CN106612162B - Interference detection method and device for wireless local area network - Google Patents

Abstract

The invention discloses an interference detection method and device for a wireless local area network, wherein the method comprises the following steps: when a target high-efficiency signaling field BHE-SIG-B is transmitted in a first Basic Service Set (BSS), determining the energy of a signal carried by a null subcarrier on a non-primary channel of the first BSS, wherein the frequency bands occupied by the first BSS and a second BSS are at least partially overlapped, and a null subcarrier position pattern configured by the first BSS is different from a null subcarrier position pattern configured by the second BSS; and determining the interference suffered by the transmission process of the target HE-SIG-B according to the energy of the signal carried by the empty subcarrier on the non-primary channel of the first BSS. The embodiment of the invention solves the problem that interference detection can not be carried out in the transmission process of the HE-SIG-B.

Description

Interference detection method and device for wireless local area network

technical field

Embodiments of the present invention relate to the field of communications, and in particular, to an interference detection method and device for a wireless local area network.

Background technique

In the prior art, a wireless local area network (Wireless Local Area Networks, WLAN) widely adopts an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) technology. As a multi-carrier technology, OFDM first divides the channel into several orthogonal sub-channels, converts the high-speed data stream into parallel low-speed sub-data streams, and finally modulates the low-speed sub-data stream onto each sub-channel for transmission. Due to the partial overlap between the carriers, the OFDM technology improves the utilization rate of the frequency band compared with the traditional frequency division multiplexing technology, and at the same time provides better anti-frequency selective fading performance than the traditional single-carrier system.

The channel bandwidth of WLAN is increasing continuously, from initially only supporting 20M channels, gradually expanding to support 40M, 60M, and 80M channels. Channels larger than 20M, such as 40M channels or 80M channels, can be composed of primary 20M channels (Primary 20M channels) and non-primary 20M channels (Secondary 20M channels, Worst 20M channels, etc.). In general, the primary 20M channel may be a channel specially configured for a certain access point (Access Point, AP) (ie, a channel exclusively used by the AP), while the non-primary 20M channel may be a channel shared by multiple APs.

WLAN introduces the concept of Basic Service Set (Basic Service Set, BSS), and BSS is generally composed of APs and stations (Station, STA). The packet data is transmitted between the AP and the STA according to the frame format of a certain protocol. Figure 1 is a schematic diagram of the physical layer grouping structure of the 802.11ax protocol. As shown in Figure 1, the preamble part of the physical layer grouping structure of the 802.11ax protocol includes a traditional preamble (Legacy Preamble) and a high efficiency (High Efficient, HE) preamble . The traditional preamble includes a short training field (Legacy Shorting Training Field, L-STF), a long training field (LegacyLong Training Field, L-LTF), and a signaling field (Legacy Signal Field, L-SIG). The high-efficiency preamble includes a high-efficiency signaling field A (High Efficient Signal Field A, HE-SIG-A), a high-efficiency signaling B field (High Efficiency Signal-B field, HE-SIG-B), a short training field (High Efficient ShortingTraining). Field, HE-STF), High Efficient Legacy Long Training Field (HE-LTF), etc.

In the frame structure shown in Figure 1, HE-SIG-A and HE-SIG-B are sent to all STAs by broadcasting, and the subcarrier bandwidth used by the OFDM symbols of HE-SIG-A and HE-SIG-B is 312.5KHz, for channels with bandwidths such as 20MHz, 40MHz, 80MHz, and 160MHz, corresponding to 64, 128, 256, and 512 subcarriers, respectively. Wherein, an OFDM symbol with a bandwidth of 20 MHz includes 48 or 52 data subcarriers for transmitting corresponding signaling information. HE-SIG-A and HE-SIG-B are respectively used to transmit different types of physical layer signaling. HE-SIG-A carries information such as the transmission bandwidth, the number of symbols of HE-SIG-B, and the Modulation and Coding Scheme (MCS) adopted; HE-SIGB carries the number of symbols and resource allocation of HE-LTF Since the number of STAs scheduled each time is variable, the number of HE-SIGB symbols is variable.

