CN105636164A - Cell searching system and method, and mobile terminal - Google Patents
Cell searching system and method, and mobile terminal Download PDFInfo
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- 238000005259 measurement Methods 0.000 description 10
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- 230000001186 cumulative effect Effects 0.000 description 4
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Abstract
The invention discloses a cell searching system and method, and a mobile terminal, and relates to the technical field of the mobile cell searching. The system comprises a selecting unit, a decoding unit, a first processing unit and a second processing unit. The method comprises the steps of: S1, selecting a target cell; S2, performing decoding on a P-CCPCH channel; S3, judging whether the decoding is successful according to a decoding result, if not, turning to a step S6; S4, configuring a BCH channel according to the decoding result; S5, receiving a system information block of the target cell, and then exiting; and S6, recording the number of failed decoding in an accumulating manner, and judging whether the number exceeds a preset maximum failed number, if yes, abandoning the target cell and returning to the step S1, and if not, continuing reading the decoding result and returning to the step S3. By adopting the above technical scheme, the cell searching process is speeded up, and the cell searching efficiency is improved.
Description
Technical field
The present invention relates to search technique field, mobile cell, particularly relate to a kind of cell searching system and method and mobile terminal.
Background technology
In prior art, mobile terminal typically requires the Whole frequency band measurement of experience community for the search of Serving cell, determine Target cell, obtain the system-frame frequency displacement (SystemFrameOffset of Target cell subsequently, and system information block (SystemInformationBlock, SIB) SFO). In prior art, said process is that serial carries out, and obtain between SIB two processes of reception at SFO, typically requiring a series of linking processing procedure, the process such as including channel release and channel configuration, then for measuring for Whole frequency band, need fantasy reciprocally to perform SFO to obtain and SIB reception, thus inevitably performing the repeatedly such as linking processing procedure such as channel release and channel configuration, then whole cell searching can expend the more time, reduces the efficiency of cell searching.
Summary of the invention
According to the above-mentioned problems in the prior art, now provide a kind of cell searching system and method and mobile terminal, it is intended to optimize cell search process, promote cell searching efficiency;
Technique scheme specifically includes:
A kind of cell searching system, it is adaptable to mobile terminal; Wherein, including
Select unit, when described mobile terminal is in standby mode, carry out Whole frequency band measurement, and select a community as Target cell;
Decoding unit, connects described selection unit, for the Primary Common Control Physical Channel of described Target cell is decoded, and exports corresponding decoded result;
First processing unit, connect described decoding unit and described selection unit respectively, the number of times that described decoding unit continuous decoding is failed is recorded for cumulative, and when the number of times that described decoding unit continuous decoding is failed exceeds the maximum frequency of failure that presets, control described selection unit and reselect described Target cell;
Second processing unit, connects described decoding unit, is used for the described decoded result according to successfully decoded and described Target cell carries out system-frame frequency displacement acquisition and system information block reception;
After described second processing unit obtains system-frame frequency displacement success, according to the corresponding system-frame frequency shift information obtained, configuration carries out the acquisition process of system information block.
Preferably, this cell searching system, wherein, also include:
Lock unit, is connected between described selection unit and described decoding unit, for configuring the primary synchronization channel of described Target cell, to realize the slot synchronization of described mobile terminal and the physical channel of described Target cell.
Preferably, this cell searching system, wherein, the described Primary Common Control Physical Channel of described Target cell is decoded by described decoding unit every default interval time, to export corresponding decoded result.
Preferably, this cell searching system, wherein, described second processing unit includes:
Frame frequency moves acquisition module, for obtaining the System Frame Number of described Target cell according to the described decoded result of output after described decoding unit successfully decoded, and obtains the system-frame frequency shift information of corresponding described Target cell according to described System Frame Number;
Channel configuration module, connects described frame frequency and moves acquisition module, for according to the described system-frame frequency shift information obtained, configuring the positional information of the common broadcast channel of described Target cell;
System information block receiver module, connects described channel configuration module, receives the system information block of described Target cell for the described common broadcast channel by having configured.
