CN105792319A - Access mode switching method and related equipment for a multi-mode dual-card terminal - Google Patents

Abstract

The invention discloses an access mode switching method of a multimode double-card terminal and a related device. The access mode switching method comprises the steps of if a fact that a main card cannot be used normally, a secondary card is in an available state and the secondary card support at least one other access mode except for an access mode supported by a secondary path is determined, indicating a main path to carry out network search of a set access mode according to a pre-stored PLMN (Public Land Mobile Network) frequency point list of an operator network related to the secondary card; and when determining that an available set access mode cell is searched, indicating a main path to access to a network corresponding to the searched set access mode cell, wherein the set access mode indicates an access mode which is supported by the secondary card rather than a secondary path, that is to say, a user can use one or multiple wireless access technologies supported by the secondary card to carry out corresponding service transmission through the main path and is no longer limited by the access mode supported by the secondary path. Therefore, the practical access capability of the secondary card is extended, and the flexibility of the terminal use mode is improved.

Description

Access mode switching method and related equipment for a multi-mode dual-card terminal

technical field

The invention relates to the technical field of mobile communication, in particular to a method for switching access modes of a multi-mode dual-card terminal and related equipment.

Background technique

LTE (Long Term Evolution, long-term evolution) is the follow-up evolution technology of 3G (3rd Generation, third-generation mobile communication). With its unique technical advantages such as high data rate, low delay, optimized network architecture, and larger carrier bandwidth, it has become a International mainstream new generation broadband mobile communication standard. In the early stage of LTE development, the LTE network could not achieve full coverage. At the same time, because the LTE network is based on the all-IP (Internet Protocol, network protocol) architecture, it can only provide VoIP (Voice over Internet Protocol, that is, voice transmission based on IP protocol) services based on the packet domain. Therefore, LTE terminals generally adopt a multi-mode form, and need to use 3G and 2G networks to carry corresponding services. At the same time, in the current mobile communication market, more and more users have multiple USIMs (Universal Subscriber Identity Modules, Universal Subscriber Identity Modules) ) card and/or SIM card (Subscriber Identity Module, Subscriber Identity Card) to meet different usage requirements, so the LTE multi-mode dual-card terminal has become one of the main terminal types in the mobile communication market.

Specifically, the LTE multi-mode dual-card terminal needs to be provided with two card slots, each of which can support the insertion of a USIM card or a SIM card, and can support multiple same or different wireless access technologies on standby at the same time and can Support multiple same or different wireless access technologies to communicate simultaneously or time-sharingly. Specifically, the wireless access technologies (also referred to as access modes or access standards) supported by LTE multi-mode dual-card terminals may include TD-LTE (TimeDivisionLongTermEvolution, Time Division Long Term Evolution)/LTEFDD (Frequency Division Duplex Long Term Evolution) /WCDMA (HSPA) (WCDMA, WidebandCodeDivisionMultipleAccess, Wideband Code Division Multiple Access; HSPA, HighSpeedUplinkPacketAccess, high-speed uplink packet access technology)/TD-SCDMA (TD-HSPA) (TD-SCDMA, TimeDivision-SynchronousCodeDivisionMultipleAccess, Time Division Synchronous Code Division Multiple Access)/GSM (GPRS/EDGE) (GSM, Global System for Mobile communications, Global System for Mobile Communications; GPRS, General Packet Radio Service, General Packet Radio Service; EDGE, EnhancedDataRateforGSMEvolution, Enhanced Data Rate GSM Evolution Technology) ; The two user cards (USIM card and/or SIM card) used can belong to the same operator, or can belong to different domestic or foreign operators, and the two user cards used can respectively support one or more access technology. In addition, in the actual network, the specific network type that the LTE multi-mode dual-card terminal can access is usually determined by the terminal capability, the wireless access technology supported by the USIM card and/or SIM card, the local network operation situation and operation strategy, etc. Decide.

At present, in the mobile communication market, the most common LTE multi-mode dual-card terminal distinguishes the main channel and the secondary channel according to user needs, terminal hardware implementation, cost, and operator customization strategies. The two user cards are divided into primary card and secondary card (or card 1, card 2, etc.) to distinguish the access capabilities and business functions of the two cards. The main channel of this multi-mode dual-card terminal usually includes necessary components such as 4G/3G/2G baseband chip (ie, the multi-mode processing module of the main channel), radio frequency chip and radio frequency front end, and the supported wireless access technology may include TD -LTE/LTEFDD/WCDMA(HSPA)/TD-SCDMA(TD-HSPA)/GSM(GPRS/EDGE); the sub-channel usually only includes 2G baseband chip (or 3G/2G baseband chip) (that is, the multi-mode processing of the sub-channel module), radio frequency chip and radio frequency front-end and other necessary devices, which can support one or two access technologies with smaller bandwidth (such as GSM or WCDMA/GSM). In addition, the setting of the main card and secondary card of this multi-mode dual-card terminal can be automatically adapted by the multi-mode dual-card terminal according to the user card type, the operator it belongs to, the current geographical location and other information, or through a fixed The corresponding relationship between the card slot and the main card and the auxiliary card is realized.

Furthermore, for this kind of common LTE multi-mode dual-card terminal, it usually supports the main card to access the main channel and use multiple access technologies to realize business communication, and the secondary card accesses the network through the secondary channel to realize the most basic communication functions , such as standby in 2G network or standby in 3G/2G network. Moreover, according to the implementation of the terminal, the main channel of this common LTE multi-mode dual-card terminal can adopt a single-standby mode or a multi-mode dual-standby mode. Among them, the single-standby mode adopted can be CSFB (CircuitSwitchFallBack, circuit domain fallback), that is, the main card preferentially resides in the LTE (such as TD-LTE/LTEFDD) network, and when there is a demand for voice services, the network will redirect or switch Mechanisms, etc. will drop the terminal back to the 3G (such as TD-SCDMA/WCDMA) or 2G (such as GSM) network to provide voice services. After the voice service is over, the terminal can return to the LTE network from the 3G or 2G network based on various mechanisms. In addition, the adopted multi-mode dual-standby mode may mean that the main card can be on standby and work on both LTE and 3G/2G networks at the same time, or be on standby and work on both LTE/3G and 2G networks at the same time.

Specifically, in the prior art, if a user card of a multi-mode dual-card terminal has poor signal quality or the traffic reaches a preset threshold and restricts its use, it can be switched to another user card for corresponding services. transmission. However, for the above-mentioned common multi-mode dual-card terminals, since its secondary channel is usually only designed to meet basic communication needs and supports access methods with a small bandwidth, it can only access the network through 2G or 3G/2G. Therefore, when the signal quality of the main card is poor or traffic, tariffs, etc. limit the use, even if the secondary card can support multiple access methods (such as 4G/3G/2G), due to the limitation of the terminal, the user can only use The 2G or 3G/2G access network of the secondary card leads to low transmission rate and poor flexibility of use, which seriously affects the user experience.

In addition, when the signal quality of the main card is poor or traffic, tariffs and other conditions limit the use, if the 2G network signal of the secondary card is weak or there is no GSM network signal in the local area, the multi-mode dual-card terminal that can only use 2G for the secondary channel will not be able to Using it will further reduce the use flexibility of the terminal and further reduce the user experience.

Contents of the invention

The embodiment of the present invention provides a multi-mode dual-card terminal access mode switching method and related equipment to solve the problem that the existing secondary channel only supports the use of multi-mode dual-card terminals that access the network through 2G or 3G/2G Problems such as poor flexibility.

An embodiment of the present invention provides a method for switching access modes of a multi-mode dual-card terminal, including:

If it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and it is determined that the secondary card of the multi-mode dual-card terminal is in an available state and the secondary card supports interfaces other than those supported by the secondary channel of the multi-mode dual-card terminal If there is at least one access mode other than the access mode, it indicates that the main path of the multi-mode dual-card terminal is based on the secondary card or the operator associated with the secondary card stored in advance by the multi-mode dual-card terminal. The PLMN (PublicLandMobileNetwork, Public Land Mobile Network) frequency point list of the network performs a network search for setting the access mode; the setting access mode refers to the access mode that the secondary channel does not support but the secondary card supports;

If it is determined that the main channel searches for an available set access mode cell, instruct the main channel to access the network corresponding to the searched set access mode cell.

Further, after it is determined that the main channel has searched for an available set access mode cell, the method further includes:

Informing the terminal user corresponding to the multi-mode dual-card terminal of the information that the available set access mode cell has been searched, and receiving feedback from the terminal user whether to allow the use of the secondary card to access the searched set access mode Indication information in the network corresponding to the cell;

Instructing the main channel to access the network corresponding to the searched set access mode cell, including:

If receiving the indication information fed back by the terminal user to allow the use of the secondary card to access the network corresponding to the searched set access mode cell, instruct the main channel to access the searched set access mode In the network corresponding to the cell.

