CN101980571B - Method for accelerating cell search and mobile communication terminal - Google Patents
Method for accelerating cell search and mobile communication terminal Download PDFInfo
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- CN101980571B CN101980571B CN201010506080.XA CN201010506080A CN101980571B CN 101980571 B CN101980571 B CN 101980571B CN 201010506080 A CN201010506080 A CN 201010506080A CN 101980571 B CN101980571 B CN 101980571B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The invention discloses a method for accelerating cell search and a mobile communication terminal. When a terminal searches a cell frequency point, frequency point information of a current public land mobile network (PLMN) is searched in an operator frequency point information list of the terminal; the found frequency point information is added into a registered cell list of the terminal; and an available cell frequency point is searched in the registered cell list. The frequency point information used by the current PLMN is saved in the registered cell list, so an available cell can be quickly found when the terminal searches the network. Therefore, the speed for the terminal to capture the network is greatly improved, the power consumption of the terminal is also reduced, and the standby time of the terminal is prolonged.
Description
Technical field
The present invention relates to a kind of digital communication method and terminal, be particularly related to a kind of method and mobile communication terminal of accelerating Cell searching, specifically, when the NAS of terminal protocol stack layer starts to look for net, the frequency point information that current PLMN is used is added in the registered cell list (Strored cell list) of terminal, so that increasing terminal is caught the speed of network.
Background technology
At present, terminal is in the process that powers on and catch network from OOS (Out Of Service) Dao You signal area, region as shown in Figure 1:
The NAS layer of terminal protocol stack is looked for net request to the AS layer transmission of terminal protocol stack after obtaining current PLMN.NAS checks in terminal whether have the RPLMN (PLMN registering last time, be stored in SIM/USIM card), if do not had, select HPLMN (Home PLMN, be stored in SIM/USIM card), then NAS sends RRC PLMN Search REQ message to AS, and request AS searches for the available cell of current PLMN.
AS layer is received looking for after net request of NAS layer, carries out full frequency band scanning, to search for available cell in the frequency range of terminal support.AS is in search during frequency, the frequency of first registering before search terminal, if search available cell, AS sends RRC PLMN serarch CNF message to NAS, and notice NAS has found suitable community.If do not search or the memory of terminal in not before registered cell information, the frequency range that AS layer can be supported according to terminal, carry out full frequency band search, this process can spend the long time, if found available cell, AS can notify NAS to find suitable community, if do not found, AS can send to NAS by the network of current existence, and NAS selects an available PLMN according to the priority of PLMN.The priority orders of PLMN is as follows:
1、HPLMN。
2, " the USER Controlled PLMN Selector with Access Technology " storing in SIM card.
3, " the Operator Controlled PLMN Selector with Access Technology " storing in SIM card.
4, select at random the network of other high signal qualitys.
5, according to signal strength signal intensity, select from high to low other network.
According to the method for catching at present community, if user starts shooting first or user moves to other places or user from OOS region to the region that has signal, owing to storing the information of the front registered network of shutdown in terminal, or because the network information and the current network information of storage are inconsistent, capture terminal to the time of network can be very long.And general Yi Ge operator only can be used certain the several frequency in a frequency range, the hundreds of of a whole frequency range frequency all can not used, so terminal can spend most of the time removal search operator obsolete frequency at all.
Summary of the invention
The object of the present invention is to provide a kind of method and mobile communication terminal of accelerating Cell searching, can solve better in terminal the information of registered network before storage shutdown or the network information of storage and current network information capture terminal long problem of network time when inconsistent.
According to an aspect of the present invention, provide a kind of quickening small region search method, it is characterized in that the method comprises the following steps:
(A), during terminal searching subdistrict frequency point, from be stored in the operator's frequency point information list terminal, search the frequency point information that current PLMN is used;
(B) if find the frequency point information that current PLMN is used in step (A), the frequency point information of the current PLMN finding being used is saved in the registered cell list of terminal, and searches for available cell frequency in described registered cell list.
