CN107182047B

CN107182047B - Network searching method and device for international roaming

Info

Publication number: CN107182047B
Application number: CN201710581253.6A
Authority: CN
Inventors: 苗承强
Original assignee: Hisense Mobile Communications Technology Co Ltd
Current assignee: Hisense Mobile Communications Technology Co Ltd
Priority date: 2017-07-17
Filing date: 2017-07-17
Publication date: 2020-06-09
Anticipated expiration: 2037-07-17
Also published as: CN107182047A

Abstract

The invention discloses a network searching method and device for international roaming, and belongs to the field of communication. The method comprises the following steps: when the first user identification card is rejected from searching the visited operator network, judging whether the second user identification card is successfully registered with the network; if yes, judging whether the first user identification card and the second user identification card belong to the same network operator; if so, acquiring PLMN, access frequency point and cell ID information of the second user identification card registration network; and finally, searching the network again by the first user identification card according to the PLMN, the access frequency point and the cell ID information of the second user identification card registration network. The invention can improve the probability of successful network searching of the dual-card mobile terminal in the international roaming state.

Description

Network searching method and device for international roaming

Technical Field

The present invention relates to the field of communications, and in particular, to a network searching method and apparatus for international roaming.

Background

With the rapid development of mobile communication technology and intelligent terminal equipment, it is very common to use mobile terminal equipment in foreign roaming places in daily life and work (such as business trips, etc.), so that roaming network searching becomes a common function of mobile terminals.

The existing international roaming Network searching method is that after a Mobile terminal roams to a visited place and is started for the first time, it cannot know which Network the Mobile terminal resides in, so that the Mobile terminal tries Available public land Mobile networks and tries to connect in a searched Available public land Mobile Network List (APLMN), and generally tries to connect according to a Network searching sequence of 4G-3G-2G.

For the existing network searching method, the inventor finds that the following problems exist:

in order to save resources and cost, the existing operator uses the same PLMN for networks of different systems 4G, 3G, and 2G, for example, although the PLMN of the chinese mobile TDD-LTE network is 46007, the PLMN of the TD-SCDMA network is 46002, and the PLMN of the GSM network is 46000 during PLMN planning, actually, the PLMNs of the networks of the three systems are 46000. This problem also exists in many other countries, such as 44020 for all network standards under the SoftBank operator in japan and 45005 for all network standards of the SK operator in korea.

Since some mobile terminal subscriber identity card home country and roaming country do not sign LTE roaming agreement and only sign 3G or 2G roaming agreement, with China Unicom, it only signs 3G and 2G roaming agreement and does not sign 4G roaming agreement with American network operators Cincinnati Bell and Addite network operators DU and Etisalat. Therefore, under the current PLMN usage, when the mobile terminal roams to a visited place where the above situation exists according to the existing network searching strategy, after the search for the 4G network is rejected, the corresponding PLMN is added to the FPLMN list, and since the 3G and 2G networks are consistent with the PLMN of the 4G network, the PLMN is added to the FPLMN list, then the network search is no longer performed for the 3G and 2G networks subscribed by the home country with the visited place, so that the mobile terminal cannot register the operator network of the roaming visited place.

Disclosure of Invention

The invention provides a network searching method and device for international roaming, aiming at solving the problem that 3G and 2G cannot successfully search for a network due to refusal of 4G network searching when a mobile terminal is in international roaming. The technical scheme is as follows:

in a first aspect, the present application provides a network searching method for international roaming, applied to a dual-card mobile terminal having a primary card and a secondary card, the method comprising:

when the main card is refused to search the visited operator network, judging whether the auxiliary card successfully registers the network;

if yes, judging whether the main card and the auxiliary card belong to the same network operator;

if yes, acquiring PLMN, access frequency point and cell ID information of the auxiliary card registration network;

and searching the network again by the main card according to the PLMN, the access frequency point and the cell ID information of the auxiliary card registration network.

