CN113347737A

CN113347737A - Network device and wireless communication system

Info

Publication number: CN113347737A
Application number: CN202010098769.7A
Authority: CN
Inventors: 胡龙飞; 宋志强; 张乐; 蒋顺吉; 徐舟; 张国鑫
Original assignee: China Mobile Communications Group Co Ltd; China Mobile IoT Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile IoT Co Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2021-09-03

Abstract

The invention provides a network device and a wireless communication system, wherein the network device comprises a processor, a Wi-Fi module, a frequency conversion module and an antenna, wherein the processor is electrically connected with the Wi-Fi module; the processor is used for receiving signals transmitted by the Wi-Fi module or transmitting signals to the Wi-Fi module; in a direct connection working mode, the frequency conversion module is used for directly transmitting a first signal transmitted by the Wi-Fi module to the antenna or directly transmitting a second signal transmitted by the antenna to the Wi-Fi module; in the frequency conversion working mode, the frequency conversion module is used for adjusting the frequency of a first signal transmitted by the Wi-Fi module to a first target frequency under the control of the processor, wherein the first target frequency is not in the working frequency band of the Wi-Fi module, or adjusting the frequency of a second signal transmitted by the antenna to a second target frequency under the control of the processor, and the second target frequency is in the working frequency band of the Wi-Fi module. The invention can improve the flexibility of the network equipment in wireless communication.

Description

Network device and wireless communication system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a network device and a wireless communication system.

Background

In recent years, Wireless-Fidelity (Wi-Fi) technology has become popular, and network devices using Wi-Fi technology have become more abundant. When the existing network device utilizes Wi-Fi to perform wireless communication, the communication frequency band is fixed and unchanged, which results in poor flexibility when the existing network device performs wireless communication.

Disclosure of Invention

The embodiment of the invention provides network equipment and a wireless communication system, and aims to solve the problem that the existing network equipment is poor in flexibility when wireless communication is carried out.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a network device, including: the wireless fidelity system comprises a processor, a wireless fidelity Wi-Fi module, a frequency conversion module and an antenna, wherein the processor is electrically connected with the Wi-Fi module, the Wi-Fi module is connected with the antenna through the frequency conversion module, and the processor is electrically connected with the frequency conversion module;

the processor is used for receiving signals transmitted by the Wi-Fi module or transmitting signals to the Wi-Fi module;

the frequency conversion module has a direct connection working mode and a frequency conversion working mode;

in the direct connection working mode, the frequency conversion module is used for directly transmitting a first signal transmitted by the Wi-Fi module to the antenna, or is used for directly transmitting a second signal transmitted by the antenna to the Wi-Fi module;

in the frequency conversion working mode, the frequency conversion module is configured to adjust, under the control of the processor, a frequency of a first signal transmitted by the Wi-Fi module to a first target frequency, where the first target frequency is not in a working frequency band of the Wi-Fi module, or adjust, under the control of the processor, a frequency of a second signal transmitted by the antenna to a second target frequency, where the second target frequency is in the working frequency band of the Wi-Fi module.

Optionally, the working frequency band of the Wi-Fi module is an Industrial Scientific Medical (ISM) frequency band.

Optionally, the number of the antennas is N, the frequency conversion module has N first interfaces and N second interfaces, the N first interfaces are all electrically connected to the Wi-Fi module, and the N second interfaces are electrically connected to the N antennas in a one-to-one correspondence manner;

and N is a positive integer.

Optionally, the frequency conversion module includes a local oscillator phase-locked loop and N work units, the local oscillator phase-locked loop is electrically connected with the N work units respectively, the N work units are electrically connected with the N first interface one-to-one correspondence, and the N work units are electrically connected with the N second interface one-to-one correspondence.

Optionally, each working unit includes a first radio frequency switch, a numerical control attenuator, an intermediate frequency filter, a mixer, a radio frequency filter, a second radio frequency switch, a radio frequency front end, a low pass filter, a third radio frequency switch, and a local oscillator amplifier;

the first radio frequency switch is respectively connected with a corresponding first interface, the third radio frequency switch and the numerical control attenuator, the numerical control attenuator is electrically connected with the intermediate frequency filter, the frequency mixer is respectively connected with the intermediate frequency filter, the local oscillator amplifier and the radio frequency filter, the radio frequency filter is electrically connected with the second radio frequency switch, the radio frequency front end is respectively connected with the second radio frequency switch and the low pass filter, the third radio frequency switch is respectively electrically connected with the low pass filter and a corresponding second interface, and the local oscillator amplifier is electrically connected with the local oscillator phase-locked loop.