Generally, during the HE-SIGB transmission process, the AP only uses the primary channel to transmit the pilot signal, and does not transmit the pilot signal in each non-primary channel. In this way, a plurality of null sub-carriers appear in each of the non-primary channels at positions corresponding to the positions of the pilot signals in the primary channel. Specifically, taking the AP occupying 40M channels as an example, referring to FIG. 2 , the -21st, -7, 7, and 21st subcarriers of the primary 20M channel are used to transmit pilots, and the -21st, -7, and 21st subcarriers of the non-primary 20M channel Sub-carriers 7 and 21 are null sub-carriers. In the prior art, it is precisely by performing energy detection on these null subcarriers to determine whether the transmission process of the HE-SIG-B is interfered.

However, in the OBSS scenario, since the channels occupied by different BSSs at least partially overlap, when HE-SIG-B is transmitted in one BSS, it may be interfered by another BSS. However, if another BSS is also transmitting HE-SIG-B at the same time, since the positions of the null subcarriers on the non-primary channel correspond to the positions of the pilot signals on the primary channel, the non-primary channels of the two BSSs interfere with each other. The positions of the null sub-carriers on it will overlap, resulting in undetectable interference.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide an interference detection method and apparatus for a wireless local area network, so as to solve the problem that interference detection may not be performed during HE-SIG-B transmission.

A first aspect provides an interference detection method for a wireless local area network, comprising: determining the energy of a signal carried by a null subcarrier on a non-primary channel of the first BSS, wherein the first BSS and the second BSS occupy The frequency bands of the first BSS overlap at least partially, and the null subcarrier position pattern of the first BSS configuration is different from the null subcarrier position pattern of the second BSS configuration, wherein the null subcarrier position pattern of one BSS configuration is used to indicate the transmission of HE-SIG-B During the process, the relative position of the null sub-carrier on the non-primary channel of the one BSS; according to the energy of the signal carried by the null sub-carrier on the non-primary channel of the first BSS, it is determined that the transmission process of the target HE-SIG-B is subject to interference.

With reference to the first aspect, in an implementation manner of the first aspect, the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS are any of pre-configured N kinds of null subcarrier position patterns. Two, the N kinds of null subcarrier position patterns are obtained by cyclic shift based on the reference positions of null subcarriers in the non-primary channel.

In combination with the first aspect or any of the above implementation manners, in another implementation manner of the first aspect, the N kinds of null subcarrier position patterns are the null subcarriers at the reference position on both sides of the central DC subcarrier respectively. obtained after cyclic displacement.

With reference to the first aspect or any one of the above implementation manners, in another implementation manner of the first aspect, the reference position of the null subcarrier on the non-primary channel corresponds to the position of the pilot signal on the primary channel.

With reference to the first aspect or any one of the above implementation manners, in another implementation manner of the first aspect, the target HE-SIG-B is transmitted through a plurality of symbols, and the first BSS is in the plurality of symbols Different null subcarrier position patterns are configured on at least two symbols of .

In a second aspect, an interference detection apparatus for a wireless local area network is provided, including: a first determination module, configured to determine whether a target HE-SIG-B is on a non-primary channel of the first BSS when the target HE-SIG-B is transmitted in the first BSS The energy of the signal carried by the null subcarriers, wherein the frequency bands occupied by the first BSS and the second BSS at least partially overlap, and the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS different, wherein the null subcarrier position pattern configured by a BSS is used to indicate the relative position of the null subcarrier on the non-primary channel of the one BSS during the transmission process of the HE-SIG-B; the second determination module is used for according to the first A determination module determines the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS, and determines the interference suffered by the transmission process of the target HE-SIG-B.

With reference to the second aspect, in an implementation manner of the second aspect, the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS are any of the pre-configured N null subcarrier position patterns. Two, the N kinds of null subcarrier position patterns are obtained by cyclic shift based on the reference positions of null subcarriers in the non-primary channel.

In combination with the second aspect or any one of the above implementation manners, in another implementation manner of the second aspect, the N kinds of null subcarrier position patterns are the null subcarriers at the reference position on both sides of the central DC subcarrier respectively. obtained after cyclic displacement.

With reference to the second aspect or any one of the above implementation manners, in another implementation manner of the second aspect, the reference position of the null subcarrier on the non-primary channel corresponds to the position of the pilot signal on the primary channel.

With reference to the second aspect or any one of the above implementation manners, in another implementation manner of the second aspect, the target HE-SIG-B is transmitted through a plurality of symbols, and the first BSS is in the plurality of symbols Different null subcarrier position patterns are configured on at least two symbols of .

This embodiment of the present invention configures different null subcarrier position patterns for different BSSs, so that even if different BSSs transmit HE-SIG-B at the same time and in the same frequency band, the frequency domain positions of their null subcarriers will be staggered, avoiding the need for The problem of inability to detect interference during HE-SIG-B transmission.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of the physical layer packet structure of the 802.11ax protocol.

FIG. 2 is a schematic diagram of a null subcarrier location pattern based on a 40M channel.

FIG. 3 is an example diagram of an application scenario of the interference detection method according to an embodiment of the present invention.

FIG. 4 is a schematic flowchart of an interference detection method according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of null subcarrier position patterns of non-primary channels of different BSSs according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of null subcarrier position patterns of non-primary channels of different BSSs according to another embodiment of the present invention.

FIG. 7 is a schematic block diagram of an interference detection apparatus for a wireless local area network according to an embodiment of the present invention.

FIG. 8 is a schematic block diagram of an interference detection apparatus for a wireless local area network according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to a communication system using unlicensed spectrum resources, such as a WLAN system.

It should also be understood that, in this embodiment of the present invention, the AP is a network device that provides an access service. The STA is the other end device that accesses the access point through the wireless network for communication. For example, a user equipment (User Equipment, UE) may be referred to as a terminal (Terminal), a mobile station (Mobile Station, MS), a mobile terminal ( Mobile Terminal), etc., the present invention is not limited. However, for the convenience of description, the following embodiments take the AP and the STA as examples for description.

For ease of understanding, a scenario in which the interference detection method according to the embodiment of the present invention may be adopted is briefly introduced first.

FIG. 3 is an example diagram of an application scenario of the interference detection method according to an embodiment of the present invention. In the scenario shown in Figure 3, there are two BSSs, BSS1 and BSS2, wherein the frequency bands used by AP1 in BSS1 and AP2 in BSS2 for data transmission partially overlap, forming an OBSS. STA1 belongs to BSS1 and STA2 belongs to BSS2. When AP1 sends HE-SIG-B to STA1, since the channels used by AP1 and AP2 at least partially overlap, the transmission process of HE-SIG-B may be interfered by AP2.

Assuming that BSS1 transmits HE-SIG-B1 to STA1, BSS2 transmits HE-SIG-B2 to STA2. If the frequency bands of the non-primary 20M channels configured by BSS1 and BSS2 overlap, it means that in the process of transmitting HE-SIG-B , the null sub-carriers of BSS1 and BSS2 on the non-primary 20M channel overlap each other. At this time, although the transmission of HE-SIG-B2 will interfere with the transmission of HE-SIG-B1, the null sub-carriers of BSS1 are not Signal interference from HE-SIG-B2 transmissions is not detected.

In order to detect the interference in the above situation, the interference detection method according to the embodiment of the present invention is described in detail below with reference to FIG. 4 .

FIG. 4 is a schematic flowchart of an interference detection method according to an embodiment of the present invention. The method shown in FIG. 4 may be performed by an AP or a STA, or may be performed by a third-party device with an interference detection function. The method includes:

S410, when the target high-efficiency signaling field B HE-SIG-B is transmitted in the first basic service set BSS, determine the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS, wherein the first BSS The frequency bands occupied by the BSS and the second BSS at least partially overlap, and the null subcarrier position pattern configured by the first BSS is different from the null subcarrier position pattern configured by the second BSS, wherein the null subcarrier position pattern configured by one BSS is used to indicate During the transmission process of HE-SIG-B, the relative position of the null subcarrier on the non-primary channel of the above-mentioned one BSS.

It should be understood that the frequency bands occupied by the first BSS and the second BSS at least partially overlap; alternatively, the first BSS and the second BSS are adjacent BSSs; alternatively, the first BSS and the second BSS belong to same OBSS.

The null subcarrier position pattern configured by one BSS may specifically refer to the relative position or arrangement of null subcarriers on the non-primary channel of the above-mentioned one BSS when HE-SIG-B is transmitted in the one BSS.

The non-primary channel of the first BSS may refer to the non-primary 20M channel of the first BSS. The embodiment of the present invention mainly uses an example where both the primary channel and the non-primary channel are 20M channels, that is, the primary 20M channel and the non-primary 20M channel, but the embodiments of the present invention do not specifically limit the bandwidths of the primary channel and the non-primary channel.

S420, according to the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS, determine the interference suffered by the transmission process of the target HE-SIG-B.

Specifically, when the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS is higher than the threshold value set by the receiving end, it can be determined that the transmission process of the target HE-SIG-B is interfered; When the energy of the signal carried by the null subcarrier on the non-primary channel is lower than the threshold value set by the receiving end, it can be determined that the transmission process of the target HE-SIG-B is not disturbed.

This embodiment of the present invention configures different null subcarrier position patterns for different BSSs, so that even if different BSSs transmit HE-SIG-B at the same time and in the same frequency band, the frequency domain positions of their null subcarriers will be staggered, avoiding the need for The problem of inability to perform interference detection in the prior art.

Optionally, as an embodiment, the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS are any two of pre-configured N kinds of null subcarrier position patterns. The carrier position pattern is obtained by means of cyclic shift based on the reference position of the null subcarrier in the non-primary channel.

It should be understood that the above-mentioned cyclic shift may refer to performing cyclic shift in units of sub-carriers in the frequency range of the non-primary channel.

It should be understood that the above-mentioned reference position is not specifically limited in this embodiment of the present invention, and the reference position may correspond to the position of the pilot signal on the primary channel. As shown in Fig. 2, the positions of the -21st, -7th, 7th and 21st subcarriers are used for the null subcarriers in the reference positions of the non-primary channels. Alternatively, the reference position may be the position of the null sub-carrier obtained by adjusting the position of the pilot signal on the primary channel. For example, the reference position may be the adjacent null sub-carrier in the null sub-carrier corresponding to the pilot signal on the primary channel. The positions of the null subcarriers obtained after the interval of the null subcarriers are adjusted, and the number of the null subcarrier position patterns obtained after the cyclic shift can be increased by this adjustment. For example, the reference positions of the null subcarriers in the non-primary channel are the positions of the -21, -8, 8, and 21 subcarriers.

Specifically, when configuring the null subcarrier position pattern for the BSS, different null subcarrier position patterns may be configured for different BSSs according to the BSS Color (ie, the last 7 bits or the last 12 bits of the BSS ID).

Optionally, as an embodiment, the N types of null subcarrier position patterns may be obtained by cyclically shifting the null subcarriers at the reference position on both sides of the central DC subcarrier.

As shown in Figure 5, the 0th subcarrier is the central direct current (DC) subcarrier. When the -7th subcarrier is cyclically shifted to -1, the next cyclic shift is to the -26th subcarrier, that is, it does not cross the The central DC sub-carrier is cyclically shifted on both sides of the central DC sub-carrier. A total of 12 null sub-carrier position patterns can be obtained in this cyclic shift manner.

FIG. 6 is a schematic diagram of null subcarrier position patterns of non-primary channels of different BSSs according to another embodiment of the present invention. The position pattern of the null sub-carrier shown in FIG. 6 is obtained by cyclic displacement on both sides of the central DC sub-carrier (sub-carrier 0 in FIG. 5 ) based on the frequency domain position of the changed pilot signal as the reference position. As can be seen from Figure 6, the reference position is obtained by shortening the number of subcarrier intervals between pilot signals from 13 to 12 on both sides of the central DC subcarrier, and a total of 13 kinds of empty subcarrier position patterns are obtained. The above 13 kinds of empty subcarriers are obtained. The location pattern can correspond to up to 13 different BSSs.

Optionally, as an embodiment, the target HE-SIG-B transmits through multiple symbols, and the first BSS configures different null subcarrier position patterns on at least two symbols in the multiple symbols.

For example, the transmission target HE-SIG-B requires 2 OFDM symbol time lengths, then the null subcarrier position pattern of BSS1 shown in FIG. 4 can be configured for the first BSS in the first OFDM symbol time length, and in the second OFDM symbol The time length configures the null subcarrier position pattern of BSS2 shown in FIG. 4 , that is to say, the transmission target HE-SIG-B configures the combination of the null subcarrier position pattern of BSS1 shown in FIG. 4 and the null subcarrier position pattern of BSS2 for the first BSS .

For another example, the transmission target HE-SIG-B requires 2 OFDM symbol time lengths, then the null subcarrier position pattern of BSS1 shown in FIG. 5 can be configured for the first BSS in the first OFDM symbol time length, and in the second symbol The time length configures the null subcarrier position pattern of BSS2 shown in FIG. 5, that is to say, the transmission target HE-SIG-B configures the combination of the null subcarrier position pattern of BSS1 shown in FIG. 5 and the null subcarrier position pattern of BSS2 for the first BSS .

Based on the above embodiments, the combined null subcarrier position patterns are configured for different BSSs to meet the interference control and frequency reuse in the dense OBSS scenario.

In addition, it should be noted that, when determining the interference suffered by the transmission process of the target HE-SIG-B, it is assumed that multiple OFDM symbols are required to transmit the target HE-SIG-B, and the target HE-SIG-B can be transmitted only within a few OFDM symbols. The energy of the signal carried by the null sub-carrier on the non-primary channel is determined to simplify the complexity of the interference detection method according to the embodiment of the present invention. For example, when the transmission target HE-SIG-B requires 3 OFDM symbol time lengths, the energy of the signal carried by the null subcarrier on the non-primary channel may be determined within the first 2 OFDM symbol time.

The interference detection method for a wireless local area network according to an embodiment of the present invention is described in detail above with reference to FIGS. 1 to 6 , and the interference detection method for a wireless local area network according to an embodiment of the present invention will be described in detail below with reference to FIGS. 7 and 8 . detection device. It should be understood that the apparatuses shown in FIG. 7 and FIG. 8 can implement the various steps in FIG. 4 , which are not described in detail here to avoid repetition.

FIG. 7 is a schematic block diagram of an interference detection apparatus for a wireless local area network according to an embodiment of the present invention. The apparatus 700 shown in FIG. 7 includes a first determination module 710 and a second determination module 720 .

The first determination module 710 is used to determine the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS when the target HE-SIG-B is transmitted in the first BSS, wherein the first BSS is equal to The frequency bands occupied by the second BSS overlap at least partially, and the null subcarrier position pattern configured by the first BSS is different from the null subcarrier position pattern configured by the second BSS, wherein the null subcarrier position pattern configured by one BSS is used to indicate HE- During the transmission process of SIG-B, the relative position of the null subcarrier on the non-primary channel of the one BSS;

The second determination module 720 is configured to determine the interference suffered by the transmission process of the target HE-SIG-B according to the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS determined by the first determination module.

This embodiment of the present invention configures different null subcarrier position patterns for different BSSs, so that even if different BSSs transmit HE-SIG-B at the same time and in the same frequency band, the frequency domain positions of their null subcarriers will be staggered, avoiding the need for The problem of inability to perform interference detection in the prior art.

Optionally, as an embodiment, the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS are any two of pre-configured N kinds of null subcarrier position patterns. The carrier position pattern is obtained by means of cyclic shift based on the reference position of the null subcarrier in the non-primary channel.

Optionally, as an embodiment, the N types of null sub-carrier position patterns are obtained by cyclically shifting the null sub-carriers at the reference position on both sides of the central DC sub-carrier respectively.

Optionally, as an embodiment, the reference position of the null subcarrier on the non-primary channel corresponds to the position of the pilot signal on the primary channel.

Optionally, as an embodiment, the target HE-SIG-B transmits through multiple symbols, and the first BSS configures different null subcarrier position patterns on at least two symbols in the multiple symbols.

FIG. 8 is a schematic block diagram of an interference detection apparatus for a wireless local area network according to an embodiment of the present invention. The apparatus 800 shown in FIG. 8 includes:

a memory 810 for storing programs;

The processor 820 is configured to execute a program, and when the program is executed, the processor 820 is specifically configured to determine the slot on the non-primary channel of the first BSS when the target HE-SIG-B is transmitted in the first BSS The energy of the signal carried by the carrier, wherein the frequency bands occupied by the first BSS and the second BSS at least partially overlap, and the null subcarrier position pattern configured by the first BSS is different from the null subcarrier position pattern configured by the second BSS, The null subcarrier position pattern configured by a BSS is used to indicate the relative position of null subcarriers on the non-primary channel of the one BSS during the transmission process of the HE-SIG-B; according to the null subcarriers on the non-primary channel of the first BSS The energy of the signal carried by the carrier determines the interference suffered by the transmission process of the target HE-SIG-B.

This embodiment of the present invention configures different null subcarrier position patterns for different BSSs, so that even if different BSSs transmit HE-SIG-B at the same time and in the same frequency band, the frequency domain positions of their null subcarriers will be staggered, avoiding the need for The problem of inability to perform interference detection in the prior art.

Optionally, as an embodiment, the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS are any two of pre-configured N kinds of null subcarrier position patterns. The carrier position pattern is obtained by means of cyclic shift based on the reference position of the null subcarrier in the non-primary channel.

Optionally, as an embodiment, the N types of null sub-carrier position patterns are obtained by cyclically shifting the null sub-carriers at the reference position on both sides of the central DC sub-carrier respectively.

Optionally, as an embodiment, the reference position of the null subcarrier on the non-primary channel corresponds to the position of the pilot signal on the primary channel.

Optionally, as an embodiment, the target HE-SIG-B transmits through multiple symbols, and the first BSS configures different null subcarrier position patterns on at least two symbols in the multiple symbols.

It should be understood that, in this embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that the determination of B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.

It should be understood that the term "and/or" in this document is only an association relationship for describing associated objects, indicating that there may be three relationships, for example, A and/or B, which may be expressed as: A alone exists, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above-mentioned processes does not imply the order of execution, and the execution order of each process should be determined according to its functions and inherent logic, and should not be used in the embodiments of the present invention. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be divided into It may be integrated or may be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate parts may be described as being physically separate or not, and the components shown as units may be described as being or not being physical units, that is, they may be located in one place, or they may be distributed to on multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, or each unit may exist physically alone, or two or two upper units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, Several instructions are included to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, removable hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other various storage programs that can store program codes. medium.

As mentioned above, it is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited to this, any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (11)

1. an interference detection method for wireless local area network, is characterized in that, comprises: When the target high-efficiency signaling field B HE-SIG-B is transmitted in the first basic service set BSS, determine the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS, wherein the first The frequency bands occupied by the BSS and the second BSS at least partially overlap, and the null subcarrier position pattern configured by the first BSS is different from the null subcarrier position pattern configured by the second BSS. During the transmission process indicating HE-SIG-B, the relative position of the null subcarrier on the non-primary channel of the one BSS; According to the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS, the interference suffered by the transmission process of the target HE-SIG-B is determined. 2. The method according to claim 1, wherein the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS are pre-configured N kinds of null subcarrier position patterns. Any two, the N kinds of null subcarrier position patterns are obtained by adopting cyclic shift based on the reference positions of null subcarriers in the non-primary channel. 3 . The method according to claim 2 , wherein the N types of null subcarrier position patterns are obtained by cyclically shifting the null subcarriers at the reference position on both sides of the central DC subcarrier. 4 . 4. The method according to claim 2 or 3, wherein the reference position of the null subcarrier on the non-primary channel corresponds to the position of the pilot signal on the primary channel. 5. The method of claim 1, wherein the target HE-SIG-B is transmitted through a plurality of symbols, and the first BSS is configured on at least two symbols of the plurality of symbols Different null subcarrier location patterns. 6. An interference detection device for a wireless local area network, comprising: The first determining module, when the target high-efficiency signaling field B HE-SIG-B is transmitted in the first basic service set BSS, is used to determine the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS , wherein the frequency bands occupied by the first BSS and the second BSS at least partially overlap, and the null subcarrier position pattern configured by the first BSS is different from the null subcarrier position pattern configured by the second BSS, wherein one BSS The configured null subcarrier position pattern is used to indicate the relative position of the null subcarrier on the non-primary channel of the one BSS during the HE-SIG-B transmission process; The second determining module is configured to determine, according to the energy of the signal carried by the null subcarrier on the non-primary channel of the first BSS determined by the first determining module, the transmission process of the target HE-SIG-B is subject to interference. 7. The apparatus according to claim 6, wherein the null subcarrier position pattern configured by the first BSS and the null subcarrier position pattern configured by the second BSS are pre-configured N kinds of null subcarrier position patterns. Any two, the N kinds of null subcarrier position patterns are obtained by adopting cyclic shift based on the reference positions of null subcarriers in the non-primary channel. 8 . The apparatus of claim 7 , wherein the N types of null subcarrier position patterns are obtained by cyclically shifting the null subcarriers at the reference position on both sides of the central DC subcarrier. 9 . 9 . The apparatus according to claim 7 or 8 , wherein the reference position of the null subcarrier on the non-primary channel corresponds to the position of the pilot signal on the primary channel. 10 . 10. The apparatus of claim 6, wherein the target HE-SIG-B is transmitted over a plurality of symbols, and the first BSS is configured on at least two of the plurality of symbols Different null subcarrier location patterns. 11. The apparatus according to any one of claims 6-8, wherein the apparatus is an access point or a station in the first BSS.

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