CN101600242A - Small region search method and portable terminal - Google Patents
Small region search method and portable terminal Download PDFInfo
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- CN101600242A CN101600242A CNA2009101519310A CN200910151931A CN101600242A CN 101600242 A CN101600242 A CN 101600242A CN A2009101519310 A CNA2009101519310 A CN A2009101519310A CN 200910151931 A CN200910151931 A CN 200910151931A CN 101600242 A CN101600242 A CN 101600242A
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Abstract
The invention discloses a kind of small region search method and portable terminal, wherein method comprises: historical cell frequency is recorded in the candidate search listing of portable terminal, described historical cell frequency is the frequency of adjacent area of the sub-district of the frequency of sub-district of the resident mistake of described portable terminal and/or the resident mistake of described portable terminal; If according to the frequency and the main scrambler of the candidate sub-district of writing down in the candidate search listing, search is less than sub-district that can be resident, then according to the historical cell frequency in the described candidate search listing, and the sub-district that search can be resident; Described candidate sub-district comprises the adjacent area of the sub-district that sub-district that described portable terminal is last resident and/or described portable terminal are last resident.In the embodiment of the invention, in the frequency adding candidate search listing with historical sub-district, enlarge the scope of Cell searching, can improve the efficient of Cell searching, shortened the time of Cell searching.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to a kind of small region search method and portable terminal.
Background technology
Usually the network search procedure of portable terminal is very of short duration, can finish in several seconds behind mobile terminal-opening.The web search ability of portable terminal can be used as an important indicator estimating the portable terminal quality.
Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, be called for short WCDMA) in the network portable terminal network search procedure normally, when mobile terminal-opening or off-grid, at first select a public land mobile net (Public Land Mobile Network, be called for short PLMN), search belongs to the sub-district of this PLMN then, therefrom select one can be resident proper cell.
In order to make the process of subsequent searches sub-district shorten, in the prior art, in initial ranging after proper cell, can record in the candidate search listing with the current resident sub-district of portable terminal and with the frequency and the main scrambler (Primary Scrambling Code) of the adjacent area of current persistent district, when carrying out Cell searching again behind portable terminal start next time or the off-grid, can from the candidate search listing of mobile terminal stores, search for proper cell, improve the efficient of Cell searching to a certain extent.
But the mode of this Cell searching of prior art, candidate search listing scope is little, under the application scenarios that has, still can't improve the efficient of Cell searching.
For example, first sub-district, two alien frequencies adjacent areas and second sub-district are arranged, when portable terminal from the first sub-district successful switch behind second sub-district, before the measurement control messages issues, portable terminal is step-out on second sub-district, at this moment the neighboring BS information of portable terminal second sub-district can't be learnt by measuring control messages (Measurement Control) in second sub-district, and the cell frequency and the main scrambler of first sub-district have been deleted in the tabulation of the candidate of portable terminal, in ensuing cell search process, the tabulation of mobile terminal to search candidate, but the frequency and the main scrambler that have only second sub-district in the candidate search listing, but second sub-district is current can not be resident, will cause portable terminal to be searched for for a long time like this less than the sub-district, finally cause off-grid and have to search for, and the mode of initial ranging sub-district needs the long time usually by the mode of initial ranging sub-district.
Summary of the invention
The embodiment of the invention provides a kind of small region search method and portable terminal at problems of the prior art, can enlarge the scope of candidate search, effectively shortens the time of Cell searching.
The embodiment of the invention provides a kind of small region search method, comprising:
Historical cell frequency is recorded in the candidate search listing of portable terminal, described historical cell frequency is the frequency of adjacent area of the sub-district of the frequency of sub-district of the resident mistake of described portable terminal and/or the resident mistake of described portable terminal;
If according to the frequency and the main scrambler of the candidate sub-district of writing down in the candidate search listing, search is less than sub-district that can be resident, then according to the historical cell frequency in the described candidate search listing, and the sub-district that search can be resident; Described candidate sub-district comprises the adjacent area of the sub-district that sub-district that described portable terminal is last resident and/or described portable terminal are last resident.
