CN101123813A - A method and wireless terminal for searching registration frequency points - Google Patents
A method and wireless terminal for searching registration frequency points Download PDFInfo
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- CN101123813A CN101123813A CNA2007101208789A CN200710120878A CN101123813A CN 101123813 A CN101123813 A CN 101123813A CN A2007101208789 A CNA2007101208789 A CN A2007101208789A CN 200710120878 A CN200710120878 A CN 200710120878A CN 101123813 A CN101123813 A CN 101123813A
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Abstract
The invention discloses a method and a movable terminal to search frequency points which can be logged on. The method includes the following steps of A, dividing a whole frequency band into a plurality of sub-frequency bands to get a sub-frequency band congregation; B, selecting a sub-frequency band from the sub-frequency band congregation, measuring the RSSI of each frequency point in the selected sub-frequency band and acquiring the frequency point with the strongest signal; C, judging whether the signal intensity of the frequency point with the strongest signal is bigger than the threshold value of RSSI or not, if so, searching a district on the frequency point to stay; if not, returning to step B after removing the sub-frequency band that is currently selected from the sub-frequency band congregation. The method and wireless terminal of the invention has effectively reduced the time for a wireless terminal to log on the system.
Description
Technical field
The invention belongs to wireless communication technology field, relate in particular to a kind of method and wireless terminal of searching registration frequency points.
Background technology
Wireless terminal at first will carry out the frequency search when start, find a frequency that signal is the strongest also further to seek proper cell on this frequency and carry out resident.
The frequency search of wireless terminal mainly contains dual mode: a kind of is the full frequency band search, and promptly terminal is not stored any information about frequency (perhaps not using the information about frequency of being stored), need be at the enterprising line frequency point search of whole frequency; Another mode is the frequency search that has storage information, and terminal is searched for the frequency that has stored earlier, carries out residently if can not find proper cell on these frequencies, will change the full frequency band search so over to.
Along with developing rapidly of radio communication, increasing frequency spectrum resource is utilized by radio communication.For a certain radio communication standard, the frequency band that it is got is wide more, and its terminal is in that to carry out the spent time in full frequency band when search just long more so.Like this, be unfavorable for the power saving of terminal on the one hand, also prolonged the needed time of terminal login system on the other hand.
Therefore, seek under a kind of broadband situation, quick searching registration frequency points of wireless terminal and the method that inserts just become the technical problem that needs to be resolved hurrily.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method and wireless terminal of searching registration frequency points, to reduce the wireless terminal needed time of login system.
For solving the problems of the technologies described above, it is as follows to the invention provides technical scheme:
A kind of method of searching registration frequency points comprises the steps:
A, full frequency band to be searched is divided into a plurality of sub-bands, obtains subband sets;
B, from subband sets, choose a sub-frequency bands, measure the received signal intensity indication (RSSI) of each frequency in the selected sub-band, and obtain the strongest frequency of signal;
C, judge the frequency that described signal is the strongest signal strength signal intensity whether greater than the RSSI threshold value, if then on this frequency, seek the sub-district and carry out resident; Otherwise, after the sub-band of current selection removed, return step B from subband sets.
Preferably, among the step C, after the sub-band of current selection is removed, judge further whether described subband sets is empty from subband sets, and when definite described subband sets was combined into sky, the frequency that signal is the strongest from full frequency band was sought the sub-district and is carried out resident.
Preferably, steps A further comprises, the priority of sub-band is set; Among the step B, the described sub-frequency bands of choosing from subband sets is: choose a highest sub-band of priority from subband sets.
Preferably, in the steps A, the extensive degree that is used according to sub-band is provided with its priority.
A kind of wireless terminal comprises:
The frequency band division module is used for full frequency band to be searched is divided into a plurality of sub-bands, obtains subband sets;
The strongest frequency acquisition module of signal is used for choosing a sub-frequency bands from subband sets, measures the RSSI of each frequency in the selected sub-band, and obtains the strongest frequency of signal;
Judge login module, whether the signal strength signal intensity of the frequency that is used to judge that described signal is the strongest greater than the RSSI threshold value, and, seeks the sub-district and carry out resident on this frequency during greater than the RSSI threshold value in the signal strength signal intensity of determining the frequency that described signal is the strongest; And when the signal strength signal intensity of determining the frequency that described signal is the strongest is not more than the RSSI threshold value, after the sub-band of current selection removed from subband sets, the strongest frequency acquisition module of triggering signal.