(C), if do not find the frequency point information that current PLMN is used in step (A), in registered cell list, search for available cell frequency.
The step of the method (A) is specially: the NAS layer of terminal protocol stack reads the current PLMN being stored in terminal SIM/USIM card; Operator's frequency point information list of NAS layer in being stored in terminal, search the frequency point information that current PLMN is used.
The step of the method (B) is specially: NAS layer sends to the interpolation request of adding the frequency point information that current PLMN uses in registered cell list to the AS layer of terminal protocol stack; The interpolation request of AS layer response NAS layer, removes the frequency point information that in registered cell list, the PLMN of interpolation is used before, and the frequency point information that the current PLMN that NAS is sent is used is saved in described registered cell list; NAS layer sends to AS layer the net request of looking for; The net of looking for of AS layer response NAS layer is asked, and searches for available cell frequency, and Search Results is sent to NAS layer from registered cell list.
In the method, from preserve the registered cell list of the frequency point information that current PLMN uses, searching for available cell frequency is specially: the frequency of first registering before search terminal, then search for the frequency that current PLMN is used.
The step of the method (C) is specially: NAS layer sends to AS layer the net request of looking for; The net of looking for of AS layer response NAS layer is asked, and searches for available cell frequency, and Search Results is sent to NAS layer from registered cell list.
While searching available cell frequency in the registered cell list described in the method is also included in, do not carry out full frequency band search step, be specially: in the frequency range of terminal support, carry out full frequency band scanning, to search for available cell frequency.
The method also comprises the more step of new operators frequency point information list, specifically can realize in the following manner: in the frequency range of terminal support, carry out full frequency band search, if search available cell frequency, the available cell frequency searching is added in the operator's frequency point information list being stored in terminal, to upgrade the frequency point information list of described operator; The message that terminal sends from base station, read the frequency point information of the alien frequencies neighbor cell of current area, and add in the operator's frequency point information list being stored in terminal, to upgrade the frequency point information list of described operator.
According to a further aspect in the invention, provide a kind of mobile communication terminal of accelerating Cell searching, it is characterized in that comprising:
The list of the business of battalion frequency point information, the frequency point information of using for preserving operator;
Registered cell list, for preserving the frequency point information of registered community and the frequency point information that current PLMN is used;
Control module, searches for the operator's frequency point information list from described the frequency point information that current PLMN is used, and is saved in registered cell list;
Search module, for searching for available cell frequency from registered cell list.
This mobile communication terminal also comprises: update module, and for upgrading the frequency point information that is kept at operator's frequency point information list.
This mobile communication terminal also comprises: full frequency band search module, when search module does not search available cell frequency, full frequency band scanning in the frequency range of supporting in terminal, to search available cell frequency.
Compared with prior art, beneficial effect of the present invention is: owing to having preserved the frequency point information that current PLMN is used in registered cell list, so saved starting up of terminal or caught time of network when OOS region move to signal area, also reduced the power consumption of terminal, improved the stand-by time of terminal simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the capture terminal network that provides of prior art;
Fig. 2 is the schematic diagram of the capture terminal network that provides of the embodiment of the present invention;
Fig. 3 is the automatic more flow chart of new operators frequency point information that the embodiment of the present invention provides;
Fig. 4 is the structural representation of the mobile communication terminal that provides of the embodiment of the present invention;
Fig. 5 is operator's frequency point information list schematic diagram that the embodiment of the present invention provides;
Embodiment
Below in conjunction with accompanying drawing, to a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment, only for description and interpretation the present invention, is not intended to limit the present invention.
The protocol stack of mobile terminal is generally divided into NAS layer and AS layer, and NAS is mainly responsible for and core net is carried out protocol interaction, and AS is mainly responsible for carrying out alternately with base station and base station controller, and eats dishes without rice or wine to connect for NAS sets up.After terminal powers on or from having got back to service area without service area, first NAS reads current PLMN from the SIM/USIM card of terminal, then from operator's frequency point information list, search the frequency (Fig. 5 is shown in operator's frequency point information list) that current PLMN is used, if found, the frequency point information that NAS notice AS is used current PLMN is added in registered cell list, and then NAS sends to AS the net request of looking for again.If do not found, NAS directly sends to AS the net request of looking for.
Main improvement of the present invention is at AS layer, to have increased the interface of and NAS communication, make AS to receive the frequency point information that current PLMN is used from NAS, and the frequency point information that current PLMN is used is added in registered cell list.AS layer when adding frequency point information in registered cell list, first remove in registered cell list before the frequency point information used of the PLMN that adds, and then preserve the frequency point information that current PLMN uses and notify NAS to add frequency point information success.NAS receives after the notice of AS, to AS, sends the net request of looking for.
Fig. 2 is the schematic diagram of the capture terminal network that provides of the embodiment of the present invention, and as shown in Figure 2, concrete small region search method is as follows:
Step 201:NAS obtains current PLMN.Terminal powers on or when having entered into coverage without coverage, and first NAS checks in the SIM/USIM card of terminal whether have RPLMN, if had, obtains RPLMN, if do not had, reads the HPLMN in SIM/USIM card.
Step 202:NAS searches the frequency point information that current PLMN is used in operator's frequency point information list.What in operator's frequency point information list, preserve is the frequency point information that operator is used.In the frequency point information list of NAS operator, search the frequency point information that current PLMN is used, if found, perform step 203, otherwise, jump to step 206.
Step 203:NAS request AS adds the frequency point information that current PLMN is used in registered cell list.NAS sends RRC UPDATE CELLLIST REQ message to AS, and request AS increases the frequency point information that current PLMN is used in registered cell list.
The frequency point information that current PLMN is used is preserved in the request of step 204:AS response NAS in registered cell list.AS receives after the RRC UPDATE CELL LIST REQ message of NAS, first removes the frequency point information that the PLMN adding before in registered cell list is used, and the frequency point information of then current PLMN being used is saved in registered cell list.
Step 205:AS sends and preserves successful message to NAS.AS has preserved after the frequency point information that current PLMN uses in registered cell list, to NAS, returns to RRC UPDATE CELLIST CNF message, and notice NAS preserves successfully.
Step 206:NAS sends to AS the net request of looking for.NAS sends RRC PLMN Search REQ message to AS, and request AS starts to search for available cell frequency.
Step 207:AS starts to search for available cell frequency.AS receives looking for after net request of NAS, searches for available cell frequency in the list of registered available cell.The frequency that first AS once registered in search terminal in registered cell list, if this frequency is the frequency of available cell, perform step 208, otherwise, in registered cell list, search for the frequency point information that current PLMN is used, if search available cell frequency in the frequency point information of using at current PLMN, perform step 208, otherwise, jump to step 209.
Step 208: notice NAS successfully searches available cell.AS sends RRC PLMNSearch CNF message to NAS, and notice NAS has successfully searched available cell.Now whole cell search process completes, and following steps are no longer carried out.
Step 209:AS carries out full frequency band search in the frequency range of terminal support.
Step 210:AS sends full frequency band Search Results to NAS.If AS has searched available cell while carrying out full frequency band search in the frequency range of terminal support, AS sends RRC PLMN Search CNF message to NAS, and notice NAS has successfully searched available cell.If now also do not find available cell, AS also can send RRC PLMN Search CNF message to NAS, and notice NAS does not find available cell, and by the cell notification NAS of current existence.
Fig. 3 is the automatic more flow chart of new operators frequency point information that the embodiment of the present invention provides, as shown in Figure 3, first NAS searches for the frequency of available cell, if search available cell, further obtain the broadcast of base station, from broadcast, read the frequency point information of the alien frequencies neighbor cell of current area, thus more new operators frequency point information list.If NAS does not search available cell, carry out full frequency band search.In the process of full frequency band search, if capture community, the frequency of the community capturing is added in operator's frequency point information list, obtain the broadcast of base station simultaneously, from broadcast, read the frequency point information of the alien frequencies neighbor cell of current area, and then more new operators frequency point information list.If full frequency band search does not capture community yet, carry out arbitrary cells search.
