Communication control unit and method for freely switching network searching in dual-medium dual-mode network

Abstract

The invention discloses a communication control unit and method for freely switching network searching in a dual-medium dual-mode network, and the communication unit comprises a radio frequency antenna switching circuit unit which is used for gating the connection between an antenna and a communication module; the SIM card switching circuit unit is used for gating connection between the SIM card and the communication module, and the S IM card supports a 4G dual-mode communication system; the dual-mode communication module switching enabling circuit unit is used for gating the connection between the main control MCU and the communication modules, the number of the communication modules is two, and the main control MCU is respectively in gating connection with the same SIM card and the same radio frequency antenna by gating the dual-mode communication modules through same-frequency signals; and the power management single-path auxiliary unit is used for providing power supply in the circuit. According to the invention, the problem that two or more communication modes are transversely compatible in a dual-mode communication process can be effectively solved, automatic network switching and network searching are realized under the condition that only a single radio frequency antenna and a single SIM card are used, and the self-adaptive adaptation capability of the communication unit is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage high-speed public network wireless 4G communication, and more specifically, to a communication control unit and method for freely switching and searching for a network in a dual-medium dual-mode network. Background Art

[0002] 4G technology is a high-speed wireless communication technology. As a long-distance, highly reliable, low-latency, and high-throughput wireless communication technology, it has become a leader in the field of wireless communications because of its unique support for the standard TCP / IP protocol. At the same time, because it does not require independent wiring and can achieve remote communication solely by relying on the existing operator network resources, it has helped it become an important member of wide-area network communications.

[0003] Although 4G network coverage has penetrated all over the world, with the development of 4G network, its branch network modes are also increasing, and different countries and regions have also seen endless communication module requirements. For example, on a communication unit, it is required to simultaneously implement different combinations of LTE_CAT4, LTE_CAT1, LTE_NB, and LTE_CATM. The 4G communication unit with a single network mode can no longer meet its requirements. Although communication module manufacturers have made many attempts for multi-mode communication and switching solutions, they have only achieved downward compatibility of 4G communication units, that is, vertical compatibility of 4G, 2G, and NB, and have not achieved horizontal 4G compatibility.

[0004] Therefore, how to realize 4G dual-mode or even multi-mode network switching on the same communication unit to meet the requirements without changing the equipment and achieve seamless switching still needs research. Summary of the invention

[0005] The purpose of the present invention is to provide a communication control unit and method for freely switching and searching for a network in a dual-medium dual-mode network, which can effectively solve the problem of horizontal compatibility of two or more communication modes in the dual-mode communication process, realize automatic network switching and searching for a network under the condition of using only a single radio frequency antenna and a single SIM card, and greatly improve the adaptive adaptation capability of the communication unit.

[0006] A first aspect of the present invention provides a communication control unit for freely switching and searching for a network in a dual-medium dual-mode network, comprising:

[0007] A radio frequency antenna switching circuit unit, used to select the connection between the antenna and the communication module;

[0008] A SIM card switching circuit unit, used to select the connection between the SIM card and the communication module, wherein the SIM card supports a 4G dual-mode communication system;

[0009] A dual-mode communication module switching enabling circuit unit, used to select the connection between the main control MCU and the communication module, wherein the number of the communication modules is two, and the main control MCU same-frequency signal selects the dual-mode communication module to be respectively connected to the same SIM card and the same radio frequency antenna;

[0010] A power management single-channel auxiliary unit is used to provide power supply in the circuit;

[0011] The main control MCU is used to output the control level.

[0012] In this solution, the RF antenna switching circuit unit controls the connection between the RF switch antenna and the communication module through the inverter outputting positive and negative signals, wherein the two communication modules share the same standard interface connector.

[0013] In this solution, the RF antenna switching circuit unit ensures the communication connection between the external data transmitting and receiving antenna and the target module in the dual-mode communication module through a switching circuit, wherein the dual-mode communication module corresponds to two of the communication modules.

[0014] In this solution, the SIM card switching circuit unit receives the control signal output by the main control MCU and selects the connection between the SIM card and the SIM card peripheral circuit and the communication module through the first analog switch, wherein the first analog switch switches the SIM card interfaces of the two communication modules so that the two communication modules share the same SIM card slot, and the SIM card peripheral circuit is located at the output common end of the first analog switch SW2, and the two sets of input ends are directly connected to the SIM card interface pins of the two communication modules.

[0015] In this solution, the SIM card switching circuit unit switches the circuit to ensure that the SIM card provided by the operator exchanges information with the target module in the dual-mode communication module to complete device authentication.

[0016] In this solution, the dual-mode communication module switching enabling circuit unit respectively enables the connection between the main control MCU and the power-on, reset and communication functions of the two communication modules through the second analog switch.

[0017] In this solution, the main control MCU cross-controls the operation of the dual-mode communication module through the reset RST, power-on PWRKEY and UART communication TXD / RXT pins of the second analog switch dual-mode communication module.

[0018] The second invention of the present invention also provides a communication control method for freely switching and searching for a network in a dual-medium dual-mode network, which is applied to the communication control unit for freely switching and searching for a network in a dual-medium dual-mode network as described in any one of the above, wherein the method comprises the following steps:

[0019] After the 4G communication module control unit is powered on, it switches to a dual-mode network until it successfully selects the target module.

[0020] First, search for the network according to the driving process of communication module A. If successful, save the current network information immediately and continue to activate the network to establish a communication link, and use the communication module A as the target module;

[0021] If it fails, it switches to the driving process of communication module B to search for the network. If communication module B succeeds in finding the network, it immediately saves the current network information and continues to activate the network to establish a communication link, and uses communication module B as the target module. If it fails, it searches for the network based on a cyclic mechanism of first communication module A and then communication module B; among them,

[0022] The driving process of communication module A corresponds to that the general input and output port of the main control MCU outputs a high level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to the communication module A, the SIM card switching circuit unit connects the SIM card gating to the communication module A, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to the communication module A;

[0023] The driving process of communication module B corresponds to the general input and output port of the main control MCU outputting a low level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the selection path of the external antenna to connect to communication module B, the SIM card switching circuit unit connects the SIM card selection to communication module B, and the second analog switch of the dual-mode communication module switching enable circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to communication module B.

[0024] The third aspect of the present invention also provides a communication control system for freely switching and searching for a network in a dual-medium dual-mode network, comprising a memory and a processor, wherein the memory comprises a communication control method program for freely switching and searching for a network in a dual-medium dual-mode network, and when the communication control method program for freely switching and searching for a network in a dual-medium dual-mode network is executed by the processor, the following steps are implemented:

[0025] After the 4G communication module control unit is powered on, it switches to a dual-mode network until it successfully selects the target module.

[0026] First, search for the network according to the driving process of communication module A. If successful, save the current network information immediately and continue to activate the network to establish a communication link, and use the communication module A as the target module;

[0027] If it fails, it switches to the driving process of communication module B to search for the network. If communication module B succeeds in finding the network, it immediately saves the current network information and continues to activate the network to establish a communication link, and uses communication module B as the target module. If it fails, it searches for the network based on a cyclic mechanism of first communication module A and then communication module B; among them,

[0028] The driving process of communication module A corresponds to that the general input and output port of the main control MCU outputs a high level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to the communication module A, the SIM card switching circuit unit connects the SIM card gating to the communication module A, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to the communication module A;

[0029] The driving process of communication module B corresponds to the general input and output port of the main control MCU outputting a low level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the selection path of the external antenna to connect to communication module B, the SIM card switching circuit unit connects the SIM card selection to communication module B, and the second analog switch of the dual-mode communication module switching enable circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to communication module B.

[0030] The fourth aspect of the present invention provides a computer-readable storage medium, which includes a communication control method program for freely switching and searching for a network in a dual-medium dual-mode network of a machine. When the communication control method program for freely switching and searching for a network in a dual-medium dual-mode network is executed by a processor, the steps of the communication control method for freely switching and searching for a network in a dual-medium dual-mode network as described in any one of the above items are implemented.

[0031] The present invention discloses a communication control unit and method for freely switching and searching for a network in a dual-medium dual-mode network, and the beneficial effects are as follows:

[0032] (1) Use the same SIM card and RF antenna to reduce the structural complexity of the device.

[0033] (2) Automatically switch the module network mode according to the current network situation.

[0034] (3) Use an inverter, a RF switch, and two analog switches to simplify the circuit and improve the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram showing the structure of a communication control unit for freely switching and searching for a network in a dual-medium dual-mode network of the present invention is shown;

[0036] Figure 2 A circuit diagram of a radio frequency antenna switching circuit unit of the present invention is shown;

[0037] Figure 3 A circuit diagram of a SIM card switching circuit unit of the present invention is shown;

[0038] Figure 4 A circuit diagram of a dual-mode communication module switching enabling circuit unit of the present invention is shown;

[0039] Figure 5 A flow chart showing a communication control method for freely switching and searching for a network in a dual-medium dual-mode network of the present invention is shown;

[0040] Figure 6 The block diagram of a communication control system for freely switching and searching for a network in a dual-medium dual-mode network of the present invention is shown. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0043] Figure 1 The present invention shows a schematic structural diagram of a communication control unit for freely switching and searching for a network in a dual-medium dual-mode network, including:

[0044] A radio frequency antenna switching circuit unit, used to select the connection between the antenna and the communication module;

[0045] A SIM card switching circuit unit, used to select the connection between the SIM card and the communication module, wherein the SIM card supports a 4G dual-mode communication system;

[0046] A dual-mode communication module switching enabling circuit unit, used to select the connection between the main control MCU and the communication module, wherein the number of the communication modules is two, and the main control MCU selects the dual-mode communication modules through the same frequency signal to respectively select and connect with the same SIM card and the same radio frequency antenna;

[0047] A power management single-channel auxiliary unit is used to provide power supply in the circuit;

[0048] The main control MCU is used to output the control level.

[0049] It should be noted that, in the present embodiment, there are two corresponding communication modules in the dual-medium dual-mode network, namely, dual-mode communication modules. In this regard, four circuit units are described in the present embodiment to control the switching and network searching, including a radio frequency antenna switching circuit unit, a SIM card switching circuit unit, a dual-mode communication module switching enabling circuit unit, and a power management single-channel auxiliary unit. Specifically, the radio frequency antenna switching circuit unit includes a radio frequency antenna, an inverter, and a radio frequency switch SW1, and the SIM card switching circuit unit includes a SIM card slot, a SIM card circuit (including a SIM card peripheral circuit), and a first analog switch SW2. The dual-mode communication module switching enabling circuit unit includes a dual-mode communication module (corresponding to module A and module B, respectively) and a second analog switch SW3, and the power management circuit auxiliary unit is responsible for providing power supply in the circuit, and the main control MCU is used to output the control level. The specific composition can be referred to. Figure 1 .

[0050] According to an embodiment of the present invention, the RF antenna switching circuit unit controls the connection between the RF switch antenna and the communication module by outputting positive and negative signals through an inverter, wherein the two communication modules share the same standard interface connector, and the RF antenna switching circuit unit ensures the communication connection between the external data transmitting and receiving antenna and the target module in the dual-mode communication module through a switching circuit, wherein the dual-mode communication module corresponds to the two communication modules.

[0051] It should be noted that, in this embodiment, Figure 2 As shown, it is a circuit diagram of the RF antenna switching circuit unit. Specifically, the RF switch SW1 (U3), the inverter CON3 and the antenna connector J2 together constitute the RF antenna switching circuit unit, wherein the RFC pin of the RF switch SW1 is connected to the antenna connector, the two pins RF1 / 2 of the RF switch SW1 are respectively connected to the antenna pins ANT_N717 / ANT_N27 of the dual-mode communication module A / B, the two signal control pins of the RF switch SW1 are respectively connected to the output pins V1_MA / V1_M_B of the inverter, and the input signal control pin V1_M of the inverter CON3 is directly connected to the main control MCU. The V1_M pin of the MCU uses a single signal to drive the inverter to output a positive and negative symmetrical output signal under the control of the main control MCU, thereby controlling the RF switch SW1 to switch the RFC to connect to the corresponding RF1 / 2, and then realize that the RF antenna is connected to the corresponding antenna connection pin of module A or module B through the antenna connector, so that the RF antenna switching circuit unit controls the connection of the RF switch to the communication module through the inverter output positive and negative signals, wherein the two communication modules share the same standard interface connector, and the RF antenna switching circuit unit ensures the communication connection between the external data transmitting and receiving antenna and the target module in the dual-mode communication module through the switching circuit.

[0052] According to an embodiment of the present invention, the SIM card switching circuit unit receives a control signal output by the main control MCU to select the connection between the SIM card and the SIM card peripheral circuit and the communication module through the first analog switch, wherein the first analog switch switches the SIM card interfaces of the two communication modules so that the two communication modules share the same SIM card slot, and the SIM card peripheral circuit is located at the output common end of the first analog switch SW2, and the two sets of input ends are directly connected to the SIM card interface pins of the two communication modules, and the SIM card switching circuit unit ensures that the SIM card provided by the operator exchanges information with the target module in the dual-mode communication module through the switching circuit to complete the device authentication.

[0053] It should be noted that, in this embodiment, Figure 3 As shown, it is a circuit diagram of a SIM card switching circuit unit. Specifically, the SIM card slot J5, the SIM card circuit and the first analog switch SW2 (U2) together constitute the SIM card switching circuit unit, wherein the "4" common ports of the analog SW2 are connected to the Net_Lable of the "4" signals of the SIM card circuit, and the "4" signal NC and NO ports are respectively connected to the SIM card interface pins of the communication module A / B, and the two control signals IN12 / IN34 of the first analog switch SW2 come from the same MCU pin. Under the control of the main control MCU, the first analog switch SW2 is driven to switch its "4" common ports to the corresponding "4" NO and NC ports as required, so as to realize that the two groups of input terminals are directly connected to the SIM card interface pins of the two communication modules, and the SIM card switching circuit unit ensures that the SIM card provided by the operator interacts with the target module in the dual-mode communication module through the switching circuit to complete the device authentication.

[0054] According to an embodiment of the present invention, the dual-mode communication module switching enabling circuit unit respectively selects the connection between the main control MCU and the power-on, reset and communication functions of the two communication modules through the second analog switch, and the main control MCU cross-controls the operation of the dual-mode communication module through the reset RST, power-on PWRKEY and UART communication TXD / RXT pins of the dual-mode communication module of the second analog switch.

[0055] It should be noted that, in this embodiment, Figure 4As shown, it is a circuit schematic diagram of the dual-mode communication module switching enabling circuit unit, wherein the communication module A, the communication module B, the second analog switch SW3 (U8) dual-mode communication module switching enabling circuit unit, wherein the second analog switch U8 controls the GPRS_RXD, GPRS_TXD, PWRKEY and RST pins of the main control MCU to be connected to the RXD, TXD, PWRKEY and power control pin RST of the communication module A / B respectively, and drives the IN_M pin of the first analog switch SW2 under the control of the main control MCU, thereby controlling the RF switch to switch its "4" common ports to the corresponding "4" NO and NC ports, wherein the power control pin RST_N27 controls the reset of the communication module A through the MOS tube and the resistor R16, and RST_N717 controls the reset of the communication module through the transistor V1, the MOS tube M2 and the R17 / 18.

[0056] Figure 5 A flow chart of a communication control method for freely switching and searching for a network in a dual-medium dual-mode network of the present application is shown.

[0057] like Figure 5 As shown, the present application discloses a communication control method for freely switching and searching for a network in a dual-medium dual-mode network, which is applied to a communication control unit for freely switching and searching for a network in a dual-medium dual-mode network as described above, and includes the following steps:

[0058] S502, after the 4G communication dual-mode communication system is powered on and started, dual-mode network switching is performed until the target module is successfully selected;

[0059] S504, first search for a network according to the driving process of the communication module A, if successful, immediately save the current network information and continue to activate the network to establish a communication link, and use the communication module A as the target module;

[0060] S506, if it fails, switch to the driving process of communication module B to search the network. If communication module B successfully searches the network, save the current network information immediately and continue to activate the network to establish a communication link, and use communication module B as the target module. If it fails, perform a cyclic search based on the loop mechanism of communication module A first and then communication module B.

[0061] It should be noted that in this embodiment, combined with the above embodiments Figure 2 , Figure 3 as well as Figure 4The present application realizes the automatic network switching process as follows: the VI_M signal pin of the inverter in the RF circuit switching circuit unit, the IN12 / IN34 signal pin of the first analog switch SW2 in the SIM card switching circuit unit, and the IN12 / IN34 signal pin of the first analog switch SW3 in the dual-mode communication module switching enabling circuit unit are simultaneously connected to a conventional GPIO of the main control MCU, and the GPIO port is controlled by the MCU program. Specifically, when the output is high level, the inverter of the RF switching unit controls the RF switch SW1 to select the gating path of the external antenna to connect to the communication module A, the SIM card switching unit selects the SIM card to connect to the communication module A, and the first analog switch SW2 of the module switching enabling circuit unit selects the serial port signal, PWRKEY and RST pins of the MCU to connect to the communication module A. Conversely, when the output is low level, the above three switching circuits are simultaneously selected to connect to the communication module B.

[0062] Furthermore, the automatic network search method obtained in combination with the description of the automatic dual-mode network switching process is specifically as follows: when the 4G communication unit is powered on and started, the main control MCU first switches the hardware state to the 4G network mode of communication module A through the dual-mode network switching process, and controls the current 4G communication unit according to the AT drive process of module A to try to use the network mode of module A to find the network. Once successful, the current network information is immediately saved and the network continues to be activated and the communication link is established. If it fails, the MCU switches to the network mode of module B and searches for the network in the same way. Taking into account network failures and other reasons, if both dual-mode modes cannot successfully find the network, the 4G communication unit will cyclically try the above switching mechanism, wherein the driving process of communication module A corresponds to the general input and output port of the main control MCU outputting a high level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to communication module A, the SIM card switching circuit unit connects the SIM card gating to communication module A, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power-on pin and reset pin of the main control MCU to communication module A; the driving process of communication module B corresponds to the general input and output port of the main control MCU outputting a low level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to communication module B, the SIM card switching circuit unit connects the SIM card gating to communication module B, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power-on pin and reset pin of the main control MCU to communication module B.

[0063] Figure 6 The block diagram of a communication control system for freely switching and searching for a network in a dual-medium dual-mode network of the present invention is shown.

[0064] like Figure 6 As shown, the present invention discloses a communication control system for freely switching and searching for a network in a dual-medium dual-mode network, comprising a memory and a processor, wherein the memory comprises a communication control method program for freely switching and searching for a network in a dual-medium dual-mode network, and when the communication control method program for freely switching and searching for a network in a dual-medium dual-mode network is executed by the processor, the following steps are implemented:

[0065] After 4G communication is powered on, dual-mode network switching is performed until the target module is successfully selected.

[0066] First, search for the network according to the driving process of communication module A. If successful, save the current network information immediately and continue to activate the network to establish a communication link, and use the communication module A as the target module;

[0067] If it fails, it switches to the driving process of communication module B to search for the network. If communication module B succeeds in finding the network, it immediately saves the current network information and continues to activate the network to establish a communication link, and uses communication module B as the target module. If it fails, it searches for the network based on a cyclic mechanism of first communication module A and then communication module B; among them,

[0068] In this embodiment, combined with the above embodiments Figure 2 , Figure 3 as well as Figure 4 The present application realizes the automatic network switching process as follows: the VI_M signal pin of the inverter in the RF circuit switching circuit unit, the IN12 / IN34 signal pin of the first analog switch SW2 in the SIM card switching circuit unit, and the IN12 / IN34 signal pin of the first analog switch SW3 in the dual-mode communication module switching enabling circuit unit are simultaneously connected to a conventional GPIO of the main control MCU, and the GPIO port is controlled by the MCU program. Specifically, when the output is high level, the inverter of the RF switching unit controls the RF switch SW1 to select the gating path of the external antenna to connect to the communication module A, the SIM card switching unit selects the SIM card to connect to the communication module A, and the first analog switch SW2 of the module switching enabling circuit unit selects the serial port signal, PWRKEY and RST pins of the MCU to connect to the communication module A. Conversely, when the output is low level, the above three switching circuits are simultaneously selected to connect to the communication module B.

[0069] Furthermore, the automatic network search method obtained in combination with the description of the automatic dual-mode network switching process is specifically as follows: when the 4G communication unit is powered on and started, the main control MCU first switches the hardware state to the 4G network mode of communication module A through the dual-mode network switching process, and controls the current 4G communication unit according to the AT drive process of module A to try to use the network mode of module A to find the network. Once successful, the current network information is immediately saved and the network continues to be activated and the communication link is established. If it fails, the MCU switches to the network mode of module B and searches for the network in the same way. Taking into account network failures and other reasons, if both dual-mode modes cannot successfully find the network, the 4G communication unit will cyclically try the above switching mechanism, wherein the driving process of communication module A corresponds to the general input and output port of the main control MCU outputting a high level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to communication module A, the SIM card switching circuit unit connects the SIM card gating to communication module A, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power-on pin and reset pin of the main control MCU to communication module A; the driving process of communication module B corresponds to the general input and output port of the main control MCU outputting a low level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to communication module B, the SIM card switching circuit unit connects the SIM card gating to communication module B, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power-on pin and reset pin of the main control MCU to communication module B.

[0070] The fourth aspect of the present invention provides a computer-readable storage medium, which includes a communication control method program for freely switching and searching for a network in a dual-medium dual-mode network. When the communication control method program for freely switching and searching for a network in a dual-medium dual-mode network is executed by a processor, the steps of the communication control method for freely switching and searching for a network in a dual-medium dual-mode network as described in any one of the above items are implemented.

[0071] The present invention discloses a communication control unit and method for freely switching and searching for a network in a dual-medium dual-mode network, which can effectively solve the problem of horizontal compatibility of two or more communication modes in the dual-mode communication process, realize automatic network switching and searching for a network under the condition of using only a single radio frequency antenna and a single SIM card, and greatly improve the adaptive adaptation capability of the communication unit.

[0072] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0073] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0074] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0075] Those skilled in the art can understand that: all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), disks or optical disks, and other media that can store program codes.

[0076] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

Claims

1. A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network, characterized in that: include: A radio frequency antenna switching circuit unit, used to select the connection between the antenna and the communication module; A SIM card switching circuit unit, used to select the connection between the SIM card and the communication module, wherein the SIM card supports a 4G dual-mode communication system; A dual-mode communication module switching enabling circuit unit, used to select the connection between the main control MCU and the communication module, wherein the number of the communication modules is two, and the main control MCU selects the dual-mode communication modules through the same frequency signal to respectively select and connect with the same SIM card and the same radio frequency antenna; A power management single-channel auxiliary unit is used to provide power supply in the circuit; The main control MCU is used to output the control level.

2. A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network according to claim 1, characterized in that: The RF antenna switching circuit unit outputs positive and negative signals through an inverter to control the connection between the RF switch antenna and the communication module, wherein the two communication modules share the same standard interface connector.

3. A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network according to claim 2, characterized in that: The radio frequency antenna switching circuit unit ensures the communication connection between the external data transmitting and receiving antenna and the target module in the dual-mode communication module through a switching circuit, wherein the dual-mode communication module corresponds to the description of the dual-mode network.

4. A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network according to claim 3, characterized in that: The SIM card switching circuit unit receives a control signal output by the main control MCU and selects the connection between the SIM card and the SIM card peripheral circuit and the communication module through the first analog switch, wherein the first analog switch switches the SIM card interfaces of the two communication modules so that the two communication modules share the same SIM card slot, and the SIM card peripheral circuit is located at the output common end of the first analog switch SW2, and the two sets of input ends are directly connected to the SIM card interface pins of the two communication modules.

5. A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network according to claim 4, characterized in that: The SIM card switching circuit unit switches the circuit to ensure that the SIM card provided by the operator interacts with the target module in the dual-mode communication module to complete device authentication.

6. A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network according to claim 5, characterized in that: The dual-mode communication module switching enabling circuit unit respectively enables the connection between the main control MCU and the power-on, reset and communication functions of the two communication modules through the second analog switch.

7. A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network according to claim 6, characterized in that: The main control MCU cross-controls the operation of the dual-mode communication module through the reset RST, power-on PWRKEY and UART communication TXD / RXT pins of the second analog switch dual-mode communication module.

8. A communication control method for freely switching and searching for a network in a dual-medium dual-mode network, characterized in that: A communication control unit for freely switching and searching for a network in a dual-medium dual-mode network according to any one of claims 1 to 7, wherein the method comprises the following steps: After the 4G communication module control unit is powered on, it switches to a dual-mode network until it successfully selects the target module. First, search for the network according to the driving process of communication module A. If successful, save the current network information immediately and continue to activate the network to establish a communication link, and use the communication module A as the target module; If it fails, it switches to the driving process of communication module B to search for the network. If communication module B succeeds in finding the network, it immediately saves the current network information and continues to activate the network to establish a communication link, and uses communication module B as the target module. If it fails, it searches for the network based on a cyclic mechanism of first communication module A and then communication module B; among them, The driving process of communication module A corresponds to that the general input and output port of the main control MCU outputs a high level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to the communication module A, the SIM card switching circuit unit connects the SIM card gating to the communication module A through the first analog switch, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to the communication module A; The driving process of communication module B corresponds to the general input and output port of the main control MCU outputting a low level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the selection path of the external antenna to connect to communication module B, the SIM card switching circuit unit connects the SIM card selection to communication module B through the first analog switch, and the second analog switch of the dual-mode communication module switching enable circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to communication module B.

9. A communication control system for freely switching and searching for a network in a dual-medium dual-mode network, characterized in that: The invention comprises a memory and a processor, wherein the memory comprises a communication control method program for freely switching and searching for a network in a dual-medium dual-mode network, and the communication control method program for freely switching and searching for a network in a dual-medium dual-mode network is executed by the processor to implement the following steps: After the 4G communication module control unit is powered on, it switches to a dual-mode network until it successfully selects the target module. First, search for the network according to the driving process of communication module A. If successful, save the current network information immediately and continue to activate the network to establish a communication link, and use the communication module A as the target module; If it fails, it switches to the driving process of communication module B to search for the network. If communication module B succeeds in finding the network, it immediately saves the current network information and continues to activate the network to establish a communication link, and uses communication module B as the target module. If it fails, it searches for the network based on a cyclic mechanism of first communication module A and then communication module B; among them, The driving process of communication module A corresponds to that the general input and output port of the main control MCU outputs a high level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the gating path of the external antenna to connect to the communication module A, the SIM card switching circuit unit connects the SIM card gating to the communication module A through the first analog switch, and the second analog switch of the dual-mode communication module switching enabling circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to the communication module A; The driving process of communication module B corresponds to the general input and output port of the main control MCU outputting a low level, the inverter of the RF antenna switching circuit unit controls the RF switch to select the selection path of the external antenna to connect to communication module B, the SIM card switching circuit unit connects the SIM card selection to communication module B through the first analog switch, and the second analog switch of the dual-mode communication module switching enable circuit unit connects the serial port signal, power pin and reset pin of the main control MCU to communication module B.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a communication control method program for freely switching and searching for a network in a dual-medium dual-mode network. When the communication control method program for freely switching and searching for a network in a dual-medium dual-mode network is executed by a processor, the steps of a communication control method for freely switching and searching for a network in a dual-medium dual-mode network as described in claim 8 are implemented.

Images