CN100396150C - Re-option of public land mobile network - Google Patents
Re-option of public land mobile network Download PDFInfo
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- CN100396150C CN100396150C CNB2004100917375A CN200410091737A CN100396150C CN 100396150 C CN100396150 C CN 100396150C CN B2004100917375 A CNB2004100917375 A CN B2004100917375A CN 200410091737 A CN200410091737 A CN 200410091737A CN 100396150 C CN100396150 C CN 100396150C
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Abstract
The present invention discloses a reselecting method for public land mobile networks (PLMN). In the present invention, firstly an HPLMN parameter of a terminal is recorded in a USIM; then, a timer is arranged in a universal subscriber identification module (USIM); subsequently, whether the current public land mobile networks (PLMN) are same is judged according to the mutual information a terminal device and the universal subscriber identification module when the timer reaches a predetermined cycle; if the current public land mobile networks (PLMN) are different, mutual information is returned to the HPLMN parameter of the public land mobile network of the terminal according to the HPLMN parameter of the public land mobile network. In the present invention, the timer is arranged in an STK module with a secondary development function so a short search cycle is reset according to time dimension which can be accepted by the terminal; then, the cycle is returns to the HPLMN, of the terminal according to the stored associated information of the HPLMN in the USIM; therefore, the rapid reselecting function of the PLMN is realized.
Description
Technical field
The present invention relates to mobile communications network, be specifically related to the network reselection technology when a plurality of public land mobile networks are overlapping to be covered, relate in particular to the method that terminal is returned the Home Public Land Mobile Network network.
Background technology
In present mobile communications network, the mobile network of mobile operator is called PLMN (PublicLand Mobile Network, public land mobile network), its unique identification PLMNID is by MCC (Mobile Country Code, mobile national is encoded) and MNC (Mobile Network Code, mobile network's coding) composition.MCC generally comprises three numerals, is used for the country code at unique sign portable terminal place, for example, and with 460 sign China; MNC generally identifies the mobile network that portable terminal is selected for use with two to three numerals, the MNC difference that different mobile operator selects for use.Mobile network's MCC, MNC and IMSI (International Mobile Subscriber Identity, IMSI International Mobile Subscriber Identity) network that the MCC in, MNC are identical is called this user's home network, usually with HPLMN (HomePLMN, Home PLMN) expression, when the user is in the HPLMN network, illustrates the different operators inter-network roaming does not take place user at this moment; The network that mobile network's MCC, MNC are different with MCC, MNC among the IMSI is called VPLMN (Visited PLMN, visit public land mobile network), when the user is in the VPLMN network, illustrates that the user is in different operators inter-network roaming state.
At present, because the coverage rate difference of different PLMN networks, so portable terminal can roam or switch to other network at any time in communication process.In order to guarantee that portable terminal preferentially uses present networks, in a single day the terminal that requires to roam into other networks returns the zone that present networks covers, and portable terminal should return its HPLMN network as early as possible.
The HPLMN periodicity search principle that is based on the 3GPP normalized definition that prior art adopts is realized the gravity treatment to HPLMN.Portable terminal and USIM (Universal Subscriber Identity Module, general subscriber identification module) it is mutual to carry out primary information between every about 30ms, information such as the MNC of portable terminal and MCC have been comprised in this message, USIM sets certain search cycle, regularly detect the PLMN overlay area of communicating by letter and whether arriving other with MCC information by MNC, promptly judge current MNC and MCC information whether with the IMSI that is stored in USIM in MNC and MCC information whether consistent.When judging that current terminal roaming takes place and is in idle condition, terminal starts search HPLMN according to this cycle, so that in time return HPLMN.
But, because general 6 minutes to 8 hours of the PLMN gravity treatment search cycle of setting in present this agreement, the shortest time that the user of promptly switching or roaming into the GSM network returns 3G network is 6 minutes, that is to say, in switching time, can only use the simple voice service of GSM, therefore will cause some characteristic service of 3G to be affected, for example, can't use based on the video telephone of 3G network based on bandwidth; Can only use the practical business speed of GPRS attached to the block domain data service on the GPRS network, rather than the high-speed data service of WCDMA Packet data service etc.
Therefore, for the reselecting method of HPLMN,, will the business of 3G be affected in the prior art because the gravity treatment time is longer.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of reselecting method of public land mobile network is provided, can realizes the quick gravity treatment of public land mobile network.
For solving the problems of the technologies described above, the invention provides the reselecting method of a kind of public land mobile network PLMN, it is characterized in that, comprise step:
1) the Home Public Land Mobile Network network HPLMN parameter of record terminal in USIM USIM;
2) in USIM USIM, timer is set;
3) when arriving the timer predetermined period, judge according to terminal equipment and the interactive information between the USIM USIM whether current public land mobile network PLMN is identical;
4) if inequality, then reselect network and the gravity treatment mark is set, turn back to the Home Public Land Mobile Network network HPLMN of terminal according to described Home Public Land Mobile Network network HPLMN parameter;
5) carry out before the gravity treatment once more whether having gravity treatment record in the scheduled time, if then prolong described timer predetermined period, and after each gravity treatment, upgrade described gravity treatment mark according to described gravity treatment marker for judgment.
Wherein, the described handoff procedure of step 4) is specially:
41) described parameter is write the file of the highest public land mobile network PLMN of priority;
42) initiate hot reset information to terminal;
43) from described file, obtain described parameter, turn back to the Home Public Land Mobile Network network HPLMN of terminal according to the terminal current state.
Wherein, the described permanent recording that is recorded as of step 1).
Wherein, described parameter comprises Home Public Land Mobile Network network frequency point information.
Wherein, described interactive information comprises mobile national coding MCC, mobile network encode MNC and location area code LAC.
Wherein, described method also comprises: after terminal was returned Home Public Land Mobile Network network HPLMN, USIM USIM cancelled timer, and removed the gravity treatment mark on the USIM USIM.
Wherein, step 41) the highest public land mobile network PLMN of described priority is the public land mobile network RPLMN of registration last time.
Wherein, step 43) the described process of returning according to the terminal current state is specially: return when terminal is in idle condition.
Compared with prior art, the invention has the beneficial effects as follows: the present invention is by providing STK (SIM Development Tools Kit in USIM, the SIM card development kit) in the secondary development function module timer is set, reset the short search cycle according to terminal acceptable time dimension, return the HPLMN at terminal place then according to the relevant information of the HPLMN that stores among the USIM, thereby realized the quick reselection functionality of PLMN.
Further, in order to prevent that terminal from recurring repeatedly HPLMN gravity treatment in the short relatively search cycle that USIM sets, the present invention is provided with the last mark whether the HPLMN gravity treatment takes place of record, when carrying out once more gravity treatment fast, at first check whether just gravity treatment fast took place by this mark, if, then the search cycle of setting in the USIM is prolonged, thereby avoided the ping-pong reselection phenomenon, make the present invention obtain further optimization.
Adapt with it, after the present invention is defined in terminal and in a single day turns back to home network HPLMN, USIM just no longer activates the quick reselection functionality of HPLMN, even the timer among the USIM lost efficacy, and refresh HPLMN gravity treatment mark on the USIM, do not switch after making or just can continue to carry out gravity treatment when roaming according to the basic HPLMN reselection functionality of prior art.
In addition, the present invention will judge that the parameters such as the necessary frequency of HPLMN of terminal are permanently logged in the USIM, make terminal behind hot reset, needn't select to attempt to all PLMN of current region, select to attempt and directly carry out HPLMN, thereby shortened turn-on time according to the HPLMN information that writes down among the USIM.
Simultaneously, the present invention writes the HPLMN relevant parameter that writes down among the USIM in the PLMN associated documents of the USIM that priority level is the highest behind the terminal hot reset, make terminal at first from this document, search the relevant information of HPLMN, thereby further quickened the network reselection time.
Description of drawings
Fig. 1 is the flow chart of a specific embodiment of the present invention.
Embodiment
During in mobile terminal MS start back or at roaming state, its top priority is to find network and get in touch to obtain service with network, and the purpose of PLMN selection/reselection is to select an available PLMN.The content of PLMN file can be made amendment by the interface that terminal provides by the user by operator's initialization.Doing so especially to provide some convenient through the user of regular meeting's international roaming to the user, and satisfies user's oneself hobby and demand.For example, the user of China Mobile roams into abroad, and there are several PLMN in the locality, and these PLMN have signed roaming agreement with China Mobile, the user can select PLMN according to service quality, type and the hobby of oneself that each PLMN provides so, to obtain oneself more satisfied service.
For reaching this purpose, MS can keep a PLMN tabulation, and these tabulations are stored among the associated documents EFPLMN of USIM, with PLMN according to priority arrangement, after mobile phone powers on this file content is read in its internal memory, search for downwards from high priority then, find PLMN with limit priority.The selection of PLMN and gravity treatment have automatic, manual two kinds of patterns.When automatic network selection, MS selects a PLMN automatically according to the priority orders of PLMN, and manually network selection is then presented to the user with all current available networks, selects a PLMN by the user.No matter be automatic network selection or manual network selection, after the MS start, at first attempt RPLMN (Registered PLMN), promptly the PLMN that succeeded in registration last time no longer includes subsequent operation after the success; If unsuccessful, MS then generates a PLMN tabulation according to priority, and HPLMN priority is the highest in this tabulation.
When below taking place during two kinds of situations, need carry out the PLMN gravity treatment:
1) under any circumstance, with can manually requiring to initiate the PLMN gravity treatment per family;
2) if communication is switched to other PLMN, this PLMN is called the user and registers to VPLMN (Visited PLMN, the visit public land mobile network), the user registers to the network reselection of VPLMN: the user is because of after reasons such as handoff/roam register to VPLMN, because VPLMN is identical with the MCC of HPLMN, only MNC difference, so MS can be judged this situation, and gets back to the network HPLMN of ownership as far as possible.Concrete measure is that MS periodically searches home network, and the cycle of the prior art is stipulated by USIM, at the associated documents EF of USIM
HPLMNMiddle definition, scope was from 6 minutes to 8 hours.
The invention provides the method for a kind of quick selection PLMN, its core be by in USIM for the user carries out in the secondary development STK functional module, set new search time according to user's acceptable time dimension.
Use when of the present invention, the basic parameter of the Home Public Land Mobile Network network HPLMN of record terminal in USIM USIM at first, described parameter is to be used for the necessary relevant parameter of gravity treatment PLMN, as frequency etc.;
In USIM USIM, timer is set then, and sets the acceptable search cycle of user; This cycle can be provided with the requirement of business according to the user;
When arriving the timer predetermined period, judge according to terminal equipment and the interactive information between the USIM USIM whether current public land mobile network PLMN is identical, judge that whether identical PLMN method same as the prior art, concrete determination methods will be in conjunction with describing in detail among the embodiment hereinafter;
If it is inequality, then switch to the Home Public Land Mobile Network network HPLMN of terminal according to described Home Public Land Mobile Network network HPLMN parameter, because the present invention will judge parameter such as the necessary frequency of PLMN and be stored among the USIM in advance, therefore when carrying out gravity treatment, directly arrive HPLMN according to the quick gravity treatment of the relevant parameter of HPLMN.
In order to prevent that terminal from recurring repeatedly HPLMN gravity treatment in the short relatively search cycle that USIM sets, the present invention is provided with the last mark whether the HPLMN gravity treatment takes place of record, when carrying out gravity treatment once more, at first check whether just gravity treatment took place by this mark, if, then the search cycle of setting in the USIM is prolonged, thereby avoided the ping-pong reselection phenomenon, made the present invention obtain further optimization.
Adapt with it, after the present invention is defined in terminal and in a single day turns back to original network, USIM just no longer activates the quick reselection functionality of HPLMN, even the timer among the USIM lost efficacy, and the HPLMN gravity treatment mark on the removing USIM, make that later on just base can continue to carry out gravity treatment according to the basic HPLMN reselection functionality of prior art.
In the present invention, the parameters such as the necessary frequency of HPLMN of judging terminal are permanently logged in the USIM, make terminal behind hot reset, needn't select to attempt to all PLMN of current region, select to attempt and directly carry out HPLMN, thereby shortened turn-on time according to the HPLMN information that writes down among the USIM.
Simultaneously, the present invention writes the HPLMN relevant parameter that writes down among the USIM in the PLMN associated documents of the USIM that priority level is the highest behind the terminal hot reset, makes terminal at first search the relevant information of HPLMN from this document, thereby has further quickened the gravity treatment time.
It is the third generation mobile WCDMA system of (being called for short 3G) that a typical case of the present invention uses.Because the WCDMA coverage rate is not as good as the GSM wide network coverage, so 3G subscription can be roamed or switch in the GSM network at any time.In order to realize WCDMA user when entering the WCDMA network's coverage area, can be automatically by the GSM network preferably to the WCDMA network, can be different PLMN with WCDMA, GSM network settings, and WCDMA is set in USIM be HPLMN.By the PLMN gravity treatment, the user can return the WCDMA network as early as possible by the GSM network.Below use process of the present invention to describe in detail it as a more excellent embodiment of the present invention.
First embodiment: in the present embodiment, at first, the basic parameter of permanent recording WCDMA mobile operator in USIM.Described basic parameter comprises essential informations such as frequency.In the prior art, take interim method of preserving for these basic parameters, if the user shuts down for a long time, then USIM empties the information of preserving, after terminal re-powers, MS will scan all available frequencies in the current region, carry out access attempts then one by one, the present invention takes to select the essential parameter of PLMN network to carry out the mode of permanent recording these, make terminal behind hot reset, needn't attempt to all PLMN of current region, attempt but directly carry out corresponding frequency incision, thereby shortened turn-on time according to the frequency point information that writes down among the USIM.
As indicated above, because the search cycle of the prior art is at the associated documents EF of USIM
HPLMNThe scope of middle definition is 6 minutes to 8 hours, can not satisfy the needs of user long search time to business, if and prior protocols is made amendment, each operator readjusting network will be involved, influence the stable of existing network, therefore in the present embodiment, in the functional module of Gong the user secondary development of USIM, be provided with a timer in addition, be set to the cycle of lacking relatively search time.
In addition, the interactive information that makes full use of between mobile phone terminal equipment and the USIM of the present invention is judged the current PLMN network reselection that whether needs to carry out.The interaction message time interval is generally about 30ms between mobile phone terminal and the USIM, terminal be can comprise in the message and the necessary MCC information of other PLMN MNC information and LAC (Location area code whether entered, location area code) information, MNC is different if information such as the MCC that comprises in the discovery information, MNC are identical with information MCC in being stored in IMSI, judges then that network takes place to intersect to cover.
WCDMA coverage hole for fear of GSM has covered carries out the quick gravity treatment of HPLMN repeatedly, and USIM can write down the quick gravity treatment mark of HPLMN last time, for example described mark is designated as True or False, and whether expression carried out network reselection.
Fig. 1 utilizes the present invention to carry out the flow chart of network reselection.As shown in the figure, the user is because of after reasons such as handoff/roam register to VPLMN, when shaking hands timer after the time of advent, mobile phone terminal equipment will and USIM between carry out information interaction (step 1);
After the search cycle of the gravity treatment timer that arrives the USIM customization, USIM obtains attached to the above-mentioned information (step 2) in the network;
USIM is by the essential information of the GSM network judging current terminal roaming and arrive, judges whether may exist with 3G as MCC, MNC, LAC etc. and intersects covering, and concrete judgment principle has the basic function decision (step 3) of mobile phone;
If detected MNC is identical with MNC among the IMSI, illustrate that then the user is not in the network of other operators, then do not carry out quick gravity treatment based on the HPLMN of usim card, mobile phone has monitored the coverage information of GSM, WCDMA else if, promptly judging needs the HPLMN gravity treatment, and USIM initiates the relevant action of following steps:
When carrying out gravity treatment, at first check the gravity treatment mark that sets in advance, if find to have carried out in the short period of time the continuous several times gravity treatment, USIM can change the HPLMN gravity treatment time interval, the proper extension search cycle, refresh this mark (step 4) simultaneously, thereby the present invention further is optimized, avoid possible ping-pong reselection phenomenon;
Judge whether to meet the HPLMN reselection conditions (step 5) of USIM control, if do not meet, then do not carry out gravity treatment, otherwise, when judgement need be carried out gravity treatment, the permanent WCDMA network-related parameters that writes down among the USIM is write the RPLMN tabulation (step 6) of USIM; A file EF is arranged in usim card
LOCI, in this document, write down MCC and MNC.The purpose of this step mainly is that the characteristic of at first attempting the RPLMN gravity treatment designs according to after the regulation MS start in present 3GPP TS 31.102 related protocols, and purpose is in order to quicken gravity treatment speed.
Then, USIM initiates the order of warmRest hot reset to terminal, force terminal to carry out warm start or simulate manual network selection mode (step 7), make terminal attempt selecting RPLMN again, information according to RPLMN in the above-mentioned steps, do not need to search for again aerial information, directly navigate to the HPLMN (step 8) that needs gravity treatment, the HPLMN gravity treatment accelerates;
In a single day the user turns back to WCDMA HPLMN network, and usim card just no longer activates the quick gravity treatment of this HPLMN, and removes the quick gravity treatment mark of HPLMN on the USIM, the basic HPLMN reselection functionality that just defines based on 3GPP later on.
Consider the future development trend of the communications field, the present invention is not limited only to the network reselection of HPLMN, also can be applicable to portable terminal carries out network reselection between other PLMN networks situation.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. the reselecting method of a public land mobile network PLMN is characterized in that, comprises step:
1) the Home Public Land Mobile Network network HPLMN parameter of record terminal in USIM USIM;
2) in USIM USIM, timer is set;
3) when arriving the timer predetermined period, judge according to terminal equipment and the interactive information between the USIM USIM whether current public land mobile network PLMN is identical;
4) if inequality, then reselect network and the gravity treatment mark is set, to turn back to the HPLMN of terminal according to described HPLMN parameter;
5) carry out before the gravity treatment once more whether having gravity treatment record in the scheduled time, if then prolong described timer predetermined period, and after each gravity treatment, upgrade described gravity treatment mark according to described gravity treatment marker for judgment.
2. the reselecting method of public land mobile network according to claim 1 is characterized in that, the described handoff procedure of step 4) is specially:
41) described parameter is write the file of the highest public land mobile network PLMN of priority;
42) initiate hot reset information to terminal;
43) from described file, obtain described parameter, turn back to the Home Public Land Mobile Network network HPLMN of terminal according to the terminal current state.
3. the method for switching public land mobile network according to claim 1 and 2 is characterized in that, the described permanent recording that is recorded as of step 1).
4. the reselecting method of public land mobile network according to claim 1 and 2 is characterized in that, described parameter comprises Home Public Land Mobile Network network frequency point information.
5. the reselecting method of public land mobile network according to claim 1 is characterized in that, described interactive information comprises mobile national coding MCC, mobile network encode MNC and location area code LAC.
6. the reselecting method of public land mobile network according to claim 1 is characterized in that, also comprises:
After terminal was returned Home Public Land Mobile Network network HPLMN, USIM USIM cancelled timer, and removed the gravity treatment mark on the USIM USIM.
7. the reselecting method of public land mobile network according to claim 2 is characterized in that step 41) public land mobile network PLMN that described priority is the highest is the public land mobile network RPLMN of registration last time.
8. the reselecting method of public land mobile network according to claim 2 is characterized in that step 43) the described process of returning according to the terminal current state is specially:
When being in idle condition, terminal returns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100917375A CN100396150C (en) | 2004-11-25 | 2004-11-25 | Re-option of public land mobile network |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100917375A CN100396150C (en) | 2004-11-25 | 2004-11-25 | Re-option of public land mobile network |
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| CN1780477A CN1780477A (en) | 2006-05-31 |
| CN100396150C true CN100396150C (en) | 2008-06-18 |
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| CNB2004100917375A Expired - Fee Related CN100396150C (en) | 2004-11-25 | 2004-11-25 | Re-option of public land mobile network |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925142B (en) * | 2009-06-17 | 2014-06-11 | 华为技术有限公司 | Cell switching control method, network equipment and system |
| CN102469548A (en) * | 2010-11-05 | 2012-05-23 | 中兴通讯股份有限公司 | Access handling method, device and system |
| US20160127884A1 (en) * | 2013-07-18 | 2016-05-05 | Lg Electronics Inc. | Plmn selection method, and user equipment (as amended) |
| US10368294B2 (en) | 2014-02-06 | 2019-07-30 | British Telecommunications Public Limited Company | Method and apparatus for determining a network search parameter in a mobile communications network |
| EP3103286B1 (en) * | 2014-02-06 | 2023-04-12 | British Telecommunications public limited company | Method and apparatus for determining a network search parameter in a mobile communications network |
| EP3103288B1 (en) * | 2014-02-06 | 2023-04-12 | British Telecommunications public limited company | Method and apparatus for determining a network search parameter in a mobile communications network |
| CN105611603B (en) * | 2014-11-20 | 2019-05-07 | 华为终端（东莞）有限公司 | Cell selecting method and device |
| CN105792318A (en) * | 2014-12-22 | 2016-07-20 | 中兴通讯股份有限公司 | Method and device for searching priority network |
| CN107734582B (en) * | 2017-11-28 | 2020-07-14 | 中国联合网络通信集团有限公司 | Public land mobile network reselection method and user equipment |
| CN108718457B (en) * | 2018-06-11 | 2021-04-09 | Oppo广东移动通信有限公司 | Network reselection method, device, chip and storage medium |
| CN111179390B (en) * | 2019-12-27 | 2023-07-28 | 上海咔咖文化传播有限公司 | Method and device for efficiently previewing CG (content distribution) assets |
| WO2021134175A1 (en) * | 2019-12-30 | 2021-07-08 | 华为技术有限公司 | Roaming method and apparatus, and system |
| CN111106844B (en) * | 2019-12-31 | 2022-02-11 | 上海寰创通信科技股份有限公司 | Switching method of universal user identification card of vehicle-mounted access unit |
| CN112165718B (en) * | 2020-10-23 | 2022-12-23 | 展讯通信（上海）有限公司 | Network configuration method and device of terminal, storage medium, terminal and baseband chip |
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