Further, after instructing the main channel to access the network corresponding to the searched set access mode cell, the method further includes:

The secondary channel is instructed to detach from the network on which it resides.

Further, after instructing the main channel to search for the set access mode network according to the PLMN frequency point list of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal , the method also includes:

If it is determined that the main channel does not search for an available set access mode cell, then instruct the main channel to follow a preset period, and the main card, the secondary card or the multi-mode dual-card terminal The stored PLMN frequency point list of the operator network is used for network search, wherein the PLMN frequency point of the operator network pre-stored in accordance with the main channel according to the main card, the secondary card or the multi-mode dual-card terminal is indicated When performing a network search on the list, the search priority of the PLMN frequency point list of the operator network related to the main card is higher than the search priority of the PLMN frequency point list of the operator network related to the secondary card; and

When it is determined that the main channel has searched for an available main card cell, and it is determined that the main card cannot be used normally because the signal quality is lower than the preset threshold, instruct the main channel to access the available main card cell In the network; or, when it is determined that the main channel does not search for an available main card cell, but searches for an available set access mode cell, instruct the main channel to access the searched set access mode In the network corresponding to the cell; or, when it is determined that the main channel has not searched for an available main card cell and has not found an available set access mode cell, instruct the main channel to continue to perform the above-mentioned card, the secondary card or the multi-mode dual-card terminal pre-stored PLMN frequency point list of the operator network to perform a network search operation.

Further, after instructing the main channel to access the network corresponding to the searched set access mode cell, the method further includes:

If it is determined that the main card has recovered the usable state, instruct the main card to re-reside in the corresponding main channel access network, and instruct the secondary card to fall back to the corresponding secondary channel access network.

Further, if it is determined that the main card has returned to an available state, instruct the main card to re-reside in the corresponding main channel access network, and at the same time instruct the secondary card to fall back to the corresponding secondary channel access network, including :

If it is determined that the secondary path is in an idle state, then instruct the secondary path according to the PLMN frequency point list of the operator network related to the primary card stored in advance by the primary card or the multi-mode dual-card terminal, according to the specified Search the network for the access modes supported by the secondary channel;

If it is determined that the secondary channel has searched for an available primary card cell, instruct the secondary channel to camp in the corresponding primary card cell and obtain the neighbor cell information of the primary card cell where it resides; and,

Instructing the main channel to perform a network search according to the set network priority according to the neighbor cell information obtained by the secondary channel when the service processing volume is lower than the set threshold or in the non-paging cycle; and

When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available main card cell found by the main channel in the corresponding network; and,

After determining that the main channel has successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to detach from the network where the main card resides, and reside to the available cell corresponding to the access mode supported by the secondary channel.

Further, if it is determined that the main card has returned to an available state, instruct the main card to re-reside in the corresponding main channel access network, and at the same time instruct the secondary card to fall back to the corresponding secondary channel access network, including :

Instructing the main channel when the business processing volume is lower than the set threshold or in the non-paging cycle, according to the PLMN of the operator network related to the main card stored in advance by the main card or the multi-mode dual-card terminal A frequency point list, performing a network search according to the access mode supported by the main channel and the set network priority;

When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available main card cell found by the main channel in the corresponding network; and,

After it is determined that the main channel is successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to pre-store according to the secondary card or the multi-mode dual-card terminal The PLMN frequency point of the operator network related to the secondary card, conducts a network search and resides in an available cell corresponding to the access mode supported by the secondary channel.

Further, if it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and it is determined that the secondary card of the multi-mode dual-card terminal is in an available state and the secondary card supports all channels except the secondary channel of the multi-mode dual-card terminal other than at least one access mode other than the supported access mode, the method further includes:

Upgrade or adapt the original secondary card to the current main card, downgrade or adapt the original main card to the current secondary card;

After determining that the original main card has recovered a usable state, the method further includes:

The current secondary card is upgraded or adapted to be a primary card, and the current primary card is downgraded or adapted to be a secondary card.

Further, if it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, then instructing the main path of the multi-mode dual-card terminal to match the secondary card or the pre-stored information of the multi-mode dual-card terminal Before the PLMN frequency point list of the card-related operator network performs a network search for setting the access mode, the method also includes:

It is determined that the duration during which the main card of the multi-mode dual-card terminal cannot be used normally is greater than a preset duration threshold.

Correspondingly, an embodiment of the present invention also provides an access mode switching device for a multi-mode dual-card terminal, including:

A determination module, configured to determine whether the multi-mode dual-card terminal meets the following conditions: the main card of the multi-mode dual-card terminal cannot be used normally, and the secondary card of the multi-mode dual-card terminal is available and the secondary card supports At least one access mode other than the access mode supported by the secondary channel of the multi-mode dual-card terminal;

The control module is used to determine in the determination module that the main card of the multi-mode dual-card terminal cannot be used normally, and determine that the secondary card of the multi-mode dual-card terminal is available and that the secondary card supports When using at least one access mode other than the access mode supported by the secondary channel of the dual-card terminal, instruct the main channel of the multi-mode dual-card terminal to follow the secondary card or the multi-mode dual-card terminal in advance. The stored PLMN frequency point list of the operator network related to the secondary card performs a network search for setting the access mode; the setting access mode refers to an access that is not supported by the secondary channel but supported by the secondary card. enter mode;

The determination module is also used for instructing the main channel in the control module to proceed according to the PLMN frequency point list of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal After the network search of the set access mode, determine whether the main channel has searched for an available set access mode cell;

The control module is further configured to instruct the main channel to access the cell corresponding to the searched configured access mode cell when the determining module determines that the main channel has searched for an available configured access mode cell. in the network.

Further, the access mode switching device further includes a sending module and a receiving module:

The sending module is configured to notify the terminal corresponding to the multi-mode dual-card terminal of the information that the available configured access mode cell has been searched for after determining that the main channel has searched for an available configured access mode cell user;

The receiving module is configured to receive indication information fed back by the terminal user whether to allow the use of the secondary card to access the network corresponding to the searched set access mode cell;

The control module is specifically configured to, when the receiving module receives the indication information fed back by the terminal user that the secondary card is allowed to access the network corresponding to the searched set access mode cell, instruct the primary Access to the network corresponding to the searched set access mode cell.

Further, the control module is further configured to instruct the secondary channel to detach from the network where it resides after instructing the primary channel to access the network corresponding to the searched cell with the set access mode.

Further, the control module is also used to set the main channel according to the PLMN frequency point list of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal. After the network search of the fixed access mode, if according to the determination result of the determination module, it is determined that the main channel does not search for an available set access mode cell, then instruct the main channel to follow a preset cycle, and The main card, the secondary card, or the PLMN frequency point list of the operator network pre-stored by the multi-mode dual-card terminal performs a network search, wherein, when instructing the main channel, according to the main card, the secondary card Or when the PLMN frequency point list of the operator network pre-stored by the multi-mode dual-card terminal performs a network search, the search priority of the PLMN frequency point list of the operator network related to the main card is higher than that associated with the secondary card. The search priority of the PLMN frequency point list of the relevant operator network; and,

According to the determination result of the determination module, when it is determined that the main channel has searched for an available main card cell, and it is determined that the reason why the main card cannot be used normally before is that the signal quality is lower than a preset threshold, instruct the main channel Access to the network corresponding to the available main card cell; or, according to the determination result of the determination module, it is determined that the main channel does not search for an available main card cell, but searches for an available set access mode cell , indicating that the main channel is connected to the network corresponding to the searched set access mode cell; or, according to the determination result of the determination module, it is determined that the main channel has not searched for an available main card cell , and no available set access mode cell is found, instruct the main channel to continue to perform the above-mentioned PLMN frequency based on the operator’s network pre-stored by the main card, the secondary card or the multi-mode dual-card terminal. Click the list to search the network;

The determining module is also used to instruct the main channel to perform a network search according to the PLMN frequency point list of the operator network pre-stored by the main card, the secondary card or the multi-mode dual-card terminal in the control module Afterwards, it is determined whether an available main card cell and/or a set access mode cell is found in the main channel.

Further, the access mode switching device also includes a state monitoring module:

The state monitoring module is used to monitor in real time whether the main card has returned to an available state;

The control module is further configured to determine that the main card has When the usable state is restored, the primary card is instructed to re-resident to the corresponding primary channel access network, and at the same time, the secondary card is instructed to fall back to the corresponding secondary channel access network.