Preferably, described judgement login module after the sub-band of current selection is removed, judges further whether described subband sets is empty from subband sets, and when definite described subband sets was combined into sky, the frequency that signal is the strongest from full frequency band was sought the sub-district and is carried out resident.
Preferably, the frequency band division module is further used for being provided with the priority of sub-band; The strongest frequency acquisition module of signal is further used for choosing a highest sub-band of priority from subband sets.
Preferably, the frequency band division module further is provided with its priority according to the extensive degree that sub-band is used.
Method of the present invention and wireless terminal, do not need full frequency band is searched for, but full frequency band to be searched is divided into a plurality of sub-bands, when searching on the sub-band therein, satisfy pre-conditioned frequency if having, carry out residently with regard to directly seek the sub-district on this frequency, this has reduced the needed time of portable terminal login system on the one hand, further helps the power saving of portable terminal.
Description of drawings
Fig. 1 is the method flow diagram of the searching registration frequency points of preferred embodiment of the present invention;
Fig. 2 is the structural representation of the wireless terminal of preferred embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Key of the present invention is: at first full frequency band to be searched is divided into a plurality of sub-bands; On each sub-band, seek the strongest frequency of signal then successively; If the strongest frequency of signal satisfies pre-conditionedly on a certain sub-band, portable terminal is directly sought sub-district and wherein resident at this frequency so, otherwise continues the next sub-band of search.Here, the power of each frequency signal is represented by the RSSI of this frequency.
Please refer to Fig. 1, the method idiographic flow of the searching registration frequency points of preferred embodiment of the present invention is as follows:
Here be that example describes with the TD-SCDMA system, suppose that the final employed bandwidth of TD-SCDMA system is 2010～2025MHz and 1880～1920MHz, it can be divided into following three sub-frequency bands so:
SubBand
(0)：2010～2025MHz
SubBand
(1)：1880～1900MHz
SubBand
(2)：1900～1920MHz
Full frequency band to be searched can certainly be divided into more sub-band, be divided into a sub-frequency bands as every 5MHz.
During divided band, preferably a continuous band frequency is divided into a sub-frequency bands, and the priority of sub-band is set, for example the extensive degree that is used according to each sub-band is provided with its priority.Suppose that this sub-band of 2010～2025MHz is used the most extensively; 1880～1900MHz takes second place; 1900～1920MHz takes second place again, after the frequency band division, should give this sub-band of 2010～2025MHz to the highest priority so; Inferior high priority is given this sub-band of 1880～1900MHz; Minimum priority is given 1900～1920MHz.So just can make portable terminal find suitable frequency as soon as possible, as much as possible saving time.If the extensive degree that certain each sub-band is used is the same or unknown, when divided band, can not carry out the priority setting so.
If be provided with the priority of sub-band, then in this step, from subband sets, choose a highest sub-band of priority.Measure the RSSI of each frequency in this sub-band then, and find out the strongest frequency of signal by comparing RSSI.
In each sub-band, by the value of RSSI relatively, can the strongest frequency of select-out signal, no matter whether this sub-band exists signal really.So behind the strongest frequency of a certain sub-band select-out signal, need verify and confirm the signal strength signal intensity of this frequency, promptly require the signal strength signal intensity of this frequency will satisfy and can proper solution turn district's this condition of broadcast message down, so just being unlikely to wastes the quality time on the frequency of mistake.
For the wireless communication system of different systems, the assurance Cell Broadcast CB signal correctly signal strength signal intensity RSSI of demodulation is different.Here use a threshold T
RSSIBe used as the judgment condition that whether the strongest frequency of signal can be used on the sub-band, that is:
If
This frequency can be used so; Otherwise this frequency is unavailable, should seek frequency from other sub-bands.
T
RSSISetting should set according to the wireless communication system and the actual conditions of concrete standard.For example, the TD-SCDMA system to the requirement of terminal sensitivity is-108dBm, and the RSSI value of strong frequency must be greater than-108dBm for signal on the sub-band.
Subband sets is combined into sky, and it is pre-conditioned to illustrate that all sub-bands do not satisfy, and then seeks the sub-district on the frequency that signal is the strongest in full frequency band and carries out resident.Because the signal strength signal intensity of the frequency that signal is the strongest on each sub-band has got access in step 102, thereby, only need here by relatively just selecting the strongest frequency of signal in the full frequency band.
Please refer to Fig. 2, this figure is the structural representation of the wireless terminal of preferred embodiment of the present invention.Its composition mainly comprises: frequency band division module 10, the strongest frequency acquisition module 20 of signal, judgement login module 30.
Frequency band division module 10 is used for full frequency band to be searched is divided into a plurality of sub-bands, obtains subband sets; The strongest frequency acquisition module 20 of signal is used for choosing a sub-frequency bands from subband sets, measures the RSSI of each frequency in the selected sub-band, and obtains the strongest frequency of signal; Whether the signal strength signal intensity of judging the frequency that login module 30 is used to judge that described signal is the strongest greater than the RSSI threshold value, and, seeks the sub-district and carry out resident on this frequency during greater than the RSSI threshold value in the signal strength signal intensity of determining the frequency that described signal is the strongest; And when the signal strength signal intensity of determining the frequency that described signal is the strongest is not more than the RSSI threshold value, after the sub-band of current selection removed from subband sets, the strongest frequency acquisition module 20 of triggering signal.
Wherein, the concrete course of work of each module can not done and give unnecessary details here referring to the description of said method.
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. the method for a searching registration frequency points is characterized in that, comprises the steps:
A, full frequency band to be searched is divided into a plurality of sub-bands, obtains subband sets;
B, from subband sets, choose a sub-frequency bands, measure the received signal intensity indication RSSI of each frequency in the selected sub-band, and obtain the strongest frequency of signal;
C, judge the frequency that described signal is the strongest signal strength signal intensity whether greater than the RSSI threshold value, if then on this frequency, seek the sub-district and carry out resident; Otherwise, after the sub-band of current selection removed, return step B from subband sets.
2. the method for claim 1 is characterized in that:
Among the step C, after the sub-band of current selection is removed, judge further whether described subband sets is empty, and when definite described subband sets was combined into sky, the frequency that signal is the strongest from full frequency band was sought the sub-district and is carried out resident from subband sets.
3. the method for claim 1 is characterized in that:
Steps A further comprises, the priority of sub-band is set;
Among the step B, the described sub-frequency bands of choosing from subband sets is: choose a highest sub-band of priority from subband sets.
4. method as claimed in claim 3 is characterized in that:
In the steps A, the extensive degree that is used according to sub-band is provided with its priority.
5. a wireless terminal is characterized in that, comprising:
The frequency band division module is used for full frequency band to be searched is divided into a plurality of sub-bands, obtains subband sets;
The strongest frequency acquisition module of signal is used for choosing a sub-frequency bands from subband sets, measures the RSSI of each frequency in the selected sub-band, and obtains the strongest frequency of signal;
Judge login module, whether the signal strength signal intensity of the frequency that is used to judge that described signal is the strongest greater than the RSSI threshold value, and, seeks the sub-district and carry out resident on this frequency during greater than the RSSI threshold value in the signal strength signal intensity of determining the frequency that described signal is the strongest; And when the signal strength signal intensity of determining the frequency that described signal is the strongest is not more than the RSSI threshold value, after the sub-band of current selection removed from subband sets, the strongest frequency acquisition module of triggering signal.
6. wireless terminal as claimed in claim 5 is characterized in that:
Described judgement login module, after the sub-band of current selection is removed from subband sets, judge further whether described subband sets is empty, and when definite described subband sets was combined into sky, the frequency that signal is the strongest from full frequency band was sought the sub-district and is carried out resident.
7. wireless terminal as claimed in claim 5 is characterized in that:
The frequency band division module is further used for being provided with the priority of sub-band;
The strongest frequency acquisition module of signal is further used for choosing a highest sub-band of priority from subband sets.
8. wireless terminal as claimed in claim 6 is characterized in that:
The frequency band division module further is provided with its priority according to the extensive degree that sub-band is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101208789A CN101123813A (en) | 2007-08-28 | 2007-08-28 | A method and wireless terminal for searching registration frequency points |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101208789A CN101123813A (en) | 2007-08-28 | 2007-08-28 | A method and wireless terminal for searching registration frequency points |
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| CN101123813A true CN101123813A (en) | 2008-02-13 |
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| CNA2007101208789A Pending CN101123813A (en) | 2007-08-28 | 2007-08-28 | A method and wireless terminal for searching registration frequency points |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010145624A1 (en) * | 2009-10-15 | 2010-12-23 | 中兴通讯股份有限公司 | Method and terminal for cell selection |
| CN102158933A (en) * | 2010-02-11 | 2011-08-17 | 富士通株式会社 | Method and device for frequency band searching in TDD-LTE (Time Division Duplex-Long Term Evolution) system |
| CN102244917A (en) * | 2010-05-14 | 2011-11-16 | 北京信威通信技术股份有限公司 | Communication method for wireless signal restricted environment |
| WO2011144017A1 (en) * | 2010-05-19 | 2011-11-24 | 中兴通讯股份有限公司 | Fast frequency sweeping method and apparatus for mobile terminal, and mobile terminal |
| CN101399563B (en) * | 2008-10-17 | 2012-07-04 | 华为终端有限公司 | Method, terminal and communication system for searching global mobile communication system |
| CN109905907A (en) * | 2019-01-29 | 2019-06-18 | 东莞市步步高通信软件有限公司 | A kind of method for searching network and mobile terminal |
| CN115379584A (en) * | 2022-10-26 | 2022-11-22 | 云南达创环保科技有限公司 | Operation method of garbage classification system and garbage classification system |
| CN115484645A (en) * | 2021-05-31 | 2022-12-16 | ***通信集团重庆有限公司 | Method, device and equipment for determining voice fallback frequency point and computer storage medium |
-
2007
- 2007-08-28 CN CNA2007101208789A patent/CN101123813A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399563B (en) * | 2008-10-17 | 2012-07-04 | 华为终端有限公司 | Method, terminal and communication system for searching global mobile communication system |
| WO2010145624A1 (en) * | 2009-10-15 | 2010-12-23 | 中兴通讯股份有限公司 | Method and terminal for cell selection |
| CN102158933A (en) * | 2010-02-11 | 2011-08-17 | 富士通株式会社 | Method and device for frequency band searching in TDD-LTE (Time Division Duplex-Long Term Evolution) system |
| CN102244917A (en) * | 2010-05-14 | 2011-11-16 | 北京信威通信技术股份有限公司 | Communication method for wireless signal restricted environment |
| WO2011144017A1 (en) * | 2010-05-19 | 2011-11-24 | 中兴通讯股份有限公司 | Fast frequency sweeping method and apparatus for mobile terminal, and mobile terminal |
| US8909181B2 (en) | 2010-05-19 | 2014-12-09 | Zte Corporation | Method and apparatus for implementing fast frequency sweeping of mobile terminal, and mobile terminal |
| CN109905907A (en) * | 2019-01-29 | 2019-06-18 | 东莞市步步高通信软件有限公司 | A kind of method for searching network and mobile terminal |
| CN109905907B (en) * | 2019-01-29 | 2021-05-14 | 维沃移动通信（深圳）有限公司 | Network searching method and mobile terminal |
| CN115484645A (en) * | 2021-05-31 | 2022-12-16 | ***通信集团重庆有限公司 | Method, device and equipment for determining voice fallback frequency point and computer storage medium |
| CN115379584A (en) * | 2022-10-26 | 2022-11-22 | 云南达创环保科技有限公司 | Operation method of garbage classification system and garbage classification system |
| CN115379584B (en) * | 2022-10-26 | 2023-04-04 | 云南达创环保科技有限公司 | Operation method of garbage classification system and garbage classification system |
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