大唐移动通信设备有限公司 | Cell searching method and its device for mobile communication terminal |
| CN101436900A (en) * | 2008-12-25 | 2009-05-20 | 重庆重邮信科通信技术有限公司 | Method and apparatus for scanning whole frequency band frequency point of advance system |
| CN102202381A (en) * | 2010-03-26 | 2011-09-28 | 复旦大学 | Method for rapidly scanning frequency point of multiple cells |
| CN101883411A (en) * | 2010-05-27 | 2010-11-10 | 复旦大学 | Rapid frequency scanning method and device for initial cell search |
| CN102651884A (en) * | 2011-02-25 | 2012-08-29 | 中兴通讯股份有限公司 | Frequency-point detection method, device and user equipment |
| CN106413042A (en) * | 2015-07-31 | 2017-02-15 | 展讯通信（上海）有限公司 | User terminal and frequency point search method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111818617A (en) * | 2020-08-07 | 2020-10-23 | 上海创远仪器技术股份有限公司 | Method and device for realizing rapid searching of base station system information in LTE system |
| CN111818617B (en) * | 2020-08-07 | 2022-11-08 | 上海创远仪器技术股份有限公司 | Method and device for realizing rapid searching of base station system information in LTE system |
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