Optionally, after obtaining PLMN, access frequency point, and cell ID information of the secondary card registration network, the method further includes:

judging whether the PLMN of the visited operator network rejecting the primary card is consistent with the PLMN of the successfully registered network of the secondary card;

if yes, judging whether the PLMN of the network successfully registered by the auxiliary card exists in the main card FPLMN;

if yes, deleting the PLMN of the auxiliary card successfully registered with the network from the FPLMN, and deleting the network type rejected by the visited operator network from the main card;

determining whether a PLMN of the visited operator network rejecting the primary card is consistent with a PLMN of a successfully registered network of the secondary card,

and if the registration information is inconsistent with the registration information, the main card searches the network again according to the PLMN, the access frequency point and the cell ID information of the registered network of the auxiliary card.

Optionally, when the primary card is rejected from searching for the visited operator network, determining whether the secondary card successfully registers the network further includes:

and judging whether the dual-card mobile terminal is in an international roaming state.

Optionally, the determining whether the primary card and the secondary card belong to the same network operator includes:

judging whether the IMSI information of the main card is consistent with the IMSI information of the auxiliary card;

and if the two cards are consistent, the main card and the auxiliary card belong to the same network operator.

In a second aspect, the present application provides a network searching apparatus for international roaming, which is applied to a dual-card mobile terminal having a primary card and a secondary card, and comprises:

the first judgment module is used for judging whether the auxiliary card successfully registers the network or not when the main card searches the visited operator network and is rejected;

the second judgment module is used for judging whether the main card and the auxiliary card belong to the same network operator or not when the main card searches the visited operator network and is rejected and the auxiliary card successfully registers the network;

the acquisition module is used for acquiring PLMN, access frequency points and cell ID information of the auxiliary card registration network;

and the network searching module is used for searching the network again by the main card according to the PLMN, the access frequency point and the cell ID information of the auxiliary card registration network.

Optionally, the apparatus further comprises:

and the third judging module is used for judging whether the PLMN of the visited operator network rejecting the main card is consistent with the PLMN of the successfully registered network of the auxiliary card.

Optionally, the network searching module is configured to:

when the PLMN of the visited operator network rejecting the main card is consistent with the PLMN of the successfully registered network of the auxiliary card, judging whether the PLMN of the successfully registered network of the auxiliary card exists in the FPLMN of the main card;

if yes, deleting the PLMN of the auxiliary card successfully registering the network from the FPLMN, and deleting the network type rejected by the visited operator network from the main card;

Optionally, the apparatus further comprises:

and the fourth judging module is used for judging whether the dual-card mobile terminal is in the international roaming state.

Optionally, the second determining module is configured to:

The technical scheme provided by the invention has the beneficial effects that: in the embodiment of the invention, when the network of the operator at the visit place searched by the main card of the double-card mobile terminal is rejected, the PLMN, the access frequency point and the cell ID information of the auxiliary card registration network which belongs to the same network operator as the main card and successfully registers the network are obtained, and the network searching is carried out again. The problem that the 3G and 2G cannot successfully search the network due to the fact that the 4G network searching is refused by the main card is solved, and the success rate of network searching of the double-card mobile terminal in the international roaming state is improved.

Drawings

Fig. 1A is a schematic view of an application scenario of a network searching method for international roaming according to the present invention;

FIG. 1B is a diagram illustrating international roaming of a mobile terminal according to the present invention;

fig. 2 is a flowchart of a network searching method for international roaming according to the present invention;

fig. 3 is a flowchart of another network searching method for international roaming according to the present invention;

fig. 4A is a schematic structural diagram of a network searching apparatus for international roaming according to the present invention;

fig. 4B is a schematic structural diagram of another network searching apparatus for international roaming according to the present invention;

fig. 5A is a schematic structural diagram of another network searching apparatus for international roaming according to the present invention;

FIG. 5B is a schematic diagram of a web searching module provided in the present invention;

fig. 6A is a schematic structural diagram of a mobile terminal according to the present invention;

fig. 6B is a schematic structural diagram of a communication module according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Before explaining the embodiments of the present invention in detail, terms and application scenarios related to the embodiments of the present invention are explained separately.

First, terms related to embodiments of the present invention are explained.

PLMN

A PLMN (Public Land Mobile Network) is a Network established and operated by the government or an operator approved by the Public for the purpose of providing a Land Mobile communication service to the Public. PLMN = MCC + MNC, where MCC is a mobile country number, consisting of 3 digits, uniquely identifying the country to which the mobile client belongs, e.g. 460 in china, 316 in the us and 525 in singapore. The MNC is a mobile network number, consisting of 2 digits, used to identify the mobile network to which the mobile client belongs. For example, the China Mobile GSM, TD-SCDMA, LTE are 00/02/07 respectively, the China Unicom GSM is 0l, and the China telecom CDMA is 03.