The embodiment of the invention also provides a kind of portable terminal, comprising:
Candidate search listing memory cell is used to store the candidate search listing;
Record cell is used for historical cell frequency is recorded described candidate search listing memory cell, and described historical cell frequency is the frequency of adjacent area of the sub-district of the frequency of sub-district of the resident mistake of described portable terminal and/or the resident mistake of described portable terminal;
Search unit, be used for the frequency of the candidate sub-district of storing according to described candidate search listing memory cell and the sub-district that the search of main scrambler can be resident, described candidate sub-district comprises the adjacent area of the sub-district that sub-district that described portable terminal is last resident and/or described portable terminal are last resident; If search is less than sub-district that can be resident, then according to the historical cell frequency in the described candidate search listing memory cell, the sub-district that search can be resident.
The embodiment of the invention in the frequency adding candidate search listing with historical sub-district, has enlarged the scope of Cell searching, can improve the efficient of Cell searching, shortens the time of Cell searching.
Description of drawings
Figure 1 shows that the embodiment of the invention one small region search method flow chart;
Figure 2 shows that the embodiment of the invention two small region search method flow charts;
Figure 3 shows that the embodiment of the invention three portable terminal example structure schematic diagrames.
Embodiment
The embodiment of the invention provides a kind of small region search method and portable terminal, below by drawings and Examples, technical scheme of the present invention is described in further detail.
Specific embodiment one
The sub-district can be divided into: acceptable sub-district, can be resident sub-district, the sub-district of forbidding, the sub-district of reservation.
Acceptable sub-district be meant user terminal in this sub-district only obtaining some the most basic limited services, such as can only placement of emergency calls.Do not belong to the sub-district of forbidding, and acceptable sub-district can be thought in the sub-district that signal quality meets certain requirements.
Can be meant that portable terminal can obtain normal communication service in this sub-district in resident sub-district, for example can dial voice call, send note etc.Do not belong to the sub-district of forbidding, signal quality meets certain requirements, affiliated PLMN is moved PLMN or reciprocity public land mobile net (the Equivalent Public Land Mobile Network that terminal is selected, be called for short EPLMN), described PLMN or EPLMN not in forbidden route lane place, such sub-district can be considered to can be resident the sub-district.
The sub-district of forbidding is meant the sub-district that portable terminal can't be resident.Usually have clear and definite indication information in the system message that this class sub-district sends, this sub-district of indicating mobile terminal is forbidden.
The sub-district of reserving is meant the sub-district that is used as some special purposes by operator, also has clear and definite indication information in the system message that this class sub-district sends usually, and this sub-district of indicating mobile terminal is reserved.
The process of mobile terminal to search sub-district can be decomposed into two subprocess in the WCDMA network, PLMN search subprocess and Cell searching subprocess.
PLMN has mobile country code (Mobile Country Code, be called for short MCC) and mobile network code, MNC (Mobile Network Code is called for short MNC) common unique definite.PLMN is made up of a lot of sub-districts usually, and frequency and main scrambler unique identification that each sub-district is used by this sub-district are distributed to the sub-district when wherein main scrambler is the network planning.PLMN information under the sub-district is comprised in the system message that the sub-district issues.
When mobile terminal-opening or off-grid, select a PLMN by manual or automated manner, then one of search belong to this PLMN can be resident proper cell.
If portable terminal is the initial selected sub-district, mobile terminal to search general radio interface (UniversalTelecommunication Radio Access then, be called for short UTRA) all interior radio frequency (RadioFrequency of bandwidth, be called for short RF) channel, at each channel, portable terminal is the strongest sub-district of search signal at first, and reads the system message of the strongest sub-district of this signal, so that determine whether the PLMN under this sub-district is available.After finding available PLMN, stop search to remaining channel.The proper cell that initial ranging can be resident in selected PLMN then.Find can be resident proper cell after, portable terminal receives the system message of selecteed sub-district, obtain the information of adjacent area according to this system message, the frequency and the main scrambler of the current persistent district of record in the candidate search listing, and the frequency of the adjacent area of current persistent district and main scrambler.