After terminal powers on, AS is search available cell in registered cell list (stored cell list) first, if searched, terminal is looked for and being netted successfully, and then can obtain from base station broadcast sib11/sib12/measurement control message (can receive this message under CELL_DCH state), and from broadcast, read the frequency point information of the alien frequencies neighbor cell of current available cell.Whether the frequency point information of checking alien frequencies neighbor cell exists in operator's frequency point information list, if there is no, the frequency point information of alien frequencies neighbor cell is added in operator's frequency point information list.
If NAS searches for less than available cell in registered cell list, AS can carry out full frequency band scanning in the frequency range of terminal support, if now search available cell, frequency corresponding to this community affirmed in the frequency point information list of Bu operator, so the available cell frequency directly full frequency band search being obtained adds in operator's frequency point information list.After terminal is looked for and is netted successfully, can obtain the broadcast of base station and measure control message, and from broadcast with measure the frequency point information that reads the alien frequencies neighbor cell of current available cell control message, whether the frequency point information that judges alien frequencies neighbor cell exists in operator's frequency point information list, if there is no, the frequency point information of alien frequencies neighbor cell is added in operator's frequency point information list.If full frequency band search, does not find available cell yet, carry out arbitrary cells search.
In addition, when terminal generation cell reselection or switching, also need according to broadcast, measure the renewal that control message carries out operator's frequency point information list.The renewal process when process of upgrading powers on terminal is identical.
Fig. 4 is the structural representation of the mobile communication terminal that provides of the embodiment of the present invention, and as shown in Figure 4, a kind of mobile communication terminal of accelerating Cell searching comprises: operator's frequency point information list 1, control module 2, search module 3, registered cell list 4.The frequency point information that the business of battalion frequency point information list 1 is used for preserving operator; Registered cell list 4, for preserving the frequency point information of registered community and the frequency point information that current PLMN is used; Control module 2, the frequency point information of using for search current PLMN from the frequency point information list of described operator, and be saved in registered cell list; Search module 3, the frequency point information of using for the current PLMN preserving from registered cell list is searched for available cell frequency.This mobile communication terminal also comprises: update module, for upgrading the frequency point information that is kept at operator's frequency point information list; Full frequency band search module, when in registered cell list, search is less than available cell, full frequency band search module carries out full frequency band search in the available frequency band of terminal support, to search available cell.
In sum, the present invention by having preserved the frequency point information that current PLMN is used in registered cell list, save starting up of terminal or caught time of network when moving to coverage without coverage, also reduced the power consumption of terminal simultaneously, improved the stand-by time of terminal.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention, all should be understood to fall into protection scope of the present invention.
Claims (9)
1. accelerate a method for Cell searching, it is characterized in that the method comprises the following steps:
(A), during terminal searching subdistrict frequency point, from be stored in the operator's frequency point information list terminal, search the frequency point information that current public land mobile network PLMN is used;
(B) if find the frequency point information that current PLMN is used from be stored in the operator's frequency point information list terminal, the frequency point information of the current PLMN finding being used is saved in the registered cell list of terminal, and searches for available cell frequency in the described registered cell list of preserving the frequency point information that current PLMN uses;
(C) if do not find the frequency point information that current PLMN is used from be stored in the operator's frequency point information list terminal, in registered cell list, search for available cell frequency;
(D), while not searching available cell frequency in described registered cell list, carry out full frequency band search;
Wherein, described step (B) comprising:
The NAS layer of terminal protocol stack sends to the interpolation request of adding the frequency point information that current PLMN uses in registered cell list to the AS layer of terminal protocol stack;
The interpolation request of AS layer response NAS layer, removes the frequency point information that in registered cell list, the PLMN of interpolation is used before, and the frequency point information that the current PLMN that NAS is sent is used is saved in described registered cell list;
Wherein at AS layer, be provided with the interface of and the communication of NAS layer, make AS layer to receive the frequency point information that current PLMN is used from NAS layer, and the frequency point information that current PLMN is used added in registered cell list.
2. the method for quickening Cell searching according to claim 1, is characterized in that described step (A) comprising:
The NAS layer of terminal protocol stack reads the current PLMN being stored in terminal SIM/USIM card;
Operator's frequency point information list of NAS layer in being stored in terminal, search the frequency point information that current PLMN is used.
3. quickening small region search method according to claim 2, is characterized in that described step (B) also comprises:
NAS layer sends to AS layer the net request of looking for;
AS layer response NAS layer look for net request, from preserve the registered cell list of the frequency point information that current PLMN uses, search for available cell frequency, and Search Results sent to NAS layer.
4. quickening small region search method according to claim 3, is characterized in that describedly from preserve the registered cell list of the frequency point information that current PLMN uses, searching for available cell frequency and comprising:
First the frequency of registering before search terminal, then search for the frequency that current PLMN is used.
5. quickening small region search method according to claim 2, is characterized in that described step (C) comprising:
NAS layer sends to AS layer the net request of looking for;
The net of looking for of AS layer response NAS layer is asked, and searches for available cell frequency, and Search Results is sent to NAS layer from registered cell list.
6. quickening small region search method according to claim 1, is characterized in that described step (D), comprising:
In the frequency range of terminal support, carry out full frequency band scanning, to search for available cell frequency.
7. according to the quickening small region search method described in claim 1 to 6 any one, it is characterized in that described method also comprises the more step of new operators frequency point information list, comprising:
In the frequency range of terminal support, carry out full frequency band search, if search available cell frequency, the available cell frequency searching is added in the operator's frequency point information list being stored in terminal, to upgrade the frequency point information list of described operator;
The message that terminal sends from base station, read the frequency point information of the alien frequencies neighbor cell of current area, and add in the operator's frequency point information list being stored in terminal, to upgrade the frequency point information list of described operator.
8. accelerate a mobile communication terminal for Cell searching, it is characterized in that comprising:
Operator's frequency point information list, the frequency point information of using for preserving operator;
Registered cell list, for preserving the frequency point information of registered community and the frequency point information that current PLMN is used;
Control module during for terminal searching subdistrict frequency point, is searched the frequency point information that current PLMN is used, and is saved in registered cell list from described operator's frequency point information list;
Search module, for searching for available cell frequency from registered cell list;
Full frequency band search module, when search module does not search available cell frequency, full frequency band scanning in the frequency range of supporting in terminal, to search available cell frequency;
Wherein, in the frequency point information list of Ruo Cong operator, find the frequency point information that current PLMN is used, the frequency point information of the current PLMN finding being used is saved in the registered cell list of terminal, and searches for available cell frequency in the described registered cell list of preserving the frequency point information that current PLMN uses;
Wherein, in the frequency point information list of Ruo Weicong operator, find the frequency point information that current PLMN is used, in registered cell list, search for available cell frequency;
Wherein, the NAS layer of terminal protocol stack sends to the interpolation request of adding the frequency point information that current PLMN uses in registered cell list to the AS layer of terminal protocol stack; And the interpolation request of AS layer response NAS layer, remove the frequency point information that in registered cell list, the PLMN of interpolation is used before, the frequency point information that the current PLMN that NAS is sent is used is saved in described registered cell list;
Wherein, at AS layer, be provided with the interface of and the communication of NAS layer, make AS layer to receive the frequency point information that current PLMN is used from NAS layer, and the frequency point information that current PLMN is used added in registered cell list.
