CN109348524A - A kind of frequency band searching method and device - Google Patents
A kind of frequency band searching method and device Download PDFInfo
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- CN109348524A CN109348524A CN201811321200.1A CN201811321200A CN109348524A CN 109348524 A CN109348524 A CN 109348524A CN 201811321200 A CN201811321200 A CN 201811321200A CN 109348524 A CN109348524 A CN 109348524A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a kind of frequency band searching method and devices, are applied to wireless communication technology field.Method includes: the signal strength statistic respectively assessed the time-domain signal of frequency point in the multiple assessment frequency points received in a frequency range by first antenna connection type, and obtain the time-domain signal of each assessment frequency point；Judge whether the signal strength statistic of the time-domain signal of multiple assessment frequency points is respectively less than preset power threshold；When the signal strength statistic of the time-domain signal of multiple assessment frequency points is respectively less than preset power threshold, it is changed to and re-starts frequency band search by the second antenna links scenarios.By the above-mentioned means, frequency band search time-consuming can be greatly decreased while not reducing robustness in the present invention.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to a kind of frequency band searching method and device.
Background technique
In wireless communications, terminal (User Equipment, UE) needs to detect institute in the case where known frequency range configures
Whether there is long term evolution (Long Term Evolution, LTE) signal in configuration frequency range.If there is LTE signal also needs further
Confirmation is in which frequency point, to attempt the cell for being resident LTE system in these frequency points.The frequency band search time is longer, user
It is poorer to experience, while terminal power consumption amount is also bigger.To accelerate frequency band search speed, frequency band search generallys use ordering structure, and one
As several assessment frequency points, each assessment frequency point one frequency point window of correspondence are first equidistantly chosen in frequency range.First by certain measurement
It sorts to assessment frequency point sequence, then to each frequency point in the corresponding frequency point window of assessment frequency point.
The LTE mode of terminal mostly uses greatly two channels, is divided into main collection channel and diversity channel, and reception is responsible in main collection channel
Downlink and transmission uplink LTE signal, diversity channel are only responsible for receiving downlink LTE signal.When terminal supports multimode to work at the same time,
LTE diversity channel would generally with other mode shared antennas, such as global system for mobile communications (GlobalSystemforMobileCo
Mmunication, GSM).Collect antenna based on the antenna abbreviation being connected with main collection channel, the antenna being connected with diversity channel is referred to as
For diversity antenna.It holds in some aerial position, the signal quality that the corresponding channel reception of this antenna can be made to arrive is very poor, letter
Number power drop tens db (decibel) reduces search performance.For the multimode terminal with metal shell, user holding in LTE
Main collection antenna and LTE diversity antenna can make the LTE signal quality received very poor by other modes when occupying such as GSM,
Cause to search less than LTE cell.If such case occurs to will lead to preferable in LTE signal power in the LTE frequency band search stage
Place, terminal are resident less than LTE cell.
Existing solution is: to each frequency range, first carrying out a LTE frequency band search by antenna direct-passing mode, such as searches
Rope is to LTE cell, then frequency band search terminates；If entire frequency band search completion does not search out LTE cell, also need to hand over by antenna
Fork mode carries out a LTE frequency band search to identical frequency range again.As shown in Figure 1, there are two days by metal shell multimode terminal LTE
Line, respectively Ant1, Ant2.User hand is held on Ant1.When antenna is led directly to, shown in figure a as shown in figure 1, the main collection channel LTE
LTE TRx is connect with Ant1, since the hand of user has held Ant1, so the signal quality that this channel reception arrives is very poor.LTE points
Collection channel LTE DRx is connect with Ant2, since gsm system occupies Ant2, so this channel reception is less than LTE signal.In antenna
When intersection, shown in figure b as shown in figure 1, the main collection channel LTE TRx of LTE is connect with Ant2, avoids the antenna of user's holding, institute
LTE signal can be normally received with this channel.LTE diversity channel LTE DRx is connect with Ant1, since gsm system occupies Ant1,
So this channel reception is less than LTE signal.
CDMA (the Time Division-Synchronous Code Division of the time division synchronous of terminal at present
Multiple Access, TD-SCDMA) mode mostly only have 1 main collection channel, be responsible for receive downlink and send uplink TD-
SCDMA signal.Although the problem of being occupied there is no diversity antenna by other modes, user holds the TD- of metal case terminal
When the main collection antenna of SCDMA, if do not used antenna to switch, it can also make the TD-SCDMA signal quality received very poor, cause to search
Less than TD-SCDMA cell.If such case occurs to also result in and believe in TD-SCDMA in the TD-SCDMA frequency band search stage
Number quality is local well, and terminal is resident less than TD-SCDMA cell.
