CN101013901A - Method and apparatus for cell search - Google Patents
Method and apparatus for cell search Download PDFInfo
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- CN101013901A CN101013901A CNA2007100639354A CN200710063935A CN101013901A CN 101013901 A CN101013901 A CN 101013901A CN A2007100639354 A CNA2007100639354 A CN A2007100639354A CN 200710063935 A CN200710063935 A CN 200710063935A CN 101013901 A CN101013901 A CN 101013901A
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Abstract
The invention discloses one area index method and device, which comprises the following steps: a, dividing the index wide band into multiple sections for rough ranking on frequency signals power and to store its list; b, judging whether the rough rank is zero, if yes, failure ending; if not, selecting strongest one and processing fine listing according to the frequency point power; c, according to list results on order from high to low for loading; if successful, the index succeeds and ends; if not then updating order and going back to step b.
Description
Technical field
The invention belongs to wireless communication technology field, specifically, relate to a kind of method and device of Cell searching.
Background technology
In wireless communication system, behind the mobile terminal-opening, at first need search network, and sign in to the sub-district, after the data flow that is sent with transmitter keeps synchronously, can carry out next step transfer of data.The process of search network and sub-district is called Cell searching.How to carry out Cell searching apace, and sign in to high-quality sub-district, be the key component that is directly connected to communication speed and communication quality.
The method of Cell searching comprises frequency order browsing and frequency ranking method.Frequency order browsing is according to known band information all frequencies in the full frequency band to be attempted login successively, successfully just finishes search procedure up to logining.Adopting the shortcoming of frequency order browsing is that full frequency band is long search time, is unfavorable for the power saving of portable terminal, is not particularly having under the situation of the network coverage, also will attempt login to all frequencies in the full frequency band.In addition, owing to frequency is not sorted by signal power, at first sign in to ropy sub-district possibly.
The frequency ranking method is according to the frequency signal power all frequencies to be sorted, and attempts login from each frequency successively according to frequency power order from high to low then.The shortcoming that adopts the frequency ranking method is that the frequency number is more in the search bandwidth when search bandwidth ratio broad, and the frequency ordering is consuming time longer like this, causes the Cell searching overlong time.For example, according to the frequency spectrum planning of the Ministry of Information Industry to TD SDMA (TD-SCDMA) system, divided the asymmetric frequency range of total 155MHz (1880-1920MHz, 2010-2025MHz and additional frequency range 2300-2400MHz) for the TD-SCDMA standard, if frequencies all in the 155MHz frequency range is carried out the power ordering, the time of this ordering is just quite long.And, do not having under the situation of the network coverage, still can attempt logining the sub-district of corresponding frequency from the maximum power frequency successively to the minimum power frequency.
As seen, the cell search process of portable terminal is consuming time longer in the prior art, makes troubles for user's use, also is unfavorable for the saving of portable terminal power supply, thereby need improve and perfect.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method and device of Cell searching, and the frequency number that will sort in the solution prior art is too much, search long problem consuming time.
For addressing the above problem, it is as follows to the invention provides scheme:
A kind of method of Cell searching comprises step:
A, will search for bandwidth and be divided into a plurality of frequency ranges, and according to frequency band signals power frequency range slightly be sorted, and preserve thick sequencing table;
B, judge that whether thick sequencing table is empty, if the Cell searching failure finishes; Otherwise, from thick sequencing table, choose the maximum frequency range of power, according to the frequency signal power frequency in the maximum frequency range of power is carried out the essence ordering;
C, according to smart ranking results, login from each frequency successively according to frequency power order from high to low, if login successfully, Cell searching successfully, end; Otherwise, upgrade thick sequencing table, return step B.
Preferably, in the described steps A, thick sequencer procedure specifically comprises step:
The frequency of each frequency range is represented in A1, selection;
The power of A2, the selected frequency of detection;
A3, frequency range is slightly sorted according to detected performance number.
Preferably, in the steps A 1, select frequency with the method for fixed step size.