9. the mobile communication terminal of quickening Cell searching according to claim 8, is characterized in that the mobile communication terminal of described Cell searching also comprises:
Update module, for upgrading the frequency point information that is kept at operator's frequency point information list.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506080.XA CN101980571B (en) | 2010-10-13 | 2010-10-13 | Method for accelerating cell search and mobile communication terminal |
| PCT/CN2011/072100 WO2012048556A1 (en) | 2010-10-13 | 2011-03-24 | Method and mobile communication terminal for accelerating cell search |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506080.XA CN101980571B (en) | 2010-10-13 | 2010-10-13 | Method for accelerating cell search and mobile communication terminal |
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| CN101980571A CN101980571A (en) | 2011-02-23 |
| CN101980571B true CN101980571B (en) | 2014-12-10 |
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| CN201010506080.XA Active CN101980571B (en) | 2010-10-13 | 2010-10-13 | Method for accelerating cell search and mobile communication terminal |
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| WO (1) | WO2012048556A1 (en) |
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| EP3799478A1 (en) * | 2019-09-24 | 2021-03-31 | Beijing Xiaomi Mobile Software Co., Ltd. | Method, device and system for accessing 5g network |
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| CN101980571B (en) * | 2010-10-13 | 2014-12-10 | 中兴通讯股份有限公司 | Method for accelerating cell search and mobile communication terminal |
| CN102170671B (en) * | 2011-05-30 | 2015-06-03 | 中兴通讯股份有限公司 | Multi-system reselection method and device for cell with CSG cell |
| CN104159247A (en) * | 2013-05-14 | 2014-11-19 | 中兴通讯股份有限公司 | Network searching method, device, terminal and base station |
| CN104185260B (en) * | 2013-05-27 | 2018-01-19 | 北京信威通信技术股份有限公司 | A kind of frequency scanning method of wireless terminal |
| CN104936261A (en) * | 2014-03-21 | 2015-09-23 | 中兴通讯股份有限公司 | Terminal automation network finding method and apparatus |
| CN105338591B (en) * | 2014-08-11 | 2020-11-27 | 中兴通讯股份有限公司 | Method and device for searching high-speed network in high-speed network edge cell |
| CN110177392B (en) * | 2014-11-20 | 2021-08-03 | 华为终端有限公司 | Cell selection method and device |
| CN105792163B (en) * | 2014-12-24 | 2019-12-03 | 联芯科技有限公司 | Frequency sub-band search association table updating method and device, small region search method and device |
| CN106162813A (en) * | 2015-03-24 | 2016-11-23 | 中兴通讯股份有限公司 | A kind of small region search method and device |
| CN106162821A (en) * | 2015-04-27 | 2016-11-23 | 中兴通讯股份有限公司 | NetFind method and device |
| CN106376076A (en) * | 2015-07-20 | 2017-02-01 | 中兴通讯股份有限公司 | Method and terminal for realizing network registration |
| CN105744599A (en) * | 2016-02-29 | 2016-07-06 | 华为技术有限公司 | Cell search method and apparatus, and user equipment |
| CN106888495B (en) * | 2017-02-08 | 2020-01-14 | Oppo广东移动通信有限公司 | Network access method and terminal |
| US20210235365A1 (en) * | 2018-06-06 | 2021-07-29 | Huawei Technologies Co., Ltd. | Communication Method and Apparatus |
| CN109089302B (en) * | 2018-09-28 | 2021-09-21 | 努比亚技术有限公司 | Method and device for realizing cell search, communication terminal and readable storage medium |
| CN109286963A (en) * | 2018-10-22 | 2019-01-29 | 上海移芯通信科技有限公司 | A kind of method for searching network, device and terminal |
| CN110049535B (en) * | 2019-04-15 | 2022-04-15 | 深圳市万普拉斯科技有限公司 | Network searching method, device, equipment and storage medium |
| CN110167004A (en) * | 2019-05-22 | 2019-08-23 | 努比亚技术有限公司 | A kind of network registering method, mobile terminal and computer readable storage medium |
| CN112822670B (en) * | 2019-11-15 | 2023-11-14 | 北京小米移动软件有限公司 | Cell registration method, device, equipment and storage medium |
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| WO2012048556A1 (en) | 2012-04-19 |
| CN101980571A (en) | 2011-02-23 |
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