CN103533605B - The frequency sweeping method and device of a kind of user terminal - Google Patents
The frequency sweeping method and device of a kind of user terminal Download PDFInfo
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- CN103533605B CN103533605B CN201210230168.2A CN201210230168A CN103533605B CN 103533605 B CN103533605 B CN 103533605B CN 201210230168 A CN201210230168 A CN 201210230168A CN 103533605 B CN103533605 B CN 103533605B
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Abstract
This application discloses a kind of frequency sweeping method of user terminal and device, methods described includes：When the effective frequency of history in all frequency ranges to be searched is invalid frequency, effective frequency is searched in each described frequency range to be searched according to the search priority pre-set successively；One effective frequency of selection is as the currently active frequency from effective frequency where the first effective frequency searched in frequency range to be searched.Compared to the prior art, the frequency sweeping method and device of user terminal proposed by the present invention, can shorten the frequency sweep time of user terminal, improve the frequency sweep efficiency of user terminal.
Description
Technical field
The application is related to mobile communication technology, the frequency sweeping method and device of more particularly to a kind of user terminal.
Background technology
When user terminal is first in public land mobile network（Public Land Mobile Network, PLMN）In enter
During row frequency sweep, the user terminal is searched for according to the frequency sweep order and sweep interval that pre-set in the frequency range that itself is supported to be had
Imitate frequency, i.e. received signal strength indicator（Received Signal Strength Indication, RSSI）Measured value is more than
The frequency of predetermined threshold value, when user terminal searches effective frequency, user terminal will select one of those effective frequency to enter
Row is resident.In addition, in order that rssi measurement value can be faster searched for more than default in frequency sweep next time by obtaining user terminal
Effective frequency of threshold value, user terminal needs to be stored in the effective frequency searched in this frequency sweep.Wherein, it is above-mentioned whole by user
The effective frequency preserved is held, the effective frequency of history can be referred to as.
Fig. 1 is the implementation process figure of the frequency sweeping method of user terminal in the prior art.As shown in figure 1, including as described below
The step of：
Step 101：A frequency range is selected to be used as current search from each frequency range to be searched according to fixed frequency sweep order
Frequency range.
Step 102：Judge whether include the effective frequency of history in current frequency range to be searched；If so, performing step 103；It is no
Then, step 106 is performed.
Step 103：Rssi measurement is carried out respectively to the effective frequency of each history in current frequency range to be searched, each is obtained
The rssi measurement value of the effective frequency of history.
In this step, user terminal can first read the effective frequency of each history in current frequency range to be searched, then
Rssi measurement is carried out respectively to the effective frequency of each history in current frequency range to be searched, obtains each in current frequency range to be searched
The rssi measurement value of the individual effective frequency of history.
Step 104：Judge whether there is the effective frequency of at least one history to be effective frequency in current frequency range to be searched；If
It is to perform step 105；Otherwise, step 106 is performed.
Because the effective frequency of each history under current communication condition, preserved by user terminal is possible to still be effective
Frequency（I.e. rssi measurement value is more than the frequency of predetermined threshold value）, it is also possible to as invalid frequency（I.e. rssi measurement value be less than or
Equal to the frequency of predetermined threshold value）, therefore, in this step, user terminal will judge each in current frequency range to be searched successively
Whether the rssi measurement value of the effective frequency of history is more than predetermined threshold value, so as to be informed in each history in current frequency range to be searched
Whether there is the effective frequency of at least one history to be effective frequency in effective frequency.If each in current frequency range to be searched
The rssi measurement value for having the effective frequency of any one history in the effective frequency of history is more than predetermined threshold value, then explanation also has at least one
The individual effective frequency of history is effective frequency, therefore can perform step 105；And if history all in current frequency range to be searched has
The rssi measurement value of effect frequency is respectively less than or equal to predetermined threshold value, then illustrates the effective frequencies of history all in current frequency range to be searched
Point is invalid frequency, now, will perform step 106.
Step 105：One history of selection is effective in the effective frequency of history from all rssi measurement values more than predetermined threshold value
Frequency terminates whole flow process as the currently active frequency.
Step 106, judge whether each frequency range to be searched is searched finishing；If so, performing step 107；Otherwise, return
Perform step 101.
Step 107：Searched for successively in each frequency range to be searched according to fixed frequency sweep order and fixed sweep interval
Effective frequency, and select an effective frequency to be used as the currently active frequency from the effective frequency searched.
By above-mentioned step 101~107, user terminal can obtain the currently active frequency from frequency range to be searched.
However, with the development of mobile communication technology, the frequency range that user terminal is supported can be constantly increasing, each frequency range
Bandwidth also can be improved constantly.For example, in 3-G (Generation Three mobile communication system), TD SDMA（Time
Division-Synchronous Code Division Multiple Access, TD-SCDMA）The channel width of system is
1.6MHz；And close in forth generation GSM, Long Term Evolution（Long Term Evolution, LTE）System
Channel width then has increased to 20MHz.Further, since there is the frequency portion of oneself in each operator in the PLMN each runed
Administration's strategy, i.e., the frequency quantity and frequency position that each operator is disposed in the PLMN each runed is not quite similar, and
User terminal can not learn the frequency deployment strategy for the frequency range itself supported, therefore, in the frequency sweeping method of existing user terminal
In, when the effective frequency of history in all frequency ranges to be searched is invalid frequency（I.e. user terminal is to be searched what is pre-saved
Obtained rssi measurement value is measured on the effective frequency of whole history in frequency range to be respectively less than or equal to predetermined threshold value）When, user is whole
End will perform step 107, i.e., effective frequency is re-searched in frequency range to be searched.Now, user terminal is typically all according to existing
There is frequency sweep order specified in agreement to be scanned for successively to each frequency range to be searched.In addition, user terminal is to be searched at each
When the inside of frequency range is scanned for, in order to prevent omitting the currently active frequency that rssi measurement value is more than predetermined threshold value in search
Point, user terminal is typically all according to sweep interval specified in existing protocol（For example, 100KHz）In current search frequency range
Search for the currently active frequency.