Further, the control module is specifically configured to determine that the The main card has been restored to the usable state, if it is determined that the secondary channel is in an idle state, then instruct the secondary channel to use the operator network associated with the main card stored in advance by the main card or the multi-mode dual-card terminal The list of PLMN frequency points, and perform network search according to the access mode supported by the secondary channel; and

If it is determined that the secondary channel has searched for an available primary card cell, instruct the secondary channel to camp in the corresponding primary card cell and obtain the neighbor cell information of the primary card cell where it resides; and,

Instructing the main channel to perform a network search according to the set network priority according to the neighbor cell information obtained by the secondary channel when the service processing volume is lower than the set threshold or in the non-paging cycle; and

When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available main card cell found by the main channel in the corresponding network; and,

After determining that the main channel has successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to detach from the network where the main card resides, and reside to the available cell corresponding to the access mode supported by the secondary channel.

Further, the control module is specifically configured to determine that the If the main card has recovered the usable state, it indicates that the main channel, when the business processing volume is lower than the set threshold or in the non-paging cycle, according to the pre-stored information of the main card or the multi-mode dual-card terminal and the main channel The PLMN frequency point list of the card-related operator network, according to the access mode supported by the main channel and the set network priority, perform a network search; and

When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available main card cell found by the main channel in the corresponding network; and,

After it is determined that the main channel is successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to pre-store according to the secondary card or the multi-mode dual-card terminal The PLMN frequency point of the operator network related to the secondary card, conducts a network search and resides in an available cell corresponding to the access mode supported by the secondary channel.

Further, the control module is further configured to determine that the main card of the multi-mode dual-card terminal cannot be used normally according to the determination result of the determination module, and determine that the secondary card of the multi-mode dual-card terminal is available and The secondary card supports at least one access mode other than the access mode supported by the secondary channel of the multi-mode dual-card terminal, then the original secondary card is upgraded or adapted to the current main card, and the original main card Downgrade or adapt to the current secondary card; or,

After it is determined that the original main card has returned to a usable state, the current secondary card is upgraded or adapted to be a main card, and the current main card is downgraded or adapted to be a secondary card.

Further, the control module is also used to determine that the main card of the multi-mode dual-card terminal cannot be used normally according to the determination result of the determination module, then instruct the main channel of the multi-mode dual-card terminal to follow the above-mentioned The secondary card or the PLMN frequency point list of the operator network related to the secondary card stored in advance by the multi-mode dual-card terminal determines the main card of the multi-mode dual-card terminal before performing a network search for setting the access mode The duration of unavailable normal use is greater than the preset duration threshold.

Furthermore, the embodiment of the present invention also provides a multi-mode dual-card terminal, the multi-mode dual-card terminal includes the access mode switching device described in the embodiment of the present invention.

The beneficial effects of the present invention are as follows:

Embodiments of the present invention provide a method for switching access modes of a multi-mode dual-card terminal and related equipment. If it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and it is determined that the secondary card of the multi-mode dual-card terminal is in an available state And the secondary card supports at least one access mode other than the access mode supported by the secondary channel, it can instruct the main channel of the multi-mode dual-card terminal to follow the pre-stored PLMN frequency of the operator's network related to the secondary card. The point list is used to search the network of the set access mode, and when it is determined that an available set access mode cell is found, the main channel is instructed to access the network corresponding to the searched set access mode cell, so that The secondary card can be connected to a corresponding set access mode network through the main channel, wherein the set access mode refers to an access mode that is not supported by the secondary channel but supported by the secondary card. That is to say, in the technical solution described in the embodiment of the present invention, the user can use one or more wireless access technologies supported by the secondary card to transmit corresponding services through the main channel, and is no longer supported by the secondary card. In this way, the actual access capability of the secondary card can be expanded without modifying the hardware structure of the existing multi-mode dual-card terminal, and the flexibility of terminal usage can be improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic flow diagram of an access mode switching method for a multi-mode dual-card terminal described in Embodiment 1 of the present invention;

Figure 2 shows the flow of when the main card has been restored to the usable state in Embodiment 1 of the present invention, the main card re-residents to the corresponding main channel access network, and at the same time the secondary card falls back to the corresponding secondary channel access network Diagram 1;

Figure 3 shows the flow of when the main card has been restored to the usable state in Embodiment 1 of the present invention, the main card re-residents to the corresponding main channel access network, and at the same time the secondary card falls back to the corresponding secondary channel access network Diagram 2;

FIG. 4 is a schematic diagram of state switching of the multi-mode dual-card terminal described in Embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of an access mode switching device for a multi-mode dual-card terminal described in Embodiment 2 of the present invention;

FIG. 6 is a schematic structural diagram of the multi-mode dual-card terminal described in Embodiment 2 of the present invention.

detailed description

Aiming at the problems existing in the prior art, this application proposes a multi-mode dual-card terminal access mode switching scheme based on a multi-mode dual-card terminal whose secondary channel can only access the network through 2G or 3G/2G. The following objectives can be achieved without modifying the hardware structure of the existing multi-mode dual-card terminal:

When the signal quality of the main card is poor or cannot be used normally due to problems such as tariffs and traffic, the secondary card is available and the secondary card can support one or more access modes other than those supported by the secondary channel. In some cases, expand the access capability of the secondary card, so that the secondary card is no longer limited by the access mode supported by the secondary channel, and can use other access technologies supported by the secondary card itself to carry services, thus greatly expanding the secondary card The actual access capability improves the flexibility of terminal usage.

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one:

Embodiment 1 of the present invention provides a method for switching access modes of a multi-mode dual-card terminal, as shown in FIG. 1 , which is the flow of the method for switching access modes of a multi-mode dual-card terminal described in Embodiment 1 of the present invention. Schematically, the method may include the following steps:

Step 101: If it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and it is determined that the secondary card of the multi-mode dual-card terminal is available and the secondary card supports all channels except the secondary channel of the multi-mode dual-card terminal At least one access mode other than the supported access mode indicates that the main path of the multi-mode dual-card terminal is related to the secondary card according to the secondary card or the multi-mode dual-card terminal pre-stored The PLMN frequency point list of the operator's network is used to search the network for setting the access mode, wherein the set access mode refers to an access mode that is not supported by the secondary channel but supported by the secondary card.

Specifically, if it is determined that the main card of the multi-mode dual-card terminal has a signal quality lower than a preset threshold (or even no signal coverage) due to coverage problems, or problems such as tariffs and traffic restrictions, the said The main card of the multi-mode dual-card terminal cannot be used normally.

Further, in order to reduce the number of network searches performed by the main path of the multi-mode dual-card terminal, after determining that the main card of the multi-mode dual-card terminal cannot be used normally, and after instructing the main path of the multi-mode dual-card terminal to follow Before the secondary card or the PLMN frequency point list of the operator network related to the secondary card stored in advance by the multi-mode dual-card terminal performs a network search for setting the access mode, the method may further include:

It is determined that the duration during which the main card of the multi-mode dual-card terminal cannot be used normally is greater than a preset duration threshold.

That is to say, preferably, when it is determined that the signal quality of the main card is lower than the preset threshold due to coverage problems, or cannot be used normally for a preset period of time due to problems such as tariffs and traffic, and it is determined that the secondary card is available state and the secondary card (or secondary card type) can support one or more wireless access technologies other than the secondary channel access capability, the multi-mode dual-card terminal will enter the corresponding access mode switching state to Expand the actual access capability of the secondary card.

It should be noted that, in the embodiment of the present invention, when expanding the actual access capability of the secondary card, in order to ensure or improve the data transmission efficiency, preferably, when the main card cannot be used normally, the actual access capability of the secondary card Access capability usually refers to switching the secondary card to a larger bandwidth access mode, that is, switching the secondary card to an access that is not supported by the secondary channel, but supported by the secondary card, and has a priority relative to that supported by the secondary channel. In terms of the priority that the mode has, it is higher in the access mode.

For example, assuming that the priorities of the access modes are 4G, 3G, and 2G from high to low, if the secondary channel supports 2G access and the secondary card supports 4G/3G/2G, the actual access capability of the expanded secondary card usually refers to It is to switch the secondary card to the 4G/3G access mode, that is, it can instruct the main path of the multi-mode dual-card terminal to follow the secondary card or the pre-stored information related to the secondary card of the multi-mode dual-card terminal. The PLMN frequency point list of the operator network searches for the corresponding 4G/3G available cells; if the secondary channel supports 2G access and the secondary card supports 3G/2G, expanding the actual access capability of the secondary card usually refers to switching the secondary card To 3G access mode, that is, the main channel of the multi-mode dual-card terminal can be instructed to follow the secondary card or the PLMN frequency point of the operator network related to the secondary card stored in advance by the multi-mode dual-card terminal Search the corresponding 3G available cells in the list; or, if the secondary channel supports 3G access and the secondary card supports 4G/3G/2G, extending the actual access capability of the secondary card usually refers to switching the secondary card to 4G access mode , that is, the main channel of the multi-mode dual-card terminal can be instructed to search for the corresponding 4G available area.

Of course, it needs to be explained that if the secondary channel supports 3G access and the secondary card supports 4G/3G/2G, when expanding the actual access capability of the secondary card, the secondary card can also be switched to 4G or 2G access mode, that is, The secondary card can be switched to any access mode that is not supported by the secondary channel but supported by the secondary card.