Preferably, in the steps A 1, select frequency in conjunction with the method for maximum probability center frequency point with fixed step size.
Preferably, further comprise after the steps A 2: the frequency performance number is carried out reprocessing, and remove false frequency range.
Preferably, among the described step B, smart sequencer procedure specifically comprises step:
The frequency that carries out smart ordering in B1, the selection frequency range;
The power of B2, the selected frequency of detection;
B3, frequency is carried out essence ordering according to detected performance number.
Preferably, among the step B1, select frequency with the method for minimum range.
Preferably, further comprise after the step B2: the frequency performance number is carried out reprocessing, and remove false frequency.
Preferably, in the described steps A, the width of the frequency range of division is 1.6MHz.
A kind of device of Cell searching comprises the thick sequencing unit of frequency range, the smart sequencing unit of frequency, login unit, wherein:
The thick sequencing unit of described frequency range is used for the search bandwidth is divided into a plurality of frequency ranges, according to frequency band signals power frequency range is slightly sorted, and preserves thick sequencing table;
The smart sequencing unit of described frequency is used for choosing the maximum frequency range of power from thick sequencing table when determining thick sequencing table non-NULL, according to the frequency signal power frequency in the maximum frequency range of power is carried out essence and sorts;
Described login unit is used for according to smart ranking results, logins from each frequency successively according to frequency power order from high to low; And when login failure, upgrade thick sequencing table, and trigger the smart sequencing unit of frequency.
Preferably, the thick sequencing unit of described frequency range comprises:
Thick row's frequency chooser unit is used for the search bandwidth is divided into a plurality of frequency ranges, and the frequency of selecting to represent each frequency range;
The first frequency power detection subelement is used to detect the power of selected frequency;
Thick ordering subelement is used for according to detected performance number frequency range slightly being sorted.
Preferably, frequency is selected with the method for fixed step size in described thick row's frequency chooser unit.
Preferably, described thick row's frequency chooser unit is selected frequency with fixed step size in conjunction with the method for maximum probability center frequency point.
Preferably, the thick sequencing unit of described frequency range also comprises: the first frequency power reprocessing subelement is used for the frequency performance number is carried out reprocessing, and removes false frequency range.
Preferably, the smart sequencing unit of described frequency comprises: smart row's frequency chooser unit, be used for when determining thick sequencing table non-NULL, from thick sequencing table, choosing the maximum frequency range of power, and the frequency of selecting to carry out in the frequency range smart ordering;
The second frequency power detection subelement is used to detect the power of selected frequency;
Smart ordering subelement is used for according to detected performance number frequency being carried out the essence ordering.
Preferably, frequency is selected with the method for minimum range in the described smart frequency chooser unit of arranging.
Preferably, the smart sequencing unit of described frequency range also comprises: the second frequency power reprocessing subelement is used for the frequency performance number is carried out reprocessing, and removes false frequency.
Preferably, in the thick sequencing unit of described frequency range, the width of the frequency range of division is 1.6MHz.
Compared with prior art, the present invention is by adopting the method for the smart ordering of frequency in thick ordering of frequency range and the frequency range, and in the process of Cell searching, the frequency number that participates in ordering significantly reduces, and frequency sorts time thereby also reduce greatly, has improved the speed of Cell searching.Further, the present invention has removed false frequency range and false frequency by the frequency performance number is carried out reprocessing, can improve the speed of Cell searching on the one hand, on the other hand, not have under the situation of the network coverage, can directly finish cell search process, help the saving of portable terminal power supply.
Description of drawings
Fig. 1 is the method flow diagram of the described Cell searching of the embodiment of the invention;
Fig. 2 is a TD-SCDMA system frame structure schematic diagram;
Fig. 3 is the apparatus structure schematic diagram of the described Cell searching of the embodiment of the invention;
Fig. 4 is the concrete structure schematic diagram of the thick sequencing unit of Fig. 3 Mid Frequency;
Fig. 5 is the concrete structure schematic diagram of the smart sequencing unit of Fig. 3 intermediate-frequeney point.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Please refer to Fig. 1, be the method flow diagram of the described Cell searching of the embodiment of the invention, present embodiment is that example is described with the TD-SCDMA system, and those skilled in the art are understood that easily the present invention can also be applicable to other wireless communication systems.Described small region search method may further comprise the steps:
Step 101, will search for bandwidth and be divided into a plurality of frequency ranges.
In the TD-SCDMA system, the width of the frequency range of division is preferably 1.6MHz, and supposes that will search for bandwidth is divided into N frequency range.
Step 102, frequency range is slightly sorted, and preserve thick sequencing table according to frequency band signals power.
Thick sequencer procedure specifically comprises:
Step S21, to select represent the frequency of each frequency range, purpose be that frequency signal power with selection is as frequency band signals power.
The system of selection of frequency has two kinds:
(1) selects frequency with the method for fixed step size, maximum step-length 1.6MHz.
When step-length was 1.6MHz, each frequency range had only been chosen a frequency; When step-length was 0.8MHz, each frequency range had been chosen two frequencies.Also can select littler step-length, step-length is more little, and the frequency signal power can reflect frequency band signals power more.But along with reducing of step-length, the time of thick ordering can be elongated.In the present embodiment, step-length is preferably 0.8MHz.
(2) select frequency with fixed step size in conjunction with the method for maximum probability center frequency point.
The method of this selection frequency at first according to the definite approximate location that will select frequency of fixed step size, then according to the probability situation that may be used as center frequency point, is finely tuned on fixed step size frequency position selecting frequency.For example, step-length according to 0.8MHz, 2010.0MHz be the approximate location of the frequency that will select, but consider that 2010.2MHz is probably as center frequency point, that is to say, 2010.2MHz the probability as center frequency point is very big, 2010.2MHz will replace the value of frequency point of 2010.0MHz as thick ordering so.
The power of step S22, the selected frequency of detection.
The signal power value of the downlink synchronous sequence of selected frequency (SYNC-DL) is the power of this frequency.At first to detect the position of SYNC-DL, could calculate the signal power value of SYNC-DL then.Can detect the position of SYNC-DL by the feature window detection method.Fig. 2 is a TD-SCDMA system frame structure schematic diagram.Among the figure, TS0～TS6 represents 7 business time-slots; GP represents protection at interval, and GP does not send any signal in the period; DwPTS represents descending pilot frequency time slot; UpPTS represents uplink pilot time slot.DwPTS is that the SYNC-DL of 64 chips (chip) and length are that the GP of 32 chips forms by length, and wherein SYNC-DL is one group of pseudo noise code (PN), distributes to different sub-districts, is used for the search of sub-district and descending synchronous.
The basic principle of feature window detection method is to utilize the power of the DwPTS of down link " feature window " shape to search for the approximate location of SYNC-DL.As shown in Figure 2, SYNC-DL sign indicating number section is 64 chip lengths, and there is the GP of 32 chips on the left side, and there is the GP of 96 chips on the right.Because the power of the GP that receives is very little, and SYNC-DL sign indicating number segment data is with full power transmissions, so from the time analysis that distributes, the power of SYNC-DL is compared with both sides GP, the SYNC-DL section is " peak " value.When with the power of both sides 64 chips and (each 32 chip of every limit) divided by SYNC-DL section power and the time, the ratio that obtains should be very little.When the method with the power features window traveled through whole reception data, the position of ratio minimum promptly was the position of DwPTS.
After method by the power features window detects the position of SYNC-DL, just can calculate the performance number P of SYNC-DL
SYNC-DL=∑ P
i/ 64, wherein, P
iBe the performance number of i chip among the SYNC-DL, i=1,2 ..., 64.
In the present embodiment, can also carry out reprocessing, to remove false frequency range to the frequency performance number.