When portable terminal start next time, from portable terminal, read the frequency and the main scrambler of the candidate sub-district of writing down in the candidate search listing when shutting down last time, the frequency of the candidate sub-district that write down in the candidate search listing this moment and main scrambler come down to the frequency and the main scrambler of the adjacent area of the frequency of the last resident sub-district of this portable terminal and main scrambler and/or last resident sub-district, in the embodiment of the invention, the candidate sub-district comprises the adjacent area of the sub-district that the last resident sub-district of portable terminal and/or portable terminal are last resident.Particularly, portable terminal reads the frequency and the main scrambler of a candidate sub-district from the candidate search listing, receive the system message that this sub-district sends, judge according to system message whether this sub-district can be resident, if this sub-district can not be resident, then continue the next candidate sub-district in the search candidate search listing.
The small region search method that the embodiment of the invention provides, on the basis of above technical scheme, also with the frequency record of historical sub-district in the candidate search listing, when portable terminal needs search cell, if during less than suitable cell that can be resident, according to the frequency of historical sub-district, whether the search history sub-district can be resident according to the frequency of the candidate sub-district of writing down in the candidate search listing and the search of main scrambler, can enlarge the scope of Cell searching like this, thereby effectively improve the efficient of Cell searching
Be illustrated in figure 1 as the embodiment of the invention one small region search method flow chart, comprise:
Particularly, in the step 101, when portable terminal resident behind the sub-district, in the candidate search listing, record is carried out in the sub-district of resident mistake and the frequency of adjacent area thereof, rather than as prior art, resident behind the sub-district when portable terminal, the frequency of resident sub-district and main scrambler record are all deleted before inciting somebody to action in the candidate search listing.
In embodiments of the present invention, the adjacent area with the sub-district of resident mistake before the sub-district of resident mistake before the portable terminal and/or the portable terminal is called historical sub-district.The candidate cell information comprises the frequency and the main scrambler of candidate sub-district.Historical cell information is the frequency of historical sub-district.
Specific embodiment two
Be illustrated in figure 2 as the embodiment of the invention two small region search method flow charts, comprise:
Whether the sub-district that step 204, judgement search can be resident, if the sub-district that searches can be resident, then portable terminal is selected the resident sub-district of arriving to current search, otherwise, execution in step 205.
Search can be resident the sub-district after, Cell searching when finishing portable terminal from CELL_DCH to the CELL-PCH state transitions, resident in the sub-district that searches, receive then search can be resident the measuring control information of sub-district, acquisition searches can be resident the frequency of sub-district and the frequency and the main scrambler of main scrambler and adjacent area thereof, and will search can be resident the frequency of sub-district and the frequency of main scrambler and adjacent area thereof and candidate cell information that main scrambler records the candidate search listing in, the frequency record of the sub-district before will migration is in the historical cell information of candidate search listing.
Use the method that the embodiment of the invention provides, can effectively shorten the time of Cell searching.
For the scene in the background technology one, when portable terminal is searched for less than sub-district that can be resident from the candidate sub-district of candidate search listing, can from historical sub-district, search for can be resident the sub-district, for the portable terminal in the scene one, first sub-district and second sub-district are the historical sub-districts of resident mistake, so comprise the frequency of the adjacent area of the frequency of adjacent area of first sub-district and first sub-district and second sub-district and second sub-district in the historical sub-district of candidate search listing.In addition, second sub-district is as the last resident sub-district of portable terminal, and second sub-district also is the candidate sub-district in the candidate search listing.Portable terminal is according to the frequency of second sub-district of writing down in the candidate search listing and the search of main scrambler during less than sub-district that can be resident, but portable terminal is according to the frequency search persistent district of second sub-district, but current second sub-district can not be resident, then portable terminal according to the frequency search of first sub-district to first sub-district, portable terminal was once resident in first sub-district, so portable terminal is judged first sub-district easily can be resident, but so just can be under the situation of search from the candidate sub-district less than persistent district, but from historical sub-district, be easy to search persistent district, but shortened the time that searches persistent district, improved the efficient of Cell searching.