In addition, it should be noted that, in the embodiment of the present invention, when the main path of the multi-mode dual-card terminal performs the corresponding network search, usually the 4G/3G/2G baseband chip ( That is, the multi-mode processing module), which is not described in this embodiment of the present invention.

Step 102: If it is determined that the main channel searches for an available set access mode cell, instruct the main channel to access the network corresponding to the searched set access mode cell.

Specifically, if an available set access mode cell is found, the main channel can perform a corresponding attach procedure or perform a tracking area update (TAU, 4G network) or a routing area update or a location area update ( RAU, LAU, 3G network) and other operations, access to the corresponding network, so that the secondary card can access to the corresponding set access mode network through the main channel.

That is, in the technical solution described in the embodiment of the present invention, when it is determined that the main card cannot be used normally, and the secondary card is in an available state, and the secondary card supports at least one access mode other than the access mode supported by the secondary channel In the access mode, the user can use one or more wireless access technologies supported by the secondary card to transmit corresponding services through the main channel, and is no longer limited by the access mode supported by the secondary channel, thus expanding the scope of the secondary card The actual access capability improves the flexibility of terminal usage.

It should be noted that in practical applications, when the primary card cannot be used normally, which access mode or modes the actual access capability of the secondary card can be expanded to depends on the terminal implementation, network environment, and operator policies. side decision.

For example, if the main channel adopts a single-standby mode (such as CSFB), when the main card cannot be used normally, when the actual access capability of the secondary card is expanded according to the above method, the secondary card can , network environment and business requirements, etc. reside in any set access mode supported by the secondary card through the main channel; similarly, if the main channel adopts the multi-mode dual standby mode, when the main When in use, when the actual access capability of the secondary card is extended in the above manner, the secondary card can reside in any secondary card supported by the secondary card through the main channel according to the operator's customized There are two setting access modes.

Specifically, if the wireless access technology supported by the secondary card includes 4G (may include one or more of TD-LTE and LTE FDD), 3G (may include one or more of TD-SCDMA, WCDMA, CDMA2000 or Multiple), 2G (such as GSM), and the secondary channel only includes 2G modules (that is, only supports GSM), then, at this time, the actual access technology of the secondary card is only 2G. Correspondingly, when the main card cannot be used normally , when expanding the actual access capability of the secondary card according to the above method, if the main channel adopts a single standby mode (such as CSFB), the secondary card can reside in the 4G/3G /2G in one network; if the main channel adopts multi-mode dual-standby mode, the secondary card can reside in two 4G/3G/2G networks according to the operator's customized strategy, network environment and business requirements.

Of course, it should be noted that when there are multiple set access mode cells searched by the main channel, the access mode with a relatively higher priority can be preferentially selected according to the priority corresponding to each access mode. The cell performs access, which is not described in this embodiment of the present invention.

Further, in the embodiment of the present invention, after it is determined that the main channel has searched for an available set access mode cell, the method may further include:

Informing the terminal user corresponding to the multi-mode dual-card terminal of the information that the available set access mode cell has been searched, and receiving feedback from the terminal user whether to allow the use of the secondary card to access the searched set access mode Indication information in the network corresponding to the cell. Specifically, it may receive indication information fed back by the terminal user through menus or shortcuts, etc., whether to allow the use of the secondary card to access the network corresponding to the searched cell with the set access mode.

Correspondingly, instructing the main channel to access the network corresponding to the searched set access mode cell may include:

If receiving the indication information fed back by the terminal user to allow the use of the secondary card to access the network corresponding to the searched set access mode cell, instruct the main channel to access the searched set access mode In the network corresponding to the cell.

It should be noted that if the indication information fed back by the terminal user is not allowed to use the secondary card to access the network corresponding to the set access mode cell searched, there is no need to instruct the main channel to access the network. In the network corresponding to the searched cell with the set access mode, at this time, the secondary card will still use the secondary channel to maintain network access. This situation is more applicable to the situation that the priority of the searched set access mode is lower than the priority of the access mode supported by the secondary channel.

Further, in the embodiment of the present invention, after instructing the main channel to access the network corresponding to the searched cell with the set access mode, the method may further include:

The secondary channel is instructed to detach from the network on which it resides.

Further, in the embodiment of the present invention, when instructing the main channel to proceed according to the PLMN frequency point list of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal After setting the network search of the access mode, the method may further include:

If it is determined that the main channel does not search for an available set access mode cell, then instruct the main channel to follow a preset period, and the main card, the secondary card or the multi-mode dual-card terminal The stored PLMN frequency point list of the operator network is used for network search, wherein the PLMN frequency point of the operator network pre-stored in accordance with the main channel according to the main card, the secondary card or the multi-mode dual-card terminal is indicated When performing a network search on the list, the search priority of the PLMN frequency point list of the operator network related to the main card is higher than the search priority of the PLMN frequency point list of the operator network related to the secondary card; and

When it is determined that the main channel has searched for an available main card cell, and it is determined that the main card cannot be used normally because the signal quality is lower than the preset threshold, instruct the main channel to access the available main card cell In the network; or, when it is determined that the main channel does not search for an available main card cell, but searches for an available set access mode cell, instruct the main channel to access the searched set access mode In the network corresponding to the cell; or, when it is determined that the main channel has not searched for an available main card cell and has not found an available set access mode cell, instruct the main channel to continue to perform the above-mentioned card, the secondary card or the multi-mode dual-card terminal pre-stored PLMN frequency point list of the operator network to perform a network search operation.

That is to say, instructing the main channel to perform a network search for setting the access mode according to the PLMN frequency point list of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal Afterwards, if it is determined that the main channel does not search for an available set access mode cell, the multi-mode dual-card terminal can enter the corresponding network search state, instruct the main channel to follow a preset cycle, and the The main card, the secondary card or the PLMN frequency point list of the operator's network pre-stored by the multi-mode dual-card terminal is used for network search.

Specifically, the main channel can perform all the main card operations according to the corresponding instructions, first according to the main card or the PLMN frequency point list of the operator network related to the main card stored in advance by the multi-mode dual-card terminal. In the network search of the access mode, if no available cell corresponding to the primary card is found, it can continue to follow the PLMN frequency of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal. Click the list to perform a network search for setting the access mode.

Further, when the main channel searches for an available main card cell and the reason why the main card cannot be used normally before is that the signal quality is lower than a preset threshold (at this time, it can be determined that the main card has returned to an available state) , the main channel can access the network corresponding to the searched available main card cell according to the corresponding instruction, at this time, the multi-mode dual-card terminal can return to the normal use state; or, when the main card When the channel does not search for an available main card cell, but searches for an available secondary card set access mode cell, the main channel can access the searched set access mode cell corresponding to the searched set access mode cell according to the corresponding instructions. In the network, at this time, the multi-mode dual-card terminal can enter the corresponding access mode switching state; or, when the main channel does not search for an available primary card cell and does not search for an available secondary card set access When entering a mode cell, the multi-mode dual-card terminal can remain in the network search state. At this time, the main channel can continue to execute the above-mentioned information according to the main card, the secondary card or the multi-mode The PLMN frequency point list of the operator's network stored in advance by the dual-card terminal performs network search operations.

Further, it should be noted that, in the embodiment of the present invention, when instructing the main path, according to the information of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal After the PLMN frequency point list searches for the set access mode network, if it is determined that the main channel does not search for an available set access mode cell, when the multi-mode dual-card terminal is in the network search state, the The secondary card of the multi-mode dual-card terminal may still use the secondary path to maintain network access, which will not be described in this embodiment of the present invention.

Further, in the embodiment of the present invention, after instructing the main channel to access the network corresponding to the searched cell with the set access mode, the method may further include:

If it is determined that the main card has recovered the usable state, instruct the main card to re-reside in the corresponding main channel access network, and instruct the secondary card to fall back to the corresponding secondary channel access network.

That is to say, after the main channel is instructed to access the network corresponding to the searched set access mode cell (that is, when the multi-mode dual-card terminal is in the access mode switching state), if it is determined that the If the main card has recovered the usable state, it can enter the corresponding access mode fallback state, instruct the main card to re-resident to the corresponding main channel access network, and at the same time instruct the secondary card to fall back to the corresponding secondary channel access network. into the network.

Specifically, as shown in FIG. 2, after instructing the main channel to access the network corresponding to the searched set access mode cell, if it is determined that the main card has recovered the usable state, then instruct the main card to The card re-residents to the corresponding main channel access network, and at the same time instructs the secondary card to fall back to the corresponding secondary channel access network. The specific steps may be as follows:

Step 201: If it is determined that the secondary path is in an idle state, then instruct the secondary path (specifically, the 2G baseband chip or 2G/3G baseband chip of the secondary path) according to the main card or the multi-mode dual card The terminal pre-stores the PLMN frequency point list of the operator network related to the main card, and performs network search according to the access mode supported by the secondary channel.

