CN103533607B

CN103533607B - Frequency band searching method and device

Info

Publication number: CN103533607B
Application number: CN201310430977.2A
Authority: CN
Inventors: 魏璟鑫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2013-09-18
Filing date: 2013-09-18
Publication date: 2017-01-25
Anticipated expiration: 2033-09-18
Also published as: CN103533607A; WO2015039520A1

Abstract

The invention relates to the technical field of communication, and discloses a frequency band searching method and a frequency band searching device. According to the scheme, high-power areas are firstly determined during frequency band searching, and a non-LTE (long term evolution) system has signal power higher than that of an LTE system, but has a narrower bandwidth, so that cells of the non-LTE system cannot be determined as the high-power areas, the problem that frequency points of the non-LTE system are sequenced before frequency points of the LTE system can be solved, and the frequency band searching time can further be shortened; in addition, when cells are searched from the determined high-power areas, a central frequency point window of each high-power area is determined, the cells are sequentially searched from the corresponding central frequency point windows of the high-power areas from the high-power areas corresponding to higher second air interface power to the high-power areas corresponding to lower second air interface power, and the probability of occurrence of the cells of the LTE system in the central frequency point windows is greater than the probability of occurrence of the cells of the LTE system in other frequency point intervals, so that the frequency band searching time is shortened, and the frequency band searching efficiency is improved.

Description

A kind of frequency band searching method and device

Technical field

The present invention relates to communication technical field, particularly to a kind of frequency band searching method and device.

Background technology

Generally, ue (user equipment, user terminal) will not have the information of place cell after powering, because This, ue after powering, needs first to carry out cell searching, obtains the configuration information of cell, could finally realize ue and base station and Communication between other ue.

Below as a example (long term evolution, Long Term Evolution) system with application scenarios as lte, first to cell with And the search in cell search process simply introduced.

In lte system, physical layer has 504 cell i d (mark), and wherein, each cell corresponds to a cell Id, and 504 cell i d are divided into 168 different groups, every group includes 3 different cell i d, specifically as shown in formula one:

Wherein,For physical-layer cell id；Represent cell group number, scope is 0～167；Compile in expression group Number, scope is 0～2.From formula one it can be seen that each physical-layer cell id () correspondence only one cell group number () With in only one group numbering ().

For cell initial search, refer to the process of ue from start to resident to one cell, ue need in this process Problem to be solved is, in the case of the configuration of known frequency range, which frequency in detection frequency range has the cell of lte system, And attempt resident in the cell searching, wherein, the frequency band search time, refer to that just sub-band is searched to confirmation from starting frequency band search Suo Chenggong (ue just stops cell searching after searching cell, will not be further continued for carrying out cell searching) or the time of failure, do not wrap Include the time of solution broadcast etc..

In actual applications, lte system utilizes pss (primary synchronization signal, main synchronous letter Number) and sss (secondary synchronization signal, auxiliary synchronous signals) complete cell searching, wherein, every 5ms Pss signal and sss signal will be sent, the pss signal repetition period is 5ms, sss signal sends in the 0th, 5 subframes, fdd (frequency division Multiplexing) frame structure when, pss signal sends in the 0th, 5 subframes, and during tdd (time division multiplex) frame structure, pss signal is in the 1st, 6 subframes Send.

In prior art, the method for frequency band search mainly has two kinds:

First method is: by the rssi of measurement frequency point, (received signal strength indicator, connects Receive signal intensity instruction), and count all frequencies (or the part frequency chosen according to a determining deviation) in certain bandwidth Rssi, then by frequency according to rssi descending after, from high in the end successively frequency is carried out with cell searching, this searching method Design philosophy be, the bigger frequency of rssi, its signal is stronger, searches out the probability of the cell of lte system on this frequency Bigger, but, the method has following defects that

In actual applications, there is likely to be non-lte system signal in frequency band, for example, gsm (global system for Mobile communications global system for mobile communications) signal, wcdma (wide-band code division Multiple access, WCDMA) signal etc., as shown in figure 1, because generally, non-lte system is believed Number transmission power be both greater than lte system signal, therefore, rssi statistics and sequence after, the carrier frequency point of non-lte system can be arranged Before there is the true frequency of lte system cell, so, the frequency band search time will be greatly prolonged；Meanwhile, lte system is sent out Penetrating bandwidth maximum has 20m, and in business datum, after rssi statistics and sequence, false carrier frequency point can come very bandwidth memory in a large number Before real frequency, therefore, the frequency band search time is longer, includes multiple frequencies, in reality in the frequency range being additionally, since ue configuration In application, the configurable frequency range of lte system (operating band) is generally wider, and frequency range (band 43) the widest has 200mhz.Carrier frequency point (hereinafter referred to as frequency) spacing (channel raster) of all frequency ranges is all 100khz, also It is in the wide-band say 200mhz, to have 2000 frequencies, if one by one detecting that each frequency whether there is the little of lte system Area, then the frequency band search time will be very long；

Second method is: based on fft (fast fourier transform, fast fourier transform) spectrum analyses Frequency band searching method, the method is: fft conversion is carried out to the time-domain signal in the certain bandwidth with certain carrier frequency point as frequency, Obtain its frequency spectrum, using spectral characteristic psd (power spectrum density, the power spectral density of different system；) carry out System identification, additionally, also descending can be carried out to fft frequency spectrum discerning power, then, the frequency to sequence from big to small enters Row cell searching, although the method can distinguish lte system and non-lte system using psd, it is to avoid the carrier wave of non-lte system Frequency leads to the defect of frequency search time length before coming true frequency, but, but it is still unavoidable from there is business datum The impact to the frequency band search time for the false carrier frequency point, therefore, this method equally exists the time-consuming longer problem of search.

As can be seen that there is a kind of time-consuming shorter, higher frequency band search of search efficiency at present yet from above-mentioned discussion Method.

Content of the invention

The embodiment of the present invention provides a kind of frequency band searching method and device, in order to solve search consumption present in prior art Duration, less efficient problem.

Concrete technical scheme provided in an embodiment of the present invention is as follows:

In a first aspect, providing a kind of frequency band searching method, comprising:

Determine that first of each of multiple frequencies frequency in nominated bandwidth eats dishes without rice or wine power, wherein it is intended that bandwidth includes The frequency that at least one includes continuous k frequency is interval, and distinguishes corresponding the by the interval k frequency including of any one frequency One power calculation of eating dishes without rice or wine obtains interval with this frequency corresponding second and eats dishes without rice or wine power, and k is positive integer；

At least one high power region is determined according to the described second power of eating dishes without rice or wine, and with each high power region phase respectively Corresponding 3rd eats dishes without rice or wine power and center frequency point window, and wherein, any one high power region includes the second power of eating dishes without rice or wine and respectively reaches The continuous n frequency of predetermined threshold value is interval, and the 3rd eats dishes without rice or wine power included by high power region corresponding center frequency point window At least one frequency interval corresponding second eat dishes without rice or wine the meansigma methodss of power, n is positive integer；

Descending sort is carried out according to the described 3rd power of eating dishes without rice or wine at least one high power region described, obtains the first sequence Information, and carry out little according to the center frequency point window that described first sequencing information includes at least one high power region described successively Area searching.