For a kind of scene two, for example: for two same sub-districts, non-adjacent area frequently, first sub-district and second sub-district, there are two neighbor cells second sub-district, i.e. the 3rd sub-district and the 4th sub-district, when portable terminal after the second sub-district step-out, in the process of upgrading, sub-district in the mobile terminal to search candidate search listing, at this moment in the candidate tabulation second sub-district is arranged, the 3rd sub-district, the frequency of the 4th sub-district and main scrambler, but portable terminal can't find suitable persistent district by search candidate search listing, if adopt prior art, then portable terminal is had to circulate in the candidate search listing always and is searched for, cause increase search time, but with second sub-district with frequently can be resident first sub-district owing to be not the adjacent area of second sub-district, be not recorded in the candidate search listing, and can not be searched as early as possible.
For scene two, if the method that adopts the embodiment of the invention to provide, portable terminal is in the resident mistake in second sub-district, so portable terminal can write down the frequency of the adjacent area of the frequency of second sub-district and second sub-district, when portable terminal in second sub-district during step-out, portable terminal is searched for from the candidate sub-district of candidate search listing less than sub-district that can be resident, search in can the historical sub-district from the candidate search listing can be resident first sub-district, because the frequency of first sub-district is identical with the frequency of second sub-district, and include only the frequency of historical sub-district in the historical sub-district record of candidate search listing, and do not comprise main scrambler, frequency by historical sub-district can search a plurality of sub-districts, therefrom can select can be resident the sub-district.And if when frequency by the candidate sub-district and main scrambler search cell, portable terminal can only search frequency and the consistent unique sub-district of main scrambler with the candidate sub-district, in scene two, can only search second sub-district, the 3rd sub-district and the 4th sub-district according to such way of search, and second sub-district, the 3rd sub-district and the 4th sub-district all can not be resident, so can more effectively enlarge the scope of Cell searching according to the frequency search of historical sub-district, improve the efficient of Cell searching.
Specific embodiment three
Be illustrated in figure 3 as the embodiment of the invention three portable terminal example structure schematic diagrames, this portable terminal comprises candidate search listing memory cell 11, record cell 12 and search unit 13, and the candidate search listing is connected with search listing 13 with record cell 12 respectively.Wherein, candidate search listing memory cell 11 is used to store the candidate search listing; Record cell 12 is used for historical cell frequency is recorded candidate search listing memory cell 11, and historical cell frequency is the frequency of adjacent area of the sub-district of the frequency of sub-district of the resident mistake of this portable terminal and/or the resident mistake of this portable terminal; Search unit 13 be used for can be resident according to the frequency of the candidate sub-district of candidate search listing memory cell 11 storage and the search of main scrambler the sub-district, the candidate sub-district comprises the adjacent area of the sub-district that sub-district that described portable terminal is last resident and/or described portable terminal are last resident; If search is less than sub-district that can be resident, then according to the historical cell frequency in the candidate search listing memory cell 11, the sub-district that search can be resident.。
Record cell 12 specifically be used for when portable terminal resident behind the sub-district, in portable terminal with the frequency record of the adjacent area of the sub-district of the frequency of the sub-district of resident mistake and/or resident mistake in candidate search listing memory cell 11.
This record cell 12 also is used at portable terminal resident behind the sub-district, and the frequency and the main scrambler of the adjacent area of the frequency of the current resident sub-district of portable terminal and main scrambler and current persistent district recorded in the candidate search listing memory cell 11.
The portable terminal that the embodiment of the invention provides, with the frequency record of historical sub-district in the candidate search listing, when portable terminal needs search cell, if according to the frequency of the candidate sub-district of writing down in the candidate search listing and the search of main scrambler during less than suitable cell that can be resident, frequency according to historical sub-district, whether the search history sub-district can be resident, can enlarge the scope of Cell searching like this, thereby effectively improves the efficient of Cell searching
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (7)
1, a kind of small region search method is characterized in that, comprising:
Historical cell frequency is recorded in the candidate search listing of portable terminal, described historical cell frequency is the frequency of adjacent area of the sub-district of the frequency of sub-district of the resident mistake of described portable terminal and/or the resident mistake of described portable terminal;
If according to the frequency and the main scrambler of the candidate sub-district of writing down in the candidate search listing, search is less than sub-district that can be resident, then according to the historical cell frequency in the described candidate search listing, and the sub-district that search can be resident; Described candidate sub-district comprises the adjacent area of the sub-district that sub-district that described portable terminal is last resident and/or described portable terminal are last resident.