The purpose of reprocessing is when protecting positive correct detection probability, to remove false detection as far as possible.Reprocessing can be adopted the thresholding post processing mode, judges just whether frequency power satisfies:
P
SYNC-DL-P
GP＞T(dB)
Wherein, P
GPBe the performance number of GP, T is a threshold value, for example T=4dB.When satisfying the thresholding Rule of judgment, this frequency is detected as the normal power value of signal, otherwise this frequency will be judged as the reactance capacity value, and the frequency range of its representative is invalid frequency range.Invalid frequency range does not participate in frequency range and slightly sorts, and for ideal situation, when the residing position of portable terminal did not have the TD-SCDMA network coverage, the frequency of all selections all was invalid frequency, thereby all frequency ranges of these invalid frequency representatives are invalid frequency range.
Step S23, frequency range is slightly sorted according to detected performance number.
Equal the situation of 1.6MHz for step-length, the representative power of frequency band signals is:
P
n=P
1 n, wherein, P
nBe the power of n frequency range, P
1 nBe the power of the frequency in n frequency range, chosen, n=1,2 ..., N.
Equal the situation of 0.8MHz for step-length, the representative power of frequency band signals is:
P
n=max (P
1 N1, P
1 N2), wherein, P
1 N1Be the power of first frequency of in n frequency range, choosing, P
1 N2Power for second frequency in n frequency range, choosing.
Thick ordering to frequency range is according to P
n, by sorting from big to small.
Step 103～104, judge that whether thick sequencing table is empty, if the Cell searching failure finishes; Otherwise, enter step 105.
Here, thick sequencing table is for having two kinds of situations in vain, and a kind of is after carrying out reprocessing according to the frequency performance number, to have removed all frequency ranges, and promptly all frequency ranges are invalid frequency range, corresponding to the situation that does not have the TD-SCDMA network coverage; Another is all can not login in all frequency ranges.No matter which kind of situation can finish cell search process.
Step 105, from thick sequencing table, choose the maximum frequency range of power, according to the frequency signal power frequency in the maximum frequency range of power is carried out essence and sort.
The selection of the frequency range of smart ordering is from prominent frequency range, if the frequency range of maximum power can not successfully sign in to the sub-district, and then from inferior powerful frequency range, and the like.
Smart sequencer procedure specifically comprises:
The frequency that carries out smart ordering in step S51, the selection frequency range.
In the present embodiment, select frequency with the method for minimum range.
For example, be the situation of 1.6MHz for bin width, every 0.2MHz chooses a frequency, has 9 frequencies.For each smart ordering frequency, calculate its with step S21 in the distance of all thick ordering frequencies of choosing, find out and its thick ordering frequency apart from minimum, this pairing frequency range of thick ordering frequency apart from minimum is sort frequency range under frequency of this essence.Like this, the interior selected frequency points of frequency range may be 8 or 9.
The power of step S52, the selected frequency of detection.Equally, also can carry out reprocessing,, remove behind the false frequency remaining frequency for participating in effective frequency of smart ordering to remove false frequency to the frequency performance number.The detection of frequency power and the concrete grammar of reprocessing see that frequency range slightly sorts, and does not give unnecessary details here.
Step S53, frequency is carried out essence ordering according to detected performance number.
Essence ordering to frequency in the frequency range is according to P
m, by sorting from big to small.Wherein, P
mBe the power of frequency, m=1,2 ..., M, M are the numbers of effective frequency in the frequency range.
Step 106～109, according to smart ranking results, login from each frequency successively according to frequency power order from high to low, if login successfully, Cell searching successfully, end; Otherwise, upgrade thick sequencing table, return step 103.
Upgrade thick sequencing table and be meant, then, re-execute step 103 frequency range of login failure removal in the thick sequencing table, attempt login from the strongest frequency range of residue in-band signal, up to logining successfully, perhaps all frequency ranges all behind the login failure, finish cell search process.
The method of Cell searching in corresponding the above embodiment of the present invention, the device of a kind of Cell searching of corresponding here proposition.Please refer to Fig. 3, this figure is the apparatus structure schematic diagram of the described Cell searching of the embodiment of the invention.Its composition mainly comprises, the thick sequencing unit 10 of frequency range, the smart sequencing unit 20 of frequency, login unit 30.
The thick sequencing unit 10 of frequency range will be searched for bandwidth and be divided into a plurality of frequency ranges, according to frequency band signals power frequency range slightly be sorted, and preserve thick sequencing table.In the present embodiment, the width of the frequency range of division is 1.6MHz.
The smart sequencing unit 20 of frequency judges whether thick sequencing table is empty, if, the Cell searching failure then is described, finish search; Otherwise, from thick sequencing table, choose the maximum frequency range of power, according to the frequency signal power frequency in the maximum frequency range of power is carried out the essence ordering.
Please refer to Fig. 4, this figure is the concrete structure schematic diagram of the thick sequencing unit 10 of device Mid Frequency of the described Cell searching of the embodiment of the invention, comprises, slightly arranges frequency chooser unit 11, the first frequency power detection subelements 12, and subelement 13 slightly sorts.
Thick row's frequency chooser unit 11 will be searched for bandwidth and be divided into a plurality of frequency ranges, and select to represent the frequency of each frequency range.Frequency is selected with the method for fixed step size in thick row's frequency chooser unit 11, perhaps selects frequency with fixed step size in conjunction with the method for maximum probability center frequency point.
The first frequency power detection subelement 12 detects the power of selected frequency.Thick ordering subelement 13 slightly sorts to frequency range according to detected performance number.
Further, the thick sequencing unit 10 of frequency range also comprises the first frequency power reprocessing subelement, is used for the frequency performance number is carried out reprocessing, and removes false frequency range.The purpose of reprocessing is when protecting positive correct detection probability, to remove false detection as far as possible.Reprocessing can be adopted the thresholding post processing mode, and when satisfying the thresholding Rule of judgment, this frequency is detected as the normal power value of signal, otherwise this frequency will be judged as the reactance capacity value, and the frequency range of its representative is invalid frequency range.Invalid frequency range does not participate in frequency range and slightly sorts.
Please refer to Fig. 5, this figure is the concrete structure schematic diagram of the smart sequencing unit 20 of device intermediate-frequeney point of the described Cell searching of the embodiment of the invention, comprises smart row's frequency chooser unit 21, the second frequency power detection subelements 22, smart ordering subelement 23.
The maximum frequency range of power is chosen in smart row's frequency chooser unit 21 from thick sequencing table when determining thick sequencing table non-NULL, and the frequency of selecting to carry out in the frequency range smart ordering.Frequency can be selected by the method for minimum range in smart row's frequency chooser unit 21.
The second frequency power detection subelement 22 detects the power of selected frequency.Smart ordering subelement 23 carries out the essence ordering according to detected performance number to frequency.
Further, the smart sequencing unit 20 of frequency range also comprises the second frequency power reprocessing subelement, is used for the frequency performance number is carried out reprocessing, and removes false frequency.Reprocessing also can be adopted the mode of thresholding reprocessing, and when satisfying the thresholding Rule of judgment, this frequency is detected as the normal power value of signal, otherwise, this frequency will be judged as the reactance capacity value, and this frequency is invalid frequency, and invalid frequency does not participate in the smart ordering of frequency.
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (18)
1. the method for a Cell searching is characterized in that, comprises step:
A, will search for bandwidth and be divided into a plurality of frequency ranges, and according to frequency band signals power frequency range slightly be sorted, and preserve thick sequencing table;
B, judge that whether thick sequencing table is empty, if the Cell searching failure finishes; Otherwise, from thick sequencing table, choose the maximum frequency range of power, according to the frequency signal power frequency in the maximum frequency range of power is carried out the essence ordering;
C, according to smart ranking results, login from each frequency successively according to frequency power order from high to low, if login successfully, Cell searching successfully, end; Otherwise, upgrade thick sequencing table, return step B.
2. the method for claim 1 is characterized in that, in the described steps A, and thick sequencer procedure
Specifically comprise step:
The frequency of each frequency range is represented in A1, selection;
The power of A2, the selected frequency of detection;
A3, frequency range is slightly sorted according to detected performance number.
3. method as claimed in claim 2 is characterized in that:
In the steps A 1, select frequency with the method for fixed step size.
4. method as claimed in claim 2 is characterized in that:
In the steps A 1, select frequency in conjunction with the method for maximum probability center frequency point with fixed step size.
5. method as claimed in claim 2 is characterized in that, further comprises after the steps A 2:
The frequency performance number is carried out reprocessing, and remove false frequency range.
6. the method for claim 1 is characterized in that, among the described step B, and smart sequencer procedure
Specifically comprise step:
The frequency that carries out smart ordering in B1, the selection frequency range;
The power of B2, the selected frequency of detection;
B3, frequency is carried out essence ordering according to detected performance number.
7. method as claimed in claim 6 is characterized in that:
Among the step B1, select frequency with the method for minimum range.
8. method as claimed in claim 6 is characterized in that, further comprises after the step B2:
The frequency performance number is carried out reprocessing, and remove false frequency.
9. the method for claim 1 is characterized in that:
In the described steps A, the width of the frequency range of division is 1.6MHz.
10. the device of a Cell searching is characterized in that, comprises the thick sequencing unit of frequency range, the smart sequencing unit of frequency, login unit, wherein:
The thick sequencing unit of described frequency range is used for the search bandwidth is divided into a plurality of frequency ranges, according to frequency band signals power frequency range is slightly sorted, and preserves thick sequencing table;
The smart sequencing unit of described frequency is used for choosing the maximum frequency range of power from thick sequencing table when determining thick sequencing table non-NULL, according to the frequency signal power frequency in the maximum frequency range of power is carried out essence and sorts;
Described login unit is used for according to smart ranking results, logins from each frequency successively according to frequency power order from high to low; And when login failure, upgrade thick sequencing table, and trigger the smart sequencing unit of frequency.
11. device as claimed in claim 10 is characterized in that, the thick sequencing unit of described frequency range comprises:
Thick row's frequency chooser unit is used for the search bandwidth is divided into a plurality of frequency ranges, and the frequency of selecting to represent each frequency range;
The first frequency power detection subelement is used to detect the power of selected frequency;
Thick ordering subelement is used for according to detected performance number frequency range slightly being sorted.
12. device as claimed in claim 11 is characterized in that:
Frequency is selected with the method for fixed step size in described thick row's frequency chooser unit.
13. device as claimed in claim 11 is characterized in that:
Described thick row's frequency chooser unit is selected frequency with fixed step size in conjunction with the method for maximum probability center frequency point.
14. device as claimed in claim 11 is characterized in that, the thick sequencing unit of described frequency range also comprises:
The first frequency power reprocessing subelement is used for the frequency performance number is carried out reprocessing, and removes false frequency range.
15. device as claimed in claim 10 is characterized in that, the smart sequencing unit of described frequency comprises:
Smart row's frequency chooser unit is used for choosing the maximum frequency range of power from thick sequencing table when determining thick sequencing table non-NULL, and the frequency of selecting to carry out in the frequency range smart ordering;
The second frequency power detection subelement is used to detect the power of selected frequency;
Smart ordering subelement is used for according to detected performance number frequency being carried out the essence ordering.
16. device as claimed in claim 15 is characterized in that:
Frequency is selected with the method for minimum range in described smart row's frequency chooser unit.
17. device as claimed in claim 15 is characterized in that, the smart sequencing unit of described frequency range also comprises:
The second frequency power reprocessing subelement is used for the frequency performance number is carried out reprocessing, and removes false frequency.
18. device as claimed in claim 10 is characterized in that:
In the thick sequencing unit of described frequency range, the width of the frequency range of division is 1.6MHz.
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|---|---|---|---|
| CNB2007100639354A CN100544221C (en) | 2007-02-14 | 2007-02-14 | A kind of method of Cell searching and device |
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|---|---|---|---|
| CNB2007100639354A CN100544221C (en) | 2007-02-14 | 2007-02-14 | A kind of method of Cell searching and device |
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| CN100544221C CN100544221C (en) | 2009-09-23 |
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| CN101415215B (en) * | 2007-10-19 | 2010-09-01 | 联芯科技有限公司 | Method and apparatus for measuring adjacent zone of multi-mode terminal |
| CN101494886B (en) * | 2008-01-21 | 2010-09-29 | 联芯科技有限公司 | Method and apparatus for implementing frequency points ordering under GSM/GPRS connection mode |
| CN101272623B (en) * | 2008-05-08 | 2011-09-28 | 北京天碁科技有限公司 | Report method for measuring 3d event between dual-module mobile terminal system |
| CN102256282A (en) * | 2010-05-19 | 2011-11-23 | 中兴通讯股份有限公司 | Method, device and mobile terminal for quickly sweeping frequency of mobile terminal |
| CN102356671A (en) * | 2011-08-19 | 2012-02-15 | 华为技术有限公司 | Method and device of communication system frequency search |
| CN101471716B (en) * | 2007-12-26 | 2012-10-17 | 京信通信系统（中国）有限公司 | Method for searching base station carrier frequency point of GSM directly-amplifying station |
| CN102111666B (en) * | 2009-12-25 | 2013-05-08 | 深圳Tcl新技术有限公司 | Method for searching channels and digital television integrated machine using same |
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| CN101415215B (en) * | 2007-10-19 | 2010-09-01 | 联芯科技有限公司 | Method and apparatus for measuring adjacent zone of multi-mode terminal |
| CN101471716B (en) * | 2007-12-26 | 2012-10-17 | 京信通信系统（中国）有限公司 | Method for searching base station carrier frequency point of GSM directly-amplifying station |
| CN101494886B (en) * | 2008-01-21 | 2010-09-29 | 联芯科技有限公司 | Method and apparatus for implementing frequency points ordering under GSM/GPRS connection mode |
| CN101983533B (en) * | 2008-03-31 | 2013-07-31 | 株式会社Ntt都科摩 | Mobile communication method, mobile communication system, program, exchange station and specific radio base station |
| CN101272623B (en) * | 2008-05-08 | 2011-09-28 | 北京天碁科技有限公司 | Report method for measuring 3d event between dual-module mobile terminal system |
| CN102111666B (en) * | 2009-12-25 | 2013-05-08 | 深圳Tcl新技术有限公司 | Method for searching channels and digital television integrated machine using same |
| CN102256282A (en) * | 2010-05-19 | 2011-11-23 | 中兴通讯股份有限公司 | Method, device and mobile terminal for quickly sweeping frequency of mobile terminal |
| CN102256282B (en) * | 2010-05-19 | 2014-08-13 | 中兴通讯股份有限公司 | Method, device and mobile terminal for quickly sweeping frequency of mobile terminal |
| US8909181B2 (en) | 2010-05-19 | 2014-12-09 | Zte Corporation | Method and apparatus for implementing fast frequency sweeping of mobile terminal, and mobile terminal |
| WO2012119403A1 (en) * | 2011-08-19 | 2012-09-13 | 华为技术有限公司 | Method and device of searching for frequency bands in communication system |
| CN102356671A (en) * | 2011-08-19 | 2012-02-15 | 华为技术有限公司 | Method and device of communication system frequency search |
| CN102356671B (en) * | 2011-08-19 | 2013-12-18 | 华为技术有限公司 | Method and device of communication system frequency search |
| CN113133018A (en) * | 2021-04-21 | 2021-07-16 | 重庆第二师范学院 | Initial cell search method, medium and terminal applied to 5G new air interface |
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