By such scheme as can be seen that when carrying out frequency band search, first determining high power region, due to non-lte system Although system signal power is strong compared with lte signal, because its bandwidth is all less, therefore, the cell of non-lte system is not determined as height Power region, the frequency that can exclude non-lte system comes problem before the frequency of lte system, and then can shorten frequency range Search time；Meanwhile, when cell searching is carried out to the high power region determined, first determine in each high power region Heart frequency window, next eats dishes without rice or wine power from high to low successively to corresponding to high power region according to high power region corresponding second Center frequency point window carry out cell searching, due to center frequency point window, the probability of the cell of lte system interval compared with other frequencies The probability cell of lte system is big, and therefore, shortening the frequency band search time (judges that search time is to search from beginning cell Rope is to first time cell searching to the time of the cell of goal systems), improve frequency band search efficiency.

In conjunction with a first aspect, in the first possible implementation, determining each in multiple frequencies in nominated bandwidth The first of individual frequency is eated dishes without rice or wine power, comprising:

Determine that first of each of multiple frequencies frequency in nominated bandwidth eats dishes without rice or wine work(according to fast fourier transform fft Rate.

In conjunction with a first aspect, or first aspect the first possible implementation, in the possible realization side of second In formula, for any one high power region, when n is even number, the interval numbering corresponding to frequency interval that center frequency point window includes It is respectively as follows: n/2-m/2+1 to n/2+m/2；When n is odd number, the interval numbering corresponding to frequency interval that center frequency point window includes It is respectively as follows: n/2-m/2 to n/2+m/2, wherein, the interval quantity of at least one frequency included by frequency window centered on m.

In conjunction with a first aspect, or first aspect the first to two kind of possible implementation, in the third possible reality In existing mode, carry out according to the center frequency point window that described first sequencing information includes at least one high power region described successively Cell searching, comprising:

If there are at least two high power region, for current high power region, in current high power region is corresponding When heart frequency window includes at least two frequencies intervals, cell searching is carried out to described at least two frequency intervals, if to described It is unsuccessful that at least two frequency intervals carry out cell searching, then to adjacent with current high power region and the corresponding 3rd eat dishes without rice or wine work( Rate carries out cell searching less than the corresponding 3rd high power interval eating dishes without rice or wine power of current high power region.

In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, to described extremely Few two frequency bins interval carries out cell searching, comprising:

According to the second power of eating dishes without rice or wine that described at least two frequencies are interval, described at least two frequency intervals are ranked up, Obtain the second sequencing information；

Cell searching is carried out to described at least two frequency intervals according to described second sequencing information.

In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, according to described Second sequencing information carries out cell searching to described at least two frequency intervals, comprising:

Cell searching is carried out to described at least two frequency intervals successively according to described second sequencing information；Or

At least one frequency interval that numbering between descending sort back zone is located at center carries out cell searching, if will Between descending sort back zone, numbering is located at least one frequency interval of center to carry out cell searching unsuccessful, by center frequency point In window first other frequencies intervals in addition to described at least one frequency interval carry out successively according to described second sequencing information little Area searching.

In conjunction with a first aspect, or first aspect the first to five kind of possible implementation, in the 6th kind of possible reality In existing mode, enter in the center frequency point window successively at least one high power region described being included according to described first sequencing information After row cell searching, also include:

Determine center frequency point window that at least one high power region described is included carry out cell searching unsuccessful when, according to Second other frequencies interval corresponding second power of eating dishes without rice or wine carries out descending sort to described second other frequency intervals, obtains the 3rd Sequencing information；

Cell searching is carried out to described second other frequency intervals according to described 3rd sequencing information；

Wherein, described second other frequencies interval include on described nominated bandwidth except at least one high power region described it Other frequencies of outer the 3rd are interval, and the 4th other frequency areas outside center frequency point window at least one high power region described Between.

In conjunction with first aspect the 5th or the 6th kind of possible implementation, in the 7th kind of possible implementation, Cell searching is carried out to any one frequency interval, comprising:

Descending sort is carried out to k frequency included by this frequency interval according to the first power of eating dishes without rice or wine, obtains the 4th and sort Information；

Cell searching is carried out to the frequency included by this frequency interval successively according to described 4th sequencing information；Or,

At least one center frequency point being in center to frequency numbering after descending sort carries out cell searching, if right After descending sort, frequency numbering is at least one center frequency point of center to carry out cell searching unsuccessful, according to described the Four sequencing informations carry out cell searching to other frequencies in addition at least one center frequency point successively.

Second aspect, provides a kind of frequency band search device, comprising:

First determining unit, first for determining each of multiple frequencies frequency in nominated bandwidth is eated dishes without rice or wine power, Wherein it is intended that bandwidth includes the frequency interval that at least one includes continuous k frequency, and by the interval k including of any one frequency Corresponding first power calculation of eating dishes without rice or wine obtains interval with this frequency corresponding second and eats dishes without rice or wine power individual frequency respectively, and k is just whole Number；

Second determining unit, at least one high power region is determined according to the described second power of eating dishes without rice or wine, and with each Individual high power region the corresponding 3rd is eated dishes without rice or wine power and center frequency point window respectively, and wherein, any one high power region includes Two eat dishes without rice or wine power respectively reach predetermined threshold value continuous n frequency interval, and the 3rd power of eating dishes without rice or wine is high power region correspondence At least one frequency included by center frequency point window interval corresponding second eat dishes without rice or wine the meansigma methodss of power, n is positive integer；

Search unit, for carrying out descending row according to the described 3rd power of eating dishes without rice or wine at least one high power region described Sequence, acquisition the first sequencing information, and successively at least one high power region described is included according to described first sequencing information Center frequency point window carries out cell searching.

In conjunction with second aspect, in the first possible implementation, described first determining unit is used for:

In conjunction with second aspect, or the first possible implementation of second aspect, in the possible realization side of second In formula, for any one second determining unit high power region of described second determining unit determination, when n is even number, center frequency The interval numbering corresponding to frequency interval that point window includes is respectively as follows: n/2-m/2+1 to n/2+m/2；When n is odd number, center frequency The interval numbering corresponding to frequency interval that point window includes is respectively as follows: n/2-m/2 to n/2+m/2, wherein, frequency window centered on m The interval quantity of at least one included frequency.

In conjunction with second aspect, or the first to two kind of possible implementation of second aspect, in the third possible reality In existing mode, described search unit is used for:

In conjunction with the third possible implementation of second aspect, in the 4th kind of possible implementation, described search Unit is used for:

In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation, described search Unit is used for:

In conjunction with second aspect, or the first to five kind of possible implementation of second aspect, in the 6th kind of possible reality In existing mode, described search unit is additionally operable to:

In conjunction with second aspect the 5th or the 6th kind of possible implementation, in the 7th kind of possible implementation, Described search unit is used for:

The third aspect, provides a kind of mobile terminal, comprising:

At least one processor, communication bus, memorizer and at least one communication interface.

