WO2016179807A1

WO2016179807A1 - Data transmission method, receiving end device and sending end device

Info

Publication number: WO2016179807A1
Application number: PCT/CN2015/078849
Authority: WO
Inventors: 颜敏
Original assignee: 华为技术有限公司
Priority date: 2015-05-13
Filing date: 2015-05-13
Publication date: 2016-11-17
Also published as: CN107409432B; CN107409432A

Abstract

Embodiments of the present invention provide a data transmission method, a receiving end device and a sending end device, applied to a wireless local area network (WLAN) with a 60GHz frequency band. The method comprises: receiving a physical layer protocol data unit (PPDU), the PPDU comprising a short training field, and a PPDU standard being a first standard or a second standard, wherein when the PPDU standard is the first standard, the short training field sequentially comprises 16 Golay sequences a and a Golay sequence -a, or when the PPDU standard is the second standard, the short training field sequentially comprises a Golay sequence -a, 16 Golay sequences a and a Golay sequence -a; mutually correlating the short training field and a pre-set Golay sequence, so as to obtain a mutual correlation result; and determining, according to the mutual correlation result, that the PPDU is a PPDU having the first standard or the second standard. Embodiments of the present invention can determine, according to a mutual correlation result, a standard of a physical frame, thereby automatically identifying the standard.

Description

Method for transmitting data, receiving device and transmitting device

Technical field

Embodiments of the present invention relate to the field of communications technologies, and, more particularly, to a method for transmitting data, a receiving end device, and a transmitting end device.

Background technique

The standardization of Wireless Local Area Networks (WLAN) by the 802.11 series of standards has greatly reduced the cost of WLAN technology. Wireless Fidelity (Wi-Fi) is a wireless network communication technology brand that is held by the Wi-Fi Alliance to improve interoperability between 802.11-based wireless network products using the 802.11 family of protocols. The wireless LAN can be called a Wi-Fi network.

Currently, the version of the 802.11 standard has evolved from 802.11a/b to 802.11g, 802.11n, 802.11ac, and the like. In order to ensure backward compatibility and interoperability between products of different 802.11 standard versions, starting from 802.11n, a Mixed Format (MF) preamble (hereinafter referred to as a preamble) is defined. The legacy field portion of the preamble is identical to the preamble field of 802.11a, and includes both a legacy short training field, a legacy long training field, and a legacy signaling field. The preamble after 802.11n includes non-traditional field parts in addition to the traditional field part, and specifically includes non-legacy signaling fields, non-traditional short training fields, and non-traditional long training fields. The non-traditional field part of 802.11n is named by High Throughput (HT), that is, the non-traditional field part includes a high throughput signaling field, a high throughput short training field, and a high throughput long training field. The non-traditional field part of 802.11ac is named after Very High Throughput (VHT), that is, the non-traditional field part includes, very high throughput signaling field A, very high throughput short training field, and very high throughput rate. Training field and very high throughput signaling field B. In several versions of the existing 802.11 standard, such as 802.11a/b, 802.11g, 802.11n, and 802.11ac, the differentiation of different protocol versions and the automatic detection of the receiving end can be realized by the modulation of symbols after the preamble conventional field.

For the existing 60 GHz high-frequency Wi-Fi, the existing standard is mainly 802.11ad. The standard currently supports a maximum rate of 6.7 Gbps. In order to meet higher rate requirements, new technologies and standards need to be introduced: the Next Generation 60G frequency band (NG60) standard. The introduction of new standards requires both backward compatibility and interoperability. Therefore, in the NG60 protocol, how to distinguish NG60 frames (also called physical frames, physical layer packets, or physical layers) Protocol Protocol Data Unit (PPDU) and 802.11ad frames have become an urgent problem to be solved.

Summary of the invention

The embodiment of the invention provides a method for transmitting data, a receiving end device and a transmitting end device, which can distinguish between an NG60 frame and an 802.11ad frame.

The first aspect provides a method for transmitting data, which is applied to a WLAN in a 60 GHz band, and includes: receiving a physical layer protocol data unit PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a The second standard, wherein, when the standard of the PPDU is the first criterion, the short training field sequentially includes 16 Gray sequence a and 1 Gray sequence -a, or when the standard of the PPDU is the second criterion, The short training field sequentially includes one Gray sequence-a, 16 Gray sequence a and one Gray sequence-a; the short training field is cross-correlated with the preset Gray sequence to obtain a cross-correlation result; according to the cross-correlation result Determining that the PPDU is a PPDU of the first standard or the second standard.

With reference to the first aspect, in the first implementation, the determining, according to the cross-correlation result, the PPDU of the PPDU that is the first standard or the second standard, includes: when the cross-correlation result includes a cross-correlated signal When the real part has a negative peak before the coarse synchronization position, the PPDU is determined to be the PPDU of the second standard, or when the cross-correlation result includes the real part of the cross-correlated signal without a negative peak before the coarse synchronization position, The PPDU is determined to be the PPDU of the first standard.

With reference to the first possible implementation manner, in the second implementation manner, when the PPDU is the PPDU of the second standard, the cross-correlation result further includes that the real part of the cross-correlated signal exists after the coarse synchronization position. The second negative peak, the method further includes: synchronizing the PPDU according to the second negative peak.

In combination with the first aspect, any one of the first to the second possible implementation manners, in a third possible implementation manner, the first standard is 802.11ad, and the second standard is the next generation. NG60 standard in the 60GHz band.

The second aspect provides a method for transmitting data, which is applied to a WLAN in a 60 GHz band, and includes: receiving a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where When the standard of the PPDU is the first criterion, the short training field sequentially includes 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a, or when the standard of the PPDU is the second standard. The short training field sequentially includes 1 Gray sequence-b, 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a; The field is cross-correlated with the preset Gray sequence to obtain a cross-correlation result; and the PPDU is determined to be the PPDU of the first standard or the second standard according to the cross-correlation result.