The optimal antenna links scenarios of intelligent recognition are unable to although frequency band search scheme is simple by the prior art, and
Most severe scene frequency band search time-consuming is too long, compares single frequency band search, the most severe scene search time can be double, seriously affects
User experience.
Summary of the invention
Embodiment of the present invention provides a kind of frequency band searching method and device, can be while not reducing robustness, greatly
It is time-consuming that width reduces frequency band search.
First aspect provides a kind of frequency band searching method, comprising: receives by first antenna connection type more in a frequency range
The time-domain signal of frequency point is respectively assessed in a assessment frequency point, and obtains the signal strength statistic of the time-domain signal of each assessment frequency point；
Judge whether the signal strength statistic of the time-domain signal of multiple assessment frequency points is respectively less than preset power threshold；In multiple assessments
When the signal strength statistic of the time-domain signal of frequency point is respectively less than preset power threshold, it is changed to by the second antenna links scenarios
Re-start frequency band search.
Implementation with reference to first aspect, in the first possible implementation, method further include: in multiple assessments
There are the signal strength statistics of the time-domain signal of at least one assessment frequency point to be not less than power threshold in frequency point, then presses first day
Line connection type continues frequency band search.
The possible implementation of with reference to first aspect the first receives frequency range in the second possible implementation
The time-domain signal of each frequency point in interior multiple frequency points, and the time-domain signal based on multiple frequency points obtains synchronization signal；It is wherein adjacent
It include at least one frequency point in multiple frequency points between two assessment frequency points.
With reference to first aspect, the first possible, second of possible implementation of first aspect, the third can
In the implementation of energy, first antenna connection type is that frequency range is searched for by first antenna, and the second antenna links scenarios are to pass through
Second day line search frequency range outside first antenna.
The third possible implementation with reference to first aspect, in the fourth possible implementation, at first day
Under line connection type, main collection receiving channel is connect with first antenna, and diversity reception channel is connect with the second antenna；In the second antenna
Under connection type, main collection receiving channel is connect with the second antenna, and diversity reception channel is connect with first antenna.
With reference to first aspect, first aspect the first is possible, second it is possible, the third is possible, the 4th
The possible implementation of kind, in a fifth possible implementation, the signal for obtaining the time-domain signal of an assessment frequency point are strong
It to assess frequency point is the received signal strength in the pre-set bandwidths of center frequency point to obtain signal strength that degree statistic, which includes: statistics,
Statistic.
Second aspect provides a kind of frequency band search device, comprising: search module, for being received by first antenna connection type
The time-domain signal of frequency point is respectively assessed in multiple assessment frequency points in one frequency range, and obtains the signal of the time-domain signal of each assessment frequency point
Intensity statistics amount；Judgment module is connect with search module, the signal strength system of the time-domain signal for judging multiple assessment frequency points
Whether metering is respectively less than preset power threshold；Module is replaced, is connect with judgment module, for the time domain in multiple assessment frequency points
When the signal strength statistic of signal is respectively less than preset power threshold, it is changed to and re-starts frequency by the second antenna links scenarios
Section search.
In conjunction with the implementation of second aspect, in the first possible implementation, if judgment module is determined more
There are the signal strength statistics of the time-domain signal of at least one assessment frequency point to be not less than power threshold in a assessment frequency point, then searches
Rope module continues frequency search by first antenna connection type.
In conjunction with the first possible implementation of second aspect, in the second possible implementation, device is also wrapped
Synchronization module is included, for receiving the time-domain signal of each frequency point in multiple frequency points in frequency range, and the time-domain signal based on multiple frequency points
Obtain synchronization signal；It wherein include at least one frequency point in multiple frequency points between adjacent two assessment frequency points.
In conjunction with the first possible, second of possible implementation of second aspect, second aspect, the third can
In the implementation of energy, first antenna connection type is that frequency range is searched for by first antenna, and the second antenna links scenarios are to pass through
Second day line search frequency range outside first antenna.
In conjunction with the third possible implementation of second aspect, in the fourth possible implementation, at first day
Under line connection type, main collection receiving channel is connect with first antenna, and diversity reception channel is connect with the second antenna；In the second antenna
Under connection type, main collection receiving channel is connect with the second antenna, and diversity reception channel is connect with first antenna.