Wherein, communication bus is used for realizing connecting between said modules and communicating, and communication interface is used for and external equipment Connect and communicate.

Wherein, memorizer is used for storage needs the program code of execution, when said procedure code is when executed by, real Now following function:

At least one high power region is determined according to the second power of eating dishes without rice or wine, and corresponding respectively with each high power region The 3rd eat dishes without rice or wine power and center frequency point window, wherein, any one high power region include second eat dishes without rice or wine power respectively reach default Continuous n frequency of threshold value is interval, and the 3rd eat dishes without rice or wine power be included by high power region corresponding center frequency point window extremely A few frequency interval corresponding second is eated dishes without rice or wine the meansigma methodss of power, and n is positive integer；

Descending sort is carried out according to the 3rd power of eating dishes without rice or wine at least one high power region, obtains the first sequencing information, and Successively cell searching is carried out to the center frequency point window that at least one high power region includes according to the first sequencing information.

In conjunction with the third aspect, in the first possible implementation, processor is additionally operable to, and is determined according to fft and specifies band The first of each of the multiple frequency of alleviating distention in middle-JIAO frequency is eated dishes without rice or wine power.

In conjunction with the third aspect, or the first possible implementation of the third aspect, in the possible realization side of second In formula, for any one high power region, center frequency point window has various ways, optionally, when n is even number, center frequency point window bag The interval numbering corresponding to frequency interval including is respectively as follows: n/2-m/2+1 to n/2+m/2；When n is odd number, center frequency point window bag The interval numbering corresponding to frequency interval including is respectively as follows: n/2-m/2 to n/2+m/2, wherein, included by frequency window centered on m The interval quantity of at least one frequency.

In conjunction with the third aspect, or the first to two kind of possible implementation of the third aspect, in the third possible reality In existing mode, processor is additionally operable to: if there are at least two high power region, for current high power region, in current Gao Gong When rate region corresponding center frequency point window includes at least two frequencies intervals, cell searching is carried out at least two frequency intervals, If it is unsuccessful that at least two frequency intervals are carried out with cell searching, to adjacent with current high power region and the corresponding 3rd Power of eating dishes without rice or wine carries out cell searching less than the corresponding 3rd high power interval eating dishes without rice or wine power of current high power region.

In conjunction with the third possible implementation of the third aspect, in the 4th kind of possible implementation, processor is also For: according to the second power of eating dishes without rice or wine that at least two frequencies are interval, at least two frequency intervals are ranked up, obtain second row Sequence information；

Cell searching is carried out at least two frequency intervals according to the second sequencing information.

In conjunction with the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation, processor is also For: cell searching is carried out at least two frequency intervals successively according to the second sequencing information；Or

At least one frequency interval that numbering between descending sort back zone is located at center carries out cell searching, if will Between descending sort back zone, numbering is located at least one frequency interval of center to carry out cell searching unsuccessful, by center frequency point In window, first other frequency intervals in addition at least one frequency interval carry out cell searching successively according to the second sequencing information.

In conjunction with the third aspect, or the first to five kind of possible implementation of the third aspect, in the 6th kind of possible reality In existing mode, processor is additionally operable to: determines and carries out cell searching not to the center frequency point window that at least one high power region includes When successful, descending sort is carried out to second other frequency intervals according to second other frequencies interval corresponding second power of eating dishes without rice or wine, Obtain the 3rd sequencing information；

Cell searching is carried out to second other frequency intervals according to the 3rd sequencing information；

Wherein, second other frequencies interval include on nominated bandwidth in addition at least one high power region the 3rd other Frequency is interval, and other frequencies of the 4th outside center frequency point window at least one high power region are interval.

In conjunction with the third aspect the 5th or the 6th kind of possible implementation, in the 7th kind of possible implementation, Processor is additionally operable to: carries out descending sort, acquisition the 4th according to the first power of eating dishes without rice or wine to k frequency included by this frequency interval Sequencing information；

Cell searching is carried out to the frequency included by this frequency interval successively according to the 4th sequencing information；Or,

At least one center frequency point being in center to frequency numbering after descending sort carries out cell searching, if right After descending sort, frequency numbering is at least one center frequency point of center to carry out cell searching unsuccessful, according to the 4th row Sequence information carries out cell searching to other frequencies in addition at least one center frequency point successively.

The present invention has the beneficial effect that:

In the embodiment of the present invention, when carrying out frequency band search, first determine high power region, due to non-lte system signal Although power is strong compared with lte signal, because its bandwidth is all less, therefore, the cell of non-lte system is not determined as high power area Domain, the frequency that can exclude non-lte system comes problem before the frequency of lte system, and then when can shorten frequency band search Between；Meanwhile, when cell searching is carried out to the high power region determined, first determine the center frequency point of each high power region Window, next eats dishes without rice or wine power from high to low successively to corresponding center to high power region according to high power region corresponding second Frequency window carries out cell searching, because the probability that the cell of lte system in center frequency point window lte compared with other frequency intervals The probability of the cell of system is big, and therefore, shortening the frequency band search time (judges that search time is from beginning cell searching to first Secondary cell searching is to the time of the cell of goal systems), improve frequency band search efficiency.

Brief description

Fig. 1 is the schematic diagram that there are many communication systems in prior art Mid Frequency；

The detail flowchart that Fig. 2 searches for for embodiment of the present invention Mid Frequency；

The first embodiment that Fig. 3 searches for for embodiment of the present invention Mid Frequency；

The second embodiment that Fig. 4 searches for for embodiment of the present invention Mid Frequency；

Fig. 5 is the illustrative view of functional configuration of embodiment of the present invention Mid Frequency searcher；

Fig. 6 is the illustrative view of functional configuration of terminal in the embodiment of the present invention.

Specific embodiment

Time-consuming longer, less efficient present in frequency band search process in order to solve the problems, such as, in the embodiment of the present invention, carry Go out a kind of frequency band searching method, time-consuming longer, less efficient problem can be prevented effectively from, in this scenario, carrying out frequency range During search, first determine high power region, although because non-lte system signal power is strong compared with lte signal, due to its bandwidth all Less, therefore, the cell of non-lte system is not determined as high power region, and the frequency that can exclude non-lte system comes lte Problem before the frequency of system, and then the frequency band search time can be shortened；Meanwhile, the high power region determined is being carried out During cell searching, first determine the center frequency point window of each high power region, next to high power region according to high power area Domain corresponding second power of eating dishes without rice or wine carries out cell searching to corresponding center frequency point window, from high to low successively due to center frequency point window The probability of the cell that lte system compared with other frequency intervals in the probability cell of lte system is big, therefore, shortens frequency Section search time (judge search time be from beginning cell searching to first time cell searching to the cell of goal systems when Between), improve frequency band search efficiency.

Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.