2, method according to claim 1 is characterized in that, specifically comprises in the described candidate search listing that historical cell frequency is recorded portable terminal:
When portable terminal resident behind the sub-district, in described portable terminal with the frequency record of the adjacent area of the sub-district of the frequency of the sub-district of resident mistake and/or resident mistake in described candidate search listing.
3, method according to claim 1 and 2 is characterized in that, also comprise, according to the historical cell frequency in the described candidate search listing, search can be resident the sub-district after, portable terminal is resident;
Portable terminal records the frequency and the main scrambler of the adjacent area of the frequency of current resident sub-district and main scrambler and current persistent district in the described candidate search listing.
4, method according to claim 1 is characterized in that, if according to the frequency of the candidate sub-district of writing down in the described candidate search listing and main scrambler search can be resident the sub-district after, reside in described sub-district that can be resident.
5, a kind of portable terminal is characterized in that, comprising:
Candidate search listing memory cell is used to store the candidate search listing;
Record cell is used for historical cell frequency is recorded described candidate search listing memory cell, and described historical cell frequency is the frequency of adjacent area of the sub-district of the frequency of sub-district of the resident mistake of described portable terminal and/or the resident mistake of described portable terminal;
Search unit, be used for the frequency of the candidate sub-district of storing according to described candidate search listing memory cell and the sub-district that the search of main scrambler can be resident, described candidate sub-district comprises the adjacent area of the sub-district that sub-district that described portable terminal is last resident and/or described portable terminal are last resident; If search is less than sub-district that can be resident, then according to the historical cell frequency in the described candidate search listing memory cell, the sub-district that search can be resident.
6, portable terminal according to claim 5, it is characterized in that, described record cell specifically be used for when described portable terminal resident behind the sub-district, in described portable terminal with the frequency record of the adjacent area of the sub-district of the frequency of the sub-district of resident mistake and/or resident mistake to described candidate search listing memory cell.
7, according to claim 5 or 6 described portable terminals, it is characterized in that, described record cell also is used at described portable terminal resident behind the sub-district, and the frequency and the main scrambler of the adjacent area of the frequency of the current resident sub-district of described portable terminal and main scrambler and current persistent district recorded described candidate search listing memory cell.
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| CNA2009101519310A CN101600242A (en) | 2009-07-06 | 2009-07-06 | Small region search method and portable terminal |
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| CNA2009101519310A CN101600242A (en) | 2009-07-06 | 2009-07-06 | Small region search method and portable terminal |
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Cited By (11)
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| WO2010083779A1 (en) * | 2009-01-23 | 2010-07-29 | 华为技术有限公司 | Mobility management method and mobile terminal |
| WO2012024924A1 (en) * | 2010-08-27 | 2012-03-01 | 中兴通讯股份有限公司 | Cell reselection method in time division-synchronous code division multiple access (td-scdma) network and terminal equipment |