HPLMN

Hplmn (home PLMN) is PLMN for which home USIM corresponds to IMSI.

FPLMN

FPLMN (Forbidden PLMN) is a PLMN that is prohibited from accessing, and usually the terminal adds it to the list after attempting to access a certain PLMN is rejected.

VPLMN

The VPLMN (Visited PLMN) UE maintains a VPLMN list in the memory, and stores PLMN identification information delivered by the Visited network.

IMSI

The IMSI International Mobile Subscriber Identity (IMSI) is a flag for distinguishing a Mobile Subscriber, is stored in the SIM card, and can be used to distinguish valid information of the Mobile Subscriber.

Mobile terminal

The mobile terminal refers to a communication terminal device having the capability of connecting a mobile communication network and a wireless network, and includes but is not limited to: a mobile phone, a smart television, a tablet Computer, a UMPC (Ultra-mobile Personal Computer), a netbook, a PDA (Personal Digital Assistant), and the like.

Next, an application scenario related to the embodiment of the present invention is described.

Referring to fig. 1, which is a schematic view illustrating an application scenario of the international roaming network searching method provided in the embodiment of the present invention, a mobile terminal roams from a country in a home location a to a country in a visited location B, and performs network search, cell selection, and location registration to achieve successful network access in a network coverage area in the visited location.

Referring to fig. 2, a flowchart of an international roaming network searching method according to an embodiment of the present invention is shown, where the method is applicable to the application scenario shown in fig. 1. The method comprises the following steps:

step 201: and when the first user identification card is rejected from searching the visited operator network, judging whether the second user identification card is successfully registered with the network.

Specifically, when the mobile terminal enters an international roaming visited place, an attach request is sent to the visited place operator 4G network when the mobile terminal is powered on, and since the visited place network operator does not subscribe a 4G roaming agreement with the home place operator of the subscriber identity card (for a dual-card mobile terminal, the subscriber identity card is the first subscriber identity card) inserted into the mobile terminal, the visited place operator network does not allow the mobile terminal to access the 4G network, and simultaneously sends an attach reject message to the mobile terminal, and carries the reason for the attach reject. Specifically, when the mobile terminal enters the international roaming visited place, a location update request is sent to the visited place operator network, and when a location update receiving message replied by the network is received, the second user identification card is considered to be successfully registered to the network.

It should be noted that the first subscriber identity card and the second subscriber identity card may be any one of a SIM card and a USIM, where the USIM card supports 4G and is compatible with 3G and 2G networks, and the SIM card does not support 4G networks. In a possible implementation manner, the first subscriber identity card may be a USIM card, and the second subscriber identity card may be a SIM card; in another possible implementation, the first subscriber identity card may be a USIM card, and the second subscriber identity card may be a USIM card. For the current dual-card mobile terminal, when two user identification cards are inserted into the dual-standby mode at the same time, only the user identification card in the main card slot can support 4G, and the user identification card in the auxiliary card slot can only support 3G and 2G. Therefore, no matter whether the second subscriber identity card is a SIM card or a USIM card, when the second subscriber identity card is a secondary card, only a 3G or 2G network can be supported in the dual standby mode, and a 4G network cannot be supported.

Because the first subscriber identity module card is the main card and supports the 4G network in the dual standby mode, when the dual-card mobile terminal roams to a foreign visited place, the first subscriber identity module card can search the network according to the network searching sequence of 4G-3G-2G. When the home location of the card and the visited location do not sign a 4G roaming agreement, the dual-card mobile terminal conducting 4G network searching with the first subscriber identity card will be rejected, and the PLMN of the visited location will also be written into the FPLMN corresponding to the first subscriber identity card. Because the PLMN at the visited place is written into the FPLMN, the first subscriber identity card will not search for the 3G or 2G network at the visited place any more, thereby causing a failure in network search. As mentioned above, the second subscriber identity card is a secondary card, only 3G and 2G networks are supported in the dual standby mode, and since the home country of the card signs a roaming agreement between 3G and 2G with the visited place, the card can successfully register with the 3G or 2G network, preferably with the 3G network, and then with the 2G network when the 3G network does not exist.