Preferably, this cell searching system, wherein, the decoded result demodulation obtained by described decoding unit successfully decoded obtains the broadcast that described Target cell issues;
Described frame frequency moves the System Frame Number of described Target cell that acquisition module is pursuant in described broadcast to obtain and the local zone time of described mobile terminal, calculates and obtains corresponding described system-frame frequency shift information.
Preferably, this cell searching system, wherein, described channel configuration module farther includes:
Start arrangement components, for the described system-frame frequency shift information according to corresponding described Target cell, it is determined that system information block receives the Startup time of process;
Be arranged in order parts, for the described System Frame Number according to corresponding described Target cell, it is determined that the reception order of system information block.
Preferably, this cell searching system, wherein, it is adaptable to WCDMA communication system.
A kind of small region search method, it is adaptable to mobile terminal; Wherein, including:
Step S1, carries out Whole frequency band measurement, to select a community as Target cell;
Step S2, is decoded the Primary Common Control Physical Channel of described Target cell, and exports corresponding decoded result;
Step S3, according to described decoded result, it is judged that whether this decoding is successful:
If this decodes unsuccessfully, then go to step S6;
Step S4, according to described decoded result, configures the positional information of the common broadcast channel of described Target cell;
Step S5, by the described common broadcast channel being configured, receives the system information block of described Target cell, with backed off after random;
Step S6, the number of times that cumulative carrying recorded decoding is failed, and judge the maximum the frequency of failure whether number of times that decoding is failed is preset more than one:
If decoding failed number of times to exceed the described maximum frequency of failure, then abandon the measurement to current described Target cell, and return described step S1;
If decoding failed number of times not less than the described maximum frequency of failure, then continue to read described decoded result, and return described step S3.
Preferably, this small region search method, wherein, when described mobile terminal is under standby mode, perform described step S1;
Preferably, this small region search method, wherein, perform, between described step S2, first to configure the primary synchronization channel of described Target cell, to realize the slot synchronization of described mobile terminal and the physical channel of described Target cell.
Preferably, this small region search method, wherein, in described step S2, with default interval time, the described Primary Common Control Physical Channel of described Target cell is decoded, and exports corresponding described decoded result.
Preferably, this small region search method, wherein, in described step S2, demodulate, by described decoded result, the broadcast that described Target cell issues;
In described step S3, decode unsuccessfully expression and cannot demodulate the described broadcast that the described Target cell of acquisition issues.
Preferably, this small region search method, wherein, described step S4 specifically includes:
Step S41, obtains the System Frame Number of described Target cell by demodulating the described broadcast obtained;
Step S42, obtains the system-frame frequency shift information of described Target cell according to described System Frame Number;
Step S43, calculates according to described system-frame frequency shift information and adjusts the Startup time of the system information block of described Target cell, and according to described System Frame Number, calculates and determine the reception order of reception process of system information block of described Target cell.
Preferably, this small region search method, wherein, in described step S42, according to described System Frame Number, and the body time of described mobile terminal, calculate the described system-frame frequency shift information obtaining described Target cell.
Preferably, this small region search method, wherein, it is adaptable to WCDMA communication system.
A kind of mobile terminal, wherein, including above-mentioned cell searching system.
A kind of mobile terminal, wherein, adopts above-mentioned small region search method.
Technique scheme provides the benefit that: shorten cell search process, and the linking processing procedure in cell searching carries out systematic optimization, promotes the efficiency of cell searching. Whole technical scheme realizes relatively simple, it is achieved less costly.
Accompanying drawing explanation
Fig. 1 is in the preferred embodiment of the present invention, the structural representation of a kind of cell searching system;
Fig. 2-3 is in the preferred embodiment of the present invention, the schematic flow sheet of a kind of small region search method.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
It should be noted that when not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
In prior art, community is selected by mobile terminal and the process of web search generally includes the following process that serial carries out:
Firstly, it is necessary to carry out community Whole frequency band measure, with by one of them community selected as Target cell to be measured;
Subsequently, Target cell is carried out the series processes such as system-frame frequency displacement confirmation and system information block reception.