The techniques described herein may be used in various communication systems, for example current 2g, 3g communication system and next generation communication System, such as gsm, CDMA (cdma, code division multiple access) system, time division multiple acess (tdma, Time division multiple access) system, WCDMA (wcdma, wideband code division Multiple access wireless), frequency division multiple access (fdma, frequency division multiple Addressing) system, OFDM (ofdma, orthogonal frequency-division multiple Access) system, single carrier fdma (sc-fdma) system, GPRS (general packet radio service) (gprs, general packet Radio service) system, and other such communication systems.

The terms "and/or", only a kind of incidence relation of description affiliated partner, represents there may be three kinds of passes System, for example, a and/or b, can represent: individualism a, there are a and b, these three situations of individualism b simultaneously.In addition, herein Middle character "/", typically represent forward-backward correlation to as if a kind of relation of "or".

Below in conjunction with the accompanying drawings the preferred embodiment of the present invention is described in detail.

Refering to shown in Fig. 2, in the embodiment of the present invention, the detailed process of frequency band search is as follows:

Step 200: determine that first of each of multiple frequencies frequency in nominated bandwidth eats dishes without rice or wine power, wherein it is intended that Bandwidth includes the frequency interval that at least one includes continuous k frequency, and by the interval k frequency including of any one frequency respectively Corresponding first power calculation of eating dishes without rice or wine obtains interval with this frequency corresponding second and eats dishes without rice or wine power, and k is positive integer；

In this step, the power of eating dishes without rice or wine of frequency is exactly the power of the signal that ue is received on this frequency by antenna.

Step 210: at least one high power region is determined according to the second power of eating dishes without rice or wine, and divides with each high power region Not corresponding the 3rd eats dishes without rice or wine power and center frequency point window, and wherein, any one high power region includes second and eats dishes without rice or wine power respectively The continuous n frequency reaching predetermined threshold value is interval, and the 3rd eats dishes without rice or wine power for high power region corresponding center frequency point window institute Including at least one frequency interval corresponding second eat dishes without rice or wine the meansigma methodss of power, n is positive integer；

In this step, center frequency point window is the frequency window that the midpoint in frequency marks off with a region.

Step 220: descending sort is carried out according to the 3rd power of eating dishes without rice or wine at least one high power region, obtains the first sequence Information, and successively cell searching is carried out to the center frequency point window that at least one high power region includes according to the first sequencing information.

In the embodiment of the present invention, determine first of each of multiple frequencies frequency in the nominated bandwidth side eating dishes without rice or wine power Formula has multiple, optionally, determines that first of each of multiple frequencies frequency in nominated bandwidth eats dishes without rice or wine power according to fft.

In the embodiment of the present invention, it is intended that bandwidth includes, at least one frequency is interval, and continuous k frequency forms a frequency area Between, wherein, k is positive integer, has multiple values, and optionally, k is 11, and the frequency number phase included by any two frequency interval With.

For example it is intended that bandwidth includes 110 frequencies, frequency 1, frequency 2, frequency 3, frequency 4 ... ..., frequency 105, frequency 106th, frequency 107, frequency 108, frequency 109, frequency 110, continuous 11 frequencies are a frequency interval that is to say, that being somebody's turn to do Nominated bandwidth includes 10 frequency intervals, particularly as follows: frequency 1- frequency 11 be frequency interval 1, frequency 12- frequency 21 be frequency area Between 2, after the like.

In the embodiment of the present invention, not overlapping between frequency, but if the interval frequency number including of last frequency and its His frequency interval differs, then this frequency interval takes the interval frequency of above adjacent frequency, until the frequency number including with Other frequency numbers are identical.

For example, there are 75 frequencies, be divided into 8 frequency intervals, each frequency is interval to include 10 frequencies, and frequency is interval 1 includes frequency 1- frequency 10, frequency interval 2 includes frequency 11- frequency 20 ..., frequency interval 7 include frequency 61- frequency 70, Then frequency interval 8 includes frequency 66- frequency 75.

In the embodiment of the present invention, the interval k frequency including of any one frequency corresponding first is eated dishes without rice or wine power sum respectively For interval second the eating dishes without rice or wine power of this frequency.

For example, still taking above-mentioned as a example, frequency 1- frequency 11 is frequency interval 1, and wherein, frequency 1- frequency 11 corresponds to one respectively Individual first eats dishes without rice or wine power, and e.g., the power of eating dishes without rice or wine of frequency 1 is eat dishes without rice or wine power 1, the power of eating dishes without rice or wine of frequency 2 is eat dishes without rice or wine power 2, frequency 3 Power of eating dishes without rice or wine be to eat dishes without rice or wine power 3 ... ..., the power of eating dishes without rice or wine of frequency 11 is power 11 of eating dishes without rice or wine, then the second of frequency interval 1 is eated dishes without rice or wine Power is frequency 1- frequency 11 corresponding power sum of eating dishes without rice or wine respectively, that is, power 1 of eating dishes without rice or wine is to power 11 sum of eating dishes without rice or wine.

Further, in order to improve the accuracy of the high power region determined, in the embodiment of the present invention, optionally, appoint Interval quantity n of the continuous frequency included by a high power region of anticipating is the positive integer more than 8.

In the embodiment of the present invention, determine that the mode of the center frequency point window of each high power region has multiple, for each Individual high power region, optionally, by frequency corresponding for numbering interval for the frequency of the center positioned at this high power region The interval center frequency point window as this high power region, particularly as follows: when n is even number, the frequency interval institute that center frequency point window includes Corresponding interval numbering is respectively as follows: n/2-m/2+1 to n/2+m/2；When n is odd number, the frequency interval institute that center frequency point window includes Corresponding interval numbering is respectively as follows: n/2-m/2 to n/2+m/2, wherein, at least one frequency included by frequency window centered on m Interval quantity, and interval numbering is from 1 froms the beginning of, in actual applications, the value of m has multiple, for example, when n is even number, m is 4, n During for odd number, m is 3.

For example, high power region 1 includes 10 frequency intervals: frequency interval 1 (it is 1 that interval is numbered), frequency interval 2 (area Between to number be 2) ... ..., frequency interval 9 (it is 9 that interval is numbered), frequency interval 10 (it is 10 that interval is numbered), because n is even number, Therefore, the interval numbering of the frequency included by center frequency point window of high power region 1 is: 10/2-1 to 10/2+2, i.e. 4-7, That is frequency interval 4, frequency interval 5, frequency interval 6, frequency interval 7.

Again for example, high power region 2 includes 9 frequency intervals: frequency interval 11 (it is 1 that interval is numbered), frequency interval 12 (it is 2 that interval is numbered) ... ..., frequency interval 19 (it is 9 that interval is numbered), because n is odd number, therefore, the center of high power region 2 The interval numbering of frequency included by frequency window is: 9/2-3/2 to 9/2+3/2, and that is, 3-6 is that is to say, that frequency interval 13, frequency Interval 14, frequency interval 15, frequency interval 16.

In the embodiment of the present invention, eat dishes without rice or wine power for this high power region pair with the 3rd corresponding to any one high power region At least one frequency interval corresponding second that the center frequency point window answered includes is eated dishes without rice or wine the meansigma methodss of power.