Step 202: if yes, whether the first subscriber identity module card and the second subscriber identity module card belong to the same network operator is judged.

Specifically, the IMSI of the first subscriber identity card and the IMSI of the second subscriber identity card are obtained, and whether the first subscriber identity card and the second subscriber identity card belong to the same network operator is determined. Since the first three digits of the IMSI number are country code, the last two digits are operator type, for example, the IMSI in china mobile is 46000, the IMSI in china unicom is 46002, and the IMSI in china telecom is 46003. In a preferred embodiment, it is determined whether the first three digits coincide with each other, and if so, it is further determined whether the last two digits coincide with each other, and if so, it is determined that the two subscriber identity cards belong to the same network operator. For example, if the first subscriber identity card is a china mobile card and the second subscriber identity card is a china unicom card, the IMSIs of the first subscriber identity card and the second subscriber identity card are read as 46000 and 46003 respectively, the first three digits are both 460, the country is china, and if the two digits are further determined that one 00 and the other 00 is 03 and are not consistent, it is determined that the two subscriber identity cards do not belong to the same network operator.

Step 203: and if so, acquiring PLMN, access frequency point and cell ID information of the second subscriber identity module card registration network.

For the purpose of understanding the present step, the following description is made with reference to a registration procedure after a mobile terminal (UE) is powered on.

1) UE autonomously selects PLMN according to priority order

UE AS (Access Stratum) initial cell search (measuring the signal strength of the cell, reporting the available PLMN identity to NAS, reading all PLMNs from SIB1 and it reports to UE NAS (Non Access Stratum), which will select one of them according to this predefined priority.

2) Frequency selection

If the UE can store the frequency point information when the UE is powered off last time, trying to reside on a cell which is resided last time possibly after the UE is powered on; if no prior information exists, the method is likely to search in the full frequency band, find the frequency point with stronger signal and try to reside.

3) Cell search (obtaining PCI and downlink synchronization)

And receiving a PSS (primary synchronization signal) and an SSS (secondary synchronization signal) around the central frequency point determined in the last step, wherein the two signals and the system bandwidth are not limited and can be directly detected and received, and the cell ID can be obtained according to the two signals and the system bandwidth.

4) Obtaining system messages

Completing cell search requires receiving SIB, i.e., UE receives BCCH information carried on PDSCH.

5) Cell selection

Cell selection is mainly to select a suitable Cell and camp the handset on the Cell.

6) Initial attachment (PLMN registration)

After the UE completes PLMN and Cell selection, it initiates a location registration procedure (location registration) to report the location of the mobile phone to the mobile network.

Therefore, optionally, if the mobile terminal acquires PLMN, access frequency point and cell ID information of the network, the initial attachment may be successfully performed. In this step, PLMN, access frequency point and cell ID information of the second subscriber identity card registration network are obtained, and used in step 205 for the first subscriber identity card to perform network search according to these information.

Step 205: and searching the network again by the first user identification card according to the PLMN, the access frequency point and the cell ID information of the second user identification card registered network.

For example, a user in country a roams to china with a dual-card mobile terminal, wherein country a and china do not subscribe to the 4G roaming agreement but to the 3G and 2G roaming agreements. The network searching of the first user identification card of the dual-card mobile terminal is refused, and the second user identification card is successfully registered in the China Mobile 3G network, the PLMN of the network in which the second user identification card is successfully registered is obtained and is 46000, the access frequency point information is 1900 (the China Mobile TD-SCDMA access frequency band is 1880-1920), and the cell ID is cf76, so that the first user identification card can search the available China Mobile 3G network according to the PLMN information, further the cell residence with the cell number cf76 on the 1900 frequency point is obtained, and finally a position registration process is initiated to report the position of the mobile phone to the mobile network, thereby realizing the successful access.

In the embodiment of the invention, because the first user identification card and the second user identification card belong to the same network operator, when the second user identification card can successfully register the network and the network searching of the first user identification card is refused, the first user identification card can adopt the second identification card to successfully register the PLMN and the frequency point information of the network for re-network searching. The network searching mode realizes the successful network searching of the first user identification card.