During the present invention is realized, inventor has found that at least there are the following problems in the prior art：
In step 107 in the frequency sweeping method of above-mentioned user terminal, because user terminal enters to each frequency range to be searched
Row search when frequency sweep order be changeless, even if therefore when in the frequency range to be searched of frequency sweep front be not present history
During effective frequency, user terminal still will be scanned for according to above-mentioned changeless frequency sweep order to each frequency range to be searched.
Because the probability that effective frequency is searched in the frequency range to be searched in the absence of the effective frequency of history is general all very low, therefore user
The search of the above-mentioned frequency range to be searched in the absence of the effective frequency of history of terminal-pair will take substantial amounts of search time, and be difficult to search for
To effective frequency, so as to considerably increase the frequency sweep time of user terminal, the frequency sweep efficiency of user terminal is reduced.
Further, because in the frequency range to be searched of part, the distribution of effective frequency is general than sparse（For example, most
Closely-spaced is 20MHz）, but in the frequency sweeping method of existing user terminal, user terminal is in the frequency range to be searched of above-mentioned part
When scanning for, used sweep interval is still minimum sweep interval 100KHz specified in existing protocol, therefore also will
The frequency sweep time of user terminal is greatly increased, the frequency sweep efficiency of user terminal is reduced.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of frequency sweeping method of user terminal, user can be shortened
The frequency sweep time of terminal, improve the frequency sweep efficiency of user terminal.
Another object of the present invention is to provide a kind of frequency-sweeping apparatus of user terminal, the frequency sweep of user terminal can be shortened
Time, improve the frequency sweep efficiency of user terminal.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of frequency sweeping method of user terminal, methods described includes：
It is preferential according to the search pre-set when the effective frequency of history in all frequency ranges to be searched is invalid frequency
Level searches for effective frequency in each described frequency range to be searched successively；
An effective frequency is selected from effective frequency where the first effective frequency searched in frequency range to be searched
It is used as the currently active frequency.
A kind of frequency-sweeping apparatus of user terminal, including：Search unit and selecting unit；
The search unit, for when the effective frequency of history in all frequency ranges to be searched is invalid frequency, according to
The search priority pre-set searches for effective frequency in each described frequency range to be searched successively, by the effective frequency searched
Notify to selecting unit；
The selecting unit, for from effective frequency where the first effective frequency searched in frequency range to be searched
One effective frequency of selection is used as the currently active frequency.
Therefore, in the inventive solutions, when the effective frequency of history in all frequency ranges to be searched is nothing
When imitating frequency, each frequency range to be searched will be scanned for successively according to the search priority pre-set, rather than according to existing
Have fixed specified in agreement frequency sweep order each frequency range to be searched is scanned for successively, therefore operator frequency dispose
In the case that strategy change is little, user terminal can as soon as possible be searched according to the search priority of each frequency range to be searched works as
Preceding effective frequency, so as to effectively shorten the frequency sweep time of user terminal, improves the frequency sweep efficiency of user terminal.
Brief description of the drawings
Fig. 1 is the implementation process figure of the frequency sweeping method of user terminal in the prior art.
Fig. 2 is the implementation process figure of the frequency sweeping method of user terminal of the present invention.
Fig. 3 sets the method flow diagram of search priority for the present invention.
Fig. 4 is present invention determine that the method flow diagram of the sweep interval corresponding with each frequency range to be searched.
Fig. 5 is the implementation process figure of the first embodiment of the invention.
Fig. 6 is the implementation process figure of second of embodiment of the invention.
Fig. 7 is the searcher structural representation of user terminal of the present invention.
Embodiment
For problems of the prior art, a kind of frequency sweep scheme of the user terminal after improvement is proposed in the present invention,
The frequency sweep efficiency of user terminal can be improved.
To make technical scheme clearer, clear, develop simultaneously embodiment referring to the drawings, to of the present invention
Scheme is described in further detail.
Fig. 2 is the implementation process figure of the frequency sweeping method of user terminal of the present invention.As shown in Fig. 2 including step as described below
Suddenly：
Step 201：When the effective frequency of history in all frequency ranges to be searched is invalid frequency, according to what is pre-set
Search priority searches for effective frequency in each frequency range to be searched successively.
In a particular embodiment of the present invention, the frequency range to be searched refers in the frequency range that user terminal itself is supported not
Searched frequency range；The effective frequency of history refers to the effective frequency preserved before this frequency sweep by user terminal, i.e.,
Rssi measurement value is more than the frequency of predetermined threshold value；The invalid frequency refers to that rssi measurement value is less than or equal to the frequency of predetermined threshold value
Point.
In this step, when the effective frequency of history in all frequency ranges to be searched is invalid frequency, user terminal will
Each frequency range to be searched is scanned for successively according to the search priority pre-set, to search effective frequency.
For example, it is assumed that user terminal supports 3 frequency ranges：A frequency ranges, B frequency ranges and C frequency ranges, and the search of 3 frequency ranges is excellent
First level is respectively middle and high, low.Then in this step, user terminal will be searched in search priority highest B frequency ranges and had first
Frequency is imitated, when user terminal at least searches an effective frequency in B frequency ranges, step 202 is performed；When user terminal is in B
When not searching effective frequency in frequency range, user terminal will be scanned for then in the A frequency ranges during search priority is, when
When user terminal at least searches an effective frequency in A frequency ranges, step 202 is performed；When user terminal does not have in A frequency ranges yet
When searching effective frequency, user terminal will finally be scanned in the minimum C frequency ranges of search priority, work as user terminal
When an effective frequency is at least searched in C frequency ranges, step 202 is performed；And when user terminal is not searched in C frequency ranges
During effective frequency, then it can terminate whole search routine.
In addition, in the preferred embodiment, having when in the effective frequency of each history in all frequency ranges to be searched
When the effective frequency of at least one history is effective frequency, then the history that directly can be more than predetermined threshold value from all rssi measurement values has
Imitate and an effective frequency of history is selected in frequency as the currently active frequency, and terminate whole search routine.
Step 202：One is selected from effective frequency in the frequency range where the first effective frequency searched effectively
Frequency is used as the currently active frequency.
Specifically, if user terminal is carried out to each frequency range to be searched successively according to the search priority pre-set
Search, and when searching at least one effective frequency, then in this step, user terminal will be effective frequently from first searched
One effective frequency of selection is used as the currently active frequency in effective frequency in frequency range where point.
For example, it is assumed that user terminal supports 3 frequency ranges：A frequency ranges, B frequency ranges and C frequency ranges, and user terminal is searched in B frequency ranges
Rope assumes that user terminal has searched 3 effective frequencies altogether in B frequency ranges to first effective frequency, then user terminal
Directly from 3 effective frequencies in the B frequency ranges an effective frequency will be selected to be used as the currently active frequency.
In addition, in the preferred embodiment, when user terminal searches first effective frequency, and to first
Current frequency range to be searched where effective frequency（For example, above-mentioned B frequency ranges）After scanning for, it will stop to treating for not searching for
Search for frequency range（For example, above-mentioned A frequency ranges and C frequency ranges）Scan for, and can terminate whole after the currently active frequency is selected
Search routine.
It is preferred that user terminal can be selected from effective frequency in the frequency range where the first effective frequency searched
The maximum effective frequency of rssi measurement value is selected as the currently active frequency.For example, it is assumed that user terminal searches in B frequency ranges
One effective frequency, and assume that user terminal has searched 3 effective frequencies altogether in B frequency ranges, then user terminal is from described 3
The effective frequency for selecting rssi measurement value maximum in individual effective frequency is used as the currently active frequency.
Preferably, in the specific embodiment of invention, before above-mentioned steps 201, user terminal also needs to pre-set
Each search priority of frequency range to be searched in this frequency sweep.
Fig. 3 sets the method flow diagram of search priority for the present invention.As shown in figure 3, including step as described below：
Step 301：Count the quantity of the effective frequency of history in each frequency range to be searched.
Preferably, in a particular embodiment of the present invention, user terminal can set many in the effective frequency of preservation history
Individual bit（bit）, and represent with the value of each bit the frequency range to be searched belonging to the effective frequency of the history.Therefore, exist
In this step, user terminal can judge every according to the bit for the frequency range to be searched belonging to representing the effective frequency of history
Frequency range to be searched belonging to the individual effective frequency of history, and then the number of the effective frequency of history in each frequency range to be searched can be counted
Amount.
Step 302：According to the quantity of the effective frequency of history in predetermined number and each frequency range to be searched, each is treated
Search frequency range is set to the effective frequency range of history or the invalid frequency range of history.
Preferably, in this step, user terminal the quantity of the effective frequency of history can be more than predetermined number wait search
Rope frequency range is set to the effective frequency range of history；The frequency range to be searched that the quantity of the effective frequency of history is less than or equal to predetermined number is set
It is set to the invalid frequency range of history.It is preferred that in a particular embodiment of the present invention, predetermined number can be set to 1 by user terminal,
Therefore in this step, the frequency range to be searched that the quantity of the effective frequency of history is more than 1 can be set to history by user terminal has
Imitate frequency range；The frequency range to be searched that the quantity of the effective frequency of history is less than or equal to 1 is set to the invalid frequency range of history.
For example, it is assumed that user terminal supports that 3 frequency ranges are respectively A frequency ranges, B frequency ranges and C frequency ranges, also assume that in A frequency ranges
The quantity of the effective frequency of history be 2, the quantity of the effective frequency of history in B frequency ranges is that the history in 3, C frequency ranges is effective
The quantity of frequency is 1, and assumes that the predetermined number is 1.Then in this step, user terminal can be by A frequency ranges and B frequency ranges
The effective frequency range of history is respectively set to, C frequency ranges are set to the invalid frequency range of history.
Step 303：It is the effective frequency range of each history according to the quantity of the effective frequency of history in the effective frequency range of each history
Corresponding search priority is set.
In this step, user terminal can be according to the quantity of the effective frequency of history in the effective frequency range of each history
The effective frequency range of each history sets corresponding search priority.For example, it can be seen from practical application experience, waiting to search to each
When rope frequency range is scanned for, the probability of effective frequency is searched from the effective frequency range of history with the effective frequency of more history,
It is far longer than and is searched from the invalid frequency range of history with the effective frequency of less history or without the effective frequency of history effectively
The probability of frequency.Therefore, user terminal can according to the effective frequency of history in frequency range quantity order from big to small, be followed successively by
The effective frequency range of each history sets search priority from high to low.Therefore, when the effective frequency of history in the effective frequency range of history
Quantity it is more when, it is preferential that the frequency band search priority of the effective frequency range of the history can be set to higher search by user terminal
Level；When the negligible amounts of the effective frequency of history in the effective frequency range of history, user terminal can be by the effective frequency range of the history
Frequency range rope priority is set to relatively low search priority.
For example, it is assumed that the quantity of the effective frequency of history in A frequency ranges is the quantity of the effective frequency of history in 2, B frequency ranges
For 3.In this step, during the search priority of A frequency ranges can be set to by user terminal, by the search priority of B frequency ranges
It is set to height；Or, the search priority of A frequency ranges can also be set to 2 by user terminal, and the search priority of B frequency ranges is set
1 is set to, wherein, the numerical value of search priority is bigger, then search priority is lower.In addition, user terminal can also be according to other
Presetting method sets the search priority of the effective frequency range of each history.For example, in practical situations, can also be according to each
The quantity of the effective frequency of history in the effective frequency range of history, directly specifies the frequency band search priority of the effective frequency range of each history.
It should be noted that when the quantity of the effective frequency of history in the effective frequency range of two or more history is identical, at this
In the specific embodiment of invention, user terminal can be set by comparing the height of minimum frequency in the effective frequency range of each history
The search priority of the effective frequency range of each history；Or, user terminal can also be by comparing in the effective frequency range of each history most
The height of high frequency points, sets the search priority of the effective frequency range of each history.Specifically, user terminal can be according to minimum frequency
Or the order of highest frequency from high to low sets the search priority of the effective frequency range of each history；Can also according to minimum frequency or
The order of highest frequency from low to high sets the search priority of the effective frequency range of each history；Can also be according to other presetting methods
The search priority of the effective frequency range of each history is set.
Step 304, according to preset rules it is that the invalid frequency range of each history sets corresponding search priority.
In a particular embodiment of the present invention, user terminal will also be also provided with corresponding search for the invalid frequency range of each history
Rope priority.Wherein, the search priority of the invalid frequency range of all history be below the effective frequency range of any one history search it is excellent
First level.
Preferably, user terminal can be that each is gone through by comparing the height of minimum frequency in the invalid frequency range of each history
The invalid frequency range of history sets corresponding search priority；Or, user terminal can also be by comparing the invalid frequency range of each history
The height of interior highest frequency, is that the invalid frequency range of each history sets corresponding search priority.Specifically, user terminal can be with
The search priority of the invalid frequency range of each history is set according to the order of minimum frequency or highest frequency from high to low；Can also be by
The search priority of the invalid frequency range of each history is set according to the order of minimum frequency or highest frequency from low to high；Can also be according to
Other presetting methods are that the invalid frequency range of each history sets corresponding search priority.
Pass through above-mentioned step 301~304, you can the search being arranged on for each frequency range to be searched in this frequency sweep is preferential
Level.
In the frequency sweeping method of the above-mentioned user terminal of the present invention, because user terminal can be each before step 201
Individual frequency range to be searched pre-sets different search priorities, and is not to be provided according in existing protocol in step 201
Frequency sweep order each frequency range to be searched is scanned for successively, but each is waited to search according to the search priority pre-set
Rope frequency range is scanned for, hence in so that user terminal first can enter to the effective frequency range of history with the more effective frequency of history
Row search, to search effective frequency as early as possible, so as to greatly reduce the time that user terminal searches effective frequency, effectively contracting
The frequency sweep time of short user terminal, improve the frequency sweep efficiency of user terminal.
Further, since in the frequency sweeping method of user terminal of the prior art, user terminal is carried out in frequency range to be searched
During search, even to the distribution of effective frequency than sparse frequency range to be searched, it is existing that used sweep interval, which is remained on,
Minimum sweep interval 100KHz specified in agreement, therefore the frequency sweep time spent by user terminal is longer, causes frequency sweep efficiency
Lowly.
Therefore, in order to further shorten frequency sweep time of user terminal, the frequency sweep efficiency of user terminal is improved, in the present invention
Preferred embodiment in, each frequency range to be searched is scanned for described in above-mentioned steps 201 can be by the steps come real
It is existing：
According to the predetermined sweep interval corresponding with frequency range to be searched each described in each frequency to be searched
The effective frequency of search in section.
It is preferred that in a particular embodiment of the present invention, to before frequency range to be searched is scanned for each described, user
Terminal can also predefine the sweep interval corresponding with each frequency range to be searched.Fig. 4 is present invention determine that each is to be searched
The method flow diagram of the sweep interval of frequency range.As shown in figure 4, including step as described below：
Step 401：Obtain the effective frequency of history in the effective frequency range of each history.
In a particular embodiment of the present invention, due to recording method that user terminal is used when preserving the effective frequency of history
In multiple bits can be set（bit）, and represent that the history belonging to the effective frequency of the history has with the value of each bit
Imitate frequency range.Therefore, in this step, user terminal can be according to for the effective frequency range of history belonging to representing the effective frequency of history
Bit, judge the effective frequency range of history belonging to the effective frequency of each history, and then the effective frequency range of each history can be obtained
The effective frequency of interior history.
Step 402：According to the frequency interval between the effective frequency of each history in the effective frequency range of each history, it is determined that with
The corresponding sweep interval of the effective frequency range of each history.