Specifically, the secondary path may be searched in a periodic triggering manner or in a real-time manner.

Step 202: If it is determined that the secondary channel has found an available primary card cell, instruct the secondary channel to camp in the corresponding primary card cell and obtain the neighbor cell information of the primary card cell where it resides; otherwise, continue to execute Step 201.

Specifically, after the secondary channel resides in the corresponding primary card cell, it can obtain information such as cell frequency points and cell IDs of one or more access modes other than those supported by the secondary channel. One embodiment is that if the secondary channel only supports 2G access technology, after the secondary channel searches for and resides in a 2G cell that the main card can access, it can obtain the neighbors of the cell by reading the broadcast message of the cell. Area relationship (may include frequency point, cell ID and other information of one or more access modes of 4G/3G adjacent cells). Another embodiment is that if the secondary channel supports 3G/2G access technology, the secondary channel can search for the 3G/2G available cells of the main card according to the priority, read the broadcast message of the cell after successfully camping, and obtain the neighbors of the cell. Area relationship (may include frequency point, cell ID and other information of one or more access modes of 4G/3G adjacent cells).

Step 203: Instruct the main channel to, when the business processing volume is lower than the set threshold (such as when there is no business) or in the non-paging cycle, according to the adjacent cell information (such as the obtained cell frequency and other information obtained by the secondary channel) ), search the network according to the set network priority.

Specifically, the set network priority may be 4G greater than 3G greater than 2G.

Step 204: When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available primary card cell found by the main channel. In the network corresponding to the card cell.

Specifically, the main channel may reside in a network with a higher priority according to a set network priority.

Step 205: After determining that the main channel has successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to detach from the network where the main card resides, And reside in the available cell corresponding to the access mode supported by the secondary channel.

Further, as shown in FIG. 3 , after instructing the main channel to access the network corresponding to the searched set access mode cell, if it is determined that the main card has recovered the usable state, then instruct the main card The card re-residents to the corresponding main channel access network, and at the same time instructs the secondary card to fall back to the corresponding secondary channel access network. The specific steps may be as follows:

Step 301: Instruct the main channel to, according to the operator associated with the main card stored in advance by the main card or the multi-mode dual-card terminal, when the business processing volume is lower than the set threshold or in the non-paging cycle The PLMN frequency point list of the network is used for network search according to the access mode supported by the main channel and the set network priority.

Specifically, the network priority when performing a network search may be 4G greater than 3G greater than 2G.

Step 302: When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available primary card cell found by the main channel. Corresponding to the network corresponding to the card cell; correspondingly, when it is determined that no available primary card cell is found in the main channel, step 301 may continue to be executed.

Step 303: After determining that the main channel is successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to use the secondary card or the multi-mode dual card The terminal pre-stores the PLMN frequency point of the operator's network related to the secondary card, performs a network search and camps in an available cell corresponding to the access mode supported by the secondary channel.

That is to say, after the secondary card is switched to the main channel, the multi-mode dual-card terminal can monitor in real time whether the main card has returned to the available state, and when it is determined that the main card has returned to the available state, enter the access mode fallback state, Instruct the main card to re-resident to the corresponding main channel access network, and at the same time instruct the secondary card to fall back to the corresponding secondary channel access network, so that the multi-mode dual-card terminal can return to the corresponding normal use state.

Specifically, according to different applicable scenarios, the main card re-residents to the corresponding main channel access network, and the secondary card returns to the corresponding secondary channel access network at the same time. According to the access mode supported by the main card and the PLMN information of the local network, the terminal can automatically select the corresponding fallback solution. For example, in one embodiment, if the main card supports 4G/3G/2G access mode, and through the local PLMN information, it is found that there is no 2G network environment in the local area, and the secondary channel only supports 2G access, then the terminal must select the The fallback solution is not described in this embodiment of the present invention.

Further, it should be noted that, in the embodiment of the present invention, the multi-mode dual-card terminal can be in the normal use state, the access mode switching state, the network search state, the access mode fallback state, etc. according to the corresponding switching conditions. Corresponding switching is performed between states, and a specific schematic diagram of terminal state switching may be shown in FIG. 4 , which is not described in detail in this embodiment of the present invention.

Further, in the embodiment of the present invention, if it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and it is determined that the secondary card of the multi-mode dual-card terminal is available and the secondary card supports At least one access mode other than the access mode supported by the secondary channel of the multi-mode dual-card terminal, the method may also include:

Upgrade or adapt the original secondary card to the current main card, downgrade or adapt the original main card to the current secondary card.

Correspondingly, after it is determined that the original main card has recovered the usable state, the method may further include:

The current secondary card is upgraded or adapted to be a primary card, and the current primary card is downgraded or adapted to be a secondary card.

That is to say, if it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and it is determined that the secondary card of the multi-mode dual-card terminal is available and the secondary card supports the secondary channel except for the multi-mode dual-card terminal If there is at least one access mode other than the supported access mode, the relationship between the primary card and the secondary card can be reversed. Correspondingly, after it is determined that the original main card has returned to a usable state, the previously swapped main card and the secondary card may be swapped again, which will not be described in detail in this embodiment of the present invention.

Embodiment 1 of the present invention provides a method for switching access modes of a multi-mode dual-card terminal. If it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and the secondary card of the multi-mode dual-card terminal is If the card supports at least one access mode other than the access mode supported by the secondary channel, the main channel of the multi-mode dual-card terminal can be instructed to follow the pre-stored PLMN frequency point list of the operator network related to the secondary card Perform a network search for the set access mode, and when it is determined that an available set access mode cell is found, instruct the main channel to access the network corresponding to the searched set access mode cell, so that the The secondary card can access the corresponding set access mode network through the main channel, wherein the set access mode refers to an access mode that is not supported by the secondary channel but supported by the secondary card. That is to say, in the technical solution described in the embodiment of the present invention, the user can use one or more wireless access technologies supported by the secondary card to transmit corresponding services through the main channel, and is no longer supported by the secondary card. Therefore, without modifying the hardware structure of the existing multi-mode dual-card terminal, the actual access capability of the secondary card can be expanded, the flexibility of the terminal usage mode can be improved, and the user experience can be improved.

Embodiment two:

Based on the same inventive concept, Embodiment 2 of the present invention provides an access mode switching device for a multi-mode dual-card terminal, as shown in FIG. A schematic structural diagram of a mode switching device, the access mode switching device may specifically include:

The determination module 51 can be used to determine whether the multi-mode dual-card terminal meets the following conditions: the main card of the multi-mode dual-card terminal cannot be used normally, and the secondary card of the multi-mode dual-card terminal is available and the secondary card Support at least one access mode other than the access mode supported by the secondary channel of the multi-mode dual-card terminal; specifically, if it is determined that the main card of the multi-mode dual-card terminal has When the signal quality is lower than the preset threshold (even without signal coverage), or there are problems such as tariffs and traffic restrictions, it can be considered that the main card of the multi-mode dual-card terminal cannot be used normally.

The control module 52 can be used to determine in the determination module 51 that the main card of the multi-mode dual-card terminal cannot be used normally, and determine that the secondary card of the multi-mode dual-card terminal is in a usable state and that the secondary card supports the removal of all When using at least one access mode other than the access mode supported by the secondary channel of the multi-mode dual-card terminal, instruct the main channel of the multi-mode dual-card terminal to follow the secondary card or the multi-mode dual-card The terminal pre-stores the PLMN frequency point list of the operator network related to the secondary card to perform a network search for setting the access mode, wherein the setting access mode means that the secondary channel does not support but the secondary The access modes supported by the card.

That is to say, when it is determined that the main card cannot be used normally, and it is determined that the secondary card is available and that the secondary card can support one or more wireless access technologies other than the secondary channel access capability, the multi-mode dual-card terminal It can enter the corresponding access mode switching state to expand the actual access capability of the secondary card. Moreover, in order to ensure or improve data transmission efficiency, expanding the actual access capability of the secondary card usually refers to switching the secondary card to a larger bandwidth access mode, that is, switching the secondary card to a channel that does not support the secondary In the access mode supported by the card and having a higher priority than that of the access mode supported by the secondary channel, this embodiment of the present invention will not describe it in detail.

The determination module 51 can also be used to instruct the main channel in the control module 52 according to the PLMN frequency point of the operator network related to the secondary card that is pre-stored by the secondary card or the multi-mode dual-card terminal After the list performs a network search for setting the access mode, it is determined whether an available cell with the setting access mode is found in the main channel.

The control module 52 is further configured to instruct the main channel to access the searched cell with the configured access mode when the determining module 51 determines that the main channel has searched for an available cell with the configured access mode. in the corresponding network.

Specifically, if an available set access mode cell is found, the main channel can perform a corresponding attach procedure or perform a tracking area update (TAU, 4G network) or a routing area update or a location area update ( RAU, LAU, 3G network) and other operations, access to the corresponding network, so that the secondary card can access to the corresponding set access mode network through the main channel.

That is, in the technical solution described in the embodiment of the present invention, when it is determined that the main card cannot be used normally, and the secondary card is in an available state, and the secondary card supports at least one access mode other than the access mode supported by the secondary channel In the access mode, the user can use one or more wireless access technologies supported by the secondary card to transmit corresponding services through the main channel, and is no longer limited by the access mode supported by the secondary channel, thus expanding the scope of the secondary card The actual access capability improves the flexibility of terminal usage.

Further, the access mode switching device may further include a sending module 53 and a receiving module 54, wherein:

The sending module 53 may be configured to inform the corresponding multi-mode dual-card terminal of the information that the available configured access mode cell has been searched for after it is determined that the main path has searched for an available configured access mode cell. end users;

The receiving module 54 may be configured to receive indication information fed back by the terminal user whether to use the secondary card to access the network corresponding to the found cell with the set access mode.

Correspondingly, the control module 52 can be specifically configured to, when the receiving module 54 receives the indication information fed back by the terminal user that the secondary card is allowed to be used to access the network corresponding to the searched set access mode cell , indicating that the main channel is connected to the network corresponding to the searched cell with the configured access mode.

It should be noted that, if receiving the indication information fed back by the terminal user that the secondary card is not allowed to be used to access the network corresponding to the searched set access mode cell, the control module 52 may not need to instruct the The main channel is connected to the network corresponding to the searched cell with the set access mode. At this time, the secondary card will still use the secondary channel to maintain network access.

Further, the control module 52 is further configured to instruct the secondary channel to detach from the network where it resides after instructing the primary channel to access the network corresponding to the searched cell with the set access mode .

Further, the control module 52 can also be used to instruct the main channel to perform the operation according to the PLMN frequency point list of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal. After the network search of the set access mode, if according to the determination result of the determination module 51, it is determined that the main channel has not searched for an available set access mode cell, then instruct the main channel to follow the preset cycle , and the PLMN frequency point list of the operator network pre-stored by the main card, the secondary card, or the multi-mode dual-card terminal performs a network search; wherein, instructing the main channel according to the main card, the When the secondary card or the PLMN frequency point list of the operator network pre-stored by the multi-mode dual-card terminal performs a network search, the search priority of the PLMN frequency point list of the operator network related to the main card is higher than that of the operator network. The search priority of the PLMN frequency point list of the operator network related to the secondary card; and,

According to the determination result of the determination module 51, it is determined that the main channel has searched for an available main card cell, and it is determined that the reason why the main card cannot be used normally before is that the signal quality is lower than the preset threshold, instruct the main card Access to the network corresponding to the available main card cell;

Or, according to the determination result of the determination module 51, it is determined that the main channel does not search for an available main card cell, but when an available set access mode cell is found, indicate that the main channel accesses the searched cell. In the network corresponding to the set access mode cell;

Or, according to the determination result of the determination module 51, when it is determined that the main channel has not searched for an available main card cell, and has not found an available set access mode cell, instruct the main channel to continue to perform the above The main card, the secondary card, or the multi-mode dual-card terminal pre-stores the PLMN frequency point list of the operator network to perform a network search operation.

That is to say, instructing the main channel to search for the set access mode network according to the PLMN frequency point list of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal Afterwards, if it is determined that the main channel does not search for an available set access mode cell, the multi-mode dual-card terminal can enter the corresponding network search state, instruct the main channel to follow a preset cycle, and the The main card, the secondary card or the PLMN frequency point list of the operator's network pre-stored by the multi-mode dual-card terminal is used for network search.

Further, it should be noted that, in the embodiment of the present invention, when instructing the main path, according to the information of the operator network related to the secondary card stored in advance by the secondary card or the multi-mode dual-card terminal After the PLMN frequency point list searches for the set access mode network, if it is determined that no available set access mode cell is found in the main channel, when the multi-mode dual-card terminal is in the network search state, it can indicate The secondary card of the multi-mode dual-card terminal still uses the secondary channel to maintain network access, which is not described in this embodiment of the present invention.

Correspondingly, the determination module 51 can also be used to instruct the main channel in the control module 52 according to the PLMN frequency of the operator network pre-stored by the main card, the secondary card or the multi-mode dual-card terminal. After the network search is performed on the point list, it is determined whether an available main card cell and/or a set access mode cell is found in the main path.

Further, the access mode switching device may also include a state monitoring module 55:

The state monitoring module 55 can be used to monitor in real time whether the main card has returned to an available state;

The control module 52 can also be used to determine that the main channel is connected to the network corresponding to the searched set access mode cell according to the monitoring result of the state monitoring module 55 after instructing the main channel to access If the card has recovered the usable state, instruct the main card to re-reside in the corresponding main channel access network, and at the same time instruct the secondary card to fall back to the corresponding secondary channel access network.

That is to say, after the main channel is instructed to access the network corresponding to the searched set access mode cell (that is, when the multi-mode dual-card terminal is in the access mode switching state), if it is determined that the The main card has been restored to the usable state, then the multi-mode dual-card terminal can enter the corresponding access mode fallback state, instruct the main card to re-reside in the corresponding main channel access network, and at the same time instruct the secondary card to return to the corresponding access mode. Return to the corresponding secondary channel to access the network.

Further, the control module 52 can be specifically configured to, after instructing the main channel to access the network corresponding to the searched set access mode cell, if according to the monitoring result of the state monitoring module 55, determine The main card has been restored to an available state, if it is determined that the secondary channel is in an idle state, then instruct the secondary channel to operate according to the main card or the multi-mode dual-card terminal pre-stored related to the main card. The PLMN frequency point list of the provider network, and perform a network search according to the access mode supported by the secondary channel; and

If it is determined that the secondary channel has searched for an available primary card cell, instruct the secondary channel to camp in the corresponding primary card cell and obtain the neighbor cell information of the primary card cell where it resides; and,

Instructing the main channel to perform a network search according to the set network priority according to the neighbor cell information obtained by the secondary channel when the service processing volume is lower than the set threshold or in the non-paging cycle; and

When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available main card cell found by the main channel in the corresponding network; and,

After determining that the main channel has successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to detach from the network where the main card resides, and reside to the available cell corresponding to the access mode supported by the secondary channel.

Further, the control module 52 can also be specifically configured to, after instructing the main channel to access the network corresponding to the searched set access mode cell, if according to the monitoring result of the state monitoring module 55, If it is determined that the main card has been restored to an available state, then instruct the main channel to use the pre-stored and The PLMN frequency point list of the operator network related to the main card, according to the access mode supported by the main channel and the set network priority, perform a network search; and

When it is determined that the main channel has searched for an available main card cell, instruct the main channel to detach the network where the secondary card resides, and access the available main card cell found by the main channel in the corresponding network; and,

After it is determined that the main channel is successfully connected to the network corresponding to the available main card cell searched by the main channel, instruct the secondary channel to pre-store according to the secondary card or the multi-mode dual-card terminal The PLMN frequency point of the operator network related to the secondary card, conducts a network search and resides in an available cell corresponding to the access mode supported by the secondary channel.

That is to say, after the secondary card is switched to the main channel, the multi-mode dual-card terminal can monitor in real time whether the main card has returned to the available state, and when it is determined that the main card has returned to the available state, enter the access mode fallback state, Instruct the main card to re-resident to the corresponding main channel access network, and at the same time instruct the secondary card to fall back to the corresponding secondary channel access network, so that the multi-mode dual-card terminal can return to the corresponding normal use state.

Specifically, according to different applicable scenarios, the main card re-residents to the corresponding main channel access network, and the secondary card returns to the corresponding secondary channel access network at the same time. According to the access mode supported by the main card and the PLMN information of the local network, the terminal can automatically select the corresponding fallback solution. For example, in one embodiment, if the main card supports 4G/3G/2G access mode, and through the local PLMN information, it is found that there is no 2G network environment in the local area, and the secondary channel only supports 2G access, then the terminal must select the The fallback solution is not described in this embodiment of the present invention.

Further, the control module 52 can also be used to determine that the main card of the multi-mode dual-card terminal cannot be used normally according to the determination result of the determination module 51, and determine that the secondary card of the multi-mode dual-card terminal is available state and the secondary card supports at least one access mode other than the access mode supported by the secondary channel of the multi-mode dual-card terminal, then the original secondary card is upgraded or adapted to the current primary card, and the The original primary card is downgraded or adapted to the current secondary card; or,

After it is determined that the original main card has returned to a usable state, the current secondary card is upgraded or adapted to be a main card, and the current main card is downgraded or adapted to be a secondary card.

That is to say, if it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and it is determined that the secondary card of the multi-mode dual-card terminal is available and the secondary card supports the secondary channel except for the multi-mode dual-card terminal If there is at least one access mode other than the supported access mode, the relationship between the primary card and the secondary card can be reversed. Correspondingly, after it is determined that the original main card has returned to a usable state, the previously swapped main card and the secondary card may be swapped again, which will not be described in detail in this embodiment of the present invention.

Further, the control module 52 can also be used to determine that the main card of the multi-mode dual-card terminal cannot be used normally according to the determination result of the determination module 51, then instruct the main channel of the multi-mode dual-card terminal to follow the Before the secondary card or the PLMN frequency point list of the operator network related to the secondary card stored in advance by the multi-mode dual-card terminal performs a network search for setting the access mode, determine the frequency of the multi-mode dual-card terminal The duration during which the main card cannot be used normally is longer than the preset duration threshold.

That is to say, preferably, when it is determined that the signal quality of the main card is lower than the preset threshold due to coverage problems, or cannot be used normally for a preset period of time due to problems such as tariffs and traffic, and it is determined that the secondary card is available state and the secondary card (or secondary card type) can support one or more wireless access technologies other than the secondary channel access capability, the multi-mode dual-card terminal will enter the corresponding access mode switching state to Expand the actual access capability of the secondary card.

Furthermore, Embodiment 2 of the present invention also provides a multi-mode dual-card terminal, as shown in FIG. 6 , which is a schematic structural diagram of the multi-mode dual-card terminal described in Embodiment 2 of the present invention. The multi-mode dual-card The terminal may include the access mode switching device 61 described in Embodiment 2 of the present invention, wherein the specific structure and functions of the access mode switching device 61 can refer to the relevant description in Embodiment 2 of the present invention, and will not be repeated here. .

In addition, the multi-mode dual-card terminal can also include corresponding main card 62, secondary card 63, main channel 64 and secondary channel 65, etc., and the main card 62, secondary card 63, main channel 64 and secondary channel 65 etc. can perform corresponding network search and switching operations according to the control of the access mode switching device 61, which will not be described in detail in this embodiment of the present invention.

Embodiment 2 of the present invention provides an access mode switching device for a multi-mode dual-card terminal and a multi-mode dual-card terminal. If it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, and the secondary If the card is available and the secondary card supports at least one access mode other than the access mode supported by the secondary channel, it can instruct the main channel of the multi-mode dual-card terminal to follow the pre-stored operator related to the secondary card. The PLMN frequency point list of the network conducts a network search for the set access mode, and when it is determined that an available set access mode cell is searched, instruct the main channel to access the network corresponding to the searched set access mode cell , so that the secondary card can access the corresponding set access mode network through the main channel, wherein the set access mode refers to an access mode that is not supported by the secondary channel but supported by the secondary card . That is to say, in the technical solution described in the embodiment of the present invention, the user can use one or more wireless access technologies supported by the secondary card to transmit corresponding services through the main channel, and is no longer supported by the secondary card. Therefore, without modifying the hardware structure of the existing multi-mode dual-card terminal, the actual access capability of the secondary card can be expanded, the flexibility of the terminal usage mode can be improved, and the user experience can be improved.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, devices (devices), or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (19)

1. An access mode switching method for a multimode dual-card terminal is characterized by comprising the following steps:

if it is determined that a main card of a multi-mode dual-card terminal cannot be normally used and it is determined that a secondary card of the multi-mode dual-card terminal is in an available state and the secondary card supports at least one other access mode except an access mode supported by a secondary access of the multi-mode dual-card terminal, indicating the main access of the multi-mode dual-card terminal to perform network search for setting an access mode according to a Public Land Mobile Network (PLMN) frequency point list of an operator network related to the secondary card, which is pre-stored by the secondary card or the multi-mode dual-card terminal; the set access mode refers to an access mode which is not supported by the auxiliary access but supported by the auxiliary card;

and if the main access is determined to search the available set access mode cell, indicating the main access to the network corresponding to the searched set access mode cell.

2. The method of access mode switching according to claim 1, wherein after determining that the primary path searches for an available set access mode cell, the method further comprises:

informing the terminal user corresponding to the multimode dual-card terminal of the information of the searched available cell with the set access mode, and receiving the indication information fed back by the terminal user whether the auxiliary card is allowed to be used for accessing the searched network corresponding to the cell with the set access mode;

instructing the main access to the network corresponding to the searched cell with the set access mode, wherein the method comprises the following steps:

and if receiving the indication information fed back by the terminal user and allowing the secondary card to be used for accessing the searched network corresponding to the set access mode cell, indicating the main channel to be accessed to the searched network corresponding to the set access mode cell.

3. The method of claim 1, wherein after instructing the main access to the network corresponding to the searched cell with the set access mode, the method further comprises:

instructing the secondary path to detach from the network on which it resides.

4. The method for switching access modes according to claim 1, wherein after the main channel is instructed to perform network search for setting an access mode according to a PLMN frequency point list of an operator network related to the secondary card, which is pre-stored in the secondary card or the multi-mode dual-card terminal, the method further comprises:

if the fact that the main access does not search an available cell with a set access mode is determined, the main access is indicated to conduct network search according to a preset period and a PLMN frequency point list of an operator network stored in advance by a main card, a secondary card or a multi-mode dual-card terminal, wherein when the main access is indicated to conduct network search according to the PLMN frequency point list of the operator network stored in advance by the main card, the secondary card or the multi-mode dual-card terminal, the search priority of the PLMN frequency point list of the operator network related to the main card is higher than the search priority of the PLMN frequency point list of the operator network related to the secondary card; and are

When determining that the main access searches available main card cells and determining that the reason that the main card cannot be normally used before is that the signal quality is lower than a preset threshold, indicating the main access to a network corresponding to the available main card cells; or when determining that the main path does not search an available main card cell but searches an available set access mode cell, indicating the main path to access to a network corresponding to the searched set access mode cell; or, when it is determined that the main path does not search for an available main card cell and does not search for an available set access mode cell, instructing the main path to continue to perform the network search operation according to the PLMN frequency point list of the operator network, which is pre-stored by the main card, the secondary card or the multi-mode dual-card terminal.

5. The method of claim 1, wherein after instructing the main access to the network corresponding to the searched cell with the set access mode, the method further comprises:

and if the main card is determined to recover the available state, indicating the main card to reside in the corresponding main access network again, and simultaneously indicating the auxiliary card to roll back to the corresponding auxiliary access network.

6. The method of claim 5, wherein if it is determined that the primary card has recovered the available state, instructing the primary card to re-camp to the corresponding primary access network and instructing the secondary card to fallback to the corresponding secondary access network comprises:

if the auxiliary access is determined to be in an idle state, indicating the auxiliary access to perform network search according to an access mode supported by the auxiliary access according to a PLMN frequency point list of an operator network related to the main card and pre-stored by the main card or the multi-mode dual-card terminal;

if the fact that the available main card cell is searched by the auxiliary access is determined, the auxiliary access is indicated to reside in the corresponding main card cell, and adjacent cell information of the main card cell where the auxiliary access resides is obtained; and the number of the first and second groups,

when the service processing capacity of the main path is lower than a set threshold value or in a non-paging cycle, network search is carried out according to the set network priority and the neighbor information acquired by the auxiliary path; and are

When determining that the main path searches available main card cells, indicating the main path to attach to a network where the auxiliary card resides and accessing to a network corresponding to the available main card cells searched by the main path; and the number of the first and second groups,

and after the main access is successfully accessed to the network corresponding to the available main card cell searched by the main access, indicating the auxiliary access to attach to the network where the main card resides and reside in the available cell corresponding to the access mode supported by the auxiliary access.

7. The method of claim 5, wherein if it is determined that the primary card has recovered the available state, instructing the primary card to re-camp to the corresponding primary access network and instructing the secondary card to fallback to the corresponding secondary access network comprises:

when the service processing capacity of the main channel is indicated to be lower than a set threshold value or in a non-paging cycle, network search is carried out according to an access mode supported by the main channel and a set network priority according to a PLMN frequency point list of an operator network related to the main card and pre-stored by the main card or the multi-mode dual-card terminal;

when determining that the main path searches available main card cells, indicating the main path to attach to a network where the auxiliary card resides and accessing to a network corresponding to the available main card cells searched by the main path; and the number of the first and second groups,

and after the main channel is successfully accessed to the network corresponding to the available main card cell searched by the main channel, indicating the auxiliary channel to search the network and reside in the available cell corresponding to the access mode supported by the auxiliary channel according to the PLMN frequency point of the operator network related to the auxiliary card and pre-stored by the auxiliary card or the multi-mode dual-card terminal.