In prior art, select according to community or the scene of web search is different, it may be necessary to through repetitive measurement and search, therefore said process is likely to move in circles and carries out.
And be independent between two processes that the shifting of said system frame frequency confirms and system information block receives, in prior art, need between the two process, be connected processing procedure accordingly, such as after performing system-frame frequency displacement and confirming, first carry out channel release and reconfigure the operations such as channel, starting to perform the reception of system information block subsequently again; And move in circles at mobile terminal and carry out in the process that community selects with web search, above-mentioned linking processing procedure can be repeatedly performed, so that the time that community selects and web search expends lengthens, thus reducing the efficiency of the selection of whole community and network search procedure.
In the preferred embodiment of the present invention, based on the above-mentioned problems in the prior art, a kind of cell searching system of existing offer, this cell searching system is applicable to mobile terminal, and its concrete structure is as it is shown in figure 1, include:
Select unit 1. In the preferred embodiment of the present invention, when mobile terminal is under standby mode, selects the Whole frequency band that unit 1 carries out community to measure, select a community as Target cell by measuring. In the preferred embodiment of the present invention, it is selected as the community of Target cell and is in the present invention next to need to carry out processing targeted community.
Decoding unit 2, connects above-mentioned selection unit 1. In the preferred embodiment of the present invention, after selecting unit 1 selected target community, the Primary Common Control Physical Channel (PrimaryCommonControlPhysicalChannel, P-CCPCH) of this Target cell is decoded by decoding unit 2, and obtains corresponding decoded result.
In the preferred embodiment of the present invention, decoding unit 2 is decoded according to P-CCPCH channel, obtains, with demodulation, the broadcast that this Target cell issues; In other words, in the preferred embodiment of the present invention, when decoding unit 2 demodulation obtains the broadcast that Target cell issues, then it represents that demodulate successfully, otherwise, represent and demodulate unsuccessfully. In the preferred embodiment of the present invention, the broadcast issued by demodulating the Target cell obtained can obtain the System Frame Number information (SystemFrameNumber, SFN) of corresponding Target cell.
In the preferred embodiment of the present invention, owing to timing (timing) information of P-CCPCH channel cannot be known in advance, therefore, decoding unit 2 carries out a P-CCPCH channel-decoding every default interval time, and judge the boundary information of P-CCPCH channel by detecting decoded result, thus obtaining corresponding decoded result. In other words, in the preferred embodiment of the present invention, decoding unit 2 exports a corresponding decoded result every default interval time.
In the preferred embodiment of the present invention, above-mentioned default interval time is 10ms, and namely in the preferred embodiment of the present invention, decoding unit 2 carries out the decoding of a P-CCPCH channel every 10ms.
In the preferred embodiment of the present invention, above-mentioned cell searching system also includes:
Lock unit 3, is connected between above-mentioned selection unit 1 and decoding unit 2. In the preferred embodiment of the present invention, after selecting the selected Target cell of unit 1, lock unit 3 configures the primary synchronization channel of this Target cell, to realize the slot synchronization of mobile terminal and Target cell.
In other words, in the preferred embodiment of the present invention, unit 1 is selected to determine that one community of selection is as Target cell by the Whole frequency band measurement of community, the primary synchronization channel of Target cell is configured by lock unit 3, the P-CCPCH channel of Target cell is decoded by decoding unit 2 subsequently, and exports corresponding decoded result.
In the preferred embodiment of the present invention, above-mentioned cell searching system also includes:
First processing unit 4, connects above-mentioned selection unit 1 and decoding unit 2 respectively. In the preferred embodiment of the present invention, the first processing unit 4 is for monitoring the decoded result of decoding unit 2 output, and accumulation calculating decoding unit 2 decodes failed number of times.
Specifically, in the preferred embodiment of the present invention, one counting module 41 is set in the first processing unit 4, this counting module 41 is preset with an initial zero position, when the first processing unit 4 monitor decoding unit 2 output decoded result represent decode unsuccessfully time, then in this counting module 41 count add 1. In the preferred embodiment of the present invention, owing to decoding unit 2 decoded once every default interval time (can be 10ms), therefore also correspondingly export a decoded result every default interval time (10ms); Then the first processing unit 4 is equally possible monitors the decoded result of primary decoding unit 2 number of times that accumulated counts decoding unit 2 continuous decoding is failed every default interval time (10ms). Due to record cumulative in the first processing unit 4 is the failed number of times of decoding unit 2 continuous decoding, then when the decoded result that the first processing unit 4 monitors decoding unit 2 output is successfully decoded (obtaining corresponding SFN information), first processing unit 4 would indicate that the counting of the decoding unit 2 continuous decoding frequency of failure resets, and is namely reset by the counting in counting module 41.
In the preferred embodiment of the present invention, first processing unit 4 is preset with the maximum times that a decoding is failed, then when the counting in counting module 41 exceedes above-mentioned default maximum times, represent that the failed number of times of continuous decoding alreadys more than default tolerable scope, therefore the first processing unit 4 controls to select unit 1 to remeasure and select new community as Target cell, namely abandon the Target cell currently measured, then select another community as Target cell and to attempt carrying out the process that SFO obtains and SID receives.
In the preferred embodiment of the present invention, above-mentioned cell searching system also includes:
Second processing unit 5, connects above-mentioned decoding unit 3. In the preferred embodiment of the present invention, the decoded result for the expressions successfully decoded according to the output of above-mentioned decoding unit 2 obtains corresponding SFN information, and Target cell carries out system-frame frequency displacement acquisition and system information block reception according to SFN information.
In the preferred embodiment of the present invention, the second processing unit 5 farther includes:
Frame frequency moves acquisition module 51. In the preferred embodiment of the present invention, frame frequency moves acquisition module 51 and obtains the SFN information of Target cell the system-frame frequency shift information (SFO information) according to SFN acquisition of information Target cell for the decoded result according to above-mentioned successfully decoded.
Specifically, in the preferred embodiment of the present invention, frame frequency moves acquisition module 51 according to the decoded result of output after decoding unit 2 successfully decoded, corresponding SFN information is obtained from the broadcast that the Target cell demodulated issues, frame frequency moves acquisition module 51 and obtains the local zone time of mobile terminal simultaneously, frame frequency moves the acquisition module 51 local zone time according to SFN information and mobile terminal subsequently, it is possible to calculate the SFO information obtaining current Target cell.
In the preferred embodiment of the present invention, the second processing unit 5 also includes:
Channel configuration module 52, connects above-mentioned frame frequency and moves acquisition module 51. In the preferred embodiment of the present invention, channel configuration module 52 is according to the SFN information obtained after above-mentioned decoding unit 2 successfully decoded, and above-mentioned frame frequency moves the SFO information that acquisition module 51 obtains, the common broadcast channel (BroadcastChannel, BCH) of Target cell is configured. Specifically, channel configuration module 52 is for configuring the positional information of BCH channel.
In the preferred embodiment of the present invention, above-mentioned channel configuration module 52 farther includes:
Start arrangement components 521. In the preferred embodiment of the present invention, start arrangement components 521 and move, according to above-mentioned frame frequency, the SFO information that acquisition module 51 obtains, calculate and determine that SIB receives the Startup time of process;
Be arranged in order parts 522. In the preferred embodiment of the present invention, after obtaining the success of SFO information, being arranged in order parts 522 according to the SFN information obtained after decoding unit 2 successfully decoded, calculates and adjust the SIB order received, the SIB then begun to receives process and is sequentially carried out according to the order being adjusted.
Therefore, in the preferred embodiment of the present invention, channel configuration module 52 receives the Startup time of process by configuring SIB, and the order of SIB reception configures the positional information of BCH channel.
In the preferred embodiment of the present invention, above-mentioned second processing unit 5 also includes:
System information block receiver module 53, connects above-mentioned channel configuration module 52. In the preferred embodiment of the present invention, when, after the positional information having configured BCH channel, system information block receiver module 53, according to the BCH channel configured, receives SIB information. Specifically, in the preferred embodiment of the present invention, the Startup time that system information block receiver module 53 has configured in above-mentioned channel configuration module 52, with the reception order that above-mentioned channel configuration module 52 has configured, receive SIB information by BCH channel.
