CN212305326U

CN212305326U - Highly integrated NB-IoT wireless communication module

Info

Publication number: CN212305326U
Application number: CN202021062415.9U
Authority: CN
Inventors: 毛樟梅; 刘高云; 苏红飞; 于海波
Original assignee: Zhejiang Lianxin Internet Of Things Technology Co ltd
Current assignee: ZHEJIANG LIERDA INTERNET OF THINGS TECHNOLOGY Co.,Ltd.
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-01-05
Anticipated expiration: 2030-06-10

Abstract

The utility model discloses a high integrated NB-IoT wireless communication module, handle the chip including NB-IoT SoC, NB-IoT SoC handles the chip and includes power management unit PMU, embedded treater ARM CPU, peripheral equipment Peripherals and communication subsystem, NB-IoT SoC handles the chip and links to each other with external power supply VBAT, external output power VDD _ IO, peripheral hardware interface, radio frequency switch, two external clock sources simultaneously. According to the technical scheme, the NB-IoT wireless communication module is adopted, the supported frequency band coverage capacity is high, the high-frequency and low-frequency signals cover the domestic working frequency band requirement and part of the foreign frequency band requirement, the power consumption is reduced to the nanoampere level from microampere in the low-power-consumption mode, the overall power consumption of the equipment is reduced to the maximum extent, the ultra-long-time standby is realized, and the NB-IoT processor is few in peripheral circuits and complete in function.

Description

Highly integrated NB-IoT wireless communication module

Technical Field

The utility model relates to a wireless communication field especially relates to a high NB-IoT wireless communication module that integrates.

Background

With the continuous development of the internet of things in a big market, in order to meet the connection requirements of the internet of things, a low-power-consumption wide area network (LPWAN) comes along, and the LPWAN is specially designed for the application of the internet of things with low bandwidth, low power consumption, long distance and a large number of connections. The NB-IoT is taken as an authorized frequency band Internet of things technology, is used for connecting various intelligent sensors and equipment using a wireless cellular network based on a cellular technology, focuses on low-power consumption and wide-coverage Internet of things IoT market, and is an emerging technology which can be widely applied in the global scope. The NB-IoT technology can continuously go deep into all trades of the Internet of things, and has 4 major characteristics: low power consumption, low cost, strong connection and wide coverage.

The existing NB-IoT wireless communication module scheme is based on various combinations of a multi-core processor, external power supply control, an external power amplifier, a filter, a balun, a radio frequency switch and the like, so that uA-level standby power consumption and cost of the module cannot be extremely low, application thresholds in partial fields such as smoke feeling and requirements of wearable markets on low power consumption capacity are limited, and the fields cannot be widely popularized and applied due to high sensitivity of the wearable markets and logistics industries on low cost.

Chinese patent document CN108156652A discloses an "NB-IoT based wireless communication module". The method comprises the following steps: a radio frequency power amplifier module; the Boost module comprises an enabling end, an input end and an output end; the NB-IoT processor comprises a GPIO port and a user identity identification module; the enabling end is electrically connected with the GPIO port, and the output end is electrically connected with the power supply end of the radio frequency power amplifier module and the power supply end of the user identity identification module respectively; when the NB-IoT processor enters a power saving mode, the GPIO port is changed from high level to low level, the enable end is low level, and no output voltage exists at the output end. The peripheral circuits required by the technical scheme are more, and the wearable equipment is not suitable for the field with higher requirements on the equal-volume energy consumption of the wearable equipment.

Disclosure of Invention

The utility model discloses mainly solve original technical problem, a highly integrated NB-IoT wireless communication module is provided, adopt NB-IoT wireless communication module, the frequency channel that supports covers the ability height, high frequency and low frequency signal cover domestic work frequency channel demand and the frequency channel demand of part foreign country, under the low power consumption mode, the consumption is reduced to the nanoampere rank by microampere, furthest has reduced the whole consumption of equipment, realize the standby for overlength time, and the peripheral hardware circuit of NB-IoT treater demand is few, it is multiple functional.

The above technical problem of the present invention can be solved by the following technical solutions: the utility model discloses a chip is handled to NB-IoT SoC, the chip is handled to NB-IoT SoC includes power management unit PMU, embedded treater ARM CPU, peripheral equipment Peripherals and communication subsystem, NB-IoT SoC handles the chip and links to each other with external power supply VBAT, external output power VDD _ IO, peripheral hardware interface, radio frequency switch, two external clock sources simultaneously.

Preferably, the PMU power management unit includes a dc power conversion circuit DCDC, an external power supply VBAT inputting a wide voltage of 2.2V to 4.5V is connected to the PMU, and the PMU is simultaneously connected to an external output power VDD _ IO having a driving capability of 120mA output current.

Preferably, a TVS tube is disposed between the external power supply VBAT and the power management unit PMU. The TVS tube effectively enhances the overvoltage protection and surge prevention capability of the module.

Preferably, the communication subsystem includes a wireless transceiver unit, an amplifier unit and a control IO. And controlling IO to realize the on-off control capability of the NB-IoT processor on the radio frequency switch, and acting on the on-off control of the 6 wireless channels in the structure diagram.

Preferably, a plurality of wireless paths are arranged between the communication subsystem and the radio frequency switch, and part of the wireless paths are connected with the radio frequency switch through the LC circuit. The wireless channel comprises a high-frequency high-power signal transmitting port, a high-frequency low-power signal transmitting port, a low-frequency high-power signal transmitting port, a low-frequency low-power signal transmitting port, a high-frequency signal receiving port and a low-frequency signal receiving port. The wireless communication signal respectively realizes the transmission of high power and low power signals through 2 high-frequency signal transmitting ports and 2 low-frequency signal transmitting ports corresponding to different electric connection modes, the reception of the wireless communication signal is realized through a low-frequency signal receiving port and a high-frequency signal receiving port corresponding to different electric connection modes, 6 ports of the wireless communication signal realize the on-off selection of lines in a plurality of wireless paths through the control IO of a processor, and an LC circuit in the paths can be used as a filter or a circuit impedance matching circuit to ensure that the wireless performance of the module is optimal.

Preferably, the peripheral interfaces include a SIM card interface USIM, a serial port MAIN uarn UART, a DBG UART, a RESET interface RESET, and rich functional interfaces. The peripheral interfaces available for the NB-IoT module are not limited to the description herein, and the functions of each peripheral can be mapped according to actual needs, and can be used as different functions, such as I2C, SPI, PWM, and other definitions that the NB-IoT processor can implement.

Preferably, the radio frequency switch is connected with the antenna ANT _ RFIO through an LC circuit. The LC circuit can be used as a filter or a circuit impedance matching circuit, and has the function of ensuring that the wireless performance of the module is optimal.

Preferably, an ESD device is disposed between the LC circuit and the antenna ANT _ RFIO. The antistatic ability of the module is enhanced.

The utility model has the advantages that:

the frequency band coverage capability supported by the NB-IoT wireless communication module is high, and high-frequency and low-frequency signals can completely cover the working frequency band requirements of three operators in China and also support part of the frequency band requirements in foreign countries.

2. In the low power consumption mode, the power consumption is reduced to nA level from uA, the whole power consumption of the equipment is reduced to the maximum extent, and the standby for a super-long time is realized.

And 3, the NB-IoT processor requires few peripheral circuits and has complete functions.

4. For the application occasion of battery power supply, the energy consumption is reduced, the service life of the NB-IoT equipment is prolonged, and the application scene of the NB-IoT technology is widened.

5. In terms of cost, the cost of each module can be reduced by at least 30% compared with the existing module, and according to the existing estimated NB-IoT shipment volume in 2020, cost saving can be effectively realized, and great social and economic benefits are brought.

Drawings

Fig. 1 is a block diagram of a circuit principle connection structure of the present invention.

In the figure, 1 PMU, 2 ARM CPU, 3 Peripherals, 4 communication subsystems, 5 VBAT, 6 VDD _ IO, 7 DCDC, 8 clock sources, 9 peripheral interfaces, 10 LC circuits, 11 radio frequency switches, 12 TVS tubes and 13 ESD devices are adopted.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): the highly integrated NB-IoT wireless communication module of the present embodiment, as shown in fig. 1, includes an NB-IoT SoC processing chip, and while the NB-IoT processor chip satisfies all existing functions, because a power regulator of a power amplifier, a filter, a balun, and a power amplifier is built in the processor chip, a power switch required under a low power consumption requirement is eliminated, crystal oscillator circuits compatible with different specifications can adopt crystal oscillator specifications with different costs as needed, and a brand new chip architecture is adopted, and these designs effectively reduce power consumption and cost. The NB-IoT SoC processing chip comprises a power management unit PMU1, an embedded processor ARM CPU2, peripheral devices Peripherals3 and a communication subsystem 4, wherein the power management unit PMU1 and the embedded processor ARM CPU2 are respectively externally connected with a clock source 8. The main crystal oscillator of the processor can adopt different specifications of an active temperature compensation crystal oscillator TCXO and a passive crystal oscillator DCXO.

The PMU power management unit 1 comprises a DC power supply conversion circuit DCDC7, an external power supply VBAT5 for inputting wide voltage of 2.2V-4.5V is connected with the PMU1, and the PMU1 is simultaneously connected with an external output power VDD _ IO6 with the driving capability of 120mA output current. VBAT provides wide voltage input capability while providing a high performance power protection circuit. A TVS tube 12 is provided between the external power supply VBAT5 and the power management unit PMU 1. The TVS tube effectively enhances the overvoltage protection and surge prevention capability of the module.

The communication subsystem 4 includes a radio transceiver unit, an amplifier unit and a control IO. A plurality of wireless paths are arranged between the communication subsystem 4 and the radio frequency switch 11, and part of the wireless paths are connected with the radio frequency switch 11 through the LC circuit 10. The wireless channel comprises a high-frequency high-power signal transmitting port, a high-frequency low-power signal transmitting port, a low-frequency high-power signal transmitting port, a low-frequency low-power signal transmitting port, a high-frequency signal receiving port and a low-frequency signal receiving port. The wireless communication signals are respectively transmitted through the 2 high-frequency signal transmitting ports and the 2 low-frequency signal transmitting ports in different corresponding electric connection modes to realize high-power and low-power signal transmission. The receiving of wireless communication signals is realized through the corresponding different electric connection modes of the low-frequency signal receiving port and the high-frequency signal receiving port, the 6 ports are switched on and off through the control IO of the processor to select lines in a plurality of wireless channels, and LC circuits in the channels can be used as filters or circuit impedance matching circuits to ensure that the wireless performance of the module is optimal. And controlling IO to realize the on-off control capability of the NB-IoT processor on the radio frequency switch, and acting on the on-off control of the 6 wireless channels in the structure diagram.

The peripheral interface 9 comprises a SIM card interface USIM, a serial port MAIN UART, a DBG UART, a RESET interface RESET and rich functional interfaces. The peripheral interfaces available for the NB-IoT module are not limited to the description herein, and the functions of each peripheral can be mapped according to actual needs, and can be used as different functions, such as I2C, SPI, PWM, and other definitions that the NB-IoT processor can implement.

The radio frequency switch 11 is connected to the antenna ANT _ RFIO via the LC circuit 10. The LC circuit 10 may be used as a filter or a circuit impedance matching circuit, and is used to ensure that the wireless performance of the module is optimized. An ESD device 13 is provided between the LC circuit 10 and the antenna ANT _ RFIO. ESD electrostatic impeders are used to enhance the module's antistatic ability.

When the module is used, an external power supply VBAT supplies power to the module, the input voltage range of the VBAT is 2.2-4.5V, and the power input end is connected with a TVS tube, so that the overvoltage protection and surge prevention capability of the module is effectively enhanced. The processor simultaneously provides a driving capability of 120mA and an output current of VDD _ IO to the outside. The external 2 clock sources of treater, wireless communication signal realizes high power and low-power signal's transmission through 2 high frequency signal transmission ports and 2 low frequency signal transmission ports correspond different electric connection mode respectively, the electric connection mode who corresponds different through low frequency signal receiving port and high frequency signal receiving port realizes wireless communication signal's receipt, its 6 ports realize the break-make selection through the control IO of treater, the link of antenna has increased the ESD device, can strengthen the antistatic effect of module. The NB-IoT wireless communication module provides rich peripheral equipment, and comprises a necessary SIM card interface, a serial port MAIN UART, a DBG UART, a RESET interface RESET and rich functional interfaces.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although VBAT, VDD _ IO, clock source, etc. terms are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The high-integration NB-IoT wireless communication module is characterized by comprising an NB-IoT SoC processing chip, wherein the NB-IoT SoC processing chip comprises a Power Management Unit (PMU) (power management unit) (1), an embedded processor (ARM) CPU (2), peripheral equipment (Peripherals (3) and a communication subsystem (4), and is connected with an external power supply (VBAT) (5), an external output power supply (VDD _ IO (6), a peripheral interface (9) and a radio frequency switch (11) and is externally connected with two clock sources (8).

2. The high-integration NB-IoT wireless communication module according to claim 1, wherein the PMU power management unit (1) comprises a DC power conversion circuit DCDC (7), an external power supply VBAT (5) inputting wide voltage of 2.2V-4.5V is connected with the PMU (1), and the PMU (1) is connected with an external output power VDD _ IO (6) having a driving capability of 120mA output current.

3. A highly integrated NB-IoT wireless communication module according to claim 1 or 2, characterized by a TVS tube (12) between the external power supply VBAT (5) and the power management unit PMU (1).

4. A highly integrated NB-IoT wireless communication module according to claim 1, wherein the communication subsystem (4) comprises a wireless transceiver unit, an amplifier unit and a control IO.

5. The high-integration NB-IoT wireless communication module as claimed in claim 1, wherein a plurality of wireless paths are provided between the communication subsystem (4) and the radio frequency switch (11), and part of the wireless paths are connected to the radio frequency switch (11) via the LC circuit (10).

6. A highly integrated NB-IoT wireless communication module according to claim 1, characterized in that the peripheral interfaces (9) include SIM card interface USIM, serial MAIN UART, DBG UART and RESET interface RESET.

7. A highly integrated NB-IoT wireless communication module according to claim 1, wherein the rf switch (11) is connected to the antenna ANT _ RFIO via the LC circuit (10).

8. A highly integrated NB-IoT wireless communication module according to claim 7 characterized in that between the LC circuit (10) and the antenna ANT _ RFIO there is provided an ESD device (13).