CN112073999A - Communication terminal, vehicle-mounted terminal and network switching method thereof - Google Patents
Communication terminal, vehicle-mounted terminal and network switching method thereof Download PDFInfo
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- CN112073999A CN112073999A CN202010859147.1A CN202010859147A CN112073999A CN 112073999 A CN112073999 A CN 112073999A CN 202010859147 A CN202010859147 A CN 202010859147A CN 112073999 A CN112073999 A CN 112073999A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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Abstract
The invention discloses a communication terminal, a vehicle-mounted terminal and a network switching method thereof, wherein the communication terminal comprises a main control circuit, a first communication circuit and a second communication circuit, wherein the first communication circuit and the second communication circuit are respectively electrically connected with the main control circuit, the first communication circuit is used for mounting at least one first SIM card, the second communication circuit is used for mounting at least one second SIM card of which the network is different from that of the first SIM card, and the main control circuit is used for switching data transmitted by the first SIM card to be transmitted by the second SIM card when the signal intensity of the first SIM card is continuously weakened or the signal intensity of the first SIM card is smaller than that of the second SIM card. Therefore, the communication terminal can transmit data based on the optimal network at any time, network switching is realized, and the phenomenon of blocking in the data transmission process is avoided.
Description
Technical Field
The invention relates to the field of intelligent communication, in particular to a communication terminal, a vehicle-mounted terminal and a network switching method thereof.
Background
As is known, the coverage of a mobile network is always not uniform, and in places where people are concentrated, the deployment of the mobile network is concentrated, and network quality operators also can make key guarantees, so that the quality of large operators in remote areas such as suburbs, villages, farms and the like is uneven.
Some areas have better mobile coverage and some have better telecommunication coverage. This situation can cause unstable data transmission of the mobile device due to fluctuation of the operating network. For example. The vehicle-mounted terminal passes through the Unicom 3G, the Mobile 4G and the telecom 5G in sequence in the process of traveling, and if the terminal equipment is only provided with a card of a specified operator in the conventional situation, data transmission is blocked due to insufficient coverage of the operation network in the process of traveling.
Disclosure of Invention
The invention provides a communication terminal, a vehicle-mounted terminal and a network switching method thereof, which can enable the communication terminal to transmit data based on an optimal network at any time, realize network switching and avoid the phenomenon of blocking in the data transmission process.
In order to solve the above technical problems, a first technical solution provided by the present invention is: the communication terminal comprises a main control circuit, a first communication circuit and a second communication circuit, wherein the first communication circuit and the second communication circuit are respectively electrically connected with the main control circuit, the first communication circuit is used for mounting at least one first SIM card, the second communication circuit is used for mounting at least one second SIM card of a network different from the first SIM card, and the main control circuit is used for switching data transmitted through the first SIM card to be transmitted through the second SIM card when the fact that the signal intensity of the first SIM card is continuously weakened or the signal intensity of the first SIM card is smaller than that of the second SIM card is detected.
When the main control circuit detects that the signal intensity of the first SIM card is continuously weakened or the signal intensity of the first SIM card is smaller than that of the second SIM card, the main control circuit controls the second communication circuit to select the second SIM card with the optimal signal intensity, switches the data transmitted through the first SIM card to the second SIM card for transmission, and cuts off the data transmission of the first SIM card when a stable transmission instruction of the second SIM card is detected.
The first communication circuit further comprises a first gating switch, the fixed end of the first gating switch is connected with the first communication circuit, the free end of the first gating switch is used for being connected with the first SIM card selected by the main control circuit, and the first SIM card selected by the main control circuit is the SIM card with the strongest signal intensity and mounted on the first communication circuit.
The second communication circuit further comprises a second gating switch, the fixed end of the second gating switch is connected with the second communication circuit, the free end of the second gating switch is used for being connected with a second SIM card selected by the main control circuit, and the second SIM card selected by the main control circuit is the SIM card with the strongest signal intensity and mounted on the second communication circuit.
Wherein the first SIM card and the second SIM card support any one of 3G, 4G and 5G network modes.
The first communication circuit and the second communication circuit can mount the mobile SIM card, the communication SIM card and the telecommunication SIM card at the same time.
The second technical solution provided by the present invention does not solve the above technical problems: a network switching method is provided, and the method comprises the following steps: the main control circuit detects the signal intensity of a first SIM card mounted on a first communication circuit; if the signal intensity of the first SIM card is detected to be continuously weakened or the signal intensity of the first SIM card is smaller than that of the second SIM card, the main control circuit switches the data transmitted by the first SIM card to the second SIM card mounted on the second communication circuit for transmission; the second SIM card is a SIM card which is mounted by the second communication circuit and has a network different from that of the first SIM card.
Wherein, main control circuit still includes before detecting the signal strength of the first SIM card of first communication circuit mount: the main control circuit detects the signal intensity of the SIM card of the first communication circuit, and selects the SIM card with the optimal signal intensity as the first SIM card; the main control circuit utilizes the first SIM card mounted by the first communication circuit to transmit data.
Wherein, the main control circuit further comprises after the data transmission by using the first SIM card mounted by the first communication circuit: the master control circuit detects the signal intensity of a second SIM card which is mounted on a second communication circuit and is different from the first SIM card in network; and when receiving the switching instruction, the second communication circuit selects the SIM card with the strongest signal strength from the second SIM cards and stably connects the SIM cards.
Wherein, if it is detected that the signal intensity of the first SIM card is continuously weakened, or the signal intensity of the first SIM card is smaller than the signal intensity of the second SIM card, the main control circuit switches the data transmitted through the first SIM card to the second SIM card mounted on the second communication circuit for transmission, including: if the signal intensity of the first SIM card is detected to be continuously weakened or the signal intensity of the first SIM card is smaller than that of the second SIM card, the main control circuit sends a switching signal to the second communication circuit; switching the data transmitted by the first SIM card to a second SIM card which is stably connected with a second communication circuit for transmission; and cutting off the data transmission of the first SIM card when the second SIM card transmission stable instruction is detected.
The detecting, by the master control circuit, the signal strength of the second SIM card, which is mounted on the second communication circuit and is in a different network from the first SIM card, specifically includes: the second communication circuit is sequentially connected with different second SIM cards, and detects and searches a network corresponding to the SIM card during each connection; if receiving a switching instruction, stopping detection by the second communication circuit, and selecting a second SIM card with the strongest signal intensity for stable connection; if the switching instruction is not received, returning to the step: and connecting different second SIM cards in sequence, and detecting and searching a network corresponding to the SIM card during each connection.
Wherein the first SIM card and the second SIM card support any one of 3G, 4G and 5G network modes.
The first communication circuit and the second communication circuit can mount the mobile SIM card, the communication SIM card and the telecommunication SIM card at the same time.
In order to solve the above technical problems, a third technical solution provided by the present invention is: there is provided a vehicle-mounted terminal including the communication terminal of any one of the above.
The beneficial effects of the invention are different from the prior art, the invention provides a communication terminal, a vehicle-mounted terminal and a network switching method thereof, wherein the communication terminal comprises: the main control circuit is used for mounting at least one first SIM card, the second communication circuit is used for mounting at least one second SIM card of a network different from the first SIM card, and the main control circuit is used for switching data transmitted through the first SIM card to be transmitted through the second SIM card when the fact that the signal intensity of the first SIM card is continuously weakened or the signal intensity of the first SIM card is smaller than that of the second SIM card is detected. Therefore, the communication terminal can transmit data based on the optimal network at any time, network switching is realized, and the phenomenon of blocking in the data transmission process is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic structural diagram of a communication terminal according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a network handover method according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a network handover method according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating a network handover method according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of an embodiment of the vehicle-mounted terminal of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Please refer to fig. 1, which is a schematic structural diagram of a communication terminal according to an embodiment of the present invention. Specifically, the communication terminal provided by the present invention includes: a main control circuit 11, a first communication circuit 12 and a second communication circuit 13.
The first communication circuit 12 and the second communication circuit 13 are connected to the main control circuit 11. Specifically, the first communication circuit 12 is configured to mount at least one first SIM card, and the second communication circuit 13 is configured to mount at least one second SIM card of a network different from the first SIM card.