Preferably, in this step, user terminal can be by the two neighboring effective frequency of history in the effective frequency range of each history
Minimum frequency interval between point is used as the sweep interval corresponding with the effective frequency range of the history.Specifically, when user terminal exists
Get after the effective frequency of history in the effective frequency range of each history, can calculate in the effective frequency range of each history per adjacent
Frequency interval between two effective frequencies of history, then relatively per the frequency interval between the effective frequency of two neighboring history
Size, obtains the minimum frequency interval in the effective frequency range of each history between the two neighboring effective frequency of history, user terminal
It regard the minimum frequency interval in the effective frequency range of each history as the sweep interval corresponding with the effective frequency range of each history.
Step 403：The sweep interval corresponding with the invalid frequency range of each history is determined according to presetting method.
In this step, the sweep interval corresponding with the invalid frequency range of each history can be set to minimum by user terminal
Sweep interval（For example, 100KHz）.
Pass through above-mentioned step 401 and 403, you can all determine a corresponding frequency sweep in advance for each frequency range to be searched
Interval.
In addition, it is preferred that in a particular embodiment of the present invention, when according to the search priority pre-set and in advance
The sweep interval corresponding with the effective frequency range of each history determined is not searched for yet after being scanned for each frequency range to be searched
During at least one effective frequency, the frequency sweeping method of the user terminal in the present invention can further include：
The sweep interval corresponding with the effective frequency range of each history is set to minimum sweep interval.
Treated according to the search priority pre-set and the sweep interval corresponding with each frequency range to be searched at each
Effective frequency is searched again in search frequency range.
Above-mentioned frequency sweeping method will in detail be introduced by taking embodiment in first as an example below.
Fig. 5 is the implementation process figure of the first embodiment of the invention.As shown in figure 5, including step as described below
Suddenly：
Step 501：One history is selected from the effective frequency range of history to be searched according to the search priority pre-set
Effective frequency range is as the effective frequency range of current history, according to the predetermined sweep interval corresponding with the effective frequency range of current history
Effective frequency is searched in the effective frequency range of current history.
In this step, user terminal determines the effective frequency range of each history according to the height of the search priority pre-set
Search order；According to identified search order, an effective frequency range of history is selected from the effective frequency range of history to be searched
As the effective frequency range of current history, gone through according to the predetermined sweep interval corresponding with the effective frequency range of current history currently
The effective frequency of search in the effective frequency range of history.For example, it is assumed that user terminal supports 3 frequency ranges, respectively A frequency ranges, B frequency ranges and C frequencies
Section.Before this step, A frequency ranges and B frequency ranges are respectively set to the effective frequency range of history by user terminal, and C frequency ranges are set to go through
The invalid frequency range of history, and the search priority of A frequency ranges and B frequency ranges is set to neutralization height by user terminal respectively.In this step,
User terminal selects B frequency ranges as the effective frequency range of current history, according to true in advance first according to the search priority pre-set
The fixed sweep interval corresponding with B frequency ranges searches for effective frequency in B frequency ranges.
Step 502：Judge an effective frequency whether is at least searched in the effective frequency range of current history；If so, performing
Step 503；Otherwise, step 504 is performed.
In this step, when user terminal at least searches an effective frequency in the effective frequency range of current history, hold
Row step 503；When user terminal does not search effective frequency in the effective frequency range of current history, step 504 is performed.Example
Such as, when user terminal at least searches an effective frequency in B frequency ranges, step 503 is performed；When user terminal is in B frequency ranges
When inside not searching effective frequency, step 504 is performed.
Step 503：Perform step 202.
In this step, when user terminal at least searches an effective frequency in the effective frequency range of current history, hold
Row step 202.
Step 504：Judge whether each effective frequency range of history to be searched is searched finishing；If so, performing step
505；Otherwise, return and perform step 501.
In this step, when each effective frequency range of history to be searched is searched finishing, step 505 is performed；When treating
When the effective frequency range of history of search also is not searched finishing, returns and perform step 501.
Step 505：The effective frequency range of all history is re-set as the effective frequency range of history to be searched.
In this step, when each effective frequency range of history to be searched is searched finishing, user terminal is gone through all
The effective frequency range of history is re-set as the effective frequency range of history to be searched.For example, user terminal resets A frequency ranges and B frequency ranges
For the effective frequency range of history to be searched.
Step 506：The sweep interval corresponding with the effective frequency range of each history is set to minimum sweep interval.
In this step, the sweep interval corresponding with the effective frequency range of each history can be set to minimum by user terminal
Sweep interval（For example, 100KHz）.
Step 507：One history is selected from the effective frequency range of history to be searched according to the search priority pre-set
Effective frequency range searches for effectively frequency according to minimum sweep interval as the effective frequency range of current history in the effective frequency range of current history
Point.
In this step, user terminal determines the effective frequency range of each history according to the height of the search priority pre-set
Search order；According to identified search order, an effective frequency range of history is selected from the effective frequency range of history to be searched
As the effective frequency range of current history, effective frequency is searched in the effective frequency range of current history according to minimum sweep interval.For example, false
If user terminal supports 3 frequency ranges, respectively A frequency ranges, B frequency ranges and C frequency ranges.Before this step, user terminal by A frequency ranges and
B frequency ranges are respectively set to the effective frequency range of history, and C frequency ranges are set into the invalid frequency range of history, and user terminal is respectively by A frequency ranges
It is set to neutralize height with the search priority of B frequency ranges.In this step, user terminal is according to the search priority pre-set,
Selection B frequency ranges first search for effective frequency according to minimum sweep interval as the effective frequency range of current history in B frequency ranges.
Step 508：Judge an effective frequency whether is at least searched in the effective frequency range of current history；If so, performing
Step 503；Otherwise, step 509 is performed.
In this step, when user terminal at least searches an effective frequency in the effective frequency range of current history, hold
Row step 503；When user terminal does not search effective frequency in the effective frequency range of current history, step 509 is performed.Example
Such as, user terminal judges an effective frequency whether is at least searched in B frequency ranges；If so, performing step 503；Otherwise, perform
Step 509.
Step 509：Judge whether each effective frequency range of history to be searched is searched finishing；If so, performing step
510；Otherwise, return and perform step 507.
In this step, when each effective frequency range of history to be searched is searched finishing, step 510 is performed；When treating
When the effective frequency range of history of search is not searched finishing, returns and perform step 507.
Step 510：According to the search priority that pre-sets and predetermined relative with the invalid frequency range of each history
The sweep interval answered searches for effective frequency in the effective frequency range of each history successively.
In this step, user terminal determines the invalid frequency range of each history according to the height of the search priority pre-set
Search order；According to identified search order, according to predetermined and each history in the invalid frequency range of each history
The corresponding sweep interval of invalid frequency range searches for effective frequency.
In addition, it is preferred that in a particular embodiment of the present invention, when according to the effective frequency range of current history is corresponding sweeps
Frequency is spaced in the effective frequency range of current history scan for after when not searching at least one effective frequency yet, in the present invention
The frequency sweeping method of user terminal can further include：
The sweep interval corresponding with the effective frequency range of current history is set to minimum sweep interval.
Effective frequency is searched again in the effective frequency range of current history according to minimum sweep interval.
At least one is not searched yet after being scanned for according to minimum sweep interval in the effective frequency range of current history
It is effective in each history successively according to the predetermined sweep interval corresponding with the invalid frequency range of each history during effective frequency
Effective frequency is scanned in frequency range.
Above-mentioned frequency sweeping method will in detail be introduced by taking second of embodiment as an example below.
Fig. 6 is the implementation process figure of second of embodiment of the invention.As shown in fig. 6, including step as described below
Suddenly：
Step 601：One history is selected from the effective frequency range of history to be searched according to the search priority pre-set
Effective frequency range is as the effective frequency range of current history, according to the predetermined sweep interval corresponding with the effective frequency range of current history
The currently active frequency is searched in the effective frequency range of current history.
In this step, user terminal determines the effective frequency range of each history according to the height of the search priority pre-set
Search order；According to identified search order, an effective frequency range of history is selected from the effective frequency range of history to be searched
As the effective frequency range of current history, gone through according to the predetermined sweep interval corresponding with the effective frequency range of current history currently
The effective frequency of search in the effective frequency range of history.For example, it is assumed that user terminal supports 3 frequency ranges, respectively A frequency ranges, B frequency ranges and C frequencies
Section.Before this step, A frequency ranges and B frequency ranges are respectively set to the effective frequency range of history by user terminal, and C frequency ranges are set to go through
The invalid frequency range of history, and the search priority of A frequency ranges and B frequency ranges is set to neutralization height by user terminal respectively.In this step,
User terminal selects B frequency ranges as the effective frequency range of current history, according to true in advance first according to the search priority pre-set
The fixed sweep interval corresponding with B frequency ranges searches for effective frequency in B frequency ranges.
Step 602：Judge an effective frequency whether is at least searched in the effective frequency range of current history；If so, performing
Step 603；Otherwise, step 604 is performed.
In this step, when user terminal at least searches an effective frequency in the effective frequency range of current history, hold
Row step 603；When user terminal does not search effective frequency in the effective frequency range of current history, step 604 is performed.Example
Such as, user terminal judges an effective frequency whether is at least searched in B frequency ranges；If so, performing step 603；Otherwise, perform
Step 604.
Step 603：Perform step 202.
In this step, when user terminal at least searches an effective frequency in the effective frequency range of current history, hold
Row step 202.
Step 604：The sweep interval corresponding with the effective frequency range of current history is set to minimum sweep interval.
In this step, the sweep interval corresponding with the effective frequency range of current history can be set to minimum by user terminal
Sweep interval（For example, 100KHz）.
Step 605：Effective frequency is searched in the effective frequency range of current history according to minimum sweep interval.
In this step, when user terminal according to the sweep interval corresponding with the effective frequency range of current history in current history
When not searching effective frequency in effective frequency range, user terminal is searched according to minimum sweep interval in the effective frequency range of current history
Suo Youxiao frequencies.
Step 606：Judge an effective frequency whether is at least searched in the effective frequency range of current history；If so, returning
Perform step 603；Otherwise, step 607 is performed.
In this step, when user terminal searches at least one effective frequency in the effective frequency range of current history, return
Receipt row step 603；When user terminal does not search effective frequency in the effective frequency range of current history, step 607 is performed.
Step 607：Judge whether each effective frequency range of history to be searched is searched finishing；If so, performing step
608；Otherwise, return and perform step 601.
In this step, when each effective frequency range of history to be searched is searched finishing, step 608 is performed；When treating
When the effective frequency range of history of search is not searched finishing, returns and perform step 601.
Step 608：According to the search priority that pre-sets and predetermined relative with the invalid frequency range of each history
The sweep interval answered searches for effective frequency in the effective frequency range of each history successively.
In this step, user terminal determines the invalid frequency range of each history according to the height of the search priority pre-set
Search order；According to identified search order, according to predetermined and each history in the invalid frequency range of each history
The corresponding sweep interval of invalid frequency range searches for effective frequency.
