CN113949395A

CN113949395A - Interference processing method and device

Info

Publication number: CN113949395A
Application number: CN202010692779.3A
Authority: CN
Inventors: 杨蕾; 颜子良; 韩方茂
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2022-01-18

Abstract

An interference processing method and device relate to the technical field of communication, and can effectively inhibit preset blocking interference without damaging the sensitivity of a receiver. The method is applied to an access point. The method comprises the following steps: detecting that preset blocking interference exists in a receiving channel; switching the working mode from a first working mode to a second working mode; and in the second working mode, the receiving channel is communicated with a second device, the second device is used for inhibiting preset blocking interference, and the second device comprises a low-frequency band-pass filter or a high-frequency band-pass filter. The method is applied to the process of detecting and eliminating the preset blocking interference.

Description

Interference processing method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to an interference processing method and apparatus.

Background

Wi-Fi (wireless fidelity) is the mainstream of short-range wireless communication at present, but with the development of indoor communication base stations of the third generation partnership project (3 GPP) fifth generation (5th generation, 5G) mobile communication technology, the operating frequency between Wi-Fi Access Points (APs) and 5G base stations is getting closer. N77(3300MHz-4200MHz) and n79(4400MHz-5000MHz) of a New Radio (NR) new frequency band of 3GPP become an important source of blocking interference of a Wi-Fi5GHz working frequency band (5.15GHz-5.85GHz) in the future.

Currently, a 5GHz full-band bandpass filter (which may be referred to as a normal full-band bandpass filter) is commonly used in an AP to suppress out-of-band interference (i.e., interference outside a 5.15GHz-5.85GHz band). However, for the new NR frequency band close to Wi-Fi5GHz, the suppression capability of the full-band bandpass filter is usually low, for example, the NR frequency band of 4.8-4.9GHz is still almost in the pass band of the full-band bandpass filter, so that the AP has poor suppression capability for the NR frequency band interference.

In order to improve the suppression capability of the NR band interference, a solution is proposed in the prior art, in which the full-band bandpass filter is replaced with a 5GHz full-band bandpass filter (which may be referred to as an NR full-band bandpass filter) having a stronger suppression capability for the NR band interference. According to the characteristics of the NR full-band-pass filter, the suppression capability of the NR full-band-pass filter on 4.8-4.9GHz band interference can generally reach 20-30 dB. Thus, based on the characteristics of the NR full-band bandpass filter, the suppression capability of the AP on the NR frequency band interference can be improved. However, the insertion loss of the NR full band bandpass filter increases in the Wi-Fi operating low frequency band, which reduces the corresponding signal sensitivity and brings about a certain cost increase. That is to say, in the technical scheme that the AP employs the NR full band bandpass filter, when there is interference in the 4.8 to 4.9GHz band, since the AP is provided with the NR full band bandpass filter, the AP enhances the suppression capability of the interference in the 4.8 to 4.9GHz band, but when there is no interference in the 4.8 to 4.9GHz band, since the insertion loss of the NR full band bandpass filter in the AP is higher than that of the ordinary full band bandpass filter, the sensitivity of the receiver in the AP may be reduced.

Disclosure of Invention

The application provides an interference processing method, device and system, which can effectively inhibit preset blocking interference without damaging the sensitivity of a receiver.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, the present application provides an interference handling method, which may be performed by a network device or a component (such as a chip) in the network device or other component having a network device function. The method comprises the following steps: detecting that preset blocking interference exists in a receiving channel; and switching the working mode from the first working mode to the second working mode.

And in the second working mode, the receiving channel is communicated with a second device, the second device is used for inhibiting preset blocking interference, and the second device comprises a low-frequency band-pass filter or a high-frequency band-pass filter.

The first operation mode refers to a single 5G operation mode, i.e., the AP can operate on one channel in the 5GHz full band. In this mode of operation, the AP suppresses signal interference beyond 5.15-5.85GHz by the first device.

The second mode of operation, referred to as the dual 5G mode of operation. In the dual 5G mode, the 5GHz full band is divided into a 5GHz low band and a 5GHz high band, and the AP may operate on one channel of the 5GHz high band and one channel of the 5GHz low band. The AP performs interference suppression outside the 5GHz low-frequency band through a 5GHz low-frequency band-pass filter (abbreviated as a low-frequency band-pass filter), for example, suppresses interference signals outside the 5.15-5.35GHz band, and performs interference suppression outside the 5GHz high-frequency band through a 5GHz high-frequency band-pass filter (abbreviated as a high-frequency band-pass filter), for example, performs attenuation suppression on interference signals outside the 5.55-5.85GHz band.

In general, in the dual 5G mode, the passband range of the low-frequency bandpass filter or the high-frequency bandpass filter is narrow, and both of them have stronger suppression capability for the 5GHz NR frequency band, especially for the NR frequency band 4.8-4.9 GHz.

By adopting the interference processing method, according to the characteristics of hardware, namely a low-frequency band-pass filter or a high-frequency band-pass filter, which is currently arranged on the network equipment, when the preset blocking interference exists, the preset blocking interference is effectively inhibited through the low-frequency band-pass filter or the high-frequency band-pass filter. According to the technical scheme, the first device does not need to be replaced by other hardware (such as an NR full-band-pass filter), and the problems that insertion loss is high and sensitivity of a receiver is reduced due to the fact that the NR full-band-pass filter is arranged in network equipment can be solved. Moreover, the implementation is simpler, and extra cost brought by replacing hardware is not required to be added.

As a possible design, a Packet Error Rate (PER), an Automatic Gain Control (AGC) gain, and channel scan information are obtained; the channel scan information includes received signal information for one or more channels; the one or more channels include a channel for wireless fidelity Wi-Fi operation; the channel scanning information is used for excluding the situation that interference signals and/or useful signals in the frequency bands which can be supported by the Wi-Fi cause the receiver to be saturated;

and determining that the preset blocking interference exists in the receiving channel according to the packet error rate, the AGC gain and the channel scanning information.

Currently, the scanning range of the AP channel scanning only includes channels where the AP can operate, does not include a 3GPP5GHz new frequency band, and currently, cannot identify strong interference existing in the 3GPP5GHz new frequency band. In the application, the AP receiver saturation can be preliminarily determined through the combination of the channel scanning result, the packet error rate and the AGC gain, the condition that the receiver is saturated due to interference signals and/or useful signals in the working frequency band which can be supported by Wi-Fi can be eliminated, and therefore the receiver is determined to be saturated, the reason for poor service quality is that strong interference signals outside the working frequency band which can be supported by the AP can be determined, wherein the strong interference signals are strong interference signals in the 4.8-4.9GHz frequency band possibly.

As a possible design, determining that the preset blocking interference exists in the receiving channel according to the packet error rate, the AGC gain and the channel scanning information includes:

and determining that the preset blocking interference exists in the receiving channel when the packet error rate is greater than or equal to a first threshold, the AGC gain is less than or equal to a second threshold, and the receiving signals of one or more channels are less than or equal to a third threshold.

In a second aspect, the present application provides a network apparatus, which may be the above network device or a component (such as a chip) in the network device or other component supporting the functions of the network device. The device includes:

a storage unit to store instructions;

a processing unit for executing instructions to cause the interference processing apparatus to perform the following operations:

detecting that preset blocking interference exists in a receiving channel; switching the working mode from a first working mode to a second working mode; and in the second working mode, the receiving channel is communicated with a second device, the second device is used for inhibiting preset blocking interference, and the second device comprises a low-frequency band-pass filter or a high-frequency band-pass filter.

In one possible design, detecting the presence of the predetermined jamming interference in the receive channel includes:

acquiring packet error rate PER, automatic gain control AGC gain and channel scanning information; the channel scan information includes received signal information for one or more channels; the one or more channels include a channel for wireless fidelity Wi-Fi operation; the channel scanning information is used for excluding the situation that interference signals and/or useful signals in the frequency bands which can be supported by the Wi-Fi cause the receiver to be saturated; and determining that the preset blocking interference exists in the receiving channel according to the packet error rate, the AGC gain and the channel scanning information.

In one possible design, determining that the predetermined blocking interference exists in the receiving channel is detected according to the packet error rate, the AGC gain and the channel scanning information includes:

In a possible design of any of the above aspects, in the first operation mode, the receiving channel communicates with the first device; the first device is different from the second device.

In one possible design of any of the above aspects, the first device comprises a normal full-band bandpass filter.

In one possible design of any of the above aspects, the predetermined blocking interference includes a Wi-Fi supportable frequency band in a range of 5.15GHz-5.85 GHz.

In one possible design of any of the above aspects, the blocking interference outside of the Wi-Fi supportable frequency band comprises blocking interference at 4.8GHz-4.9 GHz.

In a third aspect, the present application provides an interference processing apparatus having a function of implementing the interference processing method according to any one of the first aspect. The functions may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In a fourth aspect, the present application provides an interference processing apparatus, including: a processor and a memory; the memory is configured to store computer executable instructions, and when the interference processing apparatus is running, the processor executes the computer executable instructions stored in the memory, so as to enable the interference processing apparatus to execute the interference processing method designed as any one of the above first aspects.

In a fifth aspect, the present application provides an interference processing apparatus, including: a processor; the processor is configured to be coupled to the memory, and after reading the instructions in the memory, execute the interference processing method as designed in any one of the above first aspects according to the instructions.

In a sixth aspect, the present application provides a computer-readable storage medium, having stored therein instructions, which, when executed on a computer, enable the computer to perform the interference processing method as designed in any one of the first aspects.

In a seventh aspect, the present application provides a computer program product containing instructions that, when run on a computer, enable the computer to perform the interference processing method as designed in any of the first aspects above.

In an eighth aspect, the present application provides a chip comprising a processor. The processor is coupled to a memory, the memory storing program instructions, which when executed by the processor implement the interference handling method as arbitrarily designed in the first aspect above.

The technical effects brought by any one of the design manners in the second aspect to the eighth aspect can be referred to the technical effects brought by different design manners in the first aspect, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a system architecture provided in an embodiment of the present application;

fig. 2-3 are schematic structural diagrams of network devices according to embodiments of the present application;

FIG. 4 is a schematic diagram of a frequency response of a filter provided in an embodiment of the present application;

fig. 5-7 are schematic flow charts of interference processing methods provided in the embodiments of the present application;

fig. 8 is a schematic structural diagram of an interference processing apparatus according to an embodiment of the present application.

Detailed Description

The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects.

"at least one" means one or more, "a plurality" means two or more.

"and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural.

Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The embodiment of the application provides an interference processing method which can be applied to a system with coexistence of Wi-Fi and NR. Fig. 1 shows a system architecture to which the technical solution of the present application is applied. The system comprises at least two network devices (for example network device 1 and network device 2 are shown in fig. 1). Optionally, the system may further include a terminal device (for example, terminal device 1 and terminal device 2 are shown in fig. 1).

