CN101980571A - 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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- CN101980571A CN101980571A CN201010506080XA CN201010506080A CN101980571A CN 101980571 A CN101980571 A CN 101980571A CN 201010506080X A CN201010506080X A CN 201010506080XA CN 201010506080 A CN201010506080 A CN 201010506080A CN 101980571 A CN101980571 A CN 101980571A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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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, be when the NAS of terminal protocol stack layer begins to look for net, the employed frequency point information of current PLMN is added in the registered cell list (Strored cell list) of terminal, so that accelerate the speed of capture terminal network.
Background technology
At present, terminal is powering on and from OOS (Out Of Service) zone to the process that has the signal area to catch network as shown in Figure 1:
The NAS layer of terminal protocol stack sends the net request of looking for to the AS of terminal protocol stack layer after obtaining current PLMN.NAS checks in the terminal whether RPLMN (the PLMN that registered last time is arranged, be stored in the SIM/USIM card), if do not have, then select HPLMN (Home PLMN, be stored in the SIM/USIM card), NAS sends RRC PLMN Search REQ message, the available cell that request AS searches for current PLMN to AS then.
The AS layer receive the NAS layer look for net request after, on the frequency range of terminal support, carry out full frequency band scanning, with the search available cell.AS is in search during frequency, the frequency of registering before the search terminal at first, if search available cell, AS sends RRC PLMN serarch CNF message to NAS, and notice NAS has found proper cell.If do not search or the memory of terminal in not before registered cell information, the frequency range that the AS layer can be supported according to terminal, carry out the full frequency band search, this process can spend the long time, if found available cell, AS can notify NAS to find proper cell, if do not find, AS can send to NAS with 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 " that stores in the SIM card.
3, " the Operator Controlled PLMN Selector with Access Technology " that stores in the SIM card.
4, select the network of other high signal qualitys at random.
5, select other network from high to low according to signal strength signal intensity.
According to the method for catching the sub-district at present, if the user starts shooting first or the user move to other places or user from the OOS zone to the zone that signal is arranged, because the information of registered network before storage is not shut down in the terminal, perhaps because the network information of storage and the current network information are inconsistent, capture terminal to the time of network can be very long.And a general operator only can use certain the several frequency in the frequency range, a hundreds of frequency of whole frequency all can not used, so terminal can spend the obsolete at all frequency of most of the time removal search operator.
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 in the terminal network information of the information of registered network before the storage shutdown or storage and current network information capture terminal long problem of network time when inconsistent better.
According to an aspect of the present invention, provide a kind of quickening small region search method, it is characterized in that this method may further comprise the steps:
(A) during the terminal searching subdistrict frequency point, search the employed frequency point information of current PLMN in the operator's frequency point information tabulation from be stored in terminal;
(B) if find the employed frequency point information of current PLMN in step (A), the employed frequency point information of current PLMN that then will find is saved in the registered cell list of terminal, and searches for the available cell frequency in described registered cell list.
(C), then in registered cell list, search for the available cell frequency if in step (A), do not find the employed frequency point information of current PLMN.
The step of this method (A) is specially: the NAS layer of terminal protocol stack reads the current PLMN that is stored in the terminal SIM/USIM card; Search the frequency point information that current PLMN uses operator's frequency point information tabulation of NAS layer in being stored in terminal.
The step of this method (B) is specially: the AS layer of NAS course terminal protocol stack sends the interpolation request of adding the employed frequency point information of current PLMN in registered cell list; The employed frequency point information of PLMN of adding before in the registered cell list is removed in the interpolation request of AS layer response NAS layer, and the employed frequency point information of current PLMN that NAS is sent is saved in the described registered cell list; NAS course AS layer sends the net request of looking for; The net of looking for of AS layer response NAS layer is asked, and searches for the available cell frequency from registered cell list, and Search Results is sent to the NAS layer.
In this method from the registered cell list of preserving the employed frequency point information of current PLMN search available cell frequency be specially: the frequency of registering before the search terminal at first, search for the employed frequency of current PLMN again.
The step of this method (C) is specially: NAS course AS layer sends the net request of looking for; The net of looking for of AS layer response NAS layer is asked, and searches for the available cell frequency from registered cell list, and Search Results is sent to the NAS layer.
This method also is included in carries out the full frequency band search step when not searching the available cell frequency in the described registered cell list, be specially: carry out full frequency band scanning on the frequency range of terminal support, with search available cell frequency.
This method also comprises the step of upgrading operator's frequency point information tabulation, specifically can realize in the following manner: on the frequency range of terminal support, carry out the full frequency band search, if search the available cell frequency, then the available cell frequency that searches is added in the operator's frequency point information tabulation that is stored in the terminal, to upgrade the frequency point information tabulation of described operator; Terminal reads the frequency point information of the alien frequencies neighbor cell of current area from the message that the base station sends, and adds in the operator's frequency point information tabulation that is stored in the terminal, to upgrade the frequency point information tabulation 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 tabulation of the merchant of battalion frequency point information is used to preserve the employed frequency point information of operator;
Registered cell list is used to preserve the frequency point information and the employed frequency point information of current PLMN of registered sub-district;
Control module is used for searching the employed frequency point information of current PLMN from the frequency point information tabulation of described operator, and is saved in the registered cell list;
Search module is used for from registered cell list search available cell frequency.
This mobile communication terminal also comprises: update module is used for upgrading the frequency point information that is kept at operator's frequency point information tabulation.
This mobile communication terminal also comprises: the full frequency band search module, when search module did not search the available cell frequency, full frequency band scanning on the frequency range that terminal is supported was to search the available cell frequency.
Compared with prior art, beneficial effect of the present invention is: owing to preserved the employed frequency point information of current PLMN in registered cell list, so saved starting up of terminal or when the OOS zone moves to the signal area, caught time of network, also reduce simultaneously the power consumption of terminal, improved the stand-by time of terminal.
Description of drawings
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 invention;
Fig. 3 is the flow chart of the automatic renewal operator frequency point information that provides of the embodiment of the invention;
Fig. 4 is the structural representation of the mobile communication terminal that provides of the embodiment of the invention;
Fig. 5 is operator's frequency point information tabulation schematic diagram that the embodiment of the invention provides;
Embodiment
, should be appreciated that following illustrated preferred embodiment only is used for description and interpretation the present invention, and be not used in qualification the present invention a preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing.
The protocol stack of portable terminal generally is divided into NAS layer and AS layer, and NAS mainly is responsible for and core net is carried out protocol interaction, and AS mainly is 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.Got back to service area after terminal powers on or from no service area, NAS at first reads current PLMN from the SIM/USIM card of terminal, from operator's frequency point information tabulation, search the employed frequency of current PLMN (Fig. 5 is seen in operator's frequency point information tabulation) then, if find, then NAS notice AS adds the employed frequency point information of current PLMN in the registered cell list to, and NAS sends the net request of looking for to AS more then.If do not find, then NAS directly sends the net request of looking for to AS.
Main improvement of the present invention is the interface that has increased by and NAS communication at the AS layer, makes AS to receive the employed frequency point information of current PLMN from NAS, and the employed frequency point information of current PLMN is added in the registered cell list.The AS layer is when adding frequency point information in registered cell list, at first remove the employed frequency point information of PLMN of adding before in the registered cell list, and then preserve the employed frequency point information of current PLMN and notify NAS to add the frequency point information success.After NAS receives the notice of AS, send the net request of looking for to AS.
Fig. 2 is the schematic diagram of the capture terminal network that provides of the embodiment of the 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 no coverage has entered into the coverage, and NAS checks at first in the SIM/USIM card of terminal whether RPLMN is arranged, if having, then obtains RPLMN, if do not have, then reads the HPLMN in the SIM/USIM card.
Step 202:NAS searches the employed frequency point information of current PLMN in operator's frequency point information tabulation.What preserve in operator's frequency point information tabulation is the employed frequency point information of operator.NAS searches the employed frequency point information of current PLMN in operator's frequency point information tabulation, if find, then execution in step 203, otherwise, then jump to step 206.
Step 203:NAS request AS adds the employed frequency point information of current PLMN in registered cell list.NAS sends RRC UPDATE CELLLIST REQ message to AS, and request AS increases the employed frequency point information of current PLMN in registered cell list.
The employed frequency point information of current PLMN is preserved in the request of step 204:AS response NAS in registered cell list.After AS receives the RRC UPDATE CELL LIST REQ message of NAS, at first remove the employed frequency point information of PLMN of adding before in the registered cell list, then the employed frequency point information of current PLMN is saved in the registered cell list.
Step 205:AS sends to NAS and preserves successful message.AS has preserved the employed frequency point information of current PLMN in registered cell list after, return RRC UPDATE CELLIST CNF message to NAS, notice NAS preserves successfully.
Step 206:NAS sends the net request of looking for to AS.NAS sends RRC PLMN Search REQ message to AS, and request AS begins to search for the available cell frequency.
Step 207:AS begins to search for the available cell frequency.AS receive NAS look for net request after, search available cell frequency in registered available cell tabulation.The frequency that AS at first once registered on the search terminal in registered cell list, if this frequency is the frequency of available cell, then execution in step 208, otherwise, the employed frequency point information of the current PLMN of search in registered cell list, if search the available cell frequency in the employed frequency point information of current PLMN, then execution in 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.This moment, whole cell search process was finished, and following steps are no longer carried out.
Step 209:AS carries out the full frequency band search on the frequency range of terminal support.
Step 210:AS sends the full frequency band Search Results to NAS.If AS has searched available cell when carrying out the full frequency band search on the frequency range of terminal support, AS sends RRC PLMN Search CNF message to NAS, and notice NAS has successfully searched available cell.If also do not find available cell this moment, AS also can send RRC PLMN Search CNF message to NAS, and notice NAS does not find available cell, and with the cell notification NAS of current existence.
Fig. 3 is the flow chart of the automatic renewal operator frequency point information that provides of the embodiment of the invention, as shown in Figure 3, at first NAS searches for the frequency of available cell, if search available cell, then further obtain the broadcast of base station, from broadcast, read the frequency point information of the alien frequencies neighbor cell of current area, thereby upgrade operator's frequency point information tabulation.If NAS does not search available cell, then carry out the full frequency band search.In the process of full frequency band search, if capture the sub-district, then the frequency with the sub-district that captures adds in operator's frequency point information tabulation, 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 upgrade operator's frequency point information tabulation.If the full frequency band search does not capture the sub-district yet, then carry out the arbitrary cells search.
After terminal powers on, AS is search available cell in registered cell list (stored cell list) at first, if search, then terminal is looked for and being netted successfully, and then can obtain broadcast sib11/sib12/measurement control message (under the CELL_DCH state, can receive this message), and from broadcast, read the frequency point information of the alien frequencies neighbor cell of current available cell from the base station.Whether the frequency point information of checking the alien frequencies neighbor cell exists in operator's frequency point information tabulation, if there is no, then the frequency point information of alien frequencies neighbor cell is added in operator's frequency point information tabulation.
If NAS searches in registered cell list less than available cell, AS can carry out full frequency band scanning in the frequency range of terminal support, this moment is if search available cell, this sub-district frequency points corresponding is not certainly in operator's frequency point information tabulation, so directly the available cell frequency that the full frequency band search is obtained adds in operator's frequency point information tabulation.After terminal is looked for and is netted successfully, can obtain the broadcast of base station and measure control messages, and from broadcast with measure the frequency point information that reads the alien frequencies neighbor cell of current available cell the control messages, whether the frequency point information of judging the alien frequencies neighbor cell exists in operator's frequency point information tabulation, if there is no, then the frequency point information of alien frequencies neighbor cell is added in operator's frequency point information tabulation.If available cell is not found in the full frequency band search yet, then carry out the arbitrary cells search.
In addition, when terminal the sub-district gravity treatment takes place or switches, also need, measure the renewal that control messages is carried out operator's frequency point information tabulation according to broadcast.Renewal process when the 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 invention, and as shown in Figure 4, a kind of mobile communication terminal of accelerating Cell searching comprises: operator's frequency point information tabulation 1, control module 2, search module 3, registered cell list 4.The merchant of battalion frequency point information tabulation 1 is used to preserve the employed frequency point information of operator; Registered cell list 4 is used to preserve the frequency point information and the employed frequency point information of current PLMN of registered sub-district; Control module 2 is used for searching the frequency point information that current PLMN uses from the frequency point information tabulation of described operator, and is saved in the registered cell list; Search module 3 is used for the frequency point information search available cell frequency that uses from the current PLMN that registered cell list is preserved.This mobile communication terminal also comprises: update module is used for upgrading the frequency point information that is kept at operator's frequency point information tabulation; The full frequency band search module, when search was less than available cell in registered cell list, the full frequency band search module carried out the full frequency band search in the available frequency band of terminal support, to search available cell.
In sum, the present invention is by having preserved the employed frequency point information of current PLMN in registered cell list, save starting up of terminal or when no coverage moves to the coverage, caught time of network, 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 (10)
1. method of accelerating Cell searching is characterized in that this method may further comprise the steps:
(A) during the terminal searching subdistrict frequency point, search the employed frequency point information of current public land mobile network PLMN in the operator's frequency point information tabulation from be stored in terminal;
(B) if in step (A), find the employed frequency point information of current PLMN, the employed frequency point information of current PLMN that then will find is saved in the registered cell list of terminal, and in the described registered cell list of preserving the frequency point information that current PLMN uses search available cell frequency.
(C), then in registered cell list, search for the available cell frequency if in step (A), do not find the employed frequency point information of current PLMN.
2. quickening small region search method according to claim 1 is characterized in that described step (A) comprising:
The NAS layer of terminal protocol stack reads the current PLMN that is stored in the terminal SIM/USIM card;
Search the frequency point information that current PLMN uses operator's frequency point information tabulation of NAS layer in being stored in terminal.
3. quickening small region search method according to claim 2 is characterized in that described step (B) comprising:
The AS layer of NAS course terminal protocol stack sends the interpolation request of adding the employed frequency point information of current PLMN in registered cell list;
The employed frequency point information of PLMN of adding before in the registered cell list is removed in the interpolation request of AS layer response NAS layer, and the employed frequency point information of current PLMN that NAS is sent is saved in the described registered cell list;
NAS course AS layer sends the net request of looking for;
The net of looking for of AS layer response NAS layer is asked, and searches for the available cell frequency from the registered cell list of preserving the employed frequency point information of current PLMN, and Search Results is sent to the NAS layer.
4. quickening small region search method according to claim 3 is characterized in that the described available cell frequency of searching for comprises from the registered cell list of preserving the employed frequency point information of current PLMN:
At first the frequency of registering before the search terminal is searched for the employed frequency of current PLMN again.
5. quickening small region search method according to claim 2 is characterized in that described step (C) comprising:
NAS course AS layer sends the net request of looking for;
The net of looking for of AS layer response NAS layer is asked, and searches for the available cell frequency from registered cell list, and Search Results is sent to the NAS layer.
6. quickening small region search method according to claim 1 is characterized in that also being included in and carries out the full frequency band search step when not searching the available cell frequency in the described registered cell list, comprising:
On the frequency range of terminal support, carry out full frequency band scanning, with search available cell frequency.
7. according to each described quickening small region search method of claim 1 to 6, it is characterized in that described method also comprises the step of upgrading operator's frequency point information tabulation, comprising:
On the frequency range of terminal support, carry out the full frequency band search,, then the available cell frequency that searches is added in the operator's frequency point information tabulation that is stored in the terminal, to upgrade the frequency point information tabulation of described operator if search the available cell frequency;
Terminal reads the frequency point information of the alien frequencies neighbor cell of current area from the message that the base station sends, and adds in the operator's frequency point information tabulation that is stored in the terminal, to upgrade the frequency point information tabulation of described operator.
8. mobile communication terminal of accelerating Cell searching is characterized in that comprising:
Operator's frequency point information tabulation is used to preserve the employed frequency point information of operator;
Registered cell list is used to preserve the frequency point information and the employed frequency point information of current PLMN of registered sub-district;
Control module is used for searching the employed frequency point information of current PLMN from the frequency point information tabulation of described operator, and is saved in the registered cell list;
Search module is used for from registered cell list search available cell frequency.
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 is used for upgrading the frequency point information that is kept at operator's frequency point information tabulation.
10. the mobile communication terminal of quickening Cell searching according to claim 8 is characterized in that also comprising:
The full frequency band search module, when search module did not search the available cell frequency, full frequency band scanning on the frequency range that terminal is supported was to search the available cell frequency.
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 |
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| 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 true CN101980571A (en) | 2011-02-23 |
| CN101980571B 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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| WO2012048556A1 (en) | 2012-04-19 |
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