| CN104812023A (en) * | 2014-01-24 | 2015-07-29 | 中国联合网络通信集团有限公司 | Small-bandwidth universal mobile telecommunications system (UMTS) cell search method, user equipment and communication device |
| CN105592498A (en) * | 2013-04-22 | 2016-05-18 | 青岛海信移动通信技术股份有限公司 | Method and user terminal for reporting frequency-sweeping information |
| WO2016172873A1 (en) * | 2015-04-29 | 2016-11-03 | 华为技术有限公司 | Method and apparatus for determining target cell |
| TWI577231B (en) * | 2014-09-12 | 2017-04-01 | 電信科學技術研究院 | A device-to-device communication method and apparatus |
| CN107548117A (en) * | 2016-06-26 | 2018-01-05 | 联芯科技有限公司 | Network selection method and terminal device after a kind of terminal device off-grid |
| CN108848547A (en) * | 2018-06-12 | 2018-11-20 | Oppo广东移动通信有限公司 | WiFi scan method, device, mobile terminal and computer-readable medium |
| WO2019196912A1 (en) * | 2018-04-12 | 2019-10-17 | 华为技术有限公司 | Cell search method and communication apparatus |
| CN110958655A (en) * | 2019-11-21 | 2020-04-03 | 维沃移动通信有限公司 | Network searching method and electronic equipment |
| CN114641053A (en) * | 2022-02-17 | 2022-06-17 | 北京四季豆信息技术有限公司 | Cell selection method and device and electronic equipment |
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| WO2010083779A1 (en) * | 2009-01-23 | 2010-07-29 | 华为技术有限公司 | Mobility management method and mobile terminal |
| WO2012024924A1 (en) * | 2010-08-27 | 2012-03-01 | 中兴通讯股份有限公司 | Cell reselection method in time division-synchronous code division multiple access (td-scdma) network and terminal equipment |
| CN102378291A (en) * | 2010-08-27 | 2012-03-14 | 中兴通讯股份有限公司 | Cell reselection method and terminal device in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) network |
| CN105592498B (en) * | 2013-04-22 | 2019-12-24 | 青岛海信移动通信技术股份有限公司 | Method for reporting sweep frequency information and user terminal |
| CN105592498A (en) * | 2013-04-22 | 2016-05-18 | 青岛海信移动通信技术股份有限公司 | Method and user terminal for reporting frequency-sweeping information |
| CN104812023A (en) * | 2014-01-24 | 2015-07-29 | 中国联合网络通信集团有限公司 | Small-bandwidth universal mobile telecommunications system (UMTS) cell search method, user equipment and communication device |
| CN104812023B (en) * | 2014-01-24 | 2018-10-12 | 中国联合网络通信集团有限公司 | Method, user equipment and the communication equipment of small bandwidth UMTS cell searchings |
| TWI577231B (en) * | 2014-09-12 | 2017-04-01 | 電信科學技術研究院 | A device-to-device communication method and apparatus |
| US11019629B2 (en) | 2014-09-12 | 2021-05-25 | China Academy Of Telecommunications Technology | Device-to-device communication method and apparatus |
| WO2016172873A1 (en) * | 2015-04-29 | 2016-11-03 | 华为技术有限公司 | Method and apparatus for determining target cell |
| CN106664632A (en) * | 2015-04-29 | 2017-05-10 | 华为技术有限公司 | Method and apparatus for determining target cell |
| US10397846B2 (en) | 2015-04-29 | 2019-08-27 | Huawei Technologies Co., Ltd. | Method and apparatus for determining target cell |
| CN107548117B (en) * | 2016-06-26 | 2020-05-08 | 联芯科技有限公司 | Network selection method after terminal equipment offline and terminal equipment |
| CN107548117A (en) * | 2016-06-26 | 2018-01-05 | 联芯科技有限公司 | Network selection method and terminal device after a kind of terminal device off-grid |
| WO2019196912A1 (en) * | 2018-04-12 | 2019-10-17 | 华为技术有限公司 | Cell search method and communication apparatus |
| US11310729B2 (en) | 2018-04-12 | 2022-04-19 | Huawei Technologies Co., Ltd. | Cell search method and communications apparatus |
| CN108848547A (en) * | 2018-06-12 | 2018-11-20 | Oppo广东移动通信有限公司 | WiFi scan method, device, mobile terminal and computer-readable medium |
| CN110958655A (en) * | 2019-11-21 | 2020-04-03 | 维沃移动通信有限公司 | Network searching method and electronic equipment |
| CN114641053A (en) * | 2022-02-17 | 2022-06-17 | 北京四季豆信息技术有限公司 | Cell selection method and device and electronic equipment |
| CN114641053B (en) * | 2022-02-17 | 2024-02-06 | 芯象半导体科技(北京)有限公司 | Cell selection method and device and electronic equipment |
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Open date: 20091209 |