Internet of Things communication terminal and communication system

Abstract

The utility model discloses an Internet of Things communication terminal and a communication system. The communication terminal comprises a first frequency selection module, a second frequency selection module, a third frequency selection module and a communication chip. The communication chip is used for respectively controlling the first frequency selection module, the second frequency selection module and the third frequency selection module to be switched on or switched off; the first frequency selection module, the second frequency selection module and the third frequency selection module are used for transmitting any one of a first frequency band signaling, a second frequency band signaling and a third frequency band signaling to the communication chip when the first frequency selection module, the second frequency selection module and the third frequency selection module are conducted; and the first frequency selection module, the second frequency selection module and the third frequency selection module respectively transmit different frequency band signaling in the first frequency band signaling, the second frequency band signaling and the third frequency band signaling. According to the utility model, the problem of realizing roaming functions of three major operators with high power consumption is solved, the sensitivity of the communication terminal is not influenced, and the anti-interference performance of the communication terminal is greatly improved due to the frequency selection characteristics of different frequency selection modules.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially relates to a thing networking communication terminal and communication system. BACKGROUND

[0002] Under the policy guidance of double carbon target, passive thing networking technology gradually becomes an important component of 5G-A communication system. Passive thing networking technology requires that the communication terminal (tag) cannot use a battery and can only obtain energy from limited environment to power the terminal device, so that the communication terminal can work continuously, and the power consumption budget is small. From the business scope point of view, in order to make the passive thing networking communication terminal have greater market value, it needs to adapt to the business frequency bands of the three domestic operators. At present, a complex and high-power radio frequency channel selection module is generally set in the chip of the communication terminal to realize the roaming function of the three operators, but this scheme will greatly increase the power consumption budget of the communication terminal.

[0003] In order to solve the above problems, the existing technical scheme is to make the bandwidth of the antenna larger to fully cover the frequency bands of the three operators, but this scheme will greatly reduce the antenna gain and affect the sensitivity of the communication terminal. At the same time, due to the poor frequency selection characteristic, the interference signal power received by the communication terminal will also be very large, resulting in a large increase in communication error rate. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of thing networking communication terminal and communication system to solve the problem that current communication terminal is when realizing three big operators roaming function, power consumption is larger, sensitivity reduces and the problem of poor anti-interference ability.

[0005] Firstly, the utility model provides a kind of thing networking communication terminal, and the communication terminal includes: first frequency selection module, second frequency selection module, third frequency selection module and communication chip;

[0006] First frequency selection module, second frequency selection module and third frequency selection module are connected in parallel between antenna and communication chip;Antenna is used to receive mobile first frequency band signaling, the second frequency band signaling of China Unicom or the third frequency band signaling of telecom;

[0007] Communication chip is used to control first frequency selection module, second frequency selection module and third frequency selection module to be turned on or turned off respectively;First frequency selection module, second frequency selection module and third frequency selection module are used to transmit any one frequency band signaling in first frequency band signaling, second frequency band signaling and third frequency band signaling to communication chip when being turned on;First frequency selection module, second frequency selection module and third frequency selection module respectively transmit different frequency band signalings in first frequency band signaling, second frequency band signaling and third frequency band signaling.

[0008] Optionally, the communication terminal further includes: matching network;

[0009] The first end of the matching network is connected with the second end of the first frequency selection module, the second frequency selection module and the third frequency selection module, the first end of the first frequency selection module, the second frequency selection module and the third frequency selection module is connected with the antenna; the second end of the matching network is connected with the communication chip; the matching network is used for realizing impedance matching between the input end of the matching network and the output end of the matching network.

[0010] Optionally, the first frequency selection module comprises: a first radio frequency switch and a first filter unit;

[0011] The first radio frequency switch is connected between the antenna and the first filter unit, and the first radio frequency switch is also connected with the communication chip; the first filter unit is connected between the first radio frequency switch and the communication chip;

[0012] The communication chip is used for controlling the first radio frequency switch to be turned on or turned off, the first radio frequency switch is used for transmitting the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the first filter unit when turned on, and the first filter unit is used for filtering out any two frequency band signalings in the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmitting the unfiltered one frequency band signaling to the communication chip.

[0013] Optionally, the first filter unit comprises: a surface acoustic wave filter.

[0014] Optionally, the second frequency selection module comprises: a second radio frequency switch and a second filter unit;

[0015] The second radio frequency switch is connected between the antenna and the second filter unit, and the second radio frequency switch is also connected with the communication chip; the second filter unit is connected between the second radio frequency switch and the communication chip;

[0016] The communication chip is used for controlling the second radio frequency switch to be turned on or turned off, the second radio frequency switch is used for transmitting the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the second filter unit when turned on, and the second filter unit is used for filtering out any two frequency band signalings in the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmitting the unfiltered one frequency band signaling to the communication chip.

[0017] Optionally, the second filter unit comprises: a surface acoustic wave filter.

[0018] Optionally, the third frequency selection module comprises: a third radio frequency switch and a third filter unit;

[0019] The third radio frequency switch is connected between the antenna and the third filter unit, and the third radio frequency switch is also connected with the communication chip; the third filter unit is connected between the third radio frequency switch and the communication chip;

[0020] The communication chip is used for controlling the third radio frequency switch to be turned on or turned off, the third radio frequency switch is used for transmitting the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the third filter unit when being turned on, and the third filter unit is used for filtering any two frequency band signalings in the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmitting the unfiltered one frequency band signaling to the communication chip.

[0021] Optionally, the third filter unit comprises a surface acoustic wave filter.

[0022] Optionally, the communication chip comprises an analog demodulation circuit and a digital decoding circuit.

[0023] The analog demodulation circuit is connected between the first frequency selection module, the second frequency selection module and the third frequency selection module and the digital decoding circuit, the first end of the digital decoding circuit is connected with the analog demodulation circuit, and the second end of the digital decoding circuit is connected with the first frequency selection module, the second frequency selection module and the third frequency selection module.

[0024] The analog demodulation circuit is used for demodulating the first frequency band signaling, the second frequency band signaling or the third frequency band signaling, and the digital decoding circuit is used for controlling the first frequency selection module, the second frequency selection module and the third frequency selection module to be turned on or turned off.

[0025] In a second aspect, the utility model provides a kind of internet of things communication system, wherein, communication system includes the internet of things communication terminal provided in the above first aspect.

[0026] The technical scheme of the embodiment of the utility model, first frequency selection module, second frequency selection module and third frequency selection module are respectively adapted to the frequency band signaling of three operators, and the communication chip is circulated to turn on and turn off first frequency selection module, second frequency selection module and third frequency selection module, until when a certain frequency selection module is turned on, the communication chip receives the frequency band signaling with the similarity of the frame header sequence of the protocol specified in advance exceeding the preset value, the communication chip stops switching the turn-on and turn-off of first frequency selection module, second frequency selection module and third frequency selection module, and communicates with external equipment. Until the communication process is completed and enters a new communication cycle, first frequency selection module, second frequency selection module and third frequency selection module are recycled to turn on and turn off. The technical scheme of the utility model, the communication chip without radio frequency channel selection module and the three groups of non-power consumption frequency selection modules outside the chip are arranged to realize the roaming function of three operators of passive internet of things communication terminal, solve the problem of realizing the roaming function of three operators with high power consumption, and the sensitivity of communication terminal is not affected. Due to the frequency selection characteristics of different frequency selection modules, the anti-interference performance of the communication terminal is greatly improved.

[0027] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 is a structural schematic diagram of a kind of Internet of Things communication terminal provided by the embodiments of the present application;

[0030] Figure 2 is a control timing diagram of a kind of Internet of Things communication terminal provided by the embodiments of the present application;

[0031] Figure 3 is another structural schematic diagram of a kind of Internet of Things communication terminal provided by the embodiments of the present application;

[0032] Figure 4 is another structural schematic diagram of a kind of Internet of Things communication terminal provided by the embodiments of the present application;

[0033] Figure 5 is another structural schematic diagram of a kind of Internet of Things communication terminal provided by the embodiments of the present application. DETAILED DESCRIPTION

[0034] In order to make those skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0035] It should be noted that the terms "first", "second", and the like in the description and in the claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Figure 1 It is a structure schematic view of a kind of Internet of Things communication terminal provided by the utility model embodiment, Figure 2 It is the control timing diagram of a kind of Internet of Things communication terminal provided by the utility model embodiment, as Figure 1 As shown, comprising: first frequency selection module 1, second frequency selection module 2, third frequency selection module 3 and communication chip 4.First frequency selection module 1, second frequency selection module 2 and third frequency selection module 3 are connected in parallel between antenna 10 and communication chip 4.Antenna 10 is used to receive mobile first frequency band signaling, the second frequency band signaling of communication or the third frequency band signaling of telecommunication.Communication chip 4 is used to control first frequency selection module 1, second frequency selection module 2 and third frequency selection module 3 respectively on-off.First frequency selection module 1, second frequency selection module 2 and third frequency selection module 3 are used to transmit any one frequency band signaling in first frequency band signaling, second frequency band signaling and third frequency band signaling to communication chip 4 when on-off.First frequency selection module 1, second frequency selection module 2 and third frequency selection module 3 respectively transmit different frequency band signalings in first frequency band signaling, second frequency band signaling and third frequency band signaling.

[0037] Specifically, antenna 10 can receive signaling from the cellular base station in the first frequency band of the mobile operator, the second frequency band of the China Unicom operator, and the third frequency band of the China Telecom operator. The first frequency selection module 1, the second frequency selection module 2, and the third frequency selection module 3 are connected in parallel. Each of these modules is designed to allow only signaling signals from a specific frequency band to pass through, while filtering out signaling signals from other frequency bands. For example, when activated, the first frequency selection module 1 can allow the first frequency band signaling from the mobile operator to pass through, while filtering out the second frequency band signaling from the China Unicom operator and the third frequency band signaling from the China Telecom operator. The second frequency selection module 2 can allow the second frequency band signaling from the China Unicom operator to pass through, while filtering out the first frequency band signaling from the mobile operator and the third frequency band signaling from the China Telecom operator. The third frequency selection module 3 can allow the third frequency band signaling from the China Telecom operator to pass through, while filtering out the first frequency band signaling from the mobile operator and the second frequency band signaling from the China Unicom operator. The first frequency selection module 1, the second frequency selection module 2, and the third frequency selection module 3 are adapted to the three frequency bands of the three major operators, that is, when the signaling is connected, the frequency bands of different operators are allowed to pass through, without specific restrictions.

[0038] The communication chip 4 can send control signals to control the first frequency selection module 1, the second frequency selection module 2, and the third frequency selection module 3 to be turned on or off respectively. For example... Figure 1 and Figure 2 As shown, after the communication chip 4 is powered on, it begins to cyclically control the first frequency selection module 1, the second frequency selection module 2, and the third frequency selection module 3 to be on. The communication chip 4 can first send a first switch signal K1 to the first frequency selection module 1 to control it to be on. At this time, the communication chip 4 sends a second switch signal K2 and a third switch signal K3 to the second and third frequency selection modules 2 and 3 to control them to be off. Next, the communication chip 4 sends a second switch signal K2 to the second frequency selection module 2 to control it to be on. At this time, the communication chip 4 sends a first switch signal K1 and a third switch signal K3 to the first and third frequency selection modules 1 and 3 to control them to be off. Then, the communication chip 4 sends a third switch signal K3 to the third frequency selection module 3 to control it to be on. At this time, the communication chip 4 sends a first switch signal K1 and a second switch signal K2 to the first and second frequency selection modules 1 and 2 to control them to be off. Figure 2As can be seen, the first, second and third switch signals K1, K2 and K3 are high, the first, second and third frequency selection modules 1, 2 and 3 are turned on, and the first, second and third switch signals K1, K2 and K3 are low, the first, second and third frequency selection modules 1, 2 and 3 are turned off. The communication chip 4 only controls one of the first, second and third frequency selection modules 1, 2 and 3 to be turned on at the same time, so the signal attenuation problem caused by power distribution does not occur.

[0039] As shown in Figure 1 and Figure 2 , the antenna 10 receives the frequency band signaling of a certain operator repeatedly sent by the cellular base station. As an example, the antenna 10 can receive the frequency band signaling of a mobile operator repeatedly sent by the cellular base station. After the communication terminal responds, the first, second and third frequency selection modules 1, 2 and 3 all receive the frequency band signaling of a certain operator, and the communication chip 4 controls the first, second and third frequency selection modules 1, 2 and 3 to be turned on in a cycle. Due to the frequency selection characteristics of the first, second and third frequency selection modules 1, 2 and 3, only when the frequency band signaling received by the antenna 10 enters the adapted frequency selection module and the frequency selection module is turned on, the frequency band signaling received by the antenna 10 can enter the communication chip 4 in a low-loss manner. As an example, the first frequency selection module 1 can be adapted to the frequency band of the first frequency band signaling of the mobile operator, as shown in Figure 1 and Figure 2 , when the communication chip 4 controls the first, second and third frequency selection modules 1, 2 and 3 to be turned on in the second cycle, when the communication chip 4 controls the first frequency selection module 1 to be turned on, the antenna 10 receives the first frequency band signaling of the mobile operator. The first frequency band signaling of the mobile operator is transmitted to the communication chip 4 through the first frequency selection module 1. After the communication chip 4 processes the first frequency band signaling, it compares the processed first frequency band signaling with the pre-set protocol specified frame header sequence. If the similarity of the processed first frequency band signaling and the pre-set protocol specified frame header sequence exceeds the pre-set value, the communication chip 4 pulls up a pulse of a frame header detection signal T0, and the communication chip 4 continuously outputs the first switch signal K1 as high, the second switch signal K2 and the third switch signal K3 as low, that is, continuously controls the first frequency selection module 1 to be turned on, and the second and third frequency selection modules 2 and 3 to be turned off, so that the subsequent first frequency band signaling of the mobile operator received by the antenna 10 passes through the adapted first frequency selection module 1. The communication chip 4 starts to communicate with the external communication equipment until the communication is completed. After the communication is completed, the communication chip 4 starts to control the first, second and third frequency selection modules 1, 2 and 3 again, to find the signaling of the next operator, and repeats the above process.

[0040] The communication terminal can be attached to the material to track the material in real time, and the communication terminal can move from the coverage range of a base station of any operator to the coverage range of a base station of another operator, so that the real-time inventory tracking of the material is realized.

[0041] The technical scheme of the embodiment of the utility model, set up first frequency module, second frequency module and third frequency module respectively with three operators' frequency band signaling is adapted, communication chip cycle on and off first frequency module, second frequency module and third frequency module, until in certain frequency module on, communication chip receives the similarity of the frame header sequence of the protocol specified in advance and exceeds the preset value of the frequency band signaling, communication chip stops switching the on and off of first frequency module, second frequency module and third frequency module, and communicates with external equipment. Until the communication process is completed and enters a new communication cycle, first frequency module, second frequency module and third frequency module are recycled on and off. The technical scheme of the utility model, through setting up the communication chip without radio frequency channel selection module and three groups of non-power consumption frequency selection modules outside the chip, the roaming function of the three major operators of the passive Internet of Things communication terminal is realized, the problem of realizing the roaming function of the three major operators with high power consumption is solved, and at the same time, the sensitivity of the communication terminal is not affected. Due to the frequency selection characteristics of different frequency selection modules, the anti-interference performance of the communication terminal is greatly improved.

[0042] Optionally, on the basis of each of the above embodiments, Figure 3 Another structure diagram of the Internet of Things communication terminal provided by the embodiment of the utility model is shown in the figure, Figure 3 As shown in the figure, the communication terminal further comprises: a matching network 5. The first end of the matching network 5 is connected with the second end of the first frequency module 1, the second frequency module 2 and the third frequency module 3, and the first end of the first frequency module 1, the second frequency module 2 and the third frequency module 3 is connected with the antenna 10. The second end of the matching network 5 is connected with the communication chip 4. The matching network 5 is used to realize the impedance matching between the input end of the matching network 5 and the output end of the matching network 5.

[0043] Specifically, the communication terminal can further be provided with a matching network 5, which can be connected between the second end of the first frequency selection module 1, the second frequency selection module 2 and the third frequency selection module 3 and the communication chip 4. The matching network 5 can match the impedance of the front-end circuit with the impedance of the back-end circuit. The communication chip 4 can control any one of the first frequency selection module 1, the second frequency selection module 2 and the third frequency selection module 3 to be turned on, and the matching network 5 can match the impedance of the turned-on frequency selection module with the impedance of the circuit module connected with the matching network 5 in the communication chip 4. For example, the communication chip 4 can include an analog demodulation circuit, which is connected with the matching network 5. The matching network 5 can convert the impedance of the turned-on frequency selection module into the impedance matched by the back-end analog demodulation circuit, so as to achieve the maximum power transmission efficiency.

[0044] Optionally, on the basis of each of the above embodiments, Figure 4 is another structural schematic diagram of an Internet of Things communication terminal provided by the embodiment of the present application, as shown in the figure, the first frequency selection module 1 includes: a first radio frequency switch 11 and a first filter unit 12. The first radio frequency switch 11 is connected between the antenna 10 and the first filter unit 12, and the first radio frequency switch 11 is also connected with the communication chip 4. The first filter unit 12 is connected between the first radio frequency switch 11 and the communication chip 4. The communication chip 4 is used for controlling the first radio frequency switch 11 to be turned on or turned off. The first radio frequency switch 11 is used for transmitting the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the first filter unit 12 when turned on. The first filter unit 12 is used for filtering out any two frequency band signalings in the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmitting the unfiltered one frequency band signaling to the communication chip 4. Figure 4

[0045] Specifically, the first frequency selection module 1 can include the first radio frequency switch 11 and the first filter unit 12. One end of the first filter unit 12 is connected with the first radio frequency switch 11, and the other end of the first filter unit 12 can be connected with the matching network. The first filter unit 12 has a frequency selection function, that is, the first filter unit 12 can only allow a certain frequency band of signaling signal to pass. For example, the first filter unit 12 can allow the first frequency band signaling of the mobile operator to pass, and filter out the second frequency band signaling of the Unicom operator and the third frequency band signaling of the telecom operator.

[0046] The communication chip 4 can send a first switch signal K1 to the first radio frequency switch 11 to control the first radio frequency switch 11 to be turned on or turned off. For example, when the first switch signal K1 is high, the first radio frequency switch 11 is turned on, and when the first switch signal K1 is low, the first radio frequency switch 11 is turned off.

[0047] Optionally, on the basis of each of the above embodiments, further referring to Figure 4 ​The first filter unit 12 comprises a surface acoustic wave filter.

[0048] Specifically, the first filter unit 12 can be a surface acoustic wave (SAW) filter. The SAW filter can effectively filter out signaling signals and interference signals of other frequency bands, and effectively improve the quality of the signaling signals of the allowed frequency band.

[0049] Optionally, based on the above embodiments, continuing to refer to Figure 4 The second filter unit 22 is connected between the second radio frequency switch 21 and the communication chip 4. The communication chip 4 is configured to control the second radio frequency switch 21 to be turned on or turned off. When turned on, the second radio frequency switch 21 is configured to transmit the signaling of the first frequency band, the signaling of the second frequency band or the signaling of the third frequency band to the second filter unit 22. The second filter unit 22 is configured to filter out any two frequency bands of the signaling of the first frequency band, the signaling of the second frequency band and the signaling of the third frequency band, and transmit the signaling of the unfiltered frequency band to the communication chip 4.

[0050] Specifically, the second filter unit 22 can comprise a second radio frequency switch 21 and a second filter unit 22. One end of the second filter unit 22 is connected with the second radio frequency switch 21, and the other end of the second filter unit 22 can be connected with the matching network 5. The second filter unit 22 has a frequency selection function, that is, the second filter unit 22 can only allow the signaling of a certain frequency band to pass. For example, the second filter unit 22 can allow the signaling of the second frequency band of the Unicom operator to pass, and filter out the signaling of the first frequency band of the mobile operator and the signaling of the third frequency band of the telecom operator. The first filter unit 12 and the second filter unit 22 allow the signaling of different operators to pass when turned on.

[0051] The communication chip 4 can send a second switch signal K2 to the second radio frequency switch 21 to control the turning on or turning off of the second radio frequency switch 21. For example, when the second switch signal K2 is high, the second radio frequency switch 21 is turned on, and when the second switch signal K2 is low, the second radio frequency switch 21 is turned off.

[0052] Optionally, based on the above embodiments, continuing to refer to Figure 4 The second filter unit 22 comprises a surface acoustic wave filter.

[0053] Specifically, the second filter unit 22 can be a SAW filter. The SAW filter can effectively filter out signaling signals and interference signals of other frequency bands, and effectively improve the quality of the signaling signals of the allowed frequency band.

[0054] Optionally, based on each of the above embodiments, with reference to Figure 4 The third frequency selection module 3 comprises a third radio frequency switch 31 and a third filter unit 32. The third radio frequency switch 31 is connected between the antenna 10 and the third filter unit 32, and is also connected with the communication chip 4. The third filter unit 32 is connected between the third radio frequency switch 31 and the communication chip 4. The communication chip 4 is configured to control the third radio frequency switch 31 to be turned on or turned off. When turned on, the third radio frequency switch 31 is configured to transmit the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the third filter unit 32. The third filter unit 32 is configured to filter out any two frequency band signaling from the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmit the unfiltered frequency band signaling to the communication chip 4.

[0055] Specifically, the third frequency selection module 3 can comprise the third radio frequency switch 31 and the third filter unit 32. One end of the third filter unit 32 is connected with the third radio frequency switch 31, and the other end of the third filter unit 32 can be connected with the matching network 5. The third filter unit 32 has a frequency selection function, i.e. the third filter unit 32 can only allow a certain frequency band of signaling signals to pass. For example, the third filter unit 32 can allow the third frequency band signaling of the telecom operator to pass, and filter out the first frequency band signaling of the mobile operator and the second frequency band signaling of the Unicom operator. The first filter unit 12, the second filter unit 22 and the third filter unit 32 allow different frequency band signaling of different operators to pass when turned on.

[0056] The communication chip 4 can send a third switch signal K3 to the third radio frequency switch 31 to control the third radio frequency switch 31 to be turned on or turned off. For example, when the third switch signal K3 is at a high level, the third radio frequency switch 31 is turned on, and when the third switch signal K3 is at a low level, the third radio frequency switch 31 is turned off.

[0057] Optionally, based on each of the above embodiments, with reference to Figure 4 The third filter unit 32 comprises a surface acoustic wave filter.

[0058] Specifically, the third filter unit 32 can be a SAW filter. The SAW filter can effectively filter out the signaling signals of the remaining frequency bands and the interference signals, and effectively improve the quality of the signaling signals allowed to pass.

[0059] As Figure 2 and Figure 4As shown, the antenna 10 receives the frequency band signaling of a certain operator repeatedly sent by the cellular base station. For example, the antenna 10 can receive the frequency band signaling of a mobile operator repeatedly sent by the cellular base station. After the communication terminal responds, the first radio frequency switch 11, the second radio frequency switch 21 and the third radio frequency switch 31 all receive the frequency band signaling of a certain operator, and the communication chip 4 cyclically controls the first radio frequency switch 11, the second radio frequency switch 21 and the third radio frequency switch 31 to be turned on. Due to the frequency selection characteristics of the first filter unit 12, the second filter unit 22 and the third filter unit 32, only when the frequency band signaling received by the antenna 10 enters the adapted filter unit and the corresponding radio frequency switch is turned on, the frequency band signaling received by the antenna 10 can enter the communication chip 4 in a low-loss manner. For example, the first filter unit 12 can be adapted to the frequency band of the first frequency band signaling of the mobile operator, and the second filter unit 22 and the third filter unit 32 can be adapted to the frequency band of the second frequency band signaling of the mobile operator. Figure 2 and Figure 4 As shown, when the communication chip 4 cyclically controls the first radio frequency switch 11, the second radio frequency switch 21 and the third radio frequency switch 31 to be turned on for the second time, the antenna 10 receives the first frequency band signaling of the mobile operator when the communication chip 4 controls the first radio frequency switch 11 to be turned on. The first frequency band signaling of the mobile operator is transmitted to the matching network 5 through the first radio frequency switch 11 and the first filter unit 12. The matching network 5 matches the impedance of the turned-on frequency selection module with the impedance of the circuit module connected with the matching network 5 in the communication chip 4. After the communication chip 4 receives the first frequency band signaling and processes the first frequency band signaling, the communication chip 4 compares the processed first frequency band signaling with the frame header sequence of the protocol set in advance. If the similarity of the processed first frequency band signaling and the frame header sequence of the protocol set in advance exceeds a preset value, the communication chip 4 pulls up a pulse of a frame header detection signal T0, and the communication chip 4 continuously outputs the first switch signal K1 as high level, the second switch signal K2 and the third switch signal K3 as low level, that is, continuously controls the first radio frequency switch 11 to be turned on and the second radio frequency switch 21 and the third radio frequency switch 31 to be turned off, so that the subsequent first frequency band signaling of the mobile operator received by the antenna 10 passes through the adapted first frequency selection module 1. The communication chip 4 starts to communicate with the external communication equipment until the communication is completed. After the communication is completed, the communication chip 4 starts to cyclically control the first radio frequency switch 11, the second radio frequency switch 21 and the third radio frequency switch 31 again to find the signaling of the next operator, and repeats the above process.

[0060] Optionally, on the basis of the above embodiments, Figure 5 is another structure schematic diagram of the Internet of Things communication terminal provided by the embodiment of the present application, as shown in Figure 5As shown, the communication chip 4 includes an analog demodulation circuit 41 and a digital decoding circuit 42. The analog demodulation circuit 41 is connected between the first frequency selection module 1, the second frequency selection module 2 and the third frequency selection module 3 and the digital decoding circuit 42. The first end of the digital decoding circuit 42 is connected to the analog demodulation circuit 41, and the second end of the digital decoding circuit 42 is connected to the first frequency selection module 1, the second frequency selection module 2 and the third frequency selection module 3. The analog demodulation circuit 41 is used to demodulate the first frequency band signaling, the second frequency band signaling or the third frequency band signaling. The digital decoding circuit 42 is used to control the first frequency selection module 1, the second frequency selection module 2 and the third frequency selection module 3 to turn on or turn off.

[0061] Specifically, the communication chip 4 can include an analog demodulation circuit 41 and a digital decoding circuit 42. One end of the analog demodulation circuit 41 can be connected to the matching network 5, and the other end of the analog demodulation circuit 41 can be connected to the digital decoding circuit 42.

[0062] The communication chip can also include a power management module, such as Figure 2 and Figure 5 As shown, after the communication chip 4 is powered on, the power management module can send a power-on reset signal R0 to the digital decoding circuit 42. After receiving the power-on reset signal R0, the digital decoding circuit 42 starts to control the first radio frequency switch 11, the second radio frequency switch 21 and the third radio frequency switch 31 to turn on or turn off in a loop. The antenna 10 receives the frequency band signaling of a certain operator repeatedly sent by the cellular base station. For example, the antenna 10 can receive the frequency band signaling of a mobile operator repeatedly sent by the cellular base station. After the communication terminal responds, the first radio frequency switch 11, the second radio frequency switch 21 and the third radio frequency switch 31 all receive the frequency band signaling of a certain operator. Due to the frequency selection characteristics of the first filter unit 12, the second filter unit 22 and the third filter unit 32, only when the frequency band signaling received by the antenna 10 enters the adapted filter unit and the corresponding radio frequency switch is turned on, the frequency band signaling received by the antenna 10 can enter the communication chip 4 in a low-loss manner. For example, the first filter unit 12 can be adapted to the frequency band of the first frequency band signaling of a mobile operator, such as Figure 2 and Figure 5As shown, when the communication chip 4 controls the first radio frequency switch 11 to be turned on, the antenna 10 is just receiving the first frequency band signaling of the mobile operator, the first frequency band signaling of the mobile operator is transmitted to the matching network 5 through the first radio frequency switch 11 and the first filter unit 12, the matching network 5 matches the impedance of the turned-on frequency selection module with the impedance of the circuit module connected with the matching network 5 in the communication chip 4, that is, the matching network 5 converts the impedance of the turned-on frequency selection module into the impedance matched by the subsequent analog demodulation circuit 41, so that the analog demodulation circuit 41 demodulates the baseband signaling waveform on the first frequency band signaling with the highest efficiency. The first frequency band signaling, the second frequency band signaling and the third frequency band signaling are all carrier frequency band signaling, and the analog demodulation circuit 41 can demodulate the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, that is, demodulate the baseband signaling waveform on the carrier. The digital decoding module 42 receives the demodulated baseband signaling and successfully analyzes the data whose similarity to the frame header sequence specified by the pre-set protocol exceeds the preset value, and the digital decoding module 42 pulls up a pulse of a frame header detection signal T0, and the digital decoding module 42 continuously outputs the first switch signal K1 as high level and the second switch signal K2 and the third switch signal K3 as low level, that is, continuously controls the first radio frequency switch 11 to be turned on and the second radio frequency switch 21 and the third radio frequency switch 31 to be turned off, so that the subsequent first frequency band signaling of the mobile operator received by the antenna 10 all passes through the adapted first frequency selection module 1. The communication chip 4 starts to communicate with the external communication equipment until the communication is completed. After the communication is completed, the digital decoding module 42 starts to control the first radio frequency switch 11, the second radio frequency switch 21 and the third radio frequency switch 31 again, finds the signaling of the next operator, and repeats the above process.

[0063] The utility model embodiment provides a kind of internet of things communication system, wherein, communication system includes any internet of things communication terminal provided by any embodiment of the above utility model, with the beneficial effects of any internet of things communication terminal provided by any embodiment of the above utility model of the utility model.

[0064] It should be understood that the above-described procedures can be reordered, steps can be added or deleted. For example, the steps described in the utility model can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the utility model can be achieved, which are not limited herein.

[0065] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An Internet of Things communication terminal, characterized by, The application relates to a communication chip and a matching network. The first frequency selection module, the second frequency selection module and the third frequency selection module are connected in parallel between an antenna and the communication chip; the antenna is used for receiving a first frequency band signaling of a mobile phone, a second frequency band signaling of a China Unicom or a third frequency band signaling of a China Telecom. The communication chip is used for controlling the first frequency selection module, the second frequency selection module and the third frequency selection module to be turned on or turned off; the first frequency selection module, the second frequency selection module and the third frequency selection module are used for transmitting any one of the first frequency band signaling, the second frequency band signaling and the third frequency band signaling to the communication chip when turned on; and the first frequency selection module, the second frequency selection module and the third frequency selection module respectively transmit different frequency band signalings of the first frequency band signaling, the second frequency band signaling and the third frequency band signaling. The application further relates to a matching network.

2. The IoT communication terminal according to claim 1, characterized in that, The first end of the matching network is connected with the second end of the first frequency selection module, the second frequency selection module and the third frequency selection module, the first end of the first frequency selection module, the second frequency selection module and the third frequency selection module is connected with the antenna, the second end of the matching network is connected with the communication chip, and the matching network is used for realizing impedance matching between the input end of the matching network and the output end of the matching network. The first frequency selection module comprises a first radio frequency switch and a first filter unit. The first radio frequency switch is connected between the antenna and the first filter unit, and is further connected with the communication chip; the first filter unit is connected between the first radio frequency switch and the communication chip.

3. The IoT communication terminal according to claim 1, characterized in that, The communication chip is used for controlling the first radio frequency switch to be turned on or turned off; the first radio frequency switch is used for transmitting the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the first filter unit when turned on; and the first filter unit is used for filtering any two of the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmitting the unfiltered one to the communication chip. The first filter unit comprises a surface acoustic wave filter. The second frequency selection module comprises a second radio frequency switch and a second filter unit.

4. The IoT communication terminal according to claim 3, characterized in that, The second radio frequency switch is connected between the antenna and the second filter unit, and is further connected with the communication chip; the second filter unit is connected between the second radio frequency switch and the communication chip.

5. The IoT communication terminal of claim 1, wherein, The communication chip is used for controlling the second radio frequency switch to be turned on or turned off; the second radio frequency switch is used for transmitting the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the second filter unit when turned on; and the second filter unit is used for filtering any two of the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmitting the unfiltered one to the communication chip. The second filter unit comprises a surface acoustic wave filter. ​ 6. The IoT communication terminal according to claim 5, characterized in that, ​ 7. The IoT communication terminal of claim 1, wherein, The third frequency selection module comprises a third radio frequency switch and a third filter unit. The third radio frequency switch is connected between the antenna and the third filter unit, and is also connected with the communication chip; the third filter unit is connected between the third radio frequency switch and the communication chip. The communication chip is configured to control the third radio frequency switch to be turned on or turned off; the third radio frequency switch is configured to transmit the first frequency band signaling, the second frequency band signaling or the third frequency band signaling to the third filter unit when turned on; and the third filter unit is configured to filter out any two frequency band signalings from the first frequency band signaling, the second frequency band signaling and the third frequency band signaling, and transmit the unfiltered frequency band signaling to the communication chip.

8. The IoT communication terminal according to claim 7, characterized in that, The third filter unit comprises a surface acoustic wave filter.

9. The IoT communication terminal of claim 1, wherein, The communication chip comprises an analog demodulation circuit and a digital decoding circuit. The analog demodulation circuit is connected between the first frequency selection module, the second frequency selection module and the third frequency selection module and the digital decoding circuit; a first end of the digital decoding circuit is connected with the analog demodulation circuit; and a second end of the digital decoding circuit is connected with the first frequency selection module, the second frequency selection module and the third frequency selection module. The analog demodulation circuit is configured to demodulate the first frequency band signaling, the second frequency band signaling or the third frequency band signaling; and the digital decoding circuit is configured to control the first frequency selection module, the second frequency selection module and the third frequency selection module to be turned on or turned off.

10. An Internet of Things communication system, characterized by The Internet of Things communication terminal comprises any one of the devices according to claims 1-9.

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