It is preferred that in order that effective frequency can be faster searched in frequency sweep next time by obtaining user terminal, user is whole
End can be stored in the currently active frequency searched in this frequency sweep after this frequency sweep.It is preferred that in the tool of the present invention
In body embodiment, user terminal can also be according to the currently active frequency searched in this frequency sweep and owning for pre-saving
The effective frequency of history in frequency range to be searched, resets search priority.Specifically, user terminal can be by this frequency sweep
In the currently active frequency that searches be added in the effective frequency of history in all frequency ranges to be searched pre-saved, according to such as
The method to set up of search priority shown in Fig. 3 resets search priority, and user terminal judges that the search reset is excellent
Whether first level is identical with the search priority pre-saved, if identical, and user terminal keeps the search priority pre-saved；If
Differ, user terminal replaces the search priority reset the search priority pre-set.
The frequency sweeping method of user terminal proposed by the present invention, when the effective frequency of history in all frequency ranges to be searched is nothing
When imitating frequency, each frequency range to be searched will be scanned for successively according to the search priority pre-set, rather than according to existing
Have fixed specified in agreement frequency sweep order each frequency range to be searched is scanned for successively, therefore operator frequency dispose
In the case that strategy change is little, user terminal can as soon as possible be searched according to the search priority of each frequency range to be searched works as
Preceding effective frequency, so as to effectively shorten the frequency sweep time of user terminal, improves the frequency sweep efficiency of user terminal.
Further, because in the frequency range to be searched of part, the distribution of effective frequency is general than sparse（For example, most
Closely-spaced is 20MHz）, in the frequency sweeping method of user terminal proposed by the present invention, user terminal is in above-mentioned part frequency to be searched
When being scanned in section, effective frequency first is searched for using larger sweep interval, therefore user terminal can be searched as soon as possible
The currently active frequency, so as to the frequency sweep time of effectively user terminal, improves the frequency sweep efficiency of user terminal.
Fig. 7 is the searcher structural representation of user terminal of the present invention.As shown in fig. 7, described device includes：Search is single
Member 701 and selecting unit 702；
The search unit 701, for when the effective frequency of history in all frequency ranges to be searched is invalid frequency, root
Effective frequency is searched in each described frequency range to be searched successively according to the search priority pre-set, by the effective frequency searched
Point is notified to selecting unit 702；
The selecting unit 702, for from effective frequency where the effective frequency of search first in frequency range to be searched
An effective frequency is selected to be used as the currently active frequency in point.
Further, described device is still further comprised：Judging unit 703；
The judging unit 703, for according to the effective frequency of history in predetermined threshold value and all frequency ranges to be searched
Rssi measurement value, judges whether that the effective frequency of history in all frequency ranges to be searched is invalid frequency, if so, to the search
Unit 701 sends a search instruction.
Further, described device is still further comprised：Setting unit 704；
The setting unit 704, the quantity for counting the effective frequency of history in each described frequency range to be searched；According to
The quantity of predetermined number and the effective frequency of history in each described frequency range to be searched, each described frequency range to be searched is set
For the effective frequency range of history or the invalid frequency range of history；According to the quantity of the effective frequency of history in each described effective frequency range of history,
For the effective frequency range of history each described, corresponding search priority is set；It is each described invalid frequency of history according to preset rules
Section sets corresponding search priority, by the search priority corresponding with the effective frequency range of history each described and and each
The corresponding search priority of the invalid frequency range of history is sent to the search unit 701.
Further, the search unit 701, specifically for according to predetermined with frequency range phase to be searched each described
Corresponding sweep interval searches for effective frequency in each described frequency range to be searched.
Further, described device is still further comprised：Determining unit 705；
The determining unit 705, for obtaining the effective frequency of history in each described effective frequency range of history；According to each
The frequency interval between the effective frequency of each history in the effective frequency range of history, it is determined that relative with the effective frequency range of history each described
The sweep interval answered；The sweep interval corresponding with the invalid frequency range of history each described is determined according to presetting method, will be with each
The corresponding sweep interval of the frequency range to be searched is sent to the search unit 701.
The frequency-sweeping apparatus of user terminal proposed by the present invention, the frequency sweeping method of user terminal proposed by the present invention, when all
When the effective frequency of history in frequency range to be searched is invalid frequency, the search priority that basis is pre-set is successively to each
Frequency range to be searched is scanned for, rather than according to fixed specified in existing protocol frequency sweep order successively to each frequency range to be searched
Scan for, therefore in the case of the frequency deployment strategy change less of operator, user terminal can be waited to search according to each
The search priority of rope frequency range searches the currently active frequency as soon as possible, during frequency sweep so as to effectively shorten user terminal
Between, improve the frequency sweep efficiency of user terminal.
Further, because in the frequency range to be searched of part, the distribution of effective frequency is general than sparse（For example, most
Closely-spaced is 20MHz）, in the frequency sweeping method of user terminal proposed by the present invention, user terminal is in above-mentioned part frequency to be searched
When being scanned in section, effective frequency first is searched for using larger sweep interval, therefore user terminal can be searched as soon as possible
The currently active frequency, so as to the frequency sweep time of effectively user terminal, improves the frequency sweep efficiency of user terminal.
Claims (6)
1. a kind of frequency sweeping method of user terminal, it is characterised in that including：
When the effective frequency of history in all frequency ranges to be searched is invalid frequency, according to the search priority pre-set according to
It is secondary to search for effective frequency in each described frequency range to be searched；Wherein, it is described to search for effective in each described frequency range to be searched
Frequency is：According to the predetermined sweep interval corresponding with frequency range to be searched each described in each frequency range to be searched
The interior effective frequency of search；
An effective frequency conduct is selected from effective frequency where the first effective frequency searched in frequency range to be searched
The currently active frequency；
Wherein, the method for predefining the sweep interval corresponding with frequency range to be searched each described is specifically included：
Obtain the effective frequency of history in the effective frequency range of each history；
According to the frequency interval between the effective frequency of each history in the effective frequency range of each history, it is determined that with history each described
The corresponding sweep interval of effective frequency range；
The sweep interval corresponding with the invalid frequency range of history each described is determined according to presetting method.
2. according to the method described in claim 1, it is characterised in that the search priority pre-set in the basis exists successively
In each frequency range to be searched before the effective frequency of search, this method is still further comprised：
According to the rssi measurement value of the effective frequency of history in predetermined threshold value and all frequency ranges to be searched, judge whether to be needed
The effective frequency of history searched in frequency range is invalid frequency.
3. according to the method described in claim 1, it is characterised in that the method for pre-setting the search priority is specifically wrapped
Include：
Count the quantity of the effective frequency of history in each described frequency range to be searched；
It is according to the quantity of the effective frequency of history in predetermined number and each described frequency range to be searched, each is described to be searched
Frequency range is set to the effective frequency range of history or the invalid frequency range of history；
It is that each described effective frequency range of history is set according to the quantity of the effective frequency of history in each described effective frequency range of history
Corresponding search priority；
Corresponding search priority is set for each described invalid frequency range of history according to preset rules.
4. a kind of frequency-sweeping apparatus of user terminal, it is characterised in that including：Search unit, selecting unit and determining unit；
The search unit, for when the effective frequency of history in all frequency ranges to be searched is invalid frequency, according to advance
The search priority of setting searches for effective frequency in each described frequency range to be searched successively, and the effective frequency searched is notified
To selecting unit；Wherein, it is described to search for effective frequency in each described frequency range to be searched and be：According to it is predetermined and each
The corresponding sweep interval of the frequency range to be searched searches for effective frequency in each described frequency range to be searched；
The selecting unit, for being selected from effective frequency where the first effective frequency searched in frequency range to be searched
One effective frequency is used as the currently active frequency；
The determining unit, for obtaining the effective frequency of history in the effective frequency range of each history；According to the effective frequency of each history
The frequency interval between the effective frequency of each history in section, it is determined that between the frequency sweep corresponding with the effective frequency range of history each described
Every；The sweep interval corresponding with the invalid frequency range of history each described is determined according to presetting method, will with it is to be searched each described
The corresponding sweep interval of frequency range is sent to the search unit.
5. device according to claim 4, it is characterised in that described device is still further comprised：Judging unit；
The judging unit, for the rssi measurement according to the effective frequency of history in predetermined threshold value and all frequency ranges to be searched
Value, judges whether that the effective frequency of history in all frequency ranges to be searched is invalid frequency, if so, being sent to the search unit
One search instruction.
6. device according to claim 4, it is characterised in that described device is still further comprised：Setting unit；
The setting unit, the quantity for counting the effective frequency of history in each described frequency range to be searched；According to present count
The quantity of amount and the effective frequency of history in each described frequency range to be searched, history is set to by each described frequency range to be searched
Effective frequency range or the invalid frequency range of history；It is each according to the quantity of the effective frequency of history in each described effective frequency range of history
The effective frequency range of history sets corresponding search priority；Set according to preset rules for each described invalid frequency range of history
Corresponding search priority, by the search priority corresponding with the effective frequency range of history each described and with being gone through described in each
The corresponding search priority of the invalid frequency range of history is sent to the search unit.
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| CN103095383B (en) * | 2012-11-07 | 2015-12-09 | 无锡成电科大科技发展有限公司 | The band scan device of mobile terminal |
| CN106304219A (en) * | 2015-06-01 | 2017-01-04 | 北京信威通信技术股份有限公司 | A kind of method being switched fast in mobile communication system |
| CN109348524B (en) * | 2015-06-26 | 2022-11-22 | 华为技术有限公司 | Frequency band searching method and device |
| EP3217692A1 (en) * | 2016-03-11 | 2017-09-13 | Sony Mobile Communications Inc | A method for providing band scanning prioritization, and a mobile communications device incorporating the method |
| CN111065136A (en) * | 2019-12-13 | 2020-04-24 | RealMe重庆移动通信有限公司 | Cell selection method, terminal device and storage medium |
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| KR100842542B1 (en) * | 2006-11-21 | 2008-07-01 | 삼성전자주식회사 | Method for scanning frequency in dvb-h reception terminal and the terminal |
| CN101325757B (en) * | 2007-06-15 | 2011-07-20 | 上海摩波彼克半导体有限公司 | Method for implementing selection of multiple-band multi-access technique district by wireless communication mobile equipment |
| CN101820637B (en) * | 2010-03-23 | 2012-07-18 | 展讯通信（上海）有限公司 | Measurement method of time division-synchronous code division multiple access system and dual mode terminal |
| CN102340807B (en) * | 2010-07-23 | 2016-10-05 | 重庆重邮信科通信技术有限公司 | A kind of method for monitoring network |
| CN102355712A (en) * | 2011-10-11 | 2012-02-15 | 中兴通讯股份有限公司 | Method for accelerating searching speed of public land mobile network and device |
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