CN106936749B

CN106936749B - Method, device and equipment for transmitting efficient short training field sequence

Info

Publication number: CN106936749B
Application number: CN201511020573.1A
Authority: CN
Inventors: 林伟; 奥德·里德里; 希米·西隆; 多伦·埃兹里; 根纳季·特所迪克; 刘乐; 薛鑫; 王宁娟; 淦明; 刘晟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2020-01-21
Anticipated expiration: 2035-12-30
Also published as: WO2017113997A1; CN106936749A

Abstract

The embodiment of the invention discloses a method, a device and equipment for transmitting a high-efficiency short training field HE-STF sequence. The method is applied to a wireless local area network, system frequency domain resources used by the wireless local area network are divided into a plurality of resource units RU according to a preset mode, and the method comprises the following steps: a sending end determines the position of an RU in system frequency domain resources; the transmitting end determines the transmitting power of the non-null subcarrier included in the RU according to the position of the RU in the system frequency domain resource; and transmitting the HE-STF sequence corresponding to the RU according to the transmission power. The method, the device and the equipment for transmitting the HE-STF sequence can reduce the PAPR value corresponding to the HE-STF sequence, thereby improving the signal coverage of a transmitting end and reducing the transmitting power of the transmitting end.

Description

Method, device and equipment for transmitting efficient short training field sequence

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for transmitting an efficient short training field sequence.

Background

A receiver of an existing WLAN (Wireless Local Area Network) system performs accurate AGC (Automatic Gain Control) adjustment on a received signal by using an HE-STF (High Efficient Short Training Field) sequence of a data frame, so that the signal enters an analog-to-digital converter with appropriate power, and is converted into a digital signal to further perform digital processing on the received signal. A signal with a large PAPR (Peak to average Power Ratio) increases the complexity of the digital/analog/digital converter and the requirement for the rf Power amplifier, so reducing the PAPR value corresponding to the HE-STF sequence is very important for increasing the signal coverage and reducing the transmission Power.

Currently, for some industry users, the PAPR value corresponding to the RU (Resource Unit) carrying the HE-STF sequence is still not small enough, for example, the PAPR value corresponding to 26RU (RU including 26 consecutive subcarriers) of the IEEE (Institute of electrical and Electronics Engineers) 802.11ax standard is 2.22dB (decibel) at minimum, and the PAPR value corresponding to 52RU (RU including 52 consecutive subcarriers) is 4.26dB at minimum.

Therefore, it is desirable to provide a technique capable of reducing the PAPR value corresponding to the HE-STF sequence.

Disclosure of Invention

The embodiment of the invention provides a method, a device and equipment for transmitting an HE-STF sequence, which can reduce the PAPR value corresponding to the HE-STF sequence.

In a first aspect, a method for transmitting an HE-STF sequence is provided, which is applied to a wireless local area network, where a system frequency domain resource used by the wireless local area network is divided into a plurality of RUs in a preset manner, and the method includes: a sending end determines the position of an RU in system frequency domain resources; the transmitting end determines the transmitting power of the non-empty subcarrier carried in the RU according to the position of the RU in the system frequency domain resource; and the transmitting end transmits the HE-STF sequence corresponding to the RU according to the transmitting power.

With reference to the first aspect, in a first possible implementation manner of the first aspect, before the sending end sends the HE-STF sequence, the method further includes: a sending end sends indication information, where the indication information is used to indicate a position of the RU in a system frequency domain resource, and the indication information includes: the method comprises bandwidth indication information, indication information of a frequency domain resource preset mode, equipment information of user equipment and position information of the RU, wherein the bandwidth indication information is used for indicating the size of a system frequency domain, and the equipment information of the user equipment is used for uniquely indicating the user equipment. By transmitting the indication information of the position of the RU allocated to the user equipment in the frequency domain to the receiving end, the receiving end can know the specific position of the RU carrying the HE-STF sequence and can save the indication resources.

With reference to the first aspect or the foregoing possible implementation manners, in a second possible implementation manner of the first aspect, the indication information further includes transmission type information, where the transmission type information is used to indicate that the RU is allocated to an IoT (internet of Things) user.

With reference to the first aspect or the foregoing possible implementations, in a third possible implementation of the first aspect, the location information of the RU includes information indicating a number of subcarriers included in the RU.

With reference to the first aspect or the foregoing possible implementations, in a fourth possible implementation of the first aspect, the indication information is located in a medium access control MAC layer or a physical PHY layer of the uplink trigger frame.

With reference to the first aspect or the foregoing possible implementation manners, in a fifth possible implementation manner of the first aspect, the determining the transmit power of the non-null subcarrier carried in the RU includes: and the transmitting end determines the transmitting power of the non-null sub-carriers in the RU by determining the power normalization factor of the non-null sub-carriers.

In a second aspect, an apparatus for transmitting HE-STF sequences is provided, which is applied to a wireless local area network, and system frequency domain resources used by the wireless local area network are divided into a plurality of RUs in a preset manner, and the apparatus includes: a first determining module, configured to determine a location of an RU in the system frequency domain resources; a second determining module, configured to determine, according to the position of the RU in the system frequency domain resources determined by the first determining module, the transmit power of the non-null subcarrier carried in the RU; and a first transmitting module for transmitting the HE-STF sequence corresponding to the RU according to the transmission power determined by the determining module.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the apparatus further includes: a second sending module, configured to send, to a receiving end, indication information before the first sending module sends the HE-STF sequence, where the indication information is used to indicate a position of the RU in a frequency domain resource of the system, and the indication information includes: the method comprises bandwidth indication information, indication information of a preset mode, equipment information of user equipment and position information of the RU, wherein the bandwidth indication information is used for indicating the size of a system frequency domain, and the equipment information of the user equipment is used for uniquely indicating the user equipment. By transmitting the indication information of the position of the RU allocated to the user equipment in the frequency domain to the receiving end, the receiving end can be made to know the specific position of the RU carrying the HE-STF sequence and can save the indication resources.