In conjunction with it is second aspect, second aspect the first is possible, second it is possible, the third is possible, the 4th
The possible implementation of kind, in a fifth possible implementation, search module is used for: statistics frequency centered on assessing frequency point
Received signal strength in the pre-set bandwidths of point is to obtain signal strength statistic.
The beneficial effect of the embodiment of the present invention is: by receiving multiple assessments in a frequency range by first antenna connection type
The time-domain signal of frequency point is respectively assessed in frequency point, and obtains the signal strength statistic of the time-domain signal of each assessment frequency point；Judge more
Whether the signal strength statistic of the time-domain signal of a assessment frequency point is respectively less than preset power threshold；In multiple assessment frequency points
When the signal strength statistic of time-domain signal is respectively less than preset power threshold, be changed to by the second antenna links scenarios again into
Row frequency band search is much smaller than the time of single frequency band search so that increased time-consuming only relies on the time-consuming of statistic, in this way,
Frequency band search time-consuming can be greatly decreased while not reducing robustness.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is the method schematic diagram of antenna switching in the prior art；
Fig. 2 is the flow diagram of the frequency band searching method of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the frequency band search device of first embodiment of the invention.
Fig. 4 is the structural schematic diagram of the frequency band search device of second embodiment of the invention.
Specific embodiment
The present invention is described in detail with embodiment with reference to the accompanying drawing.
It is the flow diagram of the frequency band searching method of the embodiment of the present invention referring firstly to Fig. 2, Fig. 2.Frequency band search
Whether exactly search in the frequency range has wireless communication signals.As shown in Fig. 2, frequency band searching method includes:
S10: the time domain letter that frequency point is respectively assessed in multiple assessment frequency points in a frequency range is received by first antenna connection type
Number, and obtain the signal strength statistic of the time-domain signal of each assessment frequency point.
Wherein, first antenna connection type is to search for frequency range by first antenna.Under first antenna connection type, main collection
Channel is connect with first antenna, and diversity channel is connect with the second antenna, i.e. the straight-through connection type of antenna.It is main for LTE system
Collection channel is responsible for receiving downlink and sends uplink LTE signal, and diversity channel is responsible for receiving downlink LTE signal, and total with gsm system
Antenna.For TD-SCDMA system, main collection channel be responsible for receive downlink and send uplink TD-SCDMA signal, diversity channel not by
Other modes occupy.
In embodiments of the present invention, assessment frequency point of several frequency points as frequency range in frequency range is generally equally spacedly chosen.
Spacing size usually with this frequency point carry out received signal strength (Received Signal Strength Indication,
RSSI the bandwidth) counted is related.It include multiple frequency points between two adjacent assessment frequency points.
S11: judge whether the signal strength statistic of the time-domain signal of multiple assessment frequency points is respectively less than preset power door
Limit.
Wherein the signal strength statistic of time-domain signal is exactly antenna opening (antenna port) power.For LTE system,
Antenna opening power is to count to assess frequency point as the received signal strength (Received of the 1.08M bandwidth signal of center frequency point
Signal Strength Indication, RSSI), and obtained after being converted.For TD-SCDMA system, antenna opening power
To receive to assess frequency point as the time-domain signal in the 1.28M bandwidth of center frequency point, frame synchronization is carried out, descending pilot frequency time slot is obtained
The received signal strength of signal obtains after being converted.200KHz is divided between the adjacent frequency of TD-SCDMA system.
S12: when the signal strength statistic of the time-domain signal of multiple assessment frequency points is respectively less than preset power threshold, more
It is changed to and re-starts frequency band search by the second antenna links scenarios.
Second antenna links scenarios be by first antenna outside second day line search frequency range.In the second antenna links scenarios
Under, main collection channel is connect with the second antenna, and diversity channel is connect with first antenna, i.e. antenna cross-connection system.In the present invention
Other embodiments in, can also using first antenna connection type as antenna interconnection, the second antenna links scenarios be antenna it is straight
Logical connection type.
Third generation partner program (3rd Generation Partnership Project, 3GPP) is in 3GPP LTE
System has 504 Physical Cell Identifier, is divided into 168 different groups, every group of 3 different cells.
WhereinFor Physical Cell Identifier,Indicate that group number, range are 0~167,Number, range in expression group
It is 0~2.Therefore each Physical Cell IdentifierCorresponding only one group numberWith number in groupLTE
System utilizes PSS (Primary Synchronization Signal, primary synchronization signal) and SSS (Secondary
Synchronization Signal, secondary synchronization signal) complete cell searching.PSS frequency-region signal byIt uniquely determines, totally 3
It is a.SSS frequency-region signal byAnd half frame position (preceding field or rear field) where SSS signal determines, for fixation
'sAnd half frame position where SSS signal, SSS signal totally 168.The process that terminal carries out frequency band search is as follows: receiving
Time-domain signal, the time domain interference for synchronizing signal to received time-domain signal are eliminated；Time-domain signal after being eliminated using interference
And the PSS signal (totally 3 sequences) locally prestored detects PSS signal sync bit, while can detecte out corresponding
And the estimated value of frequency deviation can be obtained；Synchronization is extracted from time-domain received signal based on the PSS signal sync bit detected before
Signal, carry out frequency offset correction simultaneously carry out SSS detection, obtain cell ID, frame synchronization position, cyclic prefix (Cyclic Prefix,
CP) type (being divided into short CP and long CP, short CP is denoted as NCP, and long CP is denoted as ECP).
When frequency band search, there are the signal strength systems of the time-domain signal of at least one assessment frequency point in multiple assessment frequency points
Metering is not less than power threshold, then continues frequency band search by first antenna connection type, i.e. multiple frequency points in reception frequency range
In each frequency point time-domain signal, and the time-domain signal based on multiple frequency points obtains synchronization signal；Until the frequency band search of the frequency range
Terminate.It wherein include at least one frequency point in multiple frequency points between adjacent two assessment frequency points.
The judgement of the embodiment of the present invention only relies on the statistic of existing frequency band search scheme, when not needing antenna switching, no
It is time-consuming to increase frequency band search.When antenna being needed to switch, increased time-consuming only relies on the time-consuming of statistic, and it is frequently much smaller than single
The time of section search.Therefore frequency band search time-consuming can be greatly decreased while not reducing robustness.
The frequency band searching method of the embodiment of the present invention is that each frequency range individually carries out, i.e., whether need to switch over is every
What a frequency range was individually handled, the search of next frequency range is carried out again after completing the search of a frequency range, and judges whether to need again
Antenna links scenarios are replaced to carry out frequency band search.
Fig. 3 is the structural schematic diagram of the frequency band search device of first embodiment of the invention.As shown in figure 3, frequency band search fills
Setting 10 includes: search module 11, judgment module 12 and replacement module 13.Search module 11 is used to press first antenna connection type
It receives in multiple assessment frequency points in a frequency range and respectively assesses the time-domain signal of frequency point, and obtain the time-domain signal of each assessment frequency point
Signal strength statistic.Judgment module 12 is connect with search module 11, the letter of the time-domain signal for judging multiple assessment frequency points
Whether number intensity statistics amount is respectively less than preset power threshold.Replacement module 13 is connect with judgment module 12, for multiple each
When the signal strength statistic of the time-domain signal of assessment frequency point is respectively less than preset power threshold, it is changed to and is connected by the second antenna
Mode search module 11 re-starts frequency band search.
Wherein, first antenna connection type is to search for frequency range by first antenna.Under first antenna connection type, main collection
Receiving channel is connect with first antenna, and diversity reception channel is connect with the second antenna, i.e. the straight-through connection type of antenna.For
LTE system, main collection channel are responsible for receiving downlink and send uplink LTE signal, and diversity channel is responsible for receiving downlink LTE signal, and
With GSM shared antenna.For TD-SCDMA system, main collection channel is responsible for receiving downlink and sends uplink TD-SCDMA signal, diversity
Channel is not occupied by other moulds.Second antenna links scenarios be by first antenna outside second day line search frequency range.Second
Under antenna links scenarios, main collection receiving channel is connect with the second antenna, and diversity reception channel is connect with first antenna, i.e., antenna is handed over
Fork connection.Specifically, for LTE system, diversity channel is responsible for receiving downlink and sends uplink LTE signal.For TD-SCDMA
System, diversity channel are responsible for receiving downlink and send uplink TD-SCDMA signal.
In embodiments of the present invention, assessment frequency point of several frequency points as frequency range in frequency range is generally equally spacedly chosen.
Spacing size is usually related with the bandwidth of received signal strength statistics is carried out in this frequency point.Include between two neighboring assessment frequency point
Multiple frequency points.When frequency band search, search module 11 is used for: statistics is to assess frequency point as the reception in the pre-set bandwidths of center frequency point
Signal strength is to obtain signal strength statistic.If judgment module 12 determines in multiple assessment frequency points, there are at least one to comment
The signal strength statistic of the time-domain signal of frequency point is estimated not less than preset power threshold, then search module 11 is connected by first antenna
The mode of connecing continues frequency search, until the frequency band search of the frequency range terminates.Device further includes synchronization module 14, for receiving
In frequency range in multiple frequency points each frequency point time-domain signal, and the time-domain signal based on multiple frequency points obtains synchronization signal；Wherein phase
It include at least one frequency point in multiple frequency points between two adjacent assessment frequency points.The judgement of the embodiment of the present invention only relies on existing
The statistic of frequency band search scheme when not needing antenna switching, does not increase frequency band search time-consuming.When antenna being needed to switch, increase
Time-consuming only rely on the time-consuming of statistic, and its time for being much smaller than single frequency band search.Therefore robustness can not reduced
While, frequency band search time-consuming is greatly decreased.
In embodiments of the present invention, frequency band search device 10 can be applied to LTE system, and wherein antenna opening power is search
Module statistical estimation frequency point is the received signal strength of the 1.08M bandwidth signal of center frequency point, and obtains after being converted.Frequency range
Searcher 10 also can be applied to TD-SCDMA, and wherein antenna opening power is that search module receives the frequency centered on assessing frequency point
Time-domain signal in the 1.28M bandwidth of point carries out frame synchronization, obtains the received signal strength of descending pilot frequency time slot signal, carries out
It is obtained after conversion.200KHz is divided between the adjacent frequency of TD-SCDMA system.
In above embodiments provided by the present invention, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the module or unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It may be combined or can be integrated into another device, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.The unit as illustrated by the separation member can be or
It may not be and be physically separated, component shown as a unit may or may not be physical unit, it can
It is in one place, or may be distributed over multiple network units.Part therein can be selected according to the actual needs
Or whole units achieve the purpose of the solution of this embodiment.In addition, each functional unit in each embodiment of the present invention can
To be integrated in a processing unit, it is also possible to each unit and physically exists alone, it can also be with two or more units
It is integrated in one unit.Above-mentioned integrated unit both can take the form of hardware realization, can also use software function list
The form of member is realized.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
It is each that equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute the present invention
The all or part of the steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk
Etc. the various media that can store program code.
Fig. 4 is the structural schematic diagram of the frequency band search device of second embodiment of the invention.As shown in figure 4, frequency band search fills
Setting 20 includes: transceiver 21, processor 22, memory 23 and data/address bus 24, wherein receiver 21, processor 22 and is deposited
Reservoir 23 is connect with data/address bus 24 respectively, to carry out data interaction by data/address bus 24.It include processor in memory 23
Necessary drive software needed for 22 operations, so that processor 22 works under software effect.
Transceiver 21 by first antenna connection type receive a frequency range in multiple assessment frequency points in respectively assess frequency point when
Domain signal, and obtain the signal strength statistic of the time-domain signal of each assessment frequency point.Processor 22 judges multiple assessment frequency points
Whether the signal strength statistic of time-domain signal is respectively less than preset power threshold.And in the time-domain signal of multiple each assessment frequency points
Signal strength statistic when being respectively less than preset power threshold, processor 22 exports indication signal to transceiver 21, transceiver
It is changed to according to indication signal and re-starts frequency band search by the second antenna links scenarios.The frequency band search of specific transceiver 21
The description of embodiment of the method before process can refer to.
First antenna connection type is to search for frequency range by first antenna.Under first antenna connection type, main collection is received
Channel is connect with first antenna, and diversity reception channel is connect with the second antenna, i.e. the straight-through connection type of antenna.For LTE system
System, main collection channel are responsible for receiving downlink and send uplink LTE signal, and diversity channel is responsible for receiving downlink LTE signal, and and GSM
Shared antenna.For TD-SCDMA system, main collection channel is responsible for receiving downlink and sends uplink TD-SCDMA signal, and diversity channel is not
It is occupied by other moulds.Second antenna links scenarios be by first antenna outside second day line search frequency range.Connect in the second antenna
It connects under mode, main collection receiving channel is connect with the second antenna, and diversity reception channel is connect with first antenna, i.e., antenna, which intersects, connects
It connects.Specifically, for LTE system, diversity channel is responsible for receiving downlink and sends uplink LTE signal.For TD-SCDMA system,
It is responsible for receiving downlink and sends uplink TD-SCDMA signal in diversity channel.
In embodiments of the present invention, assessment frequency point of several frequency points as frequency range in frequency range is generally equally spacedly chosen.
Spacing size is usually related with the bandwidth of received signal strength statistics is carried out in this frequency point.Include between two neighboring assessment frequency point
Multiple frequency points.When frequency band search, the statistics of transceiver 21 is strong as the reception signal in the pre-set bandwidths of center frequency point to assess frequency point
Degree is to obtain signal strength statistic.If processor 22 determines in multiple assessment frequency points, there are at least one assessment frequency points
The signal strength statistic of time-domain signal is not less than preset power threshold, then further instruction transceiver 21 is connected by first antenna
The mode of connecing continues frequency search, until the frequency band search of the frequency range terminates.Transceiver 21 also receives multiple frequency points in frequency range
In each frequency point time-domain signal, and the time-domain signal based on multiple frequency points obtains synchronization signal；Wherein adjacent two assessment frequencies
It include at least one frequency point in multiple frequency points between point.The judgement of the embodiment of the present invention only relies on existing frequency band search scheme
Statistic when not needing antenna switching, does not increase frequency band search time-consuming.When antenna being needed to switch, increased time-consuming only relies on system
The time-consuming of metering, and its time for being much smaller than single frequency band search.Therefore it can be greatly decreased while not reducing robustness
Frequency band search is time-consuming.
Frequency band search device 20 can be applied to LTE system, and wherein antenna opening power is search module statistical estimation frequency point
For the received signal strength of the 1.08M bandwidth signal of center frequency point, and obtained after being converted.Frequency band search device 20 can also be with
Applied to TD-SCDMA, wherein antenna opening power is that search module is received to assess frequency point as in the 1.28M bandwidth of center frequency point
Time-domain signal, carry out frame synchronization, obtain the received signal strength of descending pilot frequency time slot signal, obtained after being converted.TD-
200KHz is divided between the adjacent frequency of SCDMA system.
Frequency band searching method of the invention is that each frequency range individually carries out, i.e., whether need to switch over is each frequency range
It individually handles, carries out the search of next frequency range again after completing the search of a frequency range, and judge whether to need replacing again
Antenna links scenarios carry out frequency band search.
In conclusion the present invention respectively assesses the time-domain signal of frequency point by receiving a frequency range by first antenna connection type,
And statistic is obtained, judge that frequency range respectively assesses the antenna opening power of frequency point and whether is less than preset power threshold based on statistic,
And when the antenna opening power that frequency range respectively assesses frequency point is less than preset power threshold, the second antenna links scenarios are changed to weight
It is new to carry out frequency band search, so that increased time-consuming only relies on the time-consuming of statistic, it is much smaller than the time of single frequency band search, such as
This, can be greatly decreased frequency band search time-consuming while not reducing robustness.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (28)
1. a kind of frequency band searching method, which is characterized in that the described method includes:
The time-domain signal of the assessment frequency point in the first frequency range is received by first antenna connection type, and is obtained in first frequency range
Assessment frequency point time-domain signal signal strength statistic；
Judge whether the signal strength statistic of the time-domain signal of the assessment frequency point in first frequency range is less than preset power
Thresholding；
When the signal strength statistic of the time-domain signal of assessment frequency point in first frequency range is less than preset power threshold,
It is changed to and carries out frequency band search in first frequency range again by the second antenna links scenarios.
2. the method according to claim 1, wherein the method also includes:
When the signal strength statistic of the time-domain signal of assessment frequency point in first frequency range is not less than the power threshold,
Continue to carry out frequency band search in first frequency range by the first antenna connection type.
3. a kind of frequency band searching method, which is characterized in that the described method includes:
The time-domain signal of the assessment frequency point in the first frequency range is received by first antenna connection type, and is obtained in first frequency range
Assessment frequency point time-domain signal signal strength statistic；
Judge whether the signal strength statistic of the time-domain signal of the assessment frequency point in first frequency range is less than preset power
Thresholding；
When the signal strength statistic of the time-domain signal of assessment frequency point in first frequency range is not less than the power threshold,
Continue to carry out frequency band search in first frequency range by the first antenna connection type.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
When the signal strength statistic of the time-domain signal of assessment frequency point in first frequency range is less than preset power threshold,
It is changed to and carries out frequency band search in first frequency range again by the second antenna links scenarios.
5. a kind of frequency band searching method, which is characterized in that the described method includes:
The time-domain signal of the assessment frequency point in the first frequency range is received by first antenna connection type, and is obtained in first frequency range
Assessment frequency point time-domain signal signal strength statistic；
According to the signal strength statistic of the time-domain signal of the assessment frequency point in first frequency range and preset power door
Limit, judges whether to need replacing antenna links scenarios, to carry out frequency band search in first frequency range.
6. according to the method described in claim 5, it is characterized in that, described judge whether to need replacing antenna links scenarios, packet
It includes:
When the signal strength statistic of the time-domain signal of assessment frequency point in first frequency range is not less than the power threshold,
By the first antenna connection type, continuation carries out frequency band search in first frequency range.
7. according to the method described in claim 5, it is characterized in that, described judge whether to need replacing antenna links scenarios, packet
It includes:
When the signal strength statistic of the time-domain signal of assessment frequency point in first frequency range is less than the power threshold, more
It is changed to by second antenna links scenarios, carries out frequency band search in first frequency range again.
8. method according to claim 1-7, which is characterized in that the method also includes:
According to the signal strength statistic and preset power threshold of the time-domain signal of the assessment frequency point in the second frequency range, sentence again
It is disconnected whether to need replacing antenna links scenarios, to carry out frequency band search in second frequency range.
9. method according to claim 1-8, which is characterized in that the frequency band search includes:
Receive the time-domain signal of each frequency point in multiple frequency points in first frequency range, and the time-domain signal based on the multiple frequency point
Obtain synchronization signal；Wherein, including at least one frequency point in the multiple frequency point between adjacent two assessment frequency points.
10. -9 described in any item methods according to claim 1, it is characterised in that:
The first antenna connection type is to search for first frequency range by first antenna, and second antenna links scenarios are
First frequency range described in line search in second day outside by first antenna.
11. -10 described in any item methods according to claim 1, it is characterised in that:
Under the first antenna connection type, main collection receiving channel is connect with first antenna, diversity reception channel and the second antenna
Connection；
Under second antenna links scenarios, the main collection receiving channel is connect with second antenna, the diversity reception
Channel is connect with the first antenna.
12. -11 described in any item methods according to claim 1, which is characterized in that obtain the time-domain signal of an assessment frequency point
Signal strength statistic include:
Statistics is using the assessment frequency point as the received signal strength in the pre-set bandwidths of center frequency point, to obtain the signal strength
Statistic.
13. a kind of frequency band search device, which is characterized in that described device includes:
Processor and memory；Wherein, the processor is used to execute the program instruction in the memory, to realize that right is wanted
Seek any method of 1-12.
14. a kind of frequency band search device, which is characterized in that described device includes:
The interface of processor and data/address bus；Wherein, the processor is coupled by the interface of the data/address bus with memory,
And the program instruction in the memory is executed, to realize any method of claim 1-12.
15. a kind of computer readable storage medium, it is characterised in that:
Program instruction is stored in the computer readable storage medium, described program instruction can be held by the processor of computer
Row, to realize any method of claim 1-12.
16. a kind of computer software product, it is characterised in that:
It include program instruction in the computer program product, described program instruction can be executed by the processor of computer, with
Realize any method of claim 1-12.
17. a kind of frequency band search device, which is characterized in that described device includes:
For receiving the time-domain signal of the assessment frequency point in the first frequency range by first antenna connection type, and obtain first frequency
The module of the signal strength statistic of the time-domain signal of assessment frequency point in section；
For judging it is preset whether the signal strength statistic of the time-domain signal of the assessment frequency point in first frequency range is less than
The module of power threshold；
The signal strength statistic of time-domain signal for the assessment frequency point in first frequency range is less than preset power door
In limited time, it is changed to the module for carrying out frequency band search in first frequency range again by the second antenna links scenarios.
18. device according to claim 17, which is characterized in that described device further include:
The signal strength statistic of time-domain signal for the assessment frequency point in first frequency range is not less than the power door
In limited time, continue the module that frequency band search is carried out in first frequency range by the first antenna connection type.
19. a kind of frequency band search device, which is characterized in that described device includes:
For receiving the time-domain signal of the assessment frequency point in the first frequency range by first antenna connection type, and obtain first frequency
The module of the signal strength statistic of the time-domain signal of assessment frequency point in section；
For judging it is preset whether the signal strength statistic of the time-domain signal of the assessment frequency point in first frequency range is less than
The module of power threshold；
The signal strength statistic of time-domain signal for the assessment frequency point in first frequency range is not less than the power door
In limited time, continue the module that frequency band search is carried out in first frequency range by the first antenna connection type.
20. device according to claim 19, which is characterized in that described device further include:
The signal strength statistic of time-domain signal for the assessment frequency point in first frequency range is less than preset power door
In limited time, it is changed to the module for carrying out frequency band search in first frequency range again by the second antenna links scenarios.
21. a kind of frequency band search device, which is characterized in that described device includes:
For receiving the time-domain signal of the assessment frequency point in the first frequency range by first antenna connection type, and obtain first frequency
The module of the signal strength statistic of the time-domain signal of assessment frequency point in section；
For according in first frequency range assessment frequency point time-domain signal signal strength statistic and preset power
Thresholding judges whether to need replacing antenna links scenarios, to carry out the module of frequency band search in first frequency range.
22. device according to claim 21, which is characterized in that described device further include:
The signal strength statistic of time-domain signal for the assessment frequency point in first frequency range is not less than the power door
In limited time, by the first antenna connection type, continue the module that frequency band search is carried out in first frequency range.
23. device according to claim 21, which is characterized in that described device further include:
The signal strength statistic of time-domain signal for the assessment frequency point in first frequency range is less than the power threshold
When, it is changed to by second antenna links scenarios, carries out frequency band search in first frequency range again.
24. the described in any item devices of 7-23 according to claim 1, which is characterized in that described device further include:
For the signal strength statistic and preset power threshold according to the time-domain signal for assessing frequency point in the second frequency range, weight
Newly judge whether to need replacing antenna links scenarios, to carry out the module of frequency band search in second frequency range.
25. the described in any item devices of 7-24 according to claim 1, which is characterized in that described device further include:
For receiving the time-domain signal of each frequency point in multiple frequency points in the frequency range, and the time-domain signal based on the multiple frequency point
Obtain the module of synchronization signal；It wherein, include at least one of the multiple frequency point frequency between adjacent two assessment frequency points
Point.
26. the described in any item devices of 7-25 according to claim 1, it is characterised in that:
The first antenna connection type is to search for first frequency range by first antenna, and second antenna links scenarios are
First frequency range described in line search in second day outside by first antenna.
27. the described in any item devices of 7-26 according to claim 1, it is characterised in that:
Under the first antenna connection type, main collection receiving channel is connect with first antenna, diversity reception channel and the second antenna
Connection；
Under second antenna links scenarios, the main collection receiving channel is connect with second antenna, the diversity reception
Channel is connect with the first antenna.
28. the described in any item devices of 7-27 according to claim 1, it is characterised in that:
It is described for receiving the time-domain signal of the assessment frequency point in the first frequency range by first antenna connection type, and obtain described the
The module of the signal strength statistic of the time-domain signal of assessment frequency point in one frequency range, is used for:
Statistics is using the assessment frequency point as the received signal strength in the pre-set bandwidths of center frequency point, to obtain the signal strength
Statistic.
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| CN201811321200.1A CN109348524B (en) | 2015-06-26 | 2015-06-26 | Frequency band searching method and device |
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| CN201811321200.1A CN109348524B (en) | 2015-06-26 | 2015-06-26 | Frequency band searching method and device |
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| CN102158933B (en) * | 2010-02-11 | 2014-01-22 | 富士通株式会社 | Method and device for frequency band searching in TDD-LTE (Time Division Duplex-Long Term Evolution) system |
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| CN101202561A (en) * | 2007-12-18 | 2008-06-18 | 中兴通讯股份有限公司 | System and method for searching signal |
| CN103533605A (en) * | 2012-07-04 | 2014-01-22 | 中国移动通信集团公司 | Frequency sweeping method and device of user terminal |
| CN103841597A (en) * | 2012-11-27 | 2014-06-04 | 联芯科技有限公司 | Frequency point scanning method and device for TD-SCDMA system |
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| CN105101353B (en) | 2018-11-30 |
| CN109348524B (en) | 2022-11-22 |
| CN105101353A (en) | 2015-11-25 |
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