With reference to the second aspect, in a first implementation manner, determining, according to the cross-correlation result, the PPDU of the PPDU that is the first standard or the second standard, includes: when the cross-correlation result includes a cross-correlated signal When the real part has a negative peak before the coarse synchronization position, the PPDU is determined to be the PPDU of the second standard, or when the cross-correlation result includes the real part of the cross-correlated signal without a negative peak before the coarse synchronization position, The PPDU is determined to be the PPDU of the first standard.

With reference to the first possible implementation manner of the second aspect, in the second implementation manner, when the PPDU is the PPDU of the second standard, the cross correlation result further includes a real part of the cross correlation signal There is a second negative peak after the synchronization position, and the method further comprises: synchronizing the PPDU according to the second negative peak.

With reference to the second aspect, any one of the first to the second possible implementation manners of the second aspect, in a third possible implementation manner, the first standard is 802.11ad, the second The standard is the next-generation 60GHz band NG60 standard.

The third aspect provides a method for transmitting data, which is applied to a WLAN in a 60 GHz band, and includes: generating a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where When the standard of the PPDU is the first criterion, the short training field sequentially includes 16 Gray sequence a and 1 Gray sequence -a, or when the standard of the PPDU is the second criterion, the short training field is sequentially The Gray sequence - a, 16 Gray sequence a and 1 Gray sequence - a are included; the PPDU is transmitted.

In conjunction with the third aspect, in the first implementation, the first standard is 802.11ad and the second standard is the NG60 standard.

The fourth aspect provides a method for transmitting data, which is applied to a WLAN in a 60 GHz band, and includes: generating a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where When the standard of the PPDU is the first criterion, the short training field sequentially includes 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a, or when the standard of the PPDU is the second standard. The short training field sequentially includes 1 Gray sequence-b, 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a; the PPDU is transmitted.

In conjunction with the fourth aspect, in the first implementation, the first standard is 802.11ad, and the second standard is the NG60 standard.

In a fifth aspect, a receiving end device is provided for a wireless local area network in a 60 GHz band The WLAN includes: a receiving unit, configured to receive a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first standard The sequence includes 16 Gray sequence a and 1 Gray sequence -a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes a Gray sequence - a, 16 Gray sequence a and 1 Gray a sequence-a; a cross-correlation unit, configured to cross-correlate the short training field with a preset gray sequence to obtain a cross-correlation result; and the determining unit is configured to determine, according to the cross-correlation result, the PPDU as the first standard or the first Two standard PPDUs.

With reference to the first possible implementation manner of the fifth aspect, in a second implementation manner, the determining unit is specifically configured to: when the cross-correlation result includes a cross-correlation signal, the real part of the signal has a negative peak before the coarse synchronization position Determining that the PPDU is the PPDU of the second standard, or the determining unit is specifically configured to: when the real part of the cross-correlation result including the cross-correlation signal does not have a negative peak before the coarse synchronization position, determine the PPDU as the The first standard PPDU.

With reference to the first possible implementation manner of the fifth aspect, in the second implementation manner, when the PPDU is the PPDU of the second standard, the cross correlation result further includes a real part of the cross correlation signal A second negative peak exists after the synchronization position, and the receiving end device further includes: a synchronization unit, configured to perform synchronization of the PPDU according to the second negative peak.

With reference to the fifth aspect, any one of the possible implementation manners of the first to the second possible implementation manners of the fifth aspect, in a third possible implementation manner, the first standard is 802.11ad, the second The standard is the next-generation 60GHz band NG60 standard.

The sixth aspect provides a receiving end device, which is applied to a wireless local area network WLAN in a frequency band of 60 GHz, and includes: a receiving unit, configured to receive a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second a standard, wherein, when the standard of the PPDU is the first criterion, the short training field sequentially includes 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a, or the standard of the PPDU is In the second criterion, the short training field sequentially includes 1 Gray sequence-b, 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a; a cross-correlation unit for the short training field Performing cross-correlation with the preset Gray sequence to obtain a cross-correlation result; and determining a unit, configured to determine, according to the cross-correlation result, the PPDU as the PPDU of the first standard or the second standard.

With reference to the first possible implementation manner of the sixth aspect, in a second implementation manner, the determining unit is specifically configured to: when the real part of the cross-correlation result including the cross-correlation signal has a negative peak before the coarse synchronization position Determining that the PPDU is a PPDU of the second standard, or the determining unit is specific When the real part of the cross correlation result including the cross correlation result does not have a negative peak before the coarse synchronization position, the PPDU is determined to be the PPDU of the first standard.

With reference to the first possible implementation manner of the sixth aspect, in the second implementation manner, when the PPDU is the PPDU of the second standard, the cross correlation result further includes a real part of the cross correlation signal A second negative peak exists after the synchronization position, and the receiving end device further includes: a synchronization unit, configured to perform synchronization of the PPDU according to the second negative peak.

With reference to the sixth aspect, the possible implementation manner of any one of the first to the second possible implementation manners of the sixth aspect, in the third possible implementation manner, the first standard is 802.11ad, the second The standard is the next-generation 60GHz band NG60 standard.

The seventh aspect provides a transmitting end device, which is applied to a WLAN in a 60 GHz band, and includes: a generating unit, configured to generate a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second a standard, wherein, when the standard of the PPDU is the first criterion, the short training field sequentially includes 16 Gray sequence a and 1 Gray sequence -a, or when the standard of the PPDU is the second standard, the short The training field sequentially includes a Gray sequence-a, 16 Gray sequence a and 1 Gray sequence-a, and a sending unit for transmitting the PPDU.

In conjunction with the seventh aspect, in the first implementation, the first standard is 802.11ad, and the second standard is the NG60 standard.

The eighth aspect provides a transmitting end device, which is applied to a wireless local area network WLAN in a frequency band of 60 GHz, and includes: a generating unit, configured to generate a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second a standard, wherein, when the standard of the PPDU is the first criterion, the short training field sequentially includes 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a, or the standard of the PPDU is In the second criterion, the short training field sequentially includes 1 Gray sequence-b, 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a; and a sending unit, configured to send the PPDU.

In conjunction with the eighth aspect, in the first implementation, the first standard is 802.11ad, and the second standard is the NG60 standard.

Based on the foregoing technical solution, the embodiment of the present invention obtains a cross-correlation result by performing cross-correlation between the short training field and a preset Gray sequence, and determines that the PPDU is the first criterion (for example, 802.11ad) according to the cross-correlation result. Or a PPDU of the second standard (eg, NG60). The embodiment of the present invention can determine the standard of the PPDU according to the cross-correlation result, and realize the identification of the NG60 frame and the 802.11ad frame.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of a scenario for transmitting data applicable to an embodiment of the present invention.

2 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention.

FIG. 3 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention.

4 is a schematic block diagram of a PPDU of the 802.11ad standard, in accordance with one embodiment of the present invention.

Figure 5 is a schematic block diagram of a short training field in accordance with one embodiment of the present invention.

6 is a schematic block diagram of a short training field in accordance with one embodiment of the present invention.

Figure 7 is a schematic block diagram of signals after correlation operations in accordance with one embodiment of the present invention.

FIG. 8 is a schematic block diagram of signals after correlation operations in accordance with another embodiment of the present invention.

9 is a schematic block diagram of signals after correlation operations in accordance with another embodiment of the present invention.

FIG. 10 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention.

FIG. 11 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention.

Figure 12 is a schematic block diagram of a sink device in accordance with one embodiment of the present invention.

Figure 13 is a schematic block diagram of a transmitting device in accordance with one embodiment of the present invention.

FIG. 14 is a schematic block diagram of a sink device according to another embodiment of the present invention.

FIG. 15 is a schematic block diagram of a transmitting device according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The technical solution of the present invention can be applied to an Orthogonal Frequency Division Multiplexing (OFDM) system, for example, a WLAN system, in particular, Wireless Fidelity (WiFi), etc.; It can be applied to a single carrier (SC) system. Of course, the method of the embodiment of the present invention may also apply other classes. The embodiment of the present invention is not limited herein.

Correspondingly, the sender device and the receiver device may be user stations (Stations, STAs) in the WLAN, and the user sites may also be referred to as systems, subscriber units, access terminals, mobile stations, mobile stations, remote stations, and remote terminals. , a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, a user device, or a user equipment (User Equipment, UE). The STA may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or a wireless local area network ( A handheld device such as a Wi-Fi) communication function, a computing device, or other processing device connected to a wireless modem.

In addition, the sending end device and the receiving end device may also be an access point (AP, Access Point) in the WLAN, and the access point may be used to communicate with the access terminal through the wireless local area network, and transmit the data of the access terminal to the network side. Or transmit data from the network side to the access terminal.

The receiving end device may be a communication peer corresponding to the sending end device.

Hereinafter, for ease of understanding and explanation, the execution process and actions of the method and apparatus for transmitting data of the present invention in a Wi-Fi system will be described by way of example and not limitation.

FIG. 1 is a schematic diagram of a scenario for transmitting data applicable to an embodiment of the present invention. The scenario system shown in FIG. 1 may be a WLAN system. The system of FIG. 1 includes one or more access points AP 101 and one or more site STAs 102. FIG. 1 exemplifies one access point and two sites. Wireless communication can be made between the access point 101 and the site 102 by various standards. The access point 101 and the site 102 can be wirelessly communicated by using a multi-user multiple-input multiple-output (MU-MIMO).

2 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention. The method shown in Figure 2 is performed by the receiving device, and the receiving device can be a station or an access point. When the transmitting device is an access point, the receiving device is a station; when the transmitting device is a station, the receiving device is For the access point. Specifically, the method shown in FIG. 2 is applied to a wireless local area network WLAN in the 60 GHz band, including:

210. Receive a physical layer protocol data unit PPDU, where the PPDU includes a short training field, where the standard of the PPDU is a first standard or a second standard, where the short training field sequentially includes 16 gray sequence a when the standard of the PPDU is the first standard. (Ga128) and 1 Gray sequence -a(-Ga128), or, when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence - a, 16 Gray sequence a and 1 Gray sequence - a;

220. Cross-correlate the short training field with the preset Gray sequence to obtain a cross-correlation result.

230. Determine, according to the cross-correlation result, a PPDU whose PPDU is the first standard or the second standard.

Therefore, the embodiment of the present invention obtains a cross-correlation result by performing cross-correlation between the short training field and the preset Gray sequence, and determines that the PPDU is the first standard (for example, 802.11ad) or the second standard (for example, NG60) according to the cross-correlation result. PPDU. The embodiment of the invention can determine the standard of the PPDU according to the cross-correlation result, and realize the identification of the NG60 frame and the 802.11ad frame.

Specifically, in the WLAN of the 60 GHz band, in order to distinguish the PPDU of the first standard from the PPDU of the second standard, the embodiment of the present invention is different according to the short training field of the two protocol versions, specifically, the PPDU is a single When the carrier or the multi-carrier is transmitted, the short training field in the PPDU of the second standard is one more than the short training field of the first standard. In addition, the embodiment of the present invention is based on the short training field and the preset gray sequence of the PPDU. The result of the cross-correlation is determined to determine the PPDU as the PPDU of the first standard or the second standard, which can solve the problem that the prior art has difficulty distinguishing the PPDUs of the first standard and the second standard.

It should also be understood that the preset golay sequence may also be referred to as a local Gray sequence, which may be a known sequence that is pre-set at the receiving end. The preset Gray sequence can be a Gray sequence a.

FIG. 3 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention. The method shown in Figure 3 is performed by the receiving device, and the receiving device can be a station or an access point. When the transmitting device is an access point, the receiving device is a station; when the transmitting device is a station, the receiving device is For the access point. Specifically, the method shown in FIG. 3 is applied to a wireless local area network WLAN in the 60 GHz band, including:

310. Receive a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is the first standard or the second standard, where the short training field sequentially includes 48 Gray sequence b (Gb128), 1 when the standard of the PPDU is the first standard. Gray sequence-b (-Gb128) and 1 Gray sequence-a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence - b, 48 Gray sequence b, 1 Gray Sequence-b and 1 Gray sequence-a;

320: Cross-correlate the short training field with the preset Gray sequence to obtain a cross-correlation result.

330. Determine, according to the cross-correlation result, a PPDU whose PPDU is the first standard or the second standard.

Specifically, in the WLAN of the 60 GHz band, in order to distinguish the PPDU of the first standard from the PPDU of the second standard, the embodiment of the present invention is different according to the short training field of the two protocol versions, specifically, the PPDU is controlled. When the physical layer (PHY) is transmitted, the short training field in the PPDU of the second standard is one more than the short training field of the first standard. In addition, the embodiment of the present invention is based on the short training field and preset of the PPDU. The result of the cross correlation of the Gray sequence to determine the PPDU as the PPDU of the first standard or the second standard can solve the problem that the prior art has difficulty distinguishing the PPDUs of the first standard and the second standard.

It should also be understood that the preset Gray sequence may also be referred to as a local Gray sequence, and may be a known sequence that is previously set at the receiving end. The preset Gray sequence can be a Gray sequence b.

It should be understood that the difference between the embodiment of FIG. 2 and FIG. 3 is that the PPDU in the embodiment of FIG. 2 is a PPDU applied to single carrier or multi-carrier transmission, and the PPDU in the embodiment of FIG. 3 is used to control physical layer transmission. PPDU, under the same standard, the short training fields of the two are different, but the two embodiments in FIG. 2 and FIG. 3 similarly cross-correlate the short training field with the preset Gray sequence to obtain cross-correlation results; and according to cross-correlation As a result, the PPDU is determined to be the PPDU of the first standard or the second standard. Therefore, the following is a detailed description of the implementation of FIG. 2, and the corresponding method of the embodiment of FIG. 3 can refer to the corresponding content of the embodiment of FIG. 2, and the detailed description is omitted as appropriate to avoid repetition.

Optionally, as another embodiment, the first standard is 802.11ad, and the second standard is the next-generation 60 GHz band NG60 standard.

For example, FIG. 4 is a schematic diagram of a PPDU of the 802.11ad standard according to an embodiment of the present invention. The PPDU shown in FIG. 4 includes: Short Training Field (STF), Channel Estimation (CE), Indicator Signal Field (Header), Data Field (data), and Automatic Gain Control Field (Auto Gain Control). , AGC) and adjustment field (TRN-R/T), etc., wherein the STF is used for synchronization, frequency offset estimation, AGC adjustment; the CE is used for channel estimation; the indication signal field is used to indicate the indication signal, for example, can be used Indicates the modulation mode of the data frame, etc.; AGC indicates automatic gain control; TRN-R/T indicates precise adjustment of the receive or transmit end beam.

In the embodiment of the present invention, in order to distinguish between different PPDUs (802.11ad frames and NG60 frames) and compatibility, the STF front end of the existing frame structure in 11ad repeats the last Gore sequence once, thus forming NG60. The STF structure of the frame.

For example, as shown in FIG. 5, when the PPDU is a single carrier or a multi-carrier transmission, the short training field short training field of the PPDU of the first standard (8021.11ad) may include 16 Gray sequence a. And a short training field short training field of a Gray sequence-a, second standard (NG60) PPDU may include 1 Gray sequence - a, 16 Gray sequence a and 1 Gray sequence - a.

As shown in FIG. 6, in the PPDU is a Control Physical Layer (PHY) transmission, the short training field of the PPDU of the first standard (8021.11ad) may include 48 Gray sequence b, 1 Gray sequence - b and 1 Gray sequence - a short training field short training field of the PPDU of the second standard (NG60) may include 1 Gray sequence - b, 48 Gray sequence b, 1 Gray sequence - b and 1 Gray sequence - a;

It should be understood that the STF sequence can be used for synchronization and AGC adjustment work, and the STF is used for synchronization, mainly using related operations, including autocorrelation and cross-correlation operations, and the signals of related operations are as shown in FIG. 7, wherein The dotted line in 7 indicates the signal amplitude map after autocorrelation, which can be used to perform coarse synchronization. The solid line indicates the signal amplitude map after cross-correlation operation with the local Gray sequence, and the negative peak is used for fine synchronization.

It should be noted that when the PPDU is for single carrier or multi-carrier transmission, the preset Gray sequence may be Ga128. When the PPDU is for controlling physical layer transmission, the preset Gray sequence may be Gb128.

Optionally, as another embodiment, in 230, when the cross-correlation result includes a real part of the cross-correlated signal having a negative peak before the coarse synchronization position, determining that the PPDU is the PPDU of the second standard; or, when The correlation result includes that the real part of the cross-correlated signal does not have a negative peak before the coarse synchronization position, and the PPDU is determined to be the PPDU of the first standard.

For example, as shown in FIG. 7, the cross-correlation result does not have a negative peak before the coarse synchronization position, so it can be determined that the signal amplitude map shown in FIG. 7 corresponds to the 802.11ad frame.

Optionally, as another embodiment, when the PPDU is the second standard PPDU, the cross-correlation result further includes that the real part of the cross-correlated signal has a second negative peak after the coarse synchronization position.

The method of the embodiment of the present invention further includes: synchronizing the PPDU according to the second negative peak.

According to an embodiment of the present invention, the first negative peak is used to determine the frame type (whether a negative peak occurs before the coarse synchronization position is determined), and the second negative peak is used for the frame synchronization operation. At the same time, since there is one more Gray sequence in the NG60 frame than in the 802.11ad frame, the statistic is increased, and the accuracy of the AGC is improved.

Specifically, in the Additive White Gaussian Noise (AWGN) channel, the signal generated when the cross-correlation operation is performed at the high and low signal-to-noise ratio (SNR), respectively, is shown in FIG. 8 and FIG. As shown in Fig. 8, Fig. 8 is a schematic diagram showing the real part of the signal in the case of high SNR, and Fig. 9 is a schematic diagram showing the real part of the signal in the case of low SNR. The dotted line in Figure 8 represents the real part of the signal after autocorrelation, and the solid line represents the letter after cross-correlation with the local golay sequence. The real part of the number. It can be seen from FIG. 8 and FIG. 9 that two negative peaks appear in the cross-correlation signal, which are the first negative peak and the second negative peak, respectively, in the low SNR or the high SNR, wherein the first embodiment can be used in the embodiment of the present invention. The negative peak (the negative peak appearing before the coarse synchronization position) is used to judge the frame type. Specifically, when there is the first negative peak, the PPDU can be determined to be an NG60 frame, and when the first negative peak does not exist, the PPDU can be determined to be an 802.11ad frame. The second negative peak is used for frame synchronization operation. Since the NG60 frame has more than one negative Gray sequence than the 802.11ad frame, not only does the normal AGC adjustment not be affected, but further, the accuracy of the AGC is improved due to the increase of the Gray sequence statistics. Since the first negative peak exists in both of FIG. 8 and FIG. 9, it can be determined that the signals shown in FIGS. 8 and 9 correspond to the NG60 frame.

In the above, the method for transmitting data according to the embodiment of the present invention is described from the perspective of the receiving device in conjunction with FIG. 1 to FIG. 9, and the transmission data of the embodiment of the present invention will be described from the perspective of the transmitting device in conjunction with FIG. 10 and FIG. method.

Specifically, FIG. 10 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention. The method shown in FIG. 10 is performed by a transmitting device, and the transmitting device may be a station or an access point. When the transmitting device is an access point, the receiving device is a site; when the transmitting device is a site, the receiving device is For the access point. Specifically, the method shown in FIG. 10 is applied to a wireless local area network WLAN in the 60 GHz band, including:

1010. Generate a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is a first standard or a second standard, where the short training field sequentially includes 16 Gray sequence a and 1 Gray sequence when the standard of the PPDU is the first standard. -a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes a Gray sequence - a, 16 Gray sequence a and 1 Gray sequence - a;

1020. Send a PPDU.

In other words, the PPDU is sent to the receiving device so that the receiving device determines the standard of the PPDU according to the short training field.

Therefore, the embodiment of the present invention generates a PPDU and sends the PPDU to the receiving device. The receiving end device cross-correlates the short training field with the preset Gray sequence to obtain a cross-correlation result; and determines, according to the cross-correlation result, the PPDU as a PPDU of the first standard (for example, 802.11ad) or the second standard (for example, NG60). The embodiment of the invention can determine the standard of the PPDU according to the cross-correlation result, and realize the identification of the NG60 frame and the 802.11ad frame.

FIG. 11 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention. The method shown in FIG. 11 is performed by a transmitting device, and the transmitting device may be a station or an access point. When the transmitting device is an access point, the receiving device is a site; when the transmitting device is a site, the receiving device is For the access point. Specifically, the method shown in FIG. 11 is applied to a wireless local area network WLAN in the 60 GHz band, including:

1110: Generate a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is the first standard or the second standard, where the short training field sequentially includes 48 Gray sequence b and 1 Gray sequence when the standard of the PPDU is the first standard. -b and 1 Gray sequence -a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence - b, 48 Gray sequence b, 1 Gray sequence - b and 1 Gray Sequence-a;

1120. Send a PPDU.

Therefore, the embodiment of the present invention generates a PPDU and sends the PPDU to the receiving end device, so that the receiving end device cross-correlates the short training field with the preset Gray sequence to obtain a cross-correlation result; and determines the PPDU according to the cross-correlation result. A PPDU of a standard (eg 802.11ad) or a second standard (eg NG60). The embodiment of the invention can determine the standard of the PPDU according to the cross-correlation result, and realize the identification of the NG60 frame and the 802.11ad frame.

It should be understood that the difference between the embodiment of FIG. 10 and FIG. 11 is that the PPDU in the embodiment of FIG. 10 is a PPDU applied to single carrier or multi-carrier transmission, and the PPDU in the embodiment of FIG. 11 is used to control physical layer transmission. PPDUs, under the same standard, the short training fields of the two are different, but the two embodiments of FIG. 10 and FIG. 11 both transmit PPDUs in the same manner, so that the receiving end cross-correlates the short training field with the preset Gray sequence to obtain mutual Correlation result; and determining the PPDU as the first standard or the second standard PPDU according to the cross correlation result. Therefore, the following is a detailed description of the implementation of FIG. 10, and the corresponding method of the embodiment of FIG. 11 can refer to the corresponding content of the embodiment of FIG. 10, and the detailed description is omitted as appropriate to avoid repetition.

It should be noted that the embodiment shown in FIG. 10 corresponds to the embodiment shown in FIG. 2, and the difference between the embodiments shown in FIG. 10 is that the transmitting end device shown in FIG. 10 is the peer device of the receiving end device of FIG. For the exchange process between the sender device and the receiver device in FIG. 10, reference may be made to the embodiment shown in FIG. 2, and details are not described herein again.

It should be noted that the embodiment shown in FIG. 11 corresponds to the embodiment shown in FIG. 3, and the difference between the embodiments shown in FIG. 11 is that the transmitting end device shown in FIG. 11 is the peer device of the receiving end device of FIG. The exchange process between the sender device and the receiver device in FIG. 11 can refer to the embodiment shown in FIG. 3, and details are not described herein again.

Hereinabove, a method of transmitting data according to an embodiment of the present invention is described with reference to FIGS. 1 through 11, and an apparatus for transmitting data according to an embodiment of the present invention will be described below with reference to FIGS. 12 to 15.

Figure 12 is a schematic block diagram of a sink device in accordance with one embodiment of the present invention. In a wireless local area network (WLAN) WLAN, the receiving end device may be a station or an access point. When the transmitting end device is an access point, the receiving end device is a station; when the transmitting end device is a station, the receiving end device is connected. Entry point. The receiving device 1200 shown in FIG. 12 includes a receiving unit 1210, a cross-correlation unit 1220, and a determining unit 1230.

It should be understood that the receiving end device 1200 shown in FIG. 12 can implement various processes related to the receiving end device in the method embodiment shown in FIG. 1 to FIG. 11. The specific functions of the receiving end device 1200 shown in FIG. 12 can be referred to FIG. In the respective processes performed by the receiving device in FIG. 11, in order to avoid repetition, the detailed description is omitted as appropriate herein.

Specifically, when FIG. 12 corresponds to the embodiment of FIG. 2, the receiving unit 1210 is configured to receive a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where the PPDU is in the PPDU. When the standard is the first criterion, the short training field sequentially includes 16 Gray sequence a and 1 Gray sequence -a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes the Gray sequence - a, 16 Gray sequence a and 1 Gray sequence -a;

The cross-correlation unit 1220 is configured to cross-correlate the short training field with the preset gray sequence to obtain a cross-correlation result;

The determining unit 1230 is configured to determine, according to the cross-correlation result, a PPDU whose PPDU is the first standard or the second standard.

When FIG. 12 corresponds to the embodiment of FIG. 3, the receiving unit 1310 is configured to receive a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first standard. The sequence includes 48 Gray sequence b, 1 Gray sequence-b and 1 Gray sequence-a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence - b, 48 Gray Sequence b, 1 Gray sequence-b and 1 Gray sequence-a;

Optionally, as another embodiment, the determining unit 1230 is specifically configured to: when the cross-correlation result includes a cross-correlation signal, the real part of the signal has a negative peak before the coarse synchronization position, and determine that the PPDU is the second standard PPDU.

Alternatively, the determining unit 1230 is specifically configured to determine that the PPDU is the PPDU of the first standard when the real part of the cross-correlation result including the cross-correlation signal does not have a negative peak before the coarse synchronization position.

The receiving end device further includes: a synchronization unit, configured to perform synchronization of the PPDU according to the second negative peak.

Figure 13 is a schematic block diagram of a transmitting device in accordance with one embodiment of the present invention. In a wireless local area network WLAN applied to the 60 GHz band, the transmitting end device may be a station or an access point. When the transmitting end device is an access point, the receiving end device is a station; when the transmitting end device is a station, the receiving end device is connected. Entry point. The transmitting device 1300 shown in FIG. 13 includes a generating unit 1310 and a transmitting unit 1320.

It should be understood that the transmitting end device 1300 shown in FIG. 13 can implement various processes related to the transmitting end device in the method embodiment shown in FIG. 1 to FIG. 11. The specific functions of the receiving end device 1300 shown in FIG. 13 can be referred to FIG. The respective processes performed by the transmitting device in 11 are omitted in detail to avoid duplication.

Specifically, when FIG. 13 corresponds to the embodiment of FIG. 10, the generating unit 1310 is configured to generate a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where, when the standard of the PPDU is the first standard, The short training field sequentially includes 16 Gray sequence a and 1 Gray sequence -a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes the Gray sequence - a, 16 Gray sequence a and 1 Gray Sequence-a;

The sending unit 1320 is configured to send a PPDU.

When the embodiment of FIG. 13 corresponds to the embodiment of FIG. 11 , the generating unit 1310 is configured to generate a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first standard. The sequence includes 48 Gray sequence b, 1 Gray sequence-b and 1 Gray sequence-a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence - b, 48 Gray Sequence b, 1 Gray sequence-b and 1 Gray sequence-a;

The sending unit 1320 is configured to send a PPDU.

Therefore, the embodiment of the present invention generates a PPDU and sends the PPDU to the receiving end device, so that the receiving end device cross-correlates the short training field with the preset Gray sequence to obtain a cross correlation correlation. And determining, according to the cross-correlation result, the PPDU as a PPDU of the first standard (for example, 802.11ad) or the second standard (for example, NG60). The embodiment of the invention can determine the standard of the PPDU according to the cross-correlation result, and realize the identification of the NG60 frame and the 802.11ad frame.

Optionally, as another embodiment, the first standard is 802.11ad, and the second standard is NG60 standard.

FIG. 14 is a schematic block diagram of a sink device according to another embodiment of the present invention. In a wireless local area network (WLAN) WLAN, the receiving end device may be a station or an access point. When the transmitting end device is an access point, the receiving end device is a station; when the transmitting end device is a station, the receiving end device is connected. Entry point. The receiving device 1400 shown in FIG. 14 includes a processor 1410, a memory 1420, a bus system 1430, and a transceiver 1440.

It should be understood that the receiving end device 1400 shown in FIG. 14 corresponds to the receiving end device shown in FIG. 12, and can implement various processes related to the receiving end device in the method embodiment shown in FIG. 1 to FIG. The specific functions of the receiving device 1400 can be referred to the respective processes performed by the receiving device in FIGS. 1 to 11. To avoid repetition, the detailed description is omitted as appropriate herein.

Specifically, when FIG. 14 corresponds to the embodiment of FIG. 2, the transceiver 1440 receives the PPDU sent by the sending end device, where the PPDU includes a short training field, and the standard of the PPDU is the first standard or the second standard, where the standard of the PPDU is In a standard, the short training field sequentially includes 16 Gray sequence a and 1 Gray sequence -a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence - a, 16 Gray sequence a and a Gray sequence-a; the processor 1410 is configured to call the code stored in the memory 1420 by the bus system 1430, and cross-correlate the short training field with the preset Gray sequence to obtain a cross-correlation result; and determine according to the cross-correlation result The PPDU is a PPDU of the first standard or the second standard.

When FIG. 14 corresponds to the embodiment of FIG. 3, the transceiver 1440 receives the PPDU sent by the sending device. The standard of the PPDU is the first standard or the second standard. When the standard of the PPDU is the first standard, the short training field is sequentially included. 48 Gray sequence b, 1 Gray sequence - b and 1 Gray sequence - a, or, when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence - b, 48 Gray sequence b, 1 Gray sequence-b and 1 Gray sequence-a; processor 1410 is used to pass The bus system 1430 calls the code stored in the memory 1420 to cross-correlate the short training field with the preset Gray sequence to obtain a cross-correlation result; and determine the PPDU as the first standard or the second standard PPDU according to the cross-correlation result.

The method disclosed in the above embodiments of the present invention may be applied to the processor 1410 or implemented by the processor 1410. Processor 1410 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1410 or an instruction in a form of software. The processor 1410 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc. In the storage medium. The storage medium is located in the memory 1420. The processor 1410 reads the information in the memory 1420 and completes the steps of the foregoing method in combination with hardware. The bus system 1430 may include a power bus, a control bus, and a status signal bus in addition to the data bus. Wait. However, for clarity of description, various buses are labeled as bus system 1430 in the figure.

Optionally, as another embodiment, the processor 1410 is specifically configured to: when the cross-correlation result includes a cross-correlation signal, the real part of the signal has a negative peak before the coarse synchronization position, and determine that the PPDU is the second standard PPDU.

Alternatively, the processor 1410 is specifically configured to determine that the PPDU is the PPDU of the first standard when the real part of the cross-correlation result including the cross-correlation signal does not have a negative peak before the coarse synchronization position.

Optionally, as another embodiment, when the PPDU is the second standard PPDU, the cross-correlation The result also includes that the real part of the cross-correlated signal has a second negative peak after the coarse synchronization position.

The processor 1410 is further configured to perform synchronization of the PPDU according to the second negative peak.

FIG. 15 is a schematic block diagram of a transmitting device according to another embodiment of the present invention. In a wireless local area network WLAN applied to the 60 GHz band, the transmitting end device may be a station or an access point. When the transmitting end device is an access point, the receiving end device is a station; when the transmitting end device is a station, the receiving end device is connected. Entry point. The transmitting device 1500 shown in FIG. 15 includes a processor 1510, a memory 1520, a bus system 1530, and a transceiver 1540.

It should be understood that the transmitting end device 1500 shown in FIG. 15 is corresponding to the transmitting end device shown in FIG. 11 , and the processes related to the transmitting end device in the method embodiment shown in FIG. 1 to FIG. 9 can be implemented. For specific functions of the receiving device 1500, reference may be made to the processes performed by the transmitting device in FIGS. 1 to 9. To avoid repetition, the detailed description is omitted as appropriate herein.

Specifically, when FIG. 15 corresponds to the embodiment of FIG. 10, the processor 1510 is configured to generate a PPDU by calling the code stored in the memory 1520 through the bus system 1530. The PPDU includes a short training field, and the standard of the PPDU is the first standard or the second. The standard, wherein, when the standard of the PPDU is the first criterion, the short training field sequentially includes 16 Gray sequence a and 1 Gray sequence -a, or when the standard of the PPDU is the second standard, the short training field sequentially includes 1 Gray sequence-a, 16 Gray sequence a and 1 Gray sequence-a;

The transceiver 1540 transmits a PPDU to the receiving device, so that the receiving device determines the standard of the PPDU according to the short training field.

When FIG. 15 corresponds to the embodiment of FIG. 11, the processor 1510 is configured to use the bus system 1530 to call the code stored in the memory 1520 to generate a PPDU. The standard of the PPDU is the first standard or the second standard, where the standard of the PPDU is For the first criterion, the short training field sequentially includes 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a, or, when the standard of the PPDU is the second standard, the short training field includes 1 in sequence. Gray sequence - b, 48 Gray sequence b, 1 Gray sequence-b and 1 Gray sequence-a;

The method disclosed in the foregoing embodiments of the present invention may be applied to the processor 1510 or implemented by the processor 1510. The processor 1510 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1510 or an instruction in a form of software. The processor 1510 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc. In the storage medium. The storage medium is located in the memory 1520. The processor 1510 reads the information in the memory 1520 and completes the steps of the foregoing method in combination with hardware. The bus system 1530 may include a power bus, a control bus, and a status signal bus in addition to the data bus. Wait. However, for clarity of description, various buses are labeled as bus system 1530 in the figure.

It is to be understood that the phrase "one embodiment" or "an embodiment" or "an" Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification is not necessarily It must refer to the same embodiment. In addition, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention. The implementation process constitutes any limitation.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that in the 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 determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, for clarity of hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of cells is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, ie may be located in one place, or It can also be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for transmitting data, characterized in that, in a wireless local area network WLAN applied to a frequency band of 60 GHz, the method includes:

Receiving a physical layer protocol data unit (PPDU), the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first criterion The sequence includes 16 Gray sequence a and 1 Gray sequence -a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes 1 Gray sequence - a, 16 Gray sequence a and 1 Gray sequence - a;

Cross-correlating the short training field with a preset Gray sequence to obtain a cross-correlation result;

Determining, according to the cross-correlation result, the PPDU as a PPDU of the first standard or the second standard.
The method of claim 1 wherein

Determining, according to the cross-correlation result, the PPDU of the PPDU that is the first standard or the second standard, including:

Determining that the PPDU is a PPDU of the second standard when the cross correlation result includes a real part of the cross-correlated signal having a negative peak before the coarse synchronization position,

Or, when the cross-correlation result includes a real part of the cross-correlated signal that does not have a negative peak before the coarse synchronization position, determining that the PPDU is the PPDU of the first standard.
The method of claim 2 wherein:

When the PPDU is the PPDU of the second standard, the cross-correlation result further includes that the real part of the cross-correlated signal has a second negative peak after the coarse synchronization position,

The method also includes performing synchronization of the PPDUs according to the second negative peak.
The method according to any one of claims 1 to 3, wherein the first standard is 802.11ad and the second standard is the next-generation 60 GHz band NG60 standard.
A method for transmitting data, characterized by being applied to a wireless local area network WLAN in a frequency band of 60 GHz, including

Receiving a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where the short training field includes 48 in sequence when the standard of the PPDU is the first criterion. a Gray sequence b, a Gray sequence-b, and a Gray sequence-a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes one Gray sequence - b, 48 Gray sequence b, 1 Gray sequence-b and 1 Gray sequence-a;

Cross-correlating the short training field with a preset Gray sequence to obtain a cross-correlation result;

Determining, according to the cross-correlation result, the PPDU as a PPDU of the first standard or the second standard.
The method of claim 5 wherein:

Determining, according to the cross-correlation result, the PPDU of the PPDU that is the first standard or the second standard, including:

Determining that the PPDU is a PPDU of the second standard when the cross correlation result includes a real part of the cross-correlated signal having a negative peak before the coarse synchronization position,

Or, when the cross-correlation result includes a real part of the cross-correlated signal that does not have a negative peak before the coarse synchronization position, determining that the PPDU is the PPDU of the first standard.
The method of claim 6 wherein:

When the PPDU is the PPDU of the second standard, the cross-correlation result further includes that the real part of the cross-correlated signal has a second negative peak after the coarse synchronization position,

The method also includes performing synchronization of the PPDUs according to the second negative peak.
The method according to any one of claims 5 to 7, wherein the first standard is 802.11ad and the second standard is the next-generation 60 GHz band NG60 standard.
A method for transmitting data, characterized in that, in a wireless local area network WLAN applied to a frequency band of 60 GHz, the method includes:

Generating a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where the short training field includes 16 in sequence when the standard of the PPDU is the first criterion. a Gray sequence a and a Gray sequence -a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes a Gray sequence - a, 16 Gray sequence a, and 1 Gray sequence - a;

Send the PPDU.
The method of claim 9 wherein:

The first standard is 802.11ad and the second standard is NG60 standard.
A method for transmitting data, characterized in that, in a wireless local area network WLAN applied to a frequency band of 60 GHz, the method includes:

Generating a PPDU, where the PPDU includes a short training field, and the standard of the PPDU is a first standard or a second standard, where the short training field includes 48 in sequence when the standard of the PPDU is the first criterion. Gray sequence b, 1 Gray sequence - b and 1 Gray sequence -a, or, When the standard of the PPDU is the second criterion, the short training field sequentially includes 1 Gray sequence-b, 48 Gray sequence b, 1 Gray sequence-b, and 1 Gray sequence-a;

Send the PPDU.
The method of claim 11 wherein

The first standard is 802.11ad and the second standard is NG60 standard.
A receiving end device, characterized in that, in a wireless local area network WLAN applied to a frequency band of 60 GHz, the method includes:

a receiving unit, configured to receive a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first criterion The sequence includes 16 Gray sequence a and 1 Gray sequence -a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes a Gray sequence -a, 16 Gray sequence a and 1 Gray sequence-a;

a cross-correlation unit, configured to cross-correlate the short training field and the preset Gray sequence to obtain a cross-correlation result;

And a determining unit, configured to determine, according to the cross-correlation result, the PPDU as the PPDU of the first standard or the second standard.
The receiving device according to claim 13, wherein

The determining unit is specifically configured to: when the cross-correlation result includes a cross-correlation signal, the real part of the signal has a negative peak before the coarse synchronization position, and determine that the PPDU is the PPDU of the second standard.

Alternatively, the determining unit is specifically configured to: when the real part of the cross-correlation result including the cross-correlation signal does not have a negative peak before the coarse synchronization position, determine that the PPDU is the PPDU of the first standard.
The receiving device according to claim 14, wherein

When the PPDU is the PPDU of the second standard, the cross-correlation result further includes that the real part of the cross-correlated signal has a second negative peak after the coarse synchronization position,

The receiving device further includes:

And a synchronization unit, configured to perform synchronization of the PPDU according to the second negative peak.
The receiving end device according to any one of claims 13 to 15, wherein the first standard is 802.11ad, and the second standard is a next-generation 60 GHz band NG60 standard.
A receiving end device, characterized in that, in a wireless local area network WLAN applied to a frequency band of 60 GHz, the method includes:

a receiving unit, configured to receive a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first criterion The sequence includes 48 Gray sequence b, 1 Gray sequence-b and 1 Gray sequence-a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes 1 Gray sequence -b, 48 Gray sequence b, 1 Gray sequence - b and 1 Gray sequence - a;

a cross-correlation unit, configured to cross-correlate the short training field and the preset Gray sequence to obtain a cross-correlation result;

And a determining unit, configured to determine, according to the cross-correlation result, the PPDU as the PPDU of the first standard or the second standard.
The receiving device according to claim 17, wherein

The determining unit is specifically configured to: when the cross-correlation result includes a cross-correlation signal, the real part of the signal has a negative peak before the coarse synchronization position, and determine that the PPDU is the PPDU of the second standard.

Alternatively, the determining unit is specifically configured to: when the real part of the cross-correlation result including the cross-correlation signal does not have a negative peak before the coarse synchronization position, determine that the PPDU is the PPDU of the first standard.
The receiving device according to claim 18, characterized in that

When the PPDU is the PPDU of the second standard, the cross-correlation result further includes that the real part of the cross-correlated signal has a second negative peak after the coarse synchronization position,

The receiving device further includes:

And a synchronization unit, configured to perform synchronization of the PPDU according to the second negative peak.
The receiving end device according to any one of claims 17 to 19, wherein the first standard is 802.11ad, and the second standard is a next-generation 60 GHz band NG60 standard.
A transmitting end device, characterized in that, in a wireless local area network WLAN applied to a frequency band of 60 GHz, the method includes:

a generating unit, configured to generate a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first criterion The sequence includes 16 Gray sequence a and 1 Gray sequence -a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes a Gray sequence -a, 16 Gray sequence a and 1 Gray sequence-a;

a sending unit, configured to send the PPDU.
The transmitting device according to claim 21, wherein

The first standard is 802.11ad and the second standard is NG60 standard.
A transmitting end device, characterized in that, in a wireless local area network WLAN applied to a frequency band of 60 GHz, the method includes:

a generating unit, configured to generate a PPDU, where the PPDU includes a short training field, where the standard of the PPDU is a first standard or a second standard, where the short training field is when the standard of the PPDU is the first criterion The sequence includes 48 Gray sequence b, 1 Gray sequence-b and 1 Gray sequence-a, or, when the standard of the PPDU is the second criterion, the short training field sequentially includes 1 Gray sequence -b, 48 Gray sequence b, 1 Gray sequence - b and 1 Gray sequence - a;

a sending unit, configured to send the PPDU.
The transmitting device according to claim 23, characterized in that

The first standard is 802.11ad and the second standard is NG60 standard.