Referring to fig. 3, a flowchart of an international roaming network searching method according to another embodiment of the present invention is shown, which can be applied to the application scenario shown in fig. 1. The method comprises the following steps:

step 200: and judging whether the terminal is in the international roaming state.

In one possible embodiment, since PLMN = MCC + MNC, the MCC may uniquely identify the country to which the mobile client belongs. Therefore, when the MCC in the PLMN of the mobile terminal SIM card is not consistent with the MCC in the PLMN of the network where the MCC is currently located, it can be determined that the mobile terminal is in the international roaming state.

Specifically, a Broadcast Transmitter (BT) transmits broadcast signals to mobile terminals operating within the system. When the mobile terminal powers up in the international roaming country, it will scan all RF channels in the UTRAN bandwidth according to the gsm NAS layer. And searching the cell with the strongest signal at each carrier frequency, acquiring the broadcast message of the cell, and acquiring the message of the PLMN from the MIB. And after acquiring the PLMN information of the roaming country, comparing the PLMN information with the HPLMN in the EFIMSI file of the subscriber identity card, and if the MCC information of the PLMN information and the MCC information of the EFIMSI file are inconsistent, judging that the mobile terminal is in an international roaming state. Illustratively, when the user arrives in thailand, the PHY layer of the mobile terminal receives a broadcast message, where mib (master information block) of the broadcast message includes a local PLMN message, and after receiving the broadcast message, the PHY layer reports the message to the RRC layer, and the RRC layer parses an MCC (MCC of the thailand area, 52001/52018/52099) of the PLMN information center according to a protocol. And the home HPLMN stored in the mobile terminal SIM card contains 46000/46002/46007. The MCC code is 520, which indicates that the mobile terminal is in the international roaming state.

In another possible implementation manner, the mobile terminal determines whether the mobile terminal is in the foreign roaming state according to the current geographic location, specifically, as shown in fig. 1B, the mobile terminal obtains the current geographic location information through a GPS, and compares the current geographic location information with the home geographic location information stored in the mobile terminal device to determine whether the mobile terminal is in the foreign roaming state.

Step 204: and judging whether the PLMN of the visited operator network rejecting the first subscriber identity card is consistent with the PLMN of the successfully registered network of the second subscriber identity card.

If yes, go to step 206;

if not, go to step 205.

Step 206: and judging whether the first user identification card FPLMN has the PLMN of the second user identification card successfully registered with the network.

If the first user identification card FPLMN has the PLMN successfully registered by the second user identification card, the first user identification card can not search the network by using the PLMN, the access frequency point and the cell ID information of the network successfully registered by the second user identification card. Therefore, it is necessary to determine whether the PLMN where the second subscriber identity card successfully registers with the network exists in the first subscriber identity card FPLMN. Specifically, the PLMN (i.e., VPLMN) of the network successfully registered by the second subscriber identity card in the specified location of the mobile terminal, such as the EFIMSI file, is read, and compared with the content in the FPLMN list of the first subscriber identity card stored in the specified location, and if the VPLMN exists in the FPLMN of the first subscriber identity card, step 207 is executed.

Step 207: and deleting the PLMN of the second user identification card successfully registered with the network from the FPLMN, and deleting the network type rejected by the visited operator network from the first user identification card.

Specifically, the PLMN where the second subscriber identity card successfully registers with the network is deleted from the FPLMN, so that the first subscriber identity card can access the 3G or 2G network corresponding to the PLMN. For the first user identification card used for the identification card, because the first user identification card has the 4G network capability, when the card is accessed to a 3G or 2G network, if a 4G network in a neighboring area is found, the 4G network is continuously tried to be accessed according to the existing access criteria, and if the 4G access is not shielded, the mobile terminal continuously searches for the 4G network, so that the network is unavailable, and therefore, the network type rejected by the visited operator network of the first user identification card needs to be deleted.

After the step is executed, step 205 is further executed to search for a new network by the first subscriber identity card according to the PLMN, the access frequency point, and the cell ID information of the second subscriber identity card registered network.