Specifically, please refer to fig. 1, wherein the first communication circuit 12 mounts three SIM cards 14, and the second communication circuit 13 mounts three SIM cards 15. In a specific embodiment, the first communication circuit 12 can mount a universal SIM card, a telecommunication SIM card and a mobile SIM card, and the second communication circuit 13 can also mount a universal SIM card, a telecommunication SIM card and a mobile SIM card. In a specific application, the first communication circuit 12 and the second communication circuit 13 both intelligently activate a SIM card at the time of agreement. A
For example, in an embodiment, if the SIM card currently activated by the first communication circuit 12 is a connected SIM card, the connected SIM card is used as the first SIM card, and the second communication circuit 13 may activate any one of a telecommunications SIM card and a mobile SIM card other than the connected SIM card, and use any one of the telecommunications SIM card and the mobile SIM card as the second SIM card. For another example, if the currently activated SIM card of the first communication circuit 12 is a mobile SIM card, the mobile SIM card is used as the first SIM card, and the second communication circuit 13 may activate any one of a telecommunication SIM card and a communication SIM card other than the mobile SIM card, and use any one of the telecommunication SIM card and the communication SIM card as the second SIM card.
Specifically, in an embodiment, if the first SIM card currently started by the first communication circuit 12 is a connected SIM card and data transmission is performed by using the connected SIM card, the main control circuit 11 is configured to detect the signal strength of the first SIM card, and switch the data transmitted through the first SIM card to be transmitted through the second SIM card when detecting that the signal strength of the first SIM card is continuously weakened or the signal strength of the first SIM card is smaller than the signal strength of the second SIM card.
Specifically, in another embodiment, if it is detected that the signal strength of the first SIM card is less than the signal strength of the second SIM card, it may further be detected whether the available bandwidth of the second SIM card is greater than the required bandwidth of the first SIM card, and if the available bandwidth of the second SIM card is greater than the required bandwidth of the first SIM card, the data transmitted through the first SIM card is switched to be transmitted through the second SIM card.
Specifically, when data transmission switching is performed, the main control circuit 11 detects that the signal intensity of the first SIM card is continuously weakened, or the signal intensity of the first SIM card is smaller than the signal intensity of the second SIM card, controls the second communication circuit 13 to select the second SIM card with the optimal signal intensity, switches the data transmitted through the first SIM card to be transmitted through the second SIM card, and cuts off the data transmission of the first SIM card when a stable transmission instruction of the second SIM card is detected. Specifically, the second communication circuit 13 detects the signal strength of the second SIM cards other than the first SIM card mounted thereon at any time.
For example, if the first communication circuit 12 uses a universal SIM card for data transmission currently, the second communication circuit 13 detects the signal strength of the mobile SIM card and the telecommunication SIM card at any time. If the signal strength of the mobile SIM card is continuously weakened, or the signal strength of the mobile SIM card is smaller than the signal strength of the mobile SIM card and/or the telecommunication SIM card, the second communication circuit 13 selects and stably drives the SIM card with the optimal signal strength from the mobile SIM card and the telecommunication SIM card, and at this time, the main control circuit 11 switches the data transmitted through the mobile SIM card to be transmitted through the mobile SIM card and/or the telecommunication SIM card (the SIM card with the optimal signal strength). Specifically, the data transmission of the mobile SIM card is cut off when the switching is completed and a stable instruction transmitted by the mobile SIM card and/or the telecommunication SIM card (SIM card with optimal signal strength) is detected.
Specifically, the first communication circuit 12 further includes a first gating switch 121, a fixed end of the first gating switch 121 is connected to the first communication circuit 12, and a free end of the first gating switch 121 is used for connecting to the first SIM card selected by the main control circuit 11. The first SIM card selected by the main control circuit 11 is the SIM card with the strongest signal intensity mounted on the first communication circuit 12. For example, if the signal strength of the telecommunication SIM card is strongest, the free end of the first gating switch 121 is connected to the telecommunication SIM card, and if the signal strength of the connected SIM card is strongest, the free end of the first gating switch 121 is connected to the connected SIM card.
The second communication circuit 13 further includes a second gating switch 131, a fixed end of the second gating switch 131 is connected to the second communication circuit 13, and a free end of the second gating switch 131 is used for connecting to the second SIM card selected by the main control circuit 11. The second SIM card selected by the main control circuit 11 is the SIM card with the strongest signal intensity mounted on the second communication circuit 13. For example, if the first SIM card connected to the first gating switch 121 is a mobile SIM card, and the signal strength of the connected SIM card is strongest with the connected SIM card in the telecommunication SIM cards, the free end of the second gating switch 131 is connected to the connected SIM card; if the first SIM card connected to the first gating switch 121 is a connected SIM card, and the signal strength of the mobile SIM card is the strongest among the mobile SIM card and the telecommunication SIM card, the free end of the second gating switch 131 is connected to the mobile SIM card.
In an embodiment of the present invention, the first SIM card and the second SIM card support any one of 3G, 4G and 5G network modes. It can implement network switching no matter in what network mode.
The communication terminal provided by the invention can load 6 SIM cards, including two communicated SIM cards, two mobile SIM cards and two telecommunication SIM cards, and the SIM cards of different operators are connected by different communication circuits, so that the communication terminal can transmit data based on an optimal network at any time, network switching is realized, and the phenomenon of unsmooth card in the data transmission process is avoided.
Fig. 2 is a flowchart illustrating a network handover method according to a first embodiment of the present invention. The method comprises the following steps:
step S21: the main control circuit detects the signal intensity of the first SIM card mounted on the first communication circuit.
Specifically, if the first SIM card mounted by the first communication circuit and being started is a mobile SIM card, the main control circuit detects the signal intensity of the mobile SIM card; if the first SIM card which is mounted by the first communication circuit and is started is a communicated SIM card, the main control circuit detects the signal intensity of the communicated SIM card; if the first SIM card which is mounted by the first communication circuit and is started is a telecommunication SIM card, the main control circuit detects the signal intensity of the telecommunication SIM card.
Step S22: and if the signal intensity of the first SIM card is detected to be continuously weakened or the signal intensity of the first SIM card is smaller than that of the second SIM card, the main control circuit switches the data transmitted by the first SIM card to the second SIM card mounted on the second communication circuit for transmission.
Specifically, the second SIM card is a SIM card of a network different from the first SIM card and mounted on the second communication circuit. If the first SIM card which is mounted by the first communication circuit and is started is the mobile SIM card, the second communication circuit which is mounted and started is the communication SIM card or the telecommunication SIM card. The main control circuit detects the signal intensity of the mobile SIM card; if the signal intensity of the mobile SIM card is continuously weakened or the signal intensity of the mobile SIM card is smaller than the signal intensity of the communication SIM card or the telecommunication SIM card, the main control circuit switches the data transmitted by the first SIM card (the mobile SIM card) to the second SIM card (the communication SIM card or the telecommunication SIM card) mounted on the second communication circuit for transmission. Specifically, in another embodiment, if the signal strength of the mobile SIM card is less than the signal strength of the connected SIM card or the telecommunication SIM card, it may further be detected whether the available bandwidth of the connected SIM card or the telecommunication SIM card is greater than the required bandwidth of the mobile SIM card, and if so, the main control circuit switches the data transmitted through the first SIM card (mobile SIM card) to the second SIM card (connected SIM card or telecommunication SIM card) mounted by the second communication circuit for transmission.
The network switching method provided by the invention can switch the data being transmitted by the first communication circuit by using the first SIM card to the second communication circuit so as to enable the second communication circuit to transmit the data by using the second SIM card. Therefore, the communication terminal can transmit data based on the optimal network at any time, network switching is realized, and the phenomenon of blocking in the data transmission process is avoided.
Referring to fig. 3, a flowchart of a network handover method according to a second embodiment of the present invention is shown, wherein steps S33 and S34 are the same as those of the first embodiment shown in fig. 2, except that the embodiment further includes, before step S33:
step S31: the main control circuit detects the signal intensity of the SIM card of the first communication circuit, and selects the SIM card with the optimal signal intensity as the first SIM card.
Specifically, the main control circuit controls the first communication circuit to sequentially detect the signal intensity of the SIM card, and selects the SIM card with the optimal signal intensity as the first SIM card.
For example, the main control circuit controls the first communication circuit to connect and start the mobile SIM card, detects the signal intensity of the mobile SIM card and records the mobile signal intensity data; then connecting and starting the telecommunication SIM card, detecting the signal intensity of the telecommunication SIM card and recording the telecommunication signal intensity data; and finally, connecting and starting the connected SIM card, detecting the signal intensity of the connected SIM card and recording the data of the connected signal intensity. And selecting the corresponding SIM card with the strongest signal strength from the mobile signal strength data, the telecommunication signal strength data and the Unicom signal strength data as the first SIM card for data transmission.
In another embodiment, the first communication circuit and the second communication circuit can be controlled by the master control circuit to simultaneously detect the signal strength of the SIM card based on the idea of saving detection time. For example, the first communication circuit detects the signal strength of the mobile SIM card and records the mobile signal strength data, the main control circuit detects the signal strength of the telecommunication SIM card and records the telecommunication signal strength data, and finally the first communication circuit/the main control circuit detects the signal strength of the connected SIM card and records the connected signal strength data.
Step S32: the main control circuit utilizes the first SIM card mounted by the first communication circuit to transmit data.
After the master control circuit selects the SIM card with the strongest signal intensity, the SIM card is used as a first SIM card, and the master control circuit carries out data transmission by utilizing the first SIM card mounted on the first communication circuit.
The network switching method provided by the invention can switch the data being transmitted by the first communication circuit by using the first SIM card to the second communication circuit so as to enable the second communication circuit to transmit the data by using the second SIM card. Therefore, the communication terminal can transmit data based on the optimal network at any time, network switching is realized, and the phenomenon of blocking in the data transmission process is avoided.
Fig. 4 is a flowchart illustrating a network handover method according to a third embodiment of the present invention. Step S41, step S42 and step S43 are the same as step S31, step S32 and step S33 in the second embodiment shown in fig. 3, except that the embodiment further includes:
step S44: the main control circuit detects the signal intensity of a second SIM card which is mounted by a second communication circuit and is different from the first SIM card in network.
Specifically, in an embodiment, the step S44 is performed simultaneously with the step S43, that is, after the main control circuit selects the first SIM card for data transmission, the main control circuit detects the first SIM card mounted on the first communication circuit, and at the same time, the main control circuit detects the signal strength of the second SIM card mounted on the second communication circuit and in a network different from the first SIM card.
For example, if the first communication circuit transmits data by using the mobile SIM card, the main control circuit detects the signal intensity of the mobile SIM card and records the mobile signal intensity data during the data transmission process. And in the data transmission process, the main control circuit detects the signal intensity of the connected SIM card and the telecommunication SIM card mounted on the second communication circuit and records the connected signal intensity data and the telecommunication signal intensity data.
Specifically, in an embodiment, the second communication circuit sequentially connects different second SIM cards, and detects and searches for a network corresponding to the SIM card in each connection. For example, the second communication circuit is connected with the connected SIM card first, detects the signal strength of the connected SIM card and records the data of the connected signal strength, and then detects the signal strength of the telecommunication SIM card and records the data of the telecommunication signal strength, thereby selecting the SIM card with the strongest signal strength. The second communication circuit is continuously in the detection state when the switching instruction is not accepted.
In another embodiment, two second SIM cards in the second communication circuit may be numbered, for example, the number of the unicom SIM card is 1, the number of the telecom SIM card is 2, and a condition that n is n% 2 is set, where n is the number of the SIM card. And the second communication circuit selects to switch the communication SIM card and the telecommunication SIM card according to the condition to detect signals.
And if the switching instruction is received, the second communication circuit stops detecting and selects the second SIM card with the strongest signal intensity to be stably connected. Specifically, when a switching instruction is received, that is, it is detected that the signal strength of the first SIM card is continuously weakened or the signal strength of the first SIM card is smaller than the signal strength of the second SIM card, the second communication circuit stops detecting, and selects the second SIM card with the strongest signal strength from the recorded data of the signal strength of the connected signal and the data of the signal strength of the telecommunication signal to be stably connected to wait for switching of data transmission. If the switching instruction is not received, that is, the signal intensity of the first SIM card is not detected to be continuously weakened, or the signal intensity of the first SIM card is smaller than that of the second SIM card, the second communication circuit is continuously in a detection state.
Step S45: and if the fact that the signal intensity of the first SIM card is continuously weakened or the signal intensity of the first SIM card is smaller than the signal intensity of the second SIM card is detected, the main control circuit sends a switching signal to the second communication circuit.
Specifically, when it is detected that the signal strength of the first SIM card is continuously weakened or the signal strength of the first SIM card is smaller than the signal strength of the second SIM card, a switching signal is sent to the second communication circuit, the second communication circuit stops detecting, and the second SIM card with the strongest signal strength is selected from the recorded data of the communication signal strength and the data of the telecommunication signal strength to be stably connected to wait for switching of data transmission.
Step S46: and when receiving the switching instruction, the second communication circuit selects the SIM card with the strongest signal strength from the second SIM cards and stably connects the SIM cards.
Specifically, after the second communication circuit selects the SIM card with the strongest signal strength from the second SIM cards and performs stable connection, a data transmission channel between the first communication circuit and the second communication circuit is established, so that transmission data can be transmitted by using the second SIM card. If the data transmission channel is not established successfully in a short time, the mobile terminal can wait for the moving time until the data transmission channel is established successfully.
Step S47: and switching the data transmitted by the first SIM card to a second SIM card which is stably connected with the second communication circuit for transmission.
And the main control circuit controls the data transmitted by the first SIM card to be switched to a second SIM card which is stably connected with the second communication circuit for transmission through a data transmission channel.
Step S48: and cutting off the data transmission of the first SIM card when a second SIM card transmission stable instruction is detected.
Specifically, when it is detected that the second SIM card can stably transmit, the data transmission of the first SIM card is cut off. And the first communication circuit is switched to the second communication circuit and the second communication circuit is switched to the first communication circuit, where the network switching method shown in fig. 2-4 is performed.
The first SIM card and the second SIM card support any one of 3G, 4G, and 5G network modes. It can implement network switching no matter in what network mode.
The network switching method provided by the invention can switch the data being transmitted by the first communication circuit by using the first SIM card to the second communication circuit so as to enable the second communication circuit to transmit the data by using the second SIM card. Therefore, the communication terminal can transmit data based on the optimal network at any time, network switching is realized, and the phenomenon of blocking in the data transmission process is avoided.
Fig. 5 is a schematic structural diagram of a vehicle-mounted terminal according to an embodiment of the invention. Specifically, the in-vehicle terminal 51 includes a communication terminal 52, the communication terminal 52 is the communication terminal shown in fig. 1, and the communication terminal 52 can implement the network switching method shown in any one of the embodiments of fig. 2 to 4.
By the method, unstable network data transmission caused by the change of the coverage range of the base station in the traveling distance of the vehicle-mounted terminal can be avoided, so that the vehicle-mounted terminal can transmit data based on the optimal network at any time, network switching is realized, and the phenomenon of blocking and pausing of data transmission in the traveling process is avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (14)
1. A communication terminal is characterized by comprising a main control circuit, a first communication circuit and a second communication circuit, wherein the first communication circuit and the second communication circuit are respectively electrically connected with the main control circuit, the first communication circuit is used for mounting at least one first SIM card, the second communication circuit is used for mounting at least one second SIM card of a network different from the first SIM card,
the main control circuit is used for switching the data transmitted by the first SIM card to be transmitted by the second SIM card when detecting that the signal intensity of the first SIM card is continuously weakened or the signal intensity of the first SIM card is smaller than the signal intensity of the second SIM card.
2. The communication terminal according to claim 1, wherein when the main control circuit detects that the signal strength of the first SIM card is continuously weakened or the signal strength of the first SIM card is smaller than the signal strength of the second SIM card, the main control circuit controls the second communication circuit to select the second SIM card with the optimal signal strength, switches the data transmitted through the first SIM card to be transmitted through the second SIM card, and cuts off the data transmission of the first SIM card when detecting that the second SIM card transmits a stable instruction.
3. The communication terminal according to claim 1, wherein the first communication circuit further comprises a first gating switch, a fixed end of the first gating switch is connected to the first communication circuit, and a free end of the first gating switch is used for connecting the first SIM card selected by the main control circuit, wherein the first SIM card selected by the main control circuit is the SIM card with the strongest signal intensity mounted on the first communication circuit.
4. The communication terminal according to any one of claims 1 to 3, wherein the second communication circuit further comprises a second gating switch, a fixed end of the second gating switch is connected to the second communication circuit, and a free end of the second gating switch is used for connecting the second SIM card selected by the main control circuit, wherein the second SIM card selected by the main control circuit is the SIM card with the strongest signal intensity mounted on the second communication circuit.
5. The communication terminal of claim 1, wherein the first SIM card and the second SIM card support any one of 3G, 4G, and 5G network modes.
6. The communication terminal of claim 1, wherein the first communication circuit and the second communication circuit can mount a mobile SIM card, a universal SIM card and a telecommunication SIM card simultaneously.
7. A method for network handover, the method comprising:
the main control circuit detects the signal intensity of a first SIM card mounted on a first communication circuit;
if the signal intensity of the first SIM card is detected to be continuously weakened or the signal intensity of the first SIM card is smaller than the signal intensity of a second SIM card, the main control circuit switches the data transmitted by the first SIM card to the second SIM card mounted on the second communication circuit for transmission;
the second SIM card is a SIM card which is mounted by a second communication circuit and has a network different from that of the first SIM card.
8. The network switching method according to claim 7, wherein before the main control circuit detects the signal strength of the first SIM card mounted on the first communication circuit, the method further comprises:
the master control circuit detects the signal intensity of the SIM card of the first communication circuit, and selects the SIM card with the optimal signal intensity as the first SIM card;
and the main control circuit transmits data by using the first SIM card mounted on the first communication circuit.
9. The network switching method according to claim 7, wherein after the data transmission by the master circuit using the first SIM card mounted by the first communication circuit, further comprising:
the master control circuit detects the signal intensity of a second SIM card which is mounted on a second communication circuit and is different from the first SIM card in network;
and when a switching instruction is received, the second communication circuit selects the SIM card with the strongest signal strength from the second SIM cards and stably connects the SIM cards.
10. The network switching method according to claim 9, wherein the switching, by the main control circuit, the data transmitted by the first SIM card to the second SIM card mounted on the second communication circuit for transmission when it is detected that the signal strength of the first SIM card is continuously weakened or the signal strength of the first SIM card is smaller than the signal strength of the second SIM card comprises:
if the fact that the signal intensity of the first SIM card is continuously weakened or the signal intensity of the first SIM card is smaller than the signal intensity of the second SIM card is detected, the main control circuit sends a switching signal to the second communication circuit;
switching the data transmitted by the first SIM card to a second SIM card which is stably connected with the second communication circuit for transmission;
and cutting off the data transmission of the first SIM card when the second SIM card transmission stabilization instruction is detected.
11. The network switching method according to claim 9, wherein the detecting, by the main control circuit, the signal strength of a second SIM card, which is mounted on a second communication circuit and is in a different network from the first SIM card specifically includes:
the second communication circuit is sequentially connected with different second SIM cards, and detects and searches a network corresponding to the SIM card during each connection;
if the switching instruction is received, the second communication circuit stops detecting and selects the second SIM card with the strongest signal intensity to be stably connected;
if the switching instruction is not received, returning to the step: and sequentially connecting different second SIM cards, and detecting and searching a network corresponding to the SIM card during each connection.
12. The method of claim 7, wherein the first SIM card and the second SIM card support any of 3G, 4G, and 5G network modes.
13. The method of claim 7, wherein the first communication circuit and the second communication circuit can mount a mobile SIM card, a Unicom SIM card and a telecom SIM card at the same time.
14. An in-vehicle terminal characterized in that the in-vehicle terminal comprises the communication terminal of any one of claims 1 to 6.
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