With reference to the second aspect or the foregoing possible implementations, in a second possible implementation of the second aspect, the indication information further includes transmission type information, where the transmission type information is used to indicate that the RU is allocated to an IoT user.

With reference to the second aspect or the foregoing possible implementations, in a third possible implementation of the second aspect, the location information of the RU includes information indicating a number of subcarriers included in the RU.

With reference to the second aspect or the foregoing possible implementation manner, in a fourth possible implementation manner of the second aspect, the indication information is located in indication information of a medium access control MAC layer or a physical PHY layer of an uplink trigger frame.

With reference to the second aspect or the foregoing possible implementation manner, in a fifth possible implementation manner of the second aspect, the second determining module is specifically configured to: the transmit power of the non-null subcarriers carried in the RU is determined by determining a power normalization factor for the non-null subcarriers.

In a third aspect, an apparatus for transmitting HE-STF sequences is provided, where the apparatus is applied to a wireless local area network, and system frequency domain resources used by the wireless local area network are divided into multiple RUs in a preset manner, and the apparatus includes: a processor, a memory, a bus system, and a transceiver. Wherein the processor, the memory and the transceiver are connected via the bus system, the memory is configured to store instructions, the processor is configured to execute the instructions stored by the memory to control the transceiver to receive signals or transmit signals, and when the processor executes the instructions stored by the memory, the execution causes the processor to execute the method of the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, there is provided a computer readable medium for storing a computer program comprising instructions for carrying out the method of the first aspect or any possible implementation manner of the first aspect.

In a fifth aspect, a resource indication method is provided, which is applied to a wireless local area network, where system frequency domain resources used by the wireless local area network are divided into multiple RUs in a preset manner, and the method includes: the system determines a location of an RU assigned to the user equipment among the plurality of RUs; the transmitting end transmits indication information to the receiving end, the indication information indicating a position of an RU allocated to a user equipment in a frequency domain, the indication information comprising: the method comprises bandwidth indication information, indication information of a preset mode, equipment information of user equipment and position information of the RU, wherein the bandwidth indication information is used for indicating the size of system frequency domain resources, and the equipment information of the user equipment is used for uniquely indicating the user equipment.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the indication information further includes transmission type information, and the transmission type information is used to indicate that the RU is allocated to an IoT user.

With reference to the fifth aspect or the foregoing possible implementation manner, in a second possible implementation manner of the fifth aspect, the location information of the RU includes information indicating a number of subcarriers included in the RU.

With reference to the fifth aspect or the foregoing possible implementation manners, in a third possible implementation manner of the fifth aspect, the indication information is located in a MAC layer or a PHY layer of the uplink trigger frame.

According to the method, the device and the equipment for transmitting the HE-STF sequence, the position of the RU allocated to the user equipment in the system frequency domain resource is determined, the sending processing is carried out according to the position, the HE-STF sequence corresponding to the RU is sent to the receiving end, the PAPR value corresponding to the HE-STF sequence can be reduced, the signal coverage of the sending end is improved, and the sending power of the sending end is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic flow chart of a method of transmitting HE-STF sequences according to an embodiment of the present invention.

Fig. 2 is a schematic architecture diagram of a WLAN system.

Fig. 3 is a schematic diagram of one way of partitioning frequency domain resources for a 20 megahertz (MHz) bandwidth.

Fig. 4 is a diagram illustrating the locations of RUs in the frequency domain where frequency domain resources of a 20MHz bandwidth may be partitioned.

Fig. 5 is a diagram illustrating the adjustment of the energy of the next 26RU sub-carrier in a 20MHz bandwidth.

Fig. 6 is a diagram illustrating another 26RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 7 is a diagram illustrating another 26RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 8 is a diagram illustrating another 26RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 9 is a diagram illustrating another 26RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 10 is a diagram illustrating another 26RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 11 is a diagram illustrating another 26RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 12 is a diagram illustrating another 26RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 13 is a diagram illustrating a next 52RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 14 is a diagram illustrating another 52RU subcarrier energy adjustment scheme for a 20MHz bandwidth.

Fig. 15 is a diagram illustrating another 52RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 16 is a diagram illustrating another 52RU subcarrier energy adjustment for a 20MHz bandwidth.

Fig. 17 is a schematic block diagram of an apparatus for transmitting HE-STF sequences according to an embodiment of the present invention.

Fig. 18 is a schematic block diagram of an apparatus for transmitting an HE-STF sequence according to an embodiment of the present invention.

Detailed Description

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

Fig. 1 is a schematic flow chart of a method 100 for transmitting HE-STF sequences according to an embodiment of the present invention, which is described from a transmitting end perspective, the method 100 being applied to a wireless local area network, system frequency domain resources used by the wireless local area network being divided into a plurality of RUs in a preset manner, the method 100 including:

s110, a sending end determines the position of an RU in system frequency domain resources;

s120, the transmitting end determines the transmitting power of the non-empty subcarrier carried in the RU according to the position of the RU in the system frequency domain resource;

and S130, the transmitting end transmits the HE-STF sequence corresponding to the RU according to the transmitting power.

The method 100 can be applied to various communication systems that realize Multi-User transmission by transmitting HE-STF sequences, for example, systems that perform communication by using OFDMA (Orthogonal Frequency Division Multiple Access) or MU-MIMO (Multi-User Multiple-Input Multiple-Output) or other methods.

Also, the method 100 may be applied to a WLAN, such as Wi-Fi (Wireless Fidelity), etc.

It should be understood that for convenience of description and understanding of the embodiments of the present invention, "RU # 1" described below is equivalent to "one RU" described in S110, and "position # 1" is equivalent to "a position of one RU in system frequency domain resources" in S110.

Fig. 2 is a schematic diagram of a WLAN system. As shown in fig. 2, the WLAN system includes one or more access points AP21 and one or more stations STA 22. And similarly, the station determines to carry out AGC adjustment on the received signal according to the lead code which is sent by the access point and comprises the HE-STF sequence, and carries out data transmission with the access point according to the signal.

Optionally, the sending end is a network side device or a terminal device.

Specifically, as a sending end, a network side device in the communication system may be an Access Point (AP) in the WLAN, where the AP may also be referred to as a wireless Access Point, a bridge, a hotspot, or the like, and may Access a server or a communication network.

As a transmitting end, a terminal device in the communication system may be a Station (STA) in a WLAN, the STA may also be referred to as a user, and may be a wireless sensor, a wireless communication terminal or a mobile terminal, such as a mobile phone (or referred to as a "cellular" phone) and a computer having a wireless communication function. For example, wireless communication devices, which may be portable, pocket-sized, hand-held, computer-embedded, wearable, or vehicle-mounted, exchange voice, data, etc., communication data with a radio access network.

It should be understood that the above-listed systems to which the method 100 of the embodiments of the present invention is applied are merely exemplary, and the present invention is not limited thereto, and for example, it is also possible to list: global System for mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), and Long Term Evolution (LTE).

Accordingly, the network device may be a Base Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved node B (eNB or e-NodeB) in LTE, a Micro cell Base Station (Micro), a Pico Base Station (Pico), a home Base Station (femtocell), or a femto Base Station (femto), which is not limited in the present invention. The Terminal device may be a Mobile Terminal (Mobile Terminal), a Mobile user equipment, etc., such as a Mobile telephone (or so-called "cellular" telephone).

The types of RUs (which may also be referred to as resource blocks) included for frequency domain resources of different bandwidths are different. Specifically, the WLAN follows a protocol in which positions (resource distribution maps) of possible divided RUs for various frequency domain resources to be allocated (20MHz, 40MHz, 80MHz, or 160MHz) are agreed, and a transmitting end may determine power of a subcarrier and/or determine an HE-STF sequence according to positions of RUs allocated to a user equipment in a frequency domain to reduce a PAPR value corresponding to the RUs.

The following describes in detail the way in which various frequency domain resources to be allocated in the protocol followed by the WLAN may be partitioned, and the rules for RU size partitioning in the WLAN system include: one RU is composed of 26 consecutive subcarriers (i.e., 26RU), one RU is composed of 52 consecutive subcarriers (i.e., 52RU), one RU is composed of 106 consecutive subcarriers (i.e., 106RU), and one RU is composed of 242 consecutive subcarriers (i.e., 242 RU). The following describes the above four cases, taking the resource division method of 20MHz bandwidth in IEEE802.11ax standard as an example.

Case 1

Alternatively, as shown in fig. 3, in the WLAN system, the number of FFT (fast fourier transform) points in a data symbol portion is 256, that is, there are 256 subcarriers, the left subcarrier 1 to subcarrier 6 (denoted as subcarrier [1:6], the same notation is used hereinafter) and the right subcarrier [252:256] are guard bands, the rest of the subcarriers can be used for carrying data information, the whole bandwidth can be divided into 9 26 RUs, wherein the 5 th 26RU is equally divided into two parts by 7 Direct Current (DC) subcarriers, and the remaining 4 subcarriers with the number of 7,60,198 and 251 (denoted as [7,60,198,251], the same notation is used hereinafter) are not used.

Case 2

Alternatively, the left sub-carrier [1:6] and the right sub-carrier [252:256] are guard bands, the remaining sub-carriers can be used to carry data information, and the entire bandwidth can be divided into 4 52 RUs and 1 26 RUs, where the 26 RUs are equally divided into two parts by 7 DC sub-carriers, and the remaining 4 sub-carriers [7,60,198,251] are unused.

Case 3

Alternatively, the left sub-carrier [1:6] and the right sub-carrier [252:256] are guard bands, the remaining sub-carriers can be used to carry data information, and the whole bandwidth can be divided into 2 106 RUs and 1 26 RUs, wherein the 26 RUs are equally divided into two parts by 7 DC sub-carriers.

Case 4

Alternatively, the left sub-carrier [1:6] and the right sub-carrier [252:256] are guard bands, the remaining sub-carriers can be used to carry data information, the entire bandwidth can be divided into 1 242 RUs, and the 242 RUs are equally divided into two parts by 3 DC sub-carriers.

Referring now to the locations of possible divided RUs of frequency domain resources of 20MHz bandwidth in the frequency domain, as shown in fig. 4, for a simple description of the possible divided resource unit locations, the resource unit distribution of 20MHz bandwidth is depicted or described as four layers:

the first layer is a 26RU distribution diagram, and there are 4 26 RUs on the left and right sides of the 26RU located at the center, i.e., RUs located at resource unit positions (hereinafter, referred to as positions) #1 to #4 and positions #6 to #9 shown in fig. 4, respectively.

The second layer is a distribution diagram of 52 RUs, and 2 RUs 52, i.e., RUs located at positions #10 to #13 shown in FIG. 4, are located on the left and right sides of the 26 RUs located at the center, respectively.

The third layer is a distribution diagram of 106 RUs, and there are 1 RU 106 on the left and right sides of the 26 RUs located at the center, i.e., RUs located at position #14 and position #15 shown in FIG. 4, respectively.

The fourth layer is a resource unit distribution map of 242 RU.

In the embodiment of the present invention, the frequency domain resources of 20MHz bandwidth may be divided into any RU in the first layer to the fourth layer in fig. 4, the divided RUs are allocated to a plurality of users, and each user can only allocate one of the divided RUs, and the resource allocation condition may be indicated by the resource allocation indication information described later.

Optionally, the method for transmitting the HE-STF sequence according to the embodiment of the present invention is based on a set of HE-STF sequences satisfying the ieee802.11ax protocol, where the sequence is generated by a basic sequence M, and M is specifically as follows:

M＝{-1 -1 -1 +1 +1 +1 -1 +1 +1 +1 -1 +1 +1 -1 +1}

the HE-STF sequence with a period of 1.6 mus (microseconds) at 20M bandwidth is:

where the positive and negative signs of the numbers in sequence M indicate the polarity of the subcarriers, and (1+ j) and sqrt (1/2) are the subcarrier coefficients. The HE-STF sequence with the period of 1.6 mus under the bandwidth of 20M has 30 non-zero values, which represents that 30 non-null sub-carriers under the bandwidth of 20M.

Because some industry users can adopt the HE-STF sequence with the period of 1.6us during uplink OFDMA transmission, the embodiment of the invention optimizes the HE-STF sequence with the period of 1.6 us. In addition, the embodiment of the invention provides the corresponding optional HE-STF sequence aiming at the specific RU, and the subcarrier energy adjusting scheme can also be simultaneously applied to the optional HE-STF sequence.

Adjusting the energy of the subcarrier requires adjusting the HE-STF sequence value corresponding to the subcarrier, the HE-STF sequence value corresponding to the subcarrier not requiring energy adjustment is still 1, the HE-STF sequence value corresponding to the subcarrier requiring energy adjustment can be adjusted to 0.5 by adjusting the subcarrier coefficient, and the HE-STF sequence value can also be adjusted to 0.55 or 0.45.

Optionally, in this embodiment of the present invention, determining the transmission power of non-null subcarriers in RU #1 includes:

the transmitting end determines the transmitting power of the non-null sub-carriers in RU #1 by determining the power normalization factor of the non-null sub-carriers.

The sub-carrier coefficients, and hence the transmit power of the non-null sub-carriers in RU #1, may be determined by determining a power normalization factor, which includes a power normalization parameter N_dsubcFor example: when the subcarrier coefficients of two subcarriers in one RU need to be adjusted from 1 to 0.5, N needs to be adjusted_dsubc Subtracting 1; if the subcarrier coefficient of a subcarriers in one RU needs to be adjusted from 1 to 0.5, N needs to be adjusted_dsubcDecreasing a/2;

a method of the transmitting end performing transmission processing according to the position #1 in the embodiment of the present invention will be described in detail below according to cases 1 to 4, respectively.

Case 1

Under a bandwidth of 20M, each layer of frequency domain may be divided into 9 26 RUs, and fig. 5 to 12 are schematic diagrams of subcarrier energy obtained by adjusting energy of subcarriers of each 26RU based on a basic sequence M, where a horizontal axis represents subcarrier numbers and vertical arrows represent energy of subcarriers.

As shown in fig. 5, the 26RU located at position #1 in the 20M bandwidth has a subcarrier sequence number of [8:33], and the non-null subcarriers have sequence numbers of [9,17,25,33 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [9,17,33] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [25] is not changed, so that the power of the subcarrier [9,17,33] becomes half of the original power, and the PAPR value corresponding to the 26RU is reduced to 1.50 dB.

As shown in fig. 6, the 26RU located at position #2 in the 20M bandwidth has corresponding subcarrier numbers [34:59], and the non-null subcarriers have corresponding subcarrier numbers [41,49,57 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [41,57] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [49] is not changed, so that the energy of the subcarrier [41,57] becomes half of the original energy, and the PAPR value corresponding to the 26RU is reduced to 1.25 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x } for the 26RU located at position #2, where x includes +1 or-1, and the subcarrier energy adjustment scheme for the 26RU may be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 26RU located at position #2 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 7, the sequence numbers of the subcarriers corresponding to the 26RU located at position #3 in the 20M bandwidth are [61:86], and the sequence numbers of the non-null subcarriers are [65,73,81 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [65,81] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [73] is not changed, so that the energy of the subcarrier [65,81] becomes half of the original energy, and the PAPR value corresponding to the 26RU is reduced to 4.26 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x } for the 26RU located at position #3, where x includes +1 or-1, and the subcarrier energy adjustment scheme for the 26RU may be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 26RU located at position #3 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 8, the 26RU located at position #4 in the 20M bandwidth has corresponding subcarrier numbers [88:112], and the non-null subcarriers have corresponding sequence numbers [89,97,105 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [89,105] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [97] is not changed, so that the energy of the subcarrier [89,105] becomes half of the original energy, and the PAPR value corresponding to the 26RU is reduced to 1.25 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x } for the 26RU located at position #4, where x includes +1 or-1, and the subcarrier energy adjustment scheme for the 26RU may be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 26RU located at position #4 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 9, the sequence numbers of the subcarriers corresponding to the 26RU located at position #6 in the 20M bandwidth are [146:171], and the sequence number of the non-null subcarrier is [153,161,169 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [153,169] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [161] is not changed, so that the energy of the subcarrier [153,169] becomes half of the original energy, and the PAPR value corresponding to the 26RU is reduced to 1.25 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x } for the 26RU located at position #6, where x includes +1 or-1, and the subcarrier energy adjustment scheme for the 26RU may be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 26RU located at position #6 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 10, the sequence numbers of the subcarriers corresponding to the 26RU located at position #7 in the 20M bandwidth are [172:197], and the sequence number of the non-null subcarrier is [177,185,193 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [177,193] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [185] is not changed, so that the energy of the subcarrier [177,193] becomes half of the original energy, and the PAPR value corresponding to the 26RU is reduced to 4.26 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x } for the 26RU located at position #7, where x includes +1 or-1, and the subcarrier energy adjustment scheme for the 26RU may be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 26RU located at position #7 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 11, the sequence numbers of the subcarriers corresponding to the 26RU located at position #8 in the 20M bandwidth are [199:224], and the sequence number of the non-null subcarrier is [201,209,217 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [201,217] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [209] is not changed, so that the energy of the subcarrier [201,217] becomes half of the original energy, and the PAPR value corresponding to the 26RU is reduced to 1.25 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x } for the 26RU located at position #8, where x includes +1 or-1, and the subcarrier energy adjustment scheme for the 26RU may be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 26RU located at position #8 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 12, the sequence numbers of the subcarriers corresponding to the 26RU located at position #9 in the 20M bandwidth are [225:250], and the sequence number of the non-null subcarrier is [225,233,241,249 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [225,241,249] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [233] is not changed, so that the power of the subcarrier [225,241,249] becomes half of the original power, and the PAPR value corresponding to the 26RU is reduced to 1.50 dB.

It should be understood that the value of x in the foregoing embodiment is not limited to +1 or-1, and any value of x that can reduce the PAPR value corresponding to the HE-STF sequence falls within the protection scope of the present invention, and the embodiment of the present invention is not limited thereto.

Therefore, according to the method for transmitting the HE-STF sequence of the embodiment of the present invention, by determining the positions of the RU #1 allocated to the user equipment in the plurality of RUs, determining the power of the non-null sub-carriers in the RU #1 and/or applying a new HE-STF sequence according to the position #1, and transmitting the target HE-STF sequence carried on the RU #1 to the receiving end, the PAPR value corresponding to the HE-STF sequence can be reduced, thereby improving the signal coverage of the transmitting end and reducing the transmission power of the transmitting end.

Case 2

Under a bandwidth of 20M, each layer of frequency domain may be divided into 4 52 RUs, and fig. 13 to 16 are schematic diagrams of subcarrier energy obtained by adjusting energy of subcarriers of each 52RU based on a basic sequence M, where a horizontal axis represents subcarrier numbers and vertical arrows represent energy of subcarriers.

As shown in fig. 13, the sequence number of the subcarrier corresponding to 52RU located at position #10 in the 20M bandwidth is [8:59], and the sequence number of the non-null subcarrier is [9,17,25,33,41,49,57 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [17,33,41,49] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [9,25,57] is not changed, so that the energy of the subcarrier [17,33,41,49] becomes half of the original energy, and the PAPR value corresponding to the 52RU is reduced to 3.85 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, x, -x, -x, x, -x } for the 52RU located at position #10, where x includes a value of +1 or-1, and the subcarrier energy adjustment scheme for the 52RU is directly applicable to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 52RU located at position #10 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 14, the sequence numbers of the subcarriers corresponding to 52RU located at position #11 in the 20M bandwidth are [61:112], and the sequence numbers of the non-null subcarriers are [65,73,81,89,97,105 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [65,73,97,105] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [81,89] is not changed, so that the energy of the subcarrier [65,73,97,105] becomes half of the original energy, and the PAPR value corresponding to the 52RU is reduced to 1.25 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x, x, -x, -x, -x } or { x, -x, -x, -x, -x, x }, where x includes +1 or-1, for the 52RU located at position #11, and the subcarrier energy adjustment scheme of the 52RU can be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 52RU located at position #11 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 15, the sequence numbers of the subcarriers corresponding to the 52RU located at position #12 under the 20M bandwidth are [146:197], and the sequence number of the non-null subcarrier is [153,161,169,177,185,193 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [153,161,185,193] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [169,177] is not changed, so that the energy of the subcarrier [153,161,185,193] becomes half of the original energy, and the PAPR value corresponding to the 52RU is reduced to 1.25 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, -x, x, -x, -x, -x } or { x, -x, -x, -x, -x, x }, where x includes +1 or-1, for the 52RU located at position #12, and the subcarrier energy adjustment scheme of the 52RU can be directly applied to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 52RU located at position #12 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

As shown in fig. 16, the sequence numbers of the subcarriers corresponding to the 52RU located at position #13 under the 20M bandwidth are [199:250], and the sequence number of the non-null subcarrier is [201,209,217,225,233,241,249 ].

Optionally, the HE-STF sequence value corresponding to the subcarrier [209,217,225,241] is adjusted to 0.5, and the HE-STF sequence value corresponding to the subcarrier [201,233,249] is not changed, so that the energy of the subcarrier [209,217,225,241] becomes half of the original energy, and the PAPR value corresponding to the 52RU is reduced to 3.85 dB.

Optionally, the embodiment of the present invention proposes a new HE-STF sequence { x, x, x, -x, -x, x, -x } for the 52RU located at position #13, where x includes a value of +1 or-1, and the subcarrier energy adjustment scheme for the 52RU is directly applicable to the sequence.

Specifically, the method for reducing the PAPR value corresponding to the HE-STF sequence in the embodiment of the present invention includes various schemes, and the sequence may be directly applied to the 52RU located at position #13 without adjusting the subcarrier energy; the sequence may not be applied, and the subcarrier energy may be adjusted; the subcarrier energy may also be adjusted while applying the sequence.

Case 3

Under 20M bandwidth, each layer of frequency domain may be divided into 2 106 RUs, and optionally, as an embodiment, one HE-STF sequence applicable to the 106 RUs located at position #14 or #15 is { x, x, x, -x, -x, -x, x, -x, x }, where x takes a value of +1 or-1.

Therefore, according to the method for transmitting the HE-STF sequence of the embodiment of the present invention, by determining the positions of the RU #1 allocated to the user equipment in the plurality of RUs, and applying the new HE-STF sequence according to the position #1, and transmitting the target HE-STF sequence carried on the RU #1 to the receiving end, the PAPR value corresponding to the HE-STF sequence can be reduced, thereby improving the signal coverage of the transmitting end and reducing the transmitting power of the transmitting end.

Case 4

Under 20M bandwidth, each layer of frequency domain may be divided into 1 242 RUs, and optionally, as an embodiment, one HE-STF sequence to which the 242 RUs may be applied is { -x, -x, x, x, x, x, -x, -x, -x, x, x, x, -x, x, -x, x, x }, where x includes +1 or-1.

Optionally, in this embodiment of the present invention, before the sending end performs sending processing, the method 100 further includes:

s140, the transmitting end transmits to the receiving end indication information indicating a position of RU #1 in a frequency domain, the indication information including: bandwidth indication information, indication information of a preset mode, device information of a user equipment and location information of the RU #1, wherein the bandwidth indication information is used for indicating the size of a system frequency domain, and the device information of the user equipment is used for uniquely indicating the user equipment.

In the embodiment of the invention, the sending end sends the indication information to the receiving end before sending processing, so that the receiving end can conveniently receive processing according to the indication information. The bandwidth indication information is used for indicating the size of a frequency domain used by data to be transmitted, the indication information of the preset mode is used for indicating the division mode of a system frequency domain, the division mode comprises the number of layers of the frequency domain and the type of RUs divided by each layer of the frequency domain, the device information is used for uniquely indicating user equipment for transmitting the data, so that the system allocates RUs to the user equipment, and the position information of the RU #1 is used for indicating the specific positions of the RUs allocated to the user equipment in the frequency domain.

Optionally, the indication information further includes transmission type information for indicating that the RU #1 is allocated to an IoT user, including but not limited to, devices or apparatuses for information exchange and communication according to an agreed protocol to achieve intelligent identification, positioning, tracking, monitoring or management, such as a two-dimensional code reading device, a Radio Frequency Identification (RFID) device, an infrared sensor, a global positioning system or a laser scanner.

Optionally, the location information of RU #1 further includes information indicating the number of subcarriers included in RU # 1.

The IoT characteristic is gradually becoming an important characteristic of the IEEE802.11ax standard, and since the bandwidth or resource unit used by IoT users is small, it is particularly important for IoT transmission to reduce the PAPR value of the HE-STF sequence for small RUs. Specifically, 1 bit may be added to the common part of the signaling to indicate that the transmission type is IoT transmission or normal transmission, for example, 0 may be used to indicate that the transmission type is IoT transmission, that is, RU #1 is allocated to IoT users, and 1 is used to indicate that the transmission type is normal transmission; it is also possible to indicate the transmission type as an IoT transmission with a "1" and a normal transmission with a "0".

If the transmission is an IoT transmission, 1 bit may be added to the common part of the signaling to indicate the number of subcarriers (26RU or 52RU) included in the RU allocated to the IoT user at this time, for example, an RU type allocated to the IoT user at this time may be indicated as 26RU by "0", and an RU type allocated to the IoT user at this time may be indicated as 52RU by "1"; it is also possible to indicate that the RU type allocated to the IoT user this time is 26RU with "1" and 52RU with "0".

Alternatively, as one embodiment, the RU allocated to the IoT user may be defined as one of the RUs located at positions #2, #4, #6, #8, #11, and # 12. If the type of RU allocated to the IoT user is 26RU, 2 bits may be added to the common part of the signaling to indicate the specific location of the RU at 20M bandwidth; if the type of RU allocated to the IoT user is 52RU, 1 bit may be added to the common part of the signaling to indicate the specific location of the RU at 20M bandwidth.

Specifically, if the type of RU assigned by the IoT user is 26RU, the RU may be indicated by "00" as being located at location #2, the RU may be indicated by "01" as being located at location #4, the RU may be indicated by "10" as being located at location #6, and the RU may be indicated by "11" as being located at location # 8; if the type of RU allocated to the IoT user is 52RU, the RU may be indicated as being located at location #11 by "0" and located at location #12 by "1".

It should be understood that the embodiments of the present invention are not limited thereto, for example, two bits may also be used to indicate the transmission type or the type of RU #1, and therefore, any information that may be used to indicate the transmission type or the type of RU #1 or the specific location of RU #1 in the frequency domain belongs to the protection scope of the present invention.

Optionally, the indication information is located in a MAC layer or a PHY layer of the uplink trigger frame.

Therefore, according to the method for transmitting the HE-STF sequence of the embodiment of the invention, the position of the RU #1 allocated to the user equipment in a plurality of RUs is determined, and the indication information of the position of the RU #1 in the frequency domain is sent to the receiving end, so that the receiving end can know the specific position of the RU allocated to the user equipment and carrying the HE-STF sequence, and the indication resource can be saved.

The method for transmitting the HE-STF sequence according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 16, and the apparatus for transmitting the HE-STF sequence according to the embodiment of the present invention is described in detail below with reference to fig. 17.

Fig. 17 is a schematic block diagram of an apparatus for transmitting HE-STF sequences according to an embodiment of the present invention. The apparatus is applied to a wireless local area network, a system frequency domain resource used by the wireless local area network is divided into a plurality of RUs according to a preset manner, as shown in fig. 17, the apparatus 1700 includes:

a first determining module 1710, configured to determine a location of an RU in a frequency domain resource of the system;

a second determining module 1720, configured to determine, according to the position of the RU in the system frequency domain resource determined by the first determining module 1710, a transmission power of a non-null subcarrier carried in the RU;

a first transmitting module 1730 configured to transmit the HE-STF sequence corresponding to the RU according to the transmit power determined by the second determining module 1720.

The device for transmitting the HE-STF sequence of the embodiment of the invention can reduce the PAPR value corresponding to the HE-STF sequence by determining the positions of the RU #1 allocated to the user equipment in a plurality of RUs, carrying out sending processing according to the position #1 and sending the target HE-STF sequence borne on the RU #1 to the receiving end, thereby improving the signal coverage of the sending end and reducing the transmitting power of the sending end.

Optionally, the apparatus 1700 further comprises:

a second sending module 1740, configured to send, to the receiving end, indication information before the first sending module 1730 sends the HE-STF sequence, where the indication information is used to indicate a position of RU #1 in a frequency domain, and the indication information includes: bandwidth indication information, indication information of the preset mode, device information of a user equipment and position information of RU #1, wherein the bandwidth indication information is used for indicating the size of a system frequency domain, and the device information of the user equipment is used for uniquely indicating the user equipment.

The device for transmitting the HE-STF sequence provided by the embodiment of the invention can ensure that the receiving end knows the specific position of the RU which is distributed to the user equipment and bears the HE-STF sequence by sending the indication information of the position of the RU #1 in the frequency domain to the receiving end, and can save the indication resources.

Optionally, the indication information further includes transmission type information indicating that RU #1 is allocated to the IoT user.

Optionally, the location information of RU #1 includes information indicating the number of subcarriers included in the RU.

Optionally, the second determining module 1720 is specifically configured to: the transmit power of the non-null subcarriers in RU #1 is determined by determining the power normalization factor for the non-null subcarriers.

The apparatus 1700 for transmitting an HE-STF sequence according to the embodiment of the present invention may correspond to the transmitting end in the method 100 according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the apparatus 1700 for transmitting information in fig. 17 are respectively used to implement corresponding flows of each step of the method 100 in fig. 1, and are not described herein again for brevity.

Therefore, according to the apparatus for transmitting HE-STF sequence of the embodiment of the present invention, by determining the positions of the RU #1 allocated to the user equipment in the plurality of RUs, determining the power of the non-null sub-carriers in the RU #1 and/or applying a new HE-STF sequence according to the position #1, and transmitting the target HE-STF sequence carried on the RU #1 to the receiving end, the PAPR value corresponding to the HE-STF sequence can be reduced, thereby improving the signal coverage of the transmitting end and reducing the transmission power of the transmitting end.

The method and apparatus for transmitting HE-STF sequence according to an embodiment of the present invention are described in detail above with reference to fig. 1 to 17, and the apparatus for transmitting HE-STF sequence according to an embodiment of the present invention is described in detail below with reference to fig. 18.

Fig. 18 is a schematic block diagram of an apparatus for transmitting an HE-STF sequence according to an embodiment of the present invention. As shown in fig. 18, the apparatus 1800 includes: a processor 1810, a memory 1820, a bus system 1830, and a transceiver 1840. The processor 1810, the memory 1820 and the transceiver 1840 are connected by a bus system 1830, the memory 1820 is used for storing instructions, and the processor 1810 is used for executing the instructions stored in the memory 1820 to control the transceiver 1840 to receive signals or transmit signals.

The processor 1810 is configured to determine a position of an RU in the system frequency domain resource, and determine a transmission power of a non-null subcarrier carried in the RU according to the position of the RU in the system frequency domain resource, and the transceiver 1840 is configured to perform a transmission process according to the transmission power determined by the processor 1810, and transmit an HE-STF sequence corresponding to the RU to a receiving end.

Therefore, according to the device for transmitting the HE-STF sequence of the embodiment of the present invention, by determining the positions of the RU #1 allocated to the user equipment in the plurality of RUs, performing the transmission processing according to the position #1, and transmitting the target HE-STF sequence carried on the RU #1 to the receiving end, the PAPR value corresponding to the HE-STF sequence can be reduced, thereby improving the signal coverage of the transmitting end and reducing the transmission power of the transmitting end.

It should be understood that, in the present embodiment, the processor 1810 may be a Central Processing Unit (CPU), and the processor 1810 may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 1820 may include both read-only memory and random access memory, and provides instructions and data to the processor 1810. A portion of the memory 1820 may also include non-volatile random access memory. The memory 1820 may also store device type information, for example.

The bus system 1830 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. But for purposes of clarity the various buses are labeled in the figure as bus system 1830.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1810. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1820, and the processor 1810 can read the information in the memory 1820, and complete the steps of the method in combination with the hardware. To avoid repetition, it is not described in detail here.

Optionally, as an embodiment, the transceiver 1840, before transmitting the HE-STF sequence, is further configured to: transmitting indication information to a receiving end, the indication information indicating a position of RU #1 in a frequency domain, the indication information comprising: bandwidth indication information, indication information of a preset mode, device information of a user equipment and location information of the RU #1, wherein the bandwidth indication information is used for indicating the size of a system frequency domain, and the device information of the user equipment is used for uniquely indicating the user equipment.

The equipment for transmitting the HE-STF sequence provided by the embodiment of the invention can ensure that the receiving end knows the specific position of the RU which is distributed to the user equipment and bears the HE-STF sequence by sending the indication information of the position of the RU #1 in the frequency domain to the receiving end, and can save the indication resources.

Optionally, as an embodiment, the transceiver 1840 transmits transmission type information to the receiving end, the transmission type information indicating that RU #1 is allocated to the IoT user.

Alternatively, as an embodiment, the transceiver 1840 transmits information indicating the number of subcarriers included in RU #1 to the receiving end.

Optionally, as an embodiment, the transceiver 1840 sends the indication information of the MAC layer or the PHY layer carried in the uplink trigger frame to the receiving end.

Optionally, as an embodiment, the processor 1810 determines the transmit power of the non-null subcarrier in RU #1 by determining a power normalization factor of the non-null subcarrier.

The device 1800 for transmitting the HE-STF sequence according to the embodiment of the present invention may correspond to the sending end device in the method according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the device 1800 for transmitting the HE-STF sequence in fig. 18 are respectively used to implement corresponding flows of each step of the method 100 in fig. 1, and are not described herein again for brevity.

Therefore, according to the device for transmitting the HE-STF sequence of the embodiment of the present invention, by determining the positions of the RU #1 allocated to the user equipment in the plurality of RUs, determining the power of the non-null sub-carriers in the RU #1 and/or applying a new HE-STF sequence according to the position #1, and transmitting the target HE-STF sequence carried on the RU #1 to the receiving end, the PAPR value corresponding to the HE-STF sequence can be reduced, thereby improving the signal coverage of the transmitting end and reducing the transmission power of the transmitting end.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

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 ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, 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 through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

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 be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting a high efficiency short training field HE-STF sequence is applied to a wireless local area network, wherein system frequency domain resources used by the wireless local area network are divided into a plurality of resource units RU according to a preset mode, and the method comprises the following steps:

a transmitting end determines the position of an RU in the frequency domain resource of the system;

the transmitting end determines the transmitting power of the non-null subcarrier included in the RU according to the position of the RU in the system frequency domain resource;

and the sending end sends the HE-STF sequence corresponding to the RU according to the sending power.

2. The method of claim 1, wherein before the transmitting end transmits the HE-STF sequence, the method further comprises:

the sending end sends indication information, where the indication information is used to indicate a position of the RU in the system frequency domain resource, and the indication information includes: bandwidth indication information, indication information of the preset mode, device information of user equipment, and location information of the RU, where the bandwidth indication information is used to indicate the size of the system frequency domain resource, and the device information of the user equipment is used to uniquely indicate the user equipment.

3. The method of claim 2, wherein the indication information further comprises transmission type information indicating that the RU is allocated to an Internet of things (IoT) user.

4. The method of claim 2 or 3, wherein the location information of the RU comprises information indicating the number of subcarriers comprised by the RU.

5. The method according to any of claims 2 to 3, wherein the indication information is located in a Medium Access Control (MAC) layer or a Physical (PHY) layer of an uplink trigger frame.

6. An apparatus for transmitting a high efficiency short training field HE-STF sequence, wherein the apparatus is applied to a wireless local area network, and system frequency domain resources used by the wireless local area network are divided into a plurality of resource units RU according to a preset manner, the apparatus comprising:

a first determining module, configured to determine a location of an RU in the system frequency domain resources;

a second determining module, configured to determine, according to the position of the RU in the system frequency domain resources determined by the first determining module, a transmit power of a non-null subcarrier included in the RU;

a first sending module, configured to send the HE-STF sequence corresponding to the RU according to the transmission power determined by the second determining module.

7. The apparatus of claim 6, further comprising:

a second sending module, configured to send, before the first sending module sends the HE-STF sequence, indication information, where the indication information is used to indicate a location of the RU in the system frequency domain resources, and the indication information includes: bandwidth indication information, indication information of the preset mode, device information of user equipment, and location information of the RU, where the bandwidth indication information is used to indicate the size of the system frequency domain resource, and the device information of the user equipment is used to uniquely indicate the user equipment.

8. The apparatus of claim 7, wherein the indication information further comprises transmission type information indicating that the RU is allocated to an Internet of things (IoT) user.

9. The apparatus of claim 7 or 8, wherein the location information of the RU comprises information indicating a number of subcarriers included in the RU.

10. The apparatus according to any of claims 7 to 8, wherein the indication information is located in a Medium Access Control (MAC) layer or a Physical (PHY) layer of an uplink trigger frame.