For example, the corresponding center frequency point window of high power region 1 includes frequency interval 4, frequency interval 5, frequency interval 6, frequently Point interval 7, wherein, corresponding second power of eating dishes without rice or wine is respectively for frequency interval 4, frequency interval 5, frequency interval 6, frequency interval 7 Second eat dishes without rice or wine power 1, second eat dishes without rice or wine power 2, second eat dishes without rice or wine power 3, second eat dishes without rice or wine power 4, then this high power region 1 is corresponding 3rd eat dishes without rice or wine power be second eat dishes without rice or wine power 1, second eat dishes without rice or wine power 2, second eat dishes without rice or wine power 3, second eat dishes without rice or wine the average of power 4 Value.

In the embodiment of the present invention, carry out little according to the center frequency point window that the first sequencing information includes to high power region successively During area searching, if there are at least two high power region, for current high power region, in current high power region is corresponding Heart frequency window include at least two frequencies interval when, cell searching is carried out at least two frequency intervals, if at least two It is unsuccessful that frequency interval carries out cell searching, then and corresponding threeth eat dishes without rice or wine power adjacent with current high power region are less than and work as The corresponding 3rd high power interval eating dishes without rice or wine power of front high power region carries out cell searching.

For example, there are three high power region: high power region 1, high power region 2, and high power region 3, wherein, Gao Gong The corresponding center frequency point window 1 in rate region 1 includes frequency interval 11, frequency interval 12, frequency interval 13, frequency interval 14；Gao Gong The corresponding center frequency point window 2 in rate region 2 includes frequency interval 21, frequency interval 22, frequency interval 23, frequency interval 24, and high The corresponding center frequency point window 3 of power region 3 includes frequency interval 31, frequency interval 32, frequency interval 33, frequency interval 34, presses According to the 3rd order that power carries out after descending sort of eating dishes without rice or wine it is: high power region 1, high power region 2, and high power region 3, then When the center frequency point window successively high power region being included carries out cell searching, first searched for that high power region 1 includes four Individual center frequency point window, if four center frequency point windows that high power region 1 is included carry out cell searching unsuccessful after, then carry out The cell searching of four center frequency point windows that high power region 2 includes, then in the case of unsuccessful, then carry out high power region The cell searching of the 3 four center frequency point windows including.

In the embodiment of the present invention, when successively cell searching being carried out to center frequency point window according to the first sequencing information, for work as Front center frequency point window: if this current center frequency point window includes at least two frequencies intervals, will be right for this at least two frequencies interval Second answering power of eating dishes without rice or wine is ranked up to this at least two frequencies interval, obtains the second sequencing information；According to the second sequence letter Breath carries out cell searching at least two frequency intervals；Judge at least two frequency intervals to be carried out with cell searching whether successfully, If so, stop cell searching, then cell searching is carried out to the next center frequency point window adjacent with center frequency point window.

For example, three high power region: high power region 1, high power region 2, and high power region 3 are had, corresponding Center frequency point window is respectively center frequency point window 1, center frequency point window 2, center frequency point window 3, the first sequencing information after descending sort For: high power region 2, high power region, and high power region 3, wherein, the frequency that center frequency point window 2 includes is interval to be frequency Point interval 4, frequency interval 5, frequency interval 6, frequency interval 7；The frequency that center frequency point window 1 includes is interval to be frequency interval 14； The frequency that center frequency point window 3 includes is interval to be frequency interval 20, frequency interval 21, then when carrying out to center frequency point window 2, first right Corresponding second power of eating dishes without rice or wine is arranged to frequency interval 4, frequency interval 5, frequency interval 6, frequency interval 7 respectively in frequency interval Sequence, obtains the second sequencing information, carries out cell searching to this four frequency intervals, if cell searching success, stops cell and searches Rope, otherwise, then carries out the cell searching to center frequency point window 1, if cell searching success, stops cell searching, otherwise, more right Center frequency point window 3 carries out cell searching, in the same manner, in the cell searching to the cell signal that center frequency point window 3 is carried out, first to frequency Corresponding second power of eating dishes without rice or wine is ranked up to frequency interval 20, frequency interval 21 respectively in point interval, obtains the second sequencing information, Cell searching is carried out to this two frequency intervals.

In the embodiment of the present invention, successively at least two frequency intervals are carried out with the side of cell searching according to the second sequencing information Formula has multiple, optionally, carries out cell searching at least two frequency intervals successively according to the second sequencing information；Or, will drop Sequence sorts to number between back zone and carries out cell searching positioned at least one frequency interval of center, during cell searching failure, then First other frequency intervals are carried out cell searching successively according to the second sequencing information.

For example, center frequency point window includes four frequency intervals, frequency interval 1, frequency interval 2, frequency interval 3, frequency area Between 4, corresponding second eat dishes without rice or wine power respectively according to this four frequency intervals, descending sort carried out to this four frequency intervals, Two sequencing informations are: frequency interval 2, frequency interval 3, frequency interval 1, frequency interval 4, then when carrying out cell searching, according to Second sequencing information carries out cell searching to frequency interval 2, frequency interval 3, frequency interval 1, frequency interval 4 successively.

Again for example, center frequency point window includes four frequency intervals, frequency interval 1, frequency interval 2, frequency interval 3, frequency Interval 4, corresponding second eat dishes without rice or wine power respectively according to this four frequency intervals, descending sort is carried out to this four frequency intervals, Second sequencing information is: frequency interval 2, frequency interval 3, frequency interval 1, frequency interval 4, then when carrying out cell searching, first Cell searching to the cell signal that frequency interval 3, frequency interval 1 are carried out, cell searching failure when, then to frequency interval 2, frequently Point interval 4 carries out cell searching.

Further for example, center frequency point window includes three frequency intervals, frequency interval 1, frequency interval 2, frequency interval 3, according to Corresponding second eat dishes without rice or wine power respectively in these three frequency intervals, these three frequency intervals are carried out with descending sort, the second sequence letter Cease and be: frequency interval 1, frequency interval 2, frequency interval 3, then when carrying out cell searching, first cell is carried out to frequency interval 2 and search Rope, in cell searching failure, then carries out cell searching to frequency interval 1, frequency interval 3.

In the embodiment of the present invention, center refers to the position that l/2+v to l/2-v is located, and wherein, l is the frequency existing Interval, v is the positive integer less than l/2.

For example, 10 frequency intervals are had, that is, l is 102: frequency interval 62 (it is 1 that interval is numbered), frequency interval 65 (area Between to number be 2), frequency interval 32 (it is 3 that interval is numbered), frequency interval 42 (it is 4 that interval is numbered), frequency interval 72 (interval compile Number be 5), frequency interval 22 (it is 6 that interval is numbered), frequency interval 82 (it is 7 that interval is numbered), (interval is numbered and is in frequency interval 83 8), frequency interval 92 (it is 9 that interval is numbered), frequency interval 102 (it is 10 that interval is numbered), if center frequency point window includes four frequencies Interval, then center is frequency interval 42 (it is 4 that interval is numbered), frequency interval 72 (it is 5 that interval is numbered), frequency interval 22 (it is 6 that interval is numbered), frequency interval 82 (it is 7 that interval is numbered)；If it is interval that center frequency point window includes two frequency bins, center For frequency interval 72 (it is 5 that interval is numbered), frequency interval 22 (it is 6 that interval is numbered).