Optionally, the network device further includes:

the interface module comprises a mode switch, and the mode switch is electrically connected with the frequency conversion module and used for switching the working mode of the frequency conversion module.

Optionally, the network device further includes:

the interface module comprises a peripheral interface which is electrically connected with the processor; and/or the presence of a gas in the gas,

the interface module further comprises a debugging and maintaining interface which is electrically connected with the processor.

Optionally, the network device is an Access Point (AP) terminal or a wireless Station (STA) terminal.

In a second aspect, an embodiment of the present invention further provides a wireless communication system, including an AP terminal and at least one STA terminal, where the AP terminal includes the network device provided in the first aspect, each STA terminal includes the network device provided in the first aspect, and each STA terminal is wirelessly connected to the AP terminal.

Optionally, each STA terminal further includes a monitoring module, and the monitoring module of each STA terminal is electrically connected to the processor of the STA terminal.

In the embodiment of the invention, because the frequency conversion module is arranged between the WI-FI module and the antenna, the frequency conversion module can not carry out frequency conversion processing on the passing signals in a direct connection working mode, at the moment, the communication frequency band of the network equipment is the working frequency band of the WI-FI module, the frequency conversion module can carry out frequency conversion processing on the passing signals in the frequency conversion working mode, and at the moment, the communication frequency band of the network equipment is a frequency band except the working frequency band of the WI-FI module, so that the network equipment can switch and use different communication frequency bands.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is one of the structural diagrams of a network device according to an embodiment of the present invention;

fig. 2 is a second block diagram of a network device according to an embodiment of the present invention;

fig. 3 is a structural diagram of a frequency conversion module of a network device according to an embodiment of the present invention;

fig. 4 is a block diagram of a wireless communication system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to fig. 3, an embodiment of the present invention provides a network device 1, including: the device comprises a processor 11, a Wi-Fi module 13, a frequency conversion module 14 and an antenna 15, wherein the processor 11 is electrically connected with the Wi-Fi module 13, the Wi-Fi module 13 is connected with the antenna 15 through the frequency conversion module 14, and the processor 11 is electrically connected with the frequency conversion module 14;

the processor 11 is used for receiving the signal transmitted by the Wi-Fi module 13 or transmitting the signal to the Wi-Fi module 13;

the frequency conversion module 14 has a direct connection working mode and a frequency conversion working mode;

in the direct connection operating mode, the frequency conversion module 14 is configured to directly transmit a first signal transmitted by the Wi-Fi module 13 to the antenna 15, or directly transmit a second signal transmitted by the antenna 15 to the Wi-Fi module 13;

in the frequency conversion operating mode, the frequency conversion module 14 is configured to adjust, under the control of the processor 11, a frequency of a first signal transmitted by the Wi-Fi module 13 to a first target frequency, where the first target frequency is not in an operating frequency band of the Wi-Fi module 13, or adjust, under the control of the processor 11, a frequency of a second signal transmitted by the antenna 15 to a second target frequency, where the second target frequency is in the operating frequency band of the Wi-Fi module 13.

The network device 1 may be an AP terminal, such as a router or other device with a wireless access point function. The network Device 1 may also be an STA terminal, such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a monitoring Device.

As shown in fig. 2, in some embodiments, when the network device 1 is an STA terminal, the network device 1 may further include a monitoring module 16, and the monitoring module 16 is electrically connected to the processor 11. The monitoring module 16 may be configured to collect monitoring data and transmit the monitoring data to the processor of the network device 1; in particular, the monitoring module 16 may be composed of a high-definition camera and an image processing circuit. The processor 11 may be configured to control the operation of the monitoring module 16, and to receive and process the monitoring data.

The processor 11 may include a micro operating system, and may have functions of data processing, logic control, timing control, and Internet Protocol (IP) packet switching. In particular, the processor 11 described above may be used to process and convert data; the processor 11 may also be used to drive and control the Wi-Fi module 13; the processor 11 may also be configured to control the operation of the frequency conversion module 14 in the frequency conversion operation mode, that is, how the frequency conversion module 14 operates in the frequency conversion operation mode may be controlled by the processor 11.

The Wi-Fi module 13 may be used for Wi-Fi wireless channel communication, and may specifically be a general Wi-Fi chip or module on the market. The Wi-Fi module 13 may be a chip or a module supporting ieee802.11n, a 40MHz channel bandwidth, a 2412 MHz-2483.5 MHz working band, and 2 × 2 MIMO.

The antenna 15 may have a plurality of effective operating frequency bands, and specifically, the antenna 15 may be used to transmit or receive signals of the operating frequency band of the Wi-Fi module 13, and may also be used to transmit or receive signals of other frequency bands except the operating frequency band of the Wi-Fi module 13.

The working frequency band of the Wi-Fi module 13 may include one or more sub-frequency bands in the ISM frequency band, where the sub-frequency band may be a frequency band with a frequency range of 2400MHz to 2483.5MHz, or a frequency band with a frequency range of 5.725 to 5.875 GHz.

The fact that the first target frequency is not in the operating frequency band of the Wi-Fi module 13 may be understood as: the first target frequency is not included in the operating frequency band of the Wi-Fi module 13, for example, assuming that the operating frequency band of the Wi-Fi module 13 is 2400MHz to 2483.5MHz, the first target frequency may be 653MHz or 6326 MHz. The first target frequency may be any frequency not in the operating band of the Wi-Fi module 13.

The above-mentioned second target frequency in the working frequency band of the Wi-Fi module 13 may be understood as: the second target frequency is included in the working frequency band of the Wi-Fi module 13, for example, assuming that the working frequency band of the Wi-Fi module 13 is 2400MHz to 2483.5MHz, the first target frequency may be 2422MHz, 2442MHz, or 2472 MHz. The second target frequency may be any frequency in the operating band of the Wi-Fi module 13.

In the embodiment of the invention, because the frequency conversion module is arranged between the Wi-Fi module and the antenna, the frequency conversion module can not carry out frequency conversion processing on the passing signal in a direct connection working mode, at the moment, the communication frequency band of the network equipment is the working frequency band of the Wi-Fi module, the frequency conversion module can carry out frequency conversion processing on the passing signal in the frequency conversion working mode, at the moment, the communication frequency band of the network equipment is a frequency band except the working frequency band of the Wi-Fi module, so that the network equipment can switch and use different communication frequency bands, compared with the network equipment with a fixed communication frequency band in the prior art, the flexibility of the network equipment in wireless communication can be improved, the network equipment can meet more application scenes, the current working channel frequency is more difficult to obtain from the outside, and the cracking difficulty of a wireless channel can be improved, the probability of invasion through a wireless channel is reduced, and the safety during data transmission is improved. In addition, because the network device can switch to use different communication frequency bands, when more users use one of the communication frequency bands and mutual interference is easily formed to cause poor data transmission rate and/or data transmission quality, the data transmission rate and/or data transmission quality can be guaranteed by switching to use the other communication frequency band, so that compared with the network device with a fixed communication frequency band in the prior art, the data transmission rate and data transmission quality guarantee capability in wireless communication of the embodiment of the invention is stronger.

Optionally, the working frequency band of the Wi-Fi module 13 is an ISM frequency band.

The ISM band may include one or more sub-bands, for example, the ISM band may include a sub-band with a frequency range of 2400MHz to 2483.5MHz and a sub-band with a frequency range of 5.725 to 5.875 GHz.

The Wi-F module of the embodiment of the invention can adopt the existing Wi-Fi module on the market, thereby reducing the manufacturing cost, and when the working frequency band of the Wi-Fi module is ISM, the network equipment can switch the ISM frequency band and the non-ISM frequency band for communication, but not only can use the fixed working frequency band for communication, thereby reducing the probability of cracking the wireless channel when the network equipment utilizes the Wi-Fi module for wireless communication.

Optionally, the number of the antennas 15 is N, the frequency conversion module 14 has N first interfaces 1412 and N second interfaces 1413, the N first interfaces 1412 are electrically connected to the Wi-Fi module 13, and the N second interfaces 1413 are electrically connected to the N antennas 15 in a one-to-one correspondence;

and N is a positive integer.

Wherein, N may be 1, 2 or other positive integer greater than 2.

Because the N first interfaces of the frequency conversion module are electrically connected with the Wi-Fi module, and the N second interfaces of the frequency conversion module are electrically connected with the N antennas in a one-to-one correspondence manner, the embodiment of the invention can support the frequency conversion processing of a Multiple Input Multiple Output (MIMO) antenna, thereby further improving the wireless communication speed and having very important significance in solving the problem of multi-user large-flow service.

Optionally, the frequency conversion module 14 includes a local oscillator phase-locked loop 1410 and N working units, where the local oscillator phase-locked loop 1410 is electrically connected to the N working units, the N working units are electrically connected to the N first interfaces 1412 in a one-to-one correspondence, and the N working units are electrically connected to the N second interfaces 1413 in a one-to-one correspondence.

The local oscillator phase-locked loop 1410 may be configured to generate N local oscillator signals required by the N working units, and specifically, the N local oscillator signals may be in one-to-one correspondence with the N working units. The local pll 1410 may be electrically connected to the processor 11, and when the local pll 1410 is electrically connected to the processor 11, the configuration of the local pll 1410 may be controlled by the processor 11, for example, the frequency of the local pll 1410 may be controlled by the controller 11. In addition, the local oscillator phase-locked loop 1410 and the Wi-Fi module 13 may refer to the same reference crystal, so that the purpose of homology may be achieved, and the system stability may be enhanced.

Each of the N work units may be configured to: in the frequency conversion working mode, the frequency of the wireless signal is adjusted by performing attenuation, frequency mixing, filtering, amplification and other processing on the wireless signal transmitted by the Wi-Fi module 13.

Because N work units share a local oscillator phase-locked loop, the phase consistency of N local oscillator signals can be better guaranteed, and in addition, other parts of the frequency conversion module except the local oscillator phase-locked loop are N paths, so that the consistency of the frequency conversion of N antennas can be better guaranteed.

It should be noted that, in other embodiments, each of the N working units may be separately configured with one local oscillator phase-locked loop 1410, that is, the number of the local oscillator phase-locked loops 1410 may be N, at this time, the N local oscillator phase-locked loops 1410 are electrically connected to the N working units in a one-to-one correspondence, and each local oscillator phase-locked loop 1410 is used to generate a local oscillator signal required by the corresponding working unit, which is not limited in this embodiment of the present invention.

Optionally, each working unit includes a first radio frequency switch 141, a numerical control attenuator 142, an intermediate frequency filter 143, a mixer 144, a radio frequency filter 145, a second radio frequency switch 146, a radio frequency front end 147, a low pass filter 148, a third radio frequency switch 149, and a local oscillator amplifier 1411;

the first rf switch 141 is electrically connected to the corresponding first interface 1412, the third rf switch 149, and the digitally controlled attenuator 142, the digitally controlled attenuator 142 is electrically connected to the intermediate frequency filter 143, the mixer 144 is electrically connected to the intermediate frequency filter 143, the local oscillator amplifier 1411, and the rf filter 145, the rf filter 145 is electrically connected to the second rf switch 146, the rf front end 147 is electrically connected to the second rf switch 146 and the low pass filter 148, the third rf switch 149 is electrically connected to the low pass filter 148 and the corresponding second interface 1413, and the local oscillator amplifier 1411 is electrically connected to the local oscillator phase-locked loop 1410.

The local oscillator amplifier 1411 may be used to: under the condition that the local oscillation signal output by the local oscillation phase-locked loop 1410 has insufficient power, the local oscillation signal is amplified to ensure that the frequency mixer 144 is in a very linear working state.

The first rf switch 141 may be an rf switch with an isolation degree greater than or equal to a first preset isolation degree; the third rf switch 149 may be an rf switch with an isolation degree greater than or equal to a second preset isolation degree; here, the first predetermined isolation may be equal to or different from the first predetermined isolation.

The first rf switch 141 and the third rf switch 149 may be used to jointly determine the operation mode of the frequency conversion module. Specifically, the first rf switch 141 may include a first connection end, a second connection end, and a third connection end, and the third rf switch 149 may include a fourth connection end, a fifth connection end, and a sixth connection end, wherein the first connection end of the first rf switch 141 may be electrically connected to the corresponding first interface 1412, the second connection end of the first rf switch 141 may be electrically connected to the fourth connection end of the third rf switch 149, the third connection end of the first rf switch 141 may be electrically connected to the digitally controlled attenuator 142, the fifth connection end of the third rf switch 149 may be electrically connected to the low pass filter 148, the sixth connection end of the third rf switch 149 may be electrically connected to the corresponding second interface 1413, the first connection end of the first rf switch 141 may switch between the second connection end and the third connection end, the sixth connection end of the third rf switch 149 may switch between the fourth connection end and the fifth connection end, thus, when the first connection end of the first rf switch 141 is in a state of being connected to the second connection end and the sixth connection end of the third rf switch 149 is in a state of being connected to the fourth connection end, the frequency conversion module is in a through operation mode by directly transmitting a signal between the first rf switch 141 and the third rf switch 149, and when the first connection end of the first rf switch 141 is in a state of being connected to the third connection end and the sixth connection end of the third rf switch 149 is in a state of being connected to the fifth connection end, the frequency conversion module 14 is in a frequency conversion operation mode by transmitting a signal between the first rf switch 141 and the third rf switch 149 through the digitally controlled attenuator 142, the intermediate frequency filter 143, the mixer 144, the rf filter 145, the second rf switch 146, the rf front end 147, and the low pass filter 148.

In addition, both the first rf switch 141 and the third rf switch 149 may be electrically connected to the processor 11.

The digital control attenuator 142 may be configured to attenuate a transmission signal of the Wi-Fi module 13 to a certain extent when the network device 1 transmits the signal, so as to prevent the mixer 144 from being saturated to generate signal compression distortion; the digitally controlled attenuator 142 may not attenuate a signal received by the network device 1. The above-mentioned digitally controlled attenuator 142 may be electrically connected to the processor 11, and when the digitally controlled attenuator 142 is electrically connected to the processor 11, the transceiver attenuation control of the digitally controlled attenuator 142 may be controlled by the processor 11, that is, the operation of the digitally controlled attenuator 142 is controlled by the processor 11.

The function of the if filter 143 may be: filtering the signals transmitted and received by the Wi-Fi module 13, and filtering out harmonic components in the mixer 144 and image frequencies generated by mixing; specifically, the intermediate frequency filter 143 may be a band pass filter.

The center frequency of the intermediate frequency filter 143 may be the center frequency of the channel with the best working performance of the Wi-Fi module 13, and the 1dB bandwidth thereof may be greater than 40MHz, so that other interference signals may be effectively suppressed. The operating frequency of the Wi-Fi module 13 may be set to the center frequency of the intermediate frequency filter 143.

The frequency band range of the intermediate frequency filter 143 may include 2400 + 2490MHz, so that it may be ensured that the Wi-Fi module 13 may select any channel to operate within the 2.4GHz operating frequency band.

The mixer 144 may be used to frequency convert the operating frequency of the Wi-Fi module 13. The mixer 144 may be a passive microwave broadband mixer, an active mixer, or a bi-directional mixer constructed by separate components.

Specifically, after the Wi-Fi module 13 selects the operating frequency IF, the actual operating frequency RF of the radio frequency may be equal to IF-LO, and the actual operating frequency RF of the radio frequency may also be equal to IF + LO, where LO represents the frequency of the local oscillator phase-locked loop 1410. The RF frequency can be selected from the frequency band of 600-800MHz, and the signal penetration capability is stronger and the interference is less when the frequency band is selected.

The rf filter 145 may function as: harmonic and image frequency components in the mixer 144 are filtered out, reducing the possibility of spurious generation by the mixer 144. Specifically, the rf filter 145 may be a band pass filter. The frequency band range of the RF filter 145 may correspond to a selected RF frequency RF.

The second rf switch 146 may be used in conjunction with the rf front end 147, and specifically, the second rf switch 146 may be used to perform time division amplification on the received and transmitted signals. The second rf switch 146 may be electrically connected to the processor 11, and when the second rf switch 146 is electrically connected to the processor 11, the switch control of the second rf switch 146 may be performed by the processor 11.

The rf front end 147 may be used to compensate for system loss caused by the mixer 144, the filter, etc. to reduce the loss difference between the frequency conversion module 14 in the frequency conversion operation mode and the pass-through operation mode. The operating frequency band of the RF front end 147 may correspond to a selected RF frequency RF. The rf front end 147 may be electrically connected to the processor 11, and when the rf front end 147 is electrically connected to the processor 11, the transceiver and the switch control of the rf front end 147 may be performed by the processor 11. In addition, in practical applications, the rf front end 147 may be replaced by a separate power amplifier, low noise amplifier, and rf switch.

The low pass filter 148 may be used to filter out high frequency interference signals to reduce the signal noise floor input to the low noise amplifier front and reduce the system noise figure. The cut-off frequency of the low-pass filter 148 may be greater than the selected radio frequency RF.

Optionally, the network device 1 further includes:

the interface module 12, the interface module 12 includes a mode switch, and the mode switch is electrically connected to the frequency conversion module 14 and is configured to switch the operating mode of the frequency conversion module 14.

The electrical connection between the mode switch and the frequency conversion module 14 may specifically refer to: the mode switch is electrically connected to the first rf switch 141 and the third rf switch 149. When the mode switch is electrically connected to the first rf switch 141 and the third rf switch 149, respectively, the mode switch may function as: the operating mode of the frequency conversion module 14 is switched by switching the operating states of the first rf switch 141 and the third rf switch 149.

The mode switching switch can adopt switches in the forms of buttons, knobs, knife switches or poking sheets and the like, and is more convenient for a user to operate.

By arranging the mode change-over switch on the interface module, a user can independently select the working mode of the frequency conversion module through the operation mode change-over switch, so that the wireless communication frequency of the network equipment can be independently selected, and the network equipment can be better in practicability.

Optionally, the network device 1 further includes:

an interface module 12, wherein the interface module 12 includes a peripheral interface, and the peripheral interface is electrically connected with the processor 11; and/or the presence of a gas in the gas,

the interface module 12 further includes a debug maintenance interface electrically connected to the processor 11.

The peripheral interface can be used for being electrically connected with an external storage medium or other external equipment; specifically, the peripheral interface may be a Universal Serial Bus (USB) interface, a Secure Digital Input and Output (SDIO) interface, a high-speed Serial computer expansion Bus (PCIE) interface, or a Serial Advanced Technology Attachment (SATA) interface. The processor 11 may be further configured to: and identifying and driving an external storage medium or other external equipment electrically connected with the peripheral interface.

The debug maintenance interface described above may be used to debug and maintain the processor 11. Specifically, the debugging maintenance interface may be an RS232 interface or a USB interface.

The processor can back up or transfer the received data to the external storage device by arranging the peripheral interface in the interface module, thereby further improving the practicability of the network device.

The debugging maintenance interface is arranged on the interface module, so that the maintenance and debugging of the processor are more convenient.

In practical applications, the interface module 12 is not limited to the above-mentioned embodiments, and for example, the interface module 12 may further include a power interface, an ethernet interface, a power switch, an indicator light, and the like; here, the ethernet interface may be used for the processor 11 to synchronize the received data to the internet, and specifically, the ethernet interface may be an RJ45 network port.

In addition, the interface module 12, the processor 11, the Wi-Fi module 13, and the frequency conversion module 14 may be mounted on a Printed Circuit Board (PCB), which may improve integrity. The interface module 12, the processor 11, the Wi-Fi module 13, and the frequency conversion module 14 may be isolated from each other by shielding cases to reduce mutual interference and improve system performance.

In the embodiment of the invention, the frequency conversion module is arranged, so that the network equipment can carry out wireless communication in the working frequency band of the Wi-Fi module and can also carry out wireless communication in other frequency bands except the working frequency band of the Wi-Fi module, specifically, when the frequency conversion module is in a direct-connection working mode, the network equipment carries out wireless communication in the working frequency band of the Wi-Fi module, the network equipment is consistent with the working mode and the working channel of the existing network equipment, when the frequency conversion module is in the frequency conversion working mode, the network equipment carries out wireless communication in the frequency bands except the working frequency band of the Wi-Fi module, at the moment, the Wi-Fi module of the network equipment still works in the working frequency band of the Wi-Fi module, but the antenna port works in the frequency bands except the working frequency band of the Wi-Fi module, thereby improving the flexibility of the network equipment in carrying out wireless communication, the network equipment can meet different application scenes, and the probability of intrusion through a wireless channel is effectively reduced.

As shown in fig. 4, an embodiment of the present invention further provides a wireless communication system, including an AP terminal 2 and at least one STA terminal 3, where the AP terminal 2 includes the network device according to the foregoing embodiment, each STA terminal 3 includes the network device according to the foregoing embodiment, and each STA terminal 3 is wirelessly connected to the AP terminal 2.

The AP terminal 2 may be a router or other devices with wireless access point functions. The STA terminal 3 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), a monitoring Device, or the like.

In the embodiment of the present invention, since the AP terminal includes the network device described in the above embodiment, each STA terminal includes the network device described in the above embodiment, and each STA terminal is wirelessly connected to the AP terminal, so that the wireless communication system can switch to use different communication frequency bands, and further, the flexibility of the wireless communication system during wireless communication can be improved, the wireless communication system can satisfy more application scenarios, and the difficulty of cracking a wireless channel can be improved, the probability of intrusion through the wireless channel can be reduced, the security during data transmission can be improved, and the data transmission rate and the data transmission quality during wireless communication of the wireless communication system can be better ensured.

Optionally, each STA terminal 3 further includes a monitoring module, and the monitoring module of each STA terminal 3 is electrically connected to the processor of the STA terminal 3.

The monitoring module of each STA terminal can be used for acquiring monitoring data and transmitting the monitoring data to the processor of the STA terminal; in particular, the monitoring module may be composed of a high-definition camera and an image processing circuit. The processor of each STA terminal may be configured to control the operation of the monitoring module of the STA terminal, and receive and process the monitoring data.

Because each STA terminal also comprises a monitoring module, and the monitoring module of each STA terminal is electrically connected with the processor of the STA terminal, the embodiment of the invention has a remote monitoring function.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A network device, comprising: the wireless fidelity system comprises a processor, a wireless fidelity Wi-Fi module, a frequency conversion module and an antenna, wherein the processor is electrically connected with the Wi-Fi module, the Wi-Fi module is connected with the antenna through the frequency conversion module, and the processor is electrically connected with the frequency conversion module;

2. The network device of claim 1, wherein the operating frequency band of the Wi-Fi module is an Industrial Scientific Medical (ISM) frequency band.

3. The network device according to claim 1, wherein the number of the antennas is N, the frequency conversion module has N first interfaces and N second interfaces, the N first interfaces are electrically connected to the Wi-Fi module, and the N second interfaces are electrically connected to the N antennas in a one-to-one correspondence;

and N is a positive integer.

4. The network device according to claim 3, wherein the frequency conversion module comprises a local oscillator phase-locked loop and N working units, the local oscillator phase-locked loop is electrically connected with the N working units respectively, the N working units are electrically connected with the N first interfaces in a one-to-one correspondence manner, and the N working units are electrically connected with the N second interfaces in a one-to-one correspondence manner.

5. The network device of claim 4, wherein each of the operating units comprises a first RF switch, a digitally controlled attenuator, an IF filter, a mixer, an RF filter, a second RF switch, an RF front end, a low pass filter, a third RF switch, and a local oscillator amplifier;

6. The network device of claim 1, wherein the network device further comprises:

7. The network device of claim 1, wherein the network device further comprises:

8. The network device of claim 1, wherein the network device is a wireless Access Point (AP) terminal or a wireless Station (STA) terminal.

9. A wireless communication system comprising an AP terminal and at least one STA terminal, the AP terminal comprising the network device of any one of claims 1 to 8, each STA terminal being wirelessly connected to the AP terminal.

10. The wireless communication system of claim 9, wherein each STA terminal further comprises a monitoring module, and wherein the monitoring module of each STA terminal is electrically connected to the processor of the STA terminal.