The HPLMN reselecting method of customer mobile terminal
Technical field
The present invention relates to a kind of terminal access technology of mobile communication, relate in particular to a kind of HPLMN (Home Public Land Mobile Network) reselecting method of customer mobile terminal.
Background technology
Now, second generation mobile communication 2G is to 3G (Third Generation) Moblie 3G development, and second generation mobile communication 2G can coexist a very long time with 3G (Third Generation) Moblie 3G in evolution.Especially, at the 3G networking initial stage, 3G network is not also realized covering continuously comprehensively, and when replacing the 2G network fully, more needs and existing 2G network is realized intercommunication, shared network resource.
In the network environment of 2G network and 3G network coexistence, when 3G mobile moves to that 3G network can not cover and the 2G network can cover local time, needs can carry out the search and the switching of network.
The search of network and switching can be carried out fully automatically, also can carry out in conjunction with artificial instant selection is auxiliary; But the continuous speech in order to guarantee in communication process to switch covers, and should adopt switching mode fully automatically.
Described automatic switching mode is meant that mobile phone transfers to the place of having only the another kind of network coverage from a kind of place of the network coverage, and network switches can excite and finish switching automatically.But, when transfer to that two kinds of networks all cover local time, present mobile phone, general default application 2G network is perhaps used original network of using (being the network of current application).
Therefore, the previous important problem of order is exactly, in the place that 2G network and 3G network all cover, how to guarantee to enjoy as far as possible when 3G subscription is enjoyed continuous speech business covering the 3G business, particularly transfer to how in time to switch to 3G network local time 2G network and 3G network all cover from the place of having only the 2G network coverage, to obtain better service at 3G mobile.
A kind of way is the 2G network that all 3G networks of upgrading cover the edge.After 3G subscription is held dual-mode handset and left the 3G network overlay area, can roam into the 2G network, after 3G subscription turns back to the zone that 3G network can cover, also roam into 3G network by the sub-district gravity treatment by the sub-district gravity treatment.All 3G networks cover the 2G network at edge but this need upgrade, and along with the construction of 3G network, 3G network covers the edge also can constantly be changed, and being accompanied by also needs to upgrade the more 2G network equipment, big to the 2G web influence.
Another kind of way is that the 2G network is not done upgrading, Public Land Mobile Nerwork PLMN number different with the 2G network allocation of 3G network, HPLMN gravity treatment timer EF is set in the USIM usim card
HPLMN3G subscription hold dual-mode handset arrive do not have the 3G network overlay area after, can roam into the 2G network by the sub-district gravity treatment, after 3G subscription turns back to 3G network, again can by HPLMN regularly gravity treatment roam back 3G network.So just reached and 3G subscription has been enjoyed enjoy the 3G business as far as possible when continuous speech business covers.But when the 2G of operator, 3G network use be identical PLMN the time, then this method is inapplicable.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of need not to adjust PLMN number, can preferentially select for use the specified type network to provide continuous speech the professional customer mobile terminal HPLMN reselecting method that covers automatically.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of Home Public Land Mobile Network HPLMN reselecting method of customer mobile terminal, comprising:
A, the network access mode that in customer mobile terminal USIM card, is provided with HPLMN number and preferentially adopts;
B, customer mobile terminal carry out the search of HPLMN and select according to HPLMN number that is provided with in the described USIM card and the preferential network access mode that adopts;
When the HPLMN access way that sets in advance was selected field for sky, customer mobile terminal carried out the search selection of HPLMN according to HPLMN number; When the HPLMN access way that sets in advance was selected field not for sky, customer mobile terminal carried out the selection of HPLMN according to HPLMN number with the preferential network access mode that adopts.
HPLMN described in the present invention number and the preferential network access mode that adopts are arranged at the HPLMN access way of described subscriber identification module usim card and select in the field.
Among the present invention, select to be provided with in the field inequality with the HPLMN access way of network access mode and usim card the PLMN of current access number, and, it is not 0 o'clock at interval that the HPLMN of current usim card heavily searches the search time again that timer sets, then according to the HPLMN of usim card heavily search carry out at interval search time again that timer sets HPLMN search for again, select in the PLMN number HPLMN access way selection field with network access mode and its usim card identical network is set.
The HPLMN that described customer mobile terminal inserts is a kind of 3G network.
Described 3G network is a universal mobile telecommunications system UMTS network.
The network access mode that the HPLMN access way of customer mobile terminal usim card is selected to be provided with in the field in the described steps A is the access way that a kind of 3G network matches.
The access way that described 3G network matches is that the land radio access web UTRAN by the UMTS network inserts.
As seen from the above technical solution provided by the invention, the present invention selects field EF by the HPLMN access way at customer mobile terminal USIM usim card
HPLMNwAcTIn be provided with HPLMN number and the preferential network access mode that adopts, make customer mobile terminal preferentially to select for use and adopt usim card EF
HPLMNwAcTThe HPLMN of the middle network access mode that is provided with, in carrying out the HPLMN reuse adoption process, judge PLMN and network access mode simultaneously, even if thereby make when identical PLMN occurring, also can preferentially select for use the network of specified type to provide continuous speech professional covering, to obtain better mobile communication service such as 3G network.The present invention need not existing HPLMN gravity treatment technology has also been contained in the upgrading of making amendment of the code of the software systems of the network equipment itself, and more flexible function selecting is provided.
Description of drawings
Fig. 1 is a handling process schematic diagram of the present invention.
Embodiment
Core concept of the present invention is to insert by the HPLMN at customer mobile terminal USIM usim card to select field EF
HPLMNwAcTIn be provided with HPLMN number and the preferential network access technique that adopts, in carrying out the HPLMN reuse adoption process, judge PLMN and network access mode simultaneously, even if make when identical PLMN occurring, the network that also can preferentially select specified type for use is such as the network that adopts 3G technology, to obtain better mobile communication service.
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, to carry out EF in the usim card in the handling process of the present invention
HPLMNwAcTSetting, promptly take steps 11: EF is being set
HPLMNwAcTThe time, the network access mode that should indicate HPLMN number of customer mobile terminal and preferentially adopt.Wherein, usim card EF
HPLMNwAcTIn HPLMN number with this card IMSI International Mobile Subscriber Identity field EF
IMsIIn HPLMN be consistent.As a rule, EF
HPLMNwAcTHPLMN number that is provided with all is the network that has more flexible function, adopts more advanced mode with the preferential network access mode that adopts, so that obtain better mobile communication service.Under the present art, the HPLMN of appointment can be a 3G network, and adopting network access mode also is the access way that matches.Such as UMTS network that adopts WCDMA and supporting Access Network UTRAN thereof.
Otherwise, shown in step 12, when being EF
HPLMNwAcTBe set to sky the time, will take steps 13, promptly when the HPLMN gravity treatment, select with original mode, i.e. Mo Ren selection normally inserts the GSM network.
Set EF
HPLMNwAcTAfter, customer mobile terminal will take steps 14 promptly to wait for or carry out other processing;
Mobile phone power-on or fall net after search automatically in the network process, when perhaps the access way of the PLMN of current access and employing changes, the access way that can judge the PLMN of current access and employing whether with HPLMN and EF
HPLMNwAcTThe middle network access mode unanimity that is provided with is shown in step 15;
If inconsistent, and usim card EF
HPLMNIn value (value is to represent not carry out to search for again selection at 0 o'clock; Be meant when being not 0 and heavily search at interval that this is heavy searches and the shortlyest at interval can be set to 6 minutes, can be provided with by 6 minutes multiple and heavily search at interval) be not 0 o'clock, shown in step 16, then take steps 17, i.e. search and preferentially select for use and adopt EF again
HPLMNwAcTThe HPLMN of the middle network access mode that is provided with.
Otherwise, as the EF of usim card
HPLMNThe middle search cycle that is provided with is 0 o'clock, even the access way of the PLMN of current access and employing and HPLMN and EF
HPLMNwAcTWhen the middle network access mode that is provided with is consistent, do not search for again yet, return step 14 and carry out other processing or wait.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.