In the preferred embodiment of the present invention, above-mentioned cell searching system is applicable to WCDMA communication system.
In sum, it is an object of the invention to, the number of times that decoding is failed is calculated when first a Target cell being decoded, and directly abandon the synchronization to current goal community configure when the maximum times preset more than, and turn to and select new Target cell, it thus is avoided that the process being absorbed in endless loop on a Target cell owing to decoding failure, therefore improves community and select the efficiency with network search procedure;
Simultaneously, in technical solution of the present invention, after performing SFO acquisition process, directly the positional information of BCH channel is configured by SFO information and SFN information according to obtaining, such that it is able to directly proceed by the reception process of SIB according to the BCH channel configured, optimize SFO and obtain the linking processing procedure between SIB two processes of reception, reduce the channel release process after community SFO obtains and the BCH channel configuration process before SIB reception, accelerate community to select and network search procedure, shorten flow time.
In the preferred embodiment of the present invention, based on above-mentioned cell searching system, it is provided that a kind of small region search method, it is adaptable to mobile terminal, concrete as in figure 2 it is shown, step includes:
Step S1, carries out Whole frequency band measurement, to select a community as Target cell;
In the preferred embodiment of the present invention, when mobile terminal enters under standby mode, carry out above-mentioned Whole frequency band measurement, and determine a corresponding Target cell.
Step S2, is decoded the Primary Common Control Physical Channel of Target cell, and exports corresponding decoded result;
In the preferred embodiment of the present invention, if successfully decoded, then the decoded result exported is demodulate the broadcast that Target cell issues, then can receive the SFN information of Target cell from the broadcast demodulated; If decoding unsuccessfully, then the decoded result exported represents the broadcast that cannot demodulate Target cell.
Therefore, in the preferred embodiment of the present invention, by judging decoded result, namely may determine that whether decoding is successful.
In the preferred embodiment of the present invention, in above-mentioned steps S2, every default interval time, Primary Common Control Physical Channel (P-CCPCH channel) is once decoded, therefore correspondingly export a decoded result every above-mentioned interval time; Then have only to monitor decoded result every above-mentioned interval time, namely may know that whether this decoding is successful.
In the preferred embodiment of the present invention, above-mentioned default interval time is 10ms.
In the preferred embodiment of the present invention, before performing above-mentioned steps S2, first configure the primary synchronization channel of this Target cell, to realize the slot synchronization of mobile terminal and the physical channel of Target cell; Again P-CCPCH channel is decoded subsequently.
Step S3, according to decoded result, it is judged that whether this decoding is successful:
If this decodes unsuccessfully, then go to step S6;
Step S4, according to decoded result, the positional information of the common broadcast channel of configuration Target cell;
In the preferred embodiment of the present invention, decoded result in above-mentioned steps S4 is the decoded result after successfully decoded, in other words, this decoded result represents and can demodulate the broadcast that Target cell issues, it is possible to receive the SFN information of Target cell from the broadcast demodulated.
Above-mentioned steps S4 can be described below.
Step S5, by the common broadcast channel being configured, receives the system information block of Target cell, with backed off after random;
In the preferred embodiment of the present invention, after the configuration in above-mentioned steps S4, it is possible to start SIB and receive process, receive SIB information by the BCH channel configured.
Step S6, the number of times that cumulative carrying recorded decoding is failed, and judge the maximum the frequency of failure whether number of times that decoding is failed is preset more than one:
If decoding failed number of times to exceed the maximum frequency of failure, then abandon the measurement to current Target cell, and return step S1;
If decoding failed number of times not less than the maximum frequency of failure, then continue to read decoded result, and return step S3.
In the preferred embodiment of the present invention, in above-mentioned steps S3, first an initial zero position is preset, if in above-mentioned steps S3, judge that this decoded result represents when decoding unsuccessfully (namely cannot obtain corresponding SFN information), then it represents that decode failed counting and add 1, and when certain once judges that decoded result is successfully decoded, then directly perform step S4-step S5, with backed off after random; Now, would indicate that the counting of the decoding frequency of failure resets.
In the preferred embodiment of the present invention, also preset the maximum times that a continuous decoding is failed. In the preferred embodiment of the present invention, when the counting representing the decoding frequency of failure exceedes above-mentioned default maximum times, then now think that the decoding to current goal community cannot be successful, it is further continued for down being likely to delay whole community and selects the process with web search, therefore the measurement to current goal community is abandoned, then return above-mentioned steps S1, namely re-start Whole frequency band and measure, and reselect a new community as current Target cell.
In the preferred embodiment of the present invention, when in above-mentioned steps S3, it is judged that during this successfully decoded, would indicate that the counting that decoding is failed resets.
In the preferred embodiment of the present invention, as it is shown on figure 3, above-mentioned steps S4 specifically includes:
Step S41, obtains the System Frame Number of Target cell by demodulating the broadcast obtained;
In the preferred embodiment of the present invention, decoding P-CCPCH channel success, obtain, with demodulation, the broadcast that Target cell issues; Subsequently by the SFN information of broadcast message reception to Target cell.
Step S42, obtains the system-frame frequency shift information of Target cell according to System Frame Number;
In the preferred embodiment of the present invention, according to above-mentioned SFN information, and the local zone time of mobile terminal, it is possible to calculate the SFO information obtaining Target cell.
Step S43, calculates according to system-frame frequency shift information and adjusts the Startup time of the system information block of Target cell, and according to System Frame Number, calculates and determine the reception order of reception process of system information block of Target cell.
In the preferred embodiment of the present invention, can calculate according to above-mentioned SFO information and obtain the SIB of the Target cell Startup time received; And
According to above-mentioned SFN information, it is possible to calculate the SIB reception order obtaining Target cell.
Then in the preferred embodiment of the present invention, according to calculating the Startup time determined and reception order, the positional information of BCH channel can be configured, carry out SIB thereby through the BCH channel configured and receive process.
In the preferred embodiment of the present invention, above-mentioned small region search method is applicable to WCDMA communication system.
In the preferred embodiment of the present invention, also provide for a kind of mobile terminal, including above-mentioned cell searching system.
In the preferred embodiment of the present invention, also provide for a kind of mobile terminal, wherein adopt above-mentioned small region search method.
The foregoing is only preferred embodiment of the present invention; not thereby restriction embodiments of the present invention and protection domain; to those skilled in the art; the equivalent replacement done by all utilizations description of the present invention and diagramatic content and the obtained scheme of apparent change should be can appreciate that, all should be included in protection scope of the present invention.
Claims (17)
1. a cell searching system, it is adaptable to mobile terminal; It is characterized in that, including
Select unit, when described mobile terminal is in standby mode, carry out Whole frequency band measurement, and select a community as Target cell;
Decoding unit, connects described selection unit, for the Primary Common Control Physical Channel of described Target cell is decoded, and exports corresponding decoded result;
First processing unit, connect described decoding unit and described selection unit respectively, the number of times that described decoding unit continuous decoding is failed is recorded for cumulative, and when the number of times that described decoding unit continuous decoding is failed exceeds the maximum frequency of failure that presets, control described selection unit and reselect described Target cell;
Second processing unit, connects described decoding unit, is used for the described decoded result according to successfully decoded and described Target cell carries out system-frame frequency displacement acquisition and system information block reception;
After described second processing unit obtains system-frame frequency displacement success, according to the corresponding system-frame frequency shift information obtained, configuration carries out the acquisition process of system information block.
2. cell searching system as claimed in claim 1, it is characterised in that also include:
Lock unit, is connected between described selection unit and described decoding unit, for configuring the primary synchronization channel of described Target cell, to realize the slot synchronization of described mobile terminal and the physical channel of described Target cell.
3. cell searching system as claimed in claim 1, it is characterised in that the described Primary Common Control Physical Channel of described Target cell is decoded by described decoding unit every default interval time, to export corresponding decoded result.
4. cell searching system as claimed in claim 1, it is characterised in that described second processing unit includes:
Frame frequency moves acquisition module, for obtaining the System Frame Number of described Target cell according to the described decoded result of output after described decoding unit successfully decoded, and obtains the system-frame frequency shift information of corresponding described Target cell according to described System Frame Number;
Channel configuration module, connects described frame frequency and moves acquisition module, for according to the described system-frame frequency shift information obtained, configuring the positional information of the common broadcast channel of described Target cell;
System information block receiver module, connects described channel configuration module, receives the system information block of described Target cell for the described common broadcast channel by having configured.
5. cell searching system as claimed in claim 4, it is characterised in that the decoded result demodulation obtained by described decoding unit successfully decoded obtains the broadcast that described Target cell issues;
Described frame frequency moves the System Frame Number of described Target cell that acquisition module is pursuant in described broadcast to obtain and the local zone time of described mobile terminal, calculates and obtains corresponding described system-frame frequency shift information.
6. cell searching system as claimed in claim 5, it is characterised in that described channel configuration module farther includes:
Start arrangement components, for the described system-frame frequency shift information according to corresponding described Target cell, it is determined that system information block receives the Startup time of process;
Be arranged in order parts, for the described System Frame Number according to corresponding described Target cell, it is determined that the reception order of system information block.
7. cell searching system as claimed in claim 1, it is characterised in that suitable in WCDMA communication system.
8. a small region search method, it is adaptable to mobile terminal; It is characterized in that, including:
Step S1, carries out Whole frequency band measurement, to select a community as Target cell;
Step S2, is decoded the Primary Common Control Physical Channel of described Target cell, and exports corresponding decoded result;
Step S3, according to described decoded result, it is judged that whether this decoding is successful:
If this decodes unsuccessfully, then go to step S6;
Step S4, according to described decoded result, configures the positional information of the common broadcast channel of described Target cell;
Step S5, by the described common broadcast channel being configured, receives the system information block of described Target cell, with backed off after random;
Step S6, the number of times that cumulative carrying recorded decoding is failed, and judge the maximum the frequency of failure whether number of times that decoding is failed is preset more than one:
If decoding failed number of times to exceed the described maximum frequency of failure, then abandon the measurement to current described Target cell, and return described step S1;
If decoding failed number of times not less than the described maximum frequency of failure, then continue to read described decoded result, and return described step S3.
9. small region search method as claimed in claim 8, it is characterised in that perform described step S1 when described mobile terminal is under standby mode.
10. small region search method as claimed in claim 8, it is characterised in that perform, between described step S2, first to configure the primary synchronization channel of described Target cell, to realize the slot synchronization of described mobile terminal and the physical channel of described Target cell.
11. small region search method as claimed in claim 8, it is characterised in that in described step S2, with default interval time, the described Primary Common Control Physical Channel of described Target cell is decoded, and exports corresponding described decoded result.
12. small region search method as claimed in claim 8, it is characterised in that in described step S2, demodulate, by described decoded result, the broadcast that described Target cell issues;
In described step S3, decode unsuccessfully expression and cannot demodulate the described broadcast that the described Target cell of acquisition issues.
13. small region search method as claimed in claim 12, it is characterised in that described step S4 specifically includes:
Step S41, obtains the System Frame Number of described Target cell by demodulating the described broadcast obtained;
Step S42, obtains the system-frame frequency shift information of described Target cell according to described System Frame Number;
Step S43, calculates according to described system-frame frequency shift information and adjusts the Startup time of the system information block of described Target cell, and according to described System Frame Number, calculates and determine the reception order of reception process of system information block of described Target cell.
14. small region search method as claimed in claim 13, it is characterised in that in described step S42, according to described System Frame Number, and the body time of described mobile terminal, calculate the described system-frame frequency shift information obtaining described Target cell.
15. small region search method as claimed in claim 8, it is characterised in that suitable in WCDMA communication system.
16. a mobile terminal, it is characterised in that include the cell searching system as described in claim 1-7.
17. a mobile terminal, it is characterised in that adopt the small region search method as described in claim 8-15.
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Citations (4)
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