In the embodiment of the invention, because the first user identification card and the second user identification card belong to the same network operator, when the second user identification card can successfully register the network and the network searching of the first user identification card is rejected, the PLMN, the access frequency point and the cell ID information of the network registered by the second user identification card are obtained, whether the PLMN of the network registered by the second user identification card exists in the FPLMN of the first user identification card is further judged, if the PLMN exists, the PLMN is deleted, the network system rejected by the network of the operator where the first user identification card is visited is deleted, and then the first user identification card can successfully register the PLMN, the frequency point information and the cell ID of the network by the second identification card to search again. The network searching method realizes the successful network searching of the first user identification card, and improves the network searching success rate of the dual-card mobile terminal in the international roaming state.

Fig. 4A is a block diagram of an international roaming network searching apparatus according to an embodiment of the present invention, referring to fig. 4A, where the network searching apparatus may be implemented by software, hardware, or a combination of the two. The device includes:

a first determining module 401, configured to determine whether a second subscriber identity card successfully registers in a network when the first subscriber identity card is rejected from searching for a visited operator network;

a second determining module 402, configured to determine whether the first subscriber identity card and the second subscriber identity card belong to the same network operator when the first subscriber identity card is rejected from searching for a visited operator network and the second subscriber identity card successfully registers in the network;

an obtaining module 403, configured to obtain PLMN, access frequency point, and cell ID information of the second subscriber identity card registration network;

and a network searching module 405, configured to search for a network again by the first subscriber identity card according to the PLMN, the access frequency point, and the cell ID information of the second subscriber identity card registered network.

Optionally, the second determining module is configured to: judging whether the IMSI information of the first subscriber identity card is consistent with the IMSI information of the second subscriber identity card;

and if so, judging that the first subscriber identity card and the second subscriber identity card belong to the same network operator.

Optionally, referring to fig. 4B, the apparatus further includes:

a roaming determining module 400, configured to determine whether the mobile terminal is in an international roaming state.

In the embodiment of the invention, because the first user identification card and the second user identification card belong to the same network operator, when the second user identification card can successfully register the network and the network searching of the first user identification card is refused, the first user identification card can adopt the second identification card to successfully register the PLMN, the access frequency point and the cell ID information of the network for network searching again. The network searching method realizes the successful network searching of the first user identification card, and improves the success rate of network searching of the dual-card mobile terminal in the international roaming state.

Fig. 5A is a block diagram of another international roaming network searching apparatus according to an embodiment of the present invention, referring to fig. 5A, where the network searching apparatus may be implemented by software, hardware, or a combination of the two. The device includes:

a third determining module 404, configured to determine whether a PLMN of the visited operator network that rejects the first subscriber identity card is consistent with a PLMN of a network successfully registered by the second subscriber identity card;

Optionally, referring to fig. 5B, the network searching module 405 includes:

a determining unit 4051, configured to determine whether the PLMN where the second subscriber identity card successfully registers with the network exists in the first subscriber identity card FPLMN;

a deleting unit 4052, configured to delete, when a PLMN where the second subscriber identity card successfully registers the network exists in the FPLMN of the first subscriber identity card, the PLMN where the second subscriber identity card successfully registers the network from the FPLMN, and delete a network type rejected by the visited operator network in the first subscriber identity card;

the network searching unit 4053 is configured to perform network searching again by the first subscriber identity card according to the PLMN, the access frequency point, and the cell ID information of the second subscriber identity card registered network.

In the embodiment of the invention, because the first user identification card and the second user identification card belong to the same network operator, when the second user identification card can successfully register the network and the network searching of the first user identification card is refused, the PLMN, the access frequency point and the cell ID information of the network registered by the second user identification card are obtained, whether the PLMN of the network registered by the second user identification card exists in the FPLMN of the first user identification card or not is further judged, if yes, the PLMN is deleted, the network system of the network searched by the first user identification card and visited is deleted, and then the first user identification card can successfully register the PLMN, the access frequency point and the cell ID information of the network by adopting the second identification card to search again. The successful network searching of the first subscriber identity module card is realized, and the success rate of network searching of the dual-card mobile terminal in the international roaming state is improved.

It should be noted that: in the roaming network searching apparatus provided in the foregoing embodiment, when performing network searching, only the division of the functional modules is illustrated, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the information display device and the information display method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments in detail and are not described herein again.

Fig. 6A is a block diagram illustrating an apparatus 600 according to an example embodiment, where the apparatus 600 may be an embodiment of a mobile terminal. Referring to fig. 6, apparatus 600 may include one or more of the following components: communication component 610, processing component 620, memory 630, power component 640, multimedia component 650, audio component 660, input/output (I/O) interface 670, sensor component 680.