In the embodiment of the present invention, in the center frequency successively at least one high power region being included according to the first sequencing information After point window carries out cell searching, can also carry out and operate as follows:

Determine the center frequency point window that at least one high power region includes carried out cell searching unsuccessful when, according to second Other frequencies interval corresponding second power of eating dishes without rice or wine carries out descending sort to second other frequency intervals, obtains the 3rd sequence letter Breath；

In the embodiment of the present invention, the mode that carries out cell searching to any one frequency interval has multiple, optionally, according to this The corresponding to frequency first power of eating dishes without rice or wine that frequency is interval to be included carries out descending sort to included all frequencies, obtains the 4th Sequencing information；Cell searching is carried out to included frequency successively according to the 4th sequencing information；Or

At least one center frequency point being in center to frequency numbering after descending sort is carried out after cell searching, then presses Successively cell searching is carried out to other frequencies in addition at least one center frequency point according to the 4th sequencing information.

Embodiment for a better understanding of the present invention, concrete application scene given below, for the process of frequency band search, make Go out to describe in further detail:

Embodiment one, specifically as shown in Figure 3:

Step 300: determine that 1100 frequencies that nominated bandwidth includes corresponding first are eated dishes without rice or wine power respectively；

In this step, this nominated bandwidth includes 100 frequency intervals, and every 11 continuous frequencies are a frequency area Between.

Meanwhile, in this step, each frequency interval corresponding second power of eating dishes without rice or wine is the interval institute including of this frequency Frequency corresponding first is had to eat dishes without rice or wine power sum.

Step 310: determine three high power region, high power region 1, high power region 2, high power region 3；

In this step, high power region 1 includes frequency interval 1, frequency interval 2 ... ..., frequency interval 8, and above-mentioned 8 Corresponding second power of eating dishes without rice or wine all has reached predetermined threshold value respectively in individual frequency interval, in the same manner, high power region 2 and high power area Domain 3 also includes the continuous frequency interval that 8 corresponding second power of eating dishes without rice or wine all have reached predetermined threshold value respectively.

Step 320: respectively determine high power region 1, high power region 2, the 3rd of high power region 3 the eat dishes without rice or wine power and in Heart frequency window；

In this step, the center frequency point window 1 of the high power region 1 determined is frequency interval 4, frequency interval 5, frequency Interval 6, frequency interval 7；The center frequency point window 2 of high power region 2 is frequency interval 14, frequency interval 15, frequency interval 16, frequently Point interval 17；The center frequency point window 3 of high power region 3 is frequency interval 24, frequency interval 25, frequency interval 26, frequency are interval 27.

Step 330: eat dishes without rice or wine power respectively to center frequency point window 1, center frequency point window according to high power region the corresponding 3rd 2nd, center frequency point window 3 carries out descending sort, obtains the first sequencing information: high power region 2, high power region 1, high power region 3；

Step 340: successively cell searching is carried out to high power region 2, high power region 1, high power region 3；

In this step, when cell searching being carried out to each high power region, by corresponding for this high power region center After the completion of all frequency intervals that frequency window includes all carry out cell searching, if cell searching failure, then to next high power Region carries out cell searching, wherein, when carrying out cell searching to each center frequency point window, is carried out operating as follows, such as centering When heart frequency window 2 carries out cell searching, power is eated dishes without rice or wine to frequency interval 14, frequency interval according to frequency interval corresponding second 15th, frequency interval 16, frequency interval 17 carry out descending sort, obtain the second sequencing information: frequency interval 15, frequency interval 14, Frequency interval 17, frequency interval 16 are that is to say, that interval according to frequency interval 15, frequency interval 14, frequency interval 17, frequency 16 order carries out cell searching successively.Center frequency point window 1 and center frequency point window 3 are carried out the process of first cell searching with upper Process of stating is similar to, and here is no longer described in detail one by one.

Step 350: search the cell of lte system in center frequency point window 3, therefore, stop cell searching.

Embodiment two, specifically as shown in Figure 4:

Step 400: determine that 1100 frequencies that nominated bandwidth includes corresponding first are eated dishes without rice or wine power respectively；

Step 410: determine three high power region, high power region 1, high power region 2, high power region 3；

Step 420: respectively determine high power region 1, high power region 2, the 3rd of high power region 3 the eat dishes without rice or wine power and in Heart frequency window；

Step 430: eat dishes without rice or wine power respectively to center frequency point window 1, center frequency point window according to high power region the corresponding 3rd 2nd, center frequency point window 3 carries out descending sort, obtains the first sequencing information: high power region 2, high power region 1, high power region 3；

Step 440: successively cell searching is carried out to high power region 2, high power region 1, high power region 3；

In this step, when cell searching being carried out to each high power region, by corresponding for this high power region center When the frequency interval that frequency window includes carries out cell searching, if cell searching failure, more next high power region is carried out little Area searching, wherein, when carrying out cell searching to each center frequency point window, is carried out operating as follows, such as center frequency point window 2 is entered During row cell searching, power is eated dishes without rice or wine to frequency interval 14, frequency interval 15, frequency interval according to frequency interval corresponding second 16th, frequency interval 17 carries out descending sort, obtains the second sequencing information: frequency interval 15, frequency interval 14, frequency interval 17, Frequency interval 16 that is to say, that according to frequency interval 15, frequency interval 14, frequency interval 17, frequency interval 16 order successively Carry out cell searching.The process carrying out cell searching with center frequency point window 3 to center frequency point window 1 is similar with said process, here No longer described in detail one by one.

In this step, in center frequency point window 1, center frequency point window 2, center frequency point window 3 all non-cell searching to lte system The cell of system, therefore, proceeds cell searching.

Step 450: by other frequencies in addition to center frequency point window 1, center frequency point window 2, center frequency point window 3 on nominated bandwidth Point is interval, carries out descending sort according to frequency interval corresponding second power of eating dishes without rice or wine, obtains the 3rd sequencing information；And according to the 3rd Sequencing information carries out cell searching to second other frequency intervals successively.

In above-described embodiment, when k value is 11, it is primarily directed to lte system, because step 200-230 can be for all System, if step 200-230 is directed to other system, the optional value of k is other, and here is no longer described in detail.

In the same manner, the optional value of above-mentioned n, m is also primarily directed to lte system, because step 200-230 can be for all System, if step 200-230 is directed to other system, the optional value of n, m is other, and here is no longer described in detail.

