A method for automatically switching SIM cards of vehicle-mounted terminals

Abstract

The present invention relates to an automatic switching method for SIM cards of vehicle-mounted terminals, which solves the problems of single SIM card type limitation, difficulty in replacing SIM cards and insufficient communication stability of traditional vehicle-mounted terminals. Plug-in cards are used preferentially, and the terminal detects plug-in cards when it is turned on. If no plug-in card is detected, a patch card is used to search for a network; if a plug-in card is detected, and the last power-on cycle is for the patch card to stay on the network, then it is detected whether the IMEI of the plug-in card changes, if the IMEI changes, the plug-in card is used to search for a network, if the IMEI remains unchanged for a fixed time, the plug-in card is also used to search for a network, otherwise the patch card is used to search for a network, and when the terminal cannot detect the IMEI, an ICCID detection is performed; if a plug-in card is detected, and the last power-on cycle is for the plug-in card to stay on the network, the plug-in card is used to search for a network; if it is impossible to stay on the network, switch to other cards to search for a network, and so on. The present invention improves the scope of application and flexibility of vehicle-mounted terminals, reduces the difficulty and cost of after-sales service, and ensures that the vehicle-mounted terminal always maintains a stable communication effect.

Description

Technical Field

[0001] The invention relates to a vehicle-mounted terminal, and in particular to a method for automatically switching a SIM card of a vehicle-mounted terminal. Background Art

[0002] With the rapid development of vehicle communication technology, vehicle terminals play an important role in vehicle management, location tracking, emergency rescue, etc. In these applications, SIM cards are key components for vehicle terminals to communicate with external networks, and their stability and flexibility are crucial to the performance of vehicle terminals. However, although the vehicle terminals on the market currently have two card slots for plug-in cards and patch cards, most of them only use a single patch-type SIM card, which cannot be flexibly switched according to actual application scenarios and needs, limiting the scope of application and performance of vehicle terminals. In addition, if the patch card is damaged, the existing terminal switching mechanism is simple and the networking speed is slow, and the dual card slots cannot be effectively utilized, which greatly increases the difficulty and cost of after-sales service.

[0003] 1. Single SIM card type limitation

[0004] Traditional vehicle terminals only support plug-in or patch-type SIM cards and cannot effectively utilize both types of SIM cards, limiting their application scope and flexibility.

[0005] 2. Difficulty in replacing SIM cards

[0006] For vehicle-mounted terminals without a SIM card switching mechanism, if the SIM card needs to be replaced, it is usually necessary to disassemble the vehicle-mounted terminal or perform complicated operations, which increases the difficulty and cost of after-sales service.

[0007] 3. Insufficient communication stability

[0008] Due to differences in network environments in different regions and operators, a single type of SIM card may not be able to maintain stable communication effects in all scenarios. Summary of the invention

[0009] The object of the present invention is to provide a vehicle-mounted terminal SIM card plug-in and patch-type automatic switching system, which is compatible with both plug-in SIM cards and patch-type SIM cards, and automatically switches according to actual application scenarios and requirements to improve the application scope, flexibility and communication stability of the vehicle-mounted terminal.

[0010] The present invention is achieved by the following technical solutions:

[0011] A method for automatically switching SIM cards of a vehicle terminal is as follows:

[0012] 1. SIM card automatic switching logic

[0013] 1) Use plug-in cards first. The terminal detects the plug-in card when it is turned on. If no plug-in card is detected, use the patch card to search the network.

[0014] 2) If a plug-in card is detected, and the last power-on cycle is for the patch card to be on the network, then check whether the IMEI of the plug-in card has changed. If the IMEI has changed, use the plug-in card to search for the network. If the IMEI remains unchanged for a fixed period of time, use the plug-in card to search for the network. Otherwise, use the patch card to search for the network. When the terminal cannot detect the IMEI, perform ICCID detection;

[0015] 3) If a plug-in card is detected, and the last power-on cycle was when the plug-in card was on the network, the plug-in card is used to search for the network;

[0016] 4) If the network cannot be accessed within a certain period of time, switch to other cards to explore the network, and repeat the cycle.

[0017] 2. User Interface and Interaction

[0018] Added the function of manually switching cards using the menu button, allowing users to view the type, status and switching options of the currently used SIM card through the display screen of the vehicle terminal;

[0019] The menu bar position displays: Menu - Vehicle Status - Communication Status - SIM Card Status;

[0020] The interface can display the type of SIM card currently in use, and you can use the up and down keys and the OK key to manually switch cards;

[0021] 3. Manual card switching logic

[0022] Move the cursor to the corresponding SIM card type, click OK, and the terminal screen will give another reminder: Do you want to use XX card to connect to the Internet?

[0023] 1) Click the patch card

[0024] If the device is not currently connected to the network, use the patch card to explore the network first; if the device is currently connected to the network using the patch card, no action will be taken; if the device is currently connected to the network using the plug-in card, disconnect the device and use the patch card to search the network again;

[0025] 2) Click to insert or remove the card

[0026] If the device is not equipped with a plug-in card, no processing is performed; if the device is not currently connected to the network, use the plug-in card to explore the network first; if the device is currently connected to the network using a patch card, disconnect and use the plug-in card to search the network again; if the device is currently connected to the network using a plug-in card, no processing is performed;

[0027] 3) If the network cannot be accessed within a certain period of time, switch to other cards to explore the network, and repeat this cycle.

[0028] If the network cannot be accessed within 3-5 minutes, switch to other cards to explore the network, and repeat this cycle.

[0029] If the IMEI remains fixed for 2-3 days, use the same method to explore the network by plugging and unplugging the card.

[0030] Beneficial effects of the present invention:

[0031] The present invention improves the application scope and flexibility of the vehicle-mounted terminal, and can be compatible with both plug-in and patch-type SIM cards, meeting different application scenarios and user needs;

[0032] The difficulty and cost of replacing SIM cards are reduced. Users can easily replace SIM cards without disassembling the vehicle terminal or performing complicated operations, which reduces the difficulty and cost of after-sales service. Users only need to be remotely guided to replace SIM cards.

[0033] Improved communication stability, automatic switching logic selects the most suitable SIM card type for the current scenario, ensuring that the vehicle terminal always maintains stable communication effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the SIM card switching logic diagram of the present invention. DETAILED DESCRIPTION

[0035] like Figure 1 As shown, the present invention is a method for automatically switching SIM cards of a vehicle-mounted terminal.

[0036] 1. SIM card automatic switching logic

[0037] 1. Give priority to using plug-in cards. When the terminal is turned on, detect the plug-in card. If no plug-in card is detected, use a patch card to search the network.

[0038] 2. If a plug-in card is detected and the last power-on cycle was when the patch card was on the network, check whether the IMEI of the plug-in card has changed. If the IMEI has changed, use the plug-in card to search for the network. If the IMEI remains unchanged for a fixed period of time (for example, 3 days), use the plug-in card to search for the network. Otherwise, use the patch card to search for the network. When the terminal cannot detect the IMEI, ICCID detection can be performed.

[0039] 3. If a plug-in card is detected and the last power-on cycle was when the plug-in card was on the network, the plug-in card is used to explore the network.

[0040] 4. If the network cannot be accessed within 5 minutes, switch to other cards to explore the network, and repeat the cycle.

[0041] 2. User Interface and Interaction:

[0042] A manual card switching function using the menu button has been added, allowing users to view the currently used SIM card type, status and switching options through the display screen of the vehicle terminal.

[0043] Menu bar location: Menu - Vehicle Status - Communication Status - SIM Card Status;

[0044] Description: It can display the type of SIM card currently in use (searching for network and staying on the network). Use the up and down keys and the OK key to perform manual card switching.

[0045] 3. Manual card switching logic (valid only for this power-on cycle)

[0046] Move the cursor to the corresponding SIM card type, click OK, and the terminal screen will give another reminder: Do you want to use XX card to connect to the Internet?

[0047] 1. Click the patch card

[0048] If the current state is not on the network, use the patch card to explore the network first; if the patch card is currently on the network, no processing is done; if the plug-in card is currently on the network, disconnect and use the patch card to explore the network again.

[0049] 2. Click on the card to insert or remove

[0050] If the device is not equipped with a plug-in card, no processing is performed; if the device is not currently connected to the network, use the plug-in card to explore the network first; if the patch card is currently used to connect to the network, disconnect and use the plug-in card to search for the network again; if the plug-in card is currently used to connect to the network, no processing is performed.

[0051] 3. If the network cannot be accessed within 5 minutes, switch to other cards to explore the network, and repeat the cycle.

Claims

1. A method for automatically switching SIM cards of a vehicle terminal, characterized by comprising:

1. SIM card automatic switching logic 1) Use plug-in cards first. The terminal detects the plug-in card when it is turned on. If no plug-in card is detected, use the patch card to search the network. 2) If a plug-in card is detected, and the last power-on cycle is for the patch card to be on the network, then check whether the IMEI of the plug-in card has changed. If the IMEI has changed, use the plug-in card to search for the network. If the IMEI remains unchanged for a fixed period of time, use the plug-in card to search for the network. Otherwise, use the patch card to search for the network. When the terminal cannot detect the IMEI, perform ICCID detection; 3) If a plug-in card is detected, and the last power-on cycle was when the plug-in card was on the network, the plug-in card is used to search for the network; 4) If the network cannot be accessed within a certain period of time, it will switch to other cards to explore the network, and so on; 2. User Interface and Interaction Added the function of manually switching cards using the menu button, allowing users to view the type, status and switching options of the currently used SIM card through the display screen of the vehicle terminal; The menu bar position displays: Menu - Vehicle Status - Communication Status - SIM Card Status; The interface can display the type of SIM card currently in use, and you can use the up and down keys and the OK key to manually switch cards; 3. Manual card switching logic Move the cursor to the corresponding SIM card type, click OK, and the terminal screen will give another reminder: Do you want to use XX card to connect to the Internet? 1) Click the patch card If the device is not currently connected to the network, use the patch card to explore the network first; if the device is currently connected to the network using the patch card, no action will be taken; if the device is currently connected to the network using the plug-in card, disconnect the device and use the patch card to search the network again; 2) Click to insert or remove the card If the device is not equipped with a plug-in card, no processing is performed; if the device is not currently connected to the network, use the plug-in card to explore the network first; if the device is currently connected to the network using a patch card, disconnect and use the plug-in card to search the network again; if the device is currently connected to the network using a plug-in card, no processing is performed; 3) If the network cannot be accessed within a certain period of time, switch to other cards to explore the network, and repeat this cycle.

2. The method for automatically switching SIM cards of a vehicle-mounted terminal according to claim 1, characterized in that: If the network cannot be accessed within 3-5 minutes, switch to other cards to explore the network, and repeat this cycle.

3. The method for automatically switching SIM cards of a vehicle-mounted terminal according to claim 1, characterized in that: If the IMEI remains fixed for 2-3 days, use the same method to explore the network by plugging and unplugging the card.

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