8. The method of claim 1, wherein if it is determined that a primary card of a multi-mode dual-card terminal cannot be normally used, and it is determined that a secondary card of the multi-mode dual-card terminal is in an available state and the secondary card supports at least one access mode other than the access mode supported by the secondary path of the multi-mode dual-card terminal, the method further comprises:

upgrading or self-adapting the original auxiliary card to be the current main card, and degrading or self-adapting the original main card to be the current auxiliary card;

after determining that the original master card has recovered the available state, the method further comprises:

and upgrading or self-adapting the current auxiliary card to be a main card, and degrading or self-adapting the current main card to be an auxiliary card.

9. The method for switching access modes according to claim 1, wherein if it is determined that the main card of the multi-mode dual-card terminal cannot be used normally, before instructing the main channel of the multi-mode dual-card terminal to perform network search for setting an access mode according to the secondary card or a PLMN frequency point list of an operator network related to the secondary card, which is pre-stored in the multi-mode dual-card terminal, the method further comprises:

and determining that the time length of the main card of the multi-mode dual-card terminal which cannot be normally used is greater than a preset time length threshold value.

10. An access mode switching device of a multimode dual-card terminal, comprising:

the determining module is used for determining whether the multimode dual-card terminal meets the following conditions: the main card of the multimode dual-card terminal cannot be normally used, the auxiliary card of the multimode dual-card terminal is in an available state, and the auxiliary card supports at least one other access mode except the access mode supported by the auxiliary access of the multimode dual-card terminal;

the control module is used for indicating the main channel of the multimode dual-card terminal to perform network search of a set access mode according to a Public Land Mobile Network (PLMN) frequency point list of an operator network related to the auxiliary card, which is prestored by the auxiliary card or the multimode dual-card terminal, when the determining module determines that the main card of the multimode dual-card terminal cannot be normally used and determines that the auxiliary card of the multimode dual-card terminal is in an available state and the auxiliary card supports at least one other access mode except the access mode supported by the auxiliary channel of the multimode dual-card terminal; the set access mode refers to an access mode which is not supported by the auxiliary access but supported by the auxiliary card;

the determining module is further configured to determine whether the main path searches an available cell in the set access mode after the control module instructs the main path to perform network search in the set access mode according to a PLMN frequency point list of an operator network related to the secondary card and pre-stored in the secondary card or the multi-mode dual-card terminal;

the control module is further configured to instruct the main path to access to a network corresponding to the searched cell with the set access mode when the determination module determines that the main path searches for the available cell with the set access mode.

11. The access mode switching device of claim 10, wherein the access mode switching device further comprises a transmitting module and a receiving module:

the sending module is used for informing the terminal user corresponding to the multimode dual-card terminal of the information of the searched available cell in the set access mode after the main access is determined to search the available cell in the set access mode;

the receiving module is used for receiving the indication information fed back by the terminal user whether to allow the secondary card to access the searched network corresponding to the cell with the set access mode;

the control module is specifically configured to, when the receiving module receives indication information fed back by the terminal user and allowing access to the searched network corresponding to the cell in the set access mode by using the secondary card, indicate the primary access to the searched network corresponding to the cell in the set access mode.

12. The access mode switching device of claim 10,

the control module is further configured to instruct the secondary access to attach to a network where the secondary access resides after instructing the primary access to the network corresponding to the searched cell with the set access mode.

13. The access mode switching device of claim 10,

the control module is further configured to instruct the main channel to perform network search for setting an access mode according to a PLMN frequency point list of an operator network related to the secondary card and pre-stored by the secondary card or the multi-mode dual-card terminal, if the main channel does not search the available cell with the set access mode according to the determination result of the determination module, indicating the main channel to perform network search according to a preset period and a PLMN frequency point list of an operator network prestored by the main card, the auxiliary card or the multimode dual-card terminal, wherein, when the main channel is indicated to perform network search according to the PLMN frequency point list of the operator network pre-stored by the main card, the auxiliary card or the multimode dual-card terminal, the search priority of the PLMN frequency point list of the operator network related to the main card is higher than that of the PLMN frequency point list of the operator network related to the auxiliary card; and the number of the first and second groups,

when determining that the main access searches for an available main card cell according to the determination result of the determination module and determining that the reason that the main card cannot be normally used before is that the signal quality is lower than a preset threshold, indicating that the main access is accessed to a network corresponding to the available main card cell; or, when determining that the main path does not search for an available main card cell but searches for an available set access mode cell according to the determination result of the determination module, indicating the main path to access to a network corresponding to the searched set access mode cell; or, when determining that the main channel does not search an available main card cell and does not search an available set access mode cell according to the determination result of the determination module, instructing the main channel to continue to perform the operation of network search according to the PLMN frequency point list of the operator network pre-stored by the main card, the auxiliary card or the multi-mode dual-card terminal;

the determining module is further configured to determine whether the main channel searches an available main card cell and/or a cell in a set access mode after the control module instructs the main channel to perform network search according to a PLMN frequency point list of an operator network pre-stored by the main card, the auxiliary card, or the multi-mode dual-card terminal.

14. The access mode switching device of claim 10, wherein the access mode switching device further comprises a status monitoring module:

the state monitoring module is used for monitoring whether the main card recovers the available state in real time;

the control module is further configured to, after instructing the primary access to a network corresponding to the searched cell in the set access mode, if it is determined that the primary card has recovered the available state according to the monitoring result of the state monitoring module, instruct the primary card to camp again on the corresponding primary access network, and instruct the secondary card to back to the corresponding secondary access network.

15. The access mode switching device of claim 14,

the control module is specifically configured to, after instructing the primary access to a network corresponding to a searched cell in a set access mode, if it is determined that the primary card is in a recovered available state according to a monitoring result of the state monitoring module, instruct the secondary access to perform network search according to an access mode supported by the secondary access according to a PLMN frequency point list of an operator network related to the primary card, where the PLMN frequency point list is pre-stored by the primary card or the multimode dual-card terminal and is associated with the primary card, if it is determined that the secondary access is in an idle state; and are

If the fact that the available main card cell is searched by the auxiliary access is determined, the auxiliary access is indicated to reside in the corresponding main card cell, and adjacent cell information of the main card cell where the auxiliary access resides is obtained; and the number of the first and second groups,

when the service processing capacity of the main path is lower than a set threshold value or in a non-paging cycle, network search is carried out according to the set network priority and the neighbor information acquired by the auxiliary path; and are

When determining that the main path searches available main card cells, indicating the main path to attach to a network where the auxiliary card resides and accessing to a network corresponding to the available main card cells searched by the main path; and the number of the first and second groups,

and after the main access is successfully accessed to the network corresponding to the available main card cell searched by the main access, indicating the auxiliary access to attach to the network where the main card resides and reside in the available cell corresponding to the access mode supported by the auxiliary access.

16. The access mode switching device of claim 14,

the control module is specifically configured to, after instructing the main channel to access to a network corresponding to a searched cell in a set access mode, if it is determined that the main card has recovered an available state according to a monitoring result of the state monitoring module, instruct the main channel to perform network search according to an access mode supported by the main channel and a set network priority according to a PLMN frequency point list of an operator network related to the main card and pre-stored by the main card or the multimode dual-card terminal when a service processing amount of the main channel is lower than a set threshold or in a non-paging cycle; and are

When determining that the main path searches available main card cells, indicating the main path to attach to a network where the auxiliary card resides and accessing to a network corresponding to the available main card cells searched by the main path; and the number of the first and second groups,

and after the main channel is successfully accessed to the network corresponding to the available main card cell searched by the main channel, indicating the auxiliary channel to search the network and reside in the available cell corresponding to the access mode supported by the auxiliary channel according to the PLMN frequency point of the operator network related to the auxiliary card and pre-stored by the auxiliary card or the multi-mode dual-card terminal.

17. The access mode switching device of claim 10,

the control module is further configured to, if it is determined that the main card of the multimode dual-card terminal cannot be normally used according to the determination result of the determination module, and it is determined that the auxiliary card of the multimode dual-card terminal is in an available state and the auxiliary card supports at least one other access mode except the access mode supported by the auxiliary access of the multimode dual-card terminal, upgrade or adaptively change the original auxiliary card to the current main card, and downgrade or adaptively change the original main card to the current auxiliary card; or,

and after determining that the original main card restores the available state, upgrading or self-adapting the current auxiliary card to be the main card, and degrading or self-adapting the current main card to be the auxiliary card.

18. The access mode switching device of claim 10,

the control module is further configured to determine that a duration of the abnormal use of the main card of the multi-mode dual-card terminal is greater than a preset duration threshold before indicating that the main channel of the multi-mode dual-card terminal performs network search in a set access mode according to the secondary card or a PLMN frequency point list of an operator network related to the secondary card, which is pre-stored in the multi-mode dual-card terminal, according to a determination result of the determination module.

19. A multimode dual-card terminal, characterized in that it comprises an access mode switching device according to any one of claims 10 to 18.