In this embodiment, the network device is a device located on the network side of the system and having a wireless transceiving function, or a chip system that can be installed on the device having the wireless transceiving function. Specifically, the network device 1 is an AP in a Wi-Fi system, such as a home gateway, a router, a server, a switch, a bridge, and the like. The network device 2 is a 3GPP device. Such as evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), Base Band Unit (BBU), wireless relay Node, wireless backhaul Node, transmission point (TRP or transmission point, TP), etc., and may also be 5G, such as a base station in a New Radio (NR) system, or a transmission point (TRP or BBU), one or a group (including multiple antenna panels) of base stations in a 5G system, or may also be a network Node forming a 5G or transmission point, such as a base band unit (TP), or a distributed Radio Network Controller (RNC), DU), a roadside unit (RSU) having a base station function, and the like.

The terminal device is a terminal with wireless transceiving function located in the system, or a chip system that can be installed in the terminal with wireless transceiving function. The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, and the like.

In the system shown in fig. 1, a network device 2, such as a 3GPP5G base station, may include an NR module. The NR frequency band module is configured to transmit NR frequency band signals. The network device 1, i.e. the Wi-Fi AP, comprises a Wi-Fi module which can receive Wi-Fi signals from other APs, Wi-Fi signals from the terminal device. The Wi-Fi module can also be used for receiving an NR frequency band signal from a 5G base station. And the NR frequency band signal received by the Wi-Fi module is an interference signal.

It can be understood that when the 5G base station is very close to the Wi-Fi AP, or the transmission power of the NR frequency band module is large, the NR frequency band signal sent by the 5G base station may generate strong blocking interference to the Wi-Fi AP. This strong jamming interference is likely to exceed the interference rejection capabilities of Wi-Fi APs. The technical scheme of the embodiment of the application is used for detecting and processing the strong blocking interference. The specific technical scheme can be seen in the following examples.

The system architecture and the service scenario described in this application are for more clearly illustrating the technical solution of this application, and do not constitute the only limitation to the technical solution provided in this application, and it can be known by those skilled in the art that the technical solution provided in this application is also applicable to similar technical problems along with the evolution of the system architecture and the appearance of new service scenarios.

Optionally, the terminal device and the network device in the embodiment of the present application may be implemented by different devices. For example, the terminal device and the network device in the embodiment of the present application may be implemented by a network device having the structure described in fig. 2. Fig. 2 is a schematic diagram illustrating a hardware structure of a network device according to an embodiment of the present application. The device 400 comprises at least one processor 401, a memory 403 and at least one transceiver 404. Wherein the memory 403 may also be comprised in the processor 401.

In some embodiments, the network device also has an antenna (not shown in fig. 2) for transmitting and receiving electromagnetic wave signals. Each antenna in device 400 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antennas may be multiplexed as diversity antennas for a wireless local area network. One or more antennas may be disposed in the device 400, and the layout positions of the antennas may also be flexibly set, which is not limited in this embodiment of the application.

The processor 401 may be implemented as one or more processing units, such as a Central Processing Unit (CPU), an application-specific integrated circuit (ASIC), or as one or more integrated circuits configured to control the execution of programs in accordance with the present disclosure.

Pathways may exist between the various components to facilitate the transfer of information between the components.

A transceiver 404 for communicating with other devices. In the embodiments of the present application, the transceiver may be a module, a circuit, an interface or other apparatuses capable of implementing a communication function, and is used for communicating with other devices. Alternatively, the transceiver may be a separately provided transmitter that can be used to transmit information to other devices, or a separately provided receiver that can be used to receive information from other devices. The transceiver may also be a component that integrates information sending and receiving functions, and the embodiment of the present application does not limit the specific implementation of the transceiver.

The transceiver 404 may include one or more radio frequency channels, each of which includes one or more radio frequency devices for processing radio frequency (radio frequency) signals received from an antenna and converting to a lower intermediate frequency. Taking the transceiver integrating the information transmitting and receiving functions, i.e. the transceiver includes a receiver and a transmitter, as shown in fig. 3 (a) or fig. 3 (b), as a possible implementation, the radio frequency components of the receiving channel in the receiver include an automatic gain control amplifier (agc), a Low Noise Amplifier (LNA), a filter, a switch, and a duplexer. The automatic gain control amplifier adjusts the output signal by using the effective combination of linear amplification and compression amplification. When weak signals are input, the linear amplification circuit works to ensure the strength of output signals. When the input signal reaches a certain intensity, the compression amplifying circuit is started to reduce the output amplitude. That is, the AGC can automatically control the magnitude of the gain by changing the input-output compression ratio. The change-over switch is used for realizing the switch of the receiving and the transmitting of the radio frequency signal or the switch among different frequency bands. The duplexer is used for isolating the transmitting signal from the receiving signal and ensuring that the receiving signal and the transmitting signal can work normally at the same time.

The filter in the rf component may be different, and specifically, the filter may be a low-frequency band-pass filter, a high-frequency band-pass filter, or a common full-band-pass filter, according to the current mode of the apparatus 400.

For a received signal, the signal is received by an antenna, and then passes through a duplexer, a switch, a filter, an LNA, and an AGC amplifier in a radio frequency part, and then reaches a modem processor (a modem processor is a type of processor in the device 400) of the device 400 to be demodulated. The device 400 may operate in a single 5G mode, or a dual 5G mode.

Wherein when the device 400 is operating in the dual 5G mode, see fig. 3 (a), the switch is under the control of the processor to communicate either the low frequency band pass filter or the high frequency band pass filter. For the received signal, the signal is received by an antenna, passes through a duplexer, a switch, a low-frequency band-pass filter or a high-frequency band-pass filter in a radio frequency component, an LNA and an AGC amplifier, and then reaches a modem processor for demodulation.

It should be noted that, for the antenna configured to operate in the 5GHz high frequency band, after receiving the signal, it may be connected to the high frequency band pass filter through the duplexer and the switch. For an antenna configured to operate in the 5GHz low band, after receiving a signal, the antenna may be connected to a low-frequency band-pass filter through a duplexer and a switch.

When the apparatus 400 operates in the non-dual 5G mode, i.e., the single 5G mode, referring to fig. 3 (b), the switch is controlled by the processor to communicate with the normal full band bandpass filter. For a received signal, the signal is received by an antenna, passes through a duplexer, a switch, a common full-band-pass filter, an LNA and an AGC module in a radio frequency component, and then reaches a modulation and demodulation processor for demodulation.

For a specific description of the single 5G mode and the double 5G mode, reference may be made to the following examples.

The memory 403 may be a read-only memory (ROM) or other type of memory module capable of storing static information and instructions, a Random Access Memory (RAM) or other type of memory module capable of dynamically storing information and instructions, or an electrically erasable programmable read-only memory (EEPROM), an optical disc, a magnetic disc, or other magnetic storage devices. The memory may be separate and coupled to the processor via a communication link. The memory may also be integral to the processor.

The memory 403 is used for storing computer-executable instructions, which can be called by one or more processing units in the processor 401 to perform the corresponding steps in the methods provided by the embodiments described below.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, instructions, computer programs, or by other names, which are not specifically limited in the embodiments of the present application.

In particular implementations, device 400 may include multiple processors, such as processor 401 and processor 407 in FIG. 2, for example, as an embodiment. Each of these processors may be a single core processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In some embodiments, the processor of device 400 includes various types of processors. Such as a baseband processor, the aforementioned modem processor (not shown in fig. 2), which may include a modulator and a demodulator.

The wireless communication functions of the device 400 may be implemented by an antenna, a transceiver 404, a modem processor, a baseband processor, etc.

In particular implementations, device 400 may also include an output device 405 and an input device 406, as one embodiment. An output device 405 is in communication with the processor 401 and may display information in a variety of ways. For example, the output device 405 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device 406 is in communication with the processor 401 and may receive user input in a variety of ways. For example, the input device 406 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

An exemplary block diagram of a network device is shown in fig. 2. It should be understood that the illustrated network device is merely an example, and in actual practice a network device may have more or fewer components than shown in fig. 2, may combine two or more components, or may have a different configuration of components.

The device 400 may be a general-purpose device or a special-purpose device, and the embodiment of the present application does not limit the type of the device 400. The terminal device or the network device may be a device having a similar structure to that of fig. 2.

In the system shown in fig. 1, when the 5G base station (network device 2) and the Wi-Fi AP (network device 1) are close to each other, or the transmission power of the 5G base station is high, the transmission signal of the 5G base station generates strong interference to the Wi-Fi AP. This strong interference would likely exceed the AP's anti-jamming capability, causing the non-linear devices of the AP's receive chain to saturate, creating non-linear distortion. This strong interference causing saturation of the receive chain is called jamming interference.

At present, in order to improve the inhibition capability of the AP to the NR frequency band blocking interference, a common full-band pass filter is replaced with an NR full-band pass filter. The amplitude-frequency response of these two full-band bandpass filters can be seen in fig. 4.

The amplitude-frequency response curve shown in fig. 4 refers to the variation of the amplitude (dB expression) of the S21 parameter with frequency.

In the amplitude-frequency response, the suppression capability is usually applied to the frequency outside the pass band of the filter, and specifically, refers to the absolute value of the amplitude of the S21 parameter of the filter when the frequency outside the pass band is input into the filter.

The insertion loss generally refers to the frequency in the pass band of the filter, and specifically refers to the absolute value of the amplitude of the S21 parameter of the filter when the frequency in the pass band is input into the filter.

The suppression capability and the insertion loss of the filter can represent the attenuation of the received signals with different frequencies after passing through the filter.

As can be seen from fig. 4, for the frequency band close to the Wi-Fi low frequency band, i.e. close to 5.15GHz, the absolute value of the amplitude of the S21 parameter of the NR full-band bandpass filter is higher than the absolute value of the amplitude of the S21 parameter of the normal full-band bandpass filter, which means that the suppression capability of the NR full-band bandpass filter for the frequency band close to 5.15GHz is higher than that of the normal full-band bandpass filter. However, as can also be seen from fig. 4, for the frequencies in the passband, such as 5.15GHz-5.55GHz, the absolute value of the amplitude of the S21 parameter of the NR full-band bandpass filter is still higher than the absolute value of the amplitude of the S21 parameter of the normal full-band bandpass filter, which indicates that the insertion loss of the NR full-band bandpass filter is higher than that of the normal full-band bandpass filter in the range of 5.15GHz-5.55 GHz.

Therefore, the work frequency band of the NR full-band-pass filter covers the whole Wi-Fi5GHz frequency band, but the insertion loss of the NR full-band-pass filter at the Wi-Fi work low frequency band is increased by 1-2dB compared with that of a common full-band-pass filter. That is, in the prior art, replacing a normal full-band bandpass filter with an NR full-band bandpass filter would increase the insertion loss in the working Wi-Fi working low frequency band (e.g., 5.15GHz-5.55GHz), reduce the corresponding signal sensitivity, and increase the cost.

In order to solve the above technical problem, an embodiment of the present application provides an interference processing method, referring to fig. 5, the method includes the following steps:

s501, the network equipment detects that preset blocking interference exists in a receiving channel.

In this embodiment, the network device may be the network device 1 shown in fig. 1, that is, an AP. The modes in which the AP can operate include at least a dual 5G mode and a single 5G mode. Also, the AP has a channel scanning function.

And presetting blocking interference, including blocking interference outside the frequency band which can be supported by Wi-Fi. The Wi-Fi can support frequency bands ranging from 5.15GHz to 5.85 GHz. The blocking interference outside the frequency band supportable by Wi-Fi comprises blocking interference of 4.8GHz-4.9 GHz.

The single 5G mode refers to that the AP can operate on one channel in the 5GHz full band. In the working mode, the AP restrains the signal interference beyond 5.15-5.85GHz through a common full-band-pass filter. The amplitude-frequency response of a typical full-band bandpass filter can be seen in fig. 4.

As can be seen from fig. 4, the general full-band bandpass filter has low insertion loss in the passband and high sensitivity, but has weak ability to suppress 4.8-4.9GHz in the 3GPP5GHz NR frequency band.

In the dual 5G mode, the 5GHz full band is divided into a 5GHz low band and a 5GHz high band, and the AP may operate on one channel of the 5GHz high band and one channel of the 5GHz low band. The AP performs interference suppression outside the 5GHz low-frequency band through a 5GHz low-frequency band-pass filter (abbreviated as a low-frequency band-pass filter), for example, suppresses interference signals outside the 5.15-5.35GHz band, and performs interference suppression outside the 5GHz high-frequency band through a 5GHz high-frequency band-pass filter (abbreviated as a high-frequency band-pass filter), for example, performs attenuation suppression on interference signals outside the 5.55-5.85GHz band. The amplitude-frequency response of the low frequency band pass filter and the high frequency band pass filter can be seen in fig. 4.

It should be noted that, the dual 5G mode, the single 5G mode, the low-frequency band pass filter, the high-frequency band pass filter, the common full-band pass filter, and may also have other names, which is not limited in this application.

As can be seen from fig. 4, the passband range of the low-frequency bandpass filter or the high-frequency bandpass filter is generally narrow, and both of them have relatively strong suppression capability for the NR frequency band of 5GHz, especially 4.8 to 4.9 GHz. For example, as shown in fig. 4, the low frequency band pass filter or the high frequency band pass filter can suppress 4.8-4.9GHz by more than 30 dB.

From the above analysis, since the hardware has a low-frequency band-pass filter or a high-frequency band-pass filter, the AP has a strong ability to suppress interference in the new 3GPP5GHz NR frequency band in the dual 5G mode.

Fig. 4 is a diagram illustrating the amplitude-frequency response of a general full-band pass filter, a low-frequency band pass filter, and a high-frequency band pass filter in the AP. In practical implementation, the amplitude-frequency response parameters of each filter may be different from the parameters. The embodiment of the present application does not limit the specific numerical value of the amplitude-frequency response parameter of each filter.

It should be noted that before S501, the AP may further perform the following steps: and judging whether the current working mode is a double 5G mode.

If the current operating mode is the dual 5G mode, the low-frequency band-pass filter or the high-frequency band-pass filter is connected in the operating mode, and the low-frequency band-pass filter or the high-frequency band-pass filter has a strong ability of suppressing, for example, 4.8 to 4.9GHz, and usually, blocking interference of 4.8 to 4.9GHz is already suppressed. Then, the AP may continue to execute the service without executing the interference processing method of the embodiment of the present application, that is, without executing S501 and S502. This can avoid the impairment of the AP operation capability by the unnecessary interference detection operation and the interference cancellation operation.

On the contrary, if the current working mode is not the dual 5G mode, and because the inhibition capability of the common full-band-pass filter to the blocking interference of the 4.8-4.9GHz band is poor in the non-dual 5G mode, the AP needs to execute the interference processing method of the embodiment of the present application to reduce the influence of the blocking interference of the 4.8-4.9GHz band on the service quality.

Judging whether the current working mode is the single 5G mode or the double 5G mode, specifically, the following steps can be implemented: as shown in fig. 3 (a), if the low-frequency band-pass filter or the high-frequency band-pass filter is connected to the switch, the AP determines to operate in the dual 5G mode. As shown in fig. 3 (b), if the switch is connected to the normal full-band bandpass filter, the AP determines that it is currently operating in another service mode, i.e., the single 5G mode. As a possible implementation manner, the processor may control to apply a certain control signal to the switch, and the switch is connected to different filters under different control signals. Based on the principle, the processor of the AP can obtain the current control signal of the switch, and learn the type of the band-pass filter currently connected to the receiving channel according to the current control signal of the switch, so as to determine the current operating mode.

As one possible implementation, referring to fig. 6, S501 may be implemented as the following steps S501a and S501 b:

s501a, the network equipment acquires packet error rate, AGC gain and channel scanning information.

Wherein the channel scanning information comprises received signal information of one or more channels; the one or more channels include channels corresponding to Wi-Fi supportable frequency bands. Here, the one or more channels include a plurality of channels corresponding to 5.15GHz-5.85 GHz. The channel scanning information is used for excluding the situation that the interference signals and/or the useful signals in the frequency band which can be supported by the Wi-Fi cause the preset blocking interference, namely, the situation that the interference signals and/or the useful signals in the 5.15GHz-5.85GHz cause the preset blocking interference.

Optionally, the AP obtains the channel scanning information by looking at a channel scanning result (for example, a result of last channel scanning), which is the latest time, or the AP performs one channel scanning and obtains the channel scanning information corresponding to the one channel scanning.

S501b, the network device determines that the preset blocking interference exists in the receiving channel according to the packet error rate, the AGC gain and the channel scanning information.

Specifically, the packet error rate is greater than or equal to a first threshold, the AGC gain is less than or equal to a second threshold, and the received signal of the one or more channels (i.e., the channel corresponding to the Wi-Fi supportable frequency band) is less than or equal to a third threshold, and it is determined that the preset blocking interference exists in the received channel.

It will be appreciated that non-linear devices, such as amplifiers, in the AP receiver are prone to non-linear saturation when jamming interference occurs, and in particular, AGC amplifiers are more prone to saturation, resulting in lower AGC gain. Therefore, the AGC gain can be used as a determination factor for determining whether jamming interference is generated. When the AGC gain is less than or equal to the second threshold, it indicates that jamming interference may be present. Moreover, when the blocking interference occurs, the amplification gain of the amplifier is low, so that the amplification effect on the useful signal is limited, the signal-to-noise ratio is reduced, and the useful signal even cannot be correctly demodulated, so that the packet error rate is increased. Therefore, the packet error rate can also be used as a determination factor for determining the service quality. And when the packet error rate is greater than or equal to the first threshold, the service quality is poor. Then, in the embodiment of the present application, when the AGC gain is less than or equal to the second threshold and the two conditions that the packet error rate is greater than or equal to the first threshold are simultaneously satisfied, the AP may determine that the receiver is saturated and the service quality is poor. This may be because the AP receives too strong a useful signal or may receive too strong an interfering signal. The interference signal may be an interference signal in a frequency band supportable by Wi-Fi, or an interference signal in a frequency band outside the frequency band supportable by Wi-Fi. The AP may determine the specific cause of receiver saturation in conjunction with the channel scan information. Specifically, when the received signal of one or more channels supported by Wi-Fi (channels corresponding to 5.15GHz-5.85GHz) is less than or equal to the third threshold, it indicates that the interference signal and the useful signal in the Wi-Fi channel (i.e., channels corresponding to 5.15GHz-5.85GHz) that can be supported by the AP are weak, and the saturation of the AP receiver is generally not caused, and the service quality is generally not affected. Thus, it is possible to exclude the situation that interfering signals within the Wi-Fi supportable operating band and/or useful signals cause the receiver to saturate, whereby it can be determined that the blocking interference is caused by strong interfering signals outside the AP supportable operating band, which are likely to be strong interfering signals in the 4.8-4.9GHz band.

Currently, the scanning range of the AP channel scanning only includes channels where the AP can operate, does not include a 3GPP5GHz new frequency band, and currently, cannot identify strong interference existing in the 3GPP5GHz new frequency band. In the embodiment of the application, the saturation of the AP receiver and the poor service quality can be preliminarily determined by combining the channel scanning result with the packet error rate and the AGC gain, and the situation that the receiver is saturated due to an interference signal and/or a useful signal in a working frequency band supportable by Wi-Fi can be eliminated, so that the receiver is saturated due to the fact that the strong interference signal outside the working frequency band supportable by the AP is a strong interference signal, wherein the strong interference signal is likely to be a strong interference signal in a 4.8-4.9GHz frequency band.

Specifically, referring to fig. 3 (b), the AP is currently operating in a non-dual 5G mode, which receives a signal via an antenna, the signal passing through a duplexer, a switch, a normal full band bandpass filter, an LNA, and an AGC amplifier. The processor of the AP can calculate the AGC gain corresponding to the signal and store the AGC gain in a register. The amplified signal may then be further processed through a series of signal processing processes, such as demodulation by a demodulator. Correspondingly, the AP processor can calculate the packet error rate corresponding to the signal according to the demodulation result, and store the calculated packet error rate in the register. Subsequently, when the AP processor detects that the packet error rate and the AGC gain satisfy the above conditions, it may determine whether there is a preset blocking interference by combining with the current channel scanning information.

The above describes the detection principle of preset blocking interference. Next, the interference suppression principle for the preset blocking interference is described.

S502, the network equipment switches the working mode from the first working mode to the second working mode.

And in the second working mode, the receiving channel is communicated with a second device, and the second device is used for inhibiting preset blocking interference. In the first working mode, the receiving channel is communicated with the first device. The first device is different from the second device. The first device comprises a normal full band bandpass filter and the second device comprises a low frequency bandpass filter or a high frequency bandpass filter.

Specifically, the first operating mode is a service mode other than the dual 5G mode. The second operating mode is a dual 5G mode. S502, the network device switches the operation mode from the non-dual 5G mode to the dual 5G mode.

It can be understood that, because the dual 5G mode has a stronger ability to suppress the blocking interference, when the AP detects the blocking interference such as a severe 3GPP5GHz NR new frequency band, the operating mode is switched to the dual 5G mode. In this way, the effect of such blocking interference can be significantly eliminated.

The above describes the principle of detecting and eliminating the pre-set blocking interference. As a possible implementation, the specific process of detecting and suppressing the preset blocking interference may be referred to as a flowchart shown in fig. 7. The AP may detect its operating mode in real time or periodically. Wherein, the detection period can be flexibly configured. The detection period is not limited in the embodiment of the application. And if the AP detects that the current work is in the double 5G mode, stopping the subsequent detection step. I.e., not continue to detect packet error rate, AGC gain, channel scan information, etc. If the AP detects that it is operating in a mode other than the dual 5G mode, it continues to detect the parameter packet error rate. Specifically, the AP queries the value of the packet error rate in the register, and compares the packet error rate value with the first threshold. If the packet error rate is smaller than the first threshold value, it indicates that the service quality is not affected. In this case, there may be an interference signal to the AP, but since the service quality is not affected, the AP may not detect the specific interference, that is, the AP may not determine the AGC gain any more. Otherwise, if the packet error rate is greater than or equal to the first threshold value as a comparison result, the Wi-Fi service state is not good. In this case, in order to improve Wi-Fi service quality, specific interference needs to be detected and the detected interference needs to be suppressed. The AP continues to determine the AGC gain in order to determine the specific interference. Specifically, the AP looks up the value of the AGC gain in the register and compares the AGC gain value with a second threshold. If the comparison result is that the AGC gain is greater than the second threshold, it indicates that the signal received by the AP (useful signal + noise + interference) is small, and the AGC is not saturated. In this case, the reason that the packet error rate is greater than or equal to the first threshold (indicating that the Wi-Fi traffic state is not good) in the above steps is unlikely to be caused by strong blocking interference (it may be that the reception level of the useful signal is less than the sensitivity). The AP may not perform subsequent steps and not detect and suppress the pre-set blocking interference. On the contrary, if the AGC gain is less than or equal to the second threshold value as a result of the comparison, it is likely that the signal received by the AP (useful signal + noise + interference) is large, which results in saturation of the reception of the AGC amplifier, so that the AGC gain is small. In this case, to further determine whether the signal causing the AGC amplifier to saturate is a desired signal or whether the AP can support an in-band interferer or an out-of-band interferer. The AP needs to perform the following steps, i.e., determine the channel scanning information. Specifically, the AP queries a channel scanning result of a Wi-Fi5GHz channel at the latest time to acquire channel scanning information, or performs channel scanning on one or more channels of the Wi-Fi5GHz channel to acquire channel scanning information. If the received signals of the one or more channels are greater than the third threshold, it indicates that the Wi-Fi service state is not good probably because the signals of a certain frequency band in the Wi-Fi5GHz channel or the one or more channels are too strong. Since it is likely that Wi-Fi traffic is not poor due to the pre-set jamming interference, the AP may not perform the step of no longer detecting and suppressing the pre-set jamming interference. On the contrary, if the received signals of one or more channels of the Wi-Fi5GHz are all less than or equal to the third threshold, it is likely that the reason for the poor Wi-Fi service state is that the interference signals other than the Wi-Fi5GHz band are too strong, where the interference signals other than the Wi-Fi5GHz band are likely to be blocking interference on the 4.8-4.9GHz band closer to the Wi-Fi5GHz band, that is, the above-mentioned preset blocking interference. Then, the AP will perform a suppression operation for the preset blocking interference, specifically, the AP processor controls the switch to connect the low-frequency band-pass filter or the high-frequency band-pass filter (i.e., switch to the dual 5G mode), and enhances the suppression capability for the preset blocking interference through the low-frequency band-pass filter or the high-frequency band-pass filter.

The interference processing method provided by the embodiment of the application can detect whether preset blocking interference exists, and after the preset blocking interference exists, the working mode of the network equipment is switched from the first working mode to the second working mode. And in the second working mode, the receiving channel is communicated with a second device, the second device is used for inhibiting preset blocking interference, and the second device comprises a low-frequency band-pass filter or a high-frequency band-pass filter. That is to say, according to the characteristics of the hardware, that is, the low-frequency band-pass filter or the high-frequency band-pass filter, currently set on the network device, when the preset blocking interference exists, the preset blocking interference is effectively suppressed through the low-frequency band-pass filter or the high-frequency band-pass filter. According to the technical scheme, the first device does not need to be replaced by other hardware (such as an NR full-band-pass filter), and the problems that insertion loss is high and sensitivity of a receiver is reduced due to the fact that the NR full-band-pass filter is arranged in network equipment can be solved. Moreover, the implementation is simpler, and extra cost brought by replacing hardware is not required to be added.

It is to be understood that, in order to implement the above functions, the network element in the embodiments of the present application includes a corresponding hardware structure and/or software module for performing each function. The elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein may be embodied in hardware or in a combination of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present teachings.

In the embodiment of the present application, the network element may be divided into the functional units according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 8 shows a schematic block diagram of an interference processing apparatus provided in an embodiment of the present application, where the interference processing apparatus may be the network device (or a component having a function of the network device, or the component may be used in cooperation with the network device to support the network device to implement the corresponding function). The interference processing means 900 may be in the form of software, and may also be a chip available for the device. The interference processing apparatus 900 includes: a processing unit 902 and a communication unit 903. Optionally, the communication unit 903 may be further divided into a transmitting unit (not shown in fig. 8) and a receiving unit (not shown in fig. 8). Wherein, the sending unit is configured to support the interference processing apparatus 900 to send information to other network elements. A receiving unit, configured to support the interference processing apparatus 900 to receive information from other network elements.

Optionally, the interference processing apparatus 900 further includes a storage unit 901.

If the interference processing apparatus 900 is the network device mentioned above, the processing unit 902 may be configured to support the network device to perform S501, S502 in fig. 5, S501a, S501b in fig. 6, and/or other processes for the schemes described herein. The communication unit 903 is configured to support communication between the network device and other network elements (e.g., the network device 2 described above, etc.). Optionally, the sending unit is configured to support the network device to send information to another network element, where the communication unit is divided into the sending unit and the receiving unit. A receiving unit, configured to support a network device to receive information from other network elements.

In one possible approach, the processing unit 902 may be a controller or the

processor

401 or 407 shown in fig. 2. Which may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. The communication unit 903 may be the transceiver 404 shown in fig. 2 or the like. The storage unit 901 may be the memory 403 shown in fig. 2.

Those of ordinary skill in the art will understand that: in the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software or firmware, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, optical fiber, twisted pair) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any medium that can be accessed by a computer or a data storage device including one or more media integrated servers, data centers, and the like. The media may be magnetic media (e.g., floppy disks, hard disks, magnetic tape), optical media (e.g., compact disks), or semiconductor media (e.g., Solid State Disks (SSDs)), among others.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on a plurality of network devices (e.g., terminal devices). Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and all changes and substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An interference processing method applied to an Access Point (AP), the method comprising:

detecting that preset blocking interference exists in a receiving channel;

switching the working mode from a first working mode to a second working mode; and in the second working mode, the receiving channel is communicated with a second device, the second device is used for inhibiting the preset blocking interference, and the second device comprises a low-frequency band-pass filter or a high-frequency band-pass filter.

2. The interference processing method of claim 1, wherein detecting that the predetermined blocking interference exists in the receiving channel comprises:

acquiring packet error rate PER, automatic gain control AGC gain and channel scanning information; the channel scan information includes received signal information for one or more channels; the one or more channels include a channel for wireless fidelity Wi-Fi operation; the channel scanning information is used for excluding the situation that interference signals and/or useful signals in the frequency bands which can be supported by Wi-Fi cause the receiver to be saturated;

and determining to detect that the receiving channel has preset blocking interference according to the packet error rate, the AGC gain and the channel scanning information.

3. The interference processing method of claim 2, wherein determining that there is a predetermined blocking interference in the receiving channel according to the packet error rate, the AGC gain, and the channel scan information comprises:

and determining that the preset blocking interference exists in the receiving channel when the packet error rate is greater than or equal to a first threshold, the AGC gain is less than or equal to a second threshold, and the receiving signals of the one or more channels are less than or equal to a third threshold.

4. The interference processing method according to any one of claims 1 to 3, wherein in the first operating mode, the receiving channel communicates with a first device; the first device is different from the second device.

5. The interference processing method according to claim 4, wherein the first device comprises a normal full band bandpass filter.

6. The interference processing method according to any one of claims 1 to 5, wherein the preset blocking interference comprises blocking interference outside a Wi-Fi supportable frequency band; the range of the frequency band which can be supported by the Wi-Fi is 5.15GHz-5.85 GHz.

7. The interference handling method according to claim 6, wherein the blocking interference outside the Wi-Fi supportable frequency band comprises blocking interference at 4.8GHz-4.9 GHz.

8. An interference processing apparatus, comprising:

a storage unit to store instructions;

a processing unit configured to execute the instructions to cause the interference processing apparatus to perform operations comprising:

detecting that preset blocking interference exists in a receiving channel; switching the working mode from a first working mode to a second working mode; and in the second working mode, the receiving channel is communicated with a second device, the second device is used for inhibiting the preset blocking interference, and the second device comprises a low-frequency band-pass filter or a high-frequency band-pass filter.

9. The interference processing apparatus of claim 8, wherein the detecting that there is preset blocking interference in a receiving channel comprises:

acquiring packet error rate PER, automatic gain control AGC gain and channel scanning information; the channel scan information includes received signal information for one or more channels; the one or more channels include a channel for wireless fidelity Wi-Fi operation; the channel scanning information is used for excluding the situation that interference signals and/or useful signals in the frequency bands which can be supported by Wi-Fi cause the receiver to be saturated; and determining to detect that the receiving channel has preset blocking interference according to the packet error rate, the AGC gain and the channel scanning information.

10. The interference processing apparatus of claim 9, wherein the determining that there is a predetermined blocking interference in the receiving channel according to the packet error rate, the AGC gain, and the channel scan information comprises:

11. The interference processing apparatus according to any one of claims 8 to 10, wherein in the first operating mode, the receiving channel communicates with a first device; the first device is different from the second device.

12. The interference processing apparatus of claim 11 wherein the first device comprises a normal full band bandpass filter.

13. The interference processing apparatus according to any one of claims 8 to 12, wherein the preset blocking interference comprises blocking interference outside a Wi-Fi supportable frequency band; the range of the frequency band which can be supported by the Wi-Fi is 5.15GHz-5.85 GHz.

14. The interference processing apparatus of claim 13, wherein the Wi-Fi supportable out-of-band jamming interference comprises 4.8GHz-4.9GHz jamming interference.

15. A computer-readable storage medium, characterized in that the storage medium has stored thereon a computer program for executing the interference processing method of any one of claims 1-7.

16. A chip comprising a processor and an interface;

the interface is used for realizing the transceiving function of the chip;

the processor is configured to read instructions to perform the interference processing method of any one of claims 1-7.