CN104284456B - A kind of multi-module mobile terminal - Google Patents
A kind of multi-module mobile terminal Download PDFInfo
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- CN104284456B CN104284456B CN201310277183.7A CN201310277183A CN104284456B CN 104284456 B CN104284456 B CN 104284456B CN 201310277183 A CN201310277183 A CN 201310277183A CN 104284456 B CN104284456 B CN 104284456B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 96
- 238000004891 communication Methods 0.000 claims abstract description 48
- 238000012546 transfer Methods 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims description 43
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
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- 230000007246 mechanism Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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Abstract
The present invention provides a kind of multi-module mobile terminal, including：Main baseband chip, from baseband chip, Multiplexing Unit；Main baseband chip includes control module；Control module, for under transfer mode, the first control signal that transparent transmission mode is switched to from transfer mode is sent out to Multiplexing Unit, under transparent transmission mode, the second control signal that transparent transmission listening mode is switched to from transparent transmission mode is sent out to Multiplexing Unit, under transparent transmission listening mode, the third control signal that transfer mode is switched to from transparent transmission listening mode is sent out to Multiplexing Unit；Multiplexing Unit, for according to first control signal, controlling from baseband chip and SIM card direct communication；According to second control signal, controls main baseband chip and the communication between baseband chip and SIM card is monitored；Signal is controlled according to third, main baseband chip is controlled and concurrently accesses SIM card from baseband chip.It switches over to avoid from the normal communication of baseband chip and SIM card after sign off and is forced the defect interrupted.
Description
Technical Field
The present invention relates to communications technologies, and in particular, to a multi-mode mobile terminal.
Background
In order to improve the utilization rate of a mobile communication network and user experience, terminals with the capability of simultaneously waiting for multiple communication systems gradually appear, and the terminals can simultaneously perform cell search, residence and waiting in networks with multiple communication systems and simultaneously perform services in multiple networks. The terminal integrates a plurality of communication systems by a single baseband chip, and the single baseband chip coordinates the access of the plurality of communication systems to the SIM card; the single-card multi-baseband chip comprises a terminal consisting of a plurality of baseband chips, and the plurality of baseband chips share and access 1 SIM card; the multi-card multi-baseband chip is characterized in that a terminal is composed of a plurality of baseband chips, each baseband chip independently accesses 1 SIM card, and one baseband chip cannot access the SIM cards which are accessed by other baseband chips.
With the increasing of communication systems, the difficulty of integrating multiple communication systems with a single baseband chip by adding a new communication system to the existing baseband chip is continuously increased, the research and development period is continuously prolonged, and the rapid marketing of a standby terminal of multiple communication systems at the same time is difficult to realize. Since the communication system supported by the baseband chip cannot be changed, the terminal cannot flexibly select a communication system that needs to be simultaneously standby.
For the method of multi-card multi-baseband chip, when the communication system is more, many SIM cards are needed, and the use is inconvenient.
Since a plurality of baseband chips are involved in sharing and accessing one SIM card, a mechanism for sharing the SIM card needs to be designed. There are generally two ways: a transfer mode: when a plurality of baseband chips need to access the SIM card concurrently, the SIM card is directly controlled by one baseband chip and is called as a main baseband chip; the other baseband chips are called slave baseband chips. And the access of the slave baseband chip to the SIM card is realized through the transfer of the master baseband chip. In the main baseband chip, concurrent SIM access commands from a plurality of baseband chips are temporarily stored through software, and then are queued according to APDUs, and the access to the SIM card is finished in sequence. A transparent transmission mode: when a plurality of baseband chips do not need to access the SIM card concurrently, if a certain slave baseband chip wants to access the SIM card, the master baseband chip directly connects the slave baseband chip to the SIM card through the selection switch, so that the slave baseband chip directly accesses the SIM card in a transparent transmission mode without transferring. Thereby reducing power consumption.
In the prior art, one of two modes is adopted according to whether a plurality of baseband chips need to access the SIM card concurrently. As shown in fig. 1, when both the master baseband chip and the slave baseband chip need to access the SIM card, the slave baseband chip accesses the SIM card through the USIM slave interface provided by the master baseband chip, which is a relay mode. When the master baseband chip does not need to access the SIM card, the application processor directly connects the slave baseband chip to the SIM card through the analog switch, controls the slave baseband chip to reinitialize the SIM card after being reset, and then the slave baseband chip can directly access the SIM card, wherein the method is a transparent transmission mode.
The transit mode can support both concurrent access and non-concurrent access, but is high in power consumption. The pass-through mode is low power consuming but supports only non-concurrent accesses.
In practical application, the same terminal does not always need concurrent access, and if the terminal can automatically switch between two modes according to a working scene, the power consumption can be reduced while the function is met.
The prior art has the following problems: in the transparent transmission mode, if the master baseband chip wants to access the SIM card, the master baseband chip needs to go to the relay mode, and this state transition may destroy the communication between the slave baseband chip and the SIM card, making it incomplete. When the slave baseband chip is in the transparent transmission mode, the master baseband chip does not participate in the communication between the slave baseband chip and the SIM card, so that the master baseband chip cannot determine whether the APDU is finished once, that is, cannot determine the time suitable for switching. If switching is attempted, it may happen that the communication from the baseband chip and the SIM card is switched just halfway, resulting in the communication being broken this time. Another method is to switch the master baseband chip and the slave baseband chip after resetting, and reinitialize the SIM card, but this will result in the user not being able to use the multi-mode terminal for a short time.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a multi-mode mobile terminal, which is used to solve the defect in the prior art that when the multi-mode mobile terminal is switched between different modes, the current communication may be damaged.
To solve the above technical problem, an embodiment of the present invention provides a multimode mobile terminal, including: the master baseband chip, the slave baseband chip and the multiplexing unit; the main baseband chip comprises a control module; the control module is used for sending a first control signal which is switched from the transit mode to the transparent transmission mode to the multiplexing unit in the transit mode, sending a second control signal which is switched from the transparent transmission mode to the transparent transmission monitoring mode to the multiplexing unit in the transparent transmission mode, and sending a third control signal which is switched from the transparent transmission monitoring mode to the transit mode to the multiplexing unit in the transparent transmission monitoring mode; the multiplexing unit is used for controlling the slave baseband chip to directly communicate with the SIM card according to a first control signal; controlling the master baseband chip to monitor the communication between the slave baseband chip and the SIM card according to a second control signal; and controlling the master baseband chip and the slave baseband chip to access the SIM card concurrently according to a third control signal.
The multi-mode mobile terminal further comprises: the application processor is used for sending a starting signal to start the main baseband chip and initializing the main baseband chip; and sending a starting signal to start the slave baseband chip and initializing the slave baseband chip.
In the multimode mobile terminal, the multiplexing unit comprises: an analog switch and a multiplexer; wherein the multiplexer includes a first multiplexer, a second multiplexer, and a third multiplexer.
In the multi-mode mobile terminal, the analog switch is used for executing the switching among the transparent transmission mode, the transparent transmission monitoring mode and the transfer mode of different interfaces of the main baseband chip, the interface of the slave baseband chip and the interface of the SIM card according to the first control signal, the second control signal or the third control signal.
In the multi-mode mobile terminal, the analog switch is used for connecting the first interface of the main baseband chip with the SIM card data interface in a transfer mode to realize that the main baseband chip accesses the SIM card through the analog switch, and connecting the data interface of the slave baseband chip with the second interface of the main baseband chip to realize that the slave baseband chip accesses the SIM card through the main baseband chip; in a transparent transmission mode, a data interface of the slave baseband chip is connected and conducted with a data interface of the SIM card, so that the slave baseband chip is directly communicated with the SIM card, and the master baseband chip is controlled to enter a sleep state; and in the transparent transmission monitoring mode, the second interface of the master baseband chip is conducted with the data interface of the slave baseband chip and the first interface of the master baseband chip, and the communication between the slave baseband chip and the SIM card is monitored through the second interface of the master baseband chip.
In the multi-mode mobile terminal, the multiplexer is used for switching the signal line of the SIM card between the master baseband chip and the slave baseband chip according to the first control signal, the second control signal or the third control signal.
In the multi-mode mobile terminal, a first multiplexer is used for multiplexing a signal line of a clock signal of a main baseband chip to a signal line of a clock signal of an SIM card in a transfer mode; the second multiplexer is used for multiplexing the signal line of the reset signal of the main baseband chip to the signal line of the reset signal of the SIM card according to the control signal in a transfer mode; and the third multiplexer is used for multiplexing the signal line of the voltage signal of the main baseband chip to the signal line of the voltage signal of the SIM card according to the control signal in the transfer mode.
In the multi-mode mobile terminal, a first multiplexer is used for multiplexing a signal line of a clock signal of a baseband chip to a signal line of a clock signal of an SIM card in a transparent transmission mode; the second multiplexer is used for multiplexing the signal line of the reset signal of the baseband chip to the signal line of the reset signal of the SIM card in a transparent transmission mode; and the third multiplexer is used for multiplexing the signal line of the voltage signal of the baseband chip to the signal line of the voltage signal of the SIM card in the transparent transmission mode.
In the multi-mode mobile terminal, a first multiplexer is used for multiplexing a signal line of a clock signal of a baseband chip to a signal line of a clock signal of an SIM card in a transparent transmission monitoring mode; the second multiplexer is used for multiplexing the signal line of the reset signal of the baseband chip to the signal line of the reset signal of the SIM card in a transparent transmission monitoring mode; and the third multiplexer is used for multiplexing the signal wire of the voltage signal of the baseband chip to the signal wire of the voltage signal of the SIM card in the transparent transmission monitoring mode.
In the multi-mode mobile terminal, the control module further comprises: and the application protocol data judging unit is used for sending a third control signal to the analog switch to switch the analog switch to a transfer mode after finding that the communication of one application protocol data unit is completed in the transparent transmission monitoring mode.
The technical scheme of the invention has the following beneficial effects: the transparent transmission monitoring mode is added between the transparent transmission mode and the transparent transmission mode, the slave baseband chip and the SIM card are in direct communication in the transparent transmission monitoring mode, the communication can be monitored by the master baseband chip, the master baseband chip determines the time when the communication between the slave baseband chip and the SIM card is finished by monitoring, the switching is carried out after the communication is finished, the situation that the normal communication between the slave baseband chip and the SIM card is forcibly interrupted is avoided, and the safe switching is realized.
Drawings
Fig. 1 is a schematic diagram of a multi-mode terminal sharing access to a SIM card by a multi-baseband chip in the prior art;
fig. 2 is a schematic diagram illustrating a multi-mode mobile terminal;
FIG. 3 is a schematic diagram showing the connection relationship of multiplexers;
fig. 4 shows a state transition diagram of a multimode terminal;
FIG. 5 is a schematic diagram showing the connection relationship of the analog switch in the relay mode;
FIG. 6 is a schematic diagram showing the connection relationship of the analog switch in the transparent transmission mode;
fig. 7 is a schematic diagram illustrating a connection relationship of the analog switch in the transparent transmission listening mode.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The single-card multi-baseband chip, a plurality of baseband chips share and access one SIM card, and a mechanism for sharing the SIM card needs to be designed. There are generally two ways: a transit mode and a transparent transmission mode.
A transfer mode: when a master baseband chip (TD-LTE BB, TDL for short) and a slave baseband chip (TD-SCDMA BB, TDS for short) both need to access the SIM card, the slave baseband chip accesses the SIM card through a USIM slave interface provided by the master baseband chip.
A transparent transmission mode: when a plurality of baseband chips do not need to access the SIM card concurrently, if a certain slave baseband chip accesses the SIM card, the master baseband chip directly connects the slave baseband chip to the SIM card through the analog switch, so that the slave baseband chip directly accesses the SIM card in a transparent transmission mode without transferring, thereby reducing the power consumption.
In the embodiment of the invention, the mobile terminal needs to be switched to the transfer mode in the transparent transmission mode if the main baseband chip needs to access the SIM card. The safety switching is divided into two steps, namely firstly, the transparent transmission mode is switched to the transparent transmission monitoring mode, and then the transparent transmission monitoring mode is switched to the transfer mode.
An embodiment of the present invention provides a multimode mobile terminal, as shown in fig. 2, including: a master baseband chip (SIMMaster), a slave baseband chip, a multiplexing unit and a SIM card; wherein,
the main baseband chip comprises a control module;
the control module is used for sending a first control signal for switching from the transit mode to the transparent transmission mode to the multiplexing unit in the transit mode,
and in the transparent transmission mode, sending a second control signal for switching from the transparent transmission mode to the transparent transmission monitoring mode to the multiplexing unit,
and sending a third control signal for switching from the transparent transmission monitoring mode to the transfer mode to the multiplexing unit in the transparent transmission monitoring mode;
the multiplexing unit is used for controlling the slave baseband chip to directly communicate with the SIM card according to a first control signal; controlling the master baseband chip to monitor the communication between the slave baseband chip and the SIM card according to a second control signal; and controlling the master baseband chip and the slave baseband chip to access the SIM card concurrently according to a third control signal.
By applying the provided technical scheme, a transparent transmission monitoring mode is added between a transparent transmission mode and a transparent transmission mode, the slave baseband chip and the SIM card are in direct communication in the transparent transmission monitoring mode, the communication can be monitored by the master baseband chip, the master baseband chip determines the time when the communication between the slave baseband chip and the SIM card is finished by monitoring, and the condition that the normal communication between the slave baseband chip and the SIM card is forcibly interrupted is avoided by switching after the communication is finished, so that the safe switching is realized.
The timing when the communication between the baseband chip and the SIM card is completed is generally indicated by the completion of an Application Protocol Data Unit (APDU).
As shown in fig. 2, the multi-mode mobile terminal includes two baseband chips: a master baseband chip, a slave baseband chip. The main baseband chip is mainly used for 4G or 5G services, and the slave baseband chip is mainly used for 2G or 3G services.
The main baseband chip TDL provides two SIM card interfaces, as shown in fig. 2, wherein a main baseband chip first interface (USIM Master) is used for connecting with the SIM card, and a main baseband chip second interface (USIMSlaver) is used for connecting with the slave baseband chip TDS.
The multimode terminal provides three operating modes: a transit mode, a transparent transmission mode and a transparent transmission monitoring mode.
In a preferred embodiment, the multimode mobile terminal further comprises:
the application processor is used for sending a starting signal to start the main baseband chip and initializing the main baseband chip; and sending a starting signal to start the slave baseband chip and initializing the slave baseband chip.
In a preferred embodiment, the multiplexing unit includes: analog Switch (Analog Switch) and multiplexer (Mux); wherein,
the multiplexer includes a first multiplexer, a second multiplexer, and a third multiplexer.
In a preferred embodiment, as shown in figure 3,
and the analog switch is used for executing the connection relation among different interfaces of the main baseband chip, the interfaces of the slave baseband chip and the interfaces of the SIM card to switch among the transparent transmission mode, the transparent transmission monitoring mode and the transfer mode according to the first control signal, the second control signal or the third control signal.
And an analog switch supporting connection with the slave baseband chip data interface (TDS _ DIO), the master baseband chip second interface (SIMS _ DIO), the master baseband chip first interface (SIMM _ DIO), and the SIM card data interface (SIM _ DIO). And switching the connection relation among the interfaces between three modes according to a control signal from the control module, so as to realize the multiplexing of the SIM card between the main baseband chip and the slave baseband chip. The analog switch may specifically employ a 2-to-2 multiplexer.
Since the multimode terminal provides three operating modes: a transit mode, a transparent transmission mode and a transparent transmission listening mode, and therefore, in practice, the function of the analog switch is to switch the connection relationship between the respective interfaces between the three modes, and for this purpose, in a preferred embodiment,
the analog switch is used for connecting the first interface of the main baseband chip with the SIM card data interface in a transfer mode to realize that the main baseband chip accesses the SIM card through the analog switch, and connecting the data interface of the slave baseband chip with the second interface of the main baseband chip to realize that the slave baseband chip accesses the SIM card through the main baseband chip;
in a transparent transmission mode, a data interface of the slave baseband chip is connected and conducted with a data interface of the SIM card, so that the slave baseband chip is directly communicated with the SIM card, and the master baseband chip is controlled to enter a sleep state;
and in the transparent transmission monitoring mode, the second interface of the master baseband chip is conducted with the data interface of the slave baseband chip and the first interface of the master baseband chip, and the communication between the slave baseband chip and the SIM card is monitored through the second interface of the master baseband chip.
And the control module of the main baseband chip controls the data trend of the multiplexer through the control signal according to the mode. The multimode terminal provides three operating modes: a transit mode, a transparent transmission mode and a transparent transmission monitoring mode.
In a preferred embodiment, the multiplexer is configured to switch the signal line of the SIM card between the master baseband chip and the slave baseband chip according to the first control signal, the second control signal, or the third control signal.
The multiplexer includes a first multiplexer, a second multiplexer, and a third multiplexer, wherein,
the first multiplexer is used for multiplexing a signal line of a clock signal of the SIM card; connecting a signal line of a clock signal of the master baseband chip to a signal line of a clock signal of the SIM card, and connecting a signal line of a clock signal of the slave baseband chip to a signal line of a clock signal of the SIM card;
the second multiplexer is used for multiplexing the signal line of the reset signal of the SIM card; connecting a signal line of a reset signal of the master baseband chip to a signal line of a reset signal of the SIM card, and connecting a signal line of a reset signal of the slave baseband chip to a signal line of a reset signal of the SIM card;
the third multiplexer is used for multiplexing signal lines of voltage signals of the SIM card; the signal line of the voltage signal of the master baseband chip is connected to the signal line of the voltage signal of the SIM card, and the signal line of the voltage signal of the slave baseband chip is connected to the signal line of the voltage signal of the SIM card.
In a preferred embodiment of the present invention,
the first multiplexer is used for multiplexing a signal line of a clock signal of the main baseband chip to a signal line of a clock signal of the SIM card in a transfer mode;
the second multiplexer is used for multiplexing the signal line of the reset signal of the main baseband chip to the signal line of the reset signal of the SIM card according to the control signal in a transfer mode;
and the third multiplexer is used for multiplexing the signal line of the voltage signal of the main baseband chip to the signal line of the voltage signal of the SIM card according to the control signal in the transfer mode.
In a preferred embodiment of the present invention,
the first multiplexer is used for multiplexing a signal line of a clock signal of the baseband chip to a signal line of a clock signal of the SIM card in a transparent transmission mode;
the second multiplexer is used for multiplexing the signal line of the reset signal of the baseband chip to the signal line of the reset signal of the SIM card in a transparent transmission mode;
and the third multiplexer is used for multiplexing the signal line of the voltage signal of the baseband chip to the signal line of the voltage signal of the SIM card in the transparent transmission mode.
The first multiplexer is used for multiplexing a signal line of a clock signal of the baseband chip to a signal line of a clock signal of the SIM card in a transparent transmission monitoring mode;
the second multiplexer is used for multiplexing the signal line of the reset signal of the baseband chip to the signal line of the reset signal of the SIM card in a transparent transmission monitoring mode;
and the third multiplexer is used for multiplexing the signal wire of the voltage signal of the baseband chip to the signal wire of the voltage signal of the SIM card in the transparent transmission monitoring mode.
The multiplexers may specifically be ordinary 2-to-1 multiplexers.
In a preferred embodiment, the control module further comprises:
and the application protocol data judging unit is used for sending a third control signal to the analog switch to switch the analog switch to a transfer mode after finding that the communication of one application protocol data unit is completed in the transparent transmission monitoring mode.
And the control module is also used for sending a control signal to switch the analog switch to a transparent transmission mode when the main baseband chip does not access the SIM card.
In one application scenario, as shown in fig. 4, the method includes:
in the initial state, the application processor sends a starting signal to start the main baseband chip, and the main baseband chip executes the initialization process of the SIM card. According to the standard protocol of the smart card, the initialization process involves the transmission of several signals, VCC (voltage signal), CLK (clock signal), RST (reset signal) and DIO (IO signal).
And the application processor sends a starting signal to start the TDS of the slave baseband chip.
After the slave baseband chip TDS and the master baseband chip TDL are both started, as shown in fig. 5, the transfer mode can be entered.
In the transfer mode, the analog switch connects SIMM _ DIO with SIM _ DIO to enable the main baseband chip to access the SIM card through the analog switch, and the analog switch connects TDS _ DIO with SIMs _ DIO to enable the slave baseband chip to access the SIM card through forwarding of the main baseband chip, so that the main baseband chip and the slave baseband chip can access the SIM card concurrently, i.e., communicate with the SIM card simultaneously.
As shown in fig. 6, when the main baseband chip TDL does not need to access the SIM card, the control module sends a control signal to switch the analog switch to the transparent transmission mode in order to save power consumption.
In the transparent transmission mode, the analog switch conducts the connection between TDS _ DIO and SIM _ DIO, the slave baseband chip directly communicates with the SIM card, and the master baseband chip enters a sleep state to save power consumption.
As shown in fig. 7, when the main baseband chip needs to access the SIM card again, it is necessary to switch from the transparent transmission mode to the relay mode, and in this process, according to the technology provided by the embodiment of the present invention, it is necessary to pass through the transparent transmission monitoring mode and then switch to the relay mode, including:
the main baseband chip is awakened, the control module in the main baseband chip sends a control signal, the control signal switches the analog switch to a transparent transmission monitoring mode, under the transparent transmission monitoring mode, the analog switch conducts buses of SIMS _ DIO, TDS _ DIO and SIM _ DIO, the second interface of the main baseband chip monitors communication between the slave baseband chip and the SIM card, after finding that the communication of an APDU is completed, the control module of the main baseband chip sends the control signal, and the analog switch is switched to a transfer mode immediately. In the transparent transmission monitoring mode, the SIM _ DIO and the SIMS _ DIO are connected together through the analog switch, so that the communication between the TDS _ DIO and the SIM _ DIO can be monitored by the SIMS _ DIO positioned in the main baseband chip, and when the main baseband chip finds that the communication of one APDU is completed, the control module of the main baseband chip sends out a control signal to immediately switch the analog switch to the transfer mode.
The advantages after adopting this scheme are: the safe switching from the transparent transmission mode to the transfer mode is realized by using the transparent transmission monitoring mode, the risk of communication damage is avoided, and the terminal equipment can automatically switch the mode of sharing the SIM card by the multiple baseband chips according to an application scene so as to reduce the power consumption.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A multi-mode mobile terminal, comprising: the system comprises a master baseband chip, a slave baseband chip, a multiplexing unit and an SIM card; wherein,
the main baseband chip comprises a control module;
the control module is used for sending a first control signal for switching from the transit mode to the transparent transmission mode to the multiplexing unit in the transit mode,
and in the transparent transmission mode, sending a second control signal for switching from the transparent transmission mode to the transparent transmission monitoring mode to the multiplexing unit, wherein in the transparent transmission monitoring mode, a second interface of the master baseband chip is conducted with a data interface of the slave baseband chip and a first interface of the master baseband chip, the second interface of the master baseband chip monitors the communication between the slave baseband chip and the SIM card, the slave baseband chip and the SIM card carry out direct communication, the communication can be monitored by the master baseband chip, and the master baseband chip determines the time for finishing the communication between the slave baseband chip and the SIM card by monitoring;
and sending a third control signal for switching from the transparent transmission monitoring mode to the transfer mode to the multiplexing unit in the transparent transmission monitoring mode;
the multiplexing unit is used for controlling the slave baseband chip to directly communicate with the SIM card according to a first control signal; controlling the master baseband chip to monitor the communication between the slave baseband chip and the SIM card according to a second control signal; and controlling the master baseband chip and the slave baseband chip to access the SIM card concurrently according to a third control signal.
2. The multi-mode mobile terminal of claim 1, further comprising:
the application processor is used for sending a starting signal to start the main baseband chip and initializing the main baseband chip; and sending a starting signal to start the slave baseband chip and initializing the slave baseband chip.
3. The multimode mobile terminal of claim 1,
the multiplexing unit includes: an analog switch and a multiplexer; wherein,
the multiplexer includes a first multiplexer, a second multiplexer, and a third multiplexer.
4. The multi-mode mobile terminal of claim 3,
and the analog switch is used for executing the connection relation among different interfaces of the main baseband chip, the interfaces of the slave baseband chip and the interfaces of the SIM card to switch among the transparent transmission mode, the transparent transmission monitoring mode and the transfer mode according to the first control signal, the second control signal or the third control signal.
5. Multimode mobile terminal according to claim 3 or 4,
the analog switch is specifically used for connecting a first interface of the main baseband chip with a data interface of the SIM card in a transfer mode to realize that the main baseband chip accesses the SIM card through the analog switch, and connecting a data interface of the slave baseband chip with a second interface of the main baseband chip to realize that the slave baseband chip accesses the SIM card through the main baseband chip;
and in the transparent transmission mode, the data interface of the slave baseband chip is connected and communicated with the data interface of the SIM card, so that the slave baseband chip is directly communicated with the SIM card, and the master baseband chip is controlled to enter a sleep state.
6. The multi-mode mobile terminal of claim 3,
and the multiplexer is used for switching the signal line of the SIM card between the master baseband chip and the slave baseband chip according to the first control signal, the second control signal or the third control signal.
7. The multi-mode mobile terminal of claim 6,
the first multiplexer is used for multiplexing a signal line of a clock signal of the main baseband chip to a signal line of a clock signal of the SIM card in a transfer mode;
the second multiplexer is used for multiplexing the signal line of the reset signal of the main baseband chip to the signal line of the reset signal of the SIM card according to the control signal in a transfer mode;
and the third multiplexer is used for multiplexing the signal line of the voltage signal of the main baseband chip to the signal line of the voltage signal of the SIM card according to the control signal in the transfer mode.
8. The multi-mode mobile terminal of claim 6,
the first multiplexer is used for multiplexing a signal line of a clock signal of the baseband chip to a signal line of a clock signal of the SIM card in a transparent transmission mode;
the second multiplexer is used for multiplexing the signal line of the reset signal of the baseband chip to the signal line of the reset signal of the SIM card in a transparent transmission mode;
and the third multiplexer is used for multiplexing the signal line of the voltage signal of the baseband chip to the signal line of the voltage signal of the SIM card in the transparent transmission mode.
9. The multi-mode mobile terminal of claim 6,
the first multiplexer is used for multiplexing a signal line of a clock signal of the baseband chip to a signal line of a clock signal of the SIM card in a transparent transmission monitoring mode;
the second multiplexer is used for multiplexing the signal line of the reset signal of the baseband chip to the signal line of the reset signal of the SIM card in a transparent transmission monitoring mode;
and the third multiplexer is used for multiplexing the signal wire of the voltage signal of the baseband chip to the signal wire of the voltage signal of the SIM card in the transparent transmission monitoring mode.
10. The multi-mode mobile terminal of claim 1, wherein the control module further comprises:
and the application protocol data judging unit is used for sending a third control signal to the analog switch to switch the analog switch to a transfer mode after finding that the communication of one application protocol data unit is completed in the transparent transmission monitoring mode.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101945502A (en) * | 2010-09-03 | 2011-01-12 | 展讯通信（上海）有限公司 | Single-card dual-mode terminal and communication method thereof |
| CN102223735A (en) * | 2011-05-30 | 2011-10-19 | 北京创毅视讯科技有限公司 | Method and equipment for multi-baseband chips to share and access smart card |
| CN202261828U (en) * | 2011-05-30 | 2012-05-30 | 北京创毅视讯科技有限公司 | Apparatus for intelligent card shared access of multiple base-band chips |
| CN102957788A (en) * | 2011-08-26 | 2013-03-06 | 中国电信股份有限公司 | Method for reading and writing card of mobile terminal with double base-band chips |
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| US20070171878A1 (en) * | 2001-12-21 | 2007-07-26 | Novatel Wireless, Inc. | Systems and methods for a multi-mode wireless modem |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945502A (en) * | 2010-09-03 | 2011-01-12 | 展讯通信（上海）有限公司 | Single-card dual-mode terminal and communication method thereof |
| CN102223735A (en) * | 2011-05-30 | 2011-10-19 | 北京创毅视讯科技有限公司 | Method and equipment for multi-baseband chips to share and access smart card |
| CN202261828U (en) * | 2011-05-30 | 2012-05-30 | 北京创毅视讯科技有限公司 | Apparatus for intelligent card shared access of multiple base-band chips |
| CN102957788A (en) * | 2011-08-26 | 2013-03-06 | 中国电信股份有限公司 | Method for reading and writing card of mobile terminal with double base-band chips |
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