The communication component 610 is configured to facilitate wired or wireless communication between the apparatus 600 and other devices. The apparatus 600 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. For example, as shown in fig. 6B, the communication component 610 may include at least one of a broadcast receiving module 611, a mobile communication module 612, a wireless internet module 613, a short message communication module 614, and a location information module 615.

The broadcast receiving module 611 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel. The broadcast channel may include a satellite channel and/or a terrestrial channel. The broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast-related information or a server that receives a previously generated broadcast signal and/or broadcast-related message and transmits it to a terminal. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. Also, the broadcast signal may further include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. The broadcast associated information may be provided via a mobile communication network, and in this case, the broadcast associated message may be received by the mobile communication module 612. The broadcast receiving module may receive a signal broadcast by using various types of broadcast receiving systems. In particular, the broadcast receiving module 611 can receive digital broadcasts by using broadcasting systems such as multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcasting-handheld (DVB-H), and the like. The broadcast receiving module 611 may be constructed to be suitable for various broadcasting systems providing broadcast signals. The broadcast signal and/or broadcast associated information received via the broadcast receiving module 611 is stored in the memory 160 (or other type of storage medium).

The mobile communication module 612 transmits and/or receives radio signals to and/or from at least one of a base station (e.g., access point, node B, etc.), an external signal terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted according to text and/or multimedia messages.

The wireless internet module 613 may support wireless internet access of the mobile terminal. The wireless internet technology upgraded by the module can comprise WLAN, Wimax, HSDPA and the like.

The short-range communication module 614 is used for supporting short-range communication modules, such as bluetooth (TM), radio frequency identification (rfid), infrared data, and the like.

The processing component 620 generally controls overall operation of the device 600, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing components 620 may include one or more processors 620 to execute instructions to perform all or a portion of the steps of the methods described above. Further, processing component 620 may include one or more modules that facilitate interaction between processing component 620 and other components. For example, the processing component 602 may include a multimedia module to facilitate interaction between the multimedia component 650 and the processing component 620.

The memory 630 is configured to store various types of data to support operations at the apparatus 600. Examples of such data include instructions for any application or method operating on device 600, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 504 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power supply component 640 provides power to the various components of the device 600. The power components 640 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 600.

The multimedia component 650 includes a screen providing an output interface between the device 600 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 650 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 600 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

Audio component 660 is configured to output and/or input audio signals. For example, audio component 660 includes a Microphone (MIC) configured to receive external audio signals when apparatus 600 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 630 or transmitted via the communication component 610. In some embodiments, audio component 660 further comprises a speaker for outputting audio signals.

I/O interface 670 provides an interface between processing component 620 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 680 includes one or more sensors for providing various aspects of state assessment for the device 600. For example, sensor assembly 680 may detect an open/closed state of device 600, the relative positioning of components, such as a display and keypad of device 600, sensor assembly 680 may also detect a change in position of device 600 or a component of device 600, the presence or absence of user contact with device 600, orientation or acceleration/deceleration of device 600, and a change in temperature of device 600. Sensor assembly 680 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 680 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 680 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

In the above embodiments, the implementation may be wholly or partly realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with embodiments of the invention, to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., Digital Versatile Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A network searching method for international roaming is applied to a dual-card mobile terminal with a primary card and a secondary card, and is characterized in that the method comprises the following steps:

2. The method of claim 1, wherein after obtaining the PLMN, access frequency point, and cell ID information of the secondary card registration network, the method further comprises:

3. The method of any of claims 1 to 2, wherein determining whether the secondary card successfully registers with the network when the primary card search for the visited operator network is denied further comprises:

4. The method of any of claims 1 to 2, wherein said determining whether the primary card and the secondary card belong to the same network operator comprises:

5. An international roaming network searching device applied to a dual-card mobile terminal with a primary card and a secondary card, the device comprising:

a third judging module, configured to judge whether a PLMN of the visited operator network that rejects the primary card is consistent with a PLMN of a network successfully registered by the secondary card;

network searching module for

6. The apparatus of claim 5, wherein the apparatus further comprises:

7. The apparatus of claim 5, wherein the second determination module is to: