CN105611603B

CN105611603B - Cell selecting method and device

Info

Publication number: CN105611603B
Application number: CN201410670319.5A
Authority: CN
Inventors: 党淑君
Original assignee: Huawei Device Dongguan Co Ltd
Current assignee: Huawei Device Co Ltd
Priority date: 2014-11-20
Filing date: 2014-11-20
Publication date: 2019-05-07
Anticipated expiration: 2034-11-20
Also published as: CN110177392B; CN110177392A; CN105611603A

Abstract

The invention discloses a kind of cell selecting method and devices, this method comprises: obtaining the country and operator of RPLMN before the shutdown of mobile terminal last time or off-grid；Obtain the national information that mobile terminal is currently located；If the country that mobile terminal is currently located is identical as the country of RPLMN before last time shutdown or off-grid, then obtain the first frequency sweep information, according to the information frequency sweep, the frequency point sets that frequency sweep obtains are ranked up according to the signal strength of frequency point, according to the result after sequence, cell is selected since the frequency point of foremost, first frequency sweep information includes the frequency point information supported of operator of RPLMN before the shutdown of mobile terminal last time or off-grid, or the band information that the operator of RPLMN is supported before the shutdown of mobile terminal last time or off-grid, or the band information that the country of RPLMN is supported before the shutdown of mobile terminal last time or off-grid.In this way, the present invention can reduce the time of web search, reduce the power consumption of web search.

Description

Cell selecting method and device

Technical field

The present invention relates to mobile communication technology fields, more particularly to a kind of cell selecting method and device.

Background technique

Cell searching or cell selection are one of most basic processes of mobile communication system, mobile terminal in initial network entry and It when falling to net, needs to re-search for, cell searching or cell selection will be carried out when re-searching for.

For specific standard, such as global system for mobile communications (Global System for Mobile Communication is abbreviated as GSM), in the prior art, a kind of typical cell search process is as follows:

The frequency range supported first mobile terminal carries out frequency sweep, and the size of power is received according to frequency point, is obtained to frequency sweep Frequency point be ranked up；It attempts to receive broadcast channel one by one according to the sequence of above-mentioned frequency point；Obtain the public affairs carried in broadcast channel Land mobile network (Public Land Mobile Network, be abbreviated as PLMN) information altogether, and judge acquired PLMN Whether (Home Public Land Mobile Network, is abbreviated as with the home public land mobile network network of mobile terminal HPLMN) or registered public land mobile network (Registered Public Land Mobile Network, is abbreviated as RPLMN) unanimously, if unanimously, it tries registered in the frequency point, if it is inconsistent, next frequency point is continued searching, until note Volume success is attempted to complete.

But present inventor has found in long-term research and development, the frequency range that the prior art is supported in mobile terminal More, while in the case where having the frequency point of multiple operators in a frequency range, cell searching spends longer time, consumption compared with More power.

Summary of the invention

The invention mainly solves the technical problem of providing a kind of cell selecting method and devices, can reduce web search Time, while the power consumption of web search can be reduced.

In a first aspect, the present invention provides a kind of cell selecting method, which comprises obtain the shutdown of mobile terminal last time Or before off-grid registered public land mobile network RPLMN national information and operator's informaiton；Obtain the mobile terminal The national information being currently located；If before national and mobile terminal last time shutdown or off-grid that the mobile terminal is currently located The country of RPLMN is identical, then obtains the first frequency sweep information, carries out frequency sweep according to the first frequency sweep information, and to the frequency sweep Obtained frequency point sets are ranked up according to the signal strength of frequency point, and then according to the result after the sequence from the frequency of foremost Point starts to carry out cell selection；Wherein, the first frequency sweep information includes RPLMN before the mobile terminal last time shutdown or off-grid The frequency point information supported of operator or mobile terminal last time shutdown or off-grid before the operator of RPLMN supported The band information that the country of RPLMN is supported before band information or mobile terminal last time shutdown or off-grid.

In the first possible implementation of the first aspect, the country for obtaining the mobile terminal and being currently located After the step of information, further includes: if the country that the mobile terminal is currently located shut down or took off with the mobile terminal last time The country of RPLMN is not identical before netting, then obtains the second frequency sweep information, carries out frequency sweep according to the second frequency sweep information, and by institute The frequency point sets that frequency sweep obtains are stated to be ranked up according to the signal strength of the frequency point, so according to the result after the sequence from The frequency point of foremost starts to carry out cell selection；Wherein, the second frequency sweep information includes that the mobile terminal is currently located The preset operator, country that the frequency point information or the mobile terminal that preset operator, country is supported are currently located is propped up The band information that the country that the band information or the mobile terminal held are currently located is supported.

In the second possible implementation of the first aspect, RPLMN before mobile terminal last time shutdown or off-grid Operator be operator that the smart card is belonged to, the first frequency sweep information includes the operation that the smart card is belonged to The frequency point information that quotient is supported；It is described to carry out frequency sweep according to the first frequency sweep information, and to the frequency point collection that the frequency sweep obtains Conjunction is ranked up according to the signal strength of frequency point, and then is carried out since the frequency point of foremost according to the result after the sequence small The step of area selects, comprising: carry out frequency sweep according to the frequency point information that the operator that the smart card is belonged to is supported, and to institute It states the frequency point sets that frequency sweep obtains to be ranked up according to the signal strength of frequency point, and then according to the result after the sequence before most The frequency point in face starts to carry out cell selection.

In a third possible implementation of the first aspect, RPLMN before mobile terminal last time shutdown or off-grid Operator be operator that the smart card is belonged to, the first frequency sweep information includes the operation that the smart card is belonged to The band information that quotient is supported；It is described to carry out frequency sweep according to the first frequency sweep information, and to the frequency point collection that the frequency sweep obtains Conjunction is ranked up according to the signal strength of frequency point, and then is carried out since the frequency point of foremost according to the result after the sequence small The step of area selects, comprising: carry out frequency sweep according to the band information that the operator that the smart card is belonged to is supported, and to institute It states the frequency point sets that frequency sweep obtains to be ranked up according to the signal strength of frequency point, and then according to the result after the sequence before most The frequency point in face starts to carry out cell selection.

In a fourth possible implementation of the first aspect, RPLMN before mobile terminal last time shutdown or off-grid Country be the smart card belonging country, the first frequency sweep information includes the frequency range that the belonging country of the smart card is supported Information；It is described to carry out frequency sweep according to the first frequency sweep information, and the frequency point sets obtained to the frequency sweep are according to the letter of frequency point Number intensity is ranked up, and then carries out the step of cell selection since the frequency point of foremost according to the result after the sequence, The frequency point sets for including: that the frequency range supported according to the belonging country of the smart card carries out frequency sweep, and the frequency sweep being obtained by It is ranked up according to the signal strength of frequency point, and then carries out cell choosing since the frequency point of foremost according to the result after the sequence It selects.

In the fifth possible implementation of the first aspect, the country for obtaining the mobile terminal and being currently located The step of information, comprising: if there are the states of emergency services in the given time for the mobile terminal, and in the urgent clothes When the state of business, RPLMN before the belonging country of the operator of emergency services cell and mobile terminal last time shutdown or off-grid Country is identical, then the state of the country that the mobile terminal is currently located and RPLMN before mobile terminal last time shutdown or off-grid Family is identical；If there are the states of emergency services in the given time for the mobile terminal, and in the state of the emergency services When, the belonging country of the operator of emergency services cell and the mobile terminal last time shut down or off-grid before RPLMN country's not phase Together, then the country and the national not phase of RPLMN before mobile terminal last time shutdown or off-grid that the mobile terminal is currently located Together.

In the sixth possible implementation of the first aspect, the step of the first frequency sweep information of the acquisition, comprising: from The first linked list in the non-erasable storage region of the mobile terminal obtains the first frequency sweep information, first associated column Table includes the first operator and first operation present in the country of RPLMN before mobile terminal last time shutdown or off-grid The frequency range that the country of RPLMN is supported before frequency point or frequency range or mobile terminal last time shutdown or off-grid that quotient is supported.

The possible implementation of with reference to first aspect the first, in the 7th kind of possible implementation of first aspect In, the step of the second frequency sweep information of the acquisition, comprising: closed from second in the non-erasable storage region of the mobile terminal Join list and obtain the second frequency sweep information, second linked list includes preset second operation of different national, each countries Frequency point or frequency range that quotient and second operator are supported or the frequency range that each country is supported.

Second aspect, the present invention provide a kind of cell selecting apparatus, and described device includes: the first acquisition module, second obtains Modulus block, third obtain module, the first scan module, the first sorting module and first community selecting module；Described first obtains Modulus block is used to obtain the national information of registered public land mobile network RPLMN before the shutdown of mobile terminal last time or off-grid And operator's informaiton；The second acquisition module is for obtaining the national information that the mobile terminal is currently located；The third Module is obtained to be used in the country that the mobile terminal is currently located and RPLMN before mobile terminal last time shutdown or off-grid When country is identical, the first frequency sweep information is obtained, first scan module is used to carry out frequency sweep according to the first frequency sweep information, First sorting module is for being ranked up the frequency point sets that the frequency sweep obtains according to the signal strength of frequency point, and described the One cell selection module is used to carry out cell selection since the frequency point of foremost according to the result after the sequence；Wherein, institute The frequency point information that the operator that the first frequency sweep information includes RPLMN before mobile terminal last time shutdown or off-grid is supported is stated, Or on the band information or the mobile terminal that the operator of RPLMN is supported before the mobile terminal last time shutdown or off-grid The band information that the country of RPLMN is supported before secondary shutdown or off-grid.

In the first possible implementation of the second aspect, described device further include: the 4th acquisition module, second are swept Frequency module, the second sorting module and second community selecting module；The 4th acquisition module in the mobile terminal for working as When the country at preceding place is not identical as the country of RPLMN before mobile terminal last time shutdown or off-grid, the second frequency sweep letter is obtained Breath, second scan module are used to carry out frequency sweep according to the second frequency sweep information, and second sorting module is used for institute It states the frequency point sets that frequency sweep obtains to be ranked up according to the signal strength of the frequency point, the second community selecting module is for pressing Cell selection is carried out since the frequency point of foremost according to the result after the sequence；Wherein, the second frequency sweep information includes institute It states frequency point information that the preset operator, country that mobile terminal is currently located is supported or the mobile terminal is currently located The frequency range letter that the country that the band information or the mobile terminal that preset operator, country is supported are currently located is supported Breath.

In a second possible implementation of the second aspect, RPLMN before mobile terminal last time shutdown or off-grid Operator be operator that the smart card is belonged to, the first frequency sweep information includes the operation that the smart card is belonged to The frequency point information that quotient is supported；First scan module is specifically used for being supported according to the operator that the smart card is belonged to Frequency point information carry out frequency sweep.

In the third possible implementation of the second aspect, RPLMN before mobile terminal last time shutdown or off-grid Operator be operator that the smart card is belonged to, the first frequency sweep information includes the operation that the smart card is belonged to The band information that quotient is supported；First scan module is specifically used for being supported according to the operator that the smart card is belonged to Band information carry out frequency sweep.

In the fourth possible implementation of the second aspect, RPLMN before mobile terminal last time shutdown or off-grid Country be the smart card belonging country, the first frequency sweep information includes the frequency range that the belonging country of the smart card is supported Information；First scan module is specifically used for the frequency range supported according to the belonging country of the smart card and carries out frequency sweep.

In a fifth possible implementation of the second aspect, described second module is obtained specifically in the movement There are the states of emergency services in the given time for terminal, and in the state of the emergency services, emergency services cell The belonging country of operator and the mobile terminal last time shut down or off-grid before the country of RPLMN it is identical when, it is described it is mobile eventually Hold the country being currently located identical as the country of RPLMN before mobile terminal last time shutdown or off-grid；And described There are the states of emergency services in the given time for mobile terminal, and in the state of the emergency services, emergency services are small It is described when the country of RPLMN is not identical before the belonging country of the operator in area and mobile terminal last time shutdown or off-grid The country that mobile terminal is currently located is not identical as the country of RPLMN before mobile terminal last time shutdown or off-grid.

In the sixth possible implementation of the second aspect, the third obtains module and is specifically used for from the movement The first linked list in the non-erasable storage region of terminal obtains the first frequency sweep information, and first linked list includes institute State the first operator and the institute, the first operator present in the country of RPLMN before mobile terminal last time shutdown or off-grid The frequency range that the country of RPLMN is supported before the frequency point or frequency range of support or mobile terminal last time shutdown or off-grid.

In conjunction with the first possible implementation of second aspect, in the 7th kind of possible implementation of second aspect In, the second linked list that the 4th acquisition module is specifically used for from the non-erasable storage region of the mobile terminal obtains The second frequency sweep information is taken, second linked list includes different preset second operator, national, each country and institute State frequency point or frequency range that the second operator is supported or the frequency range that each country is supported.

The beneficial effects of the present invention are: be in contrast to the prior art, the present invention obtain the shutdown of mobile terminal last time or The operator's informaiton of the national information of registered public land mobile network RPLMN and the country before off-grid；Obtain movement The national information that terminal is currently located；If before national and the shutdown of mobile terminal last time or off-grid that mobile terminal is currently located The country of RPLMN is identical, then obtains the first frequency sweep information, carries out frequency sweep according to the first frequency sweep information, and to the frequency that frequency sweep obtains Point set is ranked up according to the signal strength of frequency point, and then is carried out since the frequency point of foremost according to the result after sequence small Area's selection.Since the first frequency sweep information includes the frequency point information that operator is supported or the band information that operator is supported, or The band information that country is supported can reduce the time of web search in this way, and the power for reducing web search disappears Consumption.

Detailed description of the invention

Fig. 1 is the flow chart of one embodiment of cell selecting method of the present invention；

Fig. 2 is the flow chart of another embodiment of cell selecting method of the present invention；

Fig. 3 is the flow chart of the another embodiment of cell selecting method of the present invention；

Fig. 4 is the flow chart of the another embodiment of cell selecting method of the present invention；

Fig. 5 is the flow chart of the another embodiment of cell selecting method of the present invention；

Fig. 6 is the flow chart of the another embodiment of cell selecting method of the present invention；

Fig. 7 is the structural schematic diagram of one embodiment of cell selecting apparatus of the present invention；

Fig. 8 is the structural schematic diagram of another embodiment of cell selecting apparatus of the present invention；

Fig. 9 is the structural schematic diagram of the another embodiment of cell selecting apparatus of the present invention；

Figure 10 is the entity structure schematic diagram of one embodiment of cell selecting apparatus of the present invention.

Specific embodiment

Refering to fig. 1 to Fig. 4, Fig. 1 to Fig. 4 is the flow chart of four embodiments of cell selecting method of the present invention, comprising:

Step S101: registered public land mobile network RPLMN before acquisition mobile terminal last time shutdown or off-grid National information and operator's informaiton.

Step S101 is mainly to pass through mobile terminal to obtain the public land shifting registered before the shutdown of the machine last time or off-grid The national information of dynamic network RPLMN and the operator's informaiton of the country.

If RPLMN is saved on smart cards, can be obtained by smart card, smart card is usually integrated circuit card The one kind of (IC card, Integrated Circuit Card), can be Subscriber Identity Module (SIM, Subscriber Identity Module), common user identification card (USIM, Universal Subscriber Identity Module) or Subscriber Identity Module (UIM, User Identity Module) etc..If RPLMN is stored on the memory of mobile terminal, movement can be passed through The memory of terminal obtains.RPLMN is got, the national information and operator's informaiton of RPLMN can be got.

Public land mobile network PLMN is to provide land mobile by government or operator that it is ratified for the public Business purpose and the network established and managed, PLMN=MCC+MNC, wherein (Mobile Country Code is abbreviated as MCC MCC) it is mobile subscriber belonging country code name, accounts for 3 bit digitals, Chinese MCC is defined as 460；MNC(Mobile Network Code is abbreviated as MNC) it is mobile network's coding, it is made of two or three bit digitals, the mobile network of China Mobile is encoded to 00, such as the PLMN of China Mobile is 46000, the PLMN of China Unicom is 46001.

International mobile subscriber identity (International Mobile Subscriber is also stored on smart card Identification Number, is abbreviated as IMSI), IMSI is the mark for distinguishing mobile subscriber, and total length is no more than 15 Position, uses 0~9 number.Wherein MCC accounts for 3 bit digitals, and MNC is mobile network's coding, is made of two or three bit digitals, MSIN (Mobile Subscriber Identification Number, be abbreviated as MSIN) is mobile identification number, to Identify the mobile subscriber in a certain mobile radio communication.MCC in IMSI is known as the belonging country of smart card, and the MNC in IMSI is known as The operator that smart card is belonged to.Currently, there are three the operators of wireless mobile communications for China, title is respectively: China Mobile Communications Corporation (China Mobile), China Linked Network Communication Group Co., Ltd's (China Unicom) and China Telecommunications group company (China Telecom).

HPLMN (Home PLMN, be abbreviated as HPLMN) is Home PLMN, for the PLMN of mobile terminal user's ownership.Also To say, the MCC and MNC for including in the IMSI number on mobile terminal intelligent card on HPLMN MCC and MNC be consistent, for For a certain user, HPLMN only one.

RPLMN (Registered PLMN, be abbreviated as PPLMN) is registered PLMN, be mobile terminal in last time shutdown or PLMN before last time off-grid in registration.It is typically maintained in smart card or in the memory of mobile terminal.

When HPLMN is identical as RPLMN, smart card is more in the state not roamed, as HPLMN and RPLMN When not identical, smart card is more the state in roaming.

When smart card its belonging country use or smart card roam into other countries, opened for the first time in the roaming place country Machine or when the roaming place country is also unregistered, the country of RPLMN is all the belonging country of smart card, at this point, HPLMN and RPLMN It is identical；When smart card roams into other countries, in the roaming place, country is non-is first powered on or when roaming place country is registered, The country of RPLMN is roaming place country, at this point, HPLMN is not identical as RPLMN.

Step S102: the national information that mobile terminal is currently located is obtained.

It is at which country when the national information that mobile terminal is currently located refers to currently used mobile terminal.For example, China；If gone abroad, in external (such as Britain, the U.S.).Obtaining the national information that mobile terminal is currently located has many modes, Such as: the MCC acquisition of information mobile terminal in PLMN belonging to the emergency services cell being resident by mobile terminal is currently located National information, in the PLMN information for including in the Cell Broadcast Channel for the covering this area that can also be received by mobile phone The national information that national code MCC acquisition of information mobile terminal is currently located.

Step S103: if country and the state of RPLMN before the shutdown of mobile terminal last time or off-grid that mobile terminal is currently located Family is identical, then obtains the first frequency sweep information, the frequency point sets for carrying out frequency sweep according to the first frequency sweep information, and frequency sweep being obtained according to The signal strength of frequency point is ranked up, and then cell selection is carried out since the frequency point of foremost according to the result after sequence, In, the first frequency sweep information includes the frequency point information supported of operator of RPLMN before the shutdown of mobile terminal last time or off-grid, or moves The band information or the shutdown of mobile terminal last time or off-grid that the operator of RPLMN is supported before dynamic terminal last shutdown or off-grid The band information that the country of preceding RPLMN is supported.

If the country that mobile terminal is currently located is identical as the country of RPLMN, there are two types of situations at this time:

The first situation, smart card do not roam, i.e., mobile terminal be currently located country and smart card belonging country's phase Together, at this point, mobile terminal be currently located country it is identical as the country of RPLMN, RPLMN is identical as HPLMN.In such case Under, the country of RPLMN is the belonging country of smart card, mobile terminal last time shutdown or de- before the shutdown of mobile terminal last time or off-grid The operator of RPLMN is the operator that smart card is belonged to before netting, and therefore, the first frequency sweep information can specifically include smart card The band information that the operator that the frequency point information or smart card that the operator belonged to is supported are belonged to is supported, or intelligence The band information that the belonging country of card is supported.

Second situation, smart card roam into other countries, and in the roaming place, country is non-first powers on or in the roaming place Country is registered, i.e., mobile terminal is currently located national not identical as the belonging country of smart card, at this point, the current institute of mobile terminal Country it is identical as the country of RPLMN, but RPLMN is not identical as HPLMN.In this case, mobile terminal last time closes The country of RPLMN is roaming place country before machine or off-grid, and the operator of RPLMN is before the shutdown of mobile terminal last time or off-grid Roaming place country it is registered on operator, therefore, the first frequency sweep information can specifically include roaming place country it is registered on The band information or roaming place that operator on the frequency point information or roaming place country that operator is supported are registered is supported The band information that country is supported.

Referring to fig. 2, if the operator of RPLMN is the operation that smart card is belonged to before the shutdown of mobile terminal last time or off-grid Quotient, the first frequency sweep information of acquisition are the frequency point informations that the operator that smart card is belonged to is supported, are belonged to according to smart card The frequency point supported of operator carry out frequency sweep, the range very little of frequency sweep, can greatly reduce the web search time at this time, this When, step S103 are as follows:

Step S103a: the frequency point information that the operator that smart card is belonged to is supported is obtained, is belonged to according to smart card The frequency point that operator is supported carries out frequency sweep, and is ranked up to the frequency point sets that frequency sweep obtains according to the signal strength of frequency point, And then cell selection is carried out since the frequency point of foremost according to the result after sequence.

Referring to Fig. 3, if the operator of RPLMN is the operation that smart card is belonged to before the shutdown of mobile terminal last time or off-grid Quotient, the first frequency sweep information of acquisition are the band informations that the operator that smart card is belonged to is supported, are belonged to according to smart card The frequency range supported of operator be scanned, the range of frequency sweep is more slightly bigger than previous frequency point ranges at this time, but compares complete The range of frequency range is still much smaller, therefore can also greatly reduce the web search time；At this point, step S103 are as follows:

Step S103b: the band information that the operator that smart card is belonged to is supported is obtained, is belonged to according to smart card The frequency range that operator is supported carries out frequency sweep, and is ranked up to the frequency point sets that frequency sweep obtains according to the signal strength of frequency point, And then cell selection is carried out since the frequency point of foremost according to the result after sequence.

Referring to fig. 4, it if the country of RPLMN is the belonging country of smart card before the shutdown of mobile terminal last time or off-grid, obtains The first frequency sweep information be smart card the band information supported of belonging country, the frequency range supported according to the belonging country of smart card Carry out frequency sweep, although full frequency band frequency sweep, due to the frequency point sets that frequency sweep obtains be according to frequency point signal strength into Row sequence, then carry out cell selection since the frequency point of foremost according to the result after sequence, the frequency point of foremost is also It is the maximum frequency point of signal strength, cell selects since the frequency point of foremost, therefore can also reduce the time of web search. At this point, step S103 are as follows:

Step S103c: the band information that the belonging country of smart card is supported is obtained, is supported according to the belonging country of smart card Frequency range carry out frequency sweep, and the frequency point sets that frequency sweep obtains are ranked up according to the signal strength of frequency point, and then according to sequence Result afterwards carries out cell selection since the frequency point of foremost.

Above-mentioned sweep method since the time of the time of web search can be reduced, also can by the power consumption of web search It is corresponding to reduce.

Embodiment of the present invention obtains registered public land mobile network before the shutdown of mobile terminal last time or off-grid The operator's informaiton of the national information of RPLMN and the country；Obtain the national information that mobile terminal is currently located；If mobile whole It holds the country being currently located identical as the country of RPLMN before the shutdown of mobile terminal last time or off-grid, then obtains the first frequency sweep information, Frequency sweep is carried out according to the first frequency sweep information, and the frequency point sets that frequency sweep obtains are ranked up according to the signal strength of frequency point, into And cell selection is carried out since the frequency point of foremost according to the result after sequence.Since the first frequency sweep information includes institute, operator The band information that the frequency point information of support or operator are supported, or the band information that country is supported, in this way, The time that web search can be reduced reduces the power consumption of web search.

Refering to Fig. 5 and Fig. 6, Fig. 5 and Fig. 6 are the flow chart of cell selecting method another two embodiment of the present invention, this reality The embodiment for applying mode and Fig. 1 to Fig. 4 is essentially identical, and something in common is referring to Figure 1 to Fig. 4 and corresponding explanatory note. This method comprises:

Step S201: registered public land mobile network RPLMN before acquisition mobile terminal last time shutdown or off-grid The operator's informaiton of national information and the country.

Step S202: the national information that mobile terminal is currently located is obtained.

Wherein, step S202 is specifically included:

Step S202a: judge mobile terminal in the given time and whether there is the state for there are emergency services.

Predetermined time refers to that the country that mobile terminal is currently located will not be another country, example from country's variation Such as, the user of mobile terminal will go to Britain, and China to Britain needs 3 hours by air, and mobile terminal has before 3 hours Emergency services state, the user of mobile terminal will not reach Britain within 1 hour, and therefore, it is 1 that the predetermined time, which can be set, Perhaps shorter time or longer time hour.The setting of predetermined time is determined according to practical situations.

Step S202b: if mobile terminal judges in the given time there are the state of emergency services in emergency services When state, whether the country of RPLMN before the belonging country of the operator of emergency services cell and the shutdown of mobile terminal last time or off-grid It is identical.If identical, S202c is entered step, if it is not the same, entering step S202d.

Step S202c: if identical, before national and the shutdown of mobile terminal last time or off-grid that mobile terminal is currently located The country of RPLMN is identical.S203 is entered step, as shown in Figure 5.

If the belonging country of the operator of emergency services cell and mobile terminal last time shut down in the state of emergency services Or before off-grid RPLMN country it is identical, show that country that mobile terminal is currently located is the shutdown of mobile terminal last time or off-grid The country of preceding RPLMN, including two kinds of situations: the first situation, smart card do not roam, i.e. the country that is currently located of mobile terminal It is identical as the belonging country of smart card；Second situation, smart card roam into other countries, and in the roaming place, country is non-first powers on Or it is registered in the roaming place country.

Step S202d: if it is not the same, the country that then mobile terminal is currently located and the shutdown of mobile terminal last time or off-grid The country of preceding RPLMN is not identical.S205 is entered step, as shown in Figure 6.

If the belonging country of the belonging country of the operator of emergency services cell and smart card is not in the state of emergency services It is identical, show that country that mobile terminal is currently located is not the belonging country of smart card, such case is corresponding to be: smart card roaming To other countries, in the roaming place, country first powers on or when the roaming place country is also unregistered, at this point, due to being to open for the first time Machine is also unregistered in the roaming place country, and the RPLMN on smart card or mobile terminal memory is still in the belonging country of smart card RPLMN.

Step S203: the first frequency sweep letter is obtained from the first linked list in the non-erasable storage region of mobile terminal Breath, the first linked list include the first operator and the present in the country of RPLMN before the shutdown of mobile terminal last time or off-grid The frequency range that the country of RPLMN is supported before frequency point or frequency range or the shutdown of mobile terminal last time or off-grid that one operator is supported.

First linked list include mobile terminal last time shutdown or off-grid before RPLMN country present in the first operator First fortune present in the country of RPLMN before the frequency point supported with the first operator or the shutdown of mobile terminal last time or off-grid The frequency that the country of RPLMN is supported before frequency range or the shutdown of mobile terminal last time or off-grid that battalion quotient and the first operator are supported Section.

Such as, the country of RPLMN is smart card belonging country before the shutdown of mobile terminal last time or off-grid, and is China's Mainland, the First linked list of the frequency point that one operator and the first operator GSM are supported can be as shown in table 1, the first operator and First linked list of the frequency range that one operator GSM is supported can be as shown in table 2, and the first of the frequency range that China's Mainland is supported Linked list can be as shown in table 3.

Table 1

Table 2

Table 3

If server, which has, updates the first contingency table, it can be downloaded from server and obtain updated first association Then table is stored in non-erasable storage region.

Step S204: the frequency point sets for carrying out frequency sweep according to the first frequency sweep information, and frequency sweep being obtained according to frequency point letter Number intensity is ranked up, and then cell selection is carried out since the frequency point of foremost according to the result after sequence；Wherein, it first sweeps Frequency information includes before the shutdown of mobile terminal last time or off-grid on the frequency point information supported of operator of RPLMN or mobile terminal RPLMN before the operator of RPLMN is supported before secondary shutdown or off-grid band information or the shutdown of mobile terminal last time or off-grid The band information that country is supported.

First frequency sweep information include mobile terminal last time shutdown or off-grid before RPLMN operator supported frequency point letter The band information or the shutdown of mobile terminal last time that the operator of RPLMN is supported before breath or the shutdown of mobile terminal last time or off-grid Or the band information that the country of RPLMN is supported before off-grid；If the operator of RPLMN before the shutdown of mobile terminal last time or off-grid It is the operator that smart card is belonged to, the country of RPLMN is smart card belonging country before the shutdown of mobile terminal last time or off-grid, that : if in the first contingency table including the frequency that the first operator and the first operator present in smart card belonging country are supported Point, then the operator belonged to according to smart card can find the frequency point that the operator is supported in the first contingency table, Frequency sweep is carried out according to the frequency point that the operator is supported；If if including that smart card belonging country is deposited in the first contingency table The frequency range supported of the first operator and the first operator, then the operator belonged to according to smart card can be first The frequency range that the operator is supported is found in contingency table, carries out frequency sweep according to the frequency range that the operator is supported；If The frequency range that belonging country in first contingency table including smart card is supported, then can be closed first according to the belonging country of smart card The frequency range that the country is supported is found in connection table, carries out frequency sweep according to the frequency range that the country is supported.

If the operator of RPLMN is roaming place registered operator, country before the shutdown of mobile terminal last time or off-grid, The country of RPLMN is roaming place country before the shutdown of mobile terminal last time or off-grid, and is carried out according to above-mentioned method.Step S205: the second frequency sweep information, the second associated column are obtained from the second linked list in the non-erasable storage region of mobile terminal Table includes the frequency point or frequency range that different preset second operator, national, each country and the second operator are supported, or The frequency range that each country is supported.

If the belonging country of the operator of emergency services cell and mobile terminal last time shut down in the state of emergency services Or RPLMN is not identical before off-grid, shows that country that mobile terminal is currently located is not the belonging country of smart card, such case is corresponding : smart card roams into other countries, and in the roaming place, country first powers on or when the roaming place country is also unregistered, this When, due to be first power on or in the roaming place country it is also unregistered, the RPLMN on smart card or mobile terminal memory still exists The RPLMN of the belonging country of smart card.

Second linked list includes that different preset second operator, national, each country and the second operator are propped up The frequency point held, as shown in table 4；Or different preset second operators, national, each country and the second operator is supported Frequency range, as shown in table 5；Or the frequency range that different national, each countries is supported, as shown in table 6.

Table 4

Table 5

Table 6

National title	The frequency range that country is supported
		Britain	GSM900, GSM1800
The U.S.	GSM850, GSM1900
		Canada	GSM850, GSM1900
...	...

The country that mobile terminal is currently located is other countries, when not being the belonging country of smart card, can preset and mention For the second operator of service, the second operator can be the operator belonged to smart card and sign the second operation for having agreement Quotient or good second operator of network state.The setting of second operator determines according to actual conditions, herein with no restrictions.

If server, which has, updates the second contingency table, is downloaded from server and obtain updated second contingency table, so After be stored in non-erasable storage region.

Step S206: frequency sweep is carried out according to the second frequency sweep information, and the frequency point sets that frequency sweep is obtained are according to the letter of frequency point Number intensity is ranked up, and then cell selection is carried out since the frequency point of foremost according to the result after sequence；Wherein, it second sweeps Frequency information includes the frequency point information or the current institute of mobile terminal that the preset operator, country that is currently located of mobile terminal is supported The frequency range letter supported of the country that is currently located of the band information supported of preset operator, country or mobile terminal Breath.

Since the second frequency sweep information includes the frequency point letter that the preset operator, country that is currently located of mobile terminal is supported What the band information or mobile terminal that the preset operator, country that breath or mobile terminal are currently located is supported were currently located The band information that country is supported；If in the second contingency table including different preset second operators, national, each country And second frequency point supported of operator, then the preset operator, country being currently located according to mobile terminal can be the The frequency point that the operator is supported is found in two contingency tables, carries out frequency sweep according to the frequency point that the operator is supported；Such as It include the frequency that different preset second operators, national, each country and the second operator are supported in the second contingency table of fruit Section, then the preset operator, country being currently located according to mobile terminal can find the operator in the second contingency table The frequency range supported carries out frequency sweep according to the frequency range that the operator is supported；If including mobile whole in the second contingency table The frequency range for holding the country being currently located to be supported, then the country being currently located according to mobile terminal can be in the second contingency table The frequency range that the country is supported is found, carries out frequency sweep according to the frequency range that the country is supported.

It is the structural schematic diagram of one embodiment of cell selecting apparatus of the present invention refering to Fig. 7, Fig. 7, which can execute Step of the above-mentioned Fig. 1 into Fig. 6.The device includes: that the first acquisition module 101, second obtains module 102, third obtains module 103, the first scan module 104, the first sorting module 105 and first community selecting module 106.

First obtains module 101 moves for registered public land before obtaining the shutdown of mobile terminal last time or off-grid The national information and operator's informaiton of dynamic network RPLMN.

If RPLMN is saved on smart cards, can be obtained by smart card, smart card is usually integrated circuit card One kind can be SIM, USIM or UIM etc..If RPLMN is stored on the memory of mobile terminal, movement can be passed through The memory of terminal obtains.RPLMN is got, the national information and operator's informaiton of RPLMN can be got.

Second acquisition module 102 is for obtaining the national information that mobile terminal is currently located.

It is at which country when the national information that mobile terminal is currently located refers to currently used mobile terminal.For example, China；If gone abroad, in external (such as Britain, the U.S.).Obtaining the national information that mobile terminal is currently located has many modes, Such as: the state that the MCC acquisition of information mobile terminal in PLMN belonging to the emergency services cell being resident by mobile phone is currently located Family's information, the country in PLMN information for including in the Cell Broadcast Channel for the covering this area that can also be received by mobile phone The national information that code MCC acquisition of information mobile terminal is currently located.

Third obtains module 103 and is used for before the country and the shutdown of mobile terminal last time or off-grid that mobile terminal is currently located When the country of RPLMN is identical, the first frequency sweep information is obtained.

First scan module 104 is used to carry out frequency sweep according to the first frequency sweep information.

First sorting module 105 is for being ranked up the frequency point sets that frequency sweep obtains according to the signal strength of frequency point.

First community selecting module 106 is used to carry out cell choosing since the frequency point of foremost according to the result after sequence It selects；Wherein, the first frequency sweep information include mobile terminal last time shutdown or off-grid before RPLMN operator supported frequency point letter The band information or the shutdown of mobile terminal last time that the operator of RPLMN is supported before breath or the shutdown of mobile terminal last time or off-grid Or the band information that the country of RPLMN is supported before off-grid.

If what is obtained is the frequency point information that operator that smart card is belonged to is supported, the first scan module 104 is pressed The frequency point supported according to the operator that smart card is belonged to carries out frequency sweep, and the range very little of frequency sweep, can greatly reduce net at this time Network search time.If what is obtained is the band information that operator that smart card is belonged to is supported, the first scan module 104 It is scanned according to the frequency range that the operator that smart card is belonged to is supported, the range of frequency sweep is slightly than previous frequency point ranges at this time Greatly a bit, but it is still more much smaller than the range of full frequency band, therefore can also greatly reduce the web search time.If obtained Be smart card the band information supported of belonging country, then the first scan module 104 is supported according to the belonging country of smart card Frequency range carry out frequency sweep, although full frequency band frequency sweep, due to being the signal according to frequency point to the frequency point sets that frequency sweep obtains What intensity was ranked up, cell selection, the frequency of foremost are then carried out since the frequency point of foremost according to the result after sequence Point i.e. the maximum frequency point of signal strength, cell selects since the frequency point of foremost, therefore can also reduce web search Time.

Refering to Fig. 8 to Fig. 9, Fig. 8 to Fig. 9 is the structural schematic diagram of cell selecting apparatus another two embodiment of the present invention, The device can execute step of the above-mentioned Fig. 5 into Fig. 6.The device includes: that the first acquisition module 201, second obtains module 202, third obtains module 203, the first scan module 204, the first sorting module 205 and first community selecting module 206.

First acquisition module 201 is used to obtain registered public land mobile network before the shutdown of mobile terminal last time or off-grid The operator's informaiton of the national information of network RPLMN and the country.

Second acquisition module 202 is for obtaining the national information that mobile terminal is currently located.

Wherein, the second acquisition module 202 includes: the first judging unit 2021, second judgment unit 2022 and confirmation form Member 2023.

First judging unit 2021 whether there is the state for having emergency services for judging mobile terminal in the given time.

Second judgment unit 2022 is used to judge in mobile terminal in the given time there are when the state of emergency services In the state of emergency services, before the belonging country of the operator of emergency services cell and the shutdown of mobile terminal last time or off-grid Whether the country of RPLMN is identical.

Confirmation unit 2023 is used for the belonging country of the operator of emergency services cell and movement in the state of emergency services When the country of RPLMN is identical before terminal last shutdown or off-grid, in the country and mobile terminal that confirmation mobile terminal is currently located The country of RPLMN is identical before secondary shutdown or off-grid；And in the state of emergency services, the operator of emergency services cell When the country of RPLMN is not identical before belonging country and the shutdown of mobile terminal last time or off-grid, the state that mobile terminal is currently located is confirmed Family is not identical as the country of RPLMN before the shutdown of mobile terminal last time or off-grid.

Third obtains module 203 and is used for before the country and the shutdown of mobile terminal last time or off-grid that mobile terminal is currently located When the country of RPLMN is identical, the first frequency sweep information is obtained.

Third obtains the first linked list that module 203 is specifically used for from the non-erasable storage region of mobile terminal and obtains Take the first frequency sweep information, the first linked list includes before the shutdown of mobile terminal last time or off-grid the present in the country of RPLMN The country of RPLMN before frequency point or frequency range or the shutdown of mobile terminal last time or off-grid that one operator and the first operator are supported The frequency range supported.

If server, which has, updates the first contingency table, is downloaded from server and obtain updated first contingency table, so After be stored in non-erasable storage region.

First scan module 204 is used to carry out frequency sweep according to the first frequency sweep information.

First sorting module 205 is for being ranked up the frequency point sets that frequency sweep obtains according to the signal strength of frequency point.

First community selecting module 206 is used to carry out cell choosing since the frequency point of foremost according to the result after sequence It selects；Wherein, the first frequency sweep information include mobile terminal last time shutdown or off-grid before RPLMN operator supported frequency point letter The band information or the shutdown of mobile terminal last time that the operator of RPLMN is supported before breath or the shutdown of mobile terminal last time or off-grid Or the band information that the country of RPLMN is supported before off-grid.

If the operator of RPLMN is roaming place registered operator, country before the shutdown of mobile terminal last time or off-grid, The country of RPLMN is roaming place country before the shutdown of mobile terminal last time or off-grid, and is carried out according to above-mentioned method.

Referring to Fig. 9, the device further include: the 4th obtains module 207, the second scan module 208, the second sorting module 209 And second community selecting module 210.

4th acquisition module 207 is used for before the country and the shutdown of mobile terminal last time or off-grid that mobile terminal is currently located When the country of RPLMN is not identical, the second frequency sweep information is obtained.4th obtain module 207 be specifically used for from mobile terminal can not It wipes the second linked list in storage region and obtains the second frequency sweep information, the second linked list includes different national, each Frequency point or frequency range that preset second operator, country and the second operator are supported or the frequency range that each country is supported.

Second linked list includes that different preset second operator, national, each country and the second operator are propped up The frequency range that the frequency point or different preset second operators, national, each country and the second operator held are supported, or not The frequency range that same national, each country is supported.

Second scan module 208 is used to carry out frequency sweep according to the second frequency sweep information.

The frequency point sets that frequency sweep obtains for being ranked up by the second sorting module 209 according to the signal strength of frequency point.

Second community selecting module 210 is used to carry out cell choosing since the frequency point of foremost according to the result after sequence It selects；Wherein, the second frequency sweep information includes the frequency point information that the preset operator, country that is currently located of mobile terminal is supported, or The national institute that the band information or mobile terminal that the preset operator, country that mobile terminal is currently located is supported are currently located The band information of support.

0, Figure 10 is the entity structure schematic diagram of one embodiment of device of present invention selection cell, this implementation refering to fig. 1 The device of mode is the entity apparatus of above-mentioned apparatus.The device include: processor 11, the memory coupled with processor 11 12, Frescan 13, receiver 14 and the data line 15 for connecting processor 11, memory 12, frescan 13, receiver 14.

Memory 12 is for storing the first frequency sweep information.

Processor 11 is used to obtain registered public land mobile network RPLMN before the shutdown of mobile terminal last time or off-grid National information and operator's informaiton；Obtain the national information that mobile terminal is currently located；If the state that mobile terminal is currently located Family is identical as the country of RPLMN before the shutdown of mobile terminal last time or off-grid, then transfers memory 12 and obtain the first frequency sweep information, The frequency point sets for carrying out frequency sweep, and frequency sweep being obtained according to the first frequency sweep information control frescan 13 according to frequency point signal strength It is ranked up, and then controls and receives device 14 and carry out cell selection since the frequency point of foremost according to the result after sequence；Wherein, First frequency sweep information includes the frequency point information supported of operator of RPLMN before the shutdown of mobile terminal last time or off-grid, or mobile Before the operator of RPLMN is supported before terminal last shutdown or off-grid band information or the shutdown of mobile terminal last time or off-grid The band information that the country of RPLMN is supported.

Wherein, memory 12 is also used to store the second frequency sweep information.

Processor 11 is also used to before the country and the shutdown of mobile terminal last time or off-grid that the mobile terminal is currently located When the country of RPLMN is not identical, transfers memory 12 and obtain the second frequency sweep information, control frescan 13 is swept according to described second Frequency information carries out frequency sweep, and the frequency point sets that the frequency sweep obtains are ranked up according to the signal strength of the frequency point, in turn It controls and receives device 14 and carries out cell selection since the frequency point of foremost according to the result after the sequence；Wherein, described second Frequency sweep information includes the frequency point information or the movement that the preset operator, country that is currently located of the mobile terminal is supported The national institute that the band information or the mobile terminal that the preset operator, country that terminal is currently located is supported are currently located The band information of support.

Wherein, the operator of RPLMN is fortune that the smart card is belonged to before mobile terminal last time shutdown or off-grid Quotient is sought, the first frequency sweep information includes the frequency point information that the operator that is belonged to of the smart card is supported；Processor 11 is used Frequency sweep is carried out according to the frequency point information that the operator that the smart card is belonged to is supported in control frescan 13.

Wherein, the operator of RPLMN is fortune that the smart card is belonged to before mobile terminal last time shutdown or off-grid Quotient is sought, the first frequency sweep information includes the band information that the operator that is belonged to of the smart card is supported；Processor 11 is used Frequency sweep is carried out according to the band information that the operator that the smart card is belonged to is supported in control frescan 13.

Wherein, before mobile terminal last time shutdown or off-grid the country of RPLMN be the smart card belonging country, it is described First frequency sweep information includes the band information that the belonging country of the smart card is supported；Processor 11 is pressed for controlling frescan 13 The frequency range supported according to the belonging country of the smart card carries out frequency sweep.

Wherein, processor 11 is also used to that there are the states of emergency services in the given time in the mobile terminal, and In the state of the emergency services, the belonging country of the operator of emergency services cell and the mobile terminal last time shut down or take off When the country of RPLMN is identical before netting, determine country that the mobile terminal is currently located and mobile terminal last time shutdown or The country of RPLMN is identical before off-grid；In the mobile terminal, there are the states of emergency services in the given time, and described When the state of emergency services, before the belonging country of the operator of emergency services cell and mobile terminal last time shutdown or off-grid When the country of RPLMN is not identical, determine that the country that the mobile terminal is currently located shut down or took off with the mobile terminal last time The country of RPLMN is not identical before netting.

Wherein, memory 12 is also used to store the first linked list, and what the first linked list was stored in memory 12 can not It wipes in storage region.

Wherein, processor 11 is also used to the first linked list from the non-erasable storage region of memory 12 and obtains the One frequency sweep information, first linked list include before mobile terminal last time shutdown or off-grid present in the country of RPLMN The first operator and the frequency point supported of first operator or frequency range or mobile terminal last time shutdown or off-grid before The frequency range that the country of RPLMN is supported.

Wherein, memory 12 is also used to store the second linked list, and what the second linked list was stored in memory 12 can not It wipes in storage region.

Wherein, processor 11 is also used to the second linked list from the non-erasable storage region of memory 12 and obtains the Two frequency sweep information, second linked list include different preset second operators, national, each country and described The frequency range that the frequency point or frequency range or each country that two operators are supported are supported.

In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can To realize by another way.For example, device embodiments described above are only schematical, for example, the mould The division of block or unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple Unit or assembly can be combined or can be integrated into another system, or some features can be ignored or not executed.It is another Point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, device or The indirect coupling or communication connection of unit can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.Some or all of unit therein can be selected to realize present embodiment scheme according to the actual needs Purpose.

In addition, each functional unit in each embodiment of the present invention can integrate in one processing unit, it can also To be that each unit physically exists alone, can also be integrated in one unit with two or more units.It is above-mentioned integrated Unit both can take the form of hardware realization, can also realize in the form of software functional units.

If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer It is each that equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute the present invention The all or part of the steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk Etc. the various media that can store program code.

Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other Technical field is included within the scope of the present invention.

Claims

1. a kind of cell selecting method, which is characterized in that the described method includes:

The national information of registered public land mobile network RPLMN and operation before acquisition mobile terminal last time shutdown or off-grid Quotient's information；

Obtain the national information that the mobile terminal is currently located；

If the national phase of the country that the mobile terminal is currently located and RPLMN before mobile terminal last time shutdown or off-grid Together, then the first frequency sweep information is obtained, carries out frequency sweep according to the first frequency sweep information, and to the frequency point sets that the frequency sweep obtains It is ranked up according to the signal strength of frequency point, and then carries out cell since the frequency point of foremost according to the result after the sequence Selection；

Wherein, the first frequency sweep information includes that the operator of RPLMN before mobile terminal last time shutdown or off-grid is supported Frequency point information or mobile terminal last time shutdown or off-grid before RPLMN the band information or described supported of operator The band information that the country of RPLMN is supported before the shutdown of mobile terminal last time or off-grid.

2. the method according to claim 1, wherein the state's letter from home for obtaining the mobile terminal and being currently located After the step of breath, further includes:

If the national not phase of the country that the mobile terminal is currently located and RPLMN before mobile terminal last time shutdown or off-grid Together, then the second frequency sweep information is obtained, carries out frequency sweep, and the frequency point sets that the frequency sweep is obtained according to the second frequency sweep information It is ranked up according to the signal strength of the frequency point, and then is carried out since the frequency point of foremost according to the result after the sequence Cell selection；

Wherein, the second frequency sweep information includes the frequency that the preset operator, country that is currently located of the mobile terminal is supported The band information or described mobile whole that the preset operator, country that point information or the mobile terminal are currently located is supported The band information for holding the country being currently located to be supported.

3. the method according to claim 1, wherein RPLMN before mobile terminal last time shutdown or off-grid Operator is the operator that smart card is belonged to, and the first frequency sweep information includes that the operator that is belonged to of the smart card is propped up The frequency point information held；

It is described to carry out frequency sweep according to the first frequency sweep information, and the frequency point sets obtained to the frequency sweep are according to the signal of frequency point Intensity is ranked up, and then carries out the step of cell selection since the frequency point of foremost according to the result after the sequence, packet It includes:

Frequency sweep is carried out according to the frequency point information that the operator that the smart card is belonged to is supported, and to the frequency that the frequency sweep obtains Point set is ranked up according to the signal strength of frequency point, so according to the result after the sequence since the frequency point of foremost into The selection of row cell.

4. the method according to claim 1, wherein RPLMN before mobile terminal last time shutdown or off-grid Operator is the operator that smart card is belonged to, and the first frequency sweep information includes that the operator that is belonged to of the smart card is propped up The band information held；

Frequency sweep is carried out according to the band information that the operator that the smart card is belonged to is supported, and to the frequency that the frequency sweep obtains Point set is ranked up according to the signal strength of frequency point, so according to the result after the sequence since the frequency point of foremost into The selection of row cell.

5. the method according to claim 1, wherein RPLMN before mobile terminal last time shutdown or off-grid Country is the belonging country of smart card, and the first frequency sweep information includes the band information that the belonging country of the smart card is supported；

The frequency range supported according to the belonging country of the smart card carries out frequency sweep, and the frequency point sets that the frequency sweep is obtained according to The signal strength of frequency point is ranked up, and then cell choosing is carried out since the frequency point of foremost according to the result after the sequence It selects.

6. the method according to claim 1, wherein the state's letter from home for obtaining the mobile terminal and being currently located The step of breath, comprising:

If there are the states of emergency services in the given time for the mobile terminal, and in the state of the emergency services, The belonging country of the operator of emergency services cell and the mobile terminal last time shut down or off-grid before the country of RPLMN it is identical, then The country that the mobile terminal is currently located is identical as the country of RPLMN before mobile terminal last time shutdown or off-grid；

If there are the states of emergency services in the given time for the mobile terminal, and in the state of the emergency services, The belonging country of the operator of emergency services cell and the mobile terminal last time shut down or off-grid before RPLMN country it is not identical, The country that then mobile terminal is currently located is not identical as the country of RPLMN before mobile terminal last time shutdown or off-grid.

7. the method according to claim 1, wherein the step of the first frequency sweep information of the acquisition, comprising:

From in the non-erasable storage region of the mobile terminal the first linked list obtain the first frequency sweep information, described first Linked list includes the first operator present in the country of RPLMN and described the before mobile terminal last time shutdown or off-grid The country of RPLMN is supported before frequency point or frequency range or mobile terminal last time shutdown or off-grid that one operator is supported Frequency range.

8. according to the method described in claim 2, it is characterized in that, the step of the second frequency sweep information of the acquisition, comprising:

From in the non-erasable storage region of the mobile terminal the second linked list obtain the second frequency sweep information, described second Linked list includes the frequency point that different preset second operators, national, each country and second operator are supported Or the frequency range that frequency range or each country are supported.

9. a kind of cell selecting apparatus, which is characterized in that described device includes: the first acquisition module, the second acquisition module, third Obtain module, the first scan module, the first sorting module and first community selecting module；

The first acquisition module is used to obtain registered public land mobile network before the shutdown of mobile terminal last time or off-grid The national information and operator's informaiton of RPLMN；

The second acquisition module is for obtaining the national information that the mobile terminal is currently located；

The third obtain country that module is used to be currently located in the mobile terminal and mobile terminal last time shutdown or When the country of RPLMN is identical before off-grid, the first frequency sweep information is obtained,

First scan module is used to carry out frequency sweep according to the first frequency sweep information,

First sorting module is used to be ranked up the frequency point sets that the frequency sweep obtains according to the signal strength of frequency point,

The first community selecting module is used to carry out cell choosing since the frequency point of foremost according to the result after the sequence It selects；

10. device according to claim 9, which is characterized in that described device further include: the 4th acquisition module, second are swept Frequency module, the second sorting module and second community selecting module；

It is described 4th acquisition module be used for the mobile terminal be currently located country with the mobile terminal last time shutdown or When the country of RPLMN is not identical before off-grid, the second frequency sweep information is obtained,

Second scan module is used to carry out frequency sweep according to the second frequency sweep information,

Second sorting module is for arranging the frequency point sets that the frequency sweep obtains according to the signal strength of the frequency point Sequence,

The second community selecting module is used to carry out cell choosing since the frequency point of foremost according to the result after the sequence It selects；

11. device according to claim 9, which is characterized in that RPLMN before the mobile terminal last time shutdown or off-grid Operator is the operator that smart card is belonged to, and the first frequency sweep information includes that the operator that is belonged to of the smart card is propped up The frequency point information held；

First scan module, which is specifically used for the frequency point information supported according to the operator that the smart card is belonged to, to carry out Frequency sweep.

12. device according to claim 9, which is characterized in that RPLMN before the mobile terminal last time shutdown or off-grid Operator is the operator that smart card is belonged to, and the first frequency sweep information includes that the operator that is belonged to of the smart card is propped up The band information held；

First scan module, which is specifically used for the band information supported according to the operator that the smart card is belonged to, to carry out Frequency sweep.

13. device according to claim 9, which is characterized in that RPLMN before the mobile terminal last time shutdown or off-grid Country is the belonging country of smart card, and the first frequency sweep information includes the band information that the belonging country of the smart card is supported；

First scan module is specifically used for the frequency range supported according to the belonging country of the smart card and carries out frequency sweep.

14. device according to claim 9, which is characterized in that

Described second obtains module specifically for there are the states of emergency services in the given time in the mobile terminal, and In the state of the emergency services, the belonging country of the operator of emergency services cell and the mobile terminal last time shut down or take off When the country of RPLMN is identical before netting, country and mobile terminal last time shutdown or off-grid that the mobile terminal is currently located The country of preceding RPLMN is identical；

And in the mobile terminal, there are the states of emergency services in the given time, and in the shape of the emergency services When state, the belonging country of the operator of emergency services cell and the mobile terminal last time shut down or off-grid before RPLMN country not When identical, the mobile terminal be currently located country with the mobile terminal last time shutdown or off-grid before RPLMN country not It is identical.

15. device according to claim 9, which is characterized in that the third obtains module and is specifically used for from the movement The first linked list in the non-erasable storage region of terminal obtains the first frequency sweep information, and first linked list includes institute The first operator and first operator present in the country of RPLMN before the shutdown of mobile terminal last time or off-grid is stated to be supported Frequency point or frequency range or mobile terminal last time shutdown or off-grid before RPLMN the frequency range supported of country.

16. device according to claim 10, which is characterized in that the described 4th, which obtains module, is specifically used for from the movement The second linked list in the non-erasable storage region of terminal obtains the second frequency sweep information, and second linked list includes not The frequency point or frequency range that same preset second operator, national, each country and second operator is supported, or it is each The frequency range that country is supported.