Refering to shown in Fig. 5, the embodiment of the present invention also provides a kind of frequency band search device, and this frequency band search device includes:

First determining unit 500, first for determining each of multiple frequencies frequency in nominated bandwidth is eated dishes without rice or wine work( Rate, wherein it is intended that bandwidth includes the frequency interval that at least one includes continuous k frequency, and is included by any one frequency is interval K frequency the corresponding first power calculation of eating dishes without rice or wine obtains interval with this frequency corresponding second and eats dishes without rice or wine power respectively, k is just Integer；

Second determining unit 510, at least one high power region is determined according to the second power of eating dishes without rice or wine, and and each High power region the corresponding 3rd is eated dishes without rice or wine power and center frequency point window respectively, and wherein, any one high power region includes second Eat dishes without rice or wine power respectively reach predetermined threshold value continuous n frequency interval, and the 3rd power of eating dishes without rice or wine is that high power region is corresponding At least one frequency interval corresponding second included by center frequency point window is eated dishes without rice or wine the meansigma methodss of power, and n is positive integer；

Search unit 520, for carrying out descending sort according to the 3rd power of eating dishes without rice or wine at least one high power region, obtains First sequencing information, and successively the center frequency point window that at least one high power region includes is carried out little according to the first sequencing information Area searching.

In the embodiment of the present invention, optionally, the first determining unit 500 is used for:

In the embodiment of the present invention, for any one second determining unit high power region of the second determining unit 510 determination, When n is even number, the interval numbering corresponding to frequency interval that center frequency point window includes is respectively as follows: n/2-m/2+1 to n/2+m/2；n During for odd number, the interval numbering corresponding to frequency interval that center frequency point window includes is respectively as follows: n/2-m/2 to n/2+m/2, its In, the interval quantity of at least one frequency included by frequency window centered on m.

In the embodiment of the present invention, optionally, search unit 520 is used for:

If there are at least two high power region, for current high power region, in current high power region is corresponding Heart frequency window include at least two frequencies interval when, cell searching is carried out at least two frequency intervals, if at least two It is unsuccessful that frequency interval carries out cell searching, then and corresponding threeth eat dishes without rice or wine power adjacent with current high power region are less than and work as The corresponding 3rd high power interval eating dishes without rice or wine power of front high power region carries out cell searching.

According to the second power of eating dishes without rice or wine that at least two frequencies are interval, at least two frequency intervals are ranked up, obtain second Sequencing information；

Cell searching is carried out at least two frequency intervals successively according to the second sequencing information；Or

Further, in the embodiment of the present invention, search unit 520 is additionally operable to:

The concrete function of above each unit or module refer to before embodiment of the method description.

As shown in fig. 6, being another kind mobile terminal structure figure provided in an embodiment of the present invention, mobile terminal includes at least one Individual processor 601, communication bus 602, memorizer 603 and at least one communication interface 604.

Wherein, communication bus 602 be used for realize connecting between said modules and communicate, communication interface 604 be used for outer Portion's equipment connects and communicates.

Wherein, memorizer 603 be used for storage need execution program code, memorizer 603 can be one non-volatile Memorizer, processor 601, from memorizer 603 program code read and when executing described program code, implements function such as:

Further, processor 601, when determine each frequency first eats dishes without rice or wine power, optionally, determines according to fft In nominated bandwidth, the first of each of multiple frequencies frequency is eated dishes without rice or wine power.

In the embodiment of the present invention, for any one high power region determining, center frequency point window has various ways, optional , when n is even number, the interval numbering corresponding to frequency interval that center frequency point window includes is respectively as follows: n/2-m/2+1 to n/2+m/ 2；When n is odd number, the interval numbering corresponding to frequency interval that center frequency point window includes is respectively as follows: n/2-m/2 to n/2+m/2, Wherein, the interval quantity of at least one frequency included by frequency window centered on m.

In the embodiment of the present invention, optionally, processor 601 is additionally operable to: if exist at least two high power region, for work as Front high power region, when current high power region corresponding center frequency point window includes at least two frequencies intervals, at least two Individual frequency interval carries out cell searching, if it is unsuccessful that at least two frequency intervals are carried out with cell searching, to current height Power region is adjacent and the corresponding 3rd power of eating dishes without rice or wine is eated dishes without rice or wine less than current high power region the corresponding 3rd high power of power Interval carries out cell searching.

In the embodiment of the present invention, optionally, processor 601 is additionally operable to: eats dishes without rice or wine according to the second of at least two frequencies intervals Power is ranked up at least two frequency intervals, obtains the second sequencing information；

In the embodiment of the present invention, optionally, processor 601 is additionally operable to: according to the second sequencing information successively at least two Frequency interval carries out cell searching；Or

In the embodiment of the present invention, optionally, processor 601 is additionally operable to: determination includes at least one high power region Center frequency point window carry out cell searching unsuccessful when, according to second other frequencies interval corresponding second eat dishes without rice or wine power to second its His frequency interval carries out descending sort, obtains the 3rd sequencing information；

In the embodiment of the present invention, optionally, processor 601 is additionally operable to: eats dishes without rice or wine power to this frequency interval institute according to first Including k frequency carry out descending sort, obtain the 4th sequencing information；

In sum, time-consuming longer, less efficient present in frequency band search process in order to solve the problems, such as, the present invention is real Apply in example, propose a kind of frequency band searching method, time-consuming longer, less efficient problem can be prevented effectively from, search carrying out frequency range Suo Shi, first determines high power region, although because non-lte system signal power is strong compared with lte signal, due to its bandwidth all relatively Little, therefore, the cell of non-lte system is not determined as high power region, and the frequency that can exclude non-lte system comes lte system Problem before the frequency of system, and then the frequency band search time can be shortened；Meanwhile, the high power region determined is carried out little During area searching, first determine the center frequency point window of each high power region, next to high power region according to high power region Corresponding second power of eating dishes without rice or wine carries out cell searching to corresponding center frequency point window, from high to low successively because center frequency point window goes out The probability that the cell of lte system compared with other frequency intervals in the probability of the cell of existing lte system is big, therefore, shortens frequency range Search time (judges that search time is to first time cell searching to the time of the cell of goal systems from beginning cell searching), Improve frequency band search efficiency.

The present invention is the flow process with reference to method according to embodiments of the present invention, equipment (system) and computer program Figure and/or block diagram are describing.It should be understood that can be by each stream in computer program instructions flowchart and/or block diagram Flow process in journey and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided Instruct general purpose computer, the processor of special-purpose computer, Embedded Processor or other programmable data processing device to produce A raw machine is so that produced for reality by the instruction of computer or the computing device of other programmable data processing device The device of the function in present one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device with spy Determine in the computer-readable memory that mode works so that the instruction generation inclusion being stored in this computer-readable memory refers to Make the manufacture of device, this command device realize in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or Function in multiple square frames.

These computer program instructions also can be loaded in computer or other programmable data processing device so that counting On calculation machine or other programmable device, execution series of operation steps to be to produce computer implemented process, thus in computer or On other programmable devices, the instruction of execution is provided for realizing in one flow process of flow chart or multiple flow process and/or block diagram one The step of the function in individual square frame or multiple square frame.

Although having been described for the above embodiment of the present invention, those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So, claims be intended to be construed to including on State embodiment and fall into being had altered and changing of the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the embodiment of the present invention The spirit and scope of bright embodiment.So, if these modifications of the embodiment of the present invention and modification belong to the claims in the present invention And its within the scope of equivalent technologies, then the present invention is also intended to comprise these changes and modification.

Claims

1. a kind of frequency band searching method is it is characterised in that include:

Determine that first of each of multiple frequencies frequency in nominated bandwidth eats dishes without rice or wine power, wherein it is intended that bandwidth is included at least One frequency including continuous k frequency is interval, and by the interval k frequency including of any one frequency corresponding first sky respectively Mouthful power calculation obtains interval with this frequency corresponding second and eats dishes without rice or wine power, and k is positive integer；

At least one high power region is determined according to the described second power of eating dishes without rice or wine, and corresponding respectively with each high power region The 3rd eat dishes without rice or wine power and center frequency point window, wherein, any one high power region include second eat dishes without rice or wine power respectively reach default Continuous n frequency of threshold value is interval, and the 3rd eat dishes without rice or wine power be included by high power region corresponding center frequency point window extremely A few frequency interval corresponding second is eated dishes without rice or wine the meansigma methodss of power, and n is positive integer；

Descending sort is carried out according to the described 3rd power of eating dishes without rice or wine at least one high power region described, obtains the first sequence letter Breath, and carry out cell according to the center frequency point window that described first sequencing information includes at least one high power region described successively Search.

2. the method for claim 1 is it is characterised in that determine each of multiple frequencies frequency in nominated bandwidth First eats dishes without rice or wine power, comprising:

Determine that first of each of multiple frequencies frequency in nominated bandwidth eats dishes without rice or wine power according to fast fourier transform fft.

3. method as claimed in claim 1 or 2 it is characterised in that be directed to any one high power region, n be even number when, center The interval numbering corresponding to frequency interval that frequency window includes is respectively as follows: n/2-m/2+1 to n/2+m/2；When n is odd number, center The interval numbering corresponding to frequency interval that frequency window includes is respectively as follows: n/2-m/2 to n/2+m/2, wherein, frequency centered on m The interval quantity of at least one frequency included by window.

4. method as claimed in claim 1 or 2 it is characterised in that according to described first sequencing information successively to described at least The center frequency point window that one high power region includes carries out cell searching, comprising:

If there are at least two high power region, for current high power region, in current high power region corresponding center frequency Point window include at least two frequencies interval when, described at least two frequency intervals are carried out with cell searching, if to described at least It is unsuccessful that two frequency bins interval carries out cell searching, then to adjacent with current high power region and the corresponding 3rd power of eating dishes without rice or wine is little Carry out cell searching in the corresponding 3rd high power interval eating dishes without rice or wine power of current high power region.

5. method as claimed in claim 4, it is characterised in that carrying out cell searching to described at least two frequency intervals, is wrapped Include:

According to the second power of eating dishes without rice or wine that described at least two frequencies are interval, described at least two frequency intervals are ranked up, obtain Second sequencing information；

6. method as claimed in claim 5 is it is characterised in that according to described second sequencing information to described at least two frequencies Interval carries out cell searching, comprising:

At least one frequency interval that numbering between descending sort back zone is located at center carries out cell searching, if by descending It is unsuccessful, by center frequency point window that the numbering between back zone that sorts carries out cell searching positioned at least one frequency interval of center First other frequency intervals in addition at least one frequency interval described carry out cell successively according to described second sequencing information and search Rope.

7. method as claimed in claim 1 or 2 it is characterised in that according to described first sequencing information successively to described extremely After the center frequency point window that a few high power region includes carries out cell searching, also include:

Determine center frequency point window that at least one high power region described is included carry out cell searching unsuccessful when, according to second Other frequencies interval corresponding second power of eating dishes without rice or wine carries out descending sort to described second other frequency intervals, obtains the 3rd sequence Information；

Wherein, on described second other frequencies described nominated bandwidth of interval inclusion in addition at least one high power region described 3rd other frequencies are interval, and other frequencies of the 4th outside center frequency point window at least one high power region described are interval.

8. method as claimed in claim 6 is it is characterised in that carry out cell searching to any one frequency interval, comprising:

Descending sort, acquisition the 4th sequencing information are carried out according to the first power of eating dishes without rice or wine to k frequency included by this frequency interval；

At least one center frequency point being in center to frequency numbering after descending sort carries out cell searching, if to descending After sequence, frequency numbering is at least one center frequency point of center to carry out cell searching unsuccessful, according to described 4th row Sequence information carries out cell searching to other frequencies in addition at least one center frequency point successively.

9. a kind of frequency band search device is it is characterised in that include:

First determining unit, first for determining each of multiple frequencies frequency in nominated bandwidth is eated dishes without rice or wine power, wherein, Nominated bandwidth includes the frequency interval that at least one includes continuous k frequency, and by the interval k frequency including of any one frequency Corresponding first power calculation of eating dishes without rice or wine obtains interval with this frequency corresponding second and eats dishes without rice or wine power respectively, and k is positive integer；

Second determining unit is for determining at least one high power region according to the described second power of eating dishes without rice or wine and high with each Power region the corresponding 3rd is eated dishes without rice or wine power and center frequency point window respectively, and wherein, it is empty that any one high power region includes second The continuous n frequency that mouthful power respectively reaches predetermined threshold value is interval, and the 3rd eat dishes without rice or wine power for high power region corresponding in At least one frequency interval corresponding second included by heart frequency window is eated dishes without rice or wine the meansigma methodss of power, and n is positive integer；

Search unit, for carrying out descending sort according to the described 3rd power of eating dishes without rice or wine at least one high power region described, obtains Take the first sequencing information, and the center frequency successively at least one high power region described being included according to described first sequencing information Point window carries out cell searching.

10. device as claimed in claim 9 is it is characterised in that described first determining unit is used for:

11. devices as described in claim 9 or 10 are it is characterised in that be directed to any one of described second determining unit determination Second determining unit high power region, when n is even number, the interval numbering corresponding to frequency interval that center frequency point window includes is respectively For: n/2-m/2+1 to n/2+m/2；When n is odd number, the interval numbering corresponding to frequency interval that center frequency point window includes is respectively For: n/2-m/2 to n/2+m/2, wherein, the interval quantity of at least one frequency included by frequency window centered on m.

12. devices as described in claim 9 or 10 are it is characterised in that described search unit is used for:

13. devices as claimed in claim 12 are it is characterised in that described search unit is used for:

14. devices as claimed in claim 13 are it is characterised in that described search unit is used for:

Cell searching is carried out to described at least two frequency intervals successively according to described second sequencing information；Or by descending sort Between back zone, numbering carries out cell searching positioned at least one frequency interval of center, if will number between descending sort back zone Carry out cell searching positioned at least one frequency interval of center unsuccessful, by remove in center frequency point window described at least one Other frequency intervals of outside frequency interval first carry out cell searching successively according to described second sequencing information.

15. devices as described in claim 9 or 10 are it is characterised in that described search unit is additionally operable to:

16. devices as claimed in claim 14 are